CN108462424A - Machine winding connection control circuit, frequency-variable air-conditioner and control method - Google Patents

Machine winding connection control circuit, frequency-variable air-conditioner and control method Download PDF

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Publication number
CN108462424A
CN108462424A CN201810004794.7A CN201810004794A CN108462424A CN 108462424 A CN108462424 A CN 108462424A CN 201810004794 A CN201810004794 A CN 201810004794A CN 108462424 A CN108462424 A CN 108462424A
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CN
China
Prior art keywords
relay
machine winding
compressor
phases
connection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810004794.7A
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Chinese (zh)
Inventor
王慧锋
任新杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Meizhi Compressor Co Ltd
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Guangdong Meizhi Compressor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Guangdong Meizhi Compressor Co Ltd filed Critical Guangdong Meizhi Compressor Co Ltd
Priority to CN201810004794.7A priority Critical patent/CN108462424A/en
Publication of CN108462424A publication Critical patent/CN108462424A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
    • H02P25/18—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
    • H02P25/184—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays wherein the motor speed is changed by switching from a delta to a star, e.g. wye, connection of its windings, or vice versa
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
    • H02P27/10—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation using bang-bang controllers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/14—Electronic commutators
    • H02P6/16—Circuit arrangements for detecting position
    • H02P6/18—Circuit arrangements for detecting position without separate position detecting elements
    • H02P6/182—Circuit arrangements for detecting position without separate position detecting elements using back-emf in windings

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

The present invention provides a kind of machine winding connection control circuits of compressor, including：Controller, the first to the 6th relay and machine winding, by first to third relay first end respectively with the input terminal of the U phases of machine winding, V phases and W phases it is one-to-one be attached, second end respectively with the input terminal of the W phases of machine winding, U phases and V phases it is one-to-one be attached, third end respectively with the first control terminal of controller to third control terminal it is one-to-one be attached, the 4th end is commonly connected to the first supply voltage；By the first end of the 4th to the 6th relay respectively with the output end of the U phases of machine winding, V phases and W phases it is one-to-one be attached, second end is attached mutually, third end respectively with the 4th control terminal to the 6th control terminal of controller it is one-to-one be attached, the 4th end is commonly connected to the second supply voltage.Correspondingly, the invention also provides frequency-variable air-conditioners and control method.The program can be promoted frequency-variable air-conditioner full frequency band APF values.

Description

Machine winding connection control circuit, frequency-variable air-conditioner and control method
Technical field
The present invention relates to frequency-variable air-conditioner technical fields, are controlled in particular to the machine winding connection of compressor Circuit, frequency-variable air-conditioner and control method.
Background technology
Currently, frequency-changeable compressor field, motor type is generally three-phase permanent magnet synchronous motor, and the stator coil of the inside uses Wye connection.Wye connection can be by PFC (Power Factor Correction, PFC) and weak in low frequency Magnetic control obtains higher APF (Annual Performance Factor, annual energy consumption efficiency) value, for a user It can cause the higher situation of the electricity charge.But with the increase of external environment temperature (system loading), compressor frequency can gradually be raised to height Frequently, the APF values of wye connection can obviously decay at this time.The traditional way of man of Compressors Factory is usually to increase the circle of stator winding Number, that is, the discharge capacity for increasing compressor carry out improving energy efficiency, and air-conditioning producer is usually the size for increasing evaporator and condenser.But it is this Method is related to the changing of entire air-conditioning system, the increase of automatically controlled plate electrical power, the scheme of optimization is complicated, cost also very It is high.
Invention content
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
For this purpose, an object of the present invention is to provide a kind of machine winding connection control circuit of new compressor, By controlling machine winding wye connection and delta-connected mutual conversion, come promoted frequency-variable air-conditioner full frequency band APF Value, to reduce the cost that user uses air-conditioning equipment.
It is another object of the present invention to correspondences to propose frequency-variable air-conditioner, control method and computer-readable storage Medium.
To realize above-mentioned at least one purpose, according to the first aspect of the invention, it is proposed that a kind of motor of compressor around Group connection control circuit, including：Controller, the first to the 6th relay and machine winding；Wherein, the first end of the first relay It is connected to the U phases input terminal of machine winding, second end is connected to the W phase output terminals of machine winding, third end is connected to controller The first control terminal and the 4th termination the first supply voltage；The V phases that the first end of second relay is connected to machine winding are defeated Enter end, second end is connected to the U phase output terminals of machine winding, third end is connected to the second control terminal and the 4th end of controller Connect the first supply voltage；The first end of third relay is connected to the W phases input terminal of machine winding, second end be connected to motor around The V phase output terminals of group, third end are connected to the third control terminal and the 4th the first supply voltage of termination of controller；4th relay The first end of device is connected to the U phase output terminals of machine winding, second end is respectively connected to the second end and the 6th of the 5th relay The second end of relay, third end are connected to the 4th control terminal and the 4th the second supply voltage of termination of controller；5th after The first end of electric appliance is connected to the V phase output terminals of machine winding, second end is respectively connected to the second end and of the 4th relay The second end of six relays, third end are connected to the 5th control terminal and the 4th the second supply voltage of termination of controller；6th The first end of relay is connected to the W phase output terminals of machine winding, second end be respectively connected to the 4th relay second end and The second end of 5th relay, third end are connected to the 6th control terminal and the 4th the second supply voltage of termination of controller.
In the technical scheme, by first to third relay first end respectively with the U phases of machine winding, V phases and W phases Input terminal it is one-to-one be attached, second end respectively with the input terminal of the W phases of machine winding, U phases and V phases is one-to-one is connected Connect, third end respectively with the first control terminal of controller to third control terminal it is one-to-one be attached, the 4th end is commonly connected to First supply voltage；By the first end of the 4th to the 6th relay output end one with the U phases of machine winding, V phases and W phases respectively Be attached to one, second end is attached mutually, third end respectively with the 4th control terminal to the 6th control terminal one of controller Be attached to one, the 4th end is commonly connected to the second supply voltage, by by controller, the first to the 6th relay and motor Winding is attached using aforesaid way, and the actuation of controller control relay can be made to reach machine winding in star with disconnection The purpose switched between type connection and triangular form connection reduces user to promote frequency-variable air-conditioner in the APF values of full frequency band Use the cost of air-conditioning equipment.
In the above-mentioned technical solutions, it is preferable that the machine winding connection control circuit of compressor further includes：Power factor school Positive module, storage capacitor, the first sampling resistor, the second sampling resistor and three-phase inverting circuit；Wherein, power factor correction module Output end be parallel with storage capacitor and the first sampling resistor and the first sampling resistor, the second sampling resistor and three-phase inversion Circuit is sequentially connected in series, and three-phase inverting circuit is connected to machine winding.
In the technical scheme, in order to improve the utilization rate of electrical of compressor, to achieve the purpose that save electric energy, the control Circuit further includes power factor correction module, in order to meet the needs of machine winding is to operating voltage, the input terminal of machine winding It is connected with three-phase inverting circuit, specifically power factor correction module, storage capacitor, the first sampling resistor and three-phase inverting circuit It is connected in parallel successively and the second sampling resistor, the first sampling resistor and three-phase inverting circuit is connected in series with.
