ABB AC Motor High Voltage HXR400

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Brand Name:ABBModel Number:HXR 400 SeriesType:Squirre Cage Motor
Frequency:50.2 HzOutput Power:350 KWProtect Feature:Explosion-proof
Phase:Three-phaseCertification:CEAC Voltage:690V
Place of Origin:Shanghai China (Mainland)Efficiency:IE 1Packaging Detail::EXPORT STANDAR WOODEN CASE
StructureAsynchronous MotorFunctionDriving UsageUniversal

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Q:What's the difference between an AC motor and a direct current motor?
1. national standards: DC motor life 2000 hours2. DC motor carbon brush service life 500 hours, need to change once3., the continuous use of DC motor will lead to carbon dioxide heating, carbon deposition, easy leakage4. DC motor continuous use time is too long, will lead to: A. produce big current, motor burning, and even burn the power board; B. easy to produce over-current protection, automatic stop
Q:What is the size of DC motor and AC motor under the same power?
The first is to determine the output power or the rated power consumption..The DC motor has low working voltage and large power consumption under the same power consumption.The AC motor has a high working voltage and a small volume under the same power consumption.If the same work force and torque are required, the DC motor is of small size.
Q:Is servo motor AC motor? What's the difference? How can I tell whether it is AC or DC?
AC servo better, because it is sine wave control, torque ripple small. DC servo is trapezoidal wave. But DC servo is relatively simple and cheap. AC servo technology itself is the reference and application of frequency conversion technology, control by frequency PWM based on DC motor servo control on imitate DC motor to achieve, that is to say this part of the AC servo motor must have frequency: frequency is the frequency of 50 60HZ AC first rectified into DC, and then through the door of the control transistors (IGBT, IGCT) whose frequency can be adjusted by electric pulse carrier frequency and PWM control inverter waveform similar to Yu Zheng cosine, because the frequency is adjustable, so the AC motor speed can be adjusted (n=60f/p, n speed, f frequency, P polar log)
Q:Where are the low voltage AC asynchronous motors used in electric machines?
Low voltage AC asynchronous motors commonly used in industrial electrical equipment are typically three-phase asynchronous motors.Three phase asynchronous motor can be used to drive all kinds of general machinery and equipment, such as compressors, pumps, fans, mixers, crushers, cutting machines, conveying machinery and other mechanical equipment, etc.. In the mining, machinery, metallurgy, petroleum, chemical, power plants and other industrial and mining enterprises as prime movers.
Q:Why can single-phase AC motors be controlled by voltage?
The principle that single-phase AC motor can be controlled by voltage is:1, synchronous motor torque = motor power / (2 * pi * speed /60) N = M.2, alternating current frequency is 50Hz, synthesis magnetic field synchronous speed is 50r/s, namely 3000r/min, if the electric motor more than one pair of magnetic poles, further analysis can also get synchronous speed.3, 4 pole synchronous speed is 1500r/min, 6 pole synchronous speed is 1000r/min, 8 pole synchronous speed is 750r/min.4, asynchronous motor speed = (60* frequency / pole count) * slip.5, the synchronous motor stator voltage reduction, according to the first, the motor torque drop, the motor is asynchronous, accord with the fourth formula, the slip is less than 1, the motor speed decline.6, if the motor torque and external resistance torque balance, the slip rate is also stabilized, the speed stabilized, the motor speed down success.After 7 and fifth, sixth, the stator voltage of the motor is increased, and the process is reversed. So realize voltage speed regulation.
Q:AC motor speed regulator
The other is called magnetic transmission, and the cost performance is similar to that of the converter. But the principle is different. It is characterized by long life and little maintenance. It has been applied in the speed regulation of large motors. AC motor speed controller is simple and can be used for limiting the buck, governor as the electric fan, the speed control method is simple, but the load characteristics of the motor is very poor, only suitable for small motor load and stable situation.
Q:Which motor has a great torque when the motor is under DC at the same power?
After the launch, the output power of squirrel cage AC motor and slip directly related, so when the load changes, the AC motor speed will change correspondingly, and the output power of DC motor and armature current, so the external characteristics generally than external characteristics of ordinary AC motor flat hard.
Q:The similarities and differences between DC brushless motor and AC motor
Although the DC motor is supplied by direct current, the coil inside the rotor is still in the AC circuit. A live brush DC motor is commutated by an electric brush. And brushless motor is through the inverter circuit to DC into AC, and then to the coil. 12V cooling fans are common. It's commonly used in mainframe computers.AC motor does not need commutator (brush). Generally, permanent magnets are not needed. It would be nice to want to know more about buying a book on the principles of the motor
Q:Why is DC motor speed regulating better than AC?
The magnetic flux can remain the same when the excitation voltage is constant at the time of DC speed regulation.
Q:What's the difference between a variable frequency motor and a servo motor?
Then it is servo motor, variable frequency motor and the main difference with the encoder, and then transmitted to the servo motor drive, and then using the control theory, such as gain, adjust time, simply say a servo motor is a closed-loop control system, and quick start, stop, load capacity a variable frequency motor, with these characteristics, also makes the speed, torque, third position control method for high requirement application. 1, servo motor and inverter and working principle of AC motor is basically the same, belong to the AC-DC-AC voltage type motor drive, but the technical requirements of big differences, so there are great differences in the aspects of motor and driver design.

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