A radial double-winding switched reluctance motor for electric vehicles and its power converter

Abstract

The invention discloses a radial double-winding switched reluctance motor for an electric vehicle and a power converter thereof. Each outer block stator consists of an outer stator trapezoidal inlay area, an outer stator yoke and an outer Composed of excitation teeth, each outer excitation tooth is wound with an outer winding, and the rotor ring is composed of N r A trapezoidal segmented rotor and non-magnetically conductive trapezoidal blocks are alternately distributed along the circumferential direction, and each inner segmented stator is composed of an inner stator trapezoidal inlay area, an inner stator yoke and an inner excitation tooth that are sequentially connected from the inside to the outside; Taking phase A as an example, the negative terminal of the phase winding A1 in the inner winding is connected to the positive terminal of the phase winding A2 in the outer winding and the positive pole of the diode D1 at the same time, and the negative terminal of the phase winding A2 is connected to the source of the power switch tube V2 , the phase windings A2, B2, and C2 in the outer winding are connected in parallel with an added power switch tube, which can realize fast demagnetization, improve output torque, power density and efficiency, and broaden the driving mode and speed regulation range of the motor.

Description

technical field [0001] The invention relates to the technical field of motor manufacturing and application, in particular to a switched reluctance motor structure and a matching power converter capable of improving its power density and efficiency. Background technique [0002] The switched reluctance motor is a DC motor that realizes the rotation of the motor by switching the on-phase in turn. Because of its simple structure, it does not require permanent magnets containing rare earth materials, and has good robustness, large starting torque, small starting current and high efficiency. , good speed regulation performance, suitable for frequent start and stop occasions and many other advantages, it has been widely concerned in electric vehicles. However, traditional switched reluctance motors have lower power density and efficiency compared with permanent magnet motors because they have no permanent magnets and produce negative torque during demagnetization. These shortcomin...

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Problems solved by technology

But in fact, the above-mentioned two published patent technologies only increase the complexity of the structure or winding to increase the torque and speed regulation range. In essence, they can be regarded as two motors, which can move independently or in parallel, so Both do not improve the power density and efficiency of the motor

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