Four different methods to reuse and control universal motors from old washing machines. These motors are known as ‘universal motors’ because the can be driven with both AC and DC current. We look at how to bench test the motors in the first circuit, before having a look at the second, a classic triac based control circuit that has been used in industry for decades.
The video shows how to adjust the speed of the motor and how to improve the classic triac based circuit by rectifying the output and driving the motor with direct current. The gives MUCH better speed regulation, for workshop type applications where the load will vary (eg. when the motor is used to drive a small lathe, disc sander or pillar drill).
The third circuit is one I haven’t tried yet, that builds on the previous circuit. It adds another, more sensitive trica that apparently helps the consistent triggering of the main power triac. Further reading on this circuit
Four different methods to reuse and control universal motors from old washing machines. These motors are known as ‘universal motors’ because the can be driven with both AC and DC current. We look at how to bench test the motors in the first circuit, before having a look at the second, a classic triac based control circuit that has been used in industry for decades.
The video shows how to adjust the speed of the motor and how to improve the classic triac based circuit by rectifying the output and driving the motor with direct current. The gives MUCH better speed regulation, for workshop type applications where the load will vary (eg. when the motor is used to drive a small lathe, disc sander or pillar drill).
The third circuit is one I haven’t tried yet, that builds on the previous circuit. It adds another, more sensitive trica that apparently helps the consistent triggering of the main power triac. Further reading on this circuit
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