基于LPC2124的超聲波電機驅(qū)動控制系統(tǒng)

　　針對行波型超聲波電機的驅(qū)動控制特性，為方便電機調(diào)試，實現(xiàn)電機的轉(zhuǎn)速或位置信號檢測，檢測電機首次啟動時的環(huán)境溫度，設(shè)計了一款基于LPC2124的驅(qū)動控制系統(tǒng)。采用傳統(tǒng)的推挽電路實現(xiàn)功率放大，串聯(lián)電感進行諧振匹配。運用LPC2124內(nèi)置的脈寬調(diào)制器和A/D轉(zhuǎn)換器，外加微調(diào)電阻，可實時調(diào)節(jié)PWM頻率，從而方便電機的調(diào)試?；魻?a href='http://www.wenjunhu.com/v/tag/117/' target='_blank' class='arckwlink_none'>傳感器ATS642LSH結(jié)合固定在電機轉(zhuǎn)子上的環(huán)形齒輪，檢測電機轉(zhuǎn)速或位置。采用LM75溫度傳感器，檢測環(huán)境溫度，給電機的首次啟動提供一個參考溫度。試驗表明，系統(tǒng)能順利檢測環(huán)境溫度，能穩(wěn)定、可靠地驅(qū)動電機工作，同時檢測電機的轉(zhuǎn)速或位置信號。

　　Abstract:

　　For the special driving and controlling features of traveling-wave type ultrasonic motor，to facilitate motor’s testing， to detect the speed or position of motor， to sense the temperature when first driving the motor， this paper designed a system based on LPC2124.A traditional push-pull circuit amplified power and series inductor resonated with motor.LPC2124’s pulse-width modulator and A/D converter with an adjustable resistor could modulate the frequency of PWM real time.Hall sensor ATS642LSH detected the speed or position with a ring gear fixed on the rotor.LM75 measured the environment temperature，and LPC2124 generated PWM signals according to the temperature，especially when first driving the motor.The experiment results show that the system could successfully measure the temperature，steadily and reliably drive motor，and detect speed or position singal.