Fault-tolerant instantaneous torque controlled asynchronous motor power generation system and control method thereof

Abstract

The invention provides a fault-tolerant instantaneous torque controlled asynchronous motor power generation system and a control method thereof. The fault-tolerant instantaneous torque controlled asynchronous motor power generation system comprises a main circuit, an initial excitation circuit, a detection circuit and a control circuit, wherein the main circuit comprises an asynchronous motor, a fault-tolerant converter, a first bus capacitor and a second bus capacitor; the fault-tolerant converter is composed of a three-phase bridge arm and a bidirectional thyristor; after the asynchronous motor power generation system is subjected to fault tolerance, a three-phase six-switch converter is turned into a two-phase four-switch converter; as long as a new optimal voltage vector selection table is redesigned according to the characteristics of the voltage vector of the two-phase four-switch converter, quick control of the instantaneous torque of the asynchronous motor power generation system can be continuously achieved, so that the asynchronous motor power generation system after being subjected to the fault tolerance keeps the advantages that the control algorithm is simple, the effect of motor parameters is less and the dynamic property is good. The fault-tolerant instantaneous torque controlled asynchronous motor power generation system is reasonable in design and simple in circuit structure, the cost increase is limited, and the working reliability of the asynchronous motor power generation system is greatly improved.

Description

technical field [0001] The invention relates to a fault-tolerant instantaneous torque control asynchronous motor power generation system and a control method thereof, which are suitable for occasions requiring high power generation reliability and belong to the technical field of motor control. Background technique [0002] The new asynchronous motor power generation system composed of a combination of power electronic converter and asynchronous motor adopts advanced control technology, and its performance is greatly improved compared with traditional asynchronous generators. Therefore, it has become a new type of airborne and vehicle-mounted equipment for aircraft, automobiles, tanks, etc. Ideal for standalone power systems. [0003] As a power supply system used in aviation and military affairs, reliability is the first issue that must be considered, and fault-tolerant technology is a powerful guarantee to improve reliability. In the new generation system composed of the ...

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Problems solved by technology

[0004] The asynchronous motor power generation system using instantaneous torque control has excellent dynamic performance, and the dynamic recovery time during sudden loading and unloading is less than the 30ms required by the US military standard, which can well meet the requirements of uninterrupted power supply for telex systems and advanced instruments. Therefore, as an independent power supply for aircraft, tanks, warships, ships and other moving carriers, it has great application prospects. The authorized Chinese invention patent: Instantaneous torque-controlled cage-type asynchronous motor power electronic converter DC starter / generation system, Publication No. : CN 1396705A, announced the composition and control method of the asynchronous motor power generation system controlled by instantaneous torque, but this patent only invented the hardware circuit and control method of the normal operation of the asynchronous motor power generation system controlled by instantaneous torque, and did not consider the failure of the system fault tolerance technology

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