CN110224661A - Motor driven systems, motor, household electrical appliance - Google Patents
Motor driven systems, motor, household electrical appliance Download PDFInfo
- Publication number
- CN110224661A CN110224661A CN201910479709.7A CN201910479709A CN110224661A CN 110224661 A CN110224661 A CN 110224661A CN 201910479709 A CN201910479709 A CN 201910479709A CN 110224661 A CN110224661 A CN 110224661A
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- CN
- China
- Prior art keywords
- motor
- capacitor
- driven systems
- motor driven
- voltage
- 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
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
-
- 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
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- H02P29/0241—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an overvoltage
-
- 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
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/032—Preventing damage to the motor, e.g. setting individual current limits for different drive conditions
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0038—Circuits or arrangements for suppressing, e.g. by masking incorrect turn-on or turn-off signals, e.g. due to current spikes in current mode control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/322—Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The present invention provides a kind of motor driven systems, motor, household electrical appliance.The motor driven systems, comprising: rectification circuit, for AC power source to be rectified；Inverter circuit is operated by the output driving of the rectification circuit, and for driving motor；Capacitor C1 is connect with the output-parallel of the rectification circuit；Further include: dissipative load R3, it is in parallel with the capacitor C；Control module, whether the voltage for detecting the both ends the capacitor C1 is higher than preset value, when being higher than preset value, consumes the electricity of the capacitor C1 by the dissipative load R3, when it is described be lower than preset value when, disconnect the dissipative load R3 and the capacitor C1.A kind of motor driven systems according to the present invention, motor, household electrical appliance, circuit design is simple, easy to implement, can effectively ensure that the voltage of DC bus is within the scope of safe voltage, protects electronic component and motor in drive system.
Description
Technical field
The invention belongs to electrical equipment control design fields, and in particular to a kind of motor driven systems, motor, household electric
Device.
Background technique
The household appliance technical fields such as refrigerator, air-conditioning, fan improve system reliability, increase power factor, reduce cost
It is the trend gradually developed.Bus no electrolytic capacitor permanent magnet synchronous motor (PMSM) drive system have service life it is strong,
The features such as power factor is high, at low cost, highly reliable.As shown in Figure 1, no electrolytic capacitor PMSM Drive System is opened up
Flutter that structure is simple, by power grid (AC power source), uncontrollable rectifier bridge (rectification circuit), the thin-film capacitor of low capacity, three-phase voltage
Type inverter (inverter circuit) and permanent magnet synchronous motor composition.In bus no electrolytic capacitor PMSM Drive System
The phenomenon that being easy to appear over-voltage.
The over-voltage producing cause of busbar voltage:
1, when overcurrent phenomenon occurs in bus no electrolytic capacitor PMSM Drive System, general protection circuit
It is direct closing inverter, the electric current of permanent magnet synchronous motor winding will not suddenly disappear, and will necessarily pass through three-phase voltage type inversion
The protection diode of device feeds back to bus thin-film capacitor, but the memory capacity of bus amount thin-film capacitor is small, will cause bus mistake
Voltage phenomenon, as shown in Figure 2；
2, when bus no electrolytic capacitor PMSM Drive System is run, thin-film capacitor C1 and grid side inductance L
It is also easy to produce resonance phenomena, busbar voltage is caused to have excessively high peak voltage, it can be to uncontrollable rectifier bridge, thin-film capacitor, inverter
Etc. electronic component around the busbar voltages risk that causes moment over-voltage to burn；
3, when net side power supply is unstable, the voltage on peak will cause busbar voltage raising, cause permanent magnet synchronous motor around
The hidden danger that group is burnt.
The guard methods such as current overcurrent-overvoltage are all direct closing inverters, but same in bus no electrolytic capacitor permanent magnetism
It walks in motor driven systems and closes after inverter, the electric current of machine winding can feed back to mother by the protection diode of inverter
The capacitance of line thin-film capacitor, thin-film capacitor is small, cause busbar voltage pump rise, therefore be also required to it is a kind of inhibition busbar voltage pump rise
Protect circuit；In addition contain a large amount of peak voltage in bus no electrolytic capacitor PMSM Drive System median generatrix, it is right
Surrounding hardware voltage has damage behavior, it is therefore desirable to which a kind of protection circuit for inhibiting bus overvoltage is based on such reason, proposes this
Invention.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that providing a kind of motor driven systems, motor, household electrical appliance, electricity
Road design is simple, easy to implement, can effectively ensure that the voltage of DC bus is within the scope of safe voltage, protects drive system
In electronic component and motor.