In any of the above-described technical solution, it is preferable that three-phase inverting circuit includes：Bridge under bridge arm IGBT pipes, U phases in U phases Bridge arm IGBT pipes, V phase lower bridge arms IGBT are managed on arm IGBT pipes, V phases, bridge arm IGBT pipes and W phase lower bridge arms IGBT are managed in W phases；Its In, the first end of bridge arm IGBT pipes is divided in the first end, W phases of bridge arm IGBT pipes in the first end, V phases of bridge arm IGBT pipes in U phases It is not connected to the first sampling resistor；The second end of bridge arm IGBT pipes is connected to the first end of U phase lower bridge arm IGBT pipes, V phases in U phases The second end of upper bridge arm IGBT pipes is connected to the first end of V phase lower bridge arm IGBT pipes, the second end connection of bridge arm IGBT pipes in W phases To the first end of W phase lower bridge arm IGBT pipes；The second end of U phase lower bridge arm IGBT pipes, second end, the W phases of V phase lower bridge arm IGBT pipes The second end of lower bridge arm IGBT pipes is respectively connected to the second sampling resistor；The U phase input terminals of machine winding are respectively connected in U phases The first end of the second end and U phase lower bridge arm IGBT pipes of bridge arm IGBT pipes, the V phase input terminals of machine winding are respectively connected to V phases The first end of the second end and V phase lower bridge arm IGBT pipes of upper bridge arm IGBT pipes, the W phase input terminals of machine winding are respectively connected to W The first end of the second end of bridge arm IGBT pipes and W phase lower bridge arm IGBT pipes in phase.
In the technical scheme, the first end of the upper bridge arm IGBT pipes of U phases, V phases and W phases is respectively connected to the first sampling Resistance, upper bridge arm IGBT pipes second end respectively with the first end of corresponding lower bridge arm IGBT pipes is one-to-one is attached；By U The second end of the lower bridge arm IGBT pipes of phase, V phases and W phases is respectively connected to the second sampling resistor；By the U of machine winding output end Phase, V phases and W phases be respectively connected to the upper bridge arm IGBT pipes of corresponding U phases in three-phase inverting circuit, V phases and W phases second end and The first end of lower bridge arm IGBT pipes, by managing bridge arm IGBT in U phases, U phase lower bridge arms IGBT is managed, bridge arm IGBT pipes, V in V phases Bridge arm IGBT pipes and W phase lower bridge arms IGBT pipes and the output end of machine winding use aforesaid way on phase lower bridge arm IGBT pipes, W phases Be attached, three-phase inverting circuit enable to provide its required three-phase alternating voltage for machine winding, ensure that motor around The normal operation of group.
In any of the above-described technical solution, it is preferable that the machine winding connection control circuit of compressor further includes：Rotating speed is adopted Egf block is connected to controller, the rotating speed for acquiring compressor；Current sampling circuit is connected to controller, for acquiring stream Electric current through the second sampling resistor is using the operating current as compressor；Voltage sampling circuit is connected to controller, for acquiring The voltage at the first sampling resistor both ends is using any phase back-emf voltage as machine winding；Pressure at expulsion detection module, even It is connected to controller, the pressure at expulsion for detecting compressor.
In the technical scheme, it in order to get the operation conditions of compressor, is also provided in the control circuit Rotating speed sampling module, current sampling circuit, voltage sampling circuit and pressure at expulsion detection module, are connected to controller, wherein Rotating speed sampling module is used to acquire the rotating speed of compressor, and current sampling circuit is used to acquire the electric current for flowing through the second sampling resistor, Using collected electric current as the operating current of compressor, voltage sampling circuit is used to acquire the electricity at the first sampling resistor both ends Pressure, using collected voltage as the back-emf voltage of any phase of machine winding, pressure at expulsion detection module is pressed for detecting The pressure at expulsion of contracting machine, the acquisition of rotating speed, electric current, voltage and pressure at expulsion when by compressor operating are machine winding The switching of connection type provides foundation.
In any of the above-described technical solution, it is preferable that controller is configured as：According to operating current or pressure at expulsion or appoint One phase back-emf voltage control motor unit switches between wye connection and triangular form connection.
In the technical scheme, controller is according to the operating current or pressure at expulsion of the compressor got or any opposite EMF voltage controls the disconnection and actuation of relay, realizes the compressor electric motor winding in wye connection and triangular form with this Switch between connection, by the connection for controlling machine winding according to the operation conditions of compressor so that the work of compressor is imitated Rate is effectively promoted, and then saves the consumption of electric energy, reduces the cost that user uses air-conditioning.
In any of the above-described technical solution, it is preferable that when the first relay, the second relay and third relay are in disconnected When open state and the 4th relay, the 5th relay and the 6th relay are in attracting state, machine winding is wye connection； When the first relay, the second relay and third relay are in attracting state and the 4th relay, the 5th relay and When six relays are off, machine winding is triangular form connection.
In the technical scheme, when showing that machine winding uses wye connection according to the compressor operating situation got, It can guarantee compressor Effec-tive Function, then controlling the first relay, the second relay and third relay by controller disconnects, and controls The 4th relay, the 5th relay and the 6th relay is made to be attracted；When machine winding use triangular form connection, can guarantee compressor When Effec-tive Function, controller controls the first relay, the second relay and third relay and is attracted, and the 4th relay of control, 5th relay and the 6th relay disconnect, by relay disconnection and attracting mode, to realize the switching of machine winding connection, Make it possible to through smaller cost, to achieve the purpose that improve compressor operating efficiency.
In any of the above-described technical solution, it is preferable that the material of the forceful electric power contact of the first to the 6th relay is closed for tungsten copper Gold or silver tungsten.
In the technical scheme, it is contemplated that compressor is in operating status and the forceful electric power contact of each relay is attracted When, prodigious peak point current is will produce, the forceful electric power contact of tungsten-copper alloy or silver tungsten as relay specifically may be used, with Ensure that relay is not damaged, to extend the service life of product when machine winding carries out connection switching.
According to the second aspect of the invention, a kind of frequency-variable air-conditioner is provided, including：Such as the technology of above-mentioned first aspect The machine winding connection control circuit of the compressor of any one of scheme.
According to the third aspect of the invention we, it is also proposed that a kind of control method, for the technical side such as above-mentioned first aspect The machine winding connection control circuit of the compressor of any one of case, this method include：Compressor is obtained under current working Default operational factor；Controlling the first to the 6th respective folding condition of relay according to the value range of default operational factor makes electricity Machine winding switches between wye connection and triangular form connection.
In the technical scheme, controller is according to the default operational factor of the compressor got, and then according to getting Default operational factor control the disconnection and actuation of relay, realize the compressor electric motor winding in wye connection and three with this Switch between angle-style connection, by the connection for controlling machine winding according to the operation conditions of compressor so that the work of compressor It is effectively promoted as efficiency, and then saves the consumption of electric energy, reduce the cost that user uses air-conditioning equipment.
In the above-mentioned technical solutions, it is preferable that when default operational factor is compressor operating electric current, according to default operation The value range of parameter, which controls the first to the 6th respective folding condition of relay, makes machine winding in wye connection and triangular form The step of switching between connection specifically includes：When machine winding is operated in triangular form connection and detects compressor operating electric current When less than the first predetermined current, the first relay of control, the second relay and third relay enter off-state and the 4th Relay, the 5th relay and the 6th relay enter attracting state, so that machine winding switches into star by triangular form connection Type connection；When machine winding is operated in wye connection and detects that compressor operating electric current is more than the second predetermined current, control First relay, the second relay and third relay enter attracting state and the 4th relay, the 5th relay and the 6th Relay enters off-state, so that machine winding switches into triangular form connection by wye connection；Wherein, the second predetermined current More than the first predetermined current, and the rotating speed that the first predetermined current is compressor reaches corresponding compressor operating electricity when preset rotation speed Stream.
