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| controlling an HVAC motor with mains pulses ? |
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| kripton2035:
Hi folks, I made some module to control the speed of an HVAC motor (which must be an induction asynchronous one ?) I tried to speed control it using a variable phase triac method and this doesn't work (very little 10° where you can change speed from zero to max) so I tried to control it's speed using a pulse train of 50Hz 230V. I detect the zero cross of the mains, then send 1 to 10 pulses of 230v 50hz with a triac it's been made with an esp8266 using arduino IDE. it's working as the speed of the motor can be controlled from 0 to 100% in a 10% increment. but I have some concerns. 1/ the motor is making some inhabitual noises, is there a way to reduce them ? 2/ isn't it dangerous for the motor life span ? thanks for any hint(s) on the subject. |
| kripton2035:
this kind oh hvac motor |
| kripton2035:
nobody ? :( |
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