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Wherever possible the overall technique used for this series will be "definition by example" withgeneric formulae included for use in other applications. To make stability analysis easy we will usemore than one tool from our toolbox with data sheet information, tricks, rules-of-thumb, SPICESimulation, and real-world testing all accelerating our design of stable operational amplifier (op amp)circuits. These tools are specifically targeted at voltage feedback op amps with unity-gain bandwidths<20 MHz, although many of the techniques are applicable to any voltage feedback op amp. 20 MHz ischosen because as we increase to higher bandwidth circuits there are other major factors in closing theloop: such as parasitic capacitances on PCBs, parasitic inductances in capacitors, parasitic inductancesand capacitances in resistors, etc. Most of the rules-of-thumb and techniques were developed not justfrom theory but from the actual building of real-world circuits with op amps <20 MHz.
標(biāo)簽：
運(yùn)算放大器
上傳時(shí)間：
2021-11-01
上傳用戶：
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ADC模數(shù)轉(zhuǎn)換器件Altium Designer AD原理圖庫(kù)元件庫(kù)SV text has been written to file : 4.4 - ADC模數(shù)轉(zhuǎn)換器件.csvLibrary Component Count : 29Name Description----------------------------------------------------------------------------------------------------ADC0800 National 8-Bit Analog to Digital ConverterADC0809 ADC0831 ADCADC0832 ADC8 Generic 8-Bit A/D ConverterCLC532 High-Speed 2:1 Analog MultiplexerCS5511 National 16-Bit Analog to Digital ConverterDAC8 Generic 8-Bit D/A ConverterEL1501 Differential line Driver/ReceiverEL2082 Current-Mode MultiplierEL4083 Current Mode Four Quadrant MultiplierEL4089 DC Restored Video AmplifierEL4094 Video Gain Control/FaderEL4095 Video Gain Contol/Fader/MultiplexerICL7106 LMC6953_NSC PCI Local Bus Power SupervisorMAX4147 300MHz, Low-Power, High-Output-Current, Differential Line DriverMAX4158 350MHz 2-Channel Video Multiplexer-AmplifierMAX4159 350MHz 2-Channel Video Multiplexer-AmplifierMAX4258 250MHz, 2-Channel Video Multiplexer-AmplifierMAX4259 250MHz 2-Channel Video Multiplexer-AmplifierMAX951 Ultra-Low-Power, Single-Supply Op Amp + Comparator + ReferenceMAX952 Ultra-Low-Power, Single-Supply Op Amp + Comparator + ReferenceMC1496 Balanced Modulator/DemodulatorPLL100k Generic Phase Locked LoopPLL10k Generic Phase Locked LoopPLL5k Generic Phase Locked LoopPLLx Generic Phase Locked Loop水位計(jì)
標(biāo)簽：
adc
模數(shù)轉(zhuǎn)換
altium designer
上傳時(shí)間：
2022-03-13
上傳用戶：
-
HX711_1Kg#include "HX711.h"float Weight = 0;void setup(){ Init_Hx711(); //初始化HX711模塊連接的IO設(shè)置 Serial.begin(9600); Serial.print("Welcome to use!\n"); delay(3000); Get_Maopi(); //獲取毛皮}void loop(){ Weight = Get_Weight(); //計(jì)算放在傳感器上的重物重量 Serial.print(float(Weight/1000),3); //串口顯示重量 Serial.print(" kg\n"); //顯示單位 Serial.print("\n"); //顯示單位 delay(1000); //延時(shí)1s}
標(biāo)簽：
arduino
電子秤
上傳時(shí)間：
2022-03-20
上傳用戶：
-
本設(shè)計(jì)介紹了一種基于STM32單片機(jī)控制的智能水杯,可利用插口式電源或無(wú)線充電底座為加熱器提供能量,并在達(dá)到某種飲品所需溫度時(shí)進(jìn)行保溫。水杯內(nèi)置充電電池,可選用USB接口或無(wú)線充電。在水杯內(nèi)部設(shè)置無(wú)線模塊,用戶利用手機(jī)App與水杯進(jìn)行匹配進(jìn)行加熱操作,加熱完后水杯會(huì)通過(guò)手機(jī)App和液晶顯示屏實(shí)時(shí)反饋液體溫度,通過(guò)指示燈顯示電量情況等,給用戶進(jìn)行提醒。該智能水杯設(shè)計(jì)創(chuàng)新,實(shí)用價(jià)值較高。This paper introduces an intelligent water cup based by STM32 microcontroller,it can provide energy for the heater by socket type power supply or wireless charging base,and hold temperature needed for some kind of drink.Builtedin rechargeable battery,water cup can use USB or wireless charging.The wireless module is set up inside it,and customers can use mobile App to match and heat.After heating,water cup feeds back liquid temperature through the mobile App,and then displays on LCD,reminds users through the indicator light.The intelligent water cup is designed innovatively and has high practical value.
