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Control modulation method for high-power direct-drive permanent magnet synchronous motor

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: 2019-11-19
CRRC YONGJI ELECTRIC CO LTD
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  • 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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  • Control modulation method for high-power direct-drive permanent magnet synchronous motor
  • Control modulation method for high-power direct-drive permanent magnet synchronous motor
  • Control modulation method for high-power direct-drive permanent magnet synchronous motor

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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 invention belongs to the technical field of electric locomotive traction control and particularly relates to a control modulation method for a high-power direct-drive permanent magnet synchronousmotor. In order to achieve the accurate decoupling of the high-power direct-drive permanent magnet synchronous motor, improve anti-disturbance performance, reduce the dependence of traditional controlon motor parameters, reduce the number of control parameters, and improve the robustness of a whole locomotive system, the present invention provides the control modulation method for the high-powerdirect-drive permanent magnet synchronous motor. The modulation uses a SHEPWM strategy. Compared with a traditional SPWM method, the SHEPWM method can eliminate specific-order harmonics and reduce thedesign difficulty of a filter. In addition, the method uses a comparison value mode in a SHEPWM pulse generation process, can shorten the delay of a switching angle compared with a conventional forced mode, realizes the SHEPWM pulse generation at high precision, effectively eliminates the specific-order harmonics, and reduces the low-order harmonic content of the 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 Applications(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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