Is there a latest parts list or parts pkg that would go with Paul's controller board ? I don't think I need any power components if I use OEM recovered parts ?
Hope this helps someone figure out how the controller needs to be built for a SR motor:
Switched-reluctance drive basics
A typical switched-reluctance setup includes four components — the motor, a power converter, a logic circuit, and sensors. Power converters for switched-reluctance motors require only one switch in series per phase windings because the torque is independent of current polarity. Each phase is independent, so the failure of one does not bring the whole motor down. There are a few types of converters:
stepper-drives-FAQ-11-motor-reluctance-1-2
This is an example asymmetric bridge converter for three phases.
Asymmetric bridge converters involve turning on two switches per phase. If the current gets too high, these switches are turned off.
This configuration stores energy in the motor’s phase windings to keep current flowing in the same direction until it depletes.
(n+1) switches and diodes are more efficient than asymmetric bridge converters.
This is because this configuration allows the power devices to share switch operation. (n+1) does have restricted control when phases overlap, however.
stepper-drives-FAQ-11-motor-reluctance-1-3
This configuration is known as (n+1) switches and diodes because there are three phases but four switches and four diodes.
Bifilar drives contain bifilar windings. Bifilar refers to two wires wound around a common core.
Inserting these windings allows the circuit to restore magnetic energy. The voltage in the switches can be much higher than that of the voltage source. However, bifilar windings are complex.
A C-dump converter also recovers energy. It contains a capacitor the can resend stored magnetic energy back to the DC source. This setup uses a minimal amount of power switches which allows independent phase control.
However, there is a drawback of limited commutation because of the voltage difference between the capacitor and the supply. Any energy circulating between the capacitor and the connection causes additional losses in the switched-reluctance motor itself.
stepper-drives-FAQ-11-motor-reluctance-1-4
The bifilar windings shown here restore magnetic energy.
Sensors are another component of switched-reluctance motor drives. These can come as a variety of encoders.
There were images/schematics of the mentioned paragraphing, but, they didn't come over.
Link to where I found this info.