逆電流保護 的英文怎麼說

中文拼音 [nìdiànliúbǎohù]
逆電流保護 英文
reverse current protection
  • 逆 : Ⅰ形容詞1 （方向相反） contrary; counter 2 [數學] inverse; converse Ⅱ動詞1 （抵觸; 不順從） go aga...
  • 電 : Ⅰ名詞1 （有電荷存在和電荷變化的現象） electricity 2 （電報） telegram; cable Ⅱ動詞1 （觸電） give...
  • 流 : Ⅰ動1 （液體移動; 流動） flow 2 （移動不定） drift; move; wander 3 （流傳; 傳播） spread 4 （向壞...
  • 保 : Ⅰ動詞1 （保衛; 保護） defend; protect 2 （保持） keep; preserve; maintain in good condition 3 （...
  • 護 : 動詞1. （保護; 保衛） protect; guard; shield 2. （袒護;包庇） be partial to; shield from censure
  • 電流 : current; galvanic current; electric current; electricity; current flow電流保護裝置 current protec...
  1. From the last century ninetieth, microprocessor relay protection technology has been rapidly developed and widely used in our country. it has become an inevitably flow and trend in the development of relay protection technology. but there are scarce experimental devices of microprocessor relay protection at present in our country and the devices which are being used have the defect of function single, inconvenient, and high cost etc. based on this condition, an experimental and training system for the multifunctional microprocessor relay protection and substation integrated automation is explored and developed in this paper

    從上個世紀九十年代起微機繼電保護技術在我國得到了快速的發展和廣泛的應用並已成為繼電保護技術發展不可逆轉的潮流和趨勢，但是微機保護實驗設備的開發在我國幾乎是一片空白，僅有的微機保護實驗設備也存在著功能單一、體積大、成本高等諸多缺點，基於這一現狀，本文著力研究和開發一種多功能微機保護與變電站綜合自動化實驗培訓系統。
  2. The steady frequency three - phase ac can be changed into the ac which frequency is continuously adjusted in the experiment unit composed of rectifier, inverter, control circuit, and relay safeguard circuit

    Spwm三相變頻實驗單元能夠把頻率固定的三相交流電變換成頻率連續可調的三相交流電，它主要包括交直變換、逆變、控制和繼電保護電路。
  3. In addition, the working principle, characteristics and compensation of the control system of current peak are deeply discussed ; the pwm control circuit of using uc3875 as the core, the inputting over - voltage protecting circuit and owe - voltage protecting circuit are given, etc

    此外，論文還對軟開關逆變器峰值電流控制系統的原理、特性及補償進行了深入的分析；設計了以uc3875為核心的移相pwm控制及輸入過壓、欠壓保護等電路。
  4. The reasons why reverse current protection is not necessary in rectifiers of direct current traction substation are described

    摘要通過分析，闡述了直流牽引變電所內的整流器不必設置逆流保護的理由。
  5. Based on studying of the multi - level technique, a variable frequency speed regulation system based on the diode clamped three - level inverter is introduced in this thesis in detail. it includes ac - dc - ac main power circuit, snubber circuit, isolated driving circuit by optical fibre, delay time circuit on powering, sampling circuit of current and voltage, protection circuit and etc. a distributed power system ( dps ) which can reinforced the system ’ s security is developed to solve the power supply of the whole system

    本文在研究多電平技術的基礎上，研製了一套以二極體箝位式三電平逆變器為基礎的變頻調速系統，包括:交-直-交主功率電路，緩沖電路，光纖隔離驅動電路，上電緩沖延時電路，電流、電壓采樣電路，保護電路等。
  6. The power circuit of the system adopts the voltage frequency conversion structure of ac - dc - ac, and is composed of the commutation circuit, filter circuit and intelligence power module ( pm15rsh120 ). control circuit takes the dsp chip tms320lf2407 as core, including the pwm signal occurrence circuit, detect circuit of stator current and direct current voltage of generatrix, drive circuit of intelligence power module, detect circuit of speed, protect circuit of system etc. all of this builds the full digital vector control system of asynchronous motor

    該系統的功率電路採用電壓型的交-直-交變壓變頻結構，由整流電路、濾波電路及智能功率模塊ipm （ pm15rsh120 ）逆變電路構成;控制電路以dsp晶元tms320lf2407為核心，加上pwm信號發生電路、定子電流檢測電路、直流母線電壓檢測電路、智能功率模塊驅動電路、速度檢測電路、系統保護電路等，構成了功能齊全的異步電機全數字化矢量控制系統。
  7. Current transformers are nonreplaceable in the field of protection and measurement for decades, but the electromagnetic current transformers can not meet the development of the electric power system for the reasons of magnetic saturation, ferro resonance, little dynamic range, narrow service band and so on 。 with the popularization of microcompute, it will be irreversible to apply microcompute in the protection and measurement, the equipments do not need the current transformer with high power, so the rogowski coil can apply on the field of protection and measurement

    電流互感器在繼電保護和電流測量中的作用長期以來具有不可替代的地位，但電磁式電流互感器所固有的磁飽和、鐵磁諧振、動態范圍小、使用頻帶窄等都難以滿足電力系統發展的要求。隨著微機的普及，在繼電保護和測量中應用微機已是不可逆轉的潮流，設備已不再需要高功率輸出的電流互感器，因此可以選用rogowski線圈作為低電壓輸出要求的電流測量和繼電保護應用。
  8. Slave cpu receives the spwm data and output the spwm wave by query the spwm table. the dead time is generated by hardware to prevent the h bridge arm from short directly. the power out module is protected for over current, over voltage and over heat

    逆變器採用雙cpu結構，使用spi進行連接，主cpu完成輸入、輸出和spwm波形數據的計算，從cpu接收到spwm數據后使用查表方法輸出spwm波形，使用硬體電路生成死區時間防止橋臂直通，對輸出功率模塊進行了過流、短路、過壓、過熱保護。
  9. The electrical design of the whole power supply is given in chapter four. the control diagram of rectifier, inverter, and inverter driver and protection circuit are all given here

    第四章里給出了整機的電設計，給出了整流控制框圖，逆變控制框圖，驅動電路的設計和保護電路的設計。
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