共查询到20条相似文献,搜索用时 15 毫秒
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为了满足一种新能源发电领域的电力电子变换装置上逆变器触发的要求,研制了利用OMAPL138和FPGA实现的多路PWM脉冲发生器。该脉冲发生器利用接口单元接收OMAPL138写入的PWM脉冲占空比和设置参数等数据,利用FPGA产生PWM波形,达到其工作不受OMAPL138影响的效果。同时介绍了脉冲发生器的硬件架构、基本原理和实现方法,并通过仿真和实验得到验证。该PWM发生器既简化了电路的设计,提高了系统的可靠性,又可保证逆变器功率元件触发的同步。 相似文献
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最大功率点跟踪(MPPT)算法是太阳能发电系统常用的控制算法,大多数系统利用微控制单元(MCU)实现.在此利用现场可编程门阵列(FPGA)实现了一种低成本的太阳能MPPT的电路,探讨了系统硬件的组成、各功能部分接口实现的方法.用Verilog语言实现了ADC控制器、乘法器、MPPT算法及PWM波波形发生器.并通过Modelsim平台对设计电路进行了仿真,最后在CycloneⅡ系列EP2C8Q208C8芯片上实现下载.实验结果表明电路工作正常,达到了设计要求,为太阳能发电系统的系统级芯片(SoC)控制打下了基础. 相似文献
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Shuichi Ichikawa Masanori Akinaka Hisashi Hata Ryo Ikeda Hiroshi Yamamoto 《IEEJ Transactions on Electrical and Electronic Engineering》2011,6(4):367-375
Although a programmable logic controller (PLC) has been widely adopted for the sequence control of industrial machinery, its performance does not always satisfy the recent requirements in large and highly responsive systems. With the state‐of‐the‐art field programmable gate array (FPGA) technology, it is possible to implement a control program with hard‐wired logic for higher response and reduced implementation cost/space. This approach is also worthwhile for transmigration of legacy PLC software into forthcoming FPGA‐based control hardware. This study presents a systematic method to implement a hard‐wired sequence control from PLC software. PLC instructions are converted into VHDL codes, and then implemented as logic circuit with various peripheral functions. Productive PLC programs were examined with Mitsubishi Electric FX2N PLC and Altera Stratix II FPGA, and were shown to fit into a common FPGA chip. A straightforward Sequential design was estimated to be 184 times faster than PLC, while a performance‐oriented Flat design was estimated to be 44 times faster than Sequential design (i.e., 8050 times faster than PLC). A practical perfect layer winder system was actually built and successfully operated with our FPGA control board, whose logic design was implemented with our tools. © 2011 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. 相似文献
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Limin Yu Shen Xu Huaxin Zhang Longxing Shi Weifeng Sun 《International Journal of Circuit Theory and Applications》2021,49(1):114-127
High‐resolution pulse width modulators are used widely in different fields of electrical engineering, such as dimming of light‐emitting diode (LED) lighting, motor control, RF modulators, audio amplifiers, and switch‐mode power supplies. To realize a high‐resolution digital pulse‐width modulator (DPWM) in a limited inner system clock, a simple implementation of a hybrid DPWM with the resolution under 50 ps based on a general‐purpose field‐programmable gate array (FPGA) is described. The multiplexer device implementing the fast carry‐chain path and an AND gate controlling the selection input are used as a delay unit. The manual routing or placement is not required in the proposed approach, which just needs some conditional constraints. Some different conditional constraints influencing the monotonicity and resolution of DPWM are discussed. Finally, a 1 MHz switching frequency DPWM with 40 ps resolution is experimentally demonstrated, with high monotonicity and linearity. Further, a synchronous buck with and without this high‐resolution DPWM is experimentally compared to illustrate the regulation resolution. 相似文献
