Why Does The DC Motor Generate Sparks?

During the operation of the motor, sparks will be generated, and in severe cases, the phenomenon of excessive sparks will occur. So what is the reason for this phenomenon? How to eliminate it?

What is the reason for the excessive spark of the brush of the DC gear motor:

1. The brush of the DC gear motor is not on the neutral line;

2. Improper rotor dynamic balance correction;

3. The DC gear motor is overloaded or the power supply voltage is high;

4. The surface of the commutator is not smooth or the mica sheet is protruding;

5. The armature winding or the magnetic pole winding or the commutation pole winding is faulty;

6. Improper brush pressure, poor contact with commutator, brush wear or wrong brand of brush.

2. Processing method of brush spark generation:

a If the adjustment of the additional pole is not good, use shunt or adjust the air gap of the additional pole, or change the type of brush;

b Protruding mica, undercut mica or use a more abrasive brush;

c The connection of the commutator rising piece is disconnected - and re-welded;

d The position of the brush is incorrect, adjust the brush holder to the correct position;

e The spacing or arrangement of the brush holders is uneven, correct the spacing and arrangement of the brush holders;

f The commutator or slip ring is eccentric, turned or reground at rated speed;

g The commutator is loose and the commutator piece is high and low - tighten it, turn it or regrind it;

h The commutator plate is dirty, clean the commutator plate and seal the bearing;

i Brushes stuck or stuck in the brush holder, check the brush size is correct, clean the brush and brush holder to remove burrs

The above are the reasons for the excessive spark of DC motor brushes, and the corresponding treatment methods are also shared with you. I hope that when you encounter problems during use, you can find the reasons in time and accurately, and create greater benefits for the company.