In the technical scheme, when according to the operating current of compressor the first to the 6th respective folding shape of relay of control When state makes machine winding switch between wye connection and triangular form connection, in order to ensure the accuracy of switching, controlling The first predetermined current is provided in device, which is that the rotating speed of compressor reaches corresponding compressor when preset rotation speed Operating current, when machine winding is run using triangular form connection, and the operating current of the compressor detected is less than first Predetermined current, then illustrate compressor it is current operation load it is smaller, and then controller control the first relay, the second relay and Third relay disconnects, and controls the 4th relay, the 5th relay and the 6th relay and be attracted, and makes machine winding by triangular form Connection switches into wye connection, relatively early to reduce the fortune of compressor into weak magnetic area to prevent compressor when low speed is run Line efficiency；When the operating current of compressor fluctuates up and down around the first predetermined current in order to prevent so that reciprocal switch motor around The connection of group, causes compressor damage, and the second predetermined current more than the first predetermined current is provided in controller, works as motor Winding is run using wye connection, and the operating current of the compressor detected is more than the second predetermined current, then illustrates to compress The current operation load of machine is larger, and then controller controls the first relay, the second relay and third relay and is attracted, and controls It makes the 4th relay, the 5th relay and the 6th relay to disconnect, so that machine winding is switched into triangular form by wye connection and connect Method, it is later that the operational efficiency of compressor is reduced into weak magnetic area to prevent compressor in high-speed cruising, and pass through control Machine winding wye connection and delta-connected mutual conversion, can effectively be promoted frequency-variable air-conditioner full frequency band APF Value.
In any of the above-described technical solution, it is preferable that when default operational factor is Compressor Discharge Pressure, according to default The value range of operating parameter, which controls the first to the 6th respective folding condition of relay, makes machine winding in wye connection and three The step of switching between angle-style connection, specifically includes：When machine winding is operated in triangular form connection and detects compressor air-discharging When pressure is less than the first preset pressure, the first relay of control, the second relay and third relay enter off-state and 4th relay, the 5th relay and the 6th relay enter attracting state, so that machine winding is switched by triangular form connection Enter wye connection；When machine winding is operated in wye connection and detects that Compressor Discharge Pressure is more than the second preset pressure, Control the first relay, the second relay and third relay enter attracting state and the 4th relay, the 5th relay and 6th relay enters off-state, so that machine winding switches into triangular form connection by wye connection；Wherein, second is default Pressure is more than the first preset pressure, and the rotating speed that the first preset pressure is compressor reaches corresponding compressor row when preset rotation speed Atmospheric pressure.
In the technical scheme, respective when controlling the first to the 6th relay according to the Compressor Discharge Pressure of compressor When folding condition makes machine winding switch between wye connection and triangular form connection, in order to ensure the accuracy of switching, The first preset pressure is provided in controller, which is that the rotating speed of compressor reaches corresponding when preset rotation speed Compressor Discharge Pressure, when machine winding is run using triangular form connection, and the pressure at expulsion of the compressor detected is less than First preset pressure then illustrates that the current operation load of compressor is smaller, and then controller controls the first relay, the second relay Device and third relay disconnect, and control the 4th relay, the 5th relay and the 6th relay and be attracted, and make machine winding by three Angle-style connection switches into wye connection, relatively early to reduce compressor into weak magnetic area to prevent compressor when low speed is run Operational efficiency；When the pressure at expulsion of compressor fluctuates up and down around the first preset pressure in order to prevent so that reciprocal switching electricity The connection of machine winding, causes compressor damage, and the second preset pressure more than the first preset pressure is provided in controller, when Machine winding is run using wye connection, and the pressure at expulsion of the compressor detected is more than the second preset pressure, then illustrates The current operation load of compressor is larger, and then controller controls the first relay, the second relay and third relay and is attracted, And control the 4th relay, the 5th relay and the 6th relay and disconnect, so that machine winding is switched into triangle by wye connection Type connection, it is later that the operational efficiency of compressor is reduced into weak magnetic area to prevent compressor in high-speed cruising, and pass through Machine winding wye connection and delta-connected mutual conversion are controlled, can effectively promote frequency-variable air-conditioner in full frequency band APF values.
In any of the above-described technical solution, it is preferable that when any phase back-emf that default operational factor is machine winding When voltage, controlling the first to the 6th respective folding condition of relay according to the value range of default operational factor makes machine winding The step of switching between wye connection and triangular form connection, specifically includes：When machine winding is operated in triangular form connection and inspection When measuring any phase back-emf voltage less than the first predeterminated voltage, the first relay of control, the second relay and third relay Device enters off-state and the 4th relay, the 5th relay and the 6th relay enters attracting state, so that machine winding Wye connection is switched by triangular form connection；When machine winding is operated in wye connection and detects any phase back-emf electricity When pressure is more than the second predeterminated voltage, the first relay of control, the second relay and third relay enter attracting state and the Four relays, the 5th relay and the 6th relay enter off-state, so that machine winding switches into three by wye connection Angle-style connection；Wherein, the second predeterminated voltage is more than the first predeterminated voltage, and the rotating speed that the first predeterminated voltage is compressor reaches pre- If machine winding corresponding any phase back-emf voltage when rotating speed.
In the technical scheme, when according to any phase back-emf voltage of machine winding the first to the 6th relay of control When respective folding condition makes machine winding switch between wye connection and triangular form connection, in order to ensure the standard of switching True property is provided with the first predeterminated voltage, when which is that the rotating speed of compressor reaches preset rotation speed in controller Corresponding any phase back-emf voltage, when machine winding is run using triangular form connection, and any opposite electricity detected EMF voltage be less than the first predeterminated voltage, then illustrate compressor it is current operation load it is smaller, and then controller control first after Electric appliance, the second relay and third relay disconnect, and control the 4th relay, the 5th relay and the 6th relay and be attracted, Machine winding is set to switch into wye connection by triangular form connection, it is relatively early to enter weak magnetic to prevent compressor when low speed is run Area and the operational efficiency for reducing compressor；Any phase back-emf voltage fluctuates up and down around the first predeterminated voltage in order to prevent When so that the connection of reciprocal switch motor winding causes compressor damage, is provided in controller and is more than the first predeterminated voltage The second predeterminated voltage, when machine winding is run using wye connection, and the exhaust voltage of the compressor detected is more than the Two predeterminated voltages then illustrate that the current operation load of compressor is larger, and then controller controls the first relay, the second relay It is attracted with third relay, and controls the 4th relay, the 5th relay and the 6th relay and disconnect, make machine winding by star-like Connection switches into triangular form connection, later to reduce compressor into weak magnetic area to prevent compressor in high-speed cruising Operational efficiency, and by controlling machine winding wye connection and delta-connected mutual conversion, can effectively promote frequency conversion APF value of the air-conditioning equipment in full frequency band.
According to the fourth aspect of the invention, a kind of control device is provided, frequency-variable air-conditioner, control device packet are used for It includes：Processor；Memory for storing processor-executable instruction, wherein processor is used to execute to store in memory The step of control method as described in any one of technical solution of the above-mentioned third aspect is realized when executable instruction.
According to the fifth aspect of the invention, a kind of computer readable storage medium is provided, computer journey is stored thereon with Sequence realizes the control method as described in any one of technical solution of the above-mentioned third aspect when computer program is executed by processor The step of.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description Obviously, or practice through the invention is recognized.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination following accompanying drawings to embodiment Obviously and it is readily appreciated that, wherein：
Fig. 1 shows the principle schematic of the machine winding connection control circuit of the compressor of the embodiment of the present invention；
Fig. 2 shows the flow diagrams of the control method of the embodiment of the present invention；
Fig. 3 shows the schematic diagram of the voltage of the specific embodiment of the invention and relationship of rotating speed, efficiency and rotation speed relation；
Fig. 4 shows the schematic block diagram of the control device of the embodiment of the present invention.
Specific implementation mode
To better understand the objects, features and advantages of the present invention, below in conjunction with the accompanying drawings and specific real Mode is applied the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application Feature in example and embodiment can be combined with each other.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also To be implemented different from other modes described here using other, therefore, protection scope of the present invention is not by described below Specific embodiment limitation.
