ABB Low Voltage AC Motor QABP

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Q:AC servo motors generally choose synchronous or asynchronous?
This will be based on your purpose, such as CNC machine tools feed shaft, generally use AC synchronous servo motor, spindle general use AC asynchronous motor. The same power synchronous machine is much more expensive than the asynchronous machine. If it is common use, select synchronization
Q:How do I know whether the motor is a direct current motor or an AC motor?
Generally larger motors are ACThey also have nameplates,If you have a strong practical ability, you can open it and have a lookMost of the passengers with magnet are DC motorsA small motor, some also have a magnet, but the armature is a magnet, stator coilAC motors generally do not have magnets, and stators and rotors are coils
Q:Which is better, alternating current tubular motor and direct current tubular motor?
The advantages of DC motors (compared with AC motors) are: to achieve economic, smooth speed characteristics. And AC motor need to use inverter, electromagnetic regulator and other components to achieve this function.With the same power, the same speed (must be the same speed) compared with DC motor and AC motor, DC motor of the expensive price point, mainly because of its complicated structure must have "commutator" to achieve AC-DC conversion. This also increases the manufacturing cost of DC motors to a certain extent.
Q:Can AC motors be converted into generators?
AC motors can be converted into generators.The rotor can be removed, carefully removing the aluminum bars in the rotor and the aluminum shorting rings at both ends, and adding the winding around the excitation. Connect the slip ring and carbon brush with the excitation circuit. This method is difficult to operate, but can adjust the output voltage by adjusting the magnetic field.
Q:What's the meaning of the center height of the three-phase AC motor?
The base length represented by international letters: S - M - in short, a base seat, L - long seat, usually according to determine the length of stator core.80 of the frame as the figure "H", that is "80mm".
Q:Can any AC motor 220 and 380V control positive inversion? What are the conditions?
There are commonly used reverse switch control (Figure 1), switching control (Figure 2) and AC contactor controlSingle-phase series motor (portable electric tools) can be 2 lines of stator winding connected between the carbon brush can brush with control of the motor is reverse.Single-phase shaded pole motor with self shading coil can not change the position of the short circuit and embedded in the stator slots, the motor is not reversed.
Q:AC motor stator winding does not turn, why the back EMF?
Back EMF is the electromotive force in the opposite direction of the electromotive force of the power supply. EMF may occur when there are multiple power supplies in the circuit. For example, the two metal bars on the same rail circuit cut the magnetic field at different speeds, and there may be a counter electromotive force; the electromotive force and the induced electromotive force exist simultaneously, and the back EMF may occur. For the coil, when the current of the winding changes, both ends of the coil will generate back electromotive force. For example, in the LC oscillating circuit, the change of the voltage at the two ends of the inductance coil is closely related to the counter electromotive force. When the motor coil turns, the back EMF is also generated.
Q:AC or DC motors for rolling gate motors?
Roll gate, also known as "rolling door", is a lot of joint activities of the doors and pieces connected together, in a fixed slide, with the center of the scroll above the center of the rotating door up and down.Roll gate (gate) is suitable for commercial appearance, garage, shopping malls, hospitals, factories and mines, enterprises and other public places or houses.
Q:How to change AC motor to DC motor?
DC motor actually through the role of brush and commutator, the actual winding flow is also alternating current. AC motor brushless, DC motor needs brush, can not change.The direct current motor uses direct current, and the alternating current motor uses alternating current.
Q:AC operation of AC motor control circuit must be used?
Yes, commutator is requiredThe commutator is a component of a DC permanent magnet series motor that allows the motor to continue to rotate.Structurally, the commutator is a plurality of contact pieces which are round in shape and are connected with each tap of the rotor respectively, and two electrodes are connected outside to be called an electric brush to contact with them, and only two of them are contacted at the same time.

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