【正文】 ?Automatic/manual unlocking: choose the Automatic/manual mode to perform threephase voltage poweron, the load currents test and the unlocking power supply poweron。?? One channel of district of coulomb (DC for short) unlocking power supply, with the fixed varying rate。圖5 測試結(jié)果的正弦跟蹤 結(jié)論 在被用于某些導(dǎo)彈半實物仿真系統(tǒng)和性能評價兩年多來,證明數(shù)字電源系統(tǒng)具有良好的穩(wěn)定性和可操作性,提供所需的輸出功率和會合所需要的穩(wěn)定頻率,幅值,相位和低諧波失真。操作員可以控制遠(yuǎn)程計算機(jī)執(zhí)行所有的功能包含在主機(jī)電腦上預(yù)定的指令。供應(yīng)的交流反饋電壓必須提前完成測試,然后解鎖固定提高電力供應(yīng)的利用率。在所有的命令中，數(shù)據(jù)收集是由軟件定時實現(xiàn)，其他命令來實現(xiàn)相應(yīng)的功能轉(zhuǎn)移。該芯片不斷收到客人電腦的指令(頻率振幅值)并且隨時間輸出相應(yīng)的電壓值。指令之間的溝通信實現(xiàn)主機(jī)和分機(jī)預(yù)定協(xié)議。該系統(tǒng)可以在半實物仿真系統(tǒng)的集成,實現(xiàn)測試參數(shù)管理、自動接通電源的進(jìn)入和圖表的數(shù)據(jù)顯示。 介紹 應(yīng)用程序環(huán)境的現(xiàn)代導(dǎo)彈系統(tǒng)越來越復(fù)雜，控制精度要求非常嚴(yán)格[1]。te GmbH amp。 power supply is directly obtained from TA installed in the highvoltage line. The conception, to take power from the TA as power supply unit of work loop and operation, is the innovation of selfpowered digital relay. The appearance of the digital selfpowered overcurrent relay show in . Some researchers have raised a variety of power supply means, such as solar energy with lithium battery power, laser power, microwave power, and online access to energy use special TA, etc[24]. Of this total, the way of special TA installed in highvoltage side give online access to power electronic circuits is the most promising power supply. However, there are some issues to be solved about this power supply method, mainly including[5]: (1) How to ensure stable part of the voltage for electronic circuit when primary current (1) changes in a larger range(1%~120%I). This is currently an urgent problem need to solve。參考文獻(xiàn)[1] . Digital selfpowered Overcurrent Relay[EB/OL]. Schaltanlagen Elektronik Ger228。然而,困難在于在總線電流是缺乏情況下其動態(tài)范圍是適應(yīng)變化的。通過電路設(shè)計,當(dāng)任何一個電壓值高于參考電壓,MOSFET將打開。,、12v,15v。讓這個設(shè)計值作為替代,1500 2 N≈(轉(zhuǎn))。此外,體積和重量的核心應(yīng)該是最小化到可能的前提下,滿足所需能源后端電路。不僅保證了電容器的額定電壓并且也獲得一個穩(wěn)定的電壓輸入對于調(diào)節(jié)器?；镜墓ぷ髟砣缦?使用一個特殊的電流互感器誘導(dǎo)三相一側(cè)的總線,然后信號通過整流電路處理。(3)這個問題的核心，飽和線圈。電源是從TA直接獲取安裝在高壓線路上。 關(guān)鍵字自動提供電源。它的電源的工作和操作電路要求變電站或配電間提供交流或直流電源。這種方法可以避免飽和問題的核心圈當(dāng)一次電流變化在一個更大的范圍內(nèi)通過增加空氣差距在核心圈和引入氣隙磁阻。如果沒有權(quán)力在現(xiàn)場,繼電保護(hù)設(shè)備不可以工作。然而,有一些問題需要解決關(guān)于這個權(quán)力供應(yīng)方法,主要包括[5]:(1)當(dāng)一次電流在較大的范圍內(nèi)變化(1% ~ 120%)如何確保對電子電路穩(wěn)定部分的電壓。沒有死區(qū)當(dāng)天24小時內(nèi),這使得電源模塊已廣泛應(yīng)用。如果電容器的端電壓超過它的額定電壓電容器將損壞。 比較應(yīng)用程序和各種性能指標(biāo)不同的磁性材料,我們選擇H9硅鋼。由于其相對磁導(dǎo)率為1,效果是一樣的氣隙。所以它可以保證無論任何一階段儲能電容器充電整流器傳導(dǎo)電流,是滿足電力需求。C、半導(dǎo)體場效應(yīng)晶體管控制電路 為了防止電容器作為電容器端使電流信號繼續(xù)充電，導(dǎo)致電壓超過它額定電壓,并且獲得穩(wěn)定的調(diào)節(jié)器的輸入電壓,本設(shè)計介紹了一個MOSFET控制開關(guān)電路。五、結(jié)論 電源使用的優(yōu)點是電流互感器結(jié)構(gòu)簡單,成本低。 解決的電源采用了浮動電力,其中涉及到電流的大小,而不是電壓水平。 airgap reluctance。 