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Control method and control device of two-way resonant converter

A technology of a resonant converter and a control method, which is applied to output power conversion devices, control/regulation systems, DC power input conversion to DC power output, etc., and can solve the problem that the gain cannot be greater than 1

Inactive Publication Date: 2017-01-11
EMERSON NETWORK POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a control method and a control device of a bidirectional resonant converter, which are used to solve the problem that the gain cannot be greater than 1 when the energy flows in the reverse direction in the bidirectional resonant converter

Method used

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  • Control method and control device of two-way resonant converter
  • Control method and control device of two-way resonant converter
  • Control method and control device of two-way resonant converter

Examples

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Embodiment 1

[0023] Embodiment 1 of the present invention provides a control method for a bidirectional resonant converter. The bidirectional resonant converter includes a first chopping part, a resonant part, and a second chopping part connected in sequence. The control method includes:

[0024] When the energy in the bidirectional resonant converter is transferred from the second chopper part to the first chopper part, that is, when the energy flows in the opposite direction, the output voltage of the resonant part is controlled to be the specified voltage Vset within a specified period of time; where -Vh< Vset<+Vh, Vh is the output voltage of the first chopping part.

[0025] Further, the output voltage of the resonance part is controlled to be +Vh or -Vh in periods other than the specified period.

[0026] That is, within the specified period, the second chopping part transfers energy to the resonance part, and the resonance part stores energy. After the specified period, the bidirecti...

Embodiment 2

[0044] Based on the same inventive concept, Embodiment 2 of the present invention also provides a control device for a bidirectional resonant converter, the bidirectional resonant converter includes a first chopping part, a resonant part and a second chopping part connected in sequence, the control Devices include:

[0045] The first control unit is used to control the output voltage of the resonant part to be a specified voltage Vset within a specified period when the energy in the bidirectional resonant converter is transferred from the second chopping part to the first chopping part; wherein, -Vh< Vset<+Vh, Vh is the output voltage of the first chopping part.

[0046] Preferably, the control device also includes:

[0047] The second control unit is used to control the switching frequency of the switching tube in the second chopping section to be greater than or equal to the resonance in the resonance section when the energy in the bidirectional resonant converter is transf...

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Abstract

The invention provides a control method and control device of a two-way resonant converter. By the control method and the control device provided by the invention, when energy in the two-way resonant converter reversely flows, the gain can be greater than 1. The control method comprises the step that output voltage of a resonant part is controlled to be specified voltage Vset within designated time when the energy in the two-way resonant converter is transferred in the direction from a second chopper part to a first chopper part, that is to say, the energy reversely flows, wherein the Vset is smaller than +Vh and greater than -Vh; and Vh is the output voltage of the first chopper part.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a control method and a control device for a bidirectional resonant converter. Background technique [0002] The bidirectional resonant converter is widely used in DC / DC conversion due to its high efficiency. The existing bidirectional resonant converter includes a first chopping part, a resonant part and a second chopping part connected in sequence; as figure 1 As shown, the resonant part may specifically include a resonant inductor Lr, a resonant capacitor Cr and a transformer T; the first chopping part may specifically be figure 1 The full-bridge chopping circuit shown can also be other chopping circuits such as a multi-level chopping circuit; the second chopping part can specifically be figure 1 The shown full-wave chopper circuit may also be other chopper circuits such as a full-bridge chopper circuit. [0003] by figure 1 The bidirectional resonant converter sho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCY02B70/10Y02P80/10
Inventor 雷彪
Owner EMERSON NETWORK POWER CO LTD
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