ABB High Voltage AC Motor

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Q:How can I change the alternating current welding machine into a DC welder?
This is: ZXG series silicon rectifier (dead silicon) arc welding machine, AC arc welding machine itself power factor is lower, plus rectifier loss will be lower. The power consumption is too large and uneconomical. It has belonged to the sort of our welder.
Q:Is the single-phase carbon brush motor a direct current motor or an AC motor?
(1) motor is a DC motor with single-phase brushless motor or AC, there is also some DC motor AC and DC motor, such as most of the pistol electric drill AC and DC motor, AC and DC power can also be used to use.(2) the power supply of rectifier bridge is not from positive and negative pole, and the power supply of rectifier bridge must have positive and negative poles, otherwise it is not power supply of rectifier bridge.(3) bidirectional thyristor should be used in AC circuit. If your motor speed is bidirectional thyristor, it may be AC and DC motor.DC motor carbon brush and AC motor carbon brush is the same, so there are AC and DC dual series motor.
Q:Panasonic servo motor A4 series, AC synchronous motor or AC asynchronous motor?
Induction motors are also called induction motors. The electromagnetic fields on the rotor are induced by the stator magnetic field. The rotor of the synchronous motor must have its own magnetic field. The speed of the asynchronous motor varies slightly with the load, and this speed is lower than the speed of the stator magnetic field, so it is called asynchronous motor. The speed of the synchronous motor is strictly rotating according to the magnetic field speed of the stator, so it is called synchronous motor. Asynchronous motors can be activated directly. The synchronous motor needs a special starting device or starting winding, so the manufacturing process is complex and the cost is high. Asynchronous motors are generally used as motors. Synchronous motors are generally used as generators and as compensation machines.The first point is that asynchronous motors are for motors only, and are rarely used as generators. Synchronous motors are used to generate electricity. The principle of asynchronous motor is mainly in the stator through the 3 cross flow, so that it produces a rotating magnetic field, the speed is N0, that is synchronous speed. Different poles of the logarithm P, at the same frequency of f=50Hz alternating current, will produce different N0, n0=60f/p. The working principle is as follows: 3 phase symmetrical windings symmetrical 3 phase current to produce a rotating magnetic field, the magnetic field line cutting rotor windings, according to the principle of electromagnetic induction, the production of E and I in the rotor winding, rotor winding by electromagnetic force in a magnetic field, the electromagnetic torque, the rotor rotation, the rotor output mechanical energy. Driven by mechanical load rotation.
Q:Which is better, alternating current tubular motor and direct current tubular motor?
The advantages of DC motors (compared with AC motors) are: to achieve economic, smooth speed characteristics. And AC motor need to use inverter, electromagnetic regulator and other components to achieve this function.With the same power, the same speed (must be the same speed) compared with DC motor and AC motor, DC motor of the expensive price point, mainly because of its complicated structure must have "commutator" to achieve AC-DC conversion. This also increases the manufacturing cost of DC motors to a certain extent.
Q:The difference between three-phase AC synchronous motor and three-phase AC asynchronous motor
Synchronous machines are mostly used in large generators, while induction motors are almost exclusively used in motorsSynchronous motor can be flexibly adjusted by excitation power factor; power factor of asynchronous motor is not adjustable, so in some large factories, induction motor is applied more, can add a synchronous motor with adjustable camera, used to regulate power factor and power factory interface. However, due to the synchronous motor with high cost and maintenance workload now, generally by the capacitance compensation of the power factor.Because synchronous machine excitation winding and slip rings, the operator needs to have a higher level of excitation control, in addition, maintenance free and asynchronous machine, maintenance workload is bigger; so, as a motor, now mostly choose the asynchronous motor.
Q:What's the difference between an AC motor and a direct current motor?
The difference between AC motor with DC motor is simple and there is no difference between the brush DC motor, AC motor and the brush is no, one more than the DC inverter, DC motor brush, low noise, energy saving. The AC motor because of the frequency converter noise is relatively large, power consumption is also slightly larger. In short, each has its own advantages, according to their own use of ways to solve which to use!
Q:What is the size of DC motor and AC motor under the same power?
In general, the DC motor is large in size, but it depends on whether the supply voltage of the two motor is the same.
Q:Motor starting mode
Y, reduced voltage startMotor stator winding for delta connection, start with Y, close to the speed of the rated speed to the operation, the startup, reduce the stator winding of each phase to 58% power supply voltage, the starting current is directly at the start of 33%, the starting torque directly at the start of 33. A small startup current, start torque is small.The advantages of Y step-down start is not required to add boot device, a start switch or AC contactor control equipment can be achieved, the drawback is only used for delta connected motor, asynchronous motor can not load start.
Q:What is the principle of the single-phase AC motor in the washing machine?
The motor of the washing machine should be called: capacitance type single-phase asynchronous motor. The principle is a series capacitor in the amount of the starting winding, the voltage and current of capacitor lags behind its 90 degree, it will produce a magnetic field in the stator, the motor rotation!
Q:Is the permanent magnet synchronous linear motor AC motor or direct current motor?
Permanent magnet synchronous motor (PMSM) is usually referred to as brushless DC motor with back electromotive force, trapezoidal wave and armature current as square wave. The back electromotive force and armature current are both sine waves, which are called permanent magnet synchronous motors.

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