雙軸雙電機驅(qū)動電動汽車整車控制器開發(fā)

宋振斌 李軍偉 孫賓賓 王培金

摘 ?要： 為解決單電機驅(qū)動電動汽車動力性和經(jīng)濟性不能同時兼?zhèn)涞牟蛔悖O(shè)計開發(fā)了雙軸雙電機驅(qū)動電動汽車。針對雙軸驅(qū)動電動汽車動力構(gòu)型的特點，開發(fā)一款基于MC9S12XEP100單片機為控制核心的整車控制系統(tǒng)。在分析整車控制器功能需求的基礎(chǔ)上，設(shè)計了整車控制器的硬件電路，開發(fā)了整車控制軟件。實車測試結(jié)果為0～30 km/h加速時間為3.25 s， 0～50 km/h加速時間為6.5 s，最高車速可以大于100 km/h。實車測試表明所開發(fā)的整車控制器達到了設(shè)計指標(biāo)的要求。

關(guān)鍵詞： 電動汽車; 雙軸雙電機驅(qū)動; 整車控制器; MC9S12XEP100單片機; 硬件設(shè)計; 軟件開發(fā)

中圖分類號： TN876?34; U469.72 ? ? ? ? ? ? ? ? ? ?文獻標(biāo)識碼： A ? ? ? ? ? ? ? ? ? 文章編號： 1004?373X（2020）01?0140?03

Development of dual?axis dual?motor?driven electric vehicle control unit

SONG Zhenbin， LI Junwei， SUN Binbin， WANG Peijin

Abstract： To deal with the deficiency that the power and economical efficiency of the single?motor?driven electric vehicle could not be satisfied both， a dual?axis dual?motor?driven electric vehicle is designed and developed. According to the power configuration characteristics of the dual?axle dual?motor?driven electric vehicle， a vehicle control system with MC9S12XEP100 microcontroller as the control core is developed. Based on the analysis of the functional requirements of the vehicle control unit， the hardware circuit of the vehicle control unit is designed and the vehicle control software is developed. The results of real vehicle test show that when the speed is in the range of 0～30 km/h， the acceleration time is 3.25 s; when the speed is in the range of 0～50 km/h， the acceleration time is 6.5 s; the maximum speed can be greater than 100 km/h. The real vehicle test show that the vehicle control unit developed meets the requirements of design indicators.

Keywords： electric vehicle; dual?axis dual?motor drive; vehicle controller; MC9S12XEP100 microcontroller; hardware design; software development

0 ?引 ?言

目前市面上純電動汽車的動力構(gòu)型大多采用單電機單軸驅(qū)動的構(gòu)型方式，這種動力構(gòu)型的驅(qū)動電機一般是根據(jù)車輛行駛時所需求的最大功率進行匹配的[1?3]。車輛在低速小負載行駛時，驅(qū)動電機運行于低速低效率區(qū)，使得整車的效率降低。因此，單電機驅(qū)動的電動汽車所匹配的電機雖然能夠滿足整車動力性的要求，但經(jīng)濟性會受到影響。對于電動汽車來說，由于傳動系統(tǒng)的簡化，則完全可以方便地設(shè)計成前后軸各安裝一個功率相對較小的驅(qū)動電機的構(gòu)型方案。當(dāng)整車需求功率較低時，采用單電機驅(qū)動模式，避免了常規(guī)電動汽車單電機驅(qū)動時電機效率低下的情況發(fā)生，提高了整車的經(jīng)濟性;當(dāng)整車需求功率較高時，采用前后軸雙電機聯(lián)合驅(qū)動模式，滿足整車動力性的需求。……