CN1886886A - An induction motor control system - Google Patents
An induction motor control system Download PDFInfo
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- CN1886886A CN1886886A CNA2004800353578A CN200480035357A CN1886886A CN 1886886 A CN1886886 A CN 1886886A CN A2004800353578 A CNA2004800353578 A CN A2004800353578A CN 200480035357 A CN200480035357 A CN 200480035357A CN 1886886 A CN1886886 A CN 1886886A
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- voltage
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- induction motor
- value
- motor
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- 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
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/42—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual single-phase induction motor
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- 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
-
- 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
- H02P27/02—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using supply voltage with constant frequency and variable amplitude
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
- Motor And Converter Starters (AREA)
Abstract
An induction motor (10) control-system (1) / induction motor (10) assembly, an induction motor control system (1), a method of controlling an induction motor (10), and a compressor controlled with an induction motor according to the teachings of the present invention are described. The objective is to provide an assembly, a system and a method with which it will be possible to operate a motor (10) in a broad range of values of the network feed voltage (VAC), as well as a form of adjusting the controlled voltage (VC) that enables the correction of the voltage applied as a function of the network frequency (fAc).
Description
The application requires the priority of the Brazilian patent case No.PI0305338-5 of submission on November 28th, 2003, and it is incorporated herein by reference.
Invention field
The present invention relates to the system of a kind of induction motor control system/induction electric thermomechanical components, a kind of control of induction, a kind of method of control of induction, also relate to the compressor that instruction according to the present invention utilizes induction motor control in addition.
The description of prior art
Because simplicity, robustness and the high-performance of monocyclic-start induction motor, monocyclic-start induction motor is widely used.They are used in household electrical appliance, for example refrigerator, cooler, air-conditioning, hermetic compressor, washing machine, electrodynamic pump, fan and some commercial Application usually.
Known induction motor is equipped with usually by the cage-type rotor of two windings structures and the stator of coiling, and one of them winding is the operation winding, and another winding is to start winding.During the normal running of compressor, to operation winding feed, temporary transient giving starts the winding feed when start-up operation begins, thereby produces rotating magnetic field in stator gap by alternating voltage, and condition is must make the rotor acceleration and start it.
By to the actuating coil feed with respect to the electric current that in main winding, circulates, preferably to approach the electric current of angle time lags of 90 degree, can realize described rotating magnetic field.This time lag between the electric current that circulates in winding is connected with one of winding, is still realized with the external impedance that starts windings in series usually by the architectural characteristic of winding or by installing.Normally high during the process of this value at ato unit of the electric current that in starting winding, circulates, need to use certain switch so that quickening to interrupt this electric current after the time necessary through the promotion motor.In case motor is started working, then move necessary rotating field by the operation magnetic field that winding produced and magnetic field interaction of in rotor, being responded to and maintenance motor.
In addition, about the startup of such motor, owing to do not rotate at the situation lower rotor part that voltage only is applied on the stator, so should be provided for causing the device of motor rotation, so that machine can be worked.
At FITZGERALD, A.E., KINGSLEY, C.﹠amp; KUSKO has described the example that starts the usual method of induction motor in the book of the book of A. (ElectricMachines, Ed.McGraw-Hill do Brasil, 1975).
Because knot is made characteristic, induction motor should be worked in limited voltage and frequency range.The feed voltage more much higher than the voltage of project increases field winding too many, therefore increases the magnetic field in the gap, and therefore makes the ferromagnetic material of stator and rotor saturated.If voltage is lifted to be higher than this point, then owing to the low magnetic resistance in magnetic field, electric current raises very apace.On the other hand, the feed voltage more much lower than the voltage of this project reduces the exciting curent of motor significantly, therefore reduce axle and go up an available torque, so motor can not support to be applied to normal load on it in this case, this axle enters blocking.The variation of frequency causes similar situation.
The shortcoming of prior art
With regard to the startup form of monocyclic-start induction motor, although modern technologies make that the startup of motor is practical, but such solution is produced by complicated more structure, because in situation about using with the capacitor that starts windings in series, have good result aspect the startup of motor, but the cost of the final solution of this raising equipment.
With regard to regard to the variable problem of voltage level in the network of determining the zone, one of mode that is used to address this problem is to adopt the motor of the oversize of working in wide-voltage range.These motor are worked under their maximum load, so even exist feed to reduce, motor still has tractive effort and bears load.Equally, because the robustness of motor is compared with less motor, the motor of oversize can bear bigger overvoltage, and does not have the problem of overcurrent and heating.This has solved the problem that feed voltage changes, but causes the demand to structure large scale heavy-duty motor inevitably, and therefore has expensive.
