程控任意波形功率電源的研究

　　采用了以單片機(jī)為核心，應(yīng)用大規(guī)模集成邏輯器件FPGA、高速D/A轉(zhuǎn)換器MAX5885和功率放大電路的方案設(shè)計(jì)了一款任意波形功率驅(qū)動(dòng)電源。系統(tǒng)由單片機(jī)控制各個(gè)模塊，頻率合成電路合成所需的不同頻率的時(shí)鐘作為控制地址計(jì)數(shù)器的時(shí)鐘信號(hào)，而地址計(jì)數(shù)器的計(jì)數(shù)輸出提供讀取存儲(chǔ)的數(shù)字波形數(shù)據(jù)的地址，數(shù)據(jù)經(jīng)數(shù)模轉(zhuǎn)換為模擬信號(hào)并經(jīng)過(guò)功率放大后輸出。該電源可以雙路輸出1 Hz~1 MHz頻率范圍內(nèi)幅度、頻率和相位可調(diào)的任意波形，同時(shí)將輸出信號(hào)進(jìn)行功率放大以達(dá)到有效驅(qū)動(dòng)負(fù)載的目的。測(cè)試結(jié)果表明，該電源在最大輸出電流為2 A時(shí)最大輸出功率為200 W。

　　Abstract:

　　This paper is the description of the design of an arbitrary wave generator based on microcomputer chip while large-scale-integration Field Programmable Gate Array(FPGA) chips were applied as well as high speed digital-to-analog converter of MAX5885 and amplifying circuit contained.The microcomputer served as a controller which coordinated relative module synthesizing different frequencies that manoeuvred an address-counter and then accessed all kinds of data stored in advance in memory shortly after the data were converted to analog signal amplified to put out. The generator has two channels,which enable the double outputting signals of frequency ranged from 1Hz to 1MHz respectively available ,simultaneously the amplitude and frequency and phase of these signals can be controlled before they were magnified efficiently with the purpose of driving partially demanded loads eventually.The test turnes out that the maximum output power can come to 200W when the maximum supply-current reaches to 2A.