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Method and apparatus for increasing current capacity of a distributed drive system

  • US 9,882,421 B2
  • Filed: 11/20/2015
  • Issued: 01/30/2018
  • Est. Priority Date: 05/14/2015
  • Status: Active Grant
First Claim
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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:

  • 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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