To solve the above-mentioned problems, the present invention provides a kind of motor driven systems, comprising:
Rectification circuit, for rectifying AC power source；
Inverter circuit is operated by the output driving of the rectification circuit, and for driving motor；
Capacitor C1 is connect with the output-parallel of the rectification circuit；
Further include:
Dissipative load R3, it is in parallel with the capacitor C；
Whether control module, the voltage for detecting the both ends the capacitor C1 are higher than preset value, when being higher than preset value,
Consume the electricity of the capacitor C1 by the dissipative load R3, when it is described be lower than preset value when, make the energy consumption
The R3 and capacitor C1 is loaded to disconnect.
Preferably,
The control module includes bleeder circuit, and the bleeder circuit includes concatenated first voltage grading resistor R1, second
Voltage grading resistor R2, the bleeder circuit are connect with the output-parallel of the rectification circuit；
It further include control switch, the control switch includes control terminal, first end, second end, and the control terminal is controlled by
The real-time voltage value Uref at the both ends the second voltage grading resistor R2, when Uref be higher than preset value when, be connected the first end with
Second end when Uref is lower than preset value, is cut so that the electricity of the capacitor C1 is consumed by the dissipative load R3
The first end of breaking and second end are so that the dissipative load R3 and capacitor C1 is disconnected.
Preferably,
The control switch is one of triode, MOSFET, IGBT.
Preferably,
When the control switch is triode, the first end is the collector of triode, and the second end is three poles
The emitter of pipe, the control terminal are the base stage of triode.
Preferably,
The resistance value of the first resistor device R1 is at least five times of the resistance value of the dissipative load R3, second electricity
The resistance value of resistance device R2 is at least five times of the resistance value of the dissipative load R3.
Preferably,
The capacitor C1 is 20 μ F thin-film capacitors.
The present invention also provides a kind of motors, including above-mentioned motor driven systems.
Preferably,
The motor is permanent magnet synchronous motor.
The present invention also provides a kind of household electrical appliance, including above-mentioned motor.
Preferably,
The household electrical appliance include one of refrigerator, air conditioner, fan.
A kind of motor driven systems provided by the invention, motor, household electrical appliance, the voltage difference between the DC bus
When excessively high, the control module will make the dissipative load R3 and capacitor C1 form circuit closed loop in time, to disappear
The electricity that the capacitor C1 is stored is consumed, busbar voltage is effectively ensured and is limited within the scope of preset safe voltage, is prevented
The only damage that the excessively high electronic component in system of busbar voltage may cause.
Detailed description of the invention
Fig. 1 is the electrical block diagram of motor driven systems in the prior art；
Fig. 2 for the motor driven systems in Fig. 1, when inverter circuit is closed, show in motor by the flowing of three-phase coil electric current
It is intended to；
Fig. 3 is the electrical block diagram of motor driven systems of the invention.
Appended drawing reference indicates are as follows:
1, rectification circuit；2, inverter circuit；3, control module；10, AC power source；20, motor.
