直接变换 meaning in English
collineation
direct conversion
direct mapping
direct transform
Examples
- There are different ways to make the bit synchronization , for example : the technique of the pilot frequency , the technique of some change about the baseband signal
为了保证在同步传输系统中的位同步,有导频及对基带信号信号直接变换的方式,直接变换的方式中,使用线路编码是比较常见的。 - According to the space vector modulation method of the equivalent structure of the ac - dc - ac transformation , the transformation relations of the matrix converter are deeply investigated . the ac - ac direct conversion control and the double - space - vector pwm scheme of the matrix converter are deduced , the four - step current commutation strategy of matrix converter is expatiated , the design method of input filter and over voltage protection circuit is analyzed , and the modeling and simulation of a three - phase matrix converter are implemented
从等效交-直-交变换的空间矢量调制方法出发，深入分析了矩阵式变频器的变换关系，导出了交-交直接变换控制规律和双空间矢量脉宽调制技术，阐述了矩阵式变频器的换流控制策略，分析了输入滤波器和过电压保护电路的设计方法，实现了矩阵式变频器的建模和运行分析。 - Matrix converter ( mc ) is a power converter based on ac - ac direct conversion . more and more attention is paid to mc depending on its adventages , such as omitting the dc part , obtaining unit power factor , getting sinusoidal input currents and output voltages and easy to realize bidirectional flow of energy
矩阵变换器作为交交直接变换的功率变换器,以其无中间直流环节、具有单位输入功率因数和良好的正弦输入电流、易于实现能量双向流动等优点受到了国内外学者的广泛关注。 - Besides these , it is capable of performing frequency conversion with sinusoidal output voltages and currents at the desired output frequency and allows bi - directional power flow according to the space vector modulation method of the equivalent structure of the ac - dc - ac conversion , the conversion relations of the matrix converter were deeply investigated . the ac - ac direct transformation control and the double - space - vector pwm scheme of the matrix converter were deduced and the modeling , sin ~ iu1ation and experiment of a three - phase matrix converter were implemented
本文从等效交一直一交变换的空间矢量调制方法出发，深入分析了矩阵式变换器的变换关系，推导出了交一交直接变换控制规律和双空间矢量pwm调制技术，实现了交一交直接变换控制方式下矩阵式变换器的建模和运行分析，并进行了计算机仿真和实验研究。