【正文】 etermination of CurrentPower supply current is generally based on the output phase current drive I to determine. If a linear power supply, power supply current is generally preferable to times the I。山 東 建 筑 大 學(xué) 畢 業(yè) 設(shè) 計(jì) 外 文 文 獻(xiàn) 翻 譯 及 譯 文外文文獻(xiàn)：Knowledge of the stepper motorWhat is a stepper motor： Stepper motor is a kind of electrical pulses into angular displacement of the implementing agency. Popular little lesson: When the driver receives a step pulse signal, it will drive a stepper motor to set the direction of rotation at a fixed angle (and the step angle). You can control the number of pulses to control the angular displacement, so as to achieve accurate positioning purposes。 hybrid stepper is a mix of permanent magnet and reactive advantages. It consists of two phases and the fivephase: twophase step angle of degrees while the general fivephase step angle of degrees generally. The most widely used Stepper Motor.What is to keep the torque (HOLDING TORQUE)How much precision stepper motor? Whether the cumulative： The general accuracy of the stepper motor step angle of 35%, and not cumulative.Stepper motor to allow the minimum amount of surface temperatureStepper motor to allow the minimum amount of surface temperature：Stepper motor causes the motor temperature is too high the first magnetic demagnetization, resulting in loss of torque down even further, so the motor surface temperature should be the maximum allowed depending on the motor demagnetization of magnetic material points。s MAX7000 family. High impedance, electrically erasable and other characteristics, can be used for the 2500 unit, the working voltage of +5 V. CPLD receives information sent from the microcontroller after converted to the corresponding control signal output to the stepper motor drive. Put the control signal drives the motor windings after the input, to achieve effective control of the motor. The hardware structure of the motor driveMotor drive using the following circuit: R1R8 in which the resistance value of 320Ω. R9R12 resistance value . Q1Q4 as Darlington D401A, Q5Q8 for the S8550. J1, J2 and the stepper motor connected to the sixlead。 4. Excellent response from the stop and reverse。 control the number of step pulses to connect the motor accurately. Stepper motor drive there are many, we should take a reasonable choice of power requirements of the drive, the following were introduced various types of typical drive.The latest technological developmentsDomestic and international research on the subdrive technology is very active, highperformance subdriver circuit can be broken down into thousands or even any subdivision. Now able to do plicated calculations to make after the breakdown of uniform step angle, which greatly improves the resolution of stepper motor pulses, reduce or eliminate the vibration, noise and torque ripple, the stepper motor is more class server feature.The actual role of step angle: in the absence of subdrive, the user select a different number of phases depends mainly on the stepper motor to meet their own requirements on the step angle，If you use the subdrive, the user can change the drive number of segments, can dramatically change the actual step angle stepper motor 39。您可以通過控制脈沖個(gè)數(shù)來控制角位移，從而達(dá)到準(zhǔn)確定位的目的。在歐洲和美洲80個(gè)國家已被淘汰。步進(jìn)電機(jī)允許的最高表面溫度步進(jìn)電機(jī)溫度過高首先會(huì)的磁性材料退磁，導(dǎo)致轉(zhuǎn)矩降低甚至失步，電機(jī)表面溫度允許的最大值取決于的磁性材料退磁點(diǎn)。電源電流一般根據(jù)輸出相電流I來確定。轉(zhuǎn)速與脈沖頻率成正比。因此，目前的打印機(jī)，繪圖儀，機(jī)器人設(shè)備以步進(jìn)電機(jī)作為動(dòng)力核心。我們使用四相八拍控制，即第1階段第2階段交替反過來，會(huì)提高分辨率。它是與AT89C51兼容，但也增加了SPI接口和看門狗模塊，這不僅使調(diào)試變得更容易，也更穩(wěn)定。具有高阻抗，電可擦除等特點(diǎn)，可用單位數(shù)為2500單位，工作電壓+5 V CPLD接收脈沖后轉(zhuǎn)換為相應(yīng)的控制信號(hào)輸出到步進(jìn)電機(jī)驅(qū)動(dòng)器，從微控制器發(fā)送的信息。 Q1?Q4作為達(dá)林頓401A，Q5Q8為S8550。2。4。6。如果沒有適當(dāng)?shù)目刂?，容易共振。沒有體積小，重量輕，能耗低，效率高等方面優(yōu)勢5。通過把一個(gè)多功能8位CPU與一個(gè)單一的芯片上的Flash相結(jié)合的，Atmel的AT89C51是一個(gè)功能強(qiáng)大微型計(jì)算機(jī)為許多嵌入式控制程序提供了高度靈活和成本效益的解決方案。掉電模式保存RAM的內(nèi)容，但凍結(jié)振蕩器，禁用所有其他芯片功能，直到硬件復(fù)位。在這種模式下， 在Flash編程期間也可以收到代碼字節(jié)，輸出程序改變的代碼字節(jié)。端口2輸出緩沖器可以驅(qū)動(dòng)四個(gè)TTL 輸入。在訪問使用8位地址的外部數(shù)據(jù)存儲(chǔ)器時(shí)，端口2也會(huì)收到一些高八位地址信號(hào)或者控制信號(hào)。作為輸入口時(shí)，由于內(nèi)部上拉電阻的做用，端口2引腳被外部信號(hào)拉至低電平時(shí)，將輸出電流。該引腳也是程序在Flash 編程時(shí)的PROG。此時(shí)，ALE僅執(zhí)行MOVX或MOVC指令。EA/ VPP外部訪問允許。在Flash編程時(shí)，也可以使用使用12V編程電壓VCCXTAL1：震蕩器反相放大器及內(nèi)部時(shí)鐘發(fā)生器的輸入端。如圖2所示要想通過外部時(shí)鐘來驅(qū)動(dòng)它， XTAL1工作時(shí)XTAL2應(yīng)懸空。這種模式下，片上RAM和所有特殊功能寄存器的內(nèi)部數(shù)據(jù)不變。終止掉電唯一的方式是硬