Self-adaption reverse-pushing controlling permanent magnet synchronous motor direct torque control (DTC) system and control method thereof

Abstract

A self-adaption reverse-pushing controlling permanent magnet synchronous motor direct torque control (DTC) system comprises an inverter which is connected with a signal detecting circuit and a permanent magnet synchronous motor, the permanent magnet synchronous motor is connected with the signal detecting circuit and a processor, and the signal detecting circuit is connected with the processor which is connected with the inverter. The inverter outputs three-phase alternating current to the permanent magnet synchronous motor, current signals of the permanent magnet synchronous motor are output to the signal detecting circuit, rotating speed pulse signals of the permanent magnet synchronous motor are output to the processor, the current signals of the signal detecting circuit are output to the processor, and the processor outputs switch signals to the inverter. A control method of the self-adaption reverse-pushing controlling permanent magnet synchronous motor DTC system utilizes the self-adaption reverse-pushing control theory, a speed reverse-pushing controller and a flux linkage torque self-adaption reverse-pushing controller are utilized for being used for producing components of voltage on a rest frame, a space vector modulation method is combined to produce appropriate inverter switch signals, and a permanent magnet synchronous motor is further controlled.

Description

Technical field [0001] The invention belongs to the technical field of AC motor transmission, and specifically relates to a permanent magnet synchronous motor DTC system with adaptive reverse thrust control, and also relates to a control method of this system. Background technique [0002] Direct torque control (DTC) technology is a high-performance AC motor speed control strategy developed after vector control technology. At present, this control method has also been applied to permanent magnet synchronous motors (PMSM). Compared with vector control, direct torque control has the advantages of simple control mode, rapid torque response, independent of motor parameters except stator resistance, and easy realization of full digitalization. However, in direct torque control, due to the use of flux hysteresis controller and torque hysteresis controller, at the same time, only the voltage vector is selected among the six basic voltage vectors for control, so there are large torque an...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a permanent magnet synchronous motor DTC system with self-adaptive reverse thrust control, which solves the problems of motor parameter disturbance, load change sensitivity and poor robustness in the prior art

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