pulse frequency control

A High-Efficiency Pulse Frequency Modulation Control Scheme

一种高效率的PFM控制策略

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This method can be applied to different countries' UWB frequency spectrum programming for its flexible control of pulse frequency and bandwidth.2.An improvement is made to the multi-user Prolate Spheroidal Wave Functions ( PSWF) IR UWB orthogonal pulse waveforms design.

该方法具有频率、带宽的灵活可控性，适用于不同国家的UWB频谱规划方案。2.对多用户椭球波函数（PSWF）脉冲UWB正交波形设计方法进行了改进。

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The pulse control strategy is to control pulse frequency based on expected voltage output frequency, so as to realize no system high frequency and avoid the PWM strategy.

脉冲控制策略以期望的电压输出频率控制脉冲频率，实现系统无高频，避免了脉宽调制。

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WEDM include: high-frequency pulse power, wire tube, machine bed, the working fluid circulation system, motion control components.

电火花线切割机床包括：高频脉冲电源、丝筒、机床床身、工作液循环系统、运动控制等部分。

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So a pulse power burn-in method has been proposed, which measure junction temperature by thermal parameters and control junction temperature by adjusting the power, frequency and duty of pulse to ensure the junction temperature meet the requirement of burn-in.

因此，参考GJB128A-97标准，提出了一种脉冲功率老炼的方法。采用热敏参数法来测量结温，同时调整脉冲的功率、频率和占空比来控制结温，使结温达到老炼要求。

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On idle, using the voltage-feedback control makes PWM modulator output the pulse disjointedly with blocking-oscillation frequency lowered and the pulse width narrowed. Accordingly not only the no-load loss is less, but also the transformer is not easy to saturate.

系统在空载时由于采用电压反馈控制使PWM调制器间断地输出脉冲，间歇振荡的频率低而脉冲宽度窄，不但空载损耗小，而且使变压器不易饱和；

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Semiconductor laser outputs laser beams of pulse width from 1 μ s to continuous frequency of 1 kHz through control circuit.

半导体激光器，通过控制电路输出脉宽从0.5μs到连续、频率1kHz的激光束。

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These reasearch results will greatly promote advancement of theory of aging and breakdown under such pulse condition. As a result, frequency control technique can be widely used. A novel PD signal measurement system and statistic analysis software is presented under square wave pulse voltage.

通过这些研究，将极大地促进变频条件下绝缘老化和击穿理论的发展，使变频调速技术应用前景更加广泛。设计了一种新的脉冲电压下局部放电测量系统和统计分析软件。

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This paper focuses on the large power AFW three-dimension wide-area regulation and control system based on blade precision processing, The parameters such as amplitude, frequency and width which determine the pulse power density could be regulated and controlled automatically for wide ranges.

本文研究了基于叶片加工的大功率脉冲激光幅频宽三维广域调控系统，决定脉冲功率密度的幅值、频率和宽度等参数可大范围自动调控。

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Program control low frequency pulse treatment

程控低频脉冲治疗仪

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