About the variable problem of different application zone medium frequency at motor, solution is to adopt different motor at the different frequency of feed voltage, thus produce and stock's management aspect produce bigger complexity and make be difficult to or even prevention product is used to have in the zone of different main frequencies.
Currently used another solution is to use the motor of " tap " with the various magnitudes of voltage that are used to select feeding network.This solution has solved the problem of change in voltage, but needs to adopt the tap of various mains switches with conversion multivoltage motor.
Another selection that is used to address this problem is to adopt the pressurizer that is associated with motor.This solution also proves little practicality and has expensive in addition.
Purpose of the present invention
The method that the objective of the invention is a kind of induction motor control/induction electric thermomechanical components, a kind of induction control system, a kind of control of induction, be the compressor that instruction according to the present invention utilizes induction motor control in addition, wherein can be in the wide range of voltage values of feeding network operating motor.
And the purpose of this invention is to provide a kind of like this assembly, system, method and compressor with correction as the possibility of the voltage that function applied of the frequency of feeding network.
In addition,, predict a kind of possibility that starts the motor that is assembled in the mode of isolating with compressor or combine according to instruction of the present invention, and the use that economizes the deactivation capacitor.
In addition, according to instruction of the present invention, another purpose is avoid motor oversize, and therefore avoids the size of material cost, equipment and weight to increase.
Another object of the present invention is to prevent that motor is overheated when network voltage is high, thereby improves its performance and life expectancy.
The invention summary
In order to solve problems of the prior art and in order to realize purpose of the present invention, assembly of the present invention, system, method and compressor are used to monocyclic-start induction motor, this monocyclic-start induction motor is designed to work under the routine value of network, so network will always can be given the motor feed, and for this reason,, then be enough if the value of controlled voltage is lower than the minimal network value, that is to say that the value of network voltage should be a value that reduces.
The size that realizes motor in such a way is definite, makes the needed pull up torque utilization of starting load realize than the voltage that desired minimum voltage is lower in the feeding network.Therefore, the torque of being supplied with by motor will be always greater than needed minimum value under any voltage conditions of supplying with at network.
In order to observe the operation of network medium frequency fluctuation, perhaps even in order to be installed in when being different from the zone of rated frequency of motor, network adjusts motor at motor, stipulated the determining of rated voltage after the change of motor, so that motor is used with the adjustment of the needed voltage level of rated current work, therefore prevent low torque or heating and the problem of burning motor.
Purpose of the present invention realizes by induction motor control system/induction electric thermomechanical components, this motor and induction have rated operational voltage, this control system comprises CPU, described CPU is modulated the level of controlled network voltage, controlled voltage is applied on the induction motor, described network voltage begins fluctuation from minimal network voltage, described network voltage has network, and induction motor has rated operational voltage and nominal operation frequency, induction motor has the rated operational voltage of the value that is lower than minimal network voltage, described processing unit Measurement Network frequency, and when there are differences between network and the nominal operation frequency, described processing unit is determined the value of the rated voltage after the change, rated voltage after this change is applied on the induction motor, and when network equaled network, described processing unit changed to the value of controlled voltage the level of rated voltage.
Purpose of the present invention also realizes by the induction motor control system that comprises the CPU that is associated with network voltage, described processing unit can be associated with described induction motor, induction motor has rated operational voltage, network voltage begins fluctuation from minimal network voltage, give the induction motor feed by the controlled voltage that obtains from network voltage, adjust controlled voltage by CPU, induction motor has rated operational voltage, the value of minimal network voltage is the value that is higher than the rated operational voltage value of induction motor, described CPU is adjusted into the function of the variation of network voltage with controlled voltage, and when starting network voltage is imposed on induction motor.
Purpose of the present invention realizes by the method for control of induction in addition, this induction motor has rated operational voltage and nominal operation frequency, come to this induction motor feed by the controlled voltage that the modulation from network voltage obtains, network voltage has network, said method comprising the steps of: (a) Measurement Network voltage, measurement controlled voltage and Measurement Network frequency; B) value of measured network is compared with the nominal operation frequency, and when there are differences between network and the nominal operation frequency, the value of the rated voltage after determining to change, and the controlled voltage that will be in the value of the rated voltage after the change is applied on the induction motor, and when network equals the nominal operation frequency, the value of controlled voltage is adjusted into the level of rated voltage.
The accompanying drawing summary
Referring now to embodiment represented in the accompanying drawing the present invention is described in further detail.
