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Parameter calibration method and system for permanent-magnet synchronous motor

A technology of permanent magnet synchronous motor and calibration method, which is applied in the direction of control system, control generator, motor control, etc. It can solve the problems that permanent magnet synchronous motor control cannot be controlled normally, errors are difficult to be detected, etc., and achieve high accuracy , Strong practicability and simple operation

Active Publication Date: 2019-10-11
SHENZHEN HPMONT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, once the above nameplate values ​​are wrong, the control of the permanent magnet synchronous motor will not be able to control normally, and these errors are difficult to detect, so it is necessary to invent a method for the number of pole pairs of the permanent magnet synchronous motor and the number of encoder lines check

Method used

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  • Parameter calibration method and system for permanent-magnet synchronous motor
  • Parameter calibration method and system for permanent-magnet synchronous motor
  • Parameter calibration method and system for permanent-magnet synchronous motor

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Please refer to figure 2 , is a schematic flow chart of a method for verifying pole logarithm parameters of a permanent magnet synchronous motor in an embodiment, and the method includes:

[0051] Step 110, obtaining the predicted value NP of the pole logarithm.

[0052] Obtain the estimated value NP of the number of pole pairs of the permanent magnet synchronous motor. The estimated value NP of the number of pole pairs of the permanent magnet synchronous motor can be directly obtained from the value on the motor nameplate or the manual of the motor. The relevant parameters of the permanent magnet synchronous motor need to be checked before leaving the factory. When the nameplate of the magnetic synchronous motor is worn out during long-term use, and the installation location is inconvenient to view its related parameters or perform routine inspections, it is necessary to verify this parameter. In one embodiment, the estimated value NP of the number of pole pairs of ...

Embodiment 2

[0077] This application also discloses a method for verifying the number of encoder lines of a permanent magnet synchronous motor, please refer to Figure 4 , is a schematic flow chart of a method for verifying the number of encoder lines parameters of a permanent magnet synchronous motor in another embodiment, the method comprising:

[0078] Step 210, obtain estimated values ​​NP and #En.

[0079]Obtain the estimated value NP of the number of pole pairs of the permanent magnet synchronous motor and the estimated value #En of the number of encoder lines. The estimated value NP of the number of pole pairs of the permanent magnet synchronous motor and the estimated value #En of the number of encoder lines can be directly obtained from the value on the motor nameplate or the manual of the motor. The relevant parameters of the permanent magnet synchronous motor must be checked before leaving the factory. However, in practical applications, when the nameplate of the permanent magn...

Embodiment 3

[0101] Please refer to Figure 5 , is a schematic structural diagram of a parameter verification system for a permanent magnet synchronous motor in another embodiment, the system includes a parameter acquisition device 10 , a power supply module 20 and a controller 30 . The parameter obtaining device 10 is used to obtain an estimated value NP of the number of pole pairs of the permanent magnet synchronous motor. The power supply module 20 is used for synthesizing the voltage vector and converting it into a three-phase output voltage to supply power for the permanent magnet synchronous motor. The controller 30 is used to position the rotor of the permanent magnet synchronous motor to obtain the initial position of the rotor, and control the rotor to perform NP times of directional equiangular rotation operations, and then position the rotor to obtain the end position of the rotor, and then according to The initial position of the rotor and the end position of the rotor are use...

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Abstract

A parameter calibration method and system for a permanent-magnet synchronous motor relates to the technical field of parameter verification of the permanent-magnet synchronous motor. Directional equal-angle rotation operation is performed on a rotor for NP times by a mode of giving a group of preset vector angle voltages to the permanent-magnet synchronous motor according to an estimation value NPof pole pair number of the permanent-magnet synchronous motor and a rotor initial position so that a rotor ending position is obtained, and a relation between the estimation value NP of the pole pairnumber and an actual value is judged according to the rotor initial position and the ending position. After directional equal-angle rotation operation is performed on the rotor for NP times, the rotor is rotated by 360 degrees if the estimation value of the pole pair number is same as the actual value, so that the initial position and the ending position are overlapped, and the relation between the estimation value NP of the pole pair number and the actual value can be judged. The method is simple to operate and is high in practicability and high in accuracy.

Description

technical field [0001] The invention relates to the technical field of parameter verification of permanent magnet synchronous motors, in particular to a parameter verification method and system for permanent magnet synchronous motors. Background technique [0002] Permanent magnet synchronous motor (permanent mag-net synchronous motor, PMSM) is mainly composed of various components such as rotor, end cover and stator. The stator structure of the permanent magnet synchronous motor is very similar to that of the ordinary induction motor. The biggest difference between the rotor structure and the asynchronous motor is that high-quality permanent magnet poles are placed on the rotor. Since the magnetic field of the permanent magnet synchronous motor is generated by the permanent magnet, the excitation loss caused by the magnetic field generated by the excitation current is avoided. The starting and running of the permanent magnet synchronous motor is formed by the interaction o...

Claims

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Application Information

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IPC IPC(8): H02P21/18H02P21/14H02P25/022
CPCH02P21/14H02P25/022H02P2203/03H02P2207/05H02P21/18
Inventor 田清和郑伟
Owner SHENZHEN HPMONT TECH