Duplex permanent magnetic synchronous electric machine

Abstract

The invention relates to a duplex permanent-magnet synchronous motor which comprises two motors: an outer rotor of a motor A is directly connected with the shaft of an engine; the shaft of an inner rotor is an output shaft; one of the outer rotor and the inner rotor is provided with a permanent-magnet pole, and the other is a winding that is wound on an iron core; a motor B comprises a stator and a rotor; the stator is fixed at a shell; one of the stator and the rotor is embedded with a permanent-magnet pole and the other is a winding that is wound on the iron core; the rotor shares a same shaft with the inner rotor. The outer rotor of the motor A rotates with the engine synchronously; the winding of the motor A receives current phasor and imposes load torque onto the engine. The inner rotor of the motor A does work directly to the outside world, and passes through the power of the engine to a load side. Both the motor A and the motor B can operate in four quadrants; each assembly servo drive device loads different torques onto the motor A and the motor B according to the operation requirements; the duplex motor of the invention can operate by a novel power transmission method of power passing through, electric power generation and energy storage, doing work with electricity and braking and feeding back electrical energy; the engine is adjusted to work at the best efficiency point.

Description

(1) Technical field [0001] The invention relates to a permanent magnet synchronous motor, in particular to a double-connected permanent magnet synchronous motor. (2) Background technology [0002] Due to the shortage of energy sources and rising oil prices, the high fuel consumption and pollution of pure fuel engines have become the focus of attention. The reasons are related to the inconvenience of adjusting the operating point and low efficiency of the engines. All countries have accelerated the research on electric vehicles. [0003] Years of research have found that there are many problems in pure electric vehicles, mainly because the performance of current batteries cannot meet the requirements of driving vehicles. Compared with gasoline, the energy-product ratio of batteries is very different. The energy of a fully charged battery weighing one ton is not as large as the energy output by the engine burning 30 kilograms of gasoline. Therefore, the battery life of pure el...

AI Technical Summary

Problems solved by technology

Although different degrees of energy saving have been achieved, the existing power structures have certain limitations, which directly affect the vehicle manufacturing cost and energy saving effect

The power structure of the current gasoline-electric hybrid vehicle is difficult to meet the requirements for further improvement of performance and practicality

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