ABB AC Motor Low Voltage QABP Series

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Q:How does the battery of the electric car drive the AC motor?
Need to correct it, electric motor is a brushless DC motor drive principle is relatively simple, with the ordinary two wheeled vehicle as an example, the motor outer rotor, is the rare earth permanent magnet, internal stator coil winding is energized, the electromagnetic coil is to produce magnetic force, when a specific set of coils to the rotor magnet, through the Holzer tube (magnetron) controller, to the coils to generate magnetic force (magnetic field and rotor at the same level of) to generate thrust, push the rotor to rotate an angle when rotating the coil after repeated the line behind the winding ring and controller action,
Q:Does the DC motor work the same as the AC motor?
AC motor without carbon brush and commutator, maintenance free, strong and wide application, but the characteristics to achieve performance equivalent to DC motor to be used to achieve complex control technology. AC motor is divided into two categories: asynchronous motor and synchronous motor. Asynchronous motor is divided into single-phase asynchronous motor, two-phase asynchronous motor and three-phase asynchronous motor according to the number of stator phases. The three-phase asynchronous motor is simple in structure, reliable in operation and low in cost.
Q:What are the speed regulating methods of AC motors? Detailed point
(1) rotor circuit series resistance: used in AC winding asynchronous motors. The range of speed regulation is small, the resistance consumes power, and the motor efficiency is low. Used of cranes.(2) change the speed of power supply voltage, the speed range is small, the torque decreases greatly with the voltage drop, and the three-phase motor is usually not used. Used for single-phase motor speed regulation, such as fan.(3) cascade speed regulation, in essence, is the introduction of additional rotor electromotive force, change its size to speed. It is also only used in wound motors, but the efficiency is improved.(4) electromagnetic speed regulation. Used only for slip motors. By changing the exciting coil current, stepless smooth speed regulation, the mechanism is simple, but the control power is smaller. Not suitable for long term low speed operation.
Q:What are the speed regulating methods of AC motors? What are the characteristics of each?
Winding motor rotor series resistance speed control method: line induction motor rotor series of additional resistance, so that the motor slip increases, the motor at a lower speed operation. The greater the resistance in series, the lower the speed of the motor. This method is simple in equipment and convenient in control, but the differential power is consumed in the form of heating. The utility model belongs to a class speed regulation, and the mechanical characteristics are softer.
Q:When the AC motor is burnt out, is the stator burnt out or the rotor? What about DC motors?
It is a mechanical device used to realize the conversion of mechanical energy and alternating current energy. AC motor has become the most common motor because of the great development of AC power system. 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. The coverage of AC motor power greatly, from a few watts to several 101000 watts, even millions of kilowatts.
Q:Why is an AC motor more popular than a direct current motor? System description, thank you.
When it comes to AC motor, said first alternating current, alternating current is often used in our daily life, low price, wide use, AC Alternating Current AC motor can adapt to any electrical equipment, is no exception, the reason is the three-phase alternating current of each phase is 120 degrees, 360 degrees, this is just a three-phase AC motor is welcome to good, so the AC motor will be popularized
Q:DC motor speed control performance is very good, why do we need AC motor?
Because the DC motor needs a set of high-power DC power supply, the AC motor doesn't need it.
Q:How to distinguish AC and DC machines
The main difference between AC and DC motor is the power properties of different AC motors using AC generator, the AC and DC motor; using direct current, the generator is DC. Advantages of DC motor (AC motor and more): smooth speed control characteristics, can achieve economic. And AC motor need to use inverter, electromagnetic regulator and other components to achieve this function.
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:Why does the AC motor turn?Do I feel that the coil is not in a steady state?
When three to three alternating current in the stator winding through the symmetry, it produced a synchronous speed n1 along the stator and rotor roundfor space in a clockwise rotation of the rotating magnetic field. Due to the rotation speed of rotating magnetic field to N1, the beginning of the rotor conductors is static, so the rotor conductor will cut the stator rotation the magnetic field induced electromotive force (EMF direction dingze judge with the right hand).

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