I once overheard the following snippet of conversation between the Senior Engineer (SE) and the SMDE
SE: “Why did you do it like that?”
SMDE: “Because it means that the current more quickly builds up in the motor coils after they are switched in…engineering sense”
Speculation on my part...
He may have intended for constant current regulation to act during the time a coil is switched on. The coil would receive higher voltage immediately, in order to attract a distant magnet as strongly as possible.
Then while current builds in the coil, the magnet gets closer, and voltage is reduced by the current regulator.
A smps, operating at several kHz, would easily be able to do all this while a coil was energized, say 1/400 or 1/800 of a second.
He may have believed this would increase torque, as well as overall efficiency.
I'm not knowledgeable enough to say whether this would or wouldn't work.
For a fleeting instant , I suspected that he was deliberately trying to lead the project astray, perhaps due to his grudge against the company…..he used to openly declare that he had a grudge against the company….he was often heard shouting at managers who asked him to write proving reports for some of his designs.
Again I'm speculating... He may have wanted to keep some things a secret, in order to protect his ideas.
It is common for a 'star performer' to create a successful project, and then watch superiors take credit for it. He may even have an innovative design which is being developed, which is stolen by a superior or a colleague.
This may be their purpose of asking him for proving reports for his design, so his idea can be someone else's.
One cannot be blamed for becoming disgruntled. As a consequence, he has to do some inexplicable things, such as leave out crucial details when explaining his methods. Etc.