What are asynchronous motors and synchronous motors
Symmetrical three phase winding ventilation with symmetrical three phase current, to produce a rotating magnetic field, magnetic field line cutting rotor winding, according to the principle of electromagnetic induction, rotor winding of e and I, rotor winding by the effect of electromagnetic force in the magnetic field, electromagnetic torque, which make the rotor rotation, the rotor output mechanical energy, drive the mechanical load. Rotor speed n < n0, so called asynchronous motor. S = (n0-n)/n0, which is called the slip rate, is an important parameter to the asynchronous (motion) machine. SN is the rated slip.
The difference between asynchronous motor and synchronous motor is that rotor speed is different, the rotor speed of asynchronous machine is less than synchronous speed, and the rotor speed of synchronous machine is synchronous speed. Note: in the asynchronous machine, there is a rotating magnetic field at the same speed as the synchronous speed, the synchronous velocity is 60f/p, f = 50hz, and p is the logarithmic logarithm. Further excitation of the rotor of the synchronous machine; The asynchronous machine is not used, and can directly from the stator to the rotor.
Motor servo motor is also called the implementation, in the automatic control system, is used as actuators, converts the received electrical signal into angular displacement or velocity of motor shaft output. Divided into two major categories of dc and ac servo motor, its main characteristic is, when the signal voltage is zero no rotation, speed decreases with the increase of torque and uniform,
Stepping motor is an actuator that converts electrical impulses into angular displacement. Popular point: when the stepper driver receives a pulse signal, it is driving a stepper motor according to set the direction of a fixed Angle (and the step Angle). You can control the amount of angular displacement by controlling the number of pulses, so that the target is accurate. At the same time, you can control the speed and acceleration of the motor by controlling the pulse frequency. There are three types of steps: permanent magnetic (PM), reactive (VR) and hybrid (HB). The permanent magnet step is generally two phases, the torque and volume are small, the step Angle is usually 7.5 degrees or 15 degrees. The reaction type step is generally three-phase, can realize the big torque output, the step Angle usually is 1.5 degrees, but the noise and vibration are very large. Developed countries such as the United States and Europe were eliminated in the 1980s. Hybrid step refers to the advantage of mixing permanent magnet and reactive type. It is divided into two phases and five phases: the Angle of two phases is 1.8 degrees and the Angle is 0.72 degrees. This step is the most widely used.
What is a dc motor? A: the output or input is a rotary motor for direct current energy, known as dc motor What is ac motor A: the output or input is a rotary motor for alternating current energy, known as ac motor. 3, what is a step motor
