系统采用霍尔传感器和电压传感器对电压和电流采样，转化成电压信号输给压控芯片LM 231。
The Halls sensor and voltage sensor is used for sampling current and voltage in the system, and the signals are transformed into voltage signal and sent to the LM231.
而被称为“同步向量”的设备能以一秒30次或更快的速度采样电压和电流——向电力公司和系统操作员提供有关电网健康状况的信息更为精确。
Devices called synchrophasors can sample voltage and current 30 times a second or faster-giving utilities and system operators a far more accurate view of the health of the grid.
在硬件设计中对电压、电流采样电路，IGBT驱动电路以及通讯和人机接口电路进行了设计。
In part of hardware design, voltage and current sampling circuit, IGBT driving circuit communication and man-machine interface circuit are designed.
系统以DSP为控制核心，可自动识别并适应不同的电压和电流等级，采用程控放大、变化采样频率以获得优化的阵列测试效果。
The tester with DSP core could get excellent results by judging and adopting the different value of voltage and current, programmed amplifying and changing the frequency of sample.
对系统硬件设计的DSP 3．3V电源的获取、电压电流采样模块、IGBT驱动、一般I／O信号的处理、故障监测和串口通信电路进行了研究分析。
The overall hardware design scheme is performed, such as DSP 3. 3V power, voltage and current sampling module, IGBT driving circuit, I/O signal processor, fault detection module and COM circuit etc.
因此，在一些特殊及精度要求不高的场合，由只根据采样电流、电压等易测量，通过特定方法估算转子位置和转速的无位置传感器控制策略将得到广泛应用。
Thus, sensorless control strategy which only according the sampling of the current and voltage to estimate the rotor position and speed by specific methods will be widely applied.
最后设计调试了永磁电机直接转矩控制系统，包括IPM驱动和保护电路，电流电压采样电路以及转速采样电路等。
At last, the control system including the drive and protect circuits of the IPM and the current sample circuits and so on are designed.
单片机对焊接电流、电弧电压、电流给定、脉冲周期、占空比、基值电流、收弧电流衰减时间、前气和后气时间等焊接参数进行采样、计算和控制。
The welding current, arc voltage, preset current, the period and ratio of pulse, base current, down slope time, gas pre and post flow time are sampled, calculated and controlled by microprocessor.
将采样得到的电机定子电压和电流转换为数字量后输入到转速估计系统来估计转速，并跟实际测得的转速进行对比。
The sampled stator voltages and currents were conversion to digital quantity and given to speed estimation system for estimating speed, then contrast it with the actual measured motor speed.
借助输出电压采样和霍尔元件，设计了电流、电压反馈电路，形成了闭环控制系统。
A closed loop control system is formed by current and Voltage feedback system by means of HALL sensor and potentiometer.
借助输出电压采样和霍尔元件，设计了电流、电压反馈电路，形成了闭环控制系统。
A closed loop control system is formed by current and Voltage feedback system by means of HALL sensor and potentiometer.
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