Q:why ac superconducting motors are common and not dc?

A direct current (dc) motor is nothing more than an alternating current (ac) motor with a commutator. It is far more efficient to electronically convert dc to ac to drive an ac motor than to use a dc motor for high power applications. - An old electric power engineer.

Q:not asking for a inverter

Err, no, it's not all electricity - there are lots of different types of electricity - or perhaps I should say electrical currents, to be more precise. You have probably heard of the abbreviations A.C. and D.C. used in connection with electricity. They stand for alternating current and direct current. The former changes its flow direction at a rate of between 50 and 60 times per second (depending where you live in the world). The latter always sends the current 'one way' That's why you cannot run A.C. only devices from a D.C source. Moreover, trying to do it is highly likely to damage the device (at best); cause a serious fire (at worst) plus the possibility of an electrical shock, if the insulation fails due to the excessive heat being generated within the device. .

Q:what is the difference between ac servo sewing machine motor and dc servo sewing machine motor?

One requires alternating current to run, and the other requires direct current. Choose the one that fits with the power supply feeding the motor.

Q:What is AC motor?

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. In the early 1980s, the largest turbo generator reached 1 million 500 thousand kilowatts.AC motors are usually divided into AC generators, AC motors and synchronous regulators according to their functions. Due to the reversibility of the working state of the motor (see the motor), the same motor can be used as a generator and an electric motor. It is not very precise to divide the motor into generator and motor, but some motors are mainly used as generator, some motors are mainly motor operated.

Q:The difference between synchronous motor and asynchronous motor

Induction motor, also known as asynchronous motor, that is, the rotor in rotating magnetic field, in the rotating magnetic field under the action of a moment of rotation, and thus rotor rotation. The rotor is a rotatable conductor, usually in the shape of a mouse cage. Invented by Nicola Tesla, an electrical engineer in 1887.The induction motor is also called asynchronous motor, that is, the rotor is placed in a rotating magnetic field, and a rotational torque is obtained under the action of the rotating magnetic field, so that the rotor rotates.

Q:I know it has something to do with the capacitor and a less than 180 degree phase shift. But thats all I know.

Single Phase Motor Reversing

Q:I want to buy a 55 kw AC electric motor. Now 55 kw = about 75 hp.On ebay i see AC motors for sale that say .55 kw. Is this the same? If not how many horsepower is this?

that is 100 times smaller motor than what you have in mind. 1HP=746W=0.746kW 0.55kW is about 3/4 HP

Q:I am new to all this. BUt I've read about an quot;h bridgequot;? if you could just point me towards those 2 things It would really be helpful. Trying to shop without knowing what to look for is rather difficult.If you need more info, then could we just assume that I am trying to run a DC drill motor, and the AC one can be anything really, just to get started, as I'm not sure what appliances it would run yet.The goal is just to hook up the arduino uno for use of larger things.... THANKS A MILLION!!!

An okorder /

Q:Is it an universal motor which works on ac or dc voltage,how does it work,speed regulation rheostat foot pedal,I mean can someone explain me technically how a sewing machine motor works,and how to connect it back after rewinding,thank you.

dear sir, how can we check is it univeral (ac, dc ) motor, please explain. thanking you

Q:I have AC motor with star/triangle that blow the fuse after 30 seconds it started

start windings are remaining energized.