Why does the series motor rotor drip paint?_Power-on detection method of series motor

Why does the rotor of the series motor drip paint?

The main purpose of dripping paint on the rotor of a series-excited motor is to improve the insulation and corrosion resistance of the motor.

When the motor is running, the rotor is subjected to electromagnetic and mechanical forces, which will cause friction and vibration, which can easily lead to winding wear, wire breakage or insulation failure. In order to improve the insulation performance of the winding and reduce the vibration and noise of the rotor during operation, a layer of insulating paint is often applied to the rotor. Insulating paint can increase the insulation distance between the winding and the core, prevent short circuits between windings or between windings and the core, thereby improving the safety and reliability of the motor.

In addition, the motor will be affected by the environment during use, such as humidity and high temperature, which can easily cause the iron core to rust and the winding to be damp and corroded, and even cause the motor to fail. In order to prevent this from happening, a layer of anti-corrosion paint can be applied on the rotor to protect the motor from environmental influences.

It should be noted that the rotor should be painted with suitable paint, applied evenly, and the quality and performance of the insulating paint and anti-corrosion paint should meet the requirements to ensure the normal operation and service life of the motor.

Power-on detection method for series motor

The method for detecting the power-on of the series motor is as follows:

Prepare the circuit: Connect the power supply between the armature and brushes of the series motor and turn on the power.

Observe the motor rotation: When the power is turned on, the rotor of the series motor should start to rotate. Observe whether the motor is rotating in the correct direction, that is, whether the direction of rotation is the same as expected. If the direction is incorrect, you need to swap the brush position or change the electrode polarity.

Measure the motor voltage: Use a multimeter or digital voltmeter to measure the voltage of the motor, that is, the armature voltage. If the voltage is abnormal or zero, it may be a fault in the circuit or the motor itself. If the voltage is normal, proceed to the next step.

Measuring motor current: Use an ammeter to measure the motor current, i.e. the armature current. If the current is abnormal or zero, it may be a fault in the circuit or the motor itself. If the current is normal, proceed to the next step of detection.

Measure motor speed: Use a tachometer or other device to measure the motor speed and determine whether the speed meets the requirements based on application requirements.

Observe the motor operation status: Observe the motor operation status, including noise, vibration, etc. If there is any abnormality, it needs to be checked and repaired.

It should be noted that before conducting a power-on test on a series-excited motor, a safety check should be conducted on the circuits and equipment, and necessary safety measures should be taken to prevent accidents.