CN108226780A - A kind of permanent-magnetic synchronous motor stator current detecting system and method - Google Patents
A kind of permanent-magnetic synchronous motor stator current detecting system and method Download PDFInfo
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- CN108226780A CN108226780A CN201810074232.XA CN201810074232A CN108226780A CN 108226780 A CN108226780 A CN 108226780A CN 201810074232 A CN201810074232 A CN 201810074232A CN 108226780 A CN108226780 A CN 108226780A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
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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
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- Control Of Ac Motors In General (AREA)
Abstract
The present invention is suitable for motor control technology field, provides a kind of permanent-magnetic synchronous motor stator current detecting system and method, which includes：Power module；The output terminal of power module and the input terminal of electric machine controller connect, and bus current sensor is equipped on the end of electric machine controller input；Electric machine controller is connect by input terminal of the IGBT power switch respectively with motor three-phase, and U phase currents sensor, V phase currents sensor and W phase current sensors are respectively equipped on the input terminal of motor three-phase.Bus current sensor, U phase currents sensor, V phase currents sensor and W phase currents sensor are communicated to connect with electric machine controller., can be to the reconstruct of three-phase current when a current sensor in three-phase current sensor breaks down, therefore after some three-phase current sensor failure, remain to realize the detection to three-phase current, do not influence the normal operation of motor.
Description
Technical field
The invention belongs to motor control technology fields, provide a kind of permanent-magnetic synchronous motor stator current detecting system and side
Method.
Background technology
The most important working component of motor is stator and rotor, and stator is the stationary part of motor, is fixed on
On shell, stator is made of engine base, stator core and stator winding three parts, and the main function of stator is to generate rotating excitation field,
And the effect of rotor generates the magnetic field interaction of a magnetic field and stator, forms torque.Magneto control technology is to adjust
The technology of the voltage of stator, current value and sequential, electric machines control technology develop to Fuzzy Control from initial basic PID control
The combination of the intelligent control algorithms such as system, particle group control, neuron control, Direct Torque Control or even several control algolithms.Nothing
By being vector control method or Direct Torque Control, it is required for detecting each phase stator current in real time.
In the prior art, it is that each phase current is detected using three current sensors, then measured stator is sat
Phase current under mark calculates the two-phase alternating current under orthogonal static α β coordinates using Clarke transformation, and then according to rotor position
Angle setting θ simultaneously changes commanders two-phase-current transformation as orthogonal rotation d using Park changesqTwo DC current i under coordinated、iq.The prior art
It is very high for current detecting and the real-time that converts, accuracy, reliability requirement, if some electric current in three current sensors
Sensor breaks down, and causes current detecting abnormal or in the case that current detection signal is interfered, is by directly affecting
The control performance of system, even resulting in motor cannot work.
Invention content
The embodiment of the present invention provides a kind of permanent-magnetic synchronous motor stator electric current detecting method, it is intended to solve electric when detecting each phase
When a current sensor in three current sensors of stream breaks down, cause current detecting exception or motor that cannot work
The problem of.
The invention is realized in this way a kind of permanent-magnetic synchronous motor stator electric current puts detecting system, the system comprises：
Power module；
The output terminal of power module and the input terminal of electric machine controller connect, and mother is equipped on the end of electric machine controller input
Line current sensor；
Electric machine controller is connect by input terminal of the IGBT power switch respectively with motor three-phase, in the input of motor three-phase
U phase currents sensor, V phase currents sensor and W phase current sensors are respectively equipped on end；
Bus current sensor, U phase currents sensor, V phase currents sensor and W phase currents sensor with motor control
Device communication connection processed.
The invention is realized in this way a kind of permanent-magnetic synchronous motor stator electric current puts detection method, the method includes such as
Lower step：
Bus current sensor is for detecting the electric current of input electric machine controller, and by the defeated of the electric machine controller detected
Enter electric current and be sent to electric machine controller；
U phase currents sensor, V phase currents sensor and W phase current sensors are respectively used to detection input motor U phases, V
The electric current of phase and W phases, and the electric current of input motor three-phase checked is sent to electric machine controller；
If in U phase currents sensor, V phase currents sensor and W phase current sensors, there are an abnormality of current sensor
Or during failure, electric machine controller based on bus current sensor detect input electric machine controller electric current and normal two-phase
The biphase current of input motor that current sensor detects reconstructs three-phase current.
Further, U phase currents sensor, V phase currents sensor or W phase current sensor abnormality recognition methods are specific
It is as follows：
Electric machine controller detects U phase currents sensor, V phase currents biography based on the relationship between the three-phase current of input motor
Abnormal current sensor in sensor and W phase current sensors.
Further, the recognition methods of bus current sensor abnormality is specific as follows：
If electric machine controller detects that U phase currents sensor, V phase currents sensor and W phase current sensors are normal,
It is whether abnormal that bus current sensor is then detected based on the relationship between electric machine controller input current and three-phase current.
Further, bus current sensor, U phase currents sensor, V phase currents sensor and W phase current sensors are equal
For current divider, Hall current sensor or electric current induction coil.
