Brushless Three-phase AC Induction Motor

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FAQ

What are the speed control methods for motor products?
1. Voltage modulation control: By changing the voltage of the motor, thus affecting the speed of the motor. This method is commonly used for DC motors or AC motors with SCR.

2. Frequency modulation control: by changing the supply frequency of the motor, thus affecting the speed of the motor. This method is often used for AC motors controlled by inverters.

3. Soft start control: By gradually increasing the voltage or frequency so as to make the motor start smoothly and protect the motor and related equipment.

4. Constant current/constant torque control: By adjusting the input current or output torque of the motor to keep the motor at a constant speed. Commonly used in stepper motors or DC motors.

5. Torque/Speed Curve Control: By adjusting the output torque and speed curve under different working conditions to achieve different required speed and load requirements. 6.

6. Vector control: By controlling the motor current and voltage simultaneously, the motor speed and torque can be controlled precisely. It is commonly used in high performance AC motors and brushless DC motors.

7. PID control: Control the motor in terms of speed, torque or position through a feedback control system. Commonly used in systems that require high precision position control.

What are the failure mechanisms of electric motor products?
The failure mechanism of motor products includes the following. 1.

1. Insulation failure: the insulation layer of the motor may be affected by factors such as galvanic corrosion, excessive voltage, etc. Breakage and open circuit may occur, resulting in the inability of the motor to operate.

2. Bearing wear: bearing is one of the important parts inside the motor, if used for too long or under unsuitable conditions, the bearing surface will wear out, leading to increased noise and vibration of the motor, and may cause the motor to collapse.

3. coil burn: If the motor runs at high power, a large amount of heat will be generated in the coil, if the heat is not dissipated in time, it may cause damage to the coil or even burn the phenomenon.

4. brush wear: brush is one of the important parts of the motor, its contact surface will wear with the use of time, if not replaced in time, it will lead to electric spark, motor noise increases, and even lead to motor burn.

5. other factors: motor use process by voltage fluctuations, short circuit, external vibration and other factors, may also lead to the failure of the motor.

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