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Charger control circuit based on PFC and LLC topology wide range voltage output

A control circuit and voltage output technology, applied in battery circuit devices, circuit devices, control/regulation systems, etc., can solve problems such as limiting the high efficiency of chargers, and achieve the effects of convenient design, improved efficiency, and low THD

Pending Publication Date: 2017-08-11
WUXI SANSHI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for a charger with a wide range of voltage output, since the traditional PFC uses a fixed voltage output, the LLC resonant circuit does not work in a good state within the full output voltage range, which severely limits the high efficiency of the charger.

Method used

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  • Charger control circuit based on PFC and LLC topology wide range voltage output
  • Charger control circuit based on PFC and LLC topology wide range voltage output
  • Charger control circuit based on PFC and LLC topology wide range voltage output

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Embodiment Construction

[0018] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive. It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be intervening elements at the same time. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpos...

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Abstract

The invention discloses a charger control circuit based on PFC and LLC topology wide range voltage output. The charger control circuit comprises a PFC main power circuit, an LLC converter, a feedback circuit, and a PFC control circuit. The power supply end of the PFC main power circuit is connected with AC input, and the output end of the PFC main power circuit is connected with the input end of the LLC converter and the sampling end a1 of the PFC control circuit. The input end of the PFC main power circuit is connected with the control end c1 of the PFC control circuit. The output end of the LLC converter is connected with the sampling end a2 of the feedback circuit. The output end b2 of the feedback circuit is connected with the input end b1 of the PFC control circuit. The charger is guaranteed to work in an optimal state in a wide output voltage range, and the efficiency of the charger is improved. The charger control circuit adopts hardware control, and has advantages of simple structure, high reliability, and low costs.

Description

technical field [0001] The invention relates to the field of charger control, in particular to a control circuit of a charger with wide range voltage output based on PFC and LLC topologies. Background technique [0002] Global energy is becoming increasingly tense, and the greenhouse effect and air pollution are becoming more and more serious. Governments of various countries are vigorously promoting the development of new energy technologies. As an important part of new energy technology, electric vehicles must speed up the construction of charging facilities and equipment. The construction of chargers requires high power density, high efficiency, high PF value, and low THD. The combination of active PFC and full-bridge LLC full-bridge resonant circuit can well meet the requirements. The full-bridge LLC resonant circuit has excellent advantages: in the full load range (including light load), it can realize zero-voltage switching; when the operating frequency is less than ...

Claims

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Application Information

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IPC IPC(8): H02M3/335H02M1/42H02J7/04
CPCH02J7/04H02M1/4241H02M1/4266H02M3/33523Y02B70/10Y02P80/10
Inventor 傅盛如莫永福
Owner WUXI SANSHI ELECTRONICS
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