【摘要】：本文的研究對(duì)象是混合式的步進(jìn)電機(jī)，該種電機(jī)定位精度高、響應(yīng)速度快、控制簡(jiǎn)單、無累積誤差。因此，被廣泛應(yīng)用于各種控制領(lǐng)域。但是，它存在著失步、低頻振蕩、可靠性差、分辨率不高和運(yùn)行噪聲大等缺點(diǎn)。為了克服步進(jìn)電機(jī)的這些缺點(diǎn)，本文采用了細(xì)分驅(qū)動(dòng)原理來驅(qū)動(dòng)步進(jìn)電機(jī)。 本文使用的主控制芯片是TI公司生產(chǎn)的TMS320F2812DSP，通過其EV事件管理器產(chǎn)生的PWM波去控制步進(jìn)電機(jī)。其間采用了DA模塊，將細(xì)分值的數(shù)字量轉(zhuǎn)化為階梯狀的模擬量，來等效代替正余弦波。從而實(shí)現(xiàn)細(xì)分步進(jìn)電機(jī)繞組中的電流的目的，最終達(dá)到細(xì)分步進(jìn)電機(jī)的步距角。本文在概述部分詳細(xì)的介紹了混合式的步進(jìn)電機(jī)的結(jié)構(gòu)、參數(shù)、以及工作原理等。仔細(xì)的講述了幾種傳統(tǒng)的驅(qū)動(dòng)方式，并重點(diǎn)說明了細(xì)分驅(qū)動(dòng)的原理。硬件系統(tǒng)以DSP為系統(tǒng)的主控芯片，主要可以分為邏輯綜合電路部分、DA轉(zhuǎn)換模塊部分、功率驅(qū)動(dòng)部分和過流保護(hù)幾個(gè)部分。軟件部分通過DSP的EV模塊產(chǎn)生了PWM波，然后又通過GPIO模塊產(chǎn)生電機(jī)繞組的相序信號(hào)，最后通過SCI串口通信模塊實(shí)現(xiàn)與上位機(jī)的通信。在最后一章，又通過Mat lab軟件的Simul-ink模塊對(duì)步進(jìn)電機(jī)控制系統(tǒng)進(jìn)行了仿真。實(shí)驗(yàn)結(jié)果以及仿真結(jié)果都表明，，該步進(jìn)電機(jī)控制系統(tǒng)運(yùn)行平穩(wěn)、精度高，克服了低頻振蕩、失步等問題，基本滿足了設(shè)計(jì)的要求。本文設(shè)計(jì)的最高細(xì)分值是128，當(dāng)然如果有需要，細(xì)分值還可以增大。系統(tǒng)還是相對(duì)較靈活的，具有一定的實(shí)用性和合理性。
[Abstract]:The research object of this paper is hybrid stepping motor, which has high positioning accuracy, fast response speed, simple control and no cumulative error. Therefore, it is widely used in various control fields. However, it has some shortcomings, such as out-of-step, low frequency oscillation, poor reliability, low resolution and large operation noise. In order to overcome these shortcomings of stepping motor, this paper adopts the principle of subdivision drive to drive stepping motor. The main control chip used in this paper is the TMS320F2812DSP, produced by TI Company to control the stepping motor through the PWM wave generated by its EV event manager. The DA module is used to convert the numerical value of the fine score into the stepped analog quantity to replace the sine and cosine wave. In order to achieve the purpose of subdividing the current in the winding of the stepping motor, and finally to achieve the step angle of the subdivision stepping motor. In this paper, the structure, parameters and working principle of hybrid stepping motor are introduced in detail. Several traditional driving methods are described carefully, and the principle of subdivision driving is emphasized. The hardware system takes DSP as the main control chip of the system, which can be divided into logic integrated circuit part, DA conversion module part, power drive part and over-current protection part. In the software part, the PWM wave is generated by the EV module of DSP, and then the phase sequence signal of the motor winding is generated by the GPIO module. Finally, the communication with the upper computer is realized through the SCI serial communication module. In the last chapter, the stepping motor control system is simulated by Simul-ink module of Mat lab software. The experimental results and simulation results show that the stepping motor control system runs smoothly, has high precision, overcome the problems of low frequency oscillation and out of step, and basically meets the requirements of the design. The highest subdivision value designed in this paper is 128, of course, if necessary, the subdivision value can be increased. The system is still relatively flexible and has certain practicability and rationality.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM301.2

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