Abstract

This paper presents a new method of controlling resonant switches of a converter, in which the instants of control pulses supply to the main and auxiliary switches of the circuit are strictly synchronized with pulse-width modulation (PWM) logic signals. Any classical options providing the specified quality of the output voltage and current can be used as such signals. The control pulses durations of the main switches have the same time intervals as those of the PWM control signals, since the control pulses are shifted relative to the PWM signals by a constant time delay. The durations of control pulses of auxiliary switches used to activate resonant switching processes are constant and independent of changes of the electric mode parameters of the circuit and the scatter of the parameters of resonant circuit components. The synchronizing mode is shown to be achieved by introducing two additional time intervals into each resonant switching cycle compensating the effect of external and internal factors on the duration of the required control pulses for the main and auxiliary switches of the converter. Such additional time intervals are the duration of free—that is, without significant loss of power—circulation of current (energy) in the inductance of the resonant circuit. In addition, it is shown that the necessary conditions for free circulation are the capability of the main converter switches for bilateral current conductivity and the absence of energy absorption sources in the circulation circuit. The diagrams are presented of switching processes demonstrating the advantages of a new method for controlling resonant switches of the inverter in a wide range of the supply voltage and load current variations of the circuit.

中文翻译：

---

使用经典脉宽调制算法匹配谐振开关操作

摘要

本文提出了一种控制转换器谐振开关的新方法，其中，向电路的主开关和辅助开关提供控制脉冲的时刻与脉宽调制（PWM）逻辑信号严格同步。提供指定质量的输出电压和电流的任何经典选项都可以用作此类信号。主开关的控制脉冲持续时间与PWM控制信号具有相同的时间间隔，因为控制脉冲相对于PWM信号偏移了恒定的时间延迟。用于激活谐振开关过程的辅助开关的控制脉冲的持续时间是恒定的，并且与电路的电模式参数的变化以及谐振电路组件的参数的分散无关。示出了通过在每个谐振开关周期中引入两个额外的时间间隔来实现同步模式，以补偿外部和内部因素对转换器的主开关和辅助开关所需的控制脉冲的持续时间的影响。这样的额外时间间隔是谐振电路的电感中电流（能量）的自由循环持续时间（即，没有明显的功率损失）。此外，显示出自由循环的必要条件是主转换器开关具有双向电流传导能力以及循环回路中没有能量吸收源。