Fig. 1 shows the principle schematic of the machine winding connection control circuit of the compressor of the embodiment of the present invention.
As shown in Figure 1, the machine winding connection control circuit of compressor according to the ... of the embodiment of the present invention, specifically includes：Control Device 10 processed, the first relay 201, the second relay 202, third relay 203, the 4th relay 204, the 5th relay 205 With the 6th relay 206 and machine winding 30.
Wherein, the first end of the first relay 201 is connected to the U phases input terminal of machine winding 30, second end is connected to electricity The W phase output terminals of machine winding 30, third end are connected to the first control terminal 101 and the 4th termination the first power supply electricity of controller 10 Pressure；The first end of second relay 202 is connected to the V phases input terminal of machine winding 30, second end is connected to the U of machine winding 30 The second control terminal 102 and the 4th that phase output terminal, third end are connected to controller 10 terminates the first supply voltage；Third relay The first end of device 203 is connected to the W phases input terminal of machine winding 30, second end is connected to the V phase output terminals of machine winding 30, The third control terminal 103 and the 4th that three ends are connected to controller 10 terminates the first supply voltage；The first of 4th relay 204 End is connected to the U phase output terminals of machine winding 30, second end is respectively connected to the second end and the 6th relay of the 5th relay 205 The 4th control terminal 104 and the 4th that the second end of device 206, third end are connected to controller 10 terminates the second supply voltage 208； The first end of 5th relay 205 is connected to the V phase output terminals 305 of machine winding 30, second end is respectively connected to the 4th relay The second end of device 204 and the second end of the 6th relay 206, third end be connected to controller 10 the 5th control terminal 105 and 4th the second supply voltage of termination；The first end of 6th relay 206 is connected to the W phase output terminals 306, second of machine winding 30 End is respectively connected to the second end of the 4th relay 204 and the second end of the 5th relay 205, third end are connected to controller 10 The 6th control terminal 106 and the 4th terminate the second supply voltage.
In this embodiment, by the first end of the first relay 201 to third relay 203 respectively with machine winding 30 The input terminal of U phases, V phases and W phases is one-to-one to be attached, the second end input with the W phases, U phases and V phases of machine winding 30 respectively Hold it is one-to-one be attached, third end respectively with the first control terminal 101 of controller 10 to 103 one-to-one progress of third control terminal Connection, the 4th end are commonly connected to the first supply voltage 207；By the first end of 204 to the 6th relay 206 of the 4th relay point Not with the output end of the U phases of machine winding 30, V phases and W phases it is one-to-one be attached, second end is attached mutually, third end Respectively with the 4th of controller 10 104 ends of control to the 6th control terminal 106 it is one-to-one be attached, the 4th end is commonly connected to the Two supply voltages 208, it is above-mentioned by using controller 10,201 to the 6th relay 206 of the first relay and machine winding 30 Mode is attached, and the actuation that controller 10 controls inverter 20 can be made to reach machine winding 30 in wye connection with disconnection The purpose switched between triangular form connection reduces user and uses sky to promote frequency-variable air-conditioner in the APF values of full frequency band Adjust the cost of equipment.
Further, in the above-described embodiments, as shown in Figure 1, the first supply voltage and the second supply voltage preferably may be used Think 12V.
Further, in the above-described embodiments, the machine winding connection control circuit of compressor further includes：Power factor school Positive module 40, storage capacitor 50, the first sampling resistor 60, the second sampling resistor 70 and three-phase inverting circuit 80；Wherein, power because The output end of number correction module 40 is parallel with storage capacitor 50 and the first sampling resistor 60 and the first sampling resistor 60, second Sampling resistor 70 and three-phase inverting circuit 80 are sequentially connected in series, and three-phase inverting circuit 80 is connected to machine winding 30.
In this embodiment, in order to improve the utilization rate of electrical of compressor, to achieve the purpose that save electric energy, control electricity Road further includes power factor correction module 40, in order to meet the needs of machine winding 30 is to operating voltage, machine winding 30 it is defeated Enter end and be connected with three-phase inverting circuit 80, specifically power factor correction module 40, storage capacitor 50,60 and of the first sampling resistor Three-phase inverting circuit 80 is connected in parallel successively and the second sampling resistor 70, the first sampling resistor 60 and three-phase inverting circuit 80 It is connected in series with.
Further, in the above-described embodiments, three-phase inverting circuit 80 includes：Bridge under bridge arm IGBT pipes 801, U phases in U phases Bridge arm IGBT pipes 803 on arm IGBT pipes 802, V phases, V phase lower bridge arm IGBT pipes 804, bridge under bridge arm IGBT pipes 805 and W phases in W phases Arm IGBT pipes 806；Wherein, in U phases in the first end, V phases of bridge arm IGBT pipes 801 in the first end, W phases of bridge arm IGBT pipes 803 The first end of bridge arm IGBT pipes 805 is respectively connected to the first sampling resistor 60；The second end connection of bridge arm IGBT pipes 801 in U phases To the first end of U phase lower bridge arm IGBT pipes 802, the second end of bridge arm IGBT pipes 803 is connected to V phase lower bridge arms IGBT pipes in V phases 804 first end, the second end of bridge arm IGBT pipes 805 is connected to the first end of W phase lower bridge arm IGBT pipes 806 in W phases；Under U phases The second end of bridge arm IGBT pipes 802, the second end of V phase lower bridge arm IGBT pipes 804, the second end of W phase lower bridge arm IGBT pipes 806 point It is not connected to the second sampling resistor 70；The U phases input terminal 301 of machine winding 30 is respectively connected to bridge arm IGBT pipes 801 in U phases The first end of second end and U phase lower bridge arm IGBT pipes 802, the V phases input terminal 302 of machine winding 30 are respectively connected to bridge in V phases The W phases input terminal 303 of the first end of the second end and V phase lower bridge arm IGBT pipes 804 of arm IGBT pipes 803, machine winding 30 is distinguished It is connected to the first end of the second end of bridge arm IGBT pipes 805 and W phase lower bridge arm IGBT pipes 806 in W phases.
In this embodiment, the first end of the upper bridge arm IGBT pipes of U phases, V phases and W phases is respectively connected to the first sampling electricity Resistance 60, the second ends of upper bridge arm IGBT pipes respectively with the first end of corresponding lower bridge arm IGBT pipes is one-to-one is attached；By U The second end of the lower bridge arm IGBT pipes of phase, V phases and W phases is respectively connected to the second sampling resistor 70；By 30 output end of machine winding U phases, V phases be respectively connected to W phases corresponding U phases in three-phase inverting circuit 80, V phases and W phases upper bridge arm IGBT pipes The first end at two ends and lower bridge arm IGBT pipes, by will be in bridge arm IGBT pipes 801 in U phases, U phase lower bridge arm IGBT pipes 802, V phases Bridge arm IGBT pipes 803, V phase lower bridge arm IGBT pipes 804, bridge arm IGBT pipes 805 and W phase lower bridge arm IGBT pipes 806 and motor in W phases The output end of winding 30 is attached using aforesaid way, and it is that machine winding 30 is provided needed for it to enable three-phase inverting circuit 80 The three-phase alternating voltage wanted ensure that the normal operation of machine winding 30.
Further, in the above-described embodiments, the machine winding connection control circuit of compressor further includes：Rotating speed samples mould Block 90, current sampling circuit 100, voltage sampling circuit 110 and pressure at expulsion detection module 120.
Wherein, rotating speed sampling module 90 is connected to controller 10, the rotating speed for acquiring compressor；Current sampling circuit 100, it is connected to controller 10, the electric current of the second sampling resistor 70 is flowed through using the operating current as compressor for acquiring；Electricity Sample circuit 110 is pressed, controller is connected to, for acquiring the voltage at 60 both ends of the first sampling resistor using as machine winding 30 Any phase back-emf voltage；Pressure at expulsion detection module 120 is connected to controller 10, the exhaust pressure for detecting compressor Power.
