ABB High Voltage AC Motor

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Q:What are the advantages of AC motors?
Compared to the AC motor and DC motor, because there is no commutator (see DC motor commutation), therefore has the advantages of simple structure, convenient manufacture, relatively strong, easy to make high speed motor, high voltage, high current, large capacity.
Q:What is AC induction motor?
The rotor does not directly enter the AC, the rotor is equipped with a closed loop conductor. The rotating magnetic field does relative motion with the rotor, and the closed conductor on the rotor cuts the magnetic field lines to produce an electric current, which then interacts with the rotating magnetic field of the stator so as to drive the rotor to rotate. As described above, the current in the rotor is induced by the rotating magnetic field of the stator, so it is called induction motor.
Q:What are the advantages and disadvantages of AC and DC motors?
The DC motor is easier to control than the AC motor. It can be applied to a wide range of speed regulation. It can be used in power braking, but it is more complex and more complicated than the maintenance of AC motors.
Q:How to choose the AC motor?
The motor is nothing more than the source of mechanical power and speed. The speed and power required for the operation of the equipment can be calculated and the model can be selected.
Q:What is the size of DC motor and AC motor under the same power?
In general, the DC motor is large in size, but it depends on whether the supply voltage of the two motor is the same.
Q:Can any AC motor 220 and 380V control positive inversion? What are the conditions?
All three phase motor, the 3 phase line in any two lines can be switched to control the motor positive and reverse, commonly used AC contactor control, reverse switch control (small capacity) and so on.Single-phase capacitor running motor ends of the main winding or secondary winding can be controlled on the motor is reverse.
Q:Why can single-phase AC motors be controlled by voltage?
Simply put, after the voltage is lowered, if the rotor spins at its original speed, the stator gets a very small current. The electromagnetic torque decrease under the same load torque under the action of slip increase speed decreased, resulting in decreased speed reflected impedance decreases according to the size of the formation of a low impedance voltage and current speed speed balance, therefore maintained at a low speed.
Q:Who knows the main difference between DC motor and AC motor, I hope to say a little more simple, thank you
DC motor speed control is simple, but the use of limited occasions. AC motor speed control is relatively complicated, but it is widely used due to the use of AC power supply.
Q:What are DC and AC servo motors? What are the characteristics?
A rotating motor with input or output as direct current energy. Simulation of speed control system it is generally consists of 2 closed loop, both speed loop and current loop, which enables the two to coordinate each other, play the role of the 2 regulators in the system set up, adjust the speed and current respectively. The 2 feedback closed loop adopts the nested structure of one ring and one ring in structure, which is called double closed loop speed regulating system. It has the advantages of fast dynamic response and strong anti-interference ability, so it has been widely applied. PI or PID circuit is usually composed of analog operational amplifier, and the signal conditioning is mainly to filter and amplify the feedback signal. Considering the mathematical model of DC motor speed control system, simulation of dynamic transfer function in the debugging process simulation of speed control system, because the parameters of the motor or load the mechanical characteristics and the theoretical value is different, often require frequent replacement of R, C and other components to change the circuit parameters, dynamic performance index to obtain the expected, do it is very troublesome, if the use of programmable analog components regulator circuit, system parameters such as gain, bandwidth and circuit structure can be modified by the software, it is very convenient for debugging.
Q:What kinds of AC motors are divided into?
AC motors are usually divided into AC generators, AC motors and synchronous regulators according to their functions.AC motors are divided into two major categories: synchronous motor and asynchronous motor.

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