utility circuit 中文意思是什麼
utility circuit
解釋
生活用電電路-
High - qualified designers and engineers of chaowei are able to provide various high - qualified design services such as ic software program, circuit board, product appearance, products structure, and product package, etc. the factories directly under chaowei have advanced production abilities including mould making, inection moulding, surface spray - painting, silk - screening, shift - screening, smt, welding and assembling, quartz clock core production, and quality check and assurance. chaowei held many design patents and utility model patents, at the same time, national clock and watch quality certification, national technical supervision bureau certification, usa fcc and astm security authentication, canada ic, and euro ce are achieved, the rich experience in oem and odm can ensure high quality products and professional service
超維公司擁有一批高素質的專業設計師和工程師，有能力為國內外客戶提供包括ic軟體編程線路板設計產品外觀設計產品結構設計產品包裝設計等多方面高水準的設計服務超維的直屬工廠則擁有模具製造注塑成型表面噴漆絲印移印smt焊接裝配石英鐘機芯製造品質檢驗測試等先進的生產能力超維公司的產品擁有大量的外觀設計專利和實用新型專利，同時獲得了國家鐘表質量檢驗中心的合格證書國家技術監督局檢驗合格證書美國fcc認證和astm安全認證加拿大ic認證歐盟ce認證。 -
First, variable speed constant frequency wind energy convertion theory is described in this paper, then presents a review on the development of wind turbines control and the main types of generator and static converters used to interface variable speed wind turbines to the electric grid. then discuss main circuit constructure and advantage of direct drive wind energy conversion system and introduce pitch - control method for wind power traction and electric power stability. simply aerodynamic characteristic of the turbine is analysised and permanent magnet synchnonous generator math model is established. to convert the variable frequency electricity into utility grid, back to back four - quadrant pwm - vsi is used and three typies of control strategy is presented to capture the maximum wind energy and transmit energy. then simulation is implemented to test the control strategy. in the following chapter a simple ac - dc - ac converter with a dc - dc boosting chopper is proposed to transmit the wind energy into electricity energy and two control strategy is presented
建立了永磁電機和變流器的數學模型，針對雙pwm變頻器的特點提出了三種控制策略對變流器進行控制，通過變流器交-直-交的變換，將發電機發出的變頻變幅值交流電轉化為可用的恆定頻率的交流電，通過pwm調治能使其輸出功率因數為一，並且該控制系統功率因數為可調，能在特殊情況下同電網交換一定的無功功率，並通過對變流器的控制實現了最大風能俘獲的功能。最後採用matlab / simulink進行了模擬，取得了良好的模擬效果。在風力發電系統中，採用先進的最大功率俘獲演算法，能有效的從風中獲得最大的能量。 -
In the masking film field, the neosepa series is widely recognized for its utility in electrical circuit use and optical part use
遮蔽形膠帶，適用於電子電路，光學部件等，在各業界得到了認可。 -
This paper projects a utility subdividing drive system of step motor, which consists of digital control module, drive module and power module, it uses at89c52 single chip processor as the core, it realizes the external event or generates control signal by i / o interface, timer and external interruption, the system introduce pld device and isp technology to the design of phase sequencer, it simplified circuit and improved the anti - disturbing capability by using abel - hdl language, this system can realizes data memory, velocity digital control and led display, etc. this paper adopted firstly the single - chip technique to design control system, which replaced old complicated logic control circuit and simplified test process
本文研究了一種實用的步進電機細分驅動系統，由數字控制模塊、驅動模塊和電源模塊組成，系統以at89c52單片機為核心，通過單片機的i o口、定時器計數器中斷來實現外部事件監控以及控制信號的產生，系統將可編程邏輯器件（ pld ）器件和在系統編程（ isp ）新技術引入到細分驅動環行分配器的設計，通過abel _ hdl語言編程實現硬體軟化設計和邏輯重構，大大簡化了電路，並提高了電路抗干擾能力。使系統實現參數存儲，速度數字控制，數碼顯示，進退刀控制等功能。 -
Two utility circuit of photoelectric couplings
光電耦合器的兩種實用電路
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