CN102545735A - Method for processing current static deviation of permanent magnet motor - Google Patents
Method for processing current static deviation of permanent magnet motor Download PDFInfo
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- CN102545735A CN102545735A CN2010105963360A CN201010596336A CN102545735A CN 102545735 A CN102545735 A CN 102545735A CN 2010105963360 A CN2010105963360 A CN 2010105963360A CN 201010596336 A CN201010596336 A CN 201010596336A CN 102545735 A CN102545735 A CN 102545735A
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- electric current
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- static deviation
- electrorheological
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Abstract
The invention relates to the field of current detecting methods, in particular to a method for processing current static deviation of a permanent magnet motor. The method for processing current static deviation of the permanent magnet motor comprises an initializing step and a current detecting step which are carried out successively, and is characterized in that after current is detected, current static deviation is calculated, and current is sampled during initialization so that i0 is measured; i' is measured when the current is detected; and an actual value of the current is obtained when the current static deviation is calculated. The method has the advantages that required equipment is simple, steps are simple, precision is high, and application range is wide.
Description
Technical field
The present invention relates to the detection method field of electric current, be specially a kind of method that magneto electric current static deviation is handled that is used for.
Background technology
Based on to the electric current of permagnetic synchronous motor and the accurate control of moment, require current sample to have certain precision.And current sample generally adopts current sensor to add the method for analog sampling circuit in the former control system for permanent-magnet synchronous motor, deducts the current value of theoretic deviate as reality with real-time detected current value.Because analog sampling is bigger with environmental impact; Add the reason such as consistency, biasing of components and parts itself; Make detected current signal exist deviation, if this deviation is not handled, in control; Can on motor windings, produce owing to detect the current offset that error is brought, this high-precision Torque Control and heat radiation for motor is disadvantageous.
Summary of the invention
In order to overcome the defective of prior art, provide a kind of, the invention discloses a kind of method that magneto electric current static deviation is handled that is used for.
The present invention reaches goal of the invention through following technical scheme:
A kind of method that is used for the processing of magneto electric current static deviation comprises the initialization and detection electric current carried out successively, it is characterized in that: also carry out the calculating of electric current static deviation after detecting electric current,
When initialization, carry out current sample; Current sample carries out through CPU Control current transducer as follows successively: a. reads the electrorheological value of analog/digital sampling channel; B. repeat a step at least 2 times, c. averages the electrorheological value that records, and this mean value is i
0
Read the electrorheological value of analog/digital sampling channel when detecting electric current through CPU Control current transducer, this electrorheological value is i';
When the electric current static deviation calculates, i' is deducted i through CPU control adder
0, gained difference be made as i, i is the actual value of electric current.
Describedly be used for the method that magneto electric current static deviation is handled, it is characterized in that: when current sample is carried out in initialization, repeat a step 8 time during the b step.
The present invention in initialization procedure, when actual current is zero, detects certain current i through behind the CPU electrification reset
0, i
0As bias current, in subsequent calculations with real-time detected current i ', deduct this bias current i
0, obtain actual current value i, promptly the detected current i of initialization
0As the zero point of subsequent current.Calculate the i value of gained as the actual value participation electric current loop calculating of electric current, pi mediation algorithm, transform vector etc., the zero drift in can the elimination system reduces the DC component in the AC system.
The present invention makes full use of the high speed property of control chip, in the power-up initializing process, increases the current sample function, in practical work process, has reduced the deviation of electric current, has increased the precision of control.Solve in the conventional method DC deviation that in electric system, exists that reasons such as consistency owing to components and parts, biasing are brought, the system that makes has more adaptability.The present invention detects applicable to the current zero of pure electronic and motor vehicle driven by mixed power with the servo magneto with magneto etc. of magneto, industry.The invention has the beneficial effects as follows: equipment needed thereby is simple, step is succinct, precision is high, applied widely.
Description of drawings
Fig. 1 is an initialized flow chart among the present invention;
Fig. 2 is the flow chart that detects electric current and current deviation calculating among the present invention.
Embodiment
Below further specify the present invention through specific embodiment.
Embodiment 1
A kind of method that is used for the processing of magneto electric current static deviation comprises that the initialization, detection electric current, the electric current static deviation that carry out successively calculate these 3 steps, and concrete steps are following:
When initialization, carry out current sample; The flow process of current sample is as shown in Figure 1; Current sample carries out through CPU Control current transducer as follows successively: a. reads the electrorheological value of analog/digital sampling channel, and b. repeats a step at least 2 times, and present embodiment repeats 8 times; C. the electrorheological value that records is averaged and carry out filtering to reduce interference, this mean value is i
0
The flow process that detects the calculating of electric current and current deviation is as shown in Figure 2; When detecting electric current; When the timer EOI; CPU Control current transducer reads the electrorheological value of analog/digital sampling channel, and is converted into the calculated value that down-stream can be used to the electrorheological value that reads, and this electrorheological value is i';
When the electric current static deviation calculates, i' is deducted i through CPU control adder
0, gained difference be made as i, i is the actual value of electric current.The I value of calculating gained can be used for the calculating of down-stream, like pi mediation algorithm, transform vector etc.
