Is servo motor AC motor? What's the difference? How can I tell whether it is AC or DC?
AC motor, of course, is an AC synchronous motor, DC motor is DC power exchange, the general is UVW three-phase, see the change of the mark will know
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)
Want to see is AC or DC motor, is very simple:Look at numbers. If AC seems to be communicating, DC is dc.Also according to the power line view, AC is the three car power cord.
The typical difference is that:AC servo motor wiring is three-phase power line, as well as encoder feedback line.AC servo motor is without carbon brush, DC servo motor has carbon brush.
