Essential Details

Packaging & Delivery

Port:SHENZHEN

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Maintenance of DC Brushless Motors

(1) Before disassembly, use compressed air to blow off the dust on the surface of the motor and wipe it clean.

(2) Select the working location for motor disassembly and clean the on-site environment.

(3) Familiar with the structural characteristics and maintenance technical requirements of the motor.

(4) Prepare the necessary tools (including special tools) and equipment for disassembly.

(5) In order to further understand the defects in the operation of the motor, an inspection test can be conducted before disassembly if conditions permit. To this end, the motor will be tested with a load, and the temperature, sound, vibration, and other conditions of each part of the motor will be checked in detail. The voltage, current, speed, etc. will be tested, and then the load will be disconnected. A separate no-load inspection test will be conducted to measure the no-load current and no-load loss, and records will be kept.

(6) Cut off the power supply, remove the external wiring of the motor, and keep records.

(7) Select a suitable voltage megohmmeter to test the insulation resistance of the motor. In order to compare the insulation resistance values measured during the last maintenance to determine the trend of insulation change and insulation status of the motor, the insulation resistance values measured at different temperatures should be converted to the same temperature, usually converted to 75 ℃.

(8) Test the absorption ratio K. When the absorption ratio is greater than 1.33, it indicates that the motor insulation has not been affected by moisture or the degree of moisture is not severe. In order to compare with previous data, it is also necessary to convert the absorption ratio measured at any temperature to the same temperature.

Brushless hair dryers usually contain an electric heating element Q, which is used to heat the air to form hot air. The control circuit is responsible for controlling the speed and direction of the motor to realize different functions of the hair dryer, such as speed regulation and temperature control.