The whole high power switch supply have four bidirectional dc / dc converters which are parallel connection . the theory of phase - shifted full - bridge zvs pwm dc / dc converter and the theory of push - pull boost converter are introduced . the methods of realize zvs ( zero voltage switching ) is studied in detail 文中介绍了移相全桥式软开关变换及推挽式dc dcboost变换的工作原理，分析了移相全桥zvs的实现和占空比的丢失，并设计了各自的控制电路和保护电路。
In this dissertation , a novel bidirectional dc / dc converter ' s topology was designed , witch used in vehicle power supply systems . the converter is composed of fundamental bidirectional switch cell , using phase - shifted full - bridge zvs pwm dc / dc converter in buck circuit and using push - pull boost converter in boost circuit 文中从双向dc dc变换基本单元入手，针对某大型车载电源系统设计了一种新型双向dc dc变换器拓扑电路，降压变换采用移相全桥式zvs ? pwm功率变换，升压变换采用推挽式dc dcboost功率变换。
This paper proposes a two - armed push - pull inverter , including its topologies , power distributions in every switching devices and modulation schemes . the major parameters such as thd and df of this vsi are analyzed . comparison study shows that the quality of two - armed push - pull vsi is better than those of square - wave vsi . and the switching loss is lower than that of pwm scheme at same time , especially used in wide frequency range . detailed calculating formulae and experimental results are presented 该文介绍了一种双臂推挽式逆变器,包括其电路拓扑、每个开关器件的功率分布和调制策略.分析了这种电压源逆变器的主要参数,如总谐波失真度( thd )和失真指数( df ) .比较研究表明,这种逆变器的质量明显优于方波逆变器,同时开关损耗明显低于pwm调制方式,特别适用于宽频范围.介绍了计算公式和实验结果
Based theory of the fiber optic accelerometer is presented in details , according to the the principle of phase modulation a new experimental scheme is described . in this scheme , a center supported flexural disk design is chosen as the sensing mechanism , the fiber of the interferometer is attached on each side of the flexural disk , such design is helpful to the desirable features such as high acceleration sensitivity and immunity to extraneous measurands 第二章中从不同方面详细介绍了相位调制型光纤加速度计的基础理论，并由此提出了一种新型的加速度计测量方案，该方案通过在柔性盘的上下侧面粘上干涉仪双臂光纤形成推挽式系统，可以有效地消除光纤干涉仪易受温度等环境影响的缺点，并由于采用推挽方案，使灵敏度比采用单臂测量提高了一倍。
The procedure of the test is as follows : first , the piezoelectric stack has been examined to test the performance parameters of the piezoelectric material ; second , the 2 - x actuator has been functioned with different static voltage to test its capability ; last , function the 2 - x actuator with voltage with different frequencies to test its dynamic properties . all the output of the actuator has been measured by the laser vibration measurement 首先对压电堆进行试验,验证压电材料的性能参数;再对推挽式双x驱动器施加不同的静电压驱动它,验证作动器的驱动能力,最后对推挽式双x驱动器输入不同频率的电压驱动,测量该驱动机构的动态特性,试验均采用激光测试仪测量推挽式双x驱动器的输出特性。
Similarly to other methods for smart rotor , the most important and difficult problem is the design of the actuator . first , the piezoelectric smart material has been studied and an actuator with piezoelectric stack has been proposed in the mode of parallel connection in electrics and series - wound in mechanics according to the property of the piezoelectric porcelain . second , a 2 - x actuator has been designed with the piezoelectric stack active part according to the triangle theory 本文首先对压电智能材料进行研究,根据压电陶瓷的特点,采用电学并联、力学串联的设计模式,提出一种压电堆主动驱动部件,在此基础上,根据三角形放大原理,设计了推挽式双x放大机构,并将压电堆主动件应用于推挽式双x机构,形成了推挽式双x驱动器。
The topologies family include single four - quadrant power switch mode , push - pull mode , half - bridge mode , and full - bridge mode circuits . taking full - bridge mode circuit as an example , the operational mode , steady principles , transient voltage feedback control strategy of the converter are investigated . the output characteristic curve , the design for the key circuit parameters and the reference sinusoidal circuit which is synchronous with the signal of n or 1 / n times line voltage frequency are given 该电路拓扑族包括单四象限功率开关式、推挽式、半桥式、全桥式电路，以全桥式电路为例分析研究了这类换器工作模式、稳态原理与电压瞬时值反馈控制策略，给出了变换器的外特性曲线、关键电路参数、与电网电压n倍频或n分频信号同步的基准正弦电路的设计。
The circuit topologies family of voltage mode ac - ac mode ac / ac converters with high frequency link include eight circuit topologies , such as single forward mode , interleaved - forward mode , push pull - full wave mode , push pull - full bridge mode , half bridge - full wave mode , half bridge - full bridge mode , full bridge - full wave mode , and full bridge - full bridge mode etc . the circuit topologies family of current mode ac - ac mode ac / ac converters with high frequency link include single four - quadrant power switch mode , push - pull mode , half - bridge mode , and full - bridge mode circuits . taking full bridge - full bridge mode circuit as an example , principle of uni - polarity phase shifting controll is introduced 电压源交?交型高频环节ac ac变换器电路拓扑族，包括单正激式、并联交错正激式、推挽全波式、推挽桥式、半桥全波式、半桥桥式、全桥全波式、全桥桥式八种电路；电流源交?交型高频环节ac ac变换器电路拓扑族，包括单四象限功率开关式、推挽式、半桥式、全桥式四种电路。
Then novel circuit structure and circuit topologies family of current source ac / ac converters with high frequency ac link , based on flyback converter , are proposed . the circuit structure which can transfer one unregulated sinusoidal voltage with high thd into another regulated constant frequency sinusoidal voltage with low thd , is constituted of input cycloconverter , high frequency storage transformer , output cycloconverter , input and output filter . the circuit topologies family include single four - quadrant power switch mode , push - pull mode , half - bridge mode , and full - bridge mode circuits 本文提出了基于反激flyback变换器的电流源高频交流环节ac ac变换器电路结构及其拓扑族，该电路结构由输入周波变换器、高频储能式变压器、输出周波变换器以及输入、输出滤波器构成，能够将一种不稳定劣质的正弦交流电变换成另一种同频率稳定的优质正弦交流电压；该电路拓扑族包括单四象限功率开关式、推挽式、半桥式、全桥式等四种电路。