Permanent-magnetic synchronous motor stator electric current detecting method provided in an embodiment of the present invention has the beneficial effect that：
1) when a current sensor in three-phase current sensor breaks down, can to the reconstruct of three-phase current, because
This remains to realize the detection to three-phase current, does not influence the normal operation of motor after some three-phase current sensor failure；
2) motor controls the three-phase current based on input motor in real time and inputs the electric current of electric machine controller to judge three-phase
With the presence or absence of abnormal current sensor in current sensor, and based on normal biphase current and electric machine controller input current
Three-phase current is reconstructed, the advantageous accuracy for improving three-phase current detection；
3) abnormal current sensor is detected, only abnormal current sensor can be replaced, reduce and safeguard
Cost.
Description of the drawings
Fig. 1 is the structure diagram of permanent-magnetic synchronous motor stator current detecting system provided in an embodiment of the present invention；
1. power module, 2. bus current sensors, 3. electric machine controllers, 4 motors, 5.U phase currents sensor, 6.V phases
Current sensor, 7.W phase current sensors.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Fig. 1 is the structure diagram of permanent-magnetic synchronous motor stator current detecting system provided in an embodiment of the present invention, in order to
Convenient for explanation, only show and the relevant part of the embodiment of the present invention.
The system includes：
Power module；
The output terminal of power module and the input terminal of electric machine controller connect, and mother is equipped on the end of electric machine controller input
Line current sensor；
Electric machine controller is connect by input terminal of the IGBT power switch respectively with motor three-phase, in the input of motor three-phase
U phase currents sensor, V phase currents sensor and W phase current sensors are respectively equipped on end；
In embodiments of the present invention, U phase current sensors are equipped in the U phases input terminal of motor, in the V phase input terminals of motor
Equipped with V phase current sensors, the W phases input terminal of motor is equipped with W phase current sensors.
Bus current sensor, U phase currents sensor, V phase currents sensor and W phase currents sensor with motor control
Device communication connection processed.
Permanent-magnetic synchronous motor stator electric current detecting method packet based on above-mentioned permanent-magnetic synchronous motor stator current detecting system
Include following steps：
Bus current sensor is for detecting the electric current of input electric machine controller, and by the defeated of the electric machine controller detected
Enter electric current and be sent to electric machine controller；
U phase currents sensor, V phase currents sensor and W phase current sensors are respectively used to detection input motor three-phase
The electric current of (three-phase is U phases, V phases and W phases), and the electric current of input motor three-phase checked is sent to electric machine controller；
If in U phase currents sensor, V phase currents sensor and W phase current sensors, there are an abnormality of current sensor
Or during failure, electric machine controller based on bus current sensor detect input electric machine controller electric current and normal two-phase
The biphase current of input motor that current sensor detects reconstructs three-phase current.
In the present invention, abnormality of current sensor refers to that current sensor sends the electric current of detection to electric machine controller,
But the current anomaly of detection, current sensor faults refer to that current sensor stops the electricity being detected to electric machine controller transmission
Stream.
In embodiments of the present invention, U phase currents sensor, V phase currents sensor or the identification of W phase currents sensor abnormality
Method is specific as follows：
Electric machine controller detects U phase currents sensor, V phase currents biography based on the relationship between the three-phase current of input motor
Abnormal current sensor in sensor and W phase current sensors.
Bus current sensor abnormality recognition methods is specific as follows：
If electric machine controller detects that U phase currents sensor, V phase currents sensor and W phase current sensors are normal,
It is whether abnormal that bus current sensor is then detected based on the relationship between electric machine controller input current and three-phase current.
In the present invention, bus current sensor, U phase currents sensor, V phase currents sensor and W phase current sensors
It is current divider, Hall current sensor or electric current induction coil.
Permanent-magnet synchronous stator current detection method provided by the invention has the advantages that：
1) when a current sensor in three-phase current sensor breaks down, can to the reconstruct of three-phase current, because
This remains to realize the detection to three-phase current, does not influence the normal operation of motor after some three-phase current sensor failure；
2) motor controls the three-phase current based on input motor in real time and inputs the electric current of electric machine controller to judge three-phase
With the presence or absence of abnormal current sensor in current sensor, and based on normal biphase current and electric machine controller input current
Three-phase current is reconstructed, the advantageous accuracy for improving three-phase current detection；
3) abnormal current sensor is detected, only abnormal current sensor can be replaced, reduce and safeguard
Cost.
The upper only presently preferred embodiments of the present invention, is not intended to limit the invention, all spirit in the present invention
With all any modification, equivalent and improvement made within principle etc., should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of permanent-magnetic synchronous motor stator current detecting system, which is characterized in that the system comprises：
Power module；
The output terminal of power module and the input terminal of electric machine controller connect, and busbar electricity is equipped on the end of electric machine controller input
Flow sensor；
Electric machine controller is connect by input terminal of the IGBT power switch respectively with motor three-phase, on the input terminal of motor three-phase
It is respectively equipped with U phase currents sensor, V phase currents sensor and W phase current sensors；
Bus current sensor, U phase currents sensor, V phase currents sensor and W phase currents sensor are and electric machine controller
Communication connection.
