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A universal solid state power controller for controlling the application of a source voltage to a load comprising a semiconductor switch having a predetermined non-bounce switching characteristic. The switch is responsive to an operating signal for connecting the load to the source voltage. A contro

A universal solid state power controller for controlling the application of a source voltage to a load comprising a semiconductor switch having a predetermined non-bounce switching characteristic. The switch is responsive to an operating signal for connecting the load to the source voltage. A control means has a microcomputer following a predetermined program. The control means is responsive to a command electrical signal and provides the semiconductor switching means operating signal. The microcomputer program has an ac subprogram for SSPC operation with a source voltage of sinusoidal character and a dc subprogram for SSPC operation with a source voltage of direct current character. A voltage selection circuit provides a logic signal of a first polarity to the microcomputer to direct the microcomputer to use the ac subprogram for SSPC operation with an ac source. The logic signal has a second polarity to direct the microcomputer to use the SSPC dc subprogram for operation with a dc source. A current rating selection circuit provides a logic signal to the microcomputer to direct the microcomputer to select a predetermined current rating for the power controller. The invention electrical switch provides a bounce-free closure of the conduction path from the alternating source voltage to the load in response to the command electrical signal. The closure corresponds with a first predetermined sequence of alternating source voltage crossing zero voltage. The invention switch interrupts the conductive path to the load without contact bounce, associated arcing in response to interruption of the command electrical signal.

대표청구항 ▼

A universal solid state power controller for controlling the application of a source voltage to a load under the control of a command electrical signal, resulting in the development of a load current in response to said command electrical signal comprising: a semiconductor switching means having a p

A universal solid state power controller for controlling the application of a source voltage to a load under the control of a command electrical signal, resulting in the development of a load current in response to said command electrical signal comprising: a semiconductor switching means having a predetermined non-bounce switching characteristic, said switching means being responsive to a semiconductor switching means operating signal for connecting said load to said source voltage; control means having a microcomputer following a predetermined program and being responsive to said command electrical signal for providing said semiconductor switching means operating signal; said microcomputer program having an ac subprogram for SSPC operation with a source voltage of sinusoidal character and a dc subprogram for SSPC operation with a source voltage of direct current character; a voltage selection means for providing a logic signal of a first polarity to said microcomputer to direct said microcomputer to use said ac subprogram for SSPC operation with an ac source, said logic signal having a second polarity to direct said microcomputer to use said SSPC dc subprogram for operation with a dc source; a current rating selection means for providing at least one logic signal to said microcomputer to direct said microcomputer to select a predetermined current rating for said power controller; said semiconductor switch means being responsive to interruption of said semiconductor switching means operating signal to interrupt said conduction path source voltage to said load; said invention electrical switch provides a bounce-free closure of said conduction path from said alternating source voltage to said load in response to said command electrical signal, said closure corresponding with a first predetermined sequence of alternating source voltage crossing zero voltage having a first predetermined sequence of polarity change; and said invention electrical switch interrupts the conductive path to said load without contact bounce, associated arcing in response to interruption of said command electrical signal; said closure corresponding with a second predetermined sequence of alternating source voltage crossing zero voltage having a second predetermined sequence of polarity change.