The invention belongs to the technical field of new energy wireless charging, and particularly relates to an LCL-S type topology constant-current constant-voltage output control method which comprises a direct-current power supply, an inverter circuit, a primary side compensation circuit, a resonance coil, a secondary side compensation circuit, a rectifying circuit, a filter circuit and a load. And four paths of trigger signals of the inverter circuit are controlled by a resonant frequency change-over switch Switch and a PWM (Pulse Width Modulation) signal generator. The system has the advantages that the resonant frequency of the system is switched through the Switch switch, when the voltage at the two ends of the load reaches the set voltage, the system can be switched from a constant current mode to a constant voltage mode, and the output voltage is the set voltage value. In a constant-current mode and a constant-voltage mode, the system can operate under the zero-phase-angle characteristic. Complex PI control strategies and communication protocols do not exist, a compensation structure of the system does not need to be reconstructed through a switch, and the complexity and cost of the system are greatly reduced.
本申请属于新能源无线充电技术领域,具体为实现了一种LCL‑S型拓扑恒流恒压输出控制方法,包括直流电源、逆变电路、原边补偿电路、谐振线圈、副边补偿电路、整流电路、滤波电路和负载;所述逆变电路的四路触发信号由谐振频率切换开关Switch和一个PWM信号生成器控制。其优点在于,通过一个Switch开关切换系统的谐振频率,当负载两端电压达到设定电压时,系统会从恒流模式切换恒压模式,且输出的电压即为设定的电压值。在恒流和恒压模式下,系统都能在零相位角特性下运行。本发明不具有复杂的PI控制策略和通信协议,并且不需要通过开关重构系统的补偿结构,极大降低了系统的复杂性和成本。
LCL-S type topology constant current and constant voltage output control method and medium
一种LCL-S型拓扑恒流恒压输出控制方法及介质
2024-11-22
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 / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |
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