High speed high power H-bridge switch for inductive loads

Details High speed high power H-bridge switch for inductive loads High speed high power H-bridge switch for inductive loads

1990-05-29

1991-12-10

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307270, 307254, 307257, H03K 17687, H03K 301, H03K 1760, H03K 1774

Patent

active

050721410

ABSTRACT:
A switch for an inductive load includes a first leg having a first field effect transistor connected between one terminal of the load to the high potential terminal of a power supply and a second leg having a second field effect transistor connected between the other terminal of the load and the low potential terminal of the power supply. A plurality of current paths located on opposite sides of the load terminals connected in parallel and extend from one of the load terminals to one of the power supply terminals. Each current path includes an inductor connected in series with a diode. A choke energy path is associated with each current path and includes a diode connected in series with a resistors. The inductors in the current paths operate to inhibit reverse recovery current through the diodes while the choke energy paths dissipate oscillation energy in the switch upon operation of the transistors to connect the inductive load across the terminals of the power supply.

REFERENCES:
patent: 4540899 (1985-09-01), Pelly

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