ABB High Voltage AC Motor

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Q:AC servo motors generally choose synchronous or asynchronous?
This will be based on your purpose, such as CNC machine tools feed shaft, generally use AC synchronous servo motor, spindle general use AC asynchronous motor. The synchronous machine of the same power is more expensive than the asynchronous machine
Q:How do I know whether the motor is a direct current motor or an AC motor?
Look at the nameplate, such as AC 220, V is AC motor, DC 220 V is DC motor!
Q:Panasonic servo motor A4 series, AC synchronous motor or AC asynchronous motor?
The servo motor can make the control speed and position accuracy very accurate, and the voltage signal can be converted into torque and speed to drive the control object. The servo motor rotor speed control by the input signal, and can respond quickly, in the automatic control system, used as actuators, and electromechanical time constant, high linearity, initiating voltage characteristics, to convert signals received from the motor shaft angular displacement or angular velocity output. Divided into DC and AC servo motor two major categories, the main feature is that when the signal voltage is zero, no rotation phenomenon, the speed increases with the torque and uniform decline.
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:What is the reason that the single phase AC motor is turned on and off?
Check the switch first, is there any bad contact?. After the problem of the switch is removed, the power is turned on, and whether the cold state can run normally every time. If there is a phenomenon that the cold condition can not work properly, the internal circuit or winding is not working.A single-phase alternating current motor is a rotating electromagnetic machine used to realize the conversion of electrical energy and mechanical energy.
Q:How large AC contactor and thermal relay should be used for the motor of 3KW? There are steps to calculate better.
1, Y-100L-4 type 3KW motor rated current is 6.4A, can also be obtained by formula: (power factor cos Phi about 0.7)I = P/ (root 3 * U * cos (3000/) = 1.732 x 380 x 0.7) = 6.5 (A)2 "AC contactor selection: general and motor current is available, but in actual use, the contact is easy to burn, choose more than the motor current double the more durable, should choose CJX2-1210 (12A).".3 "thermal relay setting current: choose regulating current range of 5 ~ 9A thermal relay, the setting current is 1.1 times the rated current of the motor (7A).
Q:Please exchange the motor. Is it possible to adjust the speed with a governor?
At present, the most preferential speed regulation mode is frequency converter with the best performance, while the output torque is constant at low speed.
Q:How is the rated current of three-phase AC motor calculated?
I=S/1.73UX0.8 is: apparent power divided by the square root of 3, 1.73, and then divided by the voltage X power factor 0.8
Q:Why are electric hair dryers divided into direct current motors and alternating current motors? What are their differences?
AC motor: wind, make the sound small, more durable, hot and cold big difference, large volume, stable current to prevent overvoltage protection AC fever dead machine, most hair dryer is now all communication, have built-in motor protection diode
Q:Why do motors need capacitance when they start?
Only for single-phase AC motors, the rotating magnetic field is formed by the phase-shifting of the capacitor because a single winding can not form a rotating magnetic fieldA three-phase magnetic field is not needed, so a rotating magnetic field can be synthesizedHenryzheng2 | published on 2013-02-17 17:21

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