来恒

本文主体分为七个章节来对恒流UPS进行解析说明。

The text is divided into seven chapters to deal with the UPS with constant current .

介绍了一种采用数字比例积分（PI）调节算法来实现恒流恒压充电功能的锂离子蓄电池性能测试设备。

A performance testing equipment for charging Li ion battery at constant current / voltage controlled by digital adjustment algorithm was introduced .

硬件设计方面，采用了结合MCU和FPGA技术的数字信号发生器，使用了高性能运算放大器来搭建恒电位仪。

DDS which is based on the combination of MCU and FPGA technology is applied in hardware design and high-performance operational amplifiers has also been used to build a potentiostat .

目前，国内的采煤机大部分都是通过调整牵引速度来达到恒额定功率的控制。

At present , a large amount of shearers control constant power through adjusting haulage speed in our country .

考虑到可以采取不同的电路来实现恒流充电，提出了构成线性度良好的锯齿波发生器的3种具体方法：自举式、恒流源式、电压-频率转换式。

In consideration of different circuit can provide constant current , three kinds of concrete methods which can generate well linearity sawtooth-wave have been put forward : bootstrap type , constant current source type , and voltage-current converter type .

针对无刷直流电机的两种恒功率调速策略，本文分析了相电感对其的影响，进而可以根据相电感来选择恒功率调速策略。

In view of the two control methods of constant power for the brushless DC motor , it analyzes the phase inductor influence to different control strategies , and proposes the concept about constant power speed strategy choose based on phase inductor .

根据锌-锰干电池恒阻放电的要求，避开传统的串入固定电阻的检测方法，采用实时采集电池的电压并控制其放电电流的方法来达到恒阻放电的目的。

According to the demand of Zn Mn dry battery of identical resistance discharge , we avoid the traditional test way of tandem fixed resistance and adopt the test way of collecting voltage of the dry battery and controlling its current for identical resistance discharge .

恒流源电路是非线性闭环控制系统，本文应用自动控制原理来讨论交流恒流源的电路设计。

The AC current source circuit is a nonlinear closed loop control system .

考虑到采样过程中，泵流量不稳定会对测量结果造成影响，本文设计通过PID算法来对采样进行恒流控制。

In view of the instability of pump possibly affect the measurement results in airborne radioactive sampling process , PID algorithm is used to keep flow constantly .

另外，感应加热电源需要采用功率控制，来保证电源的恒功率输出，实现加热温度在给定的功率下恒定，满足工件加热要求。

In addition , power control is needed to ensure that both the output power and the temperature under a given power are constant , meeting the heating requirements .