CN103259477A - Motor control method and circuit of inverter - Google Patents
Motor control method and circuit of inverter Download PDFInfo
- Publication number
- CN103259477A CN103259477A CN2013100522539A CN201310052253A CN103259477A CN 103259477 A CN103259477 A CN 103259477A CN 2013100522539 A CN2013100522539 A CN 2013100522539A CN 201310052253 A CN201310052253 A CN 201310052253A CN 103259477 A CN103259477 A CN 103259477A
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- Prior art keywords
- current
- error
- compensation
- current value
- drive motors
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Classifications
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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
- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
Abstract
The invention relates to a motor control method of an inverter. The method comprises a step of current induction where a current value is measured with respect to a drive motor, a step of first error calculation and compensation where the error of the first current value undergoing the step of current induction is calculated under the condition that the operation of the drive motor is activated and a first compensation value is calculated for compensation of the error of the first current value, and a step of current control where error compensation is performed through the first compensation value calculated through the step of first error calculation and compensation and thus current control of the drive motor is performed. The method can perform error compensation with respect to the induction current even during operation of the drive motor and thus can control the motor more accurately than a conventional method.
Description
Technical field
The present invention relates to the motor control method of frequency converter, specifically is for improvement of the motor control method of the frequency converter of the electric current inducing method of motor and the circuit for controlling motor of frequency converter.
Background technology
Fig. 1 is the structure chart of programmed logic of the motor control method of explanation traditional frequency conversion device.According to Fig. 1, the motor control method of traditional frequency conversion device is by piece 1(electric current influence error computing block), piece 2(electric current sensor block), piece 3(is based on the piece that detects the Current Control current of electric) constitute.
Especially, accurately the accurate induction of electric current is one of key factor of control motor torque.
But according to the motor control method of traditional frequency converter, the offset current sensor errors can not accurately be controlled current of electric because being in operation.In other words, utilize the motor control method of traditional frequency conversion device not to be in operation and detect current sensor offset(error), current sensor offset(electric current ' OA ' state that detects before also needing to utilize operation in the middle of operation) therefore offset current sensor error is in operation and still utilizes the current sensor error of ' OA ' non-change and have the defective that can't accurately compensate and can't accurately control motor.
[look-ahead technique document]
[patent documentation]
KR10-2010-0036781A, 2010.04.08, accompanying drawing 3
Summary of the invention
Technical task
The object of the present invention is to provide the motor control method of the frequency converter of accurately implementing the error compensation of current sensor is improved the accuracy in the motor torque control in the middle of a kind of operation the and the circuit for controlling motor of frequency converter.
Technical scheme
For realizing described purpose, one aspect of the present invention relates to the motor control method of frequency converter, and this implementation step comprises: the electric current induction, detect current value to drive motors; First error is calculated and compensation, under the state that the drive motors operation is activated, calculates the error of first current value that detects through described electric current sensing step, for the error that compensates described first current value is calculated first offset; The Current Control implementation step is implemented Current Control to drive motors by described first error is calculated and compensation process calculates first offset to described first current value enforcement error compensation.
Also comprise: second error is calculated and compensation process, under the state that the operation of drive motors is not activated, calculates second current value that detects through described electric current sensing step and is that the error of described second current value of compensation calculates second offset; Described Current Control implementation step is by by second offset that described second error is calculated and compensation process is calculated, and the Current Control to drive motors is implemented in enforcement to the error compensation of second current value.
Described first error is calculated and compensation process comprises following process: detect described first current value to drive motors, eliminate DC offset by high pass filter and low pass filter; Will be by eliminate described DC offset(dc error from described first current value) the current value eliminated of process subtract the current sensor DC composition feedback procedure of calculating output; The signal of exporting in the described current sensor DC composition feedback procedure and the electric current offset command signal of importing from the outside are relatively calculated the electric current offset control procedure of described first offset.
For realizing described purpose, the present invention relates to the circuit for controlling motor of frequency converter on the other hand, it is characterized in that, the circuit for controlling motor of this frequency converter comprises: current of electric controll block is used for driving frequency converter; Electric current offset compensates IOB, is divided into the state that the drive motors operation is activated and is not activated, and implements the error compensation of the current value of subtend drive motors detection; Current of electric controll block utilizes 3 phase induced currents of the drive motors (M) that the offset by described electric current offset compensation IOB detects being as the criterion with electric current dq_ instruction to compensate, and utilizes the offset current control drive motors of this compensation.
Described electric current offset compensation IOB is under the state that described drive motors operation is activated, and calculates the error of first current value that detects from drive motors and calculates first offset for described first current value error of compensation; Described current of electric controll block is by the error compensation of described first offset enforcement of calculating to described first current value, thereby implements the Current Control to drive motors.
Described electric current offset compensation IOB is under the state that is not activated of the operation at drive motors, calculates the error of second current value that detects from drive motors and calculates second offset for described second current value error of compensation; Described current of electric controll block is by the error compensation of described second offset enforcement of calculating to described second current value, thereby implements the Current Control to drive motors.