Claims (2)
1. one kind is used for the method that magneto electric current static deviation is handled, and comprises the initialization and detection electric current carried out successively, it is characterized in that: also carry out the calculating of electric current static deviation after detecting electric current,
When initialization, carry out current sample; Current sample carries out through CPU Control current transducer as follows successively: a. reads the electrorheological value of analog/digital sampling channel; B. repeat a step at least 2 times, c. averages the electrorheological value that records, and this mean value is i
0
Read the electrorheological value of analog/digital sampling channel when detecting electric current through CPU Control current transducer, this electrorheological value is i';
When the electric current static deviation calculates, i' is deducted i through CPU control adder
0, gained difference be made as i, i is the actual value of electric current.
2. as claimed in claim 1ly be used for the method that magneto electric current static deviation is handled, it is characterized in that: when current sample is carried out in initialization, repeat a step 8 time during the b step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105963360A CN102545735A (en) | 2010-12-20 | 2010-12-20 | Method for processing current static deviation of permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105963360A CN102545735A (en) | 2010-12-20 | 2010-12-20 | Method for processing current static deviation of permanent magnet motor |
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|---|---|
| CN102545735A true CN102545735A (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105963360A Pending CN102545735A (en) | 2010-12-20 | 2010-12-20 | Method for processing current static deviation of permanent magnet motor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429550A (en) * | 2015-12-31 | 2016-03-23 | 北京经纬恒润科技有限公司 | Current sampling error correction method and current sampling error correction system |
| CN106100483A (en) * | 2016-08-15 | 2016-11-09 | 珠海格力电器股份有限公司 | Motor control during the computational methods of bias current and system |
| CN106546934A (en) * | 2015-09-18 | 2017-03-29 | 比亚迪股份有限公司 | Zero shift rectifying method and apparatus when current of electric is sampled |
| CN110441589A (en) * | 2019-07-26 | 2019-11-12 | 康力电梯股份有限公司 | A kind of sampling of inverter current in line justification and bearing calibration |
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|---|---|---|---|---|
| JP2001346391A (en) * | 2000-05-31 | 2001-12-14 | Matsushita Electric Ind Co Ltd | Device and method for controlling ac servomotor |
| JP2002364551A (en) * | 2001-06-05 | 2002-12-18 | Mitsubishi Electric Corp | Motor driving device and compression equipment |
| CN1441908A (en) * | 2000-07-13 | 2003-09-10 | 株式会社安川电机 | Method for measuring motor constant of induction motor |
| CN1474192A (en) * | 2002-08-19 | 2004-02-11 | 乐金电子(天津)电器有限公司 | Detecting method for motor phase current |
| US6815920B2 (en) * | 2001-09-19 | 2004-11-09 | Parker-Hannifin Corporation | Motor driver and system with phase-spaced redundancy |
-
2010
- 2010-12-20 CN CN2010105963360A patent/CN102545735A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001346391A (en) * | 2000-05-31 | 2001-12-14 | Matsushita Electric Ind Co Ltd | Device and method for controlling ac servomotor |
| CN1441908A (en) * | 2000-07-13 | 2003-09-10 | 株式会社安川电机 | Method for measuring motor constant of induction motor |
| JP2002364551A (en) * | 2001-06-05 | 2002-12-18 | Mitsubishi Electric Corp | Motor driving device and compression equipment |
| US6815920B2 (en) * | 2001-09-19 | 2004-11-09 | Parker-Hannifin Corporation | Motor driver and system with phase-spaced redundancy |
| CN1474192A (en) * | 2002-08-19 | 2004-02-11 | 乐金电子(天津)电器有限公司 | Detecting method for motor phase current |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546934A (en) * | 2015-09-18 | 2017-03-29 | 比亚迪股份有限公司 | Zero shift rectifying method and apparatus when current of electric is sampled |
| CN105429550A (en) * | 2015-12-31 | 2016-03-23 | 北京经纬恒润科技有限公司 | Current sampling error correction method and current sampling error correction system |
| CN105429550B (en) * | 2015-12-31 | 2018-02-09 | 北京经纬恒润科技有限公司 | A kind of modification method and system of current sample deviation |
| CN106100483A (en) * | 2016-08-15 | 2016-11-09 | 珠海格力电器股份有限公司 | Motor control during the computational methods of bias current and system |
| CN110441589A (en) * | 2019-07-26 | 2019-11-12 | 康力电梯股份有限公司 | A kind of sampling of inverter current in line justification and bearing calibration |
| CN110441589B (en) * | 2019-07-26 | 2022-06-07 | 康力电梯股份有限公司 | Online confirming and correcting method for current sampling of frequency converter |
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Application publication date: 20120704 |