| 1. | Sine wave for normal power supply , stage square wave for battery power supply
市电供电为正弦波，电池供电为阶梯波 |
| 2. | Phase - modulated 3 step level inverters and its minimization of thd
相位调制的三级电平阶梯波逆变器及其总谐波失真度的最小化 |
| 3. | Ralated software system and hardware system of the power supply are introduced in chapter 5 and chapter 6 respectively
第五章和第六章分别介绍了使用阶梯波调制pwm控制的电源系统相关的硬件系统和软件系统。 |
| 4. | Via theoretical analyzing , we can find that the step reference waveform modulation strategy is an ideal one when frequency modulation ratio is not very high
通过理论分析，可以看出阶梯波调制pwm的确是在频率调制比不高时较好的调制方式。 |
| 5. | In chapter 3 , on the basis of analyzing and comparing with some common pwm modulation methods , a step reference waveform modulation strategy is proposed
在第三章中，在对一些常用的pwm调制方法进行分析比较的基础上，着重介绍了阶梯波调制pwm技术。 |
| 6. | A new complex structure of 12 - stepped wave converter is presented in the paper . it can greatly increase the output voltage without increasing the input dc voltage
摘要提出一种复合型12阶梯波变流器的拓扑结构，在不提高直流输入电压的前提下可以较大幅度提高输出电压。 |
| 7. | The pulse frequency and the ladder wave frequency are two factors that affect the range of velocity adjusting . the range of velocity adjusting is finally decided by the lesser
从步进频率和阶梯波频率两个方面对细分驱动系统的调速域值进行了分析，得出调速域值受两方面综合影响，而且最终结果取两者中域值范围较小者。 |
| 8. | In this scheme digital demodulator is used to detect ifog ' s signal , digital phase ramp modulator is used as feedback controlling and digital filter is used to limit noise and lower the bits of a / d ? d / a converters
闭环方案中，采用数字解调方案进行信号检测，采用数字相位阶梯波调制技术进行反馈控制，采用数字滤波、数值滤波降低噪声和消除a / d 、 d / a转换死区误差。 |
| 9. | Unlike inverters for general purpose , auxiliary inverters of subway vehicle have the characters of high power , wide range of high dc input voltage , entirely sealed electronic units and natural cooling . single pulse width modulation ( pwm ) technology is found to be optimal by comparing several different high power inverter technologies and is utilized in the 2 - channel staircase inverter discussed in this thesis
针对地铁车辆辅助逆变电源的大功率、直流侧输入电压高且变化范围宽、输出电压稳定且波形质量高，电子部件全密封且要求自然冷却的特点，分析比较了几种大功率逆变器技术方案，选择单边脉宽调制阶梯波合成逆变器为研究对象。 |
| 10. | Multilevel inverter technology is a pop research in high voltage and high - power converting fields . it can synthesize multilevel output with the distribution of dc voltage and the combination of different switching actions to reduce voltage stress across the switches and bulk of the equipment , and lessen output harmonic distortion and switching loss of the inverter
多电平逆变器是当前高压大功率电能变换领域中的研究热点之一,它通过对直流侧的分压和开关动作的不同组合,实现多电平阶梯波输出电压,能有效地减小器件承受的电压应力,缩小装置体积,减小输出电压谐波和开关损耗。 |