In this embodiment, it in order to get the operation conditions of compressor, is also provided with and turns in the control circuit Fast sampling module 90, current sampling circuit 100, voltage sampling circuit 110 and pressure at expulsion detection module 120, are connected to control Device 10 processed, wherein rotating speed sampling module 90 are used to acquire the rotating speed of compressor, and current sampling circuit 100 flows through second for acquiring The electric current of sampling resistor 70, using collected electric current as the operating current of compressor, voltage sampling circuit 110 is for acquiring the The voltage at one sampling resistor, 60 both ends, using collected voltage as the back-emf voltage of 30 any phase of machine winding, exhaust Pressure detecting module 120 is used to detect the pressure at expulsion of compressor, rotating speed, electric current, voltage when by compressor operating and The acquisition of pressure at expulsion, the switching for 30 connection type of machine winding provide foundation.
Further, in the above-described embodiments, controller 10 is configured as：According to operating current or pressure at expulsion or any Phase back-emf voltage control motor unit 30 switches between wye connection and triangular form connection.
In this embodiment, controller 10 is according to the operating current or pressure at expulsion of the compressor got or any opposite EMF voltage controls the disconnection and actuation of relay, realizes the compressor electric motor winding 30 in wye connection and triangle with this Switch between type connection, by the connection for controlling machine winding 30 according to the operation conditions of compressor so that the work of compressor It is effectively promoted as efficiency, and then saves the consumption of electric energy, reduce the cost that user uses air-conditioning.
Further, in the above-described embodiments, when the first relay 201, the second relay 202 and third relay 203 It is off and when the 4th relay 204, the 5th relay 205 and the 6th relay 206 are in attracting state, motor Winding 30 is wye connection；When the first relay 201, the second relay 202 and third relay 203 be in attracting state and When 4th relay 204, the 5th relay 205 and the 6th relay 206 are off, machine winding 30 connects for triangular form Method.
In this embodiment, when obtaining machine winding 30 using wye connection according to the compressor operating situation got, It can guarantee compressor Effec-tive Function, then the first relay 201, the second relay 202 and third relay controlled by controller 10 203 disconnect, and control the 4th relay 204, the 5th relay 205 and the 6th relay 206 and be attracted；When machine winding 30 uses Triangular form connection, when can guarantee compressor Effec-tive Function, controller 10 controls the first relay 201, the second relay 202 and the Three relays are attracted 203, and control the 4th relay 204, the 5th relay 205 and the 6th relay 206 and disconnect, and pass through relay Device disconnects and attracting mode, to realize the switching of 30 connection of machine winding, enabling by smaller cost, is improved to reach The purpose of compressor operating efficiency.
Further, in the above-described embodiments, the material of the forceful electric power contact of 201 to the 6th relay 206 of the first relay For tungsten-copper alloy or silver tungsten.
In this embodiment, it is contemplated that when compressor the is in operating status and forceful electric power contact of each relay is attracted When, prodigious peak point current is will produce, the forceful electric power contact of tungsten-copper alloy or silver tungsten as relay 20 specifically may be used, To ensure that relay 20 is not damaged, to extend the service life of product when machine winding 30 carries out connection switching.
Specifically, when machine winding connection switches over, since compressor is in operating status, forceful electric power contact is being attracted Moment, prodigious peak point current is will produce, at this time, it may be necessary to which relay itself has the energy of arc-suppression function or resistance to peak point current Power as the material of forceful electric power contact is formed using tungsten-copper alloy or silver tungsten, or reduces the sucting speed of relay and other outer The arc-suppression circuit etc. in portion.
Further, in the above-described embodiments, as shown in Figure 1, the machine winding connection control circuit of the compressor is also wrapped Power module 130 is included, which can specifically take alternating current 220V AC powers；And further include for by power supply mould The alternating voltage that block 130 exports is converted to the rectification module 140 that DC voltage supply power factor correction module 40 uses.
As the embodiment of the present invention, it is also proposed that a kind of frequency-variable air-conditioner, including described in any of the above-described embodiment The machine winding connection control circuit of compressor.
Fig. 2 shows the flow diagrams of the control method of the embodiment of the present invention.
As shown in Fig. 2, control method according to the ... of the embodiment of the present invention, for appointing in the technical solution such as above-mentioned first aspect The machine winding connection control circuit of one compressor, then the step of this method specifically include：
Step S202 obtains default operational factor of the compressor under current working.
Specifically, default operational factor include but not limited to the operating current of compressor, machine winding any opposite electricity The pressure at expulsion of EMF voltage and compressor.
Step S204 controls the first to the 6th respective folding condition of relay according to the value range of default operational factor Machine winding is set to switch between wye connection and triangular form connection.
In this embodiment, controller is according to the default operational factor of the compressor got, and then according to getting Default operational factor controls the disconnection and actuation of relay, realizes the compressor electric motor winding in wye connection and triangle with this Switch between type connection, by the connection for controlling machine winding according to the operation conditions of compressor so that the work of compressor Efficiency is effectively promoted, and then saves the consumption of electric energy, reduces the cost that user uses air-conditioning equipment.
Further, in the above-described embodiments, when default operational factor is compressor operating electric current, according to default operation The value range of parameter, which controls the first to the 6th respective folding condition of relay, makes machine winding in wye connection and triangular form The step of switching between connection specifically includes：When machine winding is operated in triangular form connection and detects compressor operating electric current When less than the first predetermined current, the first relay of control, the second relay and third relay enter off-state and the 4th Relay, the 5th relay and the 6th relay enter attracting state, so that machine winding switches into star by triangular form connection Type connection；When machine winding is operated in wye connection and detects that compressor operating electric current is more than the second predetermined current, control First relay, the second relay and third relay enter attracting state and the 4th relay, the 5th relay and the 6th Relay enters off-state, so that machine winding switches into triangular form connection by wye connection；Wherein, the second predetermined current More than the first predetermined current, and the rotating speed that the first predetermined current is compressor reaches corresponding compressor operating electricity when preset rotation speed Stream.
In this embodiment, when according to the operating current of compressor the first to the 6th respective folding condition of relay of control When machine winding being made to switch between wye connection and triangular form connection, in order to ensure the accuracy of switching, in controller It is inside provided with the first predetermined current, which is that the rotating speed of compressor reaches corresponding compressor work when preset rotation speed Make electric current, when machine winding is run using triangular form connection, and the operating current of the compressor detected is less than first in advance If electric current, then illustrate that the current operation load of compressor is smaller, and then controller controls the first relay, the second relay and the Three relays disconnect, and control the 4th relay, the 5th relay and the 6th relay and be attracted, and machine winding is made to be connect by triangular form Method switches into wye connection, relatively early to reduce the operation of compressor into weak magnetic area to prevent compressor when low speed is run Efficiency；When the operating current of compressor fluctuates up and down around the first predetermined current in order to prevent so that reciprocal switch motor winding Connection, cause compressor damage, in controller be provided with more than the first predetermined current the second predetermined current, when motor around Group is run using wye connection, and the operating current of the compressor detected is more than the second predetermined current, then illustrates compressor Current operation load is larger, and then controller controls the first relay, the second relay and third relay and is attracted, and controls 4th relay, the 5th relay and the 6th relay disconnect, and machine winding is made to switch into triangular form connection by wye connection, It is later to reduce the operational efficiency of compressor into weak magnetic area to prevent compressor in high-speed cruising, and pass through and control electricity Machine winding wye connection and delta-connected mutual conversion, can effectively be promoted frequency-variable air-conditioner full frequency band APF values.
