×

System for charging electrical storage device and method of making same

  • US 9,520,741 B2
  • Filed: 11/28/2011
  • Issued: 12/13/2016
  • Est. Priority Date: 11/28/2011
  • Status: Active Grant
First Claim
Patent Images

1. A propulsion system comprising:

  • a motor drive;

    a direct current (DC) link electrically coupled to the motor drive;

    a first leg coupled to the DC link and comprising a first power switch coupled in series with a second power switch via a first node;

    a first inductor coupled to the first node, wherein the first leg and inductor form a first bi-directional DC-DC voltage converter;

    a first energy storage device (ESD) electrically coupled to the first inductor;

    a second leg coupled to the DC link and comprising a third power switch coupled in series with a fourth power switch via a second node;

    a second inductor coupled to the second node, wherein the second leg and second inductor form a second bi-directional DC-DC voltage converter;

    a charging circuit comprising a transformer having a first terminal coupled to the first node and having a second terminal coupled to the second node;

    a second ESD coupled to receive charging energy from the transformer; and

    a controller coupled to the first and second legs and configured to cause a first variable voltage difference between the first and second nodes during an interleave duration of a frequency period to generate the charging energy, wherein the second ESD can be charged during operation of the motor drive.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×