Precautions

Update:22-12-2018
Summary:

Precautions 1 see random files The motor fan is equippe […]

Precautions
1 see random files
The motor fan is equipped with instructions for use, product certificate, electrical circuit diagram and packing list. Check the packing list and check the parts.
2 Look at the shape of the motor fan
Look carefully at the motor fan cover and the fan blades for obvious deformation. Rotating the blades should be light and flexible and should not always stop at the same location.
3 see startup performance
The starting performance is an important quality indicator of the motor fan. During the test, in the slow speed, the rated voltage of the power supply is 85%, the motor fan should be able to start from a standstill and operate normally. The shorter the time required for a motor fan to start from normal to normal operation, the better the starting performance of the motor fan. .
4 see speed performance
After power-on, there should be no abnormal noise in the mechanical transmission part of the fan. When the electric fan is running at high, medium and low speeds, the motor and the fan blades should be stable, with low vibration and low noise. Motor fan shake head, stop swing should be agile, no intermittent, stagnation and jitter.
5 See if there is leakage
After the motor fan is powered, if the hand touches the electric power, it is tested with the test pencil. The test pencil also has a light-emitting display, which can determine the leakage of the outer casing.
6 See the continuous operation of the motor fan
After the electric fan has been running continuously for 2 hours, if the surface of the head casing is hot, the temperature is too high to be used. Under normal circumstances, the surface temperature of the head casing is below 50 °C, and there should be no hot feeling.
A motor is a device that converts electrical energy into mechanical energy. It uses a coiled coil (that is, a stator winding) to generate a rotating magnetic field and acts on a rotor (such as a squirrel-cage closed aluminum frame) to form a magnetoelectric rotational torque. The electric motor is divided into a direct current motor and an alternating current motor according to the use of the power source. The electric motor in the electric power system is mostly an alternating current motor, and may be a synchronous motor or an asynchronous motor (the stator magnetic field speed of the motor and the rotational speed of the rotor are not kept at the synchronous speed). The motor is mainly composed of a stator and a rotor, and the direction in which the energized wire is subjected to the force in the magnetic field is related to the direction of the current and the direction of the magnetic induction line (the direction of the magnetic field). The working principle of the motor is that the magnetic field acts on the current to force the motor to rotate.