Method and Apparatus for Increasing Current Capacity of a Distributed Drive System
First Claim
1. A system for increasing a current capacity of a shared DC bus, wherein the shared DC bus includes a set of DC bus wires and a set of DC bus bars and wherein both the set of DC bus wires and the set of DC bus bars are operable to conduct a DC bus voltage, the system comprising:
- a bus power supply including a first bus capacitance and a first set of terminals, wherein the bus power supply is operable to provide the DC bus voltage to the shared DC bus via the first set of terminals;
at least one inverter module located remotely from the bus power supply, each inverter module including a second bus capacitance and a second set of terminals, wherein the second set of terminals is configured to receive the set of DC bus bars; and
a capacitance module configured to be connected in series between the bus power supply and the at least one inverter module, the capacitance module including a third bus capacitance, an internal DC bus, a third set of terminals, and a fourth set of terminals, wherein;
the third set of terminals is configured to receive the set of DC bus wires,the internal DC bus is electrically connected in series between the third set of terminals and the fourth set of terminals, andthe fourth set of terminals is configured to receive the set of DC bus bars.
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Accused Products
Abstract
An improved system for connecting a DC bus cable and a remote motor drive includes a capacitance module and an extension module that may each be mounted adjacent to the remote motor drive. The capacitance module includes a first DC bus connector and a second DC bus connector. The first DC bus connector includes a terminal block configured to receive a pair of conductors for the DC bus. The first DC bus connector further includes a pair of intermediate bus bars where each of the intermediate bus bars are connected at a first end to the terminal block and at a second end to a circuit board contained within the capacitance module. Traces on the circuit board are routed between the second ends of the intermediate bus bars and the second DC bus connector. The second DC bus connector is configured to be connected to DC bus bars.
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Citations
20 Claims
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1. A system for increasing a current capacity of a shared DC bus, wherein the shared DC bus includes a set of DC bus wires and a set of DC bus bars and wherein both the set of DC bus wires and the set of DC bus bars are operable to conduct a DC bus voltage, the system comprising:
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a bus power supply including a first bus capacitance and a first set of terminals, wherein the bus power supply is operable to provide the DC bus voltage to the shared DC bus via the first set of terminals; at least one inverter module located remotely from the bus power supply, each inverter module including a second bus capacitance and a second set of terminals, wherein the second set of terminals is configured to receive the set of DC bus bars; and a capacitance module configured to be connected in series between the bus power supply and the at least one inverter module, the capacitance module including a third bus capacitance, an internal DC bus, a third set of terminals, and a fourth set of terminals, wherein; the third set of terminals is configured to receive the set of DC bus wires, the internal DC bus is electrically connected in series between the third set of terminals and the fourth set of terminals, and the fourth set of terminals is configured to receive the set of DC bus bars. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for increasing the current capacity of a distributed motor drive system, wherein the distributed motor drive system includes a bus power supply operable to supply a DC bus voltage, at least one inverter module located remotely from the bus power supply, a set of DC bus wires operable to conduct the DC bus voltage, and a set of DC bus bars operable to conduct the DC bus voltage, the apparatus comprising;
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a capacitance module configured to be connected in series between the bus power supply and the at least one inverter module, the capacitance module including; a first set of terminals configured to receive the DC bus voltage from the set of DC bus wires, a second set of terminals configured to provide the DC bus voltage to the set of DC bus bars, and an internal DC bus electrically connected in series between the first set of terminals and the second set of terminals; and an extension module configured to be connected in series between the bus power supply and the at least one inverter module and configured to be connected in parallel with the capacitance module, the extension module including; a third set of terminals configured to receive the DC bus voltage from the set of DC bus wires, a fourth set of terminals configured to provide the DC bus voltage to the set of DC bus bars, and an internal DC bus electrically connected in series between the third set of terminals and the fourth set of terminals, wherein the third set of terminals is electrically connected to the first set of terminals and the fourth set of terminals is electrically connected to the second set of terminals. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A DC bus connector for establishing an electrical connection between a first DC bus wire and a first DC bus bar terminal and between a second DC bus wire and a second DC bus bar terminal, wherein each of the first and the second DC bus bar terminals is mounted to a circuit board, the DC bus connector comprising:
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a first wire terminal configured to receive the first DC bus wire; a second wire terminal configured to receive the second DC bus wire; a longitudinal support member having a first end and a second end opposite the first end, wherein the first wire terminal and the second wire terminal are mounted proximate to the first end of the longitudinal support member and the first and second DC bus bar terminals are proximate the second end of the longitudinal support member; an electrically insulating member mounted to the longitudinal support member between the first wire terminal and the second wire terminal; a first intermediate bus bar having a first end and a second end, wherein; the first end of the first intermediate bus bar is mounted to the longitudinal support member and to the first wire terminal, establishing an electrical connection between the first wire terminal and the first intermediate bus bar, and the second end of the first intermediate bus bar is mounted to the circuit board and electrically connected to the first DC bus bar terminal via a first trace on the circuit board; a second intermediate bus bar having a first end and a second end, wherein; the first end of the second intermediate bus bar is mounted to the longitudinal support member and to the second wire terminal, establishing an electrical connection between the second wire terminal and the second intermediate bus bar, and the second end of the second intermediate bus bar is mounted to the circuit board and electrically connected to the second DC bus bar terminal via a second trace on the circuit board. - View Dependent Claims (18, 19, 20)
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Specification