Thyristor-based magnetic field modulation switched reluctance motor driving system and control method

Abstract

The invention discloses a thyristor-based magnetic field modulation switched reluctance motor driving system, which belongs to the technical field of motors and comprises a direct-current power supply, a plurality of single-phase inversion units and a direct-current injection bridge arm, wherein each single-phase inversion unit comprises an upper thyristor, a lower thyristor, an intermediate switch tube and anti-parallel diodes thereof, and the upper thyristor, the lower thyristor, the intermediate switch tube and the anti-parallel diodes form an inversion circuit; the output port of each single-phase inversion unit is connected with one end of each phase winding of the switched reluctance motor, and sinusoidal current with direct current bias is injected into each phase winding of the switched reluctance motor; and the direct current injection bridge arm is connected with a motor winding neutral point and provides a circulation path for a direct current bias component of the sinusoidal current. By introducing the low-cost thyristor and the equivalent SVPWM modulation method, the number of IGBTs is reduced while the inversion function is achieved, and the system cost and the size are effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of motors, and more specifically relates to a thyristor-based magnetic field modulation switched reluctance motor drive system and 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, the importance of motors as the core of electromechanical energy conversion systems has become increasingly apparent. According to statistics, the electrical energy consumed by the motor accounts for about 60% of the total electricity consumption. The new topology of motor drive has also received extensive attention and research. With the development of modern electronic technology, switched reluctance motors are considered to have broad development prospects. Its structure is simple, there is no need for wound ...

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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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