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High-frequency intermittent control system and method for bidirectional series resonant converter

A series resonance and control system technology, applied in the direction of control/regulation system, DC power input conversion to DC power output, instruments, etc., can solve problems affecting the normal operation of the circuit, ripple, large voltage, etc.

Active Publication Date: 2021-02-02
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the current mainstream pulse control, the pulse frequency is very low, which will cause large voltage ripples and affect the normal operation of the circuit.

Method used

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  • High-frequency intermittent control system and method for bidirectional series resonant converter
  • High-frequency intermittent control system and method for bidirectional series resonant converter
  • High-frequency intermittent control system and method for bidirectional series resonant converter

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Embodiment Construction

[0048] In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0049] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings. Please refer to figure 1 , figure 2 , figure 1 , figure 2 A schematic diagram of a high-frequency intermittent control system of a bidirectional series resonant converter of the present invention and a circuit diagram of an embodiment are shown. For convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows.

[0050] A high-frequency intermittent control system of a bidirectional series resonant converter in this embod...

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Abstract

The invention discloses a high-frequency intermittent control system and method suitable for a bidirectional series resonant converter. The high-frequency intermittent control system comprises a firstfilter circuit, a first inverter / rectifier circuit, a resonant circuit, a high-frequency transformer, a second inverter / rectifier circuit, a second filter circuit, a voltage and current acquisition circuit, a controller and a drive circuit. The bidirectional series resonant converter can realize voltage reduction and voltage boosting functions at the same time, a relatively wide working range isrealized, all switches realize wide-range zero-current switching, and the switching loss is reduced. Pulse control is added in the switching period, and the pulse can reach half of the resonant frequency, so that the voltage ripple is reduced. The control strategy can enable the system to have a linear power transmission characteristic, and the system has simple characteristics and is easy to operate.

Description

technical field [0001] The invention relates to the technical field of power electronics and power automation equipment, in particular to a high-frequency intermittent control system and method for a bidirectional series resonant converter. Background technique [0002] Bidirectional resonant conversion is a device that can make DC power flow in both directions, and can be a bridge between power systems with different voltage levels. At present, bidirectional series resonant converters have high transmission efficiency and relatively simple control methods. It is widely used in the charging and discharging of lithium-ion batteries. However, since the voltage changes on the charging side and the discharging side of the lithium-ion battery are usually large during charging and discharging, the bidirectional DC-DC converter must have a wide gain range. In addition, the DC-DC converter not only needs to achieve high efficiency under heavy load, but also needs high transmission ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M1/14H02M1/32
CPCH02M1/14H02M1/32H02M3/33584H02M1/0054Y02B70/10
Inventor 岳浩江方支剑谢非孙皓天魏治国
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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