1) IPFM (Integral Pulse Frequency Modulation)
整体脉冲频率调制
2) pulse frequency modulation
脉冲调频，脉冲频率调制
3) pulse frequency modulation
脉冲频率调制
1.
In order to meet the requirements of this transfer mode,this paper adopts constant peak and base phases to implement the current external characteristics,and uses the pulse frequency modulation(PFM) combined with the high-frequency inverter and the DSP digital control to adjust the average current and to further control the melting velocity of the welding wire.
为实现一脉一滴熔滴过渡这种最理想的脉冲熔化极活性气体保护(MAG)焊熔滴过渡形式,采用峰值阶段恒流和基值阶段恒流实现电源外特性,针对两阶段恒流外特性等速送丝条件下弧长的控制问题,基于高频逆变技术和DSP数字化控制技术,通过脉冲频率调制(PFM)调节方式实现平均电流的调节,从而调节焊丝熔化速度,解决一脉一滴熔滴过渡过程中弧长的控制问题。
2.
Its A/D functional circuitry, HSO unit and other units were used to realize the digital acquisition, the pulse width modulation (PWM) and pulse frequency modulation control strategies.
将ＭＣＳ－８０９８单片机应用于电液高速开关阀控制系统中，作为数字型控制元件，利用其内部Ａ／Ｄ和高速输出ＨＳＯ单元，实现了对系统的数据采集、脉冲宽度调制（ＰＷＭ）和脉冲频率调制（ＰＦＭ）控制。
3.
Optimal methods are also presented on system control methodology (current control and pulse frequency modulation) and frequency compensation.
根据研究结果提出系统在控制方法选择(电流控制和脉冲频率调制)和频率补偿方面的优化办法。
4) PFM
脉冲频率调制
1.
A PFM and PWM dual-mode DC-DC regulator is proposed in this paper.
结合脉冲频率调制(PFM)和脉冲宽度调制(PWM)的特点,设计了一种混合型的降压DC-DC控制器,提高了全负载情况下的效率,并进行了多种低功耗设计,轻负载时效率提高。
2.
A PFM over-current comparator which has been successfully applied to the chip of Step-Down regulator is presented.
设计了一个新颖的基于Step-Down PWM电源管理芯片的PFM(脉冲频率调制)限流比较器电路,在轻载时使芯片进入PFM工作模式,因此能够延长电池寿命并且大幅度的提高Step-Down PWM电源管理芯片的效率。
3.
Keeping high efficiency and perfect output voltage(VOUT) in wide range of loads,a DC/DC Converter which controlled by different limited current and constant off-time during different VOUT rising step,is designed on the basis of typical pulse frequency modulation(PFM) DC/DC converter topology.
为了使设计的DC/DC转换器在宽负载范围内能保持高效率和高性能的输出电压,基于典型脉冲频率调制转换器拓扑结构,提出一种在不同升压阶段,由可调整的限制电流和固定分时控制的DC/DC转换器芯片的设计。
5) pulse-frequency modulation
脉冲频率调制
1.
A design method of a high-efficiency,low-power DC-DC converter with pulse-width modulation(PWM) and pulse-frequency modulation(PFM) modes is presented in the paper.
提出了一种基于脉冲宽度调制(PWM)和脉冲频率调制(PFM)模式的高效率、低功耗直流电压转换器的设计方法。
2.
And then,the pulse-frequency modulation way which can be use to adjust the output voltage and power has also been introduced.
本文提出了一种新颖的软开关半桥变换器,首先介绍了变换器的电路结构,电路工作在谐振状态,通过脉冲频率调制方法调控输出电压和输出功率,并通过时序和电路拓扑分析了变换器的基本原理,最后给出了原理样机的实验波形。
3.
There are two kinds of converter regulated power supply,pulse-width modulation (PWM) and pulse-frequency modulation (PFM).
换器型稳压电源分为脉冲宽度调制(PWM)型和脉冲频率调制(PFM)型两种,前者在我国已有较多应用,后者应用尚少。
6) pulse frequency modulation (PFM)
脉冲频率调制
1.
The paper introduces the working principle,overall design,hardware module function and constitution,software flow of the road lamp anti-theft alarm system based on the method of low frequency pulse frequency modulation (PFM) signal,and briefly describes the effect of trial application.
介绍一种基于低频脉冲频率调制信号检测法的路灯电缆防盗报警系统的工作原理、总体设计、硬件模块构成及作用、软件流程,并简单介绍了试点应用的效果。
补充资料：整体
整体
即"整倍体"。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条