herbie Posted January 27, 2010 Report Share Posted January 27, 2010 found it in my local dump, cleaned it up, it operates on AC fine, want to use it in a vw bug as traction motor, it has 4 brushes, 4 poles, the brushes are attached to an aluminum shorting ring, and there's a centrifugal switch that when the motor has accelerated somewhat short all the commutator bars together, i guess to make the rotor like a squirrel cage. do i have a shot at making it into a dc motor if insulate 2 of the brushes, i'm guessing the opposite 2 of 4 ? thanks for your advice. Link to comment Share on other sites More sharing options...
marke Posted February 7, 2010 Report Share Posted February 7, 2010 Hello herbie Although it has brushes, it will not work as a DC motor. A DC motor has a commutator which switches the DC current through different sets of windings on the armature as the armature rotates. The armature, commutator and brushes are designed to create a magnetic field at an angle relative to the field windings. As the armature rotates, the coil on the armature is switched to the next coil and the next etc An AC motor does not have a comutator, it has slip rings. There is no switching as the motor rotates. To run this motor on DC, you would need an inverter to generate AC from the DC. Best regards, Mark. Mark Empson | administratorSkype Contact = markempson | phone +64 274 363 067LMPForum | Power Factor | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | Pressure Transducers | Smart Relay | GSM Control | Mark Empson Website | AuCom | Soft Starters Link to comment Share on other sites More sharing options...
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