Switched reluctance type gearless tractor

Abstract

The invention provides a switched reluctance type gearless tractor, which comprises an electric motor, a traction wheel, a sensor and at least two brakes, wherein the electric motor is a switched reluctance motor; the switched reluctance motor comprises an engine base, a rotor and a stator; the switched reluctance motor drives the traction wheel to rotate to provide a traction driving force for the running of an elevator; the rotor and the stator are installed on the engine base; the sensor is installed inside the engine base; a controller controls on-off of each phase winding of the stator according to a certain rule and position information of the rotor detected by the sensor to produce the electromagnetic torque to drive the rotor to rotate, so as to produce the driving force; and the brakes are installed on two sides of the engine base. The tractor of the invention adopts the switched reluctance motor to drive the traction wheel to rotate, and the rotor is formed by the overlapping of a rotating shaft and a salient pole silicon steel sheet. In comparison with the prior art, the tractor of the invention greatly simplifies the structure of the tractor, greatly reduces the cost of a complete machine, and is compact in structure and small in volume.

Description

technical field [0001] The invention belongs to the technical field of elevator drive, in particular to a switched reluctance type gearless traction machine. Background technique [0002] Traditional elevator traction machines generally use three-phase asynchronous motors, which are large in size, loud in noise and low in efficiency; in addition, they must be equipped with complex structure reduction gears to work together, making the structure of the entire traction machine complex and the cost of the whole machine Improvement, high failure rate, and relatively high maintenance costs. In recent years, the permanent magnet synchronous traction machine has developed rapidly, and there is a tendency to replace the traditional traction machine using three-phase asynchronous motors. However, with the rapid increase in the price of rare earth materials, the cost of the entire traction machine has doubled, and the high cost has greatly limited The development of permanent magnet ...

AI Technical Summary

Problems solved by technology

[0002] Traditional elevator traction machines generally use three-phase asynchronous motors, which are large in size, loud in noise and low in efficiency; in addition, they must be equipped with complex structure reduction gears to work together, making the structure of the entire traction machine complex and the cost of the whole machine Improvement, high failure rate, and relatively high maintenance costs

In recent years, the permanent magnet synchronous traction machine has developed rapidly, and there is a tendency to replace the traditional traction machine using three-phase asynchronous motors. However, with the rapid increase in the price of rare earth materials, the cost of the entire traction machine has doubled, and the high cost has greatly limited The development of permanent magnet synchronous traction machine; and the permanent magnet is easy to demagnetize at high temperature, if the design is not proper, the reliability of the permanent magnet synchronous traction machine will be greatly reduced

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