查询词典 converter process

A phase-shifted controlling PWM DC/DC full bridge converter with softswitching is proposed and used to realize a constant current power of20A(5～48V).This full bridge converter utilizes the transformer leakageinductance(or the resonant inductance in series with transformersprimary)and the autoecious capacitance of MOSFET to achieveZVS(Zero-Voltage-Switching),as a result it can decrease the switchingwaste,increase the switching frequency,and diminish the power bulk.

本文使用一种通过移相控制进行脉宽调制的软开关全桥变换器来实现20A(5～48V)恒流源，这种全桥变换器利用变压器的漏感、原边串联谐振电感和功率管的寄生电容来实现开关管的零电压开通，降低了开关损耗，提高了开关频率，减小了电源体积。

AT89C51 is the hardcore of this part which has other peripheral chips such as A/D converter, calendric clock, voltage converter and memory.

PC机部分主要是用VB编写的程序来实现数据通讯、数据显示和数据处理的功能。

Then the voltage source type matrix converter mathematics model is established each in 3-phase static and circumrotate coordinate system, moreover by open-loop simulation, the simulation results show that the voltage source type matrix converter can realize the frequency range very broad sine wave input-output, moreover by regulating circuit parameter, the power factor in input side reaches 1 approximately, realization static VAR compensator function.

然后分别建立了电压源型矩阵变换器在三相坐标系和旋转坐标系下的数学模型，并且对电压源型矩阵变换器进行开环仿真，仿真的结果表明电压源型矩阵变换器能够实现频率范围很广的正弦波输入输出，而且通过调整电路参数使得输入侧的功率因数约为1，实现静止无功补偿器的功能。

Use aerobic converter steel-making to this kind of molten iron, desulphurization rate can exceed 30%～ commonly 35%, because this need not use pretreatment of molten iron to decoke, use aerobic converter steel-making to be able to take off sulfur only divide 0.045% the following.

对此类铁水采用氧气转炉炼钢，脱硫率一般可以超过30%～35%，因此不必采用铁水脱硫预处理，仅采用氧气转炉炼钢即可将硫脱除到0.045%以下。

Based on analysis of factory converter slag,predominate phosphorus was found concentrated in a solid solution of dicalcium silicate and tricalcium phosphate,as reported in some research about slow cooled converter slags.

研究显示，如文献中对缓冷钢渣的研究结果一样，工厂稳定化处理后的转炉钢渣中的磷主要以磷酸三钙与硅酸二钙形式的固溶体存在。

A method is also provided for reducing axial space within a dual-input clutch transmission having a torque converter, including providing an on-axis transmission pump with a housing and rotor set, providing a torque converter with a rotatable hub which is drivingly connected to the rotor set for powering of the transmission pump, and mounting the dual-input clutch to the pump housing for support.

还提供一种方法以减少带变矩器的双输入离合器变速器的轴向空间，包括提供带有壳体和转子组的同轴变速器泵，提供带有可旋转毂的变矩器，所述可旋转毂以驱动的方式连接到转子组以为变速器泵提供动力，并且将双输入离合器安装到泵壳体上以支撑。

Based on solving the coupler mode equarions of PPLN wavelength converter, the scheme of controlling the PPLN wavelength converter using electrooptical effect is proposed for the first time.

分析了PPLN波导中基于级联倍频与差频全光波长变换特性，在模拟求解PPLN倍频耦合波方程的基础上，提出了这种器件的电光调控方案，并首次论证了作为电光开关的可能性。

They are soft starter , frequency converter and brushless -ringless converter.

为此，介绍了软启动器、变频器、无刷无环启动器的特点和技术演变过程，以及在城市供水系统中的应用。

Based on the working principle of fuzzy control and characters of soft-switching technology, it applies fuzzy control to soft-switching power converter and designs a normal fuzzy controller for SEPIC power converter introduced former. By simulating the fuzzy control system,it validates the availability and rationality of this fuzzy controller.

根据模糊控制的工作原理和软开关技术的特点，将模糊控制引入到软开关功率变换器中，为前面介绍的 SEPIC 功率变换器设计常规模糊控制器，并进行了仿真分析，得出仿真结果，验证了该模糊控制器的有效性及合理性。

Setting zero-current switching quasi-resonant SEPIC converter as example, it analyzing the switching mode of SEPIC converter in detail based on the instance of switches' on-off.

以零 电流开关准谐振 SEPIC 变换器为例，根据开关管的通断情况，详细分析了 SEPIC 变换器的开关模态。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48