Inverter topological structure used for dual motors

Abstract

The invention provides an inverter topological structure used for dual motors. The inverter topological structure comprises a positive bus, a negative bus, a first capacitor, a second capacitor, a first switching tube bridge arm, a second switching tube bridge arm, a third switching tube bridge arm, a fourth switching tube bridge arm and a fifth switching tube bridge arm, wherein the first capacitor and the second capacitor are connected in series between the positive bus and the negative bus; a first motor of the dual motors is connected with the first capacitor, the second capacitor, the first switching tube bridge arm and the second switching tube bridge arm separately to form control connection between the first motor and a three-phase four-switch inverter; and the second motor of the dual motors is connected with the third switching tube bridge arm, the fourth switching tube bridge arm and the fifth switching tube bridge arm separately to form control connection between the second motor and a three-phase voltage type full-bridge inverter. The inverter topological structure used for the dual motors provided by the invention can realize actual independent control; and the control is simpler and the control effect is better.

Description

technical field [0001] The present invention relates to the technical field of motor control, in particular to an inverter topology for dual motors. Background technique [0002] In recent years, in many industrial applications, such as oil exploration, electric / hybrid vehicles, aerospace, etc., it is often necessary to control multiple motors with high performance, and the inverter topology of a single motor cannot meet the actual requirements. demand, the inverter topology and control strategy of dual motors have become a research hotspot in recent years. Considering the cost and control effect, the two motors share several switching tubes or capacitors at present, and then the common SPWM or SVPWM Corresponding improvements. [0003] After searching found: [0004] Shi Tingna, Zhang Bijun, Liu Tao, etc. published in "Chinese Journal of Electrical Engineering" (2015,35(6):1498-1507) "Dual permanent magnet synchronous motor system driven by a five-leg inverter. Optimal mo...

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Problems solved by technology

[0010] The present invention aims at the traditional dual-motor inverter topology existing in the prior art, and the two motors usually share a common switching tube or capacitor, which makes the control complex and difficult to realize independent control, etc., and proposes a dual-motor inverter Inverter topology, this topology truly realizes that the two motors do not share a switch tube or capacitor, truly achieves independent control of the two motors, and greatly reduces the difficulty of control

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