Two-stage insulated bidirectional DC/DC power converter using a constant duty ratio LLC resonant converter
First Claim
1. A two-stage bidirectional DC/DC power converter using a constant duty ratio LLC resonant converter, the two-stage bidirectional DC/DC power converter comprising:
- an LLC resonant converter operating at a constant duty ratio;
a bidirectional converter joined to a front part of the LLC resonant converter, the bidirectional converter configured to perform a boost converter function of converting a first input voltage into a first consistent voltage for input to the LLC resonant converter when the bidirectional converter operates in a forward direction, and to perform a buck converter function of reducing a second input voltage that is output from the LLC resonant converter into a second consistent voltage when the bidirectional converter operates in a reverse direction; and
a bidirectional converter control unit configured to control changes in the input voltages received by the bidirectional converter and regulate the voltages output from the LLC resonant converter to thereby maintain the first consistent voltages for input to the LLC resonant converter, such that the LLC resonant converter operates at the constant duty ratio.
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Accused Products
Abstract
A two-stage insulated bidirectional DC/DC power converter is disclosed. A two-stage insulated bidirectional DC/DC power converter according to an embodiment of the invention has the characteristic of including: an LLC resonant converter operating at a constant duty ratio; a bidirectional converter joined to a front part of the LLC resonant converter and configured to perform a booster converter function of outputting the input voltage at a consistent input voltage for the LLC resonant converter, and a buck converter function of reducing the voltage by way of the LLC resonant converter and then outputting a consistent voltage; and a bidirectional converter control unit configured to control changes in an input voltage of the bidirectional converter and regulate an output voltage of the LLC resonant converter to thereby maintain a consistent input voltage of the LLC resonant converter, such that the LLC resonant converter operates at a constant duty ratio.
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Citations
17 Claims
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1. A two-stage bidirectional DC/DC power converter using a constant duty ratio LLC resonant converter, the two-stage bidirectional DC/DC power converter comprising:
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an LLC resonant converter operating at a constant duty ratio; a bidirectional converter joined to a front part of the LLC resonant converter, the bidirectional converter configured to perform a boost converter function of converting a first input voltage into a first consistent voltage for input to the LLC resonant converter when the bidirectional converter operates in a forward direction, and to perform a buck converter function of reducing a second input voltage that is output from the LLC resonant converter into a second consistent voltage when the bidirectional converter operates in a reverse direction; and a bidirectional converter control unit configured to control changes in the input voltages received by the bidirectional converter and regulate the voltages output from the LLC resonant converter to thereby maintain the first consistent voltages for input to the LLC resonant converter, such that the LLC resonant converter operates at the constant duty ratio. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification