共查询到10条相似文献,搜索用时 78 毫秒
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在DC/DC转换芯片中,为了保证功率开关管及时导通和截止,需要设计专门的驱动电路。本文设计了同步整流驱动电路,通过引入负跳沿延时单元,消除了CMOS瞬态短路导通现象,降低了功耗,保护了输出级。HSPICE仿萁表明,驱动电路延时小于14ns,能满足较高开关频率的要求;同时,开关转换时的尖峰电流减小了56%,功耗也降低了19.3%。 相似文献
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Tobias Bonwetsch 《Nexus Network Journal》2012,14(3):483-494
Over the last couple of years industrial robots have increasingly gained the interest of architects and designers. Robotics in architecture and construction has mainly been looked at from an engineering perspective during the latter half of the twentieth century, with the main purpose of automating the building process. Today the focus has turned towards realizing non-standardized designs and developing custom fabrication processes. However, the specific characteristics of the robot, which distinguish it from common computer numerically controlled machines, are often overlooked. Industrial robots are universal fabrication machines that lend themselves especially well to assembly tasks. Applied to architecture this resolves to the ability to control and manipulate the building process. As such, applying industrial robots emphasizes construction as an integral part of architectural design. Moreover, designing and manipulating robotic assembly processes can become a driver in architectural design. The potential of such an approach is discussed on the basis of several design experiments that illustrate that by applying such methods, form is not derived from computation or geometry, but from a physical process. 相似文献
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基于CPLD的直流电动机PWM驱动器设计 总被引:5,自引:1,他引:4
介绍了一种基于CPLD(Complex Programmable Logic Device)的直流电动机:PWM(脉宽调制)驱动器的设计方案,其实现了电动机转速的精确控制。该驱动器方案设计思路新颖,具有体积小、成本低、简单灵活、现场可编程等优点。该方案应用在机器人驱动系统上,得到了非常令人满意的效果。 相似文献
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无刷直流电机直接转矩控制系统的设计 总被引:2,自引:0,他引:2
针对无刷直流电机直接转矩控制系统速度环节存在的非线性饱和特性,引用新型变结构抗饱和Anti-windup PI控制器,根据控制器的输出是否饱和,对积分状态进行控制。当控制器进入饱和状态,通过调节可以有效地退出饱和;当控制器处于线性区,保证系统渐进稳定。同时利用模糊理论对控制参数进行在线调整,使系统具有更好的实时性。仿真表明,该方法能够有效地抑制饱和现象,减少超调量,使系统具有更好的动静态性能。 相似文献
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本文介绍了TMS320LF2407数字信号处理器的结构特点以及三相桥式全控整流电路原理及基于此电路直流驱动器的实现方法,给出了基于DSP的三相桥式全控整流电路的控制方法。 相似文献