2. the stator current detection method of permanent-magnetic synchronous motor stator current detecting system as described in claim 1, feature exist
In described method includes following steps：
Bus current sensor inputs the electric current of electric machine controller for detecting, and the input of the electric machine controller detected is electric
Stream is sent to electric machine controller；
U phase currents sensor, V phase currents sensor and W phase current sensors be respectively used to detection input motor U phases, V phases and
The electric current of W phases, and the electric current of input motor three-phase checked is sent to electric machine controller；
If there are an abnormality of current sensor or events in U phase currents sensor, V phase currents sensor and W phase current sensors
During barrier, electric machine controller based on bus current sensor detect input electric machine controller electric current and normal biphase current
The biphase current of input motor that sensor detects reconstructs three-phase current.
3. permanent-magnetic synchronous motor stator electric current detecting method as claimed in claim 2, which is characterized in that U phase currents sensor, V
Phase current sensor or W phase current sensor abnormality recognition methods are specific as follows：
Electric machine controller detects U phase currents sensor, V phase currents sensing based on the relationship between the three-phase current of input motor
Abnormal current sensor in device and W phase current sensors.
4. permanent-magnetic synchronous motor stator electric current detecting method as claimed in claim 2, which is characterized in that bus current sensor is different
Normal recognition methods is specific as follows：
If electric machine controller detects that U phase currents sensor, V phase currents sensor and W phase current sensors are normal, base
Whether the relationship between electric machine controller input current and three-phase current is abnormal to detect bus current sensor.
5. permanent-magnetic synchronous motor stator electric current detecting method as claimed in claim 2, which is characterized in that bus current sensor, U
Phase current sensor, V phase currents sensor and W phase current sensors are current divider, Hall current sensor or electric current sensing
Coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810074232.XA CN108226780A (en) | 2018-01-25 | 2018-01-25 | A kind of permanent-magnetic synchronous motor stator current detecting system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810074232.XA CN108226780A (en) | 2018-01-25 | 2018-01-25 | A kind of permanent-magnetic synchronous motor stator current detecting system and method |
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| CN108226780A true CN108226780A (en) | 2018-06-29 |
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| CN201810074232.XA Pending CN108226780A (en) | 2018-01-25 | 2018-01-25 | A kind of permanent-magnetic synchronous motor stator current detecting system and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954846A (en) * | 2019-10-11 | 2020-04-03 | 珠海格力电器股份有限公司 | Hall current sensor disconnection detection method, computer readable storage medium and intelligent device |
| CN112532138A (en) * | 2020-12-26 | 2021-03-19 | 陕西航空电气有限责任公司 | Current redundancy method for aviation general motor controller of two-level three-phase inversion topology |
| CN116449142A (en) * | 2023-06-19 | 2023-07-18 | 潍柴动力股份有限公司 | Current sensor detection method, device, bench test system and storage medium |
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| CN103248307A (en) * | 2013-05-24 | 2013-08-14 | 哈尔滨工业大学 | Fault diagnosis method for current sensor in induction motor speed regulating system |
| CN105656377A (en) * | 2016-04-11 | 2016-06-08 | 中国矿业大学 | Fault-tolerant control method of current sensor of permanent magnet synchronous motor |
| CN206533310U (en) * | 2017-03-20 | 2017-09-29 | 中国矿业大学 | A kind of single resistance sampling bus current reconstructs the device of permagnetic synchronous motor phase current |
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2018
- 2018-01-25 CN CN201810074232.XA patent/CN108226780A/en active Pending
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| CN103248307A (en) * | 2013-05-24 | 2013-08-14 | 哈尔滨工业大学 | Fault diagnosis method for current sensor in induction motor speed regulating system |
| CN105656377A (en) * | 2016-04-11 | 2016-06-08 | 中国矿业大学 | Fault-tolerant control method of current sensor of permanent magnet synchronous motor |
| CN206533310U (en) * | 2017-03-20 | 2017-09-29 | 中国矿业大学 | A kind of single resistance sampling bus current reconstructs the device of permagnetic synchronous motor phase current |
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| 李宏伟;付勃;董海鹰;杨立霞;王睿敏;: "基于单电流检测的电动变桨系统容错控制（英文）" * |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954846A (en) * | 2019-10-11 | 2020-04-03 | 珠海格力电器股份有限公司 | Hall current sensor disconnection detection method, computer readable storage medium and intelligent device |
| CN110954846B (en) * | 2019-10-11 | 2023-08-18 | 珠海格力电器股份有限公司 | Hall current sensor broken line detection method, computer readable storage medium and intelligent device |
| CN112532138A (en) * | 2020-12-26 | 2021-03-19 | 陕西航空电气有限责任公司 | Current redundancy method for aviation general motor controller of two-level three-phase inversion topology |
| CN116449142A (en) * | 2023-06-19 | 2023-07-18 | 潍柴动力股份有限公司 | Current sensor detection method, device, bench test system and storage medium |
| CN116449142B (en) * | 2023-06-19 | 2023-10-20 | 潍柴动力股份有限公司 | Current sensor detection method, device, bench test system and storage medium |
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