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A high-power direct-drive permanent magnet synchronous motor control modulation method

A technology of permanent magnet synchronous motor and modulation method, which is applied in the direction of motor control, motor generator control, AC motor control, etc., and can solve the problem that the control system cannot be satisfied.

Active Publication Date: 2021-01-01
CRRC YONGJI ELECTRIC CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Moreover, in high-power electric locomotives, the IGBT is limited by the heat dissipation conditions of the traction converter, and the maximum switching frequency is limited to 450Hz. The asynchronous modulation method cannot meet the requirements of the control system, and a segmented modulation method is required.

Method used

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  • A high-power direct-drive permanent magnet synchronous motor control modulation method
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  • A high-power direct-drive permanent magnet synchronous motor control modulation method

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Embodiment Construction

[0043] Direct drive permanent magnet traction electric drive system

[0044] Such as figure 1 As shown, the main circuit topology of the direct-drive permanent magnet traction electric drive system adopts the AC-DC connection mode. The input end of the traction converter is connected with the secondary traction winding of the main transformer, and is opened / closed through a contactor. The outputs of two four-quadrant rectifiers are connected in parallel and share the intermediate DC circuit. The intermediate DC circuit is equipped with supporting capacitors, secondary filter capacitors (the secondary filter inductors are integrated in the traction transformer), ground detection and protection devices, etc. The shared intermediate DC circuit supplies power to three traction inverters and one auxiliary inverter. The traction inverter provides three-phase variable frequency and variable voltage AC power to the high-power direct-drive permanent magnet synchronous motor, and one ...

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Abstract

The present invention relates to the technical field of electric locomotive traction control, and specifically to a control modulation method for a high power direct drive permanent magnet synchronous motor. In order to realize accurate decoupling of a high power direct drive permanent magnet synchronous motor, improve the anti-disturbance performance, reduce dependence of the conventional control on motor parameters, reduce the number of control parameters, and improve the robustness of the entire vehicle system, the present invention provides a control modulation method for a high power direct drive permanent magnet synchronous motor. An SHEPWM policy is used for modulation. Compared with the conventional SPWM modulation method, the SHEPWM modulation method can eliminate the specific subharmonic, and reduce the design difficulty of a filter. In addition, during the generation process of an SHEPWM pulse in the present invention, compared with the conventional mandatory method, the use of a comparison value method can effectively reduce the action delay of a switching angle, achieve the SHEPWM pulse generation at higher precision, effectively eliminate the specific subharmonic, and reduce the content of the low subharmonic of a current.

Description

technical field [0001] The invention belongs to the technical field of electric locomotive traction control, and in particular relates to a control modulation method of a high-power direct-drive permanent magnet synchronous motor. Background technique [0002] In recent years, energy conservation and emission reduction, green and low carbon have become the development direction of various fields. The traction motors on electric locomotives in the field of rail transit generally use AC asynchronous motors. With the advancement of control technology and the improvement of design capabilities of permanent magnet synchronous motors in recent years, permanent magnet synchronous motors are often used to replace them due to their advantages in high efficiency and energy saving. Asynchronous motors in existing drive trains. In order to improve the efficiency of the transmission system of the electric locomotive to a greater extent, the present invention makes full use of the advant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00H02P25/022H02P29/50
CPCH02P21/0003H02P25/022H02P2207/05H02P29/50
Inventor 张瑞峰于森林王晓妮苏鹏程詹哲军司军民张吉斌
Owner CRRC YONGJI ELECTRIC CO LTD
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