Further, in the above-described embodiments, when default operational factor is Compressor Discharge Pressure, according to default operation The value range of parameter, which controls the first to the 6th respective folding condition of relay, makes machine winding in wye connection and triangular form The step of switching between connection specifically includes：When machine winding is operated in triangular form connection and detects Compressor Discharge Pressure When less than the first preset pressure, the first relay of control, the second relay and third relay enter off-state and the 4th Relay, the 5th relay and the 6th relay enter attracting state, so that machine winding switches into star by triangular form connection Type connection；When machine winding is operated in wye connection and detects that Compressor Discharge Pressure is more than the second preset pressure, control First relay, the second relay and third relay enter attracting state and the 4th relay, the 5th relay and the 6th Relay enters off-state, so that machine winding switches into triangular form connection by wye connection；Wherein, the second preset pressure More than the first preset pressure, and the rotating speed that the first preset pressure is compressor reaches corresponding compressor air-discharging pressure when preset rotation speed Power.
In this embodiment, when being controlled according to the Compressor Discharge Pressure of compressor, the first to the 6th relay is respective to be opened When conjunction state makes machine winding switch between wye connection and triangular form connection, in order to ensure the accuracy of switching, The first preset pressure is provided in controller, which is that the rotating speed of compressor reaches corresponding pressure when preset rotation speed Contracting machine pressure at expulsion, when machine winding is run using triangular form connection, and the pressure at expulsion of the compressor detected is less than the One preset pressure then illustrates that the current operation load of compressor is smaller, and then controller controls the first relay, the second relay It is disconnected with third relay, and controls the 4th relay, the 5th relay and the 6th relay and be attracted, make machine winding by triangle Type connection switches into wye connection, relatively early to reduce compressor into weak magnetic area to prevent compressor when low speed is run Operational efficiency；When the pressure at expulsion of compressor fluctuates up and down around the first preset pressure in order to prevent so that reciprocal switch motor The connection of winding, causes compressor damage, and the second preset pressure more than the first preset pressure is provided in controller, works as electricity Machine winding is run using wye connection, and the pressure at expulsion of the compressor detected is more than the second preset pressure, then illustrates to press The current operation load of contracting machine is larger, and then controller controls the first relay, the second relay and third relay and is attracted, and It controls the 4th relay, the 5th relay and the 6th relay to disconnect, machine winding is made to switch into triangular form by wye connection Connection, it is later that the operational efficiency of compressor is reduced into weak magnetic area to prevent compressor in high-speed cruising, and pass through control Machine winding wye connection processed and delta-connected mutual conversion, can effectively promote frequency-variable air-conditioner in full frequency band APF values.
Further, in the above-described embodiments, when any phase back-emf voltage that default operational factor is machine winding When, controlling the first to the 6th respective folding condition of relay according to the value range of default operational factor makes machine winding in star The step of switching between type connection and triangular form connection, specifically includes：When machine winding is operated in triangular form connection and detects When any phase back-emf voltage is less than the first predeterminated voltage, the first relay of control, the second relay and third relay into Enter off-state and the 4th relay, the 5th relay and the 6th relay enters attracting state so that machine winding is by three Angle-style connection switches into wye connection；When machine winding is operated in wye connection and detects that any phase back-emf voltage is big When the second predeterminated voltage, the first relay of control, the second relay and third relay enter attracting state and the 4th after Electric appliance, the 5th relay and the 6th relay enter off-state, so that machine winding switches into triangular form by wye connection Connection；Wherein, the second predeterminated voltage is more than the first predeterminated voltage, and the rotating speed that the first predeterminated voltage is compressor reaches default and turns Machine winding corresponding any phase back-emf voltage when fast.
In this embodiment, each when controlling the first to the 6th relay according to any phase back-emf voltage of machine winding From folding condition so that machine winding is switched between wye connection and triangular form connection when, in order to ensure switching it is accurate Property, it is provided with the first predeterminated voltage in controller, which is when the rotating speed of compressor reaches preset rotation speed pair Any phase back-emf voltage answered when machine winding is run using triangular form connection, and detects any opposite electronic Gesture voltage is less than the first predeterminated voltage, then illustrates that the current operation load of compressor is smaller, and then controller controls the first relay Device, the second relay and third relay disconnect, and control the 4th relay, the 5th relay and the 6th relay and be attracted, and make Machine winding switches into wye connection by triangular form connection, relatively early to enter weak magnetic area to prevent compressor when low speed is run And reduce the operational efficiency of compressor；When any phase back-emf voltage fluctuates up and down around the first predeterminated voltage in order to prevent, So that the connection of reciprocal switch motor winding, causes compressor damage, it is provided with more than the first predeterminated voltage in controller Second predeterminated voltage, when machine winding using wye connection run, and the exhaust voltage of the compressor detected be more than second Predeterminated voltage, then illustrate compressor it is current operation load it is larger, and then controller control the first relay, the second relay and Third relay is attracted, and is controlled the 4th relay, the 5th relay and the 6th relay and disconnected, and machine winding is made to be connect by star-like Method switches into triangular form connection, to prevent compressor in high-speed cruising, the later fortune that compressor is reduced into weak magnetic area Line efficiency, and by controlling machine winding wye connection and delta-connected mutual conversion, can effectively promote frequency conversion sky Adjust equipment in the APF values of full frequency band.
Fig. 3 shows the schematic diagram of the voltage of the specific embodiment of the invention and relationship of rotating speed, efficiency and rotation speed relation.
As shown in figure 3, for the three-phase permanent magnet synchronous motor of wye connection, when compressor start to rotating speed increases to N0, Busbar voltage reaches given value U, improves compressor rotary speed by weak magnetic at this time, until compressor rotary speed reaches N1, this mistake The APF values of wye connection are higher than delta-connection in journey, this process thinks that the load of system is lighter.As rotating speed increases to N2, Then APF values delta-connection is higher than wye connection, and N2 increases to N3, and delta-connection enters weak magnetic area, and APF values are declined, but total From the point of view of delta-connected APF values still be higher than wye connection.According to the above analysis, when the rotating speed of compressor reaches N1, inspection The operating parameter of the compressor measured is the opportunity of machine winding switching connection.
When being switched by compressor operating current control machine winding connection, when the rotating speed of compressor reaches N1, inspection The operating current for measuring compressor is In.When machine winding is run using wye connection, because of the operating load and pressure of air-conditioning The operating current of contracting machine has positive linear relationship, so operation of air conditioner load increases, illustrates that the operating current of compressor is also increasing Add, as the operating current I ＞ I for detecting compressornWhen, it is disconnected and is attracted by controller control relay, machine winding is made to cut Change to triangular form connection；When operation of air conditioner load reduces, the operating circuit of compressor is equally reducing, when detecting compressor Operating current I ＜ InWhen-△ I, is disconnected and be attracted by controller control relay, machine winding is made to be switched to wye connection.
It will be appreciated that different in the electric current when compressor rotary speed is N1 that different operating modes measure.In order to anti- Only the operating current I of compressor surrounds electric current InFluctuation up and down so that machine winding frequent switching causes parts damages, setting Current intervals value △ I.
When the pressure at expulsion by compressor controls the switching of machine winding connection, when the rotating speed of compressor reaches N1, Detect that the pressure at expulsion of compressor is Pn.Machine winding using wye connection run when because the operating load of air-conditioning with Compressor Discharge Pressure has positive linear relationship, so operation of air conditioner load increases, illustrates that the pressure at expulsion of compressor is also increasing Add, as the pressure at expulsion P ＞ P for detecting compressornWhen, it is disconnected and is attracted by controller control relay, machine winding is made to cut Change to triangular form connection；When operation of air conditioner load reduces, the pressure at expulsion of compressor is equally reducing, when detecting compressor Pressure at expulsion P ＜ PnWhen-△ P, is disconnected and be attracted by controller control relay, machine winding is made to be switched to wye connection.
