A fault-tolerant control method for a dual-motor synchronous control system

A synchronous control and fault-tolerant control technology, which is applied in control systems, motor control, vector control systems, etc., can solve problems such as inverter bridge arm failures, industrial losses, major accidents, etc., to achieve angle and speed, and improve reliability performance, to achieve the effect of fault-tolerant control

Active Publication Date: 2022-02-11
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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  • A fault-tolerant control method for a dual-motor synchronous control system
  • A fault-tolerant control method for a dual-motor synchronous control system
  • A fault-tolerant control method for a dual-motor synchronous control system

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[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. The feedback speed and rotor position are input to a synchronous control unit, and the three-phase currents of the dual motors are respectively transformed by Park and Clark to obtain respective feedback AC-D axis currents. The corresponding torque is input to the synchronous control unit for comparison, and the corresponding angle and speed compensation strategy is determined; the quadrature axis reference current and the direct axis reference current are compared with the feedback AC and direct axis currents of the dual motors, and the respective arc and direct axis reference voltages are calculated ; The AC-D axis reference voltage of the dual motors is inversely transformed by Park to obtain two voltage components in the stationary coordinate system, and three duty ratio signals are obtained respectively; by detecting the three-phase current of the dual motors to judge the faulty bridge arm of the inverter, The fault signal is sent to the fault-tolerant inverter and the PWM signal logic synthesis unit to complete the reconstruction of the fault-tolerant topology and the realization of the fault-tolerant algorithm, and finally realize the fault-tolerant control of the double permanent magnet synchronous motor. 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 Patents(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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