ABB High Voltage AC Motor

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Q:AC motor speed regulator
Now is the best performance of AC motor speed controller frequency converter, it is by changing the power supply frequency of the motor to achieve speed, speed range, energy saving, but also can slow down growth, and can be used as motor starter, but the price is relatively high.
Q:What is AC induction motor?
An induction motor and an alternating current commutator motor belong to an alternating current asynchronous motor. Induction motors are divided into single-phase asynchronous motor, AC and DC motor, and so on. We usually call induction motor as AC asynchronous motor.
Q:How to judge the quality of three-phase AC motor?
Measuring U1, U2, W1W2, V1, V2 by means of an ohmmeter is conducted. If the barrier is not good, it is better to measure the resistance of the earth with a ohmmeter
Q:How does the battery of the electric car drive the AC motor?
The electric bicycle motor is made up of three pairs of coils, but that doesn't mean an AC motor.The controller controls the speed of the motor by adjusting the pulse width.
Q:Can any AC motor 220 and 380V control positive inversion? What are the conditions?
Single phase motor has two coils, three heads, two ends of the coil and connected together to a head (public side), the starting coil of a head, a head coil operation, starting capacitor connected between the operating coil and start coil, the power supply is connected in common end and operation coil when the motor is transferred, connected to the power supply public end and start winding motor reversal.
Q:Is the motor in the inverter air conditioner a direct current motor?
The motor in the inverter air conditioner is certainly an AC motor because it is powered by frequency conversion.The so-called frequency conversion refers to the purpose of regulating speed by regulating the frequency of power supply.Since the frequency is adjustable, it indicates that the direction of the current varies periodically.Some series of AC motors can also be used as DC motors, but they are not normally used in air conditioners.
Q:For AC motors, when the voltage is constant, the frequency of the voltage becomes higher or lower, so what is the impact on the motor?.
Frequency will affect the motor speed, high frequency, motor speed, low frequency, motor speed is slow.
Q:What is the reason that the single phase AC motor is turned on and off?
Exclusive use only. Check the switch first, is there any bad contact?. After the problem of the switch is removed, the power is turned on, and whether the cold state can run normally every time. If there is a phenomenon that the cold condition can not work properly, the internal circuit or winding is not working. If the cold running is normal and the use of a period of time does not turn, and then use the hand to touch the motor whether the fever is serious, such as temperature is too high, the heat protector is broken, and so the motor can be turned cold. This phenomenon should check whether the no-load and load resistance of the motor is too large, whether or not the winding has a short turn between the two places, causing the temperature rise too high.The two capacitors on the motor, one is the starting capacitor, the other is the operating capacitor, which produces phase difference. The starting capacitor is only connected to the circuit when the motor is started, and it is disconnected when it is running normally. The operating capacitor is always connected to the circuit.
Q:Winding of single-phase AC motor?
The winding of AC single-phase unidirectional motor is composed of two sets of coils, which can be a plurality of magnetic poles (electromagnets), which can be divided into main or auxiliary parts or can be operated and started, and the two sets of coils can not be connected wrongly. AC single phase bidirectional motor of the two sets of coils, regardless of the main, deputy, or can be composed of a number of magnetic poles (electromagnets). AC three-phase motor three sets of coil parameters are same, magnetic pole number can also be more than one. The connection between the coils of a single phase three-phase motor must be in a certain order, not necessarily in series. The number of poles (electromagnets) varies according to the speed of the motor.
Q:Difference between energy consumption braking of DC motor and AC motor
Energy consumption braking of AC motor:The motor in normal operation, in order to stop quickly, not only disconnect the three-phase AC power supply, but also in the stator coil connected in the DC power supply, the DC current in the stator coil formed in the magnetic field, the rotor continues to rotate due to the inertia of cutting the magnetic field, the induced electromotive force and current formed in the rotor, the direction of rotation direction and torque motor instead, resulting in brake, the motor stops.Different torque is introduced into the rotor of the motor and different DC currents are connected in the stator of the motor, so different braking torque can be generated.Features: when the motor speed drops to zero, the braking torque will be zero, so the energy consumption braking can make the motor stop accurately

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