报告了与高输入电压脉宽调制逆变器兼容的实验性准方波dc-dc转换器的设计和性能。制作并测试了一个面包板模型，该模型具有56伏（+最低和-20％）的直流输入和200伏（* l％）的直流输出。功率输出为1千瓦，连续过载能力为150％。这些晶体管具有速度，增益和饱和特性，因而具有很高的效率。环形粉末金属磁芯（Ni-17F3-2Mo）代替叠层磁芯被用于以7赫兹载波频率运行的低损耗电力变压器中。集成电路控制部分和比例电流驱动系统还有助于在宽范围的输出功率上产生高效率，峰值效率为92％。 ，它几乎与输入电压无关。该转换器设计用于通过最大程度地减少零件数量，降低组件额定值，包含过载保护电路以及使用不会产生潜在破坏性电压或电流尖峰的电路来实现高可靠性。总零件数少于100，这些组件的重量约为6磅（2.7千克）

The design and performance of an experimental quasi-square-wave dc-dc converter compatible with a high-input-voltage pulse-width-modulation inverter is reported. A breadboard model, which has a 56-volt (+lo- and -20-percent) dc input with a 200-volt (*l-percent) dc output, was built and tested. Power output was 1 kilowatt with a continuous overload capability of 150 percent. These transistors offered speed, gain, and saturation characteristics which resulted in high efficiencies. Toroidal powdered-metal cores (Ni- 17F3-2Mo) instead of laminated cores were used in a low-loss power transformer operating at the 7 kilohertz carrier frequency. An integrated-circuit control section and a proportional current drive system also helped produce high efficiencies over a broad range of output power, with a peak efficiency of 92 percent. put, and it was almost independent of the input voltage. This converter was designed for high reliability by minimization of component parts, component derating, inclusion of an overload protection circuit, and by the use of circuits which produced no potentially damaging voltage or current spikes. The total parts count is less than 100, and the weight of these components is approximately 6 pounds (2.7 kg)