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Excitation mode of DC motor
source：未知 time：2022-04-07 15:17nbsp; click：
Excitation mode of DC motor
1. Excitation motor: The excitation winding of the DC motor has no electrical connection with the armature, and the excitation circuit is supplied by another DC power supply. Therefore, the field current is not affected by the armature terminal voltage or armature current.
2. DC motor shunt motor: the circuit is connected in parallel, shunt, the voltage across the shunt winding is the voltage across the armature, but the excitation winding is wound with thin wires, and the number of turns is large, so it has a large resistance, so that through other The excitation current is small.
3. DC motor series motor: The current of the DC motor is connected in series, divided by voltage, and the excitation winding is connected in series with the armature, so the magnetic field in this motor changes significantly with the change of the armature current. In order not to cause large losses and voltage drops in the excitation winding, the smaller the resistance of the excitation winding, the better, so the DC series motor is usually wound with a thicker wire with fewer turns.
4. DC motor compound excitation motor: The magnetic flux of the motor is generated by the excitation current in the two windings.
1. Excitation motor: The excitation winding of the DC motor has no electrical connection with the armature, and the excitation circuit is supplied by another DC power supply. Therefore, the field current is not affected by the armature terminal voltage or armature current.
2. DC motor shunt motor: the circuit is connected in parallel, shunt, the voltage across the shunt winding is the voltage across the armature, but the excitation winding is wound with thin wires, and the number of turns is large, so it has a large resistance, so that through other The excitation current is small.
3. DC motor series motor: The current of the DC motor is connected in series, divided by voltage, and the excitation winding is connected in series with the armature, so the magnetic field in this motor changes significantly with the change of the armature current. In order not to cause large losses and voltage drops in the excitation winding, the smaller the resistance of the excitation winding, the better, so the DC series motor is usually wound with a thicker wire with fewer turns.
4. DC motor compound excitation motor: The magnetic flux of the motor is generated by the excitation current in the two windings.
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