Special high/low-speed multi-motor clutch type combined brushless DC (direct current) motor for passenger car

Abstract

The invention discloses a special high / low-speed multi-motor clutch type combined brushless DC (direct current) motor for a passenger car. The motor comprises more than two rotation shafts; the rotation shafts are sequentially and coaxially connected through a one-way clutch; each rotation shaft is provided with a rotor; a stator is mounted in a base corresponding to each rotor so as to form more than two independent sub-motors; mutual interference among the electric circuits and magnetic circuits of the sub-motors is avoided; the sub-motor beside an end cover of a non-shaft extension end is an auxiliary torque increasing motor with low rotation speed and high torque, and the other sub-motors are main motors with high rotation speed and low torque; the winding circuit and the Hall sensor circuit of each sub-motor are independent and are respectively connected to respective controllers; and an external DC power supply is connected with each controller through a group of power switches, and controls the power on / off of each sub-motor. Through the invention, the problems that the brushless DC motor has low start torsion and high power, the cost of a high-peak current controller is excessively high and the like are solved.

Description

technical field [0001] The invention belongs to a special direct current motor for passenger cars, in particular to a high and low speed multi-motor clutch type combination brushless direct current motor special for passenger cars. Background technique [0002] At present, the motors used in electric passenger vehicles in my country are basically brushed DC motors and brushless DC motors. The advantage of the brushed DC motor is that the starting current is large and the starting torque is large. The disadvantage is that the efficiency is low, and the brushes and slip rings need to be replaced during use, making maintenance difficult. The advantages of brushless DC motors are high efficiency and maintenance-free. The disadvantages are that the starting current and torque are smaller than those of brushed DC motors, and it is difficult to meet the functional needs of direct-drive electric passenger vehicles. In order to overcome the shortcomings of the brushless motor's smal...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to aim at the above-mentioned defects existing in the existing electric passenger car motors, to provide a brushless DC motor with high and low speed multi-motor clutch combination, which is specially used for electric passenger cars, can increase the starting torque, and save energy. , while solving the problem of high cost of high-power high-peak current controllers

Images