Synchronous driving method for inductive load and synchronous co

Details Synchronous driving method for inductive load and synchronous co Synchronous driving method for inductive load and synchronous co

1997-08-13

2000-05-23

Wysocki, Jonathan

Electricity: motive power systems

Limitation of motor load, current, torque or force

318492, H02P 700

Patent

active

060669306

ABSTRACT:
In flowing a switching current through an inductive load by way of an H-bridge circuit, a control circuit and a timing signal generating circuit are used to start a current supply operation in accordance with a driving period of a predetermined frequency, thereby increasing the current flowing through the inductive load. In reducing the current, a power source regeneration operation is performed during a power source regeneration period and a commutation operation is performed during a commutation period. The power source regeneration operation and the commutation operation are well balanced with each other, thereby making it possible to perform a high-frequency driving with a switching current having less ripple. Also, since the power source regeneration operation is performed in a long time in the case where the switching current level is reduced, it becomes possible to quickly reduce the current level down to a desired level.

REFERENCES:
patent: 4368411 (1983-01-01), Kidd
patent: 4528486 (1985-07-01), Flaig et al.
patent: 5032780 (1991-07-01), Hopkins
patent: 5578911 (1996-11-01), Carter et al.
patent: 5602452 (1997-02-01), Underhill
patent: 5703456 (1997-12-01), Cox
Ericsson, "Integrated Circuits Data Book," Sep. 1988, pp. 6-36 to 6-43 and 6-52 to 6-61.

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