In general, asynchronous motors, even if the small ones are not started, the operation will use auxiliary coils and capacitors. Although the startup torque is not very powerful, the structure is very simple, the trust dependency is high, so the efficiency is compared to the efficiency thanhigh.The asynchronous motor can also achieve continuous operation and the noise is very low.Here I want to remind everyone that as the load of the asynchronous motor changes, its rated speed will also change at the same time. Therefore, everyone must pay attention to its rated speed to avoid excessive power.
The difference between asynchronous motor and synchronous motor
The biggest difference between the design difference between the synchronous motor and asynchronous motor is whether their rotor speed is consistent with the rotating magnetic field of the stator. The rotor speed of the motor is the same as that of the stator rotation magnetic field. It is called the synchronous motor. On the contrary, it is called asynchronous motor.In addition, the stator winding of the synchronous motor and asynchronous motor is the same, the difference is that the motors rotor structure.The rotor of the asynchronous motor is a short -circuit winding, which generates current by electromagnetic induction.The rotor structure of the synchronous motor is relatively complicated and there is a DC inspirational winding. Therefore, it is necessary to add an incentive power supply to introduce the current through the sliding ring. Therefore, the structure of the synchronous motor is relatively complicated, and the cost and maintenance costs are relatively high.The difference in the function and use of the synchronous motor speed is synchronized with the electromagnetic speed, and the speed of the asynchronous motor is lower than that of the electromagnetic speed. Regardless of the load size, the speed of the synchronous motor will not change.Change and change.The accuracy of the synchronous motor is high, but the construction is complex, the cost is high, and the maintenance is relatively difficult. Although the asynchronous motor responds slowly, it is easy to install and use, and the price is cheap.Therefore, the synchronous motor is widely used in asynchronous motor.Synchronous motors are mostly applied to large generators, and asynchronous motors are almost applied to electric motors.
Principles of asynchronous motor working principle
The magnetic field generated by the three -phase winding group connects the three -phase power supply in the spatial rotation, which is called a rotating magnetic field.The rotor is relative to the relative stator in the magnetic field, cutting the magnetic poplar to form an inductive electromotive force.The copper bars of the rotor are short -circuited, and the induction current is generated.The rotor copper bar has a current, which is effectively used in the magnetic field.The rotor will rotate.First: There must be a rotating magnetic field. Second: The direction of the rotor rotation is the same as the rotating magnetic field. Third: the rotor speed must be smaller than the synchronous speed, otherwise the conductor will not cut the magnetic field, the induced current is generated.After stopping, the speed slows down. Due to the poor speed, the rotor begins to rotate again, so as long as the rotation magnetic field exists, the rotor always falls behind and synchronizes the speed.
Asynchronous motor speed regulation method
1. Weak magnetic speed adjustment, change the magnetic voltage of the calendar, increase the voltage of the pressure, and lower the speed to reduce the speed.2. Change the voltage of the system, increase the voltage increase, and reduce the speed to reduce the pressure. This uses a lot.In short, changing the voltage must have a pressure regulating device, which can be a string of electric yin or a DC regulator.However, in the weak magnetic speed regulation, the magnetic voltage must be available. If there is no magnetic voltage, it will generate a speed, which is very dangerous.
What is an asynchronous motor
Asynchronous motor, it also has a familiar name -induction motor, which is a rotary magnetic field formed by a rotary magnetic field formed by the stator winding.A type of motor type.From the perspective of appearance, the type of rotor of the asynchronous motor presents a mouse -shaped, and the main function of the main function is to produce a rotary magnetic field.The scope of the application of induction motors is mainly used as a washing machine, an electric fan and a power equipment for the factory.

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