Coaxial opposite rotor differential motor and new energy automobile

Abstract

A coaxial opposite rotor differential motor belongs to the electromechanical technology and automobile technology field, and comprises a motor housing, a stator, and a first rotor and a second rotor which are coaxially assembled and opposed to each other. The stator, the first rotor and the second rotor are all stator and rotor structures of an asynchronous motor. Electrical parameters of the first rotor and the second rotor are the same. The stator comprises a stator magnetic core and a stator winding, the sum of effective magnetic core lengths of the first rotor and the second rotor is equalto the length of the stator magnetic core, and a magnetic field generated by the stator winding is shared by the first rotor and the second rotor; the first rotor is provided with a first output shaft, the second rotor is provided with a second output shaft, flexible and free operation is allowed between the first rotor and the second rotor, and the two rotors are axially clamped by the two end covers; when the stator winding is connected with an alternating current power supply, the three-phase rotating magnetic field in the vertical direction of the coil is axially segmented according to the electromagnetic principle, so that the first output shaft and the second output shaft face different resistance moments to achieve the differential effect.

Description

technical field [0001] The invention belongs to the field of electromechanical technology and automobile control technology, and in particular relates to a coaxial-opposite-rotor differential motor and a new energy vehicle. Background technique [0002] Existing cars all use differentials to achieve differential drive between wheel speeds. New energy electric vehicles are also equipped with the same mechanical differentials. Such a structure leads to insertion loss of differentials, reduces mechanical transmission efficiency, and exists Noise, the weight of the differential is not conducive to lightweight, increase the vehicle structure cost and operating cost, and there are problems such as maintenance period. For cars using in-wheel motors, no differential drive can be achieved, but the structure of the in-wheel motor and its control system is complex, the cost is high, the weight ratio of the body and the wheel system is also changed, the software of the inter-wheel contr...

AI Technical Summary

Problems solved by technology

[0002] Existing cars all use differentials to achieve differential drive between wheel speeds. New energy electric vehicles are also equipped with the same mechanical differentials. Such a structure leads to insertion loss of differentials, reduces mechanical transmission efficiency, and exists Noise, the weight of the differential is not conducive to lightweight, increase the vehicle structure cost and operating cost, and there are problems such as maintenance period

For cars using in-wheel motors, no differential drive can be achieved, but the structure of the in-wheel motor and its control system is complex, the cost is high, the weight ratio of the body and the wheel system is also changed, the software of the inter-wheel control system is complicated, There are problems such as immature technology and operational risks, which greatly restrict the drive mode of hub motors and even wheel motors

In addition, for vehicles using permanent magnet motors, there are problems of high cost, thermally induced demagnetization, and secondary battery loss. The permanent magnet motor industry chain also has rare earth shortage resource consumption and environmental protection issues during mining and processing.

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