ABB High Voltage AC Motor

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Q:Causes of insulation breakdown in AC motor voltage withstand test
For various reasons, the insulation parts are weak in AC motor, and the breakdown of the weak parts of the insulation in the withstand voltage test
Q:What are the stator and rotor functions of an alternating current motor?
The role of the stator of an alternating current motor is:As part of the magnetic circuit of the motor and embedded stator windings. The stator core is laminated by 0.5mm thick silicon steel sheet, and the two sides of the brick and steel sheet are coated with insulating paint to insulate the sheets and sheets so as to reduce the core loss caused by the rotating magnetic field in the stator core. A plurality of same grooves are punched inside the stator core to be inserted into the stator winding.
Q:Can AC motors use direct current?
DC motor is also on the brush structure changing direction of manufacturing power changing magnetic field, electromagnetic force and drag on the rotor, the AC motor for AC power supply design, no directional structure, once the direct current, stator winding equivalent inductance and resistance, inductance in the DC power supply and the equivalent circuit, the resistance heating to a certain extent possible burn.
Q:How many kW or more AC Motors should be started with the starter?
In fact, the problem needs to be taken into account in 4 main elements:1, when the motor starts, the voltage on the power distribution bus at all levels meet the normal use requirements of other equipment;2 、 mechanical energy can bear the impact torque when the motor is started at full pressure.3. The structure of the motor itself can withstand the impact of full pressure starting.4 、 does the motor start with special requirements?.
Q:Who knows the main difference between DC motor and AC motor, I hope to say a little more simple, thank you
As the name suggests, the direct current motor uses DC as the power supply. AC motors use alternating current as power source.Structurally, the principle of the direct current motor is relatively simple, but the structure is complex, and it is not easy to maintain. The principle of AC motor is complex, but the structure is relatively simple, and it is easier to maintain than the direct current motor.
Q:The direction of alternating current keeps changing. How about the direction of AC motor?
The direction of rotation of the AC motor is not determined by AC + Half direction, but by the alternating current through the processing of a certain way to produce a rotating magnetic field acting on the rotor, as you hold a permanent magnet in the circle around the same compass compass as the principle of rotation make the rotor rotate, it the rotation direction depends on the direction of rotating field.
Q:How large AC contactor and thermal relay should be used for the motor of 3KW? There are steps to calculate better.
3KW motor rated current is about 6A. The bigger contactor can prolong the service life of CJX20-1210 (12A) 8-10A air thermal relay's role is to protect the motor so do not benefit too much 7-8A can protect the motor when a fault occurs.
Q:The similarities and differences between DC brushless motor and AC motor
Although the DC motor is supplied by direct current, the coil inside the rotor is still in the AC circuit. A live brush DC motor is commutated by an electric brush. And brushless motor is through the inverter circuit to DC into AC, and then to the coil. 12V cooling fans are common. It's commonly used in mainframe computers.AC motor does not need commutator (brush). Generally, permanent magnets are not needed. It would be nice to want to know more about buying a book on the principles of the motor
Q:100W AC motor or DC motor good?
Depending on what you do with the motor, each has its own characteristics,The main difference between AC and DC motors is that the nature of the power supply is different. The AC motor uses alternating current. The generator sends out alternating current, while the direct current motor uses the direct current, and the generator sends out the DC point too
Q:How many kinds of braking modes are there in AC motors? What are the characteristics of each?
Energy consumption brakingWhen the motor cuts off the AC power supply, a DC power supply is added to any two of the stator winding to generate a stationary magnetic field, and the stationary magnetic field is generated by the inertia rotation of the rotor to produce a braking torque

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