萍乡Analysis of the situation that the motor does not turn after the power is connected

What is the reason why the motor does not rotate after being connected to the power supply? The editor tells you that the motor does not turn after being connected to the power supply, which is specifically caused by the following reasons:

1. Wiring error of control equipment;

2. The power supply is not connected, such as fuse burning, switch failure, poor contact of contacts, open circuit of leads, etc;

3. The setting value of the overcurrent relay adjustment is too small;

4. The connection between the power supply and the motor is faulty;

5. The motor winding has faults, such as phase to phase short circuit, grounding, wrong wire connection, open circuit, etc;

6. Misoperation or low starting resistance of wound rotor asynchronous motor during starting;

7. The motor bearing is faulty and stuck;

8. The friction between the stator and rotor cores (cleaning the bore) is equivalent to increasing the excessive load;

9. The motor is overloaded or the mechanical rotating part is stuck.

If the motor overheats during normal operation, it is generally caused by the following reasons:

1. The power supply voltage suddenly increases and does not match the rated voltage on the motor nameplate, or the three-phase power supply voltage is severely unbalanced;

2. The load dragged by the motor varies greatly, and the motor is temporarily in an overload state;

3. Due to bearing failure or clearance wear exceeding the limit, bending of the shaft, local overheating and deformation of the iron core, axial movement of the rotor, etc., the stator and rotor iron cores are swept;

4. Environmental dust entering the interior of the motor adheres to the insulation surface and blocks the cooling air ducts and ducts, resulting in poor ventilation of the motor, greatly reducing the cooling effect, and causing the motor to overheat;

5. The cooling device of the motor has failed, and the air temperature regulating device has malfunctioned, causing the motor to overheat;

6. Single phase operation of three-phase motors;

7. The winding has faults, such as short circuit, open circuit, grounding, incorrect connection, etc;

8. Uneven air gap, etc.

Zhejiang Jinsu Motor Co., Ltd. is an enterprise that manufactures various types of DC, AC, and three-phase asynchronous motors. The company covers a total area of over 30 acres and currently employs more than 150 employees; Having a modern garden style factory building and introducing excellent and efficient production and testing equipment from both domestic and international sources, we aim to create a sustainable manufacturing enterprise that provides customers with excellent products and services. As a modern enterprise that integrates scientific research, production, sales, and service, we are committed to building a sustainable business.