ABB High Voltage AC Motor

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Q:What's the function of carbon brushes for AC motors?
AC motor brush: brush effect can be used for DC motor or AC motor commutator or slip ring, as sliding contact body import and export current, its thermal conductivity, and good lubrication performance, and has certain mechanical strength and direction of the spark of instinct. Almost all motors use carbon brush, which is an important component of the motor
Q:What are the differences between AC motors and DC motors?
(1) the same structure, alternating current generator and DC motor structure are composed of stator, rotor, iron core, coil, magnetic pole, brush and so on.(2) the same electromagnetic applications are the applications of electro magnetic and magneto electric phenomena.(3) using the same conversion asynchronous motor, as long as the prime mover (such as turbine, diesel engine etc.) drag, rotor speed is n higher than the rotating magnetic field N1 synchronous speed, slip even if S= is negative, coupled with the exciting current, turned into AC asynchronous generator; DC motor, if the power part it changes the rotation for external power, armature winding and excitation winding end it on a DC voltage, the DC motor can also be used as a DC generator.(4) operation and maintenance are required to check the operation of the same operation, sound and vibration is normal, the ventilation is good, the bearing lubricating oil is sufficient, the stator windings and the temperature of each part is normal, there is no abnormal rotor brush spark voltage and current is in the rated range, chassis grounding or zero is good.
Q:Is the permanent magnet motor a direct current motor or an AC motor?
Permanent magnet motor is DC motor, AC motor can also be (such as household; similarly, no breeze ceiling fan) can be a permanent magnet DC motor, AC motor can also be, even AC / dc.
Q:What's the UVW representative of the motor, please?
Three phase alternating current is a form of transportation of electrical energy, referred to as three-phase electricity. Three phase AC power supply is composed of three alternating current potential with the same frequency, equal amplitude and phase difference of 120 degrees. There are many uses of three-phase alternating current. Most of the AC power equipments in industry, such as motors, adopt three-phase alternating current, which is often referred to as the three-phase four wire system. In daily life, the use of single-phase power supply, also known as lighting electricity. When the lighting power supply, use three-phase electricity one relative to supply electrical equipment, such as household appliances, while the other one is the line of three-phase four wire fourth wire, which is the zero line and the zero line drawn from the neutral point of the three-phase power.
Q:Working principle of AC motor
Therefore, as long as the electromagnetic force direction, the motor will rotate continuously. This is the application of AC motor. The AC motor consists of stator and rotor, you said in the model, the stator is electromagnet, rotor stator and rotor coil is. While using the same power source, so the current in the stator and rotor the direction of change is always synchronized, i.e. the current direction in the coil is changed, and the direction of the current in the electromagnet, according to the left-hand rule coil magnetic force direction, coil can continue to turn down.
Q:Is household sewing machine good for AC motor or direct current motor?
DC motor is good, because the DC motor speed up fast and stable.
Q:AC motor speed regulator
AC motor is the most ideal speed control mode of frequency conversion, and other ways are electromagnetic speed regulation, variable pole speed regulation, variable pressure speed regulation.
Q:Why is DC motor speed regulating better than AC?
The magnetic flux can remain the same when the excitation voltage is constant at the time of DC speed regulation.
Q:Why is DC motor wider than AC motor? High speed regulation accuracy? How do you know?
And AC motor plus inverter (AC motor itself can not speed), if the stepless speed regulation, its torque is changed with the speed of the motor changes, generally when less than 30HZ when the operation is unstable. So, DC is wider than AC speed regulation.
Q:What are the similarities and differences between brushless DC motor and AC brushless motor?
Generally used in Brushless DC generator excitation, AC motor is brushless, there is also a brush, brush motor are generally small motor, because of the need to address the short-circuit current commutation time, so the exchange of brush motor is not too large, think like DC motor, DC motor there are also problems of DC motor reversing, so don't do too much! Brushless DC motor is actually an AC motor, which is usually used in the excitation system of the generator!

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