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Description: 显示DIB图片,支持256, 24, 32位颜色.这是一个客户端程序,需要执行,好需要服务器软件-DIB support 256, 24, 32 colors. This is a client need for the implementation, server software needs good
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Size: 771072 |
Author: 陈金源 |
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Description: Servomotors are available as AC or DC motors. Early servomotors were generally DC motors because the only type of control for large currents was through SCRs for many years. As transistors became capable of controlling larger currents and switching the large currents at higher frequencies, the AC servomotor became used more often. Early servomotors were specifically designed for servo amplifiers. Today a class of motors is designed for applica-tions that may use a servo amplifier or a variable-frequency controller, which means that a motor may be used in a servo system in one application, and used in a variable-frequency drive in another application. Some companies also call any closed-loop system that does not use a stepper motor a servo system, so it is possible for a simple AC induction motor that is connected to a velocity controller to be called a servomotor. -Servomotors are available as AC or DC motors. Early servomotors were generally DC motors because the only type of control for large currents was through SCRs for many years. As transistors became capable of controlling larger currents and switching the large currents at higher frequencies, the AC servomotor became used more often. Early servomotors were specifically designed for servo amplifiers. Today a class of motors is designed for applica-tions that may use a servo amplifier or a variable-frequency controller, which means that a motor may be used in a servo system in one application, and used in a variable-frequency drive in another application. Some companies also call any closed-loop system that does not use a stepper motor a servo system, so it is possible for a simple AC induction motor that is connected to a velocity controller to be called a servomotor.
Platform: |
Size: 995328 |
Author: 徐永荣 |
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Description: The main disadvantage of this method is that SCRs are expensive as they must possess low turn-on and turn-off times.
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Size: 345088 |
Author: abd??l |
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Description: The main disadvantage of this method is that SCRs are expensive as they must possess low turn-on and turn-off times.
Platform: |
Size: 21504 |
Author: abd??l |
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Description: file testing for app scr
Platform: |
Size: 194560 |
Author: tmsingh |
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