ABB High Voltage Induction AC Motor

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Q:What does the D axis and the Q axis mean for AC induction motors?
AC asynchronous motor is a kind of electric drive device which transforms electric energy into mechanical energy. It is mainly composed of stator, rotor and air gap between them. After the stator winding leads to the three-phase AC power supply, the rotating magnetic field is generated and the rotor is cut to obtain torque. Three phase AC asynchronous motor has many advantages, such as simple structure, reliable operation, low price, high overload capacity, convenient operation, easy installation and maintenance. It has been widely used in various fields.
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:Which is better, alternating current tubular motor and direct current tubular motor?
The alternator is concerned, it can realize the direct energy feedback to the grid (but must ensure 4 conditions: the same voltage amplitude, phase and phase sequence of the same, the same frequency); but the DC generator power is required to process the alternating current into the inverter (DC said rectifier, the DC the process that converts the AC inverter), to feedback to the grid. So it also needs to increase the power of the inverter.
Q:What's the meaning of the center height of the three-phase AC motor?
The base length represented by international letters: S - M - in short, a base seat, L - long seat, usually according to determine the length of stator core.80 of the frame as the figure "H", that is "80mm".
Q:Motor PWM how to speed?
PWM speed control principle of AC motor, mainly through the AC signal of a variable frequency modulation, a high frequency square wave driving voltage, resulting in a change with the frequency modulation signal driving current in the motor armature. Thus, the AC motor armature is driven by this current to produce a rotating magnetic field in accordance with the frequency of the modulation signal, so that the rotation speed of the motor rotor is changed. It is modulated by fm.
Q:How to distinguish AC and DC machines
This also increases the manufacturing cost of DC motors to a certain extent. The alternator is concerned, it can realize direct energy feedback to the grid (but must ensure 4 conditions: the same voltage amplitude, phase and phase sequence of the same, the same frequency); but DC generator power needs to convert AC inverter (DC rectification process called, the direct current into alternating current the process that the inverter can be feedback to the power grid). So it also needs to increase the power of the inverter.
Q:The difference between synchronous motor and asynchronous motor
Synchronous motor (synchronous motor) is an alternating current motor that generates torque by synchronous excitation of the exciting magnetic field and the rotating magnetic field of the armature.An alternating current motor with the same rotor speed as the rotating magnetic field of the stator. The rotor speed n and the magnetic pole logarithm P, the power frequency f meet n=60f/p. The speed n is decided by the power frequency f, so when the power frequency is constant, the speed is constant and has nothing to do with the load. The utility model has the advantages of high running stability and high overload capacity. Often used in multi machine synchronous transmission system, precision speed regulation, speed stabilization system and large equipment (such as rolling mills) and so on.
Q:Can any 220V AC motors be reversible?
Many single-phase motors now have only three lines. This motor is the factory, when the factory, will start winding and main winding, an end directly connected to the internal. If the motor is not modified, it can not be reversed by external means.
Q:Why are electric hair dryers divided into direct current motors and alternating current motors? What are their differences?
AC series motor electric blower is better, it is the working voltage of AC 220V, he and the electric heating wire in the circuit has no other connection, hair dryer can be cold and hot air. The DC motor is usually through a fine wire step-down rectifier drives a small motor, electric wire must work to motor work, it cannot provide separate cold, DC motor AC motor with low cost, high cost.
Q:The difference and advantage between DC motor and AC motor
DC motor:Advantages: 1., you can achieve a smooth and economical speed adjustment;2. does not require the coordination of other equipment, as long as the input or excitation voltage, current

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