Specific embodiment
It is shown in Figure 3, according to an embodiment of the invention, providing a kind of motor driven systems, comprising: rectification circuit 1 is used
It is rectified in by AC power source 10, specifically, the rectification circuit 1 is made of diode D1, D2, D3, D4；Inverter circuit 2, by
The output driving of the rectification circuit 1, and for driving motor 20 operate, the inverter circuit 2 by six groups of IGBT switch J1,
J2, J3, J4, J5, J6 constitute, while J1, J2, J3, J4, J5, J6 be each configured with protection diode VD1, VD2, VD3, VD4,
VD5,VD6；Capacitor C1 is connect with the output-parallel of the rectification circuit 1；Further include: dissipative load R3, with the capacitor
C1 is in parallel；Whether control module 3, the voltage for detecting the both ends the capacitor C1 are higher than preset value, when being higher than preset value,
Consume the electricity of the capacitor C1 by the dissipative load R3, when it is described be lower than preset value when, make the energy consumption
It loads the R3 and capacitor C1 to disconnect, the voltage namely the rectification circuit 1 at the both ends capacitor C1 above-mentioned and the inversion
DC bus-bar voltage between device circuit 2 is poor.In the technical solution, when the voltage difference between the DC bus is excessively high, institute
Stating control module 3 will make the dissipative load R3 and capacitor C1 form circuit closed loop in time, to consume the electricity
The electricity that container C1 is stored is effectively ensured busbar voltage and is limited within the scope of preset safe voltage, prevents bus electric
Press through the high damage that may cause to the electronic component in system.AC power source 10 above-mentioned is used as power input, can also be with
It is power grid.And for the dissipative load R3, it is substantially an electrical appliance, when it forms closed loop with the capacitor C1
When, the discharge current of capacitor C1 flows through the dissipative load R3 and consumes energy, such as the electric energy for flowing through it is converted to other
The ability of form, such as the rotation of thermal energy, mechanical energy fan blade.
As a kind of specific embodiment of the control module 3, the control module 3 include bleeder circuit, described point
Volt circuit includes concatenated first voltage grading resistor R1, the second voltage grading resistor R2, the bleeder circuit and the rectification circuit 1
Output-parallel connection；It further include control switch, the control switch includes control terminal, first end, second end, the control terminal
It is controlled by the real-time voltage value Uref at the both ends the second voltage grading resistor R2, when Uref is higher than preset value, is connected described the
One end is with second end so that the electricity of the capacitor C1 is consumed by the dissipative load R3, when Uref is lower than preset value
When, the first end and second end is truncated so that the dissipative load R3 and capacitor C1 is disconnected.Specifically, the control
Switch can be one of triode, MOSFET, IGBT.Uref above-mentioned uses formula:
It is calculated,
Wherein VDC is the voltage at the both ends the capacitor C1.
When the control switch is triode, the first end is the collector of triode, and the second end is three poles
The emitter of pipe, the control terminal are the base stage of triode.When the control switch is MOSFET or IGBT, the first end
Its source electrode is then corresponded to, the second end corresponds to its drain electrode, and the control terminal then corresponds to its grid.
Preferably, the resistance value of the first resistor device R1 is at least five times of the resistance value of the dissipative load R3, institute
The resistance value for stating second resistor R2 is at least five times of resistance value of the dissipative load R3, can so take into account partial pressure electricity
Road plays the energy consumption effect that dissipative load is better achieved while voltage sample effect.
The capacitor C1 is 20 μ F thin-film capacitors, so that the drive system is become the drive system of no electrolytic capacitor, mentions
The service life of driving circuit is risen.
The present invention also provides a kind of motors, and including above-mentioned motor driven systems, further, the motor is that permanent magnetism is same
Walk motor.
The present invention also provides a kind of household electrical appliance, including above-mentioned motor.The household electrical appliance include refrigerator, air conditioner,
One of fan.
Those skilled in the art will readily recognize that above-mentioned each advantageous manner can be free under the premise of not conflicting
Ground combination, superposition.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.Above only
It is the preferred embodiment of the present invention, it is noted that for those skilled in the art, do not departing from this hair
Under the premise of bright technical principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as guarantor of the invention
Protect range.
Claims (10)
1. a kind of motor driven systems, comprising:
Rectification circuit (1), for rectifying AC power source (10)；
Inverter circuit (2) is operated by the output driving of the rectification circuit (1), and for driving motor (20)；
Capacitor C1 is connect with the output-parallel of the rectification circuit (1)；
It is characterized by further comprising:
Dissipative load R3, it is in parallel with the capacitor C1；
Whether control module (3), the voltage for detecting the both ends the capacitor C1 are higher than preset value, when being higher than preset value,
Consume the electricity of the capacitor C1 by the dissipative load R3, when it is described be lower than preset value when, make the energy consumption
The R3 and capacitor C1 is loaded to disconnect.
