Radial double-winding switched reluctance motor for electric automobile and power converter thereof

Abstract

The invention discloses a radial double-winding switched reluctance motor for an electric automobile and a power converter thereof. Each outer block stator is composed of an outer stator trapezoidal embedded area, an outer stator yoke part and outer excitation teeth which are connected in sequence from outside to inside, and an outer winding is wound on each outer excitation tooth; and the rotor ring is formed by alternately distributing Nr trapezoidal block rotors and non-magnetic trapezoidal blocks in the circumferential direction, and each inner block stator is composed of an inner stator trapezoidal embedded area, an inner stator yoke part and inner excitation teeth which are sequentially connected from inside to outside. The A phase is taken as an example, the negative end of the phase winding A1 in the inner winding is simultaneously connected with the positive end of the phase winding A2 in the outer winding and the positive electrode of the diode D1, the negative end of the phase winding A2 is connected with the source electrode of the power switch tube V2, and the phase windings A2, B2 and C2 in the outer winding are connected in parallel with an added power switch tube, thereby realizing rapid demagnetization, and improving output torque, power density and efficiency. The driving mode and the speed regulation range of the motor are expanded.

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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