What is Series motor?
A series motor is a kind of motor which the stator coil (excitation winding) is connected in series with the rotor coil ( armature winding) through a carbon brush and a commutator and then connected to a power supply. Single-phase series motors are commonly known as series motors or general motors.
1.Components
The single-phase series motor is mainly composed of stator, armature, bracket, brush holder and commutator.
Stator: The stator is the mechanical support of the entire motor to generate the main magnetic flux. It is mainly composed of the stator core and the excitation winding.
Armature: The armature is also called the rotor, which is the rotating part of the motor and the most important part of the motor. The role of the rotor is to generate electromagnetic torque, thereby transforming electrical energy into mechanical energy. It consists of a rotating shaft, an iron core, an armature winding, a commutator and a cooling fan.
Commutator: The commutator is surrounded by many trapezoidal segments. The commutator segment and the commutator segment are generally insulated by mica flakes, and glass fiber phenolic plastic is pressed in the half moon grooves at the lower ends of the commutator segment, so that the commutator segments can be integrated.
Carbon brush holder: The carbon brush holder is composed of a chassis, a brush holder, a spring and a carbon brush.
2. Motor schematic diagram
The stator winding and the armature winding of the universal motor are connected in series. See below. The stator current is the armature current, and the magnetic flux Q generated by the stator is almost in phase with the armature current. If the load increases during the operation of the motor, the current and magnetic flux also increase, but the speed decreases, maintaining the output power unchanged. P2=Mn/9.55(W), where M is torque (N.m) and n is speed (rpm).