-Fig. 1 represents the block diagram of system of the present invention; And
-Fig. 2 represents the time diagram of the fluctuation of network voltage.
Accompanying drawing describes in detail
As can seeing at Fig. 1, give electrical induction motors 10 feeds by controlled voltage Vc, this controlled voltage Vc is by to network voltage V
AcModulate and obtain.
In order to carry out this modulation, CPU one group of switch 6 of 8 controls and 7 (they are optionally started), thereby the level of control controlled voltage Vc.
This group switch 6,7 consists essentially of run switch 6, and it interconnects with the operation winding electric of induction motor 10; And starting switch 7, the startup winding electric interconnection of itself and motor 10, motor 10 allows to select these windings by processing center 8.
For monitor network voltage V
ACLevel and the level of controlled voltage Vc, correspondingly be provided with first and second voltage measuring apparatus 4,11, the both is associated with CPU 8.For example, this voltage sensor can be the resitstance voltage divider that is applied to the analog input end of CPU 8.
In addition, be provided with and CPU 8 and network voltage V
ACAssociated frequency transducer 5.This frequency sensor 9 can be the digit counter that per second is subjected to the cycle that network voltage influences, and can be to be used for the analog-to-frequency converter of voltage or to determine arbitrary circuit in the cycle that influenced by network voltage.
According to instruction of the present invention, system 1 is except the Measurement Network frequency f
ACOutside measurement is applied to the voltage and current on the motor 10 and adjusts these tittles by CPU 8, and in fact measurement is applied to the level of the controlled voltage Vc on the motor 10, so except the form of instruction actuating motor 10 according to the present invention, as network f
ACThe nominal operation frequency f that is different from motor 10
NMThe time, the value of controlled voltage Vc may be suitable.
The control of the level of controlled voltage Vc
As can in Fig. 2, seeing network voltage V
ACWill be at maximum network voltage V
AC-MAXWith minimal network voltage V
AC-MINThe scope predicted in the fluctuation.
According to instruction of the present invention, should use rated operational voltage V
NMBe lower than minimal network voltage V
AC-MINMotor 10.
According to Fig. 2, motor 10 should be designed to rated operational voltage V
NMOr be lower than network feed voltage V
ACIn expection minimum value, that is to say and be lower than minimal network voltage V
AC-MINEffective voltage value work.
Utilize this embodiment, because rated operational voltage V
NMAlways keep below minimal network voltage V
AC-MINValue, so always can give motor 10 feeds, and for this purpose, make controlled voltage V
CValue be lower than minimal network voltage V
AC-MINValue just enough, that is to say, should reduce network voltage V by the modulation of run switch 6
ACValue.Utilize this control system 1, can be at wide network feed voltage V
ACOperating motor in the value scope.
Actuating motor 10
By in conjunction with control system of the present invention 1 work or even by operating voltage V
NMBe designed to be lower than minimal network voltage V
AC-MINThe advantage that this application form produced of the motor controlled of control system 1 be the following fact, promptly needn't use the startup capacitor that is used to increase detent torque, because this increase realizes by apply the voltage that is higher than rated voltage during start-up period.
The appearance of this advantage be because the moment of actuating motor 10 run switch 6 and starting switch 7 will for example be in and network voltage V by order
ACThe controlled voltage V of identical value
CImpose on motor 10.At network voltage V
ACValue be higher than rated operational voltage V
NMThe situation of value under, even do not use the startup capacitor, also guarantee the bigger current i of circulation in motor 10 make motor 10 rotors begin to rotate required torque so that provide.In addition, assembly of the present invention prevents the oversize of motor 10 in addition, thereby causes reducing material cost, size and the weight of these equipment.
Because network voltage V in determining state as mentioned above
ACCan have very high value applies and network voltage V continuing
ACThe identical controlled voltage V of value
CSo, have and necessary be, should be between the starting period only with the controlled voltage V that is applied on the motor 10
CBe adjusted into the rated operational voltage V that is higher than motor
NMValue.
In any case, should observe, should design rated operational voltage V
NMValue always can force the controlled voltage value V that is higher than the required value of the nominal torque that obtains motor 10 so that guarantee CPU 8
C
In operation, the startup of motor 10 is subjected to encourage simultaneously to start winding and move winding to be influenced, till motor rotor has reached specified rotation or has had the approaching basically rotation of specified rotation at least, even so that also can guarantee its normal function after disconnecting starting switch 7, it broke after the scheduled time that starting switch occurs in actuating motor.
