jammy420
Galvanizer
I recently had to replace my motor in my air cooler. I decided to buy a BLDC motor. All seems to work fine. Motor is running. Oscillation, water pump all works fine. However, I am unable to fix the speed controller part. I am attaching my existing speed control design and what my new motor guy forwarded. Let me know what should I do.
Also my additional findings. There was a 5 core wire running to my old motor. (If further explanations are required , let me know)
Blue color - Phase. it is connected to my new motor phase
I see the following observations when I connect my new motor's neutral to the other colors. Totally there are 3 speed settings , 1,2,3 . 3 is highest
Red wire - runs in speed 1 setting, switches off in other speed settings
Yellow wire - runs in speed 3 setting, but slow. switches off in other speed settings
black wire - runs in full speed at speed 3. switches off in other speed settings
white wire - doesn't run at all. but it gives a small motion initially and stops.
My existing Crompton Desert cooler 88L : https://www.flipkart.com/crompton-88-l-desert-air-cooler-honeycomb-cooling-pad/p/itm295301ffdc909
below is my conversation with the new motor guy which also has the design of speed control he suggested
update: AI said to buy a new controller.... BLDC motors don’t use multi-tap windings for speed control. They require a controller that adjusts the voltage or uses Pulse Width Modulation (PWM) to vary speed. Your old regulator, designed for an AC motor with tapped windings, isn’t compatible with the BLDC motor’s requirements.
Also my additional findings. There was a 5 core wire running to my old motor. (If further explanations are required , let me know)
Blue color - Phase. it is connected to my new motor phase
I see the following observations when I connect my new motor's neutral to the other colors. Totally there are 3 speed settings , 1,2,3 . 3 is highest
Red wire - runs in speed 1 setting, switches off in other speed settings
Yellow wire - runs in speed 3 setting, but slow. switches off in other speed settings
black wire - runs in full speed at speed 3. switches off in other speed settings
white wire - doesn't run at all. but it gives a small motion initially and stops.
My existing Crompton Desert cooler 88L : https://www.flipkart.com/crompton-88-l-desert-air-cooler-honeycomb-cooling-pad/p/itm295301ffdc909
below is my conversation with the new motor guy which also has the design of speed control he suggested
update: AI said to buy a new controller.... BLDC motors don’t use multi-tap windings for speed control. They require a controller that adjusts the voltage or uses Pulse Width Modulation (PWM) to vary speed. Your old regulator, designed for an AC motor with tapped windings, isn’t compatible with the BLDC motor’s requirements.
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