It will be appreciated that different in the pressure at expulsion when compressor rotary speed is N1 that different operating modes measure.For Prevent the pressure at expulsion P of compressor from surrounding pressure PnFluctuation up and down so that machine winding frequent switching causes parts damages, Provided with pressure intervals value △ P.
When the back-emf voltage by any phase winding of motor controls the switching of machine winding connection, when turning for compressor When speed reaches N1, since operating load and the compressor rotary speed of air-conditioning have a positive linear relationship, and rotating speed and winding is anti-electronic The relationship of gesture is En=Φm×We×cos(We× t), wherein EnFor the back-emf voltage of any phase winding of motor, ΦmFor forever Magnet flow amount, WeFor angular speed, when obtaining the back-emf voltage of any phase winding of motor, sampling resistor to controller Voltage needs to exclude, when machine winding is run using wye connection, when operation of air conditioner load increase is to illustrate any phase of motor The back-emf voltage of winding is also increasing, as the back-emf voltage E ＞ E for detecting any phase winding of motornWhen, by controlling Device controls relay and disconnects and be attracted, and machine winding is made to be switched to triangular form connection；When operation of air conditioner load reduces, motor is appointed The back-emf voltage of one phase winding is equally reducing, as the back-emf voltage E ＜ E for detecting any phase winding of motorn-△ When E, is disconnected and be attracted by controller control relay, machine winding is made to be switched to wye connection.
It will be appreciated that the back-emf voltage E of any phase winding of motor surrounds voltage E in order to preventnFluctuation up and down, makes Machine winding frequent switching is obtained, parts damages are caused, is provided with voltage spaces value △ E.
Fig. 4 shows the schematic block diagram of the control device of the embodiment of the present invention.
As shown in figure 4, control device 150 according to the ... of the embodiment of the present invention, is used for frequency-variable air-conditioner, the control device 150 include processor 1502 and memory 1504, wherein the meter that can be run on processor 1502 is stored on memory 1504 It can be connected by bus between calculation machine program, wherein memory 1504 and processor 1502, the processor 1502 is for executing The step of control method described in embodiment as above is realized when the computer program stored in memory 1504.
Step in the method for the embodiment of the present invention can be sequentially adjusted, merged and deleted according to actual needs.
According to an embodiment of the invention, it is proposed that a kind of computer readable storage medium is stored thereon with computer program, The computer program realizes the step of control method described in embodiment as above when being executed by processor.
Further, it is to be understood that any process described otherwise above or method are retouched in flow chart or herein It states and is construed as, expression includes the steps that one or more executable fingers for realizing specific logical function or process Module, segment or the part of the code of order, and the range of the preferred embodiment of the present invention includes other realization, wherein can Not press sequence that is shown or discussing, include according to involved function by it is basic and meanwhile in the way of or in the opposite order, Function is executed, this should understand by the embodiment of the present invention person of ordinary skill in the field.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for Instruction execution system, device or equipment (system of such as computer based system including processor or other can be held from instruction The instruction fetch of row system, device or equipment and the system executed instruction) it uses, or combine these instruction execution systems, device or set It is standby and use.For the purpose of this specification, " computer-readable medium " can any can be included, store, communicating, propagating or passing Defeated program is for instruction execution system, device or equipment or the dress used in conjunction with these instruction execution systems, device or equipment It sets.The more specific example (non-exhaustive list) of computer-readable medium includes following：Electricity with one or more wiring Interconnecting piece (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory (ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable Medium, because can be for example by carrying out optical scanner to paper or other media, then into edlin, interpretation or when necessary with it His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of the present invention can be realized with hardware, software, firmware or combination thereof.Above-mentioned In embodiment, software that multiple steps or method can in memory and by suitable instruction execution system be executed with storage Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware Any one of row technology or their combination are realized：With the logic gates for realizing logic function to data-signal Discrete logic, with suitable combinational logic gate circuit application-specific integrated circuit, programmable gate array (PGA), scene Programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that realize all or part of step that above-described embodiment method carries Suddenly it is that relevant hardware can be instructed to complete by program, the program can be stored in a kind of computer-readable storage medium In matter, which includes the steps that one or a combination set of embodiment of the method when being executed.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, it can also That each unit physically exists alone, can also two or more units be integrated in a module.Above-mentioned integrated mould The form that hardware had both may be used in block is realized, can also be realized in the form of software function module.The integrated module is such as Fruit is realized in the form of software function module and when sold or used as an independent product, can also be stored in a computer In read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..
Technical scheme of the present invention is described in detail above in association with attached drawing, the technical solution, by controlling machine winding star Type connection makes to promote frequency-variable air-conditioner in the APF values of full frequency band to reduce user with delta-connected mutual conversion With the cost of air-conditioning equipment.
In the description of this specification, term " first ", " second ", " third ", " the 4th ", " the 5th " and " the 6th " is only used In the purpose of description, it is not understood to indicate or imply relative importance, it for the ordinary skill in the art, can To understand the concrete meaning of above-mentioned term in the embodiments of the present disclosure as the case may be.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc. Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the present invention It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with Suitable mode combines.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (12)

1. a kind of machine winding connection control circuit of compressor, which is characterized in that including：Controller, the first to the 6th relay Device and machine winding；
Wherein, described in the first end of first relay is connected to the U phases input terminal of the machine winding, second end is connected to The W phase output terminals of machine winding, third end are connected to the first control terminal and the 4th termination the first power supply electricity of the controller Pressure；
The first end of second relay is connected to the V phases input terminal of the machine winding, second end is connected to the motor The U phase output terminals of winding, third end are connected to the second control terminal and the 4th termination the first power supply electricity of the controller Pressure；
The first end of the third relay is connected to the W phases input terminal of the machine winding, second end is connected to the motor The V phase output terminals of winding, third end are connected to the third control terminal and the 4th termination the first power supply electricity of the controller Pressure；
Described in the first end of 4th relay is connected to the U phase output terminals of the machine winding, second end is respectively connected to The second end of 5th relay and the second end of the 6th relay, third end are connected to the 4th control terminal of the controller And the 4th termination the second supply voltage；
The first end of 5th relay is connected to the V phase output terminals of the machine winding, second end is respectively connected to the described 4th The second end of relay and the second end of the 6th relay, third end be connected to the controller the 5th control terminal and 4th termination second supply voltage；
The first end of 6th relay is connected to the W phase output terminals of the machine winding, second end is respectively connected to the described 4th The second end of relay and the second end of the 5th relay, third end be connected to the controller the 6th control terminal and 4th termination second supply voltage.
2. the machine winding connection control circuit of compressor according to claim 1, which is characterized in that further include：Power Factor correcting module, storage capacitor, the first sampling resistor, the second sampling resistor and three-phase inverting circuit；
Wherein, the output end of power factor correction module is parallel with the storage capacitor and first sampling resistor, and
First sampling resistor, second sampling resistor and the three-phase inverting circuit are sequentially connected in series, and described three Phase inverter circuit is connected to the machine winding.