With controlled voltage V
CBe adjusted into network f
ACFunction
In order to make motor 10 always be in optimum state, CPU 8 should be adjusted as network voltage V
ACThe controlled voltage V of function of variation
C, so that controlled voltage V
CValue keep constant.This is by the frequency f by frequency sensor 5 Measurement Network voltages
ACRealize that this frequency sensor 5 is adjusted controlled voltage V according to CPU 8
CTo make it to keep being suitable for the normal condition of motor 10.
Therefore, if network voltage V
ACFrequency exist to change, then should increase or reduce controlled voltage V
CTo prevent by because of network f
ACThe caused respective impedance of new value change and the reducing or increase of the current i of motor 10 stators that cause.The electric current that is caused by the load variations on the axle changes will not influence the output voltage values of being forced by controller, and this output voltage values will only be adjusted at frequency change.
In order to realize this point, motor control system 1/ motor 10 assemblies should be designed and control system 1 should be isolated, so that processing unit 8 can the Measurement Network frequency f
ACAnd relatively be somebody's turn to do value and the motor operating frequency f that measures
NMValue, motor operating frequency f wherein
NMBe confirmed as the function of the type of the motor 10 of planning to use in advance.When processing unit detects at network f
ACWith the nominal operation frequency f
NMBetween when there are differences, processing unit 8 should be determined rated voltage V
NMNew value, this rated voltage V
NMTo be the rated voltage V after the change
NM-ARated voltage V after this change
NM-AValue be corrected as the function of network and this correction will with network f
ACValue and the nominal operation frequency f of motor 10
NMDifference proportional, and be applied to controlled voltage V on the motor 10
cTo have the rated voltage V after the change
NM-A
Utilize the rated voltage V after changing
NM-AValue, at the new value that will be applied to the rated voltage on the motor 10, system can apply the controlled voltage Vc after the correction, motor 10 will utilize the rated voltage V with motor
NMThe level voltage differential level work of comparing, and in this way, it will prevent that the electric current I of motor 10 stators is as network voltage f
ACVariable function and be raised or reduce.
Except making motor 10 suitably is controlled at network f
ACBe not under the constant situation feasible outside, can also prevent at the definite network f that determines the zone
ACThe use problem of designed motor, this motor is used to have the heterogeneous networks frequency f
ACAnother zone in.
System of the present invention prevents to burn motor 10 or the problem of low torque on it.Can understand this fact based on following example: if with 60Hz, that is to say the network f that is higher than that network that design the time predicted
ACGive the network f that is designed to 50Hz
ACMotor 10 feeds of work, then motor inductance will increase and the current i of motor 10 will reduce, thereby cause the commentaries on classics distance of motor low.In opposite situation, if with the network of 50Hz for giving the network f that is designed to 60Hz
ACThe motor feed, then it will have overcurrent i, and this will cause excessive heat and even burn motor 10.
The method of control motor 10
In order to control motor control system 1 of the present invention, be provided with a kind of method, this method has initial Measurement Network voltage V
AC, controlled voltage Vc and network f
ACStep.
Network f
ACMeasured value should with the nominal operation frequency f
NMCompare, since the architectural characteristic of motor 10, described nominal operation frequency f
NMKnow in advance.If detect network f
ACMeasured value and nominal operation frequency f
NMBetween difference, can infer that then motor 10 just working outside perfect condition, and the controlled voltage Vc that therefore is applied on the motor 10 should be raised or reduce, as has been described.This rising of the level of controlled voltage Vc or reduction realize the rated voltage V after processing unit 8 is determined to be called change in this step by such step
NM-AThe new value of controlled voltage Vc, and from the moment, it can be at network f
ACThis new state under work, and motor 10 can not occur low change apart from or the problem of excessive heat.
When processing unit 8 is concluded at network f
ACValue and nominal operation frequency f
NMBetween when not there are differences, the value of controlled voltage Vc should be reduced to rated voltage V
NMLevel.
With regard to the step of the inventive method when the actuating motor 10, should the network voltage of equaling V will be had
ACThe controlled voltage Vc of value impose on the motor start-up winding and this voltage that applied should be held long enough so that motor approaches specified rotation and start-up time that can normal running basically.
As mentioned above, consider network voltage V in determining state
ACMay have and be used to continue to apply and network voltage V
ACThe too high value of the identical controlled voltage Vc of level, having necessary is should only be adjusted to the rated operational voltage V that is higher than motor at the controlled voltage Vc that is applied between the starting period on the motor 10
NMValue, be lower than network voltage V in this case
ACValue.