Described electric current offset compensation IOB is, detect described first current value and eliminate DC offset by high pass filter and low pass filter, the current value that enforcement will be eliminated by the process of eliminating described DC offset from described first current value subtracts the electric current induction DC composition feedback of calculating output, and signal that will output from described current sensor DC composition feedback compares with the electric current offset command signal from outside output and calculates described first offset.
Beneficial effect
The present invention controls than traditional more accurately implementing for motor in service also can the enforcement faradic error compensation of drive motors.
Description of drawings
Fig. 1 is the control program figure of the motor control method of traditional frequency conversion device.
Fig. 2 is the circuit for controlling motor structure chart of motor control method of the frequency converter of explanation one embodiment of the present of invention.
Fig. 3 is the control program figure of motor control method of the frequency converter of explanation one embodiment of the invention.
Among the figure:
1: the frequency converter circuit for controlling motor
10: current of electric controll block
12: current controller
14: principal axis transformation
16: frequency converter
20: current error compensation IOB
22: high pass filter
24: low pass filter
26: electric current offset controller
Embodiment
Describe below in conjunction with the motor control method of accompanying drawing to the frequency converter of one embodiment of the invention.Fig. 2 is the structure chart of frequency converter circuit for controlling motor of motor control method of the frequency converter of explanation one embodiment of the invention.
Frequency converter circuit for controlling motor 1 can be divided into current of electric controll block 10, electric current offset compensates IOB 20.Frequency converter circuit for controlling motor 1 is to survey drive motors M whether to move and be divided into the operation state that is activated and the state that operation is not swashed, and the current value that detects is implemented error compensation.
Current of electric controll block 10 is to utilize the three-phase induction electric current of the drive motors M that the offset by current error compensation IOB 20 detects being as the criterion with electric current dq_ instruction to compensate, according to the offset current control drive motors of this compensation.
Specifically be, current of electric controll block 10 is under the state that the operation of drive motors is activated, the electric current that utilization is imported by principal axis transformation 14 by the induced current of being implemented error compensation by first offset of electric current offset compensation IOB 20 compensation generates the driving signal by current controller 12, principal axis transformation 14 and frequency converter 16 and controls drive motors M.
Under the state that the operation of drive motors is not activated, utilize by second offset of electric current offset compensation IOB 20 compensation and implement error compensation.
Electric current offset compensation IOB 20 is made up of sub-pieces such as high pass filter 22, low pass filter 24 and electric current offset controllers 26 as shown in Figure 2.
Electric current offset controller 26 is to subtract calculation is eliminated DC offset by high pass filter 22 and low pass filter 24 current value from first current value that detects.Electric current offset controller 26 is that this current value and electric current offset command signal that subtracts calculation is compared, and calculates first offset for compensation first current value error.
Electric current offset compensation IOB 20 is also to generate second offset by the process identical with foregoing under the state that is not activated of the operation at drive motors.
Below according to Fig. 3, the motor control method of the frequency converter of one embodiment of the invention is described.At first, frequency converter circuit for controlling motor 1 is to judge drive motors whether be in operation (step S31) from the vehicle control device of interlock.
By the S31 step, the operation of drive motors is in when not being activated state, and frequency converter circuit for controlling motor 1 detects second current value, calculates the error (step S33) of the current value in the inoperative.
Then, frequency converter circuit for controlling motor 1 is to utilize the error of the current value of calculating to calculate second offset and implement error compensation (S34).Frequency converter circuit for controlling motor 1 is based on the error compensation of following enforcement drive motors M is implemented control.
When judging that by the S31 step drive motors is in operation, frequency converter circuit for controlling motor 1 detects first current value (step S36) of operating drive motors M.
Then, frequency converter circuit for controlling motor 1 detects first current value, calculates and implements error compensation (step S37) for controlling drive motors M after operating current value error is calculated first offset.
Then, frequency converter circuit for controlling motor 1 is to utilize current of electric controll block 10 feedbacks to be implemented the current value enforcement of error compensation to the Current Control (step S39) of drive motors M.
As mentioned above, according to the motor control method of the frequency converter of the embodiment of the invention, also can implement error compensation and than traditional Electric Machine Control of more accurately implementing in that drive motors M is in service.
Claims (7)
1. the motor control method of a frequency converter is characterized in that, this implementation step comprises:
The electric current induction detects current value to drive motors;
First error is calculated and compensation, under the state that the drive motors operation is activated, calculates the error of first current value that detects through described electric current sensing step, for the error that compensates described first current value is calculated first offset;
The Current Control implementation step is implemented Current Control to drive motors by described first error is calculated and compensation process calculates first offset to described first current value enforcement error compensation.
2. the motor control method of frequency converter according to claim 1 is characterized in that,
Also comprise:
Second error is calculated and compensation process, under the state that the operation of drive motors is not activated, calculates second current value that detects through described electric current sensing step and is that the error of described second current value of compensation calculates second offset;
Described Current Control implementation step is by by second offset that described second error is calculated and compensation process is calculated, and the Current Control to drive motors is implemented in enforcement to the error compensation of second current value.