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模块化多电平换流器(MMC)中数以千计的子模块(SM)给控制器计算带来很大负担。海量数据采集、复杂控制计算以及不同控制器间通信等因素导致整个控制链路延时较长,恶化系统动态特性,甚至导致并网后系统不稳定。设计了一种基于现场可编程门阵列(FPGA)的集成控制器,在单块FPGA板卡中实现MMC的全部控制策略。控制器充分发挥FPGA的并行特性,每种控制模块尽可能采用并行设计,并将相互独立的控制模块并行执行,以提高控制器的计算速度。基于RTDS平台进行了硬件在环实验,对所开发控制器进行功能验证。结果表明:所开发控制器链路延时短,响应速度快,可用于控制策略开发测试、控制参数调试等领域。 相似文献
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Colin Yu Lin Ngai Wong Hayden Kwok‐Hay So 《International Journal of Circuit Theory and Applications》2013,41(2):205-219
The design and implementation of a sparse matrix‐matrix multiplication architecture on field‐programmable gate arrays is presented. Performance of the design, in terms of computational latency, as well as the associated power‐delay and energy‐delay tradeoff are studied. Taking advantage of the sparsity of the input matrices, the proposed design allows user‐tunable power‐delay and energy‐delay tradeoffs by employing different number of processing elements (PEs) in the architecture design and different block size in the blocking decomposition. Such ability allows designers to employ different on‐chip computational architecture for different system power‐delay and energy‐delay requirements. It is in contrast to conventional dense matrix‐matrix multiplication architectures that always favor the maximum number of PEs and largest block size. In our implementation, the better energy consumption and power‐delay product favors less PEs and smaller block size for the 90%‐sparsity matrix‐matrix multiplications. Although in order to achieve better energy‐delay product, more PEs and larger block size are preferred. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
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针对小功率应用场合,提出了一种基于现场可编程门阵列(Field Programmable Gate Array,简称FPGA)单向高频链(High Frequency Link,简称HFL)逆变器的设计.设计中采用了DC/DC和DC/AC两级变换形式;控制电路利用了FPGA的强大编程能力和控制能力,使得系统的更新非常灵活,能满足各种情况下的应用.通过仿真和实验结果验证了设计的正确性. 相似文献
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为了精简磁悬浮飞轮控制系统体积和功耗,介绍一种四轴飞轮磁轴承一体化控制系统及其现场可编程门阵列(FPGA)实现.将磁轴承控制器和功率放大器整合到一起,用单片FPGA实现含不平衡补偿的转子位移控制、电流控制以及三电平脉宽调制(PWM)算法.采用分时复用浮点运算IP核的方式实现控制算法.为均衡运算速度和资源消耗,提出一种A/D转换器精确度和浮点IP核数据精确度的选择方法.提出一种增量式算法,仅用乘加单元和查找表即可实现不平衡补偿算法中的三角函数值的在线计算.介绍三电平PWM的FPGA实现方法以及转子位移信号的自动标定方法.实验结果表明,一体化控制器可以达到0~7 000 r/min转速范围内飞轮径向位移不超过保护间隙10%的控制效果.四轴飞轮磁轴承控制任务可以用单片FPGA以小于20万逻辑门的资源消耗实现. 相似文献
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与DSP器件相比,现场可编程门阵列(Field Programmable Gate Array,简称FPGA)能够实现性能更优的数字控制DC/DC变换器.基于FPGA开发平台.研究了数字化DC/DC变换器的实现方法,介绍了电压模式数字控制器各功能模块及系统的状态机实现.实验系统的测试结果表明,采用FPGA实现数字DC/DC具有较好的性能,具体性能指标完全可以满足要求. 相似文献
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基于FPGA的多通道无缝采样分析技术的实现 总被引:1,自引:2,他引:1
提出了基于现场可编程门阵列(FPGA)的多通道无缝采样分析技术的实现方法,采取采样控制时序与数据处理分析控制时序分离,以及两组动态数据存储区的切换控制,由FPGA实现同步产生上述时序。解决了数据采集与处理的异步问题,使两者同步进行,实现了多通道同步无缝采样分析、采样窗口长度可调和通道扩展等功能。另外给出了基于FPGA芯片EPIK30TCl44~3的一些实际运行结果,证明了多通道无缝采样分析技术的可行性。 相似文献
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基于DSP与FPGA的特点,设计开发了全数字无刷直流电动机控制系统。对速度检测电路、驱动电路、保护电路以及人机接口电路等内容进行了阐述。实验结果验证了该设计方案的有效性和可靠性。 相似文献
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回波模拟器主要完成对雷达引信机射频信号的延迟和衰减,并传输至接收端.传统的模拟延时和模拟衰减通常采用多路开关控制延迟线的方法实现,由于模拟电路存在温度漂移、器件老化影响、抗干扰性能差等缺点,从而使得输入信号质量下降,线路越长,噪声的积累也就越多.以现场可编程门阵列Vertex-5系列的FPGA为核心,研究了数字化回波模拟器总体设计方案,综合利用了模数转换、数字下变频DDC、数字延迟衰减等技术,实现了雷达引信机射频信号的延迟衰减精确可调,完成了频率、功率信号的实时测量,简化了回波模拟器硬件结构,提高了系统集成度和可靠性. 相似文献
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