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

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

Q:What is the control speed for ac servo motors?

It is estimated that you should use an external pulse control servo driver, and you can control the speed of the servo motor by controlling the frequency of the servo drive pulse. Japanese general maximum speed corresponding to the pulse frequency of 500 k by the proportion relation, you change your pulse output frequency of the controller, to control the speed of the servo motor.

Q:Why is a single phase ac motor that can be adjusted by voltage

In simple terms, if the voltage is reduced and the rotor spins at the same speed, the stator gets a small current. Electromagnetic torque is reduced, in under the action of load torque, the same slip increase led to the decrease of the rotational speed, speed fall in reflection impedance decreases, and according to the size form again low impedance of the rotational speed of voltage and current of balance, and maintain at a low speed.

Q:Brushless dc motor, is it ac motor or dc motor? Why is that?

Dc motor, only without brush and commutator, should be inside by hall sensor to detect the rotor position, make the drive circuit commutation, turn in one direction of motor

Q:Is the squirrel-cage motor communicating in three phases?

The rodent motor can only show that his rotor is a mouselike, although it is an alternating current, but it does not indicate that it is a three-phase alternating current, or single phase alternating current. This depends on the winding and wiring of the stator winding of the motor. The three-phase motor is composed of three-phase winding, which usually leads to six terminals, delta connection and star connection. The individual also has a three lines after the inside of the line. A single phase motor is composed of two phase winding, which is divided between the main and the radial winding. The combination of the external capacitance and the radial winding is used to generate the rotating field. An electric motor is also a single phase, typically consisting of a winding, which relies on a short circuit ring on a pole shoe to form a rotating magnetic field. Be sure to distinguish between the use and the other

Q:Can two phase ac motor not be able to install governor?

Small power can, high power (with centrifugal switch) not ok.A resistance governor can be installed

Q:The difference between dc motor and ac motor

Ac motor is only the stator winding and rotor cage shape is commonly, when during a stator winding in three-phase alternating current (ac), to produce a rotating magnetic field, rotor cutting lines of magnetic force movement, the induced electromotive force and induced magnetic fields, are produced by the interaction of two magnetic field drive motor rotation. Dc motors have two windings, a stator winding, a rotor winding, the stator zhongtong with direct current, a fixed magnetic field generated, passing a current in the rotor is, based on the function of electric conductor in magnetic field by force, and the effect of the rotor after electrify force, so that it rolls up, adjust the size of the current in the rotor, can change the speed of the motor, dc motor speed smooth, can realize stepless speed regulation. Now frequency conversion technology is mature, so use more and more frequency control of motor speed, dc motor without the answer

Q:Is the mainstream subway car traction motor, ac or dc?

Big trend is ac traction motor, a few big metro vehicle control system manufacturers (bombardier, Siemens and alstom, modern - rotem, etc.) are in the production of communication control technology products, traction motor of metro vehicle use dc has been rarely, in addition to Beijing line 1 metro vehicle with dc motor, the current of the metro vehicle use is ac motor, the power supply is a dc power supply.

Q:Can alternator speed improve power generation?

You can increase the excitation current, and if it's permanent magnet you can't do it unless you have a stronger magnet.

Q:What is dc and ac servo motor?? What are the features?

There is no brush and commutator, so the work is reliable and requires low maintenance and maintenance. It is convenient to heat the heat of the stator winding. The inertia is small and easy to improve the speed of the system. It is adapted to the high speed torque. There is a smaller volume and weight under the same power.