three-phase unit 中文意思是什麼
three-phase unit
解釋
三相機-
The device mainly consists of integrated phase - shift trigger unit, detection unit, amplification and impedance conversion unit, the smallest excitation limitation unit, reactive regulation unit and three - phase controlled bridge rectifier
本裝置主要包括集成移相觸發單元、檢測單元、放大及阻抗變換單元、最小勵磁限制單元、無功調查單元和三相全控橋。 -
The theories and design principles of each circuit of the spwm three - phase frequency inverter experiment unit are in detail introduced in this thesis. at the same time some experiment results are shown that include the output voltage and current waves when the load is in resistivity, inductivity or asynchronous motor
文中詳細介紹了spwm三相變頻實驗單元所包含的各電路環節的理論基礎及設計過程，並給出了調試結果，如負載為阻性、感性和異步電動機時，實驗單元輸出的電壓和電流波形。 -
The paper introduced a phase range system based on fpga embedded technology. three functional module in the range system : modulability signal generation source, information control unit and information management unit, can be designed in one pld chip, so a majority of shortcomings of traditional phase laser range were conquered by this excellent innovation in circuits
本文介紹了一種基於fpga嵌入式技術的相位激光測距系統，該系統採用先進的fpga技術，實現了調制信號產生、信息控制與處理各模塊的整合，解決了傳統相位激光測距所難以克服的弱點。 -
The sa9904b, produced by sames company, is a three phase bi - directional energy / power chip and completes the measurement of rms voltage, rms current, powe, energy, power factor and frequency as the kernel of detecting unit
本系統採用sames公司的三相雙向電能功率晶元sa9904b作為測量單元的核心來完成電壓、電流、功率、電能、功率因數和頻率的測量。 -
Based on comparison of several motor candidates, doubly salient permanent magnet ( dspm ) motor is a good choice for it ’ s outstanding performance. similar to conventional drive system, dspm brushless dc motor ( dspm - bldcm ) is composed of dspm motor and it ’ s controller. the controller is made up of three - phase full - bridge inverter, driver, dsp control unit and etc. for high power system, every switch of three - phase inverter is actually made up of four mosfets in parallel
在充分考慮國內外不同的液壓泵電動機的基礎上，本文選用了雙凸極永磁電機作為整個系統的電機本體，並配以電動機控制器（控制器包括三相橋式功率變換器、驅動電路、 dsp主控單元、電流采樣及預處理和位置采樣及預處理等主要部分）組成整個液壓泵電動機系統。 -
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。 -
The operational characteristic of beam pumping unit is introduced, beam pumping unit is running, the cause changing three - phase asynchronous motor as a generator is also analyzed in detail
介紹了游梁式抽油機的工作特性，詳細分析了抽油機運行時三相異步電機產生「倒發電」現象的原因。 -
In the system, control unit accomplishes back - emf zero - crossing information reading and closed loop commutation. the system eliminates the pwm interferences and the commutating interferences by filtering with software algorithm. in order to make the bldc commutate exactly, the method of three - point estimation is used for phase locking in the system. the system also accomplishes several important objects, such as tmppt of photovoltaic arrays, unmanned supervision of the system, fault detection etc. the results of the experiment show that the device, which is made on the base of the principle above, can control the motor to complete the exact commutation
系統以motorola單片機jl3為核心，完成了系統外圍硬體電路和控制軟體設計，實現了直流無刷電機反電勢過零檢測，利用軟體濾波的方式消除了pwm波干擾及換相干擾；採用三點預估演算法，進行相位鎖定，以完成直流無刷電機準確換相；同時實現了光伏陣列工作點的tmppt跟蹤、系統無人監控和故障檢測等功能。
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