3. the motor control method of frequency converter according to claim 1 is characterized in that,
Described first error is calculated and compensation process comprises following process:
Detect described first current value to drive motors, eliminate dc error by high pass filter and low pass filter;
To subtract the current sensor DC composition feedback procedure of calculating output by the current value that the process of eliminating described dc error from described first current value is eliminated;
The signal of exporting in the described current sensor DC composition feedback procedure and the current error command signal of importing from the outside are relatively calculated the current error control procedure of described first offset.
4. the circuit for controlling motor of a frequency converter is characterized in that,
Comprise:
Current of electric controll block is used for driving frequency converter;
Current error compensation IOB is divided into the state that the drive motors operation is activated and is not activated, and implements the error compensation of the current value of subtend drive motors detection;
Current of electric controll block utilizes the three-phase induction electric current of the drive motors (M) that the offset by described current error compensation IOB detects being as the criterion with electric current dq_ instruction to compensate, and utilizes the offset current control drive motors of this compensation.
5. the circuit for controlling motor of frequency converter according to claim 4 is characterized in that,
Described current error compensation IOB is under the state that described drive motors operation is activated, and calculates the error of first current value that detects from drive motors and calculates first offset for described first current value error of compensation;
Described current of electric controll block is by the error compensation of described first offset enforcement of calculating to described first current value, thereby implements the Current Control to drive motors.
6. the circuit for controlling motor of frequency converter according to claim 5 is characterized in that,
Described current error compensation IOB is under the state that is not activated of the operation at drive motors, calculates the error of second current value that detects from drive motors and calculates second offset for described second current value error of compensation;
Described current of electric controll block is by the error compensation of described second offset enforcement of calculating to described second current value, thereby implements the Current Control to drive motors.
7. the circuit for controlling motor of frequency converter according to claim 5 is characterized in that,
Described current error compensation IOB is, detect described first current value and eliminate dc error by high pass filter and low pass filter, the current value that enforcement will be eliminated by the process of eliminating described dc error from described first current value subtracts the electric current induction DC composition feedback of calculating output, and signal that will output from described current sensor DC composition feedback compares with the current error command signal from outside output and calculates described first offset.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2012-0016140 | 2012-02-17 | ||
| KR1020120016140A KR101883006B1 (en) | 2012-02-17 | 2012-02-17 | Motor control method of inverter |
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| Publication Number | Publication Date |
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| CN103259477A true CN103259477A (en) | 2013-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100522539A Pending CN103259477A (en) | 2012-02-17 | 2013-02-18 | Motor control method and circuit of inverter |
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| KR (1) | KR101883006B1 (en) |
| CN (1) | CN103259477A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102246044B1 (en) | 2013-12-31 | 2021-04-29 | 현대모비스 주식회사 | Apparatus and Method for sensing demagnetization of motor |
| KR102000060B1 (en) * | 2015-04-09 | 2019-07-18 | 엘에스산전 주식회사 | Apparatus for correcting offset of current sensor |
| KR101681155B1 (en) * | 2016-04-04 | 2016-12-12 | (주)우진에프에이 | Torque testing apparatus for torque converter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1874140A (en) * | 2005-06-03 | 2006-12-06 | 三星电子株式会社 | Speed control apparatus of vector controlled alternating current motor |
| CN101009474A (en) * | 2006-01-26 | 2007-08-01 | 圆创科技股份有限公司 | Brushless motor driving device |
| CN101927785A (en) * | 2009-06-26 | 2010-12-29 | 上海罗冠电子有限公司 | Electric power-assisted steering system with PMSM current sensor error self-correcting function |
| WO2011107773A2 (en) * | 2010-03-02 | 2011-09-09 | Trw Limited | Current sensor error compensation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100036781A (en) | 2008-09-30 | 2010-04-08 | 엘지전자 주식회사 | Motor controller |
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2012
- 2012-02-17 KR KR1020120016140A patent/KR101883006B1/en active IP Right Grant
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- 2013-02-18 CN CN2013100522539A patent/CN103259477A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1874140A (en) * | 2005-06-03 | 2006-12-06 | 三星电子株式会社 | Speed control apparatus of vector controlled alternating current motor |
| CN101009474A (en) * | 2006-01-26 | 2007-08-01 | 圆创科技股份有限公司 | Brushless motor driving device |
| CN101927785A (en) * | 2009-06-26 | 2010-12-29 | 上海罗冠电子有限公司 | Electric power-assisted steering system with PMSM current sensor error self-correcting function |
| WO2011107773A2 (en) * | 2010-03-02 | 2011-09-09 | Trw Limited | Current sensor error compensation |
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| Publication number | Publication date |
|---|---|
| KR20130094894A (en) | 2013-08-27 |
| KR101883006B1 (en) | 2018-07-27 |
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