Controller circuit for Hilden Brandt motor needed..

[Honk]

Also, I am very very curious how you are handling the BEMF in your controller.
Are you simply providing it a clean path to a capacitor or battery at collapse?

The Back EMF is handled by the "Boosting Flux Respons Enhancement feature"........and this is where the magic happens :-)
Later on I will release the schematic and gerber documents and also answer all your questions regarding the controller.
I still have to perform some very important valve tests before I know all about the controller and it's performance.
I'm not sure how the controller will handle a real Hilden-Brand magnet valve. When building 3 of those valves I can simulate a real 3 phase
motor motor by connecting them to the controller output and then I'll connect the controller input to a 3 bit decimal shift register.
The 3 bit decimal shift register will simulate the position feedback from the points and make it easy to simulate 10 RPM to 3000 RPM.

[wattsup]

@Honk

Thanks for the heads up and I understand you are not talking about specifics of the circuit. Then maybe ask others here as I am sure you are already aware of others doing control or lack of control of BEMF. Look at the Otto - ECD threads. Most of the guys are saying their circuit is heating up and some have burned out.

At the 3000 rpm level the BEMF will be extreme so all I am saying is make double sure you know what you are doing. Consider having the straightest route to a (non circuit) BEMF absorber. Maintain the negative solid and switch the coil at each collapse out of the circuit to a cap or battery. If you are taking the BEMF into the circuit, you could risk overheating and energy loss. I did not notice any connection to your circuit for a large capacitor or battery control section to absorb the BEMF energy and release it, so I am a little worried. I am not an EE but when turning motors that develop a strong enough drag, the BEMF can be severe.

[Honk]

I can never be totaly sure that the controller won't break down if abused. This is why I have to build the test valves.
In the manual that Jack will read I will of course mention that never unplugg the controller while operating the motor.
This could for sure destroy the controller by the EMF spike.

In my test I have not seen worse EMF at higher RPM than lower RPM. It stays the same.
But when you increase the current you will also increase the back EMF as well.
When operating Jack's motor the current stays much the same at hard or light work. It's not like an ordinary motor.
This is how the motor is supposed to provide more out than in. At low RPM and fantastic torque to run a generator.

[JackH]

Later,,,,,,JackH

[Humbugger]

Just curious...I keep hearing that the BEMF stays the same regardles of RPM.  That seems odd to me from an energy-integral perspective.  It would be one thing that the individual BEMF power pulses each stay the same but don't they occur more often at higher RPM (thus representing more possibly destructive energy)?