波形轉變器 的英文怎麼說
中文拼音 [bōxíngzhuǎnbiànqì]
波形轉變器
英文
wave converter-
Because dead time is compensated at the same time, the output waveform is improved, and output torque is strengthened in low frequency
進行了死區補償,使逆變器在低頻輸出時波形明顯改善,提高了系統在低頻時的轉矩輸出。The ultrasonic motor is a kind of direct driver which is uses the converse piezoelectric effect of the piezoelectricity ceramics, by using transformation and the coupling of each kind of expansion and contraction vibration pattern enlarging the material microscopic distortion by resonate effect and transforming it to macroscopic movement of the rotor or the slide by the friction coupling
超聲波馬達是一種利用壓電陶瓷的逆壓電效應,通過各種伸縮振動模式的轉換與耦合,將材料的微觀變形通過共振放大和摩擦耦合轉換成轉子或者滑塊宏觀運動的直接驅動器。A device for converting energy form one form to another. in relation to computers, the term is applied to a read / write head, to detector of sector marks in a magnetic disc system, and to electronic / sonic pulse converters of delay line memory
把能量從一種形式轉換成另一種形式的裝置。在與計算機有關時,這個術語用在磁盤系統中的讀寫磁頭、扇面標記的檢測上,以及用在延遲線存儲器的電子或聲波脈沖變換器上。This paper include the following parts. firstly the sine exciting - voltage is guaranteed by direct digital synthesize technology ; secondly the digital output of cos ( 9 ) and sin ( 9 ) are generated by microcontroller ; thirdly the two voltage signals which are the product of the two former signals gained by the multiplying d / a converter, being filtered and amplified, have constant frequency, and one amplitude has sine function relationship of with the input angle, and the other amplitude has cosine function relationship of with the input angle ; finally the two signals are acquired and analyzed by relative instrument and software
主要由以下幾部分組成:用數字頻率合成技術( dds )產生正弦激勵電壓信號u _ msin ( t ) ;用單片機產生幅度的數字量輸出sin ( )和cos ( ) ;用乘法型d a轉換器實現激勵電壓和幅度的乘積,並通過濾波器和功放后即得到頻率固定,幅值隨輸入角成正餘弦變化的電壓信號;最後用數據採集卡採集輸出信號,顯示波形並進行頻譜分析。The design and application of ad6640 and ad6624 are fully discussed in this part. the design of software module includes the parameter design for ddc filter and the baseband signal processing of dsp. and the realization of the viterbi channel decoding algorithm by dsp and the simulation of the burst at the transmitter are discussed
模塊的硬體設計主要包括: a d轉換器、數字下變頻器( ddc )以及dsp ,詳盡討論了a d器件ad6640和ddc器件ad6624的設計和應用;模塊的軟體設計主要包括: ddc濾波器參數設計和dsp的基帶信號處理,給出了viterbi通道譯碼演算法dsp實現和發射端突發形成的模擬實現。At this time, the approximate mechanical model of devices has been put forward, which frequency is 70 mhz, then we analyzed the euler ? bernoulli equation, find that the frequency is determined by the resonator ’ s density thickness and length ; the free - free - beam 、 coupled beam 、 support beam 、 transducer have been designed ; the model was simulated and modal analyzed on the coventorware and were consistent with the designed parameter. the silicon surface microfabrication process was developed and emphatically introduced several key surface microfabrication technologies, and was simulated by coventorware
本文通過分析歐拉-貝努立方程,得出濾波器的共振頻率主要由諧振梁的密度、厚度和長度決定,考慮切變形和轉動慣量的情況下,完成微機械諧振梁、支撐梁、驅動電容的設計;在coventorware軟體上進行模擬,分析結果與理論設計比較好地吻合;對微機械濾波器的加工工藝進行設計,給出器件的完整的工藝流程,重點介紹微機械表面加工工藝,並在coventorware上進行模擬。Abstract : in this paper, a principle and method of the speed pulse waveform sampling are introduced. its object is to study an effect of the turning factor on torbulence. test is done in the aerofoil fengwen. on design of the user interface, application of the timer and displaying way of a pape and continuity are specifically discussed. expermental results and analysis is showed at the last
