摘要:提出了具體變頻器主電路和控制電路的設(shè)計方案,利用輸出電流完成了永磁同步電動機轉(zhuǎn)速自動跟蹤。采用高功率因數(shù)控制,實現(xiàn)了永磁同步電動機自適應U/f曲線控制.對永磁同步電動機的并網(wǎng)控制進行了研究,根據(jù)負載情況估測永磁同步電動機定子電壓相位,實驗測試曲線表明并網(wǎng)過程定子電壓曲線過渡平滑,基本無沖擊。對永磁同步電動機的變頻器進行了樣機實驗,結(jié)果證明性能良好,完全能滿足抽油機永磁同步電動機的要求。
關(guān)鍵詞:永磁同步電動機;變頻器;高功率因數(shù)
[b][align=center]Investigation of PM SM frequency·variable control system
LONG San—ping,LIU Wei,YOU Jiang
(College of Automation,Harbin Engineering University,Harbin 150001,China)[/align][/b]
Abstract:The design scheme is proposed for major circuit of transducer and its control circuit.The automatic tracking to PMSM is achieved with output current.Adaptive U/f control is made through high power factor control
The dconnected control of PMSM is studied by estimating the voltage phase of PMSM S stator under diferent loading conditions. The experimental test shows that the statorg voltage curve is smooth in the process of grid connection without any impact.Th e prototype experiment of PMSM transducer is conducted.The result shows good performance and satisfaction of requirement to PMSM in pumping unit。
Keywords:permanent magnet synchronous machine(PMSM);transducer;high power factor
高磁場永磁電動機具有體積小、質(zhì)量小、慣性低、響應快、高轉(zhuǎn)矩/慣量比、高速率/重量比、高效率、高啟動轉(zhuǎn)矩和高功率因數(shù) ,以及省電和運行可靠等明顯特點。為了實現(xiàn)高性能控制,設(shè)計了基于TMS320F2407為控制核心的永磁同步電動機調(diào)速系統(tǒng)。
1 主電路設(shè)計和控制電路
主電路采用電壓型交-直-交結(jié)構(gòu) ,如圖1所示,利用三相不可控全橋整流模塊整流,逆變采用IGBT模塊,IGBT 驅(qū)動模塊選用富士公司的EXB841。由于該模塊的設(shè)計不足,經(jīng)常出現(xiàn)燒毀IGBT的現(xiàn)象.經(jīng)多次實驗后發(fā)現(xiàn):1)導致EXB841內(nèi)置的5 V穩(wěn)壓管損壞的主要原因是在輸出正向柵壓瞬間,其瞬態(tài)功耗遠大于其額定功耗;2)穩(wěn)壓管產(chǎn)生的5 V反向關(guān)斷柵壓的動態(tài)性能欠佳,在(+20 V)電源間向串接(+15 V)和(+5 V)的穩(wěn)壓管,可快速關(guān)斷IGBT;3)增大柵極驅(qū)動電阻R ,有利于減小瞬態(tài)功耗,但要兼顧驅(qū)動柵壓的動態(tài)性能。
[b][align=center]詳細內(nèi)容請點擊:
永磁同步電動機變頻調(diào)速系統(tǒng)[/align][/b]