| Electronics > Beginners |
| Need a small induction motor |
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| Benta:
--- Quote from: Simon on March 15, 2019, 08:08:42 pm ---brushless permanent magnet motors may not be a favourite either as if they loose sync it will be complicated to get things going again. --- End quote --- I believe you are speaking about sensorless drive here. PMDC motors with Hall sensors are as uncomplicated as brushed DC motors. |
| Simon:
--- Quote from: Benta on March 15, 2019, 08:29:17 pm --- --- Quote from: Simon on March 15, 2019, 08:08:42 pm ---brushless permanent magnet motors may not be a favourite either as if they loose sync it will be complicated to get things going again. --- End quote --- I believe you are speaking about sensorless drive here. PMDC motors with Hall sensors are as uncomplicated as brushed DC motors. --- End quote --- Yes i expect a sensored motor would be less of a problem for the safety critical operation. |
| Benta:
--- Quote from: Simon on March 15, 2019, 08:31:24 pm --- --- Quote from: Benta on March 15, 2019, 08:29:17 pm --- --- Quote from: Simon on March 15, 2019, 08:08:42 pm ---brushless permanent magnet motors may not be a favourite either as if they loose sync it will be complicated to get things going again. --- End quote --- I believe you are speaking about sensorless drive here. PMDC motors with Hall sensors are as uncomplicated as brushed DC motors. --- End quote --- Yes i expect a sensored motor would be less of a problem for the safety critical operation. --- End quote --- Sensorless PMDC drive has a very limited number of applications, Hall-sensor motors can be used everywhere in place of brushed DC motors, especially when high starting torque and speed control are important. PMDC applications without sensors include RC aircraft, automotive fuel pumps etc., where you want high power/rpm in a very limited space. They have no place in primary mover systems for cars. |
| SG-1:
I think this short video would be of interest: Electroboom (why 3-phase?) |
| james_s:
If you're building a toy like a go-kart sort of thing then a BLDC motor will probably be your best bet, they are available for RC models, some quite large, up to 10HP or so. If you want to convert an actual car to electric then forget it, 20V will never cut it, there's a reason real EVs use several hundred Volts. You need several tens of kilowatts to propel a fullsized car at a reasonable speed, that's a lot of power any way you slice it and if your voltage is low that means the current has to be crazy high. |
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