標(biāo)簽：
stm32
單片機(jī)
上傳時(shí)間：
2022-03-28
上傳用戶：
-
主要內(nèi)容介紹 Allegro 如何載入 Netlist，進(jìn)而認(rèn)識(shí)新式轉(zhuǎn)法和舊式轉(zhuǎn)法有何不同及優(yōu)缺點(diǎn)的分析，透過(guò)本章學(xué)習(xí)可以對(duì) Allegro 和 Capture 之間的互動(dòng)關(guān)係，同時(shí)也能體驗(yàn)出 Allegro 和 Capture 同步變更屬性等強(qiáng)大功能。Netlist 是連接線路圖和 Allegro Layout 圖檔的橋樑。在這裏所介紹的 Netlist 資料的轉(zhuǎn)入動(dòng)作只是針對(duì)由 Capture（線路圖部分）產(chǎn)生的 Netlist 轉(zhuǎn)入 Allegro（Layout部分）1． 在 OrCAD Capture 中設(shè)計(jì)好線路圖。2． 然後由 OrCAD Capture 產(chǎn)生 Netlist（annotate 是在進(jìn)行線路圖根據(jù)第五步產(chǎn)生的資料進(jìn)行編改）。 3． 把產(chǎn)生的 Netlist 轉(zhuǎn)入 Allegro（layout 工作系統(tǒng)）。 4． 在 Allegro 中進(jìn)行 PCB 的 layout。 5． 把在 Allegro 中產(chǎn)生的 back annotate（Logic）轉(zhuǎn)出（在實(shí)際 layout 時(shí)可能對(duì)原有的 Netlist 有改動(dòng)過(guò)），並轉(zhuǎn)入 OrCAD Capture 裏進(jìn)行回編。
標(biāo)簽：
cadence
allegro
上傳時(shí)間：
2022-04-28
上傳用戶：kingwide
-
以STM32F103C8T6為核心,設(shè)計(jì)了無(wú)刷直流電機(jī)控制器硬件電路。電路主要包括IR2310構(gòu)成的PWM驅(qū)動(dòng)電路、IRF3808構(gòu)成的逆變電路、增量式旋轉(zhuǎn)編碼構(gòu)成的速度反饋電路。控制器具有CAN和RS232通信接口,可與計(jì)算機(jī)或PLC構(gòu)成速度或位置伺服系統(tǒng)。利用由xPC目標(biāo)搭建的半實(shí)物仿真平臺(tái)對(duì)PI參數(shù)進(jìn)行整定。測(cè)試了控制器的速度伺服響應(yīng)性能,給定速度為2400rpm時(shí),控制器響應(yīng)時(shí)間為0.32s。實(shí)驗(yàn)結(jié)果表明,系統(tǒng)工作可靠,穩(wěn)定性好,響應(yīng)速度快,可以滿足上肢康復(fù)機(jī)器人的機(jī)械臂速度控制性能要求。The hardware circuit of Brushless DC motor controller is designed by taking STM32F103C8T6 as the core,which mainly includes PWM driving circuits made up of IR2310,inverter circuit formed by IRF3808,speed feedback circuit composed of incremental rotary encoder and so on.Speed servo control system or position servo control system can be composed of BLDM controller with computer or PLC through CAN communication interface or RS232 serial communication interface.By using the hardware in the loop simulation platform built by xPC target,the PI parameters are set up.The Speed servo response performance of the controller is tested.When the speed is 2 400 rpm,the response time of the controller is 0...
標(biāo)簽：
stm32
無(wú)刷直流電機(jī)
上傳時(shí)間：
2022-05-07
上傳用戶：
-
基于TMS320F28035芯片為控制核心的空間矢量異步電機(jī)變頻器 我們?cè)O(shè)計(jì)的異步電機(jī)變頻調(diào)速器以TMS320F28035芯片為控制核心，通過(guò)輸出三相PWM波控制智能功率模塊IPM驅(qū)動(dòng)三相異步電機(jī)。我們使用空間矢量SVPWM算法，并對(duì)其進(jìn)行了優(yōu)化。采用檢測(cè)反電勢(shì)的方法省去了昂貴的光電編碼器，大大節(jié)省了成本。同時(shí)開(kāi)創(chuàng)性的研發(fā)了自動(dòng)根據(jù)運(yùn)行環(huán)境調(diào)節(jié)的自適應(yīng)變頻算法，使我們的變頻調(diào)速器可以在電網(wǎng)條件惡劣的鄉(xiāng)村山區(qū)工作，由此該變頻器已被一家民用水泵生產(chǎn)企業(yè)預(yù)訂。關(guān)鍵字 變頻器 TMS320f28035 IPM SVPWM In our design, the asynchronous machine inverter based on the chip of TMS320F28035 drives the three-Phase asynchronous machine by sending three-phase PWM waves to the IPM, which is short for the Intelligent-Power-Module. The SVPWM (space vector pulse width modulation) strategy is applied to our control algorithm and we optimize it mainly in two aspects. Firstly the inverter detects the speed by measuring the Back EMF instead of installing an expensive photoelectric encoder for costs reduction.