In addition, according to instruction of the present invention, should provide, predict, and this compressor can separate use with the compressor use or with compressor by motor 10 compressor driven that are equipped with aforesaid control system 1.
Described preferred embodiment, it should be understood that scope of the present invention only comprises that wherein claim comprises possible equivalents by other possible flexible programs that content limited of subsidiary claim.
Claims
(according to the modification of the 19th of treaty)
1. one kind has rated operational voltage (V
NM) induction motor (10) control system (1)/monocyclic-start induction motor (10) assembly,
Control system (1) comprises CPU (8), and described CPU (8) is with network voltage (V
AC) level modulation be controlled voltage (V
C) level, described controlled voltage (V
C) be applied on the induction motor (10),
Network voltage (V
AC) from minimal network voltage (V
AC-MIN) begin to fluctuate,
Network voltage (V
AC) have a network (f
AC), and
Induction motor (10) is designed to rated operational voltage (V
NM) and nominal operation frequency (f
NM),
Described assembly is characterised in that:
Induction motor (10) has the minimal network of being lower than voltage (V
AC-MIN) rated operational voltage (V
NM),
Processing unit (8) Measurement Network frequency (f
AC), and
As network (f
AC) and nominal operation frequency (f
NM) between when there are differences, processing unit (8) is determined the rated voltage (V after the change
NM-A) value, this change after rated voltage (V
NM-A) be applied on the induction motor (10), and
As network (f
AC) equal nominal operation frequency (f
NM) time, processing unit is with controlled voltage (V
c) value change to rated voltage (V
NM) level.
2. assembly according to claim 1 is characterized in that, the rated voltage (V after the change
NM-A) value be corrected as function and the described correction and the network (f of network
AC) value and the nominal operation frequency (f of induction motor (10)
NM) difference proportional.
3. assembly according to claim 1 and 2 is characterized in that, processing unit (8) is with network voltage (V
AC) value be reduced to controlled voltage (V
c) value, this controlled voltage (V
c) value be lower than minimal network voltage (V
AC-MIN) value.
4. according to claim 1,2 or 3 described assemblies, it is characterized in that processing unit (8) comprises first and second voltage measuring apparatus (4,11),
First voltage measuring apparatus (4) Measurement Network voltage (V
AC), and second voltage measuring apparatus (11) is measured controlled voltage (V
c),
Processing unit (8) is controlled controlled voltage (V according to the measurement of first and second voltage measuring apparatus (4,11)
c) level.
5. assembly according to claim 4 is characterized in that, control system (1) comprises the one group of switch (6,7) by CPU (8) control, and this group switch (6,7) comprising:
-with the run switch (6) of the operation winding electric of induction motor (10) interconnection; And
-with the starting switch (7) of the startup winding electric of induction motor (10) interconnection;
When induction motor (10) when just starting, start the processed center of winding (8) and optionally encourage;
Treatment circuit (8) is with network voltage (V
AC) be applied on startup winding and the operation winding.
6. assembly according to claim 5 is characterized in that, when the previous time of determining that is used for actuating motor had finished, processing unit (8) order disconnected the switch (7) of the startup winding of induction motor (10).
7. the control system (1) of a monocyclic-start induction motor (10), this control system comprise and network voltage (V
AC) CPU (8) that is associated, this processing unit can be associated with induction motor (10),
Induction motor (10) has rated operational voltage (V
N),
Network voltage (V
AC) from minimal network voltage (V
AC-MIN) begin to fluctuate,
By from network voltage (V
AC) controlled voltage (V that obtains
C) give induction motor (10) feed, adjust this controlled voltage (V by CPU (8)
C),
Induction motor (10) has rated operational voltage (V
NM),
The system is characterized in that:
Minimal network voltage (V
AC-MIN) value be higher than the rated operational voltage (V of induction motor (10)
NM) value,
CPU (8) is with controlled voltage (V
C) be adjusted into network voltage (V
AC) the function of variation, and when starting with network voltage (V
AC) be applied on the induction motor (10).
8. according to the system of claim 7, it is characterized in that comprising:
-the first and second voltage measuring apparatus (4,11);
-Measurement Network voltage (V
AC) network (f
AC) frequency sensor (5), and
Induction motor (10) has the minimal network of being lower than voltage (V
AC-MIN) the rated operational voltage (V of value
NM),
Processing unit (8) Measurement Network frequency (f
AC), and
As network (f
AC) and nominal operation frequency (f
NM) between when there are differences, processing unit (8) is determined the rated voltage (V after the change
NM-A) value, this change after rated voltage (V
NM-A) value be corrected as network (f
AC) function, and should proofread and correct and network (f
AC) value and the nominal operation frequency (f of induction motor (10)
NM) difference proportional, this change after rated voltage (V
NM-A) be applied on the induction motor (10), and
As network (f
AC) equal nominal operation frequency (f
NM) time, processing unit is with controlled voltage (V
c) value change to rated voltage (V
NM) level.
