The idea and frame of this thesis are as follows:Firstly, after Analyzing the characteristics of white LED, it is pointed out that constant current drive is necessary;
本文的研究思路与工作内容如下：首先，论文对白光LED的特性进行了分析，得出其需要恒流源驱动；
This paper proposes an energy saving control mode for current source inverter(CSI) induction motor drive system with the motor driving a constant power load.
本文提出了电流型逆变器-感应电动机变频调速系统中电机驱动恒功率负载时，系统以最大效率运行的节能控制方式。
The trigger PCB consists of two parts, first (upper half of the schematic) the trigger and constant-current LED drive and second (lower half) the PWM motor current controller.
触发电路板由两部分组成，第一（上半部分示意图）的触发和恒定电流LED驱动器和第二届（下半部分）的PWM电动机电流控制器。
Unique circuit design, using high-performance constant-current drive power, thereby achieving a highly efficient energy-saving purposes.
独特电路设计，采用高性能恒流驱动电源，真正达到了高效节能的目的。
A novel method to drive magnetron by constant voltage-constant current technique is proposed.
提出了用恒压-恒流技术驱动磁控管的新方法。
And this paper analyzes the characteristic of white LED, designs constant-current drive circuit, so that guaranteeing the quality of light.
并且对白光led特性进行分析，设计了恒流驱动电路，保证发光质量。
Unique circuit design, using high-performance constant-current drive power, really reached efficient energy-saving.
独特电路设计，采用高性能恒流驱动电源，真正达到了高效节能的目的。
By high performance constant-current drive power reached more than 90%, conversion efficiency than traditional fluorescent lamp province electricity rate reaches above 60%.
采用高性能恒流驱动电源，转换效率大于90%，比传统日光灯省电率达60%以上。
The maximal detection range increases with the reducing duty ratio of the drive current when the transmitted average power is constant.
在平均功率不变的情况下，可以通过减小激励电流的占空比来增加最大探测距离。
When designing the step motor drive circuit of 5 phase 10 pat, 89c2051 is adopted as the Loop allotter. The VMOS is adopted in power elements. It is designed as chopper-type constant current circuit.
设计五相十拍步进电动机驱动电路时选择了89c 2051作为环形分配器，而功率器件选用电压型的VMOS管。
When designing the step motor drive circuit of 5 phase 10 pat, 89c2051 is adopted as the Loop allotter. The VMOS is adopted in power elements. It is designed as chopper-type constant current circuit.
设计五相十拍步进电动机驱动电路时选择了89c 2051作为环形分配器，而功率器件选用电压型的VMOS管。
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