Stepless speed regulating system for magnetic gear motor rotation

Abstract

The invention discloses a stepless speed regulating system for magnetic gear motor rotation. The stepless speed regulating system comprises a double-rotor magnetic gear motor, an engine, a wheel main reducer, an inverter, a motor control unit, an engine control unit and a power management unit. Two rotors of the double-rotor magnetic gear motor are connected with a crank of the engine and the wheel main reducer respectively, non-contact coupling of magnetic torque and engine torque is achieved, and therefore frictionless energy transmission of the whole system is achieved. By means of the double-rotor magnetic gear motor, the engine can work at the working point with the highest efficiency to the largest extent, the engine can be assisted and driven by the motor in the startup and speedup process, and therefore instant oil consumption is prevented from increasing. Two sets of windings of the motor can simultaneously run in an electricity generation mode and an electric mode, and power density is high. Meanwhile, speed ratio configuration of a magnetic gear is optimized so that the structure can be most simplified on the premise that the speed ratio is closest to that of a traditional planetary gear set, and the production process of products is simplified.

Description

technical field [0001] The invention relates to a power management system, in particular to an electronic stepless speed regulation system suitable for a hybrid electric vehicle. Background technique [0002] Conventional hybrid vehicles currently use a planetary gear set as the core, supplemented by two motors and an engine to form a hybrid system structure. Due to the contact and gap between the teeth of the gear set during operation, it is easy to generate noise and wear. [0003] Some scholars at home and abroad have proposed to use the coaxial magnetic gear structure to form a differential device, thereby replacing the traditional mechanical planetary gear. However, in the traditional structure of the magnetic gear compound motor, the gap between the magnetic adjustment blocks has not been utilized; at the same time, the electromagnetic torque cannot be directly generated between the stator winding and the engine crankshaft, but must pass through the outer rotor magnet...

AI Technical Summary

Problems solved by technology

However, in the traditional structure of the magnetic gear compound motor, the gap between the magnetic adjustment blocks has not been utilized; at the same time, the electromagnetic torque cannot be directly generated between the stator winding and the engine crankshaft, but must pass through the outer rotor magnetic field

[0004] Some scholars insert a permanent magnet in the middle of the magnetic adjustment block, hoping to add a set of windings on the stator to use it. This requires arranging windings with a large number of poles on the stator, resulting in an increase in the number of stator slots, which will cause Many adverse consequences, such as: the reduction of the slot area makes it difficult to go offline under the same slot full rate; the increase of slot insulation leads to a decrease in the slot full rate and a decrease in the output of the motor; the increase in the end leads to an increase in the amount of copper used; pole shoes increase, resulting in increased stator iron loss and decreased motor efficiency; the difficulty of processing the stator core increases

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