A thyristor-based magnetic field modulation switched reluctance motor drive system and control method

Abstract

The invention discloses a thyristor-based magnetic field modulation switched reluctance motor drive system, which belongs to the technical field of motors and includes: a DC power supply, a plurality of single-phase inverter units and a DC injection bridge arm; each single-phase inverter unit includes a The upper thyristor, the lower thyristor, the middle switch tube and their respective anti-parallel diodes of the inverter circuit; the output ports of each single-phase inverter unit are respectively connected to one end of each phase winding of the switched reluctance motor, which is the switching reluctance motor. The phase winding injects a sinusoidal current with a DC bias; the DC injection bridge arm is connected to the neutral point of the motor winding to provide a flow path for the DC bias component of the sinusoidal current. By introducing low-cost thyristors and an equivalent SVPWM modulation method, the invention reduces the number of IGBTs while realizing the inverter function, and effectively reduces the system cost and volume.

Description

technical field [0001] The invention belongs to the technical field of motors, and more particularly, relates to a thyristor-based magnetic field modulation switched reluctance motor drive system and a control method. Background technique [0002] With the advancement of science and technology and the development of society, electrification has developed rapidly. With the emergence of emerging industries such as electric vehicles, rail transit, and industrial robots, motors, as the core of electromechanical energy conversion systems, are increasingly important. According to statistics, the electric energy consumed by the motor accounts for about 60% of the total electricity consumption. New topologies for motor drives have also received extensive attention and research. With the development of modern electronic technology, switched reluctance motors are considered to have broad development prospects. The structure is simple, no windings are wound on the rotor and no perma...

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a thyristor-based magnetic field modulation switched reluctance motor drive system and its control method, the purpose of which is to solve the traditional motor drive topology that requires a large number of IGBT switch tubes to achieve The function of injecting DC bias sinusoidal current, causing technical problems of high system cost and large volume

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