A three-phase switched reluctance motor integrated boost power converter and its control method

Abstract

The invention relates to a three-phase switched reluctance motor integrated boost power converter and a control method, which are aimed at the lower freewheeling diodes of the middle and A-phase bridge arms of the three-phase asymmetrical half bridge of the three-phase switched reluctance motor. The second IGBT transistor S 2 Instead, connect the DC power supply and the inductance series branch in parallel at both ends of the switch tube, so that the first IGBT transistor S on the A-phase bridge arm 1 with the third IGBT transistor S 3 A step-up DC-DC converter power circuit is formed, so that the new A-phase bridge arm realizes the integration of the step-up DC-DC converter and the asymmetrical half-bridge arm without adding power devices. The whole scheme uses The switched reluctance motor power converter can realize the integration of topology and control in the one-phase bridge arm of the three-phase asymmetrical half-bridge power circuit by the step-up DC-DC converter without adding switching devices, so that the other two The excitation and demagnetization voltages of the phase windings have the ability to boost and adjust.

Description

technical field [0001] The invention relates to a three-phase switched reluctance motor integrated boost power converter and a control method, belonging to the technical field of motor drive control. Background technique [0002] The switched reluctance motor is a doubly salient pole structure, which has the characteristics of large starting torque, convenient control, low cost, good fault tolerance and high efficiency. It is beneficial to the miniaturization and integration of the switched reluctance motor system. [0003] The typical power topology of switched reluctance motor is an asymmetrical half-bridge. Each bridge arm needs two freewheeling diodes and two switching tubes. If it is necessary to boost the bus voltage, it needs to The cascaded DC-DC converter constitutes a two-stage structure. This solution adds two additional switching tubes, and the number of power devices is increased. At the same time, the front, rear and control are separated from each other, and ...

AI Technical Summary

Problems solved by technology

[0003] The typical power topology of switched reluctance motor is an asymmetrical half-bridge. Each bridge arm needs two freewheeling diodes and two switching tubes. If it is necessary to boost the bus voltage, it needs to The cascaded DC-DC converter constitutes a two-stage structure. This solution adds two additional switching tubes, and the number of power devices is increased. At the same time, the front, rear and control are separated from each other, and the demand for driving resources is large.

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