Motor system and electric vehicle or hybrid vehicle using the same

Abstract

The invention provides a motor system and an electric vehicle or a hybrid electric vehicle using the motor system, and belongs to the technical field of electric vehicles. The motor system is applied to the electric vehicle and comprises a motor and a motor control unit, wherein a rotary transformer and a corresponding rotary transformer decoding unit are arranged at one end where the motor is located of the motor system, and digital signals output by the rotary transformer decoding unit are transmitted to the motor control unit through radio frequency communication. The quality of analog signals transmitted by a rotary transformer wiring harness in the motor system can be ensured easily and is not prone to be interfaced by external electromagnets, the rotary transformer wiring harness can be arranged on the whole vehicle easily, the degree of freedom of arrangement position of the motor is large relative to the motor control unit, and the motor system is suitable for flexible arrangement of the whole vehicle of the electric vehicle.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and relates to a motor system in an electric vehicle or a hybrid vehicle, in particular to a motor system using a radio frequency (RF) technology wireless rotary transformer and an electric vehicle or a hybrid vehicle using the motor system . Background technique [0002] A resolver (Resolver or Transformer) is an electromagnetic sensor, also known as a synchronous resolver, which is usually provided with a rotor and a stator. Among them, the stator winding is used as the primary side of the transformer to receive the excitation voltage; the rotor winding is used as the secondary side of the transformer to obtain the induced voltage through electromagnetic coupling. The working principle of the resolver is basically similar to that of the ordinary transformer, the difference is that the primary and secondary windings of the ordinary transformer are relatively fixed, so the ratio of the outpu...

AI Technical Summary

Problems solved by technology

[0005] exist figure 1 When the motor system shown is applied to an electric vehicle, the motor 110 and its corresponding motor control unit 130 may need to be separated by a relatively long distance according to the layout requirements of the vehicle. Therefore, the required resolver harness 150 is relatively long. Long, it is easy to affect the signal quality and is more susceptible to electromagnetic interference (external electromagnetic interference, etc. may easily cause errors in the calculated rotor position); in addition, when the longer resolver harness 150 is arranged in the car body, additional protection is required , bracket device

Images