Ace Wound Rotor Induction Motor Diagram
The stator of a wound rotor motor is the same as a typical induction motor but the rotor has a three phase winding with each of the winding terminals connected to separate slip rings.
Wound rotor induction motor diagram. They are usually built for motors in sizes up to 40 hp 29 84 kw and for rotor currents up to 100 amperes. Wound rotor induction motor is used in applications which require smooth start and adjustable speed. Slip ring induction motor is one of the types of 3 phase induction motor and is a wound rotor motor type.
Starters of this type usually provide for a 50 speed reduction when the motor operates under full load at normal speed. Given diagram exhibits the group of induction motor torque speed characteristic curves for speeds above base speed assume that the stator voltage remains constant. As the motor accelerates.
The rotor is wound for the same number of poles as that of the stator. Adjusting the resistance allows control of the speed torque characteristic of the motor. Three phase wound rotor induction motor.
In contrast a traditional induction motor aka squirrel cage motor has windings that are permanently short circuited by an end ring. Their sole purpose is to allow resistance to be placed in series with the rotor windings while starting figure below. However no power is applied to the slip rings.
Wound rotor motors can be started with low inrush current by inserting high resistance into the rotor circuit. A typical wiring diagram of a combined faceplate starter and speed regulator for use in the rotor circuit of wound rotor induction motors is shown in fig. Consider figure 1 in which a one loop wire for simplicity is placed inside a rotating magnetic field.
The motor which employing the wound rotor is known as a slip ring induction motor or phase wound motor. It consists laminated cylindrical core which has a semi closed slot at the outer periphery and carries three phase insulated winding. Type of induction motor for ac in which the rotor has wire winding.