Current drive circuits

Details Current drive circuits Current drive circuits

1977-09-15

1978-08-08

Shoop, William M.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363 40, 363136, 365 6, H02M 700

Patent

active

041060881

ABSTRACT:
A current drive circuit for deriving a triangular current waveform for driving an inductive load, such as the field coils of a bubble memory, comprises a series of at least four diodes connected between the positive and negative input voltage lines. A pair of switching devices, such as switching transistors, are connected in series such that each switching device is in parallel with two of the diodes. The junction between the switching devices is also connected to one output for the inductive load. The intermediate diodes are connected together and to one side of a time delay circuit, the opposite side of which is connected to the second output for the opposite side of the inductive load. A modification of the invention comprises a second diode and switching circuit connected between the time delay circuit and the second output.

REFERENCES:
patent: 3316476 (1967-04-01), Olson et al.
patent: 3406327 (1968-10-01), Mapham et al.
patent: 3932798 (1976-01-01), Chalmers et al.
patent: 3972036 (1976-07-01), Navratil
patent: 3972037 (1976-07-01), Hess, Jr. et al.

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