How to solve the problem of unstable wind speed of coal mine fans.

In the study of the speed of coal mine fan, it can usually be regarded as a DC speed control motor, whose speed is mainly changed by adjustable resistors. As long as the controllable rectifier acts on both ends of the motor, the speed of the fan can be manipulated.

However, we sometimes encounter problems with unstable fan speeds in operation. Once such a problem occurs, it will greatly affect its operation and use. The first thing to do is to understand the reasons for the unstable wind speed of the coal mine fan in order to solve the problem correctly.

1. Due to some problems with the four rectifier diodes of the coal mine fan, the function of the whole device is affected.

2. The motor rotor and commutator have unequal toner or carbon brushes. At this moment, you are able to check the adjustable resistance of the fan first and foremost. If the resistance changes with the adjustment, this is good.

3. The problem may lie in a broken circuit, bad touch, short circuit, untouchable, etc. In addition, if the adjustable resistor is not touching well, this can also affect the stability of the coal mine fan speed.