CN207717941U - A kind of permanent-magnetic synchronous motor stator current detecting system - Google Patents
A kind of permanent-magnetic synchronous motor stator current detecting system Download PDFInfo
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- CN207717941U CN207717941U CN201820130590.3U CN201820130590U CN207717941U CN 207717941 U CN207717941 U CN 207717941U CN 201820130590 U CN201820130590 U CN 201820130590U CN 207717941 U CN207717941 U CN 207717941U
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Abstract
The utility model is suitable for motor control technology field, provides a kind of permanent-magnetic synchronous motor stator current detecting system, which includes：Power module；The output end 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 with the input terminal of motor three-phase respectively by IGBT power switch, 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 utility model belongs to motor control technology field, provides a kind of permanent-magnetic synchronous motor stator current detecting system
System.
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 in a magnetic field and stator, forms torque.Magneto control technology is to adjust
The voltage of stator, the technology of 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 to be detected to each phase current 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 the real-time of current detecting and transformation, accuracy, reliability requirement, if some electric current in three current sensors
Sensor breaks down, and in the case of causing current detecting exception or current detection signal to be interfered, is by directly affecting
The control performance of system, even resulting in motor cannot work.
Utility model content
The utility model embodiment provides a kind of permanent-magnetic synchronous motor stator current detecting system, it is intended to solve when detection is each
When a current sensor in three current sensors of phase current breaks down, cause current detecting exception or motor cannot
The problem of work.
The utility model is realized in this way a kind of permanent-magnetic synchronous motor stator electric current sets detecting system, the system packet
It includes：
Power module；
The output end 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 with the input terminal of motor three-phase respectively by IGBT power switch, 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.
Further, the bus current sensor is used to detect the electric current for inputting electric machine controller, and will detect
The input current of electric machine controller is 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 the 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 when failure, electric machine controller based on bus current sensor detect input electric machine controller electric current and normal two-phase
The biphase current of the input motor that current sensor detects reconstructs 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.
Further, electric machine controller detects U phase currents sensor, V phase currents based on the three-phase current of input motor
Abnormal current sensor in sensor and W phase current sensors.
Permanent-magnetic synchronous motor stator current detecting system provided by the utility model 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 judges three-phase based on the electric current of the three-phase current of input motor and input electric machine controller in real time
With the presence or absence of abnormal current sensor in current sensor, and it is 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.
Description of the drawings
Fig. 1 is the structural schematic diagram for the permanent-magnetic synchronous motor stator current detecting system that the utility model embodiment provides；
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 implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Fig. 1 is the structural schematic diagram for the permanent-magnetic synchronous motor stator current detecting system that the utility model embodiment provides,
For convenience of description, it only shows and the relevant part of the utility model embodiment.
The system includes：
Power module；
The output end 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 with the input terminal of motor three-phase respectively by IGBT power switch, 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 the utility model embodiment, U phase current sensors are equipped in the U phase input terminals of motor, it is defeated in the V phases of motor
Enter end and be equipped with V phase current sensors, the W phase input terminals of motor are 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.
In the present invention, bus current sensor is used to detect the electric current of input electric machine controller, and will detect
The input current of electric machine controller 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 the 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 when failure, electric machine controller based on bus current sensor detect input electric machine controller electric current and normal two-phase
The biphase current of the input motor that current sensor detects reconstructs three-phase current.
In the present invention, abnormality of current sensor refers to the electricity that current sensor sends detection to electric machine controller
Stream, but the current anomaly detected, current sensor faults refer to that current sensor stops detecting to electric machine controller transmission
Electric current.
In the present invention, bus current sensor, U phase currents sensor, V phase currents sensor and W phase currents pass
Sensor is current divider, Hall current sensor or electric current induction coil.
In the utility model embodiment, electric machine controller is passed based on the three-phase current of input motor to detect U phase currents
Abnormal current sensor in sensor, V phase currents sensor and W phase current sensors；
The recognition methods of U phase currents sensor, V phase currents sensor or W phase current sensor abnormalities is specific as follows：
Electric machine controller detects the sensing of the abnormal current in three-phase current sensor based on the three-phase current of input motor
Whether the three-phase current of device, i.e. detection input motor meets the correspondence between three-phase current.
The recognition methods of bus current sensor abnormality is specific as follows：
If electric machine controller detects that three-phase current sensor is normal, input current based on electric machine controller and defeated
Enter the three-phase current of motor to judge whether bus current sensor is abnormal, that is, whether the input current for detecting electric machine controller is full
Relationship between sufficient electric machine controller input current and three-phase current.
Permanent-magnet synchronous stator current detecting system provided by the utility model 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 judges three-phase based on the electric current of the three-phase current of input motor and input electric machine controller in real time
With the presence or absence of abnormal current sensor in current sensor, and it is 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.
The preferred embodiment of upper described only the utility model, is not intended to limit the utility model, all in this reality
All any modification, equivalent and improvement etc., should be included in the utility model made by within novel spirit and principle
Within protection domain.
Claims (4)
1. a kind of permanent-magnetic synchronous motor stator current detecting system, which is characterized in that the system comprises：
Power module；
The output end 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 with the input terminal of motor three-phase respectively by IGBT power switch, 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. permanent-magnetic synchronous motor stator current detecting system as described in claim 1, which is characterized in that
The bus current sensor is used to detect the electric current for inputting electric machine controller, and by the defeated of the electric machine controller detected
Enter electric current and 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 the input motor three-phase detected 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
When barrier, electric machine controller based on bus current sensor detect input electric machine controller electric current and normal biphase current
The biphase current of the input motor that sensor detects reconstructs three-phase current.
3. permanent-magnetic synchronous motor stator current detecting system as described in claim 1, which is characterized in that bus current senses
Device, U phase currents sensor, V phase currents sensor and W phase current sensors are current divider, Hall current sensor or electric current
Induction coil.
4. permanent-magnetic synchronous motor stator current detecting system as claimed in claim 2, which is characterized in that electric machine controller is based on
The three-phase current for inputting motor is electric to detect the exception in U phase currents sensor, V phase currents sensor and W phase current sensors
Flow sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820130590.3U CN207717941U (en) | 2018-01-25 | 2018-01-25 | A kind of permanent-magnetic synchronous motor stator current detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820130590.3U CN207717941U (en) | 2018-01-25 | 2018-01-25 | A kind of permanent-magnetic synchronous motor stator current detecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207717941U true CN207717941U (en) | 2018-08-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820130590.3U Active CN207717941U (en) | 2018-01-25 | 2018-01-25 | A kind of permanent-magnetic synchronous motor stator current detecting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207717941U (en) |
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2018
- 2018-01-25 CN CN201820130590.3U patent/CN207717941U/en active Active
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