One switch multi-phase modulator
First Claim
1. An electrical apparatus comprising:
- a bridge circuit having a plurality of rectifier legs electrically coupled in parallel, said parallel connection defining a top node and a bottom node, each of said rectifier legs comprising a first and a second rectifier coupled in series, said series connection of said rectifiers defining an input node therebetween;
a switch having a control input, and a power input switchably coupled to a power output, said power input being coupled to said top node, and said power output being coupled to said bottom node, said switch coupled in parallel with said rectifier legs of said bridge circuit thereby;
a controller having a control output coupled to said control input of said switch for regulating the opening and closing of said switch, said switch electrically decoupling and coupling said top note from/to said bottom node thereby; and
an electrical device having a plurality of windings, said windings having a line and a neutral terminal, configured in a quasi-wye configuration having a disassociated neutral, each of said neutral terminals of said windings being coupled to one of said input nodes of said rectifier legs.
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Accused Products
Abstract
An electrical apparatus, comprises a bridge circuit having a plurality of rectifier legs electrically coupled in parallel. Each of the rectifier legs comprises a first and a second rectifier coupled in series and having an input node therebetween. The electrical apparatus further comprises a switch, having a control input, a power input, and a power output, coupled in parallel with the bridge circuit, and a controller having a control output coupled to the control input of the switch for regulating the opening and closing of the switch. When the bridge/switch element is coupled to the disassociated neutral terminals of a wye wound electrical device, the controller modulates the opening and closing of the switch to provide an current controlled soft start of the device, as well as continued motor drive capability, including acceleration and breaking of the device. When the element is coupled to the disassociated neutral of a multi-phase generator or transformer, the controller modulates the opening and closing of the switch to provide output power regulation. This regulation allows controlled battery utilization and charging in one embodiment.
38 Citations
21 Claims
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1. An electrical apparatus comprising:
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a bridge circuit having a plurality of rectifier legs electrically coupled in parallel, said parallel connection defining a top node and a bottom node, each of said rectifier legs comprising a first and a second rectifier coupled in series, said series connection of said rectifiers defining an input node therebetween; a switch having a control input, and a power input switchably coupled to a power output, said power input being coupled to said top node, and said power output being coupled to said bottom node, said switch coupled in parallel with said rectifier legs of said bridge circuit thereby; a controller having a control output coupled to said control input of said switch for regulating the opening and closing of said switch, said switch electrically decoupling and coupling said top note from/to said bottom node thereby; and an electrical device having a plurality of windings, said windings having a line and a neutral terminal, configured in a quasi-wye configuration having a disassociated neutral, each of said neutral terminals of said windings being coupled to one of said input nodes of said rectifier legs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A regulated power supply, comprising:
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a bridge circuit having a plurality of rectifier legs electrically coupled in parallel, said parallel connection defining a top node and a bottom node, each of said rectifier legs comprising a first and a second rectifier coupled in series, said series connection of said rectifiers defining an input note therebetween; a switch having a control input, and a power input switchably coupled to a power output, said power input being coupled to said top node, and said power output being coupled to said bottom node, said switch coupled in parallel with said rectifier legs of said bridge circuit thereby; a controller having a control output coupled to said control input of said switch for regulating the opening and closing of said switch, said switch electrically decoupling and coupling said top node from/to said bottom node thereby; a permanent magnet generator having a stator having a plurality of windings, each having a line and a neutral terminal, configured in a quasi-wye configuration having a disassociated neutral, said neutral terminal of each of said plurality of stator windings being coupled to one of said input nodes of said rectifier legs; voltage sensing means coupled to at least one of said line terminals of said windings for monitoring voltage generated thereon, said voltage sensing means communicating voltage information to said controller; and
whereinsaid controller monitors said voltage information, calculates a switch closure period, and generates a pulse-width modulated close command in response thereto to regulate said generated voltage. - View Dependent Claims (17, 18)
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19. A regulated transformer rectifier, comprising:
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a bridge circuit having a plurality of rectifier legs electrically coupled in parallel, said parallel connection defining a top node and a bottom node, each of said rectifier legs comprising a first and a second rectifier coupled in series, said series connection of said rectifiers defining an input node therebetween; a switch having a control input, and a power input switchably coupled to a power output, said power input being coupled to said top node, and said power output being coupled to said bottom node, said switch coupled in parallel with said rectifier legs of said bridge circuit thereby; a controller having a control output coupled to said control input of said switch for regulating the opening and closing of said switch, said switch electrically decoupling and coupling said top node from/to said bottom node thereby; a transformer having a plurality of primary windings, each having a line and a neutral terminal, configured in a quasi-wye configuration having a disassociated neutral, and at least one secondary winding having a line and a neutral terminal, each of said neutral terminals of said primary windings being coupled to one of said input nodes of said rectifier legs, said line terminals of said primary windings being coupled to an external source of electrical energy; an output rectifier having at least one input coupled to said line terminal of said at least one secondary winding, and an output; voltage sensing means coupled to said line terminal of said at least one secondary winding for monitoring the voltage present thereon, said voltage sensing means communicating voltage information to said controller; and
whereinsaid controller monitors said voltage information, calculates a switch closure period, and generates a pulse-width modulated close command in response thereto to regulate said voltage. - View Dependent Claims (20, 21)
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Specification