9. system according to claim 8 is characterized in that comprising the starting switch (7) that can interconnect with the startup winding electric of induction motor (10),
When induction motor (10) when just starting, optionally encourage according to starting switch (7) by processing center (8) to start winding,
Treatment circuit (8) is with network voltage (V
AC) be applied on the startup winding.
10. system according to claim 9 is characterized in that, treatment circuit (8) applies network voltage (V in start-up time
AC), this start-up time is corresponding to making induction motor (10) be in the required time of specified rotation basically.
11. the method for a control monocyclic-start induction motor (10), this induction motor (10) has rated operational voltage (V
NM) and nominal operation frequency (f
NM), by passing through to network voltage (V
AC) modulate and the controlled voltage (V that obtains
c) to this induction motor (10) feed, network voltage (V
AC) have a network (f
AC),
Described method is characterised in that and may further comprise the steps:
(a) Measurement Network voltage (V
AC), controlled voltage (V
c) and network (f
AC),
(b) more measured network (f
AC) value and nominal operation frequency (f
NM), and as network (f
AC) and nominal operation frequency (f
NM) between when there are differences,
Rated voltage (V after determining to change
NM-A) value and will be in change after rated voltage (V
NM-A) controlled voltage (V
c) be applied on the induction motor (10), and
As network (f
AC) equal nominal operation frequency (f
NM) time, with controlled voltage (V
c) be adjusted into rated voltage (V
NM) level.
12. the method according to claim 11 is characterized in that, in step (a) before, when actuating motor (10), has following steps, is about to equal network voltage (V
AC) controlled voltage (V
c) be applied on the startup winding and operation winding of induction motor (10).
13. the method according to claim 11 is characterized in that, in step (a) before, when actuating motor (10), has following steps, is about to be lower than network voltage (V
AC) controlled voltage (V
c) be applied on the startup winding and operation winding of induction motor (10).
14. the method according to claim 12 or 13 is characterized in that, network voltage (V
AC) being applied in start-up time to the startup winding of induction motor (10) be held, this start-up time is corresponding to making induction motor be in the required time of specified rotation basically.
15. a compressor is characterized in that activating by monocyclic-start induction motor (10), this induction motor (10) comprises as the control system (1) defined at claim 7-10.
Claims (15)
1. one kind has rated operational voltage (V
NM) induction motor (10) control system (1)/induction motor (10) assembly,
Control system (1) comprises CPU (8), and described CPU (8) is with network voltage (V
AC) level modulation be controlled voltage (V
C) level, described controlled voltage (V
C) be applied on the induction motor (10),
Network voltage (V
AC) from minimal network voltage (V
AC-MIN) begin to fluctuate,
Network voltage (V
AC) have a network (f
AC), and
Induction motor (10) is designed to rated operational voltage (V
NM) and nominal operation frequency (f
NM),
Described assembly is characterised in that:
Induction motor (10) has the minimal network of being lower than voltage (V
AC-MIN) rated operational voltage (V
NM),
Processing unit (8) Measurement Network frequency (f
AC), and
As network (f
AC) and nominal operation frequency (f
NM) between when there are differences, processing unit (8) is determined the rated voltage (V after the change
NM-A) value, this change after rated voltage (V
NM-A) be applied on the induction motor (10), and
As network (f
AC) equal network (f
AC) time, processing unit is with controlled voltage (V
c) value change to rated voltage (V
NM) level.
2. assembly according to claim 1 is characterized in that, the rated voltage (V after the change
NM-A) value be corrected as function and the described correction and the network (f of network
AC) value and the nominal operation frequency (f of induction motor (10)
NM) difference proportional.
3. assembly according to claim 1 and 2 is characterized in that, processing unit (8) is with network voltage (V
AC) value be reduced to controlled voltage (V
c) value, this controlled voltage (V
c) value be lower than minimal network voltage (V
AC-MIN) value.
4. according to claim 1,2 or 3 described assemblies, it is characterized in that processing unit (8) comprises first and second voltage measuring apparatus (4,11),
First voltage measuring apparatus (4) Measurement Network voltage (V
AC), and second voltage measuring apparatus (11) is measured controlled voltage (V
c),
Processing unit (8) is controlled controlled voltage (V according to the measurement of first and second voltage measuring apparatus (4,11)
c) level.
