Permanent magnet motor, electric equipment and electric vehicle

Abstract

The invention discloses a permanent magnet motor, which comprises a sealed motor body, a fan arranged at the end opposite to the output end of the motor body, and a fan driving motor used for drivingthe fan. The output end of the fan driving motor is in transmission connection with the fan. The invention further discloses electric equipment and an electric vehicle comprising the permanent magnetmotor. The permanent magnet motor, the electric equipment and the electric vehicle provided by the invention are good in sealing performance, waterproof, dustproof and good in heat dissipation performance, and can meet the heat dissipation requirement during high load.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to permanent magnet motors, electric equipment and electric vehicles. Background technique [0002] With the development of electric vehicle power technology, permanent magnet motors have become the main choice of electric vehicle power devices due to their advantages such as small size, high efficiency, adjustable speed, and many controllable parameters. At present, permanent magnet motors will generate a lot of heat when they are used. The higher the load, the more heat will be generated. In the actual use of electric vehicles, especially in the actual use of three-wheeled electric vehicles, the actual load far exceeds the designed rated load. The permanent magnet motor is very hot, and the temperature rises quickly. The high temperature environment will reduce the continuous use time of the permanent magnet motor for normal driving and affect the user's work efficiency. [0003] ...

AI Technical Summary

Problems solved by technology

The natural air-cooled fanless structure has better sealing effect, but the heat dissipation effect is poor, which is far from meeting the heat dissipation requirements of permanent magnet motors; the heat dissipation effect of mechanical fans is slightly better, but most of the fans of permanent magnet motors are compatible with the rotors of permanent magnet motors. Drive connection, the fan speed is consistent with the rotor speed of the permanent magnet motor, but when the permanent magnet motor is running under high load and needs to dissipate heat quickly, the rotor speed of the permanent magnet motor is slow, and the mechanical fan speed drops to a very low heat dissipation effect. Time usage requirements; the fan is connected to the rotor of the permanent magnet motor through transmission. No matter whether the fan is installed inside or outside the casing, the sealing effect of the permanent magnet motor is not good. The fan is installed in the casing, and the air flowing under the drive of the fan needs Ventilation openings are set on the casing, and the fan is arranged outside the casing. One end of the rotor needs to be connected to the actuator, and the transmission mechanism connected to the rotor of the permanent magnet motor needs to protrude from the other end of the permanent magnet motor and relative to the permanent magnet motor. When the magneto rotates, the sealing performance of the extension of the transmission mechanism is not good, and an additional sealing structure needs to be provided. The existing permanent magnet motor has poor sealing performance, and rainwater, dust, etc. are easy to enter the permanent magnet motor housing, which will affect the permanent magnet motor.

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