文摘:以翼型風洞為對象,著重介紹了變湍流度對翼型轉捩因子影響的速度脈動波形採集的原理和方法,重點對波形採集系統用戶界面的設計、定時器的應用、分頁顯示和連續顯示等技術進行了具體介紹,並給出了實驗結果及分析。According to the mechanism characteristics of the ac motor, with zero - voltage switching technology, the pdm converter mathematical models both the pwm and rectangular wave control mode are given in this paper. and the voltage and current harmonic analysis and the simulation waveforms of the output voltage, current and power are also described respectively
根據交流電機在恆轉矩區和恆功率區的特性,結合零電壓開關技術,分別給出相應的脈寬調制控制( pwm )方式和方波控制方式下的高頻交流脈沖密度調制變頻器的數學模型,電壓和電流的諧波分析以及輸出電壓、電流和功率的模擬波形。First we collect signals by shake and infrared temperature sensor, transfer them to computer by a / d instrument, dispel zero excursion of sensor and in - linearity of a / d transformation, save them in the form of data file. then transfer them to matlab, analyze and dispose by wavelet function and toolbox. by lot of experiments and data analysis we find distinct change of the character in different fault states
然後,我們在現場對砂光機進行實驗,利用振動及紅外線溫度傳感器現場實時採集信號,通過a / d采樣卡送入計算機中,採用逆向建模的新方法來消除傳感器零漂及a / d轉換的非線性,再以數據文件形式保存,然後在matlab中調用數據文件,應用小波函數及工具箱對其進行處理分析,經過大量的實驗及數據分析發現在不同的故障狀態下,特徵量有明顯變化。The mc controlled by this strategy not only achieves the dtc of asynchronous machine with excellent dynamic performance but also acquires good input currents and an adjustable power factor
按這種策略進行控制的矩陣式變換器,既可實現對異步電機進行動態性能優良的直接轉矩控制,又可獲得良好的輸入電流波形以及可調的功率因數。Finally, the wave equation of the electromagnetic field of this kind damper is derived from the maxwell ' s equation. the magnetic flux density at the boundary is assumed to be harmonic, so the analytical result of the wave equation is solved. when the rotor rotates, eddy currents flowing inside the conducting material field are caused
最後,應用ahrens的電磁軸承簡化模型,從maxwell方程出發推導了應用於本文所述的被動式電磁阻尼器的波動方程,並用傅立葉級數把矩形磁場展開的諧變磁場作為磁場的邊界條件,通過求解波動方程得到磁場的解析解,從而計算了阻尼器對轉子的電磁力和由渦流引起的切向力產生的阻尼器附加功耗。The digital upward frequency conversion is the key element of the waveform synthesis. at the same time, basic theoretical analysis and optimum design are done for pci bus slave interface, fifo, transmit signal processor, digital - to - analog converter and logic control
本文對波形合成技術的核心? ?數字上變頻進行了深入細致的研究和介紹,同時對波形合成器中的pci總線介面、先進先出緩沖器、發射信號處理、數模轉換及邏輯控制等部分進行了分析和優化設計,給出了最佳設計方案。Although dm can also solve the modulation time error, but the output waveforms can ’ t reach the industrial standard ( total harmonic distortion thd ). considering this, a new control strategy called current optimal control ( coc ) is presented in paper. coc is that system samples the output value real time, comparing with expected value, considering all switching actions available then draw a concluding to decide which way would be fastest and best way to render system smooth
針對這一缺點,本文提出了一種更好的控制策略,電流最優delta調制,它是在電流滯環控制的基礎上,根據電路的輸出信號來分析,考慮所有可能的逆變器動作來決定選用哪一種開關轉換方式能最快最平穩地達到預期值,採用的是一種電流預測控制手段,從而使輸出波形的紋波最小。Simulator program is designed and the simulated waveforms of the voltages, currents, speed and torque are shown using this method of svpwm
編制了系統模擬程序,給出svpwm控制,兩相逆變器?異步電動機系統樣機的電壓、電流、轉速、轉矩模擬波形曲。The steady state and transient characteristics of the aceg system are simulated, the harmonics of the emf and stator current and rotor current as well as mc ' s input current are researched. the operation characteristics of aceg with mc as an exciter are compared to those of aceg with ac - dc - ac converter and cycloconverter as an exciter. the results in this thesis will be helpful to the design of the aceg excitation control system
利用所建模型,對交流勵磁發電機系統的穩態調節特性、暫態特性進行了模擬研究;模擬研究了發電機定、轉子電流和感應電勢及變頻器輸入電流波形,並作了相應的諧波分析;與交-直-交變頻器和交-交變頻器作勵磁電源時發電機的運行特性進行了對比分析。分享友人