Mixing torque motor and traction machine adopting same

Abstract

The invention discloses a mixing torque motor which includes stators and rotors positioned on the peripheries of the stators, wherein the rotors include barrel-shaped rotor iron cores; a plurality of permanent magnets are distributed on the inner walls of the rotor iron cores at intervals; the polarities of two adjacent permanent magnets are opposite, and permeability magnetic materials are arranged between the two adjacent permanent magnets. The invention further discloses a traction machine adopting the mixing torque motor. Compared with a conventional gearless permanent magnet synchronous traction machine, the traction machine provided by the invention reduces magnetic steel using amount and lowers the motor cost, so that the complete machine cost of the traction machine is reduced and the structure is compact and the size is small; operational maximum speed of the traction machine is further improved through flux weakening speed expansion due to structural salient poles added on the rotors; the degree of difficulty of detecting positions of rotor magnetic poles through adopting the position sensor free control algorithm is reduced and greater possibility of de-encoding of the permanent magnet traction machine is provided due to the existence of the structural salient poles.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a hybrid torque motor and the traction machine using the hybrid torque motor. Background technique [0002] At present, elevator traction machines are mainly three-phase asynchronous motors or permanent magnet synchronous motors. The three-phase asynchronous motor has large volume, high noise, low working efficiency, and is equipped with a deceleration device with a complex structure, which makes the structure of the entire traction machine complex and the overall cost increases. The permanent magnet synchronous traction machine does not need a deceleration device, and has high efficiency and low noise. It gradually replaces the three-phase asynchronous motor, but the rare earth material is expensive, which limits the development of the permanent magnet synchronous motor. [0003] In the prior art, a switched reluctance motor has been developed, which uses the princip...

AI Technical Summary

Problems solved by technology

The three-phase asynchronous motor has large volume, high noise, low working efficiency, and is equipped with a deceleration device with a complex structure, which makes the structure of the entire traction machine complex and the overall cost increases

The motor does not use permanent magnets, and the cost is low, but the torque ripple is large, and the running noise and vibration are relatively large

[0004] Another hybrid torque motor is disclosed in the prior art, which can utilize permanent magnet torque and reluctance torque at the same time. For example, the patent document with the patent application number CN201210472407.5 discloses a permanent magnet reluctance type in-wheel motor , the disclosed rotor structure is equipped with magnets of the same polarity, with arc-shaped salient poles and magnetically conductive convex bodies at intervals, claiming that the amount of magnets can be reduced, but this structure only uses magnets of one polarity. The potential distortion is large, the torque ripple is large, and the position sensor is not

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