Synchronous magnetoelectric machine and starting and running method thereof

Abstract

The invention relates to a synchronous magnetoelectric machine and a starting and running method thereof. The synchronous magnetoelectric machine comprises a common alternating current machine and a permanent-magnet machine, wherein, the common alternating current machine is connected on a motor shaft of the permanent-magnet machine in series; the common alternating current machine is started at the moment the permanent-magnet machine is started, a high pulling torque is provided for the motor shaft at the moment the common alternating current machine is started, and the motor shaft is caused to generate jiggling effect from stillness to running; at this time, the common alternating current machine stops, while the permanent-magnet machine starts to run under the jiggling effect; after being started, the motor enters a running state, the common alternating current machine is taken as an electric generator at the moment and generates electricity by being driven by the permanent-magnet machine. The invention has the beneficial effects that starting current of the permanent-magnet machine can be greatly reduced, thus the requirements for transformer on starting the motor are reduced, and the installing and using costs of the equipment are lowered; after the motor is started, the common alternating current machine can be driven to generate electricity, thereby playing the role of saving energy.

Description

technical field [0001] The invention relates to a permanent magnet motor and its start-up and operation methods. Background technique [0002] At present, the commonly used high-power permanent magnet motors, especially the synchronous permanent magnet motors, require a large current excitation at the moment of starting, and correspondingly need to be equipped with a relatively high-power transformer. Ordinary transformers cannot start this type of permanent magnet at all. motor. The cost of the transformer also increases exponentially with the increase of the power of the transformer, so it brings problems to the promotion of high-power permanent magnet motors. In view of the above problems, if a high-power permanent magnet motor can be designed, it can be started as long as it is excited by a relatively small current, then it can be realized only by using an ordinary transformer, which can greatly reduce the cost of the transformer and give the motor The promotion and ap...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a synchronous permanent magnet motor, which can achieve the effect of starting the motor by using a smaller current, and solve the problems of excessive starting current of the commonly used permanent magnet motor and high cost of related transformer equipment

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