3. the machine winding connection control circuit of compressor according to claim 2, which is characterized in that the three-phase inversion Circuit includes：Bridge arm IGBT pipes, U phase lower bridge arms IGBT are managed in U phases, bridge arm IGBT is managed in V phases, V phase lower bridge arms IGBT is managed, W phases Upper bridge arm IGBT pipes and W phase lower bridge arms IGBT pipes；
Wherein, bridge in the first end, the W phases of bridge arm IGBT pipes in the first end, the V phases of bridge arm IGBT pipes in the U phases The first end of arm IGBT pipes is respectively connected to first sampling resistor；
The second end of bridge arm IGBT pipes is connected to the first end of the U phases lower bridge arm IGBT pipes in the U phases, bridge in the V phases The second end of arm IGBT pipes is connected to the first end of the V phases lower bridge arm IGBT pipes, the second end of bridge arm IGBT pipes in the W phases It is connected to the first end of the W phases lower bridge arm IGBT pipes；
The second end of the U phases lower bridge arm IGBT pipes, the second end of the V phases lower bridge arm IGBT pipes, the W phases lower bridge arm IGBT The second end of pipe is respectively connected to second sampling resistor；
The U phase input terminals of the machine winding are respectively connected in the U phases bridge under the second end of bridge arm IGBT pipes and the U phases The first end of arm IGBT pipes, the V phase input terminals of the machine winding are respectively connected to the second end of bridge arm IGBT pipes in the V phases It is respectively connected to bridge arm in the W phases with the W phase input terminals of the first end of the V phases lower bridge arm IGBT pipes, the machine winding The first end of the second end of IGBT pipes and the W phases lower bridge arm IGBT pipes.
4. the machine winding connection control circuit of compressor according to claim 3, which is characterized in that further include：
Rotating speed sampling module is connected to the controller, the rotating speed for acquiring the compressor；
Current sampling circuit is connected to the controller, and the electric current of second sampling resistor is flowed through using as institute for acquiring State the operating current of compressor；
Voltage sampling circuit is connected to controller, for acquiring the voltage at first sampling resistor both ends using as the electricity Any phase back-emf voltage of machine winding；
Pressure at expulsion detection module is connected to the controller, the pressure at expulsion for detecting the compressor.
5. the machine winding connection control circuit of compressor according to claim 4, which is characterized in that the controller quilt It is configured to：
The motor unit is controlled according to the operating current or the pressure at expulsion or any phase back-emf voltage to exist Switch between wye connection and triangular form connection.
6. the machine winding connection control circuit of compressor according to any one of claim 1 to 5, which is characterized in that
When first relay, second relay and the third relay be off and the described 4th after When electric appliance, the 5th relay and the 6th relay are in attracting state, the machine winding is wye connection；
When first relay, second relay and the third relay be in attracting state and the described 4th after When electric appliance, the 5th relay and the 6th relay are off, the machine winding is triangular form connection.
7. the machine winding connection control circuit of compressor according to any one of claim 1 to 5, which is characterized in that The material of the forceful electric power contact of described first to the 6th relay is tungsten-copper alloy or silver tungsten.
8. a kind of frequency-variable air-conditioner, which is characterized in that include the electricity of the compressor as described in any one of claim 1 to 7 Machine winding connection method control circuit.
9. a kind of control method, which is characterized in that for compressor as described in any one of claim 1 to 7 motor around Group connection control circuit, the control method include：
Obtain default operational factor of the compressor under current working；
Controlling first to the 6th respective folding condition of relay according to the value range of the default operational factor makes institute It states machine winding and switches between wye connection and triangular form connection.
10. control method according to claim 9, which is characterized in that when the default operational factor is compressor operating It is described that the respective folding shape of first to the 6th relay is controlled according to the value range of the default operational factor when electric current It the step of state makes the machine winding switch between wye connection and triangular form connection, specifically includes：
When the machine winding is operated in triangular form connection and detects that the compressor operating electric current is less than the first predetermined current When, it controls first relay, second relay and third relay and enters off-state and the 4th relay Device, the 5th relay and the 6th relay enter attracting state, so that the machine winding is cut by triangular form connection Swap-in enters wye connection；
When the machine winding is operated in wye connection and detects that the compressor operating electric current is more than the second predetermined current, It controls first relay, second relay and the third relay and enters attracting state and the 4th relay Device, the 5th relay and the 6th relay enter off-state, so that the machine winding is switched by wye connection Into triangular form connection；
Wherein, second predetermined current is more than first predetermined current, and first predetermined current is the compressor Rotating speed reach corresponding compressor operating electric current when preset rotation speed.
11. control method according to claim 9, which is characterized in that when the default operational factor is compressor air-discharging It is described that the respective folding shape of first to the 6th relay is controlled according to the value range of the default operational factor when pressure It the step of state makes the machine winding switch between wye connection and triangular form connection, specifically includes：
When the machine winding is operated in triangular form connection and detects that the Compressor Discharge Pressure is less than the first preset pressure When, it controls first relay, second relay and third relay and enters off-state and the 4th relay Device, the 5th relay and the 6th relay enter attracting state, so that the machine winding is cut by triangular form connection Swap-in enters wye connection；
When the machine winding is operated in wye connection and detects that the Compressor Discharge Pressure is more than the second preset pressure, It controls first relay, second relay and the third relay and enters attracting state and the 4th relay Device, the 5th relay and the 6th relay enter off-state, so that the machine winding is switched by wye connection Into triangular form connection；
Wherein, second preset pressure is more than first preset pressure, and first preset pressure is the compressor Rotating speed reach corresponding Compressor Discharge Pressure when preset rotation speed.
12. control method according to claim 9, which is characterized in that when the default operational factor be the motor around It is described to control described first to the 6th according to the value range of the default operational factor when any phase back-emf voltage of group It is the step of respective folding condition of relay makes the machine winding switch between wye connection and triangular form connection, specific to wrap It includes：
When the machine winding is operated in triangular form connection and detects that any phase back-emf voltage is less than first and presets When voltage, controls first relay, second relay and third relay and enter off-state and the described 4th Relay, the 5th relay and the 6th relay enter attracting state, so that the machine winding is connect by triangular form Method switches into wye connection；
When the machine winding is operated in wye connection and detects that any phase back-emf voltage is more than the second default electricity When pressure, controls first relay, second relay and the third relay and enter attracting state and described the Four relays, the 5th relay and the 6th relay enter off-state, so that the machine winding is connect by star-like Method switches into triangular form connection；
Wherein, second predeterminated voltage is more than first predeterminated voltage, and first predeterminated voltage is the compressor Rotating speed reach the corresponding any phase back-emf voltage of machine winding when preset rotation speed.
CN201810004794.7A 2018-01-03 2018-01-03 Machine winding connection control circuit, frequency-variable air-conditioner and control method Pending CN108462424A (en)

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CN109975647A (en) * 2019-04-24 2019-07-05 重庆理工大学 A kind of motor winding open circuit On-line self-diagnosis method of triangular form connection
CN111478642A (en) * 2020-04-16 2020-07-31 广州华凌制冷设备有限公司 Drive control circuit, drive control method, circuit board and air conditioner
CN112311295A (en) * 2020-02-21 2021-02-02 北京六十六号互动科技有限公司 Method and device for switching winding wiring state of motor and motor control system
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CN1565075A (en) * 2001-10-03 2005-01-12 株式会社安川电机 Apparatus for switching windings of AC three-phase motor
CN2710249Y (en) * 2004-05-07 2005-07-13 张书峰 Star-delta automatic commutator for light-heavy load of electric motor of injection machine
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Publication number Priority date Publication date Assignee Title
CN109975647A (en) * 2019-04-24 2019-07-05 重庆理工大学 A kind of motor winding open circuit On-line self-diagnosis method of triangular form connection
CN112311295A (en) * 2020-02-21 2021-02-02 北京六十六号互动科技有限公司 Method and device for switching winding wiring state of motor and motor control system
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CN111478642A (en) * 2020-04-16 2020-07-31 广州华凌制冷设备有限公司 Drive control circuit, drive control method, circuit board and air conditioner
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CN113765467A (en) * 2021-09-18 2021-12-07 广州小鹏汽车科技有限公司 Motor control method, device and storage medium
CN113765467B (en) * 2021-09-18 2024-05-28 广州小鹏汽车科技有限公司 Motor control method, motor control device and storage medium

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Application publication date: 20180828