A high-frequency intermittent control system and method for a bidirectional series resonant converter

A series resonance, control system technology, used in control/regulation systems, DC power input conversion to DC power output, instruments, etc., can solve the problems of affecting the normal operation of the circuit, low pulse frequency, large voltage, etc., to reduce switching losses. , The effect of reducing voltage ripple and suppressing vibration

Active Publication Date: 2021-09-07
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A high-frequency intermittent control system and method for a bidirectional series resonant converter
  • A high-frequency intermittent control system and method for a bidirectional series resonant converter
  • A high-frequency intermittent control system and method for a 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, including a first filter circuit, a first inverter / rectifier circuit, a resonant circuit, a high-frequency transformer, and a second inverter / rectifier circuit , the second filter circuit, voltage and current acquisition circuit, controller, drive circuit; the bidirectional series resonant converter can realize the buck and boost functions at the same time, and realize a wide working range, and all switches have achieved a wide range of zero current switching, reducing switching losses. Pulse control is added to the switching cycle and the pulse can be up to half of the resonant frequency, thus reducing the voltage ripple. The control strategy can make the system have linear power transmission characteristics, and the system characteristics are relatively simple and 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 Patents(China)
IPC IPC(8): H02M3/335H02M1/14H02M1/32
CPCH02M1/14H02M1/32H02M3/33584H02M1/0054Y02B70/10
Inventor 岳浩江董翰林方支剑谢非孙皓天魏治国
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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