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Visit the heart of the crusher – the power motor

September 21, 2023    Hawk

For the crusher, we have to talk about its most critical part, which is the power supply device equivalent to the heart – the motor. Crusher usually uses AC motor, especially three-phase asynchronous motor, also known as induction motor. The power profile of this motor can be determined based on the specific model and specification, but generally speaking, they can provide very powerful power to meet the needs of the crusher.

Here are some advantages and disadvantages of three-phase asynchronous motors:


  1. High efficiency: Three-phase asynchronous motors are generally very efficient, especially at full load, which means they can convert electrical energy into mechanical energy more efficiently.
  2. Simple and durable: The structure of this type of motor is relatively simple, without complex brushes or commutators, so they are generally more durable and have lower maintenance costs.
  3. Self-starting: The three-phase asynchronous motor can start directly from a stationary state without additional starting equipment.

Wide range of power selection: Three-phase asynchronous motors can range from a few kilowatts to several thousand kilowatts to meet various application needs.


  1. Large starting current: Three-phase asynchronous motors will produce large currents when starting, which may have an impact on the power system, so special starting equipment is usually required.
  2. Difficulty in speed adjustment: The speed of this kind of motor mainly depends on the power frequency, so it is difficult to adjust the speed. However, there are now devices such as frequency converters that can solve this problem.
  3. Brushless motors are more efficient: Although the efficiency of three-phase asynchronous motors is already very high, compared with brushless DC motors, their efficiency is still slightly lower.

In general, the three-phase asynchronous motor is a very practical motor type, especially suitable for use in equipment requiring high power such as crushers.

After fully understanding and deeply understanding the motor structure of the crusher, our users will consider how to repair it when a fault occurs. However, the maintenance of the crusher motor should still be carried out by professional motor maintenance personnel, but understanding It’s okay to learn something to prepare for emergencies. Here are some basic steps on how to repair a motor:

  1. Power outage: Before performing any maintenance work, first ensure that the power supply is completely disconnected to prevent electric shock.
  2. Appearance inspection: Check the motor housing for obvious damage, such as cracks, breakage or corrosion. Check that cables and connectors are intact and not broken or loose.
  3. Temperature and noise: When the motor is running, pay attention to the temperature and noise of the motor. If the motor is overheating or making excessive noise, it may indicate a problem within the motor.
  4. Vibration check: Check whether the motor has abnormal vibration. Excessive vibration may indicate damaged bearings or loose internal components of the motor.
  5. Insulation test: Use an insulation resistance meter to check the insulation resistance of the motor winding to ensure that the insulation performance of the motor is good.
  6. Motor winding inspection: Check the motor windings for signs of burning, short circuit or grounding. If so, the motor may need to be replaced or professional winding repair done.
  7. Cleaning: Remove dust and dirt inside and outside the motor to prevent overheating and degradation of insulation performance.
  8. Bearing lubrication: Check the lubrication of the bearings and add an appropriate amount of lubricating oil or grease if necessary.
  9. Reassembly and testing: After completing all maintenance work, reassemble the motor and perform tests to ensure normal operation of the motor.

Please note that the maintenance of motors requires professional knowledge and skills. If you are not a professional, it is recommended to find a professional motor maintenance service. If it is not an emergency, it is recommended that you do not try to repair it easily. After all, for this kind of electrical equipment There is still a possibility of danger.

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