The fixed part of the motor is called the stator, on which a pair of DC excited static main magnetic poles are installed; The rotating part (rotor) is called the armature core, on which the armature winding shall be installed. After being energized, it will generate an induced electromotive force to act as a rotating magnetic field, and then generate an electromagnetic torque for energy conversion.The type of stator is distinguished by the shape of stator winding and the embedded wiring method. According to the shape of coil winding and the embedded wiring method, the stator winding can be divided into centralized and distributed types.
Function
The rotor and stator form a generator or motor to realize the conversion device between electrical energy and mechanical energy and between mechanical energy and electrical energy. For the generator, the rotor is a reactive power source. The windings introduce DC from the outside to establish a magnetic field. Driven by the driving force, the rotor transmits AC reactive power to the outside. The reactive power is determined by the DC input to the rotor. The stator is the active power source, which generates the induced electromotive force and current. Under the drag of the rotor, it outputs the active power of alternating current outward. The magnitude of the active power is determined by the driving force (oil volume, air volume, air volume, water volume, etc.). For the motor, when the stator winding is energized with AC, a rotating magnetic field will be generated, and the magnetic force line of the rotating magnetic field will form a loop through the stator core, air gap and rotor core. As the conductor of the rotor winding of asynchronous motor moves relative to the rotating magnetic field, the electromotive force will be induced by cutting the magnetic line of force, so the rotor winding will flow current. The current carrying rotor winding conductor will be subjected to electromagnetic force in the rotating magnetic field. Under the action of the electromagnetic torque formed by the electromagnetic force, the motor rotor rotates along the square wind of the rotating magnetic field to drive the required mechanical work.
How to Distinguish Them
The stator is a fixed part of the motor, which is mainly composed of three parts: stator core, stator winding and base. Its main function is to generate rotating magnetic field. The rotor is the rotating part of the motor, which is composed of the rotating shaft, rotor core and rotor winding. There is an excitation winding on the rotor. When the excitation current is applied, because the rotor rotates under the action of the original power, an alternating magnetic field is generated. The three-phase windings of the stator cut off the magnetic lines of force in turn, which will induce an AC electromotive force of the same size with an electrical angle difference of 120 °. The stator is equivalent to a wire, while the rotor is an electromagnet. The rotor is energized and then rotated by the prime mover to form a rotating magnetic field. Instead, the wire (stator) cuts off the rotating magnetic field (rotor), which causes an induced potential to form in the wire, and then the switch closes the wire to allow current to flow.
Product Working Principle
When the magnetic field generated by the stator of the motor interacts with the magnetic field generated by the rotor, the motor rotor operates; After the motor stator is energized, there will be a magnetic field around it; The rotor will have induced electromotive force generated in the magnetic field, and there will be current passing through the closed loop rotor circuit. Similarly, there will be a magnetic field formed around the rotor; When two magnetic fields are of the same polarity, repulsion will occur; In the process of constantly changing the phase sequence of the stator power supply of the motor, the magnetic field of the stator is also constantly changing, and the motor keeps rotating.
Features
1. Low coercive force, high initial permeability: it can reduce the action current of the leakage switch. 2. High saturation magnetic induction intensity:. It is conducive to selecting higher working magnetic induction points 3. High permeability of stator and rotor iron core: greatly improve the accuracy of transformer and reduce the ratio difference. 4. Light weight and low cost: 5. It has good anti overload strength and good temperature stability: it can work at 55-130 ºC for a long time.
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