A wide voltage energy conversion circuit and control method thereof
By adopting a two-stage circuit structure and a real-time communication control module in a bidirectional power supply circuit, the problem of small voltage regulation range of single-stage circuits is solved, achieving wider applications and higher safety performance.
CN118589896BActive Publication Date: 2025-04-04张哲玮
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Patent Information
- Application Number
- CN202410556549.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2044-05-07
AI Technical Summary
Technical Problem
The existing single-stage bidirectional power circuit has a high voltage on the DC bus side and a small voltage regulation range, which limits its application range.
Method used
It adopts a two-stage circuit structure, including a pre-stage bidirectional AC/DC conversion circuit and a post-stage bidirectional DC/DC conversion circuit, and achieves a larger voltage regulation range through real-time communication between the front and rear control modules.
Benefits of technology
The application range of bidirectional power supply is extended, the safety performance of the circuit is improved, and the DC bus voltage utilization and output waveform quality are improved through optimized control strategies.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention discloses a wide voltage energy conversion circuit and a control method thereof, wherein the conversion circuit comprises an AC / DC conversion circuit and a DC / DC conversion circuit connected to each other, and further comprises a front-stage control module and a rear-stage control module; the front-stage control module controls the AC / DC conversion circuit through a front-stage drive module according to the phase current, phase voltage and line voltage acquired by the front-stage sampling module, and the rear-stage operation state acquired by the front-stage communication module; the rear-stage control module controls the DC / DC conversion circuit through a rear-stage drive module according to the high-voltage side information and low-voltage side information acquired by the rear-stage sampling module, and the front-stage operation state acquired by the rear-stage communication module. The front-stage bidirectional AC / DC conversion circuit adopts the SPWM control strategy of the third harmonic injection method to effectively improve the DC bus voltage utilization rate and the output waveform quality, and the rear-stage isolated bidirectional DC / DC conversion circuit makes the voltage regulation range larger, and can also increase the electrical isolation of the high and low voltage sides, thereby improving the safety performance of the circuit.
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