초록 ▼

A direct current power controller for use in electrical control systems such as aircraft control circuits. The controller utilizes a field effect transistor (FET) as the switching element. A bias voltage supply circuit powers a gate driving circuit, current limiting circuit, and trip indicating circ

A direct current power controller for use in electrical control systems such as aircraft control circuits. The controller utilizes a field effect transistor (FET) as the switching element. A bias voltage supply circuit powers a gate driving circuit, current limiting circuit, and trip indicating circuit. Gate driving circuitry is not directly connected to the system ground, thus minimizing load interference with controller performance and eliminating the need for level shifting circuitry. Remote control circuitry is provided.

대표청구항 ▼

A direct current control system comprising: a direct current load; a source of direct current; a ground conductor connected to said load and said source of direct current; a direct current power controller comprising a power field effect transistor (FET) with source, drain and gate terminals wherein

A direct current control system comprising: a direct current load; a source of direct current; a ground conductor connected to said load and said source of direct current; a direct current power controller comprising a power field effect transistor (FET) with source, drain and gate terminals wherein said drain is connected to said source of direct current; current sensing means connected between said FET source terminal and a load terminal which is connected to said direct current load; a ground terminal connected to said ground conductor; means for establishing a bias voltage which is greater than a line voltage supplied by said source of direct current to said FET drain terminal, where said line voltage and said bias voltage are both measured with reference to said ground terminal; means for turning on said FET by applying a voltage to said gate terminal, wherein said means for turning on said FET is referenced to a common bus which is connected to said load terminal; and current limiting means responsive to a voltage across said current sensing means for turning off said FET by removing voltage from said gate terminal, wherein said current limiting means is referenced to said common bus.