5. assembly according to claim 4 is characterized in that, control system (1) comprises the one group of switch (6,7) by CPU (8) control, and this group switch (6,7) comprising:
-with the run switch (6) of the operation winding electric of induction motor (10) interconnection; And
-with the starting switch (7) of the startup winding electric of induction motor (10) interconnection;
When induction motor (10) when just starting, start the processed center of winding (8) and optionally encourage;
Treatment circuit (8) is with network voltage (V
AC) be applied on startup winding and the operation winding.
6. assembly according to claim 5 is characterized in that, when the previous time of determining that is used for actuating motor had finished, processing unit (8) order disconnected the switch (7) of the startup winding of induction motor (10).
7. the control system (1) of an induction motor (10), this control system comprise and network voltage (V
AC) CPU (8) that is associated, this processing unit can be associated with induction motor (10),
This induction motor (10) has rated operational voltage (V
N),
Network voltage (V
AC) from minimal network voltage (V
AC-MIN) begin to fluctuate,
By from network voltage (V
AC) controlled voltage (V that obtains
C) give induction motor (10) feed, adjust this controlled voltage (V by CPU (8)
C),
Induction motor (10) has rated operational voltage (V
NM),
The system is characterized in that:
Minimal network voltage (V
AC-MIN) value be higher than the rated operational voltage (V of induction motor (10)
NM) value,
CPU (8) is with controlled voltage (V
C) be adjusted into network voltage (V
AC) the function of variation, and when starting with network voltage (V
AC) be applied on the induction motor (10).
8. system according to claim 7 is characterized in that comprising:
-the first and second voltage measuring apparatus (4,11);
-Measurement Network voltage (V
AC) network (f
AC) frequency sensor (5), and
Induction motor (10) has the minimal network of being lower than voltage (V
AC-MIN) the rated operational voltage (V of value
NM),
Processing unit (8) Measurement Network frequency (f
AC), and
As network (f
AC) and nominal operation frequency (f
NM) between when there are differences, processing unit (8) is determined the rated voltage (V after the change
NM-A) value, this change after rated voltage (V
NM-A) value be corrected as the function of network, and should proofread and correct and network (f
AC) value and the nominal operation frequency (f of induction motor (10)
NM) difference proportional, this change after rated voltage (V
NM-A) be applied on the induction motor (10), and
As network (f
AC) equal network (f
AC) time, processing unit is with controlled voltage (V
c) value change to rated voltage (V
NM) level.
9. system according to claim 8 is characterized in that comprising the starting switch (7) that can interconnect with the startup winding electric of induction motor (10),
When induction motor (10) when just starting, optionally encourage according to starting switch (7) by processing center (8) to start winding,
Treatment circuit (8) is with network voltage (V
AC) be applied on the startup winding.
10. system according to claim 9 is characterized in that, treatment circuit (8) applies network voltage (V in start-up time
AC), this start-up time is corresponding to making induction motor (10) be in the required time of specified rotation basically.
11. the method for a control of induction (10), this induction motor (10) has rated operational voltage (V
NM) and nominal operation frequency (f
NM), by passing through to network voltage (V
AC) modulate and the controlled voltage (V that obtains
c) to this induction motor (10) feed, network voltage (V
AC) have a network (f
AC),
Described method is characterised in that and may further comprise the steps:
(a) Measurement Network voltage (V
AC), controlled voltage (V
c) and network (f
AC),
(b) more measured network (f
AC) value and nominal operation frequency (f
NM), and as network (f
AC) and nominal operation frequency (f
NM) between when there are differences,
Rated voltage (V after determining to change
NM-A) value and will be in change after rated voltage (V
NM-A) controlled voltage (V
c) be applied on the induction motor (10), and
As network (f
AC) equal nominal operation frequency (f
NM) time, with controlled voltage (V
c) be adjusted into rated voltage (V
NM) level.
12. method according to claim 11 is characterized in that, in step (a) before, when actuating motor (10), has following steps, is about to equal network voltage (V
AC) controlled voltage (V
c) be applied on the startup winding and operation winding of induction motor (10).
13. method according to claim 11 is characterized in that, in step (a) before, when actuating motor (10), has following steps, is about to be lower than network voltage (V
AC) controlled voltage (V
c) be applied on the startup winding and operation winding of induction motor (10).
14., it is characterized in that network voltage (V according to claim 12 or 13 described methods
AC) being applied in start-up time to the startup winding of induction motor (10) be held, this start-up time is corresponding to making induction motor be in the required time of specified rotation basically.
