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Fault-tolerant control method of dual-motor synchronous control system

A technology of synchronous control and fault-tolerant control, which is applied in the direction of control system, motor control, vector control system, etc., and can solve problems such as synchronous influence of synchronous system, major accidents, industrial losses, etc.

Active Publication Date: 2020-05-29
CHECC DATA CO LTD +1
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Problems solved by technology

The traditional dual permanent magnet synchronous motor control uses a six-leg inverter. Due to the complexity and fragility of the power electronic switch structure, the inverter bridge arm often fails, which will cause industrial losses and seriously damage the cause a major accident, the synchronization of the synchronization system will also affect

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  • Fault-tolerant control method of dual-motor synchronous control system
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Embodiment Construction

[0044] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

[0045] see figure 1 , the present invention provides a fault-tolerant control method for a dual-motor synchronous control system, the fault-tolerant inverter topology includes a DC power supply u dc and two three-phase six-switch inverters.

[0046] Inverter 1 includes bridge arm L 1 , L 2 , L 3 , bridge arm L 1 including powe...

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Abstract

The invention discloses a fault-tolerant control method of a dual-motor synchronous control system. A feedback rotating speed and a rotor position are input into a synchronous control unit, three-phase currents of double motors are converted through Park and Clark to obtain respective feedback quadrature-direct axis currents, corresponding torques are input into the synchronous control unit to becompared, and a corresponding angle and speed compensation strategies are determined; a quadrature-axis reference current and a direct-axis reference current are compared with the feedback quadrature-direct axis current of the double motors, and respective quadrature-direct axis reference voltages are calculated; Park inverse transformation is performed on the quadrature-direct axis reference voltage of the double motors to obtain two voltage components under a static coordinate system, and three duty ratio signals are obtained; and a fault bridge arm of the inverter is judged by detecting a three-phase current of the double motors, fault signals are sent to a fault-tolerant inverter and a PWM signal logic synthesis unit to complete reconstruction of a fault-tolerant topology and implementation of a fault-tolerant algorithm, and finally fault-tolerant control of the double permanent magnet synchronous motors is achieved. System reliability is high.

Description

technical field [0001] The invention belongs to the technical field of motor systems and controls, and in particular relates to a fault-tolerant control method of a dual-motor synchronous control system. Background technique [0002] The permanent magnet synchronous motor has the advantages of less loss, high efficiency and obvious power saving effect, and has been widely used in recent years. Scholars at home and abroad have done a lot of research on the synchronous control of double permanent magnet synchronous motors. The traditional double permanent magnet synchronous motor control uses a six-leg inverter. Due to the complexity and fragility of the power electronic switch structure, the inverter bridge arm often fails, which will cause industrial losses and seriously damage the Cause a major accident, the synchronization of the synchronization system will also have an impact. Contents of the invention [0003] The technical problem to be solved by the present inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/04H02P21/18H02P29/028
CPCH02P6/04H02P21/18H02P29/028
Inventor 林海夏登凯闫茂德朱旭杨盼盼左磊
Owner CHECC DATA CO LTD
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