Quote:
Originally Posted by JRMichler
A three phase motor will run just fine when single phased IF:
1) It's already up to speed AND
2) The load is less than 1/3 of nameplate power.
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DCB's questions about torque and speed constraints lead me to think variable vehicle drive eliminating the above.
While they will run it does bad things to the windings. If they stop and go into "shudder" the burn out quickly.
We normally install phase monitors to shutdown the motor starter to prevent burning the motor up.
Chopping half the phase would reduce the torque but not the speed.
Frequency controlls speed in a 3 phase motor.
Maybe I am lost, isn't the E-tek a DC motor?
Per your schematic it is a 3 pole DC motor.
Your best and cheapest bet would be to use a 555 chip the fire the IGBTs from 0 to 100 percent.
If it is low enough amperage it will work fine, perhaps sized for a bicycle or scooter. No room or weight allowance for "Paul and Sabrina's cheap controller" type situation.