How to draw 220V motor
Posted 19 March 2012 - 01:03 PM
Posted 19 March 2012 - 09:05 PM
Posted 28 March 2012 - 08:32 PM
Posted 29 March 2012 - 12:43 AM
Posted 30 March 2012 - 12:34 AM
Rookie, exactly what do you want to do with the 220V (AC I presume) 100W motors? Control their cycle time or speed? Cycle time can be done with triacs (for a reasonable duty cycle period like on for 10 seconds off for 10 seconds) but if you want speed? Now that's more difficult. Magpie hit it on the head that if you want to control the speed of the motors. PWM is all about effective energy delivered to a load. Using PWM with AC (50/60HZ) just doesn't compute. You need DC motors to work with PWM - on vs off time.
A solar system, I would think, doesn't need milisecond or even second control. If I were you I would think about a NUCH hegher repetition rate line MINUTES control of the pumps. Simple monitoring works then.
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