2. motor driven systems according to claim 1, which is characterized in that
The control module (3) includes bleeder circuit, and the bleeder circuit includes concatenated first voltage grading resistor R1, second point
Piezoresistance device R2, the bleeder circuit are connect with the output-parallel of the rectification circuit (1)；
It further include control switch, the control switch includes control terminal, first end, second end, and the control terminal is controlled by described
The first end and second is connected when Uref is higher than preset value in the real-time voltage value Uref at the second both ends voltage grading resistor R2
It holds so that the electricity of the capacitor C1 is consumed by the dissipative load R3, when Uref is lower than preset value, truncation institute
First end and second end are stated so that the dissipative load R3 and capacitor C1 is disconnected.
3. motor driven systems according to claim 2, which is characterized in that
The control switch is one of triode, MOSFET, IGBT.
4. motor driven systems according to claim 3, which is characterized in that
When the control switch is triode, the first end is the collector of triode, and the second end is triode
Emitter, the control terminal are the base stage of triode.
5. motor driven systems according to claim 2, which is characterized in that
The resistance value of the first resistor device R1 is at least five times of the resistance value of the dissipative load R3, the second resistor
The resistance value of R2 is at least five times of the resistance value of the dissipative load R3.
6. motor driven systems according to claim 1, which is characterized in that
The capacitor C1 is 20 μ F thin-film capacitors.
7. a kind of motor, including motor driven systems, which is characterized in that the motor driven systems are to appoint in claim 1 to 7
Motor driven systems described in one.
8. motor according to claim 7, which is characterized in that the motor is permanent magnet synchronous motor.
9. a kind of household electrical appliance, including motor, which is characterized in that the motor is motor described in claim 7 or 8.
10. household electrical appliance according to claim 9, which is characterized in that including one of refrigerator, air conditioner, fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910479709.7A CN110224661A (en) | 2019-06-04 | 2019-06-04 | Motor driven systems, motor, household electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910479709.7A CN110224661A (en) | 2019-06-04 | 2019-06-04 | Motor driven systems, motor, household electrical appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110224661A true CN110224661A (en) | 2019-09-10 |
Family
ID=67819548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910479709.7A Pending CN110224661A (en) | 2019-06-04 | 2019-06-04 | Motor driven systems, motor, household electrical appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110224661A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111049366A (en) * | 2019-12-05 | 2020-04-21 | 珠海格力电器股份有限公司 | Bus capacitor discharge circuit after power failure of servo driver, control method and servo driver |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009278857A (en) * | 2008-04-17 | 2009-11-26 | Toshiba Corp | Inverter apparatus, motor driving system, washer, and air conditioner |
| CN202746094U (en) * | 2012-08-02 | 2013-02-20 | 中船重工（武汉）凌久电气有限公司 | Wind power generation direct-current variable pitch driven braking circuit |
| CN107888062A (en) * | 2017-11-02 | 2018-04-06 | 湖北三江航天万峰科技发展有限公司 | A kind of high-power corona discharge devices |
| CN109417355A (en) * | 2016-06-15 | 2019-03-01 | 三菱电机株式会社 | Motor drive |
-
2019
- 2019-06-04 CN CN201910479709.7A patent/CN110224661A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009278857A (en) * | 2008-04-17 | 2009-11-26 | Toshiba Corp | Inverter apparatus, motor driving system, washer, and air conditioner |
| CN202746094U (en) * | 2012-08-02 | 2013-02-20 | 中船重工（武汉）凌久电气有限公司 | Wind power generation direct-current variable pitch driven braking circuit |
| CN109417355A (en) * | 2016-06-15 | 2019-03-01 | 三菱电机株式会社 | Motor drive |
| CN107888062A (en) * | 2017-11-02 | 2018-04-06 | 湖北三江航天万峰科技发展有限公司 | A kind of high-power corona discharge devices |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111049366A (en) * | 2019-12-05 | 2020-04-21 | 珠海格力电器股份有限公司 | Bus capacitor discharge circuit after power failure of servo driver, control method and servo driver |
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Application publication date: 20190910 |