| Electronics > Beginners |
| Need a small induction motor |
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| chris_leyson:
I recently started work on a rotary "dancer arm" project for use as a wire tensioner as part of a small winding machine. I need to generate a known constant torque over a small operating angle, say 90 degrees. A rotary solenoid would be an easy solution but they are way too expensive so I've opted for a small 24V BLDC and a dsPICdem MCLV-2 controller, it will get me started and I don't have to waste time building a controller, that part will come later on. So far I've found some relatively cheap BLDC motors from ACT Motor in China, they also have distribution in Germany and for the sort of torque I need they don't cost much more than a small Chinese stepper. Also got a HURST DMA0204024B101 to try out, it's overkill for what I need but it has no detent torque unlike the ACT motors. Just a heads up on some kit I'm using to get me started with small BLDC motors. I went for a more expensive Microchip controller because I'm familiar with DSPics but there are cheaper controllers from ST, Texas and maybe Trinamic. |
| jmelson:
--- Quote from: Dmeads on March 15, 2019, 12:34:41 am ---I would really like to explore electric vehicles, and I want to build my own motor controller/inverter like the ones in tesla cars --- End quote --- Some nice, small motors are made by Pittman. They are quite expensive new, I got some on eBay at a good price. Mine are the 4443 series, I think. These are permanent magnet motors. You are not likely to find small 3-phase induction motors at low voltage. there are also Chinese PM brushless motors used for pumps and such things that are pretty inexpensive. These have Hall sensors so the commutation can have the correct phasing. Jon |
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