ABB Original High Low Voltage AC Motor

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Brand Name:ABBModel Number:HXR 560 SeriesType:Squirrel Cage Motor
Frequency:62.2 HzOutput Power:750 KWProtect Feature:Explosion-proof
Phase:Three-phaseCertification:CEAC Voltage:690V
Place of Origin:Shanghai China (Mainland)Efficiency:IE 1Packaging Detail::EXPORT STANDAR WOODEN CASE
StructureAsynchronous MotorFunctionDriving UsageUniversal

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Q:Why don't AC motors use commutators?
Because the direct current motor changes the current direction through the commutator, the coil continues to rotateThe alternating current is always changing direction, there is no need to use the commutatorThe difference between an engine and an electric motor is that there is no power supply on the engine connected to the motor, and the motor is connected to the power supply, but it may not have no other electrical appliance
Q:AC motor - do they need constant frequency and voltage?
No they don't need as such. in fact they are actually two great methods and most commonly used speed control methods other than changing direct rotor speed and others. Formula for frequency is N=120*(f/p) here N is speed and p are number of poles.
Q:Why does the current in an AC Induction motor start to go up when the voltage is dropped off?
Because the induction motor is a constant power device. If the voltage goes down, the current goes up to maintain constant power.
Q:why is it better to use a DC motor rather than a AC motor?
on a DC motor you can control the direction fo the spinning, and on an AC motor they olny have one way of spinning.
Q:Can AC motors be converted into generators?
Another method is to replace the original rotor directly with the one or two pole permanent magnet. Note: the poles of the permanent magnet should be as close to the stator as possible, but they cannot be touched. Rotating the rotor (or permanent magnet rotor) can pass the stator around the output voltage, current. If the speed is increased, the voltage can be mentioned very high.
Q:AC Drive Dynamic braking resistors?
The resistors act as a load to absorb the power from an AC motor that is acting as a generator. Assume that the frequency of the power applied to an AC motor is reduced at a rate that requires the motor speed to decrease at a faster rate than it would slow down if power were to be removed. In order to force the load to turn at the slower speed demanded by the frequency reduction, the motor produces negative torque, torque that is applied as a braking force rather than a driving force. During braking, the load is driving the motor and the motor acts as a generator. The motor produces a voltage that exceeds the voltage produced by the AC drive. That voltage would tend to charge the capacitors in the drive to an excessive voltage. Circuitry in the drive detects the voltage increase and/or the current reversal and connects braking resistors to draw a compensating current and dissipate the energy produced by the motor.
Q:Why is DC used to run equipment and not AC?
we can but we don't want, it may cause instability and unwanted performance. for example if a chip needs source voltage 5 volt and it is ac then in some voltages (if it is AC) it won't work cause it goes from -5 to 5 with a stanadar frequency but you need all the time 5V. Also the behaviour of the inductors and the capacitors will be uncertain. But the reason that the AC is used in the jack is that it's transported more easily in big distances in unlike the DC
Q:Dodge Magnum Owners: Do you guys notice the loud AC motor? It is driving me nuts!?
There is no AC motor on any car, What the heck are you talking about? that's why you received no answer! You don't even say what year it is, Are you talking about A/C System? The compressor? I advise that you rephrase your question
Q:Why is the rotor of an AC motor neither magnetic nor can it rotate?
The DC motor and AC synchronous motor works as follows: the stator or rotor produces a rotating magnetic field, while the secondary winding forms polarity. Since the two poles of the stator and rotor are attracted or repelled by each other, the rotation is generated.
Q:what is the size of the AC SR Conductor at 11 KV for 150 HP motors at ambient temparature of 45 deg C max?
150 HP motors has a full load current of 180 amperes at 460 Volts. This is 7 plus amperes at 11 kv. Cm = 1.732(22)8(3,000)(3.28)/.03*11000 Cir Mils =9984 You will need a 1/0 ACSR as supply conductor.

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