振动与冲击
振動與遲擊
진동여충격
JOURNAL OF VIBRATION AND SHOCK
2015年
2期
114-118
,共5页
阚君武%于丽%王淑云%杨振宇%李洋%金贤芳
闞君武%于麗%王淑雲%楊振宇%李洋%金賢芳
감군무%우려%왕숙운%양진우%리양%금현방
压电%发电%旋转激励%磁力耦合
壓電%髮電%鏇轉激勵%磁力耦閤
압전%발전%선전격려%자력우합
piezoelectricity%energy generation%rotating excitation%magnetic coupling
为满足旋转机构监测系统自供电需求,设计旋磁激励式圆形压电振子发电机,并着重研究磁铁尺寸、磁铁间距、压电振子厚度等对压电振子一次受激产生的最大输出电压及总能量的影响规律。结果表明,其它条件确定时,增加磁铁尺度或减小磁铁间距均可有效提高发电机输出电压及有效速带宽度。试验获得输出电压大于12 V 的转速范围为100~2850 r/min。压电振子厚度对输出电压及总发电量均有较大影响,低转速时采用薄压电振子、高转速时采用厚压电振子有助于提高发、供电能力。0.2 mm、0.4 mm、0.6 mm 厚压电振子最佳转速分别为707.5 r/min、1301.8 r/min、2490.4 r/min,0.2 mm 厚压电振子一次受激产生的电能/功率分别为0.4 mm、0.6 mm 压电振子的3.1/1.7倍、6.4/2.0倍。以输出5 V 供电电压为例,912 r/min 时0.4 mm 厚压电振子输出电能为0.6 mm 厚压电振子的5倍,1710 r/min 时0.6 mm 厚压电振子的输出电能为0.4 mm 压电振子的1.7倍。
為滿足鏇轉機構鑑測繫統自供電需求,設計鏇磁激勵式圓形壓電振子髮電機,併著重研究磁鐵呎吋、磁鐵間距、壓電振子厚度等對壓電振子一次受激產生的最大輸齣電壓及總能量的影響規律。結果錶明,其它條件確定時,增加磁鐵呎度或減小磁鐵間距均可有效提高髮電機輸齣電壓及有效速帶寬度。試驗穫得輸齣電壓大于12 V 的轉速範圍為100~2850 r/min。壓電振子厚度對輸齣電壓及總髮電量均有較大影響,低轉速時採用薄壓電振子、高轉速時採用厚壓電振子有助于提高髮、供電能力。0.2 mm、0.4 mm、0.6 mm 厚壓電振子最佳轉速分彆為707.5 r/min、1301.8 r/min、2490.4 r/min,0.2 mm 厚壓電振子一次受激產生的電能/功率分彆為0.4 mm、0.6 mm 壓電振子的3.1/1.7倍、6.4/2.0倍。以輸齣5 V 供電電壓為例,912 r/min 時0.4 mm 厚壓電振子輸齣電能為0.6 mm 厚壓電振子的5倍,1710 r/min 時0.6 mm 厚壓電振子的輸齣電能為0.4 mm 壓電振子的1.7倍。
위만족선전궤구감측계통자공전수구,설계선자격려식원형압전진자발전궤,병착중연구자철척촌、자철간거、압전진자후도등대압전진자일차수격산생적최대수출전압급총능량적영향규률。결과표명,기타조건학정시,증가자철척도혹감소자철간거균가유효제고발전궤수출전압급유효속대관도。시험획득수출전압대우12 V 적전속범위위100~2850 r/min。압전진자후도대수출전압급총발전량균유교대영향,저전속시채용박압전진자、고전속시채용후압전진자유조우제고발、공전능력。0.2 mm、0.4 mm、0.6 mm 후압전진자최가전속분별위707.5 r/min、1301.8 r/min、2490.4 r/min,0.2 mm 후압전진자일차수격산생적전능/공솔분별위0.4 mm、0.6 mm 압전진자적3.1/1.7배、6.4/2.0배。이수출5 V 공전전압위례,912 r/min 시0.4 mm 후압전진자수출전능위0.6 mm 후압전진자적5배,1710 r/min 시0.6 mm 후압전진자적수출전능위0.4 mm 압전진자적1.7배。
To meet the demands of self-powered monitoring system for rotating machine,a novel piezodisc generator excited by the coupling effect between rotating magnets and those fixed on piezodisc was presented.The influence of system factors on the maximal voltage and total energy generated from the piezodisc under one excitation was investigated. The research results show that both the output voltage and effective speed-band can be enhanced with increasing magnet size or decreasing the distance between magnets.In this way,output voltage beyond 12 V can be obtained at rotating speed range of 100 ~2850 r/min.Besides,the thickness of the piezodisc exerts also great influence on the generated voltage and electric energy.Both the maximal voltage and total electric energy can be enhanced by using a thin piezodisc at low speed or a thick piezodisc at high speed.The optimal speeds for the piezodiscs of 0.2 /0.4 /0.6 mm thickness to obtain maximal energy are 707.5 r/min,1301.8 r/min and 2490.4 r/min respectively.At the optimal speed and under one excitation,the obtained energy/power by the 0.2mm thickness piezodisc are 3.1 /1.7 and 6.4 /2.0 times those by the 0.4 mm and 0.6 mm thickness piezodiscs.Taking 5 V output voltage for example,the usable energy generated by the 0.4 mm thickness piezodisc is 5 times that by the 0.6 mm thickness piezodisc at 912 r/min.While,the usable energy by the 0.6 mm thickness piezodisc is 1.7 times that by the 0.4 mm thickness piezodisc at 1710 r/min.