逆变式弧焊电源是新一代的弧焊电源,其特点是速度快,直流输出电流波纹小,电弧稳定,质量小,体积小,能耗低。
The inverter arc welding power source is the new power source and features high speed, small DC current ripple, stable arc, light weight, small capacity and low power consumption.
提出一种电网电压不对称情况下抑制三相脉宽调制(PWM)电流型变流器(CSC)直流输出电流二次谐波、减少网侧电流低次谐波的控制方法。
This paper presents a new control strategy to eliminate second harmonic of dc output current in the 3-phase unbalanced network voltage PWM current-source converters (CSC).
直流高压电源输出电压和电流的稳定性,对产生稳定的电晕电场极为重要。
The stability of voltage and current output from HV DC power supply is very important for generating a stable HV electric field.
直流高压电源输出电压和电流的稳定性 ,对产生稳定的电晕电场极为重要。
The stability of voltage and current output from HV DC power supply is very important for generating a stable HV electric field.
这类仪器在脉冲操作模式下还能够输出大大超出其直流能力的电流值。
Pulsed operation also allows these instruments to output current levels well beyond their DC capabilities.
另外,还对滤波器的结构和参数对输出直流电压脉动和发电机相电流波形的影响及相电流谐波进行了仿真分析。
In addition, the thesis analyzes the influence of the filter structure and parameters on the output DC voltage ripple and the shape of phase currents, as well as harmonics of phase currents.
并采用优化的SAPWM调制信号,提高了直流电压的利用率,并能有效地抑制逆变器输出的谐波电流。
Also, optimized SAPWM modulation wave has been utilized, improving the utility ratio of DC voltage and restraining effectively the output harmonic current of inverter.
本文针对直流电机调速装置输入和输出侧退耦电容对地电流干扰的影响进行研究。
This paper analyzes the effects of the input and output decoupling capacitances on the grounding current EMI in DC motor drives.
直流高压电源输出电压和电流的稳定性对产生稳定的高压复合电场极为重要。
The stability of voltage and current outputted by HV DC power is important to generate stable high-voltage electric field .
该DC /AC转换部分直接转换为电流输入由直流电源成交流电,并输出交流电。
The DC/AC conversion section converts a direct current inputted from a direct current power source into an alternating current, and outputs the alternating current.
本文详细分析了在异步调制下,直流电压的二次脉动对逆变器输出电流以及电机转矩的影响。
This paper analyses the influence of the rippled DC voltage to the output voltage of the inverter and the motors.
电流环软启动通过输出电流指令递增实现,电压环软启动则比较了直流侧电压指令逐步升高法、恒定电流充电法、变PI参数调节法三种策略。
Three soft start-up technique for voltage loop are compared with each other, which are the reference of DC bus voltage gradually increasing, constant charging current and different PI modulation.
介绍600A直流电流标准源具有10 ~ 600 A直流标准电流输出能力。
The 600a dc standard current source is designed in this paper, which can output 10 ~ 600a dc current.
该电源可实现变极性方波交流、直流、脉冲电流等多种输出。
The power can output several kinds of welding current such as variable polarity square wave AC, DC and pulse current etc.
由于发射器的载波泄漏会对线性度造成影响,论文提出了使用7位电流型DAC来校正上调制器的输出直流失调来提高载波抑制。
To prevent the carrier leakage caused by DC-offset, the 7-bits DAC is inserted to cancel this dc-offset.
其次,本文采用直流电压外环、电流内环的双闭环控制方法,既保证了逆变器输出的静态误差为零,又保证了逆变器良好的输出波形。
Secondly, the DC voltage loop and inner current closed-loop control method, both to ensure zero static error of the inverter output, but also to ensure that the inverter output waveform.
直流开关电源整流模块效率与输出电流存在直接相关性,目前电源正常工作时模块输出电流远低于额定电流,处于低效率区间。
Efficiency of rectifier module has relationship with its output current. Power supply works in low efficiency condition because output current below rated current far away.
本文通过电流注入法对某型直流固态继电器输入端与输出端的电磁脉冲损伤机制进行了实验研究,确定了两种失效模式。
The electromagnetic pulse(EMP) damage mechanism and failure modes are obtained for the input port and output port of solid state relays by current injection method.
目前国内外电动车直流驱动功率变换器使储能电源输出电流从零到电机电枢电流高频脉动,不利于延长动力电池的使用寿命。
At present power converters of DC driving system make power supply outputs a high-frequency pulsating current, which is from zero to the armature current. This large ripple damages batteries.
直流电压表pa 2:指示设备输出的二次侧直流电流。
DC voltmeter PA2: the secondary DC current exported by indicating device.
这种缺乏静态,直流偏移电流输出变压器的核心手段,可更小,因为它不需要空气间隙,以防止核心饱和从静态直流偏移电流。
This lack of static, DC offset current in the output transformer means that the core can be made smaller, because it requires no air gap to prevent core saturation from the static DC offset current.
为了给智能仪表提供廉价标准电流信号输出接口,可以使用RC低通滤波器,从PWM中分离出与占空比成正比的线性直流电压信号。
To provide intelligent instruments with the cheap interface of the standard current sign, the RC low pass filter is used for producing a voltage signal which is proportion to PWM's duty rate from PWM.
监测各直流馈电输出的电压、电流,各馈电输出开关状态、熔断器状态和防雷器状态,当发生异常情况时发出声光报警;
Monitor every feed-voltage and feed-current of DC output, every output state of switch, and state of fuse and lightning arrester. Under abnormal condition, monitor produces aural and visual alarm.
监测各直流馈电输出的电压、电流,各馈电输出开关状态、熔断器状态和防雷器状态,当发生异常情况时发出声光报警;
Monitor every feed-voltage and feed-current of DC output, every output state of switch, and state of fuse and lightning arrester. Under abnormal condition, monitor produces aural and visual alarm.
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