Siemens Original Reducer

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Q:Is the permanent magnet motor a direct current motor or an AC motor?
Because AC motors require a changing magnetic field so that the rotor can be rotated in accordance with the frequency of the alternating current, the permanent magnet can not be used in the AC motor.The magnetic field of a direct current motor can be constant, so permanent magnets can be used.
Q:What are DC and AC servo motors? What are the characteristics?
A rotating motor with input or output as direct current energy. Simulation of speed control system it is generally consists of 2 closed loop, both speed loop and current loop, which enables the two to coordinate each other, play the role of the 2 regulators in the system set up, adjust the speed and current respectively. The 2 feedback closed loop adopts the nested structure of one ring and one ring in structure, which is called double closed loop speed regulating system. It has the advantages of fast dynamic response and strong anti-interference ability, so it has been widely applied. PI or PID circuit is usually composed of analog operational amplifier, and the signal conditioning is mainly to filter and amplify the feedback signal. Considering the mathematical model of DC motor speed control system, simulation of dynamic transfer function in the debugging process simulation of speed control system, because the parameters of the motor or load the mechanical characteristics and the theoretical value is different, often require frequent replacement of R, C and other components to change the circuit parameters, dynamic performance index to obtain the expected, do it is very troublesome, if the use of programmable analog components regulator circuit, system parameters such as gain, bandwidth and circuit structure can be modified by the software, it is very convenient for debugging.
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:What does permanent magnet brushless motor and brushless DC motor mean?
The permanent magnet synchronous motor rotor adopts permanent magnet, so that the rotor magnetic field in space distribution can be divided into sinusoidal and trapezoidal wave two kinds: one is sinusoidal waveform; the other is trapezoidal wave.
Q:Comparison of AC motor and direct current motor
Disadvantages of AC motor1. the starting and regulating speed of AC motor is poorAlternating current motor can be divided into synchronous motor and asynchronous motor according to speed.
Q:How to change AC motor to generator?
Three large capacity oil immersed capacitors are added between the items, which generate voltage with the residual magnetism of the motor, but there is no good power factor
Q:AC servo motor why drive?
In addition, the servo controller does not have the ability of logic control, if need servo motor first slow turn, then turn fast, then to stop somewhere and then reverse, and so on, these signals are more responsible for the upper controller of the servo controller, such as PLC, such as motion controller.
Q:What are the similarities and differences between brushless DC motor and AC brushless motor?
Generally used in Brushless DC generator excitation, AC motor is brushless, there is also a brush, brush motor are generally small motor, because of the need to address the short-circuit current commutation time, so the exchange of brush motor is not too large, think like DC motor, DC motor there are also problems of DC motor reversing, so don't do too much! Brushless DC motor is actually an AC motor, which is usually used in the excitation system of the generator!
Q:Brushless DC motor is AC motor or DC motor, why?
That is the difference is that the brushless DC motor and AC motor rotor stator are magnetic, is only the armature, rotating magnetic field in the stator of the former is generated by the sensor and a driving circuit, an alternating current generated by the.That doesn't know much, but brushless DC motor has one advantage, that is, it has a linear characteristic of DC motor and a little better.
Q:How to distinguish AC and DC machines
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 the commutator to achieve AC-DC conversion.

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