Method for identifying permanent magnet flux and quadrature axis inductance of permanent magnet synchronous motor

A permanent magnet synchronous motor and quadrature-axis inductance technology, which is used in the control of generators, motor generators, and electronic commutation motors. methods, etc.

Inactive Publication Date: 2013-10-02
TONGJI UNIV
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Problems solved by technology

The patent does not further provide the identification method of the parameters of the motor body, and its flux linkage is still directly calculated through the voltage-flux linkage equation. The division operation in the calculation process will amplify the identification error caused by the speed and current, and reduce the flux. Chain identification accuracy

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  • Method for identifying permanent magnet flux and quadrature axis inductance of permanent magnet synchronous motor
  • Method for identifying permanent magnet flux and quadrature axis inductance of permanent magnet synchronous motor
  • Method for identifying permanent magnet flux and quadrature axis inductance of permanent magnet synchronous motor

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Embodiment Construction

[0047] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0048] The present invention takes Based on current control method and vector control, a permanent magnet synchronous motor permanent magnet flux ψ f and quadrature axis inductance L q identification method. The identification method can identify the variation curve of the parameter offline or online. It works as figure 1 As shown, it specifically includes the following steps.

[0049] Step 1: Determine whether the motor is in In the steady state operation state under the current control method, if it is already in the steady state operation state, go to step 2;

[0050] Since the magnetic flux ψ can only be carried out when the motor is in a steady state f and quadrature axis inductance L q identification, so in step 1, first confirm whether the motor is in In the steady-state running state under the current control method, the con...

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Abstract

The invention discloses a method for identifying permanent magnet flux and quadrature axis inductance of a permanent magnet synchronous motor. The method comprises the steps as follows: designing a filter based on an identification algorithm and calculating identification parameters. The accuracy of the permanent magnet flux and quadrature axis inductance parameters directly influences the control performance of a vector control system of the permanent magnet synchronous motor. But the existence of a saturation effect and the like enables the motor parameters to be non-linearly changed. Therefore, a change curve of the motor parameters is necessarily measured or identified on line. The invention discloses the simple and easy method for identifying the permanent magnet flux and the quadrature axis inductance, and the control performance of the system is improved on the basadopts not increasing the system cost.

Description

technical field [0001] The invention relates to a parameter identification method of a permanent magnet synchronous motor, in particular to the identification of permanent magnet flux and quadrature axis inductance parameters. Background technique [0002] The permanent magnet synchronous motor is very suitable for applications with limited space due to its simple structure, small size, light weight, small moment of inertia, and high power density. In addition, it has high efficiency, high power factor, large moment of inertia ratio, and strong overload capacity. Especially at low speed, the output torque is large, so it has been widely used. The vector control system can realize the good response of the motor current in the whole speed range, high control efficiency, the design of the regulator is relatively easy to realize, the speed adjustment range is wide, and it has good load starting performance. Therefore, the vector control scheme is the preferred scheme for the pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14
Inventor 朱元吴志红陆科徐雅楠孙义涵俞冬冬刘甜溪王小静罗梦鲍骢鸣周东东洪晓君黄思源
Owner TONGJI UNIV
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