15. a compressor is characterized in that activating by induction motor (10), this motor comprises as the control system (1) defined at claim 7-10.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BRPI03053385 | 2003-11-28 | ||
| BRPI0305338 | 2003-11-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1886886A true CN1886886A (en) | 2006-12-27 |
| CN100539386C CN100539386C (en) | 2009-09-09 |
Family
ID=36928313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800353578A Expired - Fee Related CN100539386C (en) | 2003-11-28 | 2004-11-24 | Induction motor control system |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP1706939A1 (en) |
| JP (1) | JP4598776B2 (en) |
| KR (1) | KR101074557B1 (en) |
| CN (1) | CN100539386C (en) |
| AR (1) | AR046667A1 (en) |
| BR (1) | BRPI0305338B1 (en) |
| EC (1) | ECSP066680A (en) |
| MX (1) | MXPA06005527A (en) |
| WO (1) | WO2005053147A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102460939A (en) * | 2009-05-22 | 2012-05-16 | 阿塞里克股份有限公司 | Arrangement for starting a single phase induction motor |
| CN109713943A (en) * | 2019-03-12 | 2019-05-03 | 浙江汇迅骏机电技术有限公司 | A kind of time variant voltage electric motor starting method |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BRPI0700844A (en) | 2007-03-20 | 2008-11-04 | Whirlpool Sa | electric motor driven compressor control system, electronic induction and control electric motor assembly, motor compressor arrangement and electric motor control method |
| KR101996838B1 (en) | 2015-05-26 | 2019-07-08 | 엘에스산전 주식회사 | System of controlling induction motor |
| CN115018172B (en) * | 2022-06-16 | 2024-06-14 | 国网湖南省电力有限公司 | Real-time judging method for proportion of induction motor in power grid comprehensive load model |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4636702A (en) * | 1984-08-09 | 1987-01-13 | Louis W. Parker | Energy economizer controlled-current start and protection for induction motors |
| DE3728983C1 (en) * | 1987-08-29 | 1988-12-22 | Grundfos Internat A S | Single-phase asynchronous motor |
| KR0153103B1 (en) * | 1995-05-23 | 1998-12-15 | 김태승 | Apparatus for input power control of induction motor |
| AU7616096A (en) * | 1995-11-30 | 1997-06-19 | William Harry Kemp | Current modulation motor controller |
-
2003
- 2003-11-28 BR BRPI0305338A patent/BRPI0305338B1/en not_active IP Right Cessation
-
2004
- 2004-11-24 CN CNB2004800353578A patent/CN100539386C/en not_active Expired - Fee Related
- 2004-11-24 EP EP04797150A patent/EP1706939A1/en not_active Withdrawn
- 2004-11-24 WO PCT/BR2004/000233 patent/WO2005053147A1/en active Application Filing
- 2004-11-24 JP JP2006540107A patent/JP4598776B2/en not_active Expired - Fee Related
- 2004-11-24 MX MXPA06005527A patent/MXPA06005527A/en active IP Right Grant
- 2004-11-24 AR ARP040104347A patent/AR046667A1/en active IP Right Grant
- 2004-11-24 KR KR1020067011035A patent/KR101074557B1/en not_active IP Right Cessation
-
2006
- 2006-06-28 EC EC2006006680A patent/ECSP066680A/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102460939A (en) * | 2009-05-22 | 2012-05-16 | 阿塞里克股份有限公司 | Arrangement for starting a single phase induction motor |
| CN102460939B (en) * | 2009-05-22 | 2015-05-06 | 阿塞里克股份有限公司 | Arrangement for starting a single phase induction motor |
| CN109713943A (en) * | 2019-03-12 | 2019-05-03 | 浙江汇迅骏机电技术有限公司 | A kind of time variant voltage electric motor starting method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100539386C (en) | 2009-09-09 |
| BRPI0305338B1 (en) | 2016-04-19 |
| JP2007535283A (en) | 2007-11-29 |
| ECSP066680A (en) | 2006-11-24 |
| AR046667A1 (en) | 2005-12-14 |
| WO2005053147A1 (en) | 2005-06-09 |
| KR101074557B1 (en) | 2011-10-17 |
| BR0305338A (en) | 2005-07-12 |
| JP4598776B2 (en) | 2010-12-15 |
| KR20060121135A (en) | 2006-11-28 |
| EP1706939A1 (en) | 2006-10-04 |
| MXPA06005527A (en) | 2006-08-17 |
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