A pole-changing speed-adjusting permanent magnet motor

Abstract

The invention discloses a pole-changing speed-adjusting permanent magnet motor, comprising a rotating shaft, a stator iron core and a rotor iron core which surround the rotating shaft and used for cooperating with each other; the stator iron core is provided with a stator slot; pole-changing winding is installed in the stator slot; in addition, a permanent magnet is arranged inside the rotor ironcore. The variable pole winding is used to provide at least two different pole numbers, in particular at least two independent sets of variable pole winding with different pole logarithms, or a set ofvariable pole winding is transformed by its wiring mode to correspond to at least two different pole numbers. The invention improves the component structure of the whole motor and the cooperation working mode between each component, especially by improving the setting of stator pole-changing winding and the corresponding pole-changing mode, the novel variable pole speed permanent magnet motor isobtained. Compared with the variable pole induction motor, the novel variable pole speed permanent magnet motor improves the efficiency and power factor, and solves a series of problems such as complex structure, high cost and high difficulty in pole-changing process control of the existing pole-changing speed-adjusting permanent magnet motor.

Description

technical field [0001] The invention belongs to the field of motors, and more specifically relates to a pole-changing speed-regulating permanent magnet motor, which is a permanent magnet synchronous motor capable of asynchronous starting and pole-changing speed regulation. Background technique [0002] Today, energy shortage has become an important issue related to human survival, and it is imperative to develop new energy and save energy. Electric energy is currently the most widely used secondary energy by human beings, and it is closely related to the national energy conservation, emission reduction and sustainable development strategies. With the development of the country's economy, industrial electricity consumption has increased year by year, accounting for more than 70% of the country's electricity consumption, and the electricity consumption of motors accounts for more than 50% of the total industrial electricity consumption. Therefore, the energy saving of motors ...

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Problems solved by technology

[0008] In view of the above defects or improvement needs of the prior art, the purpose of the present invention is to provide a pole-changing speed-regulating permanent magnet motor, wherein the overall component composition of the motor and the cooperative working mode between the components are improved, especially by improving the The setting of the stator pole-changing winding and the corresponding pole-changing method have been improved, and the new pole-changing speed-regulating permanent magnet motor obtained has improved efficiency and power factor compared with the pole-changing induction motor, and at the same time solved the problem of existing pole-changing speed regulation. Permanent magnet motors have a series of problems such as complex structure, high cost and high difficulty in controlling the pole changing process

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