Hello I have a 220v centrifuge motor, which spins at max. of 12000 RPM. I need to make a circuit to control the speed, no problems being not accurate, simple PWM circuit. A circuit like the light dimmer circuit aith a triac or something, i know the theory but practically i do not know which parts to suite my aplication, which TRIAC and DIAC should i use.
The motor must be universal if it runs at 12000rpm.
Max speed for an induction motor is 60 x supply frequency - 3000rpm in Europe, or 3600rpm in US. That's for a 2pole machine - a 4pole is half that speed.
You need to control AC induction motors by varying the frequency of the AC signal. It needs to be rectified to DC and then inverted back to AC using a variable frequency oscillator.
The circuit you posted is a light dimmer, which controls voltage by chopping pats off the AC wave.
the circuit of my mixing AC motor burned and i need circuit diagram to this motor 220- 60hz - 600W with 6 speed pleas i need circuit like it the motor AC -braun kitchen machine k700 -
220v Motor Speed Control
Posted - May 15 2010 : 09:58:46 AM
