Hi all,
I am hoping Peter Lindemann might be able to respond to this thread at some stage. I bought the Electric Motor Secrets video set including advanced motor secrets with David Squires' contribution. I have built a stepper motor similar to the conceptual one described by Peter at the end of his lecture. It is modified slightly with a very low resistance coil in series with the supply to give that initial 'kick' to the stator coils as they are switched on, in line with what David Squires recommends. I am using 100V 23A MOSFET with internal zener diode protection (100v) so I should recover most of the 'waste' energy from the coil for the recharge battery. I have seen the voltage spikes from the coil as it is switched off but the voltage on the recharge battery does not appear to be rising, should there be a capacitor in the circuit across the recharge battery perhaps? Here is a schematic.
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Interested in what anyone might have to say on this.
CF
I am hoping Peter Lindemann might be able to respond to this thread at some stage. I bought the Electric Motor Secrets video set including advanced motor secrets with David Squires' contribution. I have built a stepper motor similar to the conceptual one described by Peter at the end of his lecture. It is modified slightly with a very low resistance coil in series with the supply to give that initial 'kick' to the stator coils as they are switched on, in line with what David Squires recommends. I am using 100V 23A MOSFET with internal zener diode protection (100v) so I should recover most of the 'waste' energy from the coil for the recharge battery. I have seen the voltage spikes from the coil as it is switched off but the voltage on the recharge battery does not appear to be rising, should there be a capacitor in the circuit across the recharge battery perhaps? Here is a schematic.
Interested in what anyone might have to say on this.
CF
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