Analysis and treatment method of the reason why the single-phase series electric drill cannot be started
One. Circuit failure symptom:
Troubleshooting:
1. The power cord is broken or the connector is loose
2. The charcoal brush is not in contact with the commutator
3. The armature winding or stator coil is broken
4. The switch is damaged or has poor contact
5. The power supply has no voltage
Treatment:
Replace the power cord or consolidate the connector - adjust the spring pressure or replace the brushes - repair or replace the switch - check the power circuit
Two. The circuit is on, and the fault phenomenon cannot be started when there is no load
Troubleshooting:
1. The bearing is too tight, and the armature spindle is stuck
2. The brush is not on the neutral line, and the commutator is not working properly
3. The stator winding is short-circuited, damaged by moisture or insulation
4. The armature red group is short-circuited, and there is conductive powder in the middle of the commutation sheet
Treatment:
Change the oil or replace the bearing - move the brushes so that the brushes are on the neutral line - remove the conductive powder from the commutation sheet
Three. The circuit is on, and the fault phenomenon cannot be started when the load is loaded
Troubleshooting
1. Low power supply voltage
2. The brush is not on the neutral line
3. The stator wire is short-circuited, damp or damaged by insulation
Treatment:
Adjust the supply voltage
Move the brush holder so that the brushes are on the neutral line
