AC/DC converters with wider voltage regulation range
First Claim
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1. A converter, comprising:
- a first DC/DC converter comprising a transformer, a primary side inverter coupled to a primary side of the transformer, and a secondary side rectifier coupled to a secondary side of the transformer, wherein the primary side inverter or the secondary side rectifier operates at multiple operating modes comprising multi-level half-bridge modes;
a second non-isolated DC/DC converter coupled to the first DC/DC converter, the second non-isolated DC/DC converter being a DC/DC converter without having an isolation transformer in a power train; and
a control circuit coupled to the first DC/DC converter, configured to determine an operating mode for the primary side inverter and an operating mode for the secondary side rectifier, and change the operating mode of the primary side inverter or the operating mode of the secondary side rectifier, the control circuit determining the operating mode for the primary side inverter or the operating mode for the secondary side rectifier by;
determining a first input voltage sub-range that an input voltage of the converter falls in;
determining a second output voltage sub-range that an output voltage required of the converter falls in; and
determining the operating mode for the primary side inverter or the operating mode for the secondary side rectifier according to a pre-determined mapping between a first combination and a second combination, wherein the first combination comprises the first input voltage sub-range and the second output voltage sub-range, and the second combination comprises the operating mode of the primary side inverter and the operating mode of the secondary side rectifier.
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Abstract
A converter is provided. The converter includes a first DC/DC converter, a non-isolated DC/DC converter and a control circuit. The first DC/DC converter includes a transformer, a primary side inverter and a secondary side rectifier. The primary side inverter and a secondary side rectifier are operable at multiple operating modes. The control circuit determines an operating mode for the primary side inverter or the secondary side rectifier, and controls the primary side inverter or the secondary side rectifier to change its respective operating mode.
91 Citations
20 Claims
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1. A converter, comprising:
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a first DC/DC converter comprising a transformer, a primary side inverter coupled to a primary side of the transformer, and a secondary side rectifier coupled to a secondary side of the transformer, wherein the primary side inverter or the secondary side rectifier operates at multiple operating modes comprising multi-level half-bridge modes; a second non-isolated DC/DC converter coupled to the first DC/DC converter, the second non-isolated DC/DC converter being a DC/DC converter without having an isolation transformer in a power train; and a control circuit coupled to the first DC/DC converter, configured to determine an operating mode for the primary side inverter and an operating mode for the secondary side rectifier, and change the operating mode of the primary side inverter or the operating mode of the secondary side rectifier, the control circuit determining the operating mode for the primary side inverter or the operating mode for the secondary side rectifier by; determining a first input voltage sub-range that an input voltage of the converter falls in; determining a second output voltage sub-range that an output voltage required of the converter falls in; and determining the operating mode for the primary side inverter or the operating mode for the secondary side rectifier according to a pre-determined mapping between a first combination and a second combination, wherein the first combination comprises the first input voltage sub-range and the second output voltage sub-range, and the second combination comprises the operating mode of the primary side inverter and the operating mode of the secondary side rectifier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method, comprising:
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providing a signal to a converter, the converter comprising a first DC/DC converter coupled to a second non-isolated DC/DC converter, wherein the first DC/DC converter comprises a primary side inverter coupled to a primary side of a transformer and a secondary side rectifier coupled to a secondary side of the transformer, the primary side inverter or the secondary side rectifier operable at multiple operating modes comprising multi-level half-bridge modes; and switching the primary side inverter or the secondary side rectifier from a first operating mode to a second operating mode in response to a determination that is made based on a pre-determined mapping between a first combination and a second combination, the first combination comprising an input voltage sub-range that an input voltage of the converter falls in and an output voltage sub-range that an output voltage required of the converter falls in, and the second combination comprising an operating mode for the primary side inverter and an operating mode for the secondary side rectifier. - View Dependent Claims (15, 16, 17, 18)
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19. A circuit, comprising:
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a first DC/DC converter comprising a transformer, a primary side inverter coupled to a primary side of the transformer, and a secondary side rectifier coupled to a secondary side of the transformer, wherein the primary side inverter or the secondary side rectifier operates at multiple operating modes comprising a two-level half-bridge mode and a three-level half-bridge mode; a second non-isolated DC/DC converter coupled to the first DC/DC converter sequentially, the second non-isolated DC/DC converter being a DC/DC converter without having an isolation transformer in a power train; and a control circuit coupled to the first DC/DC converter, configured to determine an operating mode for the primary side inverter and an operating mode for the secondary side rectifier, and change the operating mode of the primary side inverter or the operating mode of the secondary side rectifier, the control circuit determining the operating mode for the primary side inverter or the secondary side rectifier according to a first mapping in a plurality of mappings, wherein each of the plurality of mappings maps a first combination to a second combination, the first combination comprising an input voltage sub-range and an output voltage sub-range of the circuit, and the second combination comprising the operating mode of the primary side inverter and the operating mode of the secondary side rectifier. - View Dependent Claims (20)
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Specification