The invention discloses a control circuit for wide-range output of an LLC converter. The control circuit belongs to the technical field of power supplies and comprises a switch bridge unit, a resonance unit and a rectifying and filtering unit, wherein the switch bridge unit comprises a switch bridge composed of 4 MSO tubes, and the rectifying and filtering unit comprises a rectifier bridge, a first switch S1 used for controlling the rectifier bridge to work in a full-wave rectification mode, a second switch S2 used for controlling the rectifier bridge to work in a full-bridge rectification mode, a filtering capacitor C and a resistor R. The technical problem that the output voltage range of the LLC converter is narrow is solved; through controlling the on-off of the first switch S1 and the second switch S2, the output voltage is enabled to work in high-voltage and low-voltage working modes, can adapt to electric automobiles with different battery configurations, and meets an output voltage index in wide range of 200-900 V; and control signals of the first switch S1 and the second switch S2 adopt an interlocking control mode, so that the first switch S1 and the second switch S2 work alternately, can realize seamless switching, and are easy to control.
本发明公开了一种LLC变换器宽范围输出的控制电路,属于电源技术领域,包括开关桥单元、谐振单元和整流滤波单元,开关桥单元包括由4个MSO管构成的开关桥,整流滤波单元包括整流桥、用于控制整流桥工作在全波整流模式的第一开关S1、用于控制整流桥工作在全桥整流模式的第二开关S2、滤波电容C和电阻R,解决了LLC变换器的输出电压范围窄的技术问题,本发明通过控制第一开关S1和第二开关S2通断,使输出电压工作在高电压和低电压工作模式,可以适应不同电池配置的电动汽车,满足输出200V‑900V的宽泛范围输出电压指标,本发明中第一开关S1和第二开关S2的控制信号采用互锁控制方式,使得第一开关S1和第二开关S2交替工作,可以实现无缝切换并且易于控制。
Control circuit for wide-range output of LLC converter
一种LLC变换器宽范围输出的控制电路
2021-04-23
Patent
Electronic Resource
Chinese
IPC: | H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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