the loss of core is small, increasing the efficiency of energy transfer. According to the materials above, the core air gap is increased to reduce the entire magnetic circuit reluctance and highperformance core material is selected. Furthermore, the volume and weight of core should be minimized as far as possible under the premise of meeting the power required by the backend circuit. The internal diameter of selected silicon steel core d = 55mm, the external diameter D = 95mm, height h= 20mm, saturation magnetic flux density Bs=, then, the average magnetic circuit length l =π (d + D) / 2 = . If the length of core airgapδ =1mm , and then the relative magnetic permeability of the core increased the gap is equivalent to ≈ eq μ , magnetic permeability is greatly reduced. At this point, excitation current value caused core saturation I max ≈ μ , effective value of current is 1016A, which shows that the core will not be saturated when the wire currents are within the 1016A after using this structure. In fact, in order to fix air gap conveniently, the two thick nonmagnetic material is padded in the middle of two Cshaped core. Due to its relative permeability is about 1, the effect is the same as the air gap. In the noload conditions, when the conductor effective current I1=40A, in order to obtain the 9V valid voltage from the secondary coil, there are: Where, U2 is the secondary side voltage, f is current frequency, N2 is the number of secondary side coil turns, Bm is the amplitude of magnetic flux density, Seq is the effective crosssectional area of core, λ is core lamination factor, 0 μ is the vacuum magnetic permeability.Order was: In the circumstances that the core structure and the length of air gap are determined, the right of equation (2) is about equal to a constant. Take in the design value as substitution, 1500 2 N ≈ (turns). Select enameled wire with steel heart, carrier density is calculated according to 8A/mm2, the crosssectional area of wire is demanded , corresponding to a diameter of . Take into account a certain margin, the final choice is wire with copperheart diameter.IV. SOME KEY TECHNOLOGIESA. Signal Acquisition and Charging Circuit The threephase AC current signal, sensed from primary side bus by current transformer, first passes through the controlled bridge rectifier circuit. The AC signal is changed into DC current signal, which is then converted to voltage signal by the resistor R. This voltage signal can be used as the input of sampling signal, can also charge energy storagecapacitor. Singlephase controlled bridge rectifier circuit and charging circuit shown in . The output of threephase rectifier circuit are connected together in parallel, so it can guarantee that the energy storage capacitor is charged regardless any one phase rectifier conduction current on, that is to meet the power requirements.Figure 2 Singlephase controlled bridge rectifier circuit and charging circuitB. Voltage Regulator Circuit LM2576 voltage regulator is used in voltage regulator circuit, shown in . Series of switching regulator LM2576 is a monolithic integrated circuit, suitable for stepdown switching regulator, can drive load. Its fixedoutput voltage is , , 12V, 15V. Power consumption ofLM2576 is very low, only a small size additional heat sink is needed.Figure 3 Voltage Regulator circuit LM2576’s maximum allowable input voltage is 40V, so as to achieve a stable DC voltage output. In the design, the regulator inpu