Closed loop and open synchronization of the phase switchings in

Details Closed loop and open synchronization of the phase switchings in Closed loop and open synchronization of the phase switchings in

1998-09-17

2000-08-22

Sircus, Brian

Electricity: motive power systems

Switched reluctance motor commutation control

318601, 318603, 318810, 318430, 388812, H02K 2300

Patent

active

061077631

ABSTRACT:
The synchronizing circuit of a digital drive system of an electric motor is configured to function in a closed loop or in an open loop mode by adding a minimum number of elements to the normal scheme of a closed loop synchronizing circuit. In practice, by adding only one programmable register and a pair of two-input de-multiplexers, the system is able to automatically switch from one mode of operation to the other mode. The programmable open loop mode permits compensating for the phase angle between the current flowing through the windings and the drive voltage applied thereto, as in case of a voltage mode driving.

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