As you can see in the previous experiments, the higher flyback circuit load is very counter productive to rotor speed when only using the blocking diode and direct diode flyback output. However it can also be seen that the direct diode output consistently delivers a higher current into the load battery2 than the transformer/flyback coils circuits. The transformer and flyback coil configurations, do however, show a consistent increase in rotor speed (torque) accompanied by lower supply currents, even without the use of a bemf blocking diode.

With this particular motor assembly, when comparing rotor speeds versus supply current, it can be clearly seen that the transformer and flyback coil arrangements are beneficial, and are enhanced by increased loads on the flyback circuit. The efficiency of the transformer arrangements is greater with a flyback load and no blocking diode, than the diode blocking arrangement with no flyback load. This answers another one of my questions; Do I have to block the bemf to achieve better motor performance? The data suggests the answer is No, but I have to be imaginitive in dealing with it, because the data on page 13 shows that trying to use it directly will lower motor torque and increase supply consumption.

Just for the record, I haven't shown the transformer circuit performance without a flyback load connected, and I haven't shown direct diode ouput in series with the flyback coils without the transformer interface. So the two Figs below show these.

The fact that these experiments have been carried out using air coils is important to me, because they preclude any existence of core drag, and any speed/torque increase being attributed to neutralizing that drag. This leaves the experiments free from those considerations, and able to explore other mechanisms for increased efficiency.

Another interesting aspect of the transformer/coils configuration compared to the motor coil only configuration is the relative characteristics of the cemf current into the load battery2 when there is a physical load put onto the rotor. In the instance of using motor coils only, with direct diode output, the cemf current reduces as the rotor speed reduces due to the physical load. The supply current also increases with the application of a physical load. But, while the supply current also increases with the application of a physical load in the instance/s of the transformer/coils configurations, the cemf into the load battery2 does not reduce as rotor speed reduces, but actually increases. Fig 12 below shows the whole rig used for these experiments and the rotor and coils.