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Method and device for determining transmission power of dual-active bridge circuit under extended phase shift control

A technology for transmitting power and dual active bridges, which is used in output power conversion devices, control/regulation systems, and DC power input conversion to DC power output, etc. The effect of improving usability

Active Publication Date: 2021-11-26
BEIJING MECHANICAL EQUIP INST
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  • Description
  • Claims
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Problems solved by technology

Since the EPS strategy needs to control two parameters, the situation of the inductor current is complicated, so currently only the power output under the conditions of D1>0 and D2>0 is analyzed

Method used

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  • Method and device for determining transmission power of dual-active bridge circuit under extended phase shift control
  • Method and device for determining transmission power of dual-active bridge circuit under extended phase shift control
  • Method and device for determining transmission power of dual-active bridge circuit under extended phase shift control

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Embodiment Construction

[0058] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and together with the embodiments of the present invention are used to explain the principle of the present invention and are not intended to limit the scope of the present invention.

[0059] Dual active bridge circuits such as figure 1 As shown, it is composed of a transformer, inductor, active full bridge on both sides of the transformer, capacitors C1, C2, power supply U1, U2, and can control the size and direction of the transmission power by controlling D1 and D2 according to the energy demand relationship on both sides. .

[0060] Such as figure 2 As shown, the embodiment of the present invention provides a dual active bridge circuit extended phase-shift control power transmission analysis method, including the following steps:

[0061] Step 201. Obtain circuit par...

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Abstract

The invention relates to a method and device for determining the transmission power of a dual-active bridge circuit under extended phase shift control and belongs to the technical field of circuit control. The method comprises the steps that: a circuit parameter of a to-be-detected dual-active bridge circuit in one switching period is obtained; a power transmission function and a boundary function thereof are determined according to a circuit parameter power calculation formula in one switching period; according to the power transmission function and the boundary function thereof, a power transmission model is constructed, the power transmission model takes an external phase shift angle and an internal phase shift angle as independent variables and takes transmission power as a dependent variable, and the value ranges of the external phase shift angle and the internal phase shift angle are both (-1, 1); and according to the power transmission model, power transmission analysis is performed on the to-be-detected dual-active bridge circuit to determine the transmission power of the dual-active bridge circuit. According to the method and device provided by the technical schemes provided by the invention, power output analysis can be carried out on the DAB in a full phase-shift angle range, so that the applicability of the extended phase shift control power transmission analysis method is improved.

Description

technical field [0001] The invention relates to the technical field of circuit control, in particular to a method and device for determining the transmission power of a dual active bridge circuit with extended phase shift control. Background technique [0002] Among many DC / DC converter circuits, the dual active bridge (DAB) circuit has the advantages of good dynamic response, bidirectional power flow, wide voltage conversion range, and high transmission efficiency. It has gradually become a research hotspot in recent years. [0003] The control strategy of the DAB circuit includes single-phase-shift control (Single-phase-shift, SPS), extended phase-shift control (Extended-phase-shift, EPS) and dual-phase-shift control (Dual-phase-shift, DPS) and so on. Wherein, the EPS has two phase shift angles D1 and D2, which are the inner phase angle and the outer phase angle respectively. Since the EPS strategy needs to control two parameters, the situation of the inductor current is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/3353
Inventor 赵晓宇安超季金虎
Owner BEIJING MECHANICAL EQUIP INST
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