標(biāo)簽：
tms320f28035
芯片
上傳時(shí)間：
2022-05-08
上傳用戶：zhanglei193
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PFC基礎(chǔ)知識(shí)-PF的定義1功率因數(shù)（Power Factor）的定義是指輸入有功功率（p）和視在功率（S）的比值；線性電路功率因數(shù)可用Cos表示，為正弦電流與正弦電壓的相位差；但是由于整流電路中二極管的非線性，導(dǎo)致輸入電流為嚴(yán)重的非正弦波形，用cosp已不能表示整流電路的功率因數(shù)；常規(guī)直接整流電路的濾波電容使輸出電壓平滑，但卻使輸入電流變?yōu)榧饷}沖，并產(chǎn)生高次諧波分量。輸入電流波形變，導(dǎo)致功率因數(shù)下降，污染電網(wǎng)，甚至造成電子設(shè)備損壞。引入功率因數(shù)校正是必要的利用功率因數(shù)校正技術(shù)可A/全跟蹤交流輸入電壓波形，流輸入電流波形完使輸入電流波形皇純正弦波，并且與輸入電壓波形相位，，此時(shí)整流器的貨載可等效為純電阻。根據(jù)常用功率因數(shù)校正方法可分為有源功率因數(shù)校正（APFC）技術(shù)與無(wú)源功率因數(shù)校正（PPFC）技術(shù)。它置于橋式整流器與濾波用電解電容器之間，實(shí)際上是一種DC-DC變換器。無(wú)源功率因數(shù)校正是利用電感和電容組成濾波器，對(duì)輸入電容進(jìn)行移相和整形。有源功率因數(shù)校正（APFC：Active Power Factor Correction），在負(fù)載即電力電子裝置本身的整流器和濾波電容之間增加一個(gè)功率變換電路，將整流器的輸入電流校正成為與電網(wǎng)電壓同相位的正弦波，消除了諧波和無(wú)功電流，因而將電網(wǎng)功率因數(shù)提高到近似為1.APFC電路常用拓?fù)洌荷龎菏剑˙oost）降壓式（Buck）升/降壓式（Buck/Boost）反激式（Fly back）APFC電路形式：?jiǎn)螛O式 雙極式單相PFC 三相PFCBoost變換電路是有源功率因數(shù)校正器主回路拓?fù)涞臉O好選擇。優(yōu)點(diǎn)：輸入電流連續(xù)，因而產(chǎn)生低的傳導(dǎo)噪聲和最好的輸入電流波形；缺點(diǎn)：需要比輸入峰值電壓還要高的輸出電壓。
標(biāo)簽：
pfc
上傳時(shí)間：
2022-05-28
上傳用戶：
-
RX-8801 SA Features built-in 32.768 kHz DTCXO, High Stability Supports l'C-Bus's high speed mode (400 kHz)Alarm interrupt function for day, date, hour, and minute settings Fixed-cycle timer interrupt function Time update interrupt function32.768 kHz output with OE function Auto correction of leap years Wide interface voltage range: 2.2 V to 5.5 V Wide time-keeping voltage range:1.8 V to 5.5 V Low current consumption: 0.84A/3V (Typ.)is an IC bus interface-compliant real-time clock which includes a 32.768 kHz DTCXO In addition to providing a calendar (year, month, date, day, hour, minute, second) function and a clock counter function, this module provides an abundance of other functions including an alarm function, fixed-cycle timer unction, time update interrupt function, and 32.768 kHz output function.The devices in this module are fabricated via a C-MOS process for low current consumption, which enables ong-term battery back-up.
標(biāo)簽：
時(shí)鐘芯片
rx8025t
上傳時(shí)間：
2022-06-17
上傳用戶：
-
Abstract: A sliding mode observer and fractional-order phase-locked loop (FO-PLL) method is proposed for the sensorless speed control of a permanent magnet synchronous motor (PMSM).The saturation function is adopted in order to reduce the chattering phenomenon caused by the sliding mode observer. In this proposed FO-PLL, method, a regulable fractional order r is involved, which means that the FO-PLL provides an extra degree of freedom. In fact, the conventional phase-locked loop (PLL) applied in sensorless PMSM control can be seen as a special case of the proposed FO-PLL. By selecting a proper fractional order r a better performance may be achieved. The computer simulation results demonstrate the effectiveness of the proposed method.Key words: fractional calculus; fractional order phase-locked loop; sensorless control; sliding mode observer; permanent magnet synchronous motor; speed controll
標(biāo)簽：
滑模觀測(cè)器
傳感器
pmsm
矢量控制
上傳時(shí)間：
2022-06-18
上傳用戶：
