Q:The calculation method of the weight of copper wire used for ac motor

It is often surrounded by a center, which has a high insulation layer. The cable has the characteristics of internal electricity and outer insulation.

Q:Which price is higher for ac motor and dc motor? Which service lasts longer?

Accurately, if is the same specification, should be ac motor price is low, service life is longer, through electromagnetic induction ac motor rotors, relatively save electricity, and the internal heat production is less than a dc; Dc motor, the electric motor turns the electric motor, produces heat fast, but the effect is better. Therefore, you should choose according to the requirements when using.

Q:Is it that all ac motors are bi-directional

What is the two-way communication machine.You're talking about positive and negative, usually..

Q:How does ac motor speed control

Buy the speed adjustment machine ~ 4 files ~ the external one governor ~ can be adjusted More expensive,

Q:Why should ac motors be used in parallel with capacitors

It is. The motor will not work. In order to be able to in the case of single phase can also produce a rotating magnetic field, the designers in multiple access a coil at the same time, through a capacitor on the coil, leading to join this coil phase voltage phase shift. So it's going to be a single phase in the outside and it's already going to be a double phase. The two phases produce a rotating magnetic field. The principle of connection is illustrated

Q:Permanent magnet motor is dc motor and ac motor

Because ac motor requires changing magnetic field, such ability and the frequency of the alternating current (ac) together to make the rotor rotation, so the ac motor may not use a permanent magnet. The magnetic field of dc motors can be constant, so you can use permanent magnets.

Q:Is the ac servo motor self internal speed control

For example! The panasonic servo A4 series of electric motors has coders, encoders and motor positions. I didn't open it, I should have been an encoder! The encoder output is connected to the servo drive to control accuracy! When the encoder outputs the pulse signal! The servo actuator can be powered by a single unit and can also be powered by three.

Q:How to distinguish dc motor from ac motor?

The difference between dc motor and ac motor is, of course, the type of power supply. One is dc and one is communication. The stator of a dc motor is a fixed magnetic field, and the direct current is rotating within the stator by the electric brush of the rotor forming a changing magnetic field around it. In industrial enterprises, dc motors are generally used for standby machinery or security equipment that can be reliably run because of the relative reliability of dc power sources. As the input voltage changes due to dc motor speed can also change, so need to often speed used dc motor is also many, such as trolley, electric locomotive, and so on. Ac motor is the rotational force generated by the rotating field of the stator that inducts the electric potential on the rotor. Its speed is generally fixed. But because of its simple structure and convenient power supply, it is widely used in various enterprises and families. Small to household washing machine, vacuum cleaner, big to huge pump, machine tool and so on, all use ac electric machine. Since communication is easier to obtain and easier to deliver, most of the electric machinery we use today is driven by ac motors.

Q:In the ac motor, he is excited, excited, and excited. What is the difference between

He wound, is that the rotor is a set of power supply, the stator excitation coil is another power supply, two sets of power supply is independent and not directly on the electric contact, unless the closed-loop control of the motor in general mechanical and electrical properties are hard, and is adjustable speed and torque. That features more hard!

Q:How to eliminate the electromotive force of ac motor

Motor is to understand the principle of junior high school, is a device that converts electrical energy into mechanical energy, electric coil in the magnetic field by the magnetic field of the ampere force function, makes the pivoting coil. Ampere is the power source for the rotation of the coils. If we only see the dynamic function of ampere force, the coil of the motor will continue to accelerate, this is clearly impossible, because each has a maximum speed of the motor