Is the servo motor alternator? What's the difference?
The servo motor has dc and communication. The typical difference is: The wiring of ac servo motor is a three-phase power line, and the encoder feedback line. Ac servo motor is no carbon brush, dc servo motor has carbon brush. To see whether it's communication or dc motors, it's simple: Look at the number, if it seems AC is communicating, DC is DC. Also, according to the power source, the communication is a three-compartment power line.
The servo motor has dc and communication. The typical difference is that the wiring of the ac servo motor is the three-phase power line, and the encoder feedback line.
Ac servo motor is no carbon brush, dc servo motor has carbon brush. This is the most obvious feature.
Of course is ac motor, it is a kind of ac synchronous motor, dc motor is the dc power supply, the communication is usually UVW 3 phase, the mark of liking change is known
Ac servo is better, because it is the sine wave control, the torque ripple is small. Dc servo is a trapezoidal wave. But dc servo is simpler and cheaper. Ac servo technology itself is the reference and application of frequency conversion technology, on the basis of the dc motor servo control imitation of dc motor by PWM variable frequency control mode, that is to say, ac servo motor must have frequency conversion of this link: frequency conversion power frequency is 50, 60 hz ac rectifier to dc first, and then through a control gate of the transistor (IGBT, IGCT, etc.) through the carrier frequency and PWM control inverter for adjustable frequency waveform is similar to the cosine of pulse power, because the frequency is adjustable, so the speed of ac motor is adjustable (n = 60 f/p, n speed, frequency, f p a logarithmic)
