1.導(dǎo)語(yǔ)
這些年，跟著變頻器本身功用的不斷完善，交流調(diào)速技術(shù)有了長(zhǎng)足的跋涉。怎么在不一樣使用條件下充分開(kāi)發(fā)變頻器本身功用、有用的降低設(shè)備的改形本錢已成為一個(gè)主要疑問(wèn)。與通常的控制方法比照，使用變頻器直流制動(dòng)功用結(jié)束交流拖動(dòng)系統(tǒng)精確泊車的計(jì)劃計(jì)劃省去了價(jià)值寶貴的變頻器專用制動(dòng)單元／制動(dòng)電阻，有用降低了設(shè)備改形本錢，工作安穩(wěn)可靠、控制精度高。
2.VVVF能耗制動(dòng)的理論分析
通用變頻器供給的制動(dòng)方法主要有：能耗制動(dòng)、再生制動(dòng)、整流回饋等。在轉(zhuǎn)動(dòng)慣量較大的工況條件下，變頻器廠家所主張選用的通常方法是外接制動(dòng)電阻和制動(dòng)單元的再生制動(dòng)方法，某些情況下可以協(xié)作選用直流制動(dòng)。這一計(jì)劃思路底子為大多數(shù)目?jī)?nèi)用戶所接受，并在實(shí)踐使用中獲得了較好的作用。但該計(jì)劃需其他收購(gòu)變頻器廠家供給的專用制動(dòng)單元／制動(dòng)電阻，無(wú)形中增大了改形本錢。
所謂“直流制動(dòng)”，通常指當(dāng)變頻器的輸出頻率靠近為零，電機(jī)的轉(zhuǎn)速降低到必定數(shù)值時(shí)，變頻器改向異步電動(dòng)機(jī)定子繞組中通入直流，構(gòu)成間斷磁場(chǎng)，此時(shí)電動(dòng)機(jī)處于能耗制動(dòng)情況，轉(zhuǎn)動(dòng)著的轉(zhuǎn)子切開(kāi)該間斷磁場(chǎng)而發(fā)作制動(dòng)轉(zhuǎn)矩，使電動(dòng)機(jī)活絡(luò)間斷。在電動(dòng)機(jī)制動(dòng)進(jìn)程中，因?yàn)樽冾l器輸出頻率逐漸降低，則定子繞組內(nèi)的同步磁場(chǎng)轉(zhuǎn)速低于轉(zhuǎn)子轉(zhuǎn)速，電動(dòng)機(jī)處于再生制動(dòng)進(jìn)程，此時(shí)旋轉(zhuǎn)系統(tǒng)存儲(chǔ)的動(dòng)能轉(zhuǎn)換成電能熱損耗的方法消耗于異步電動(dòng)機(jī)的轉(zhuǎn)子回路中，為避免電動(dòng)機(jī)減速進(jìn)程中所構(gòu)成的再生發(fā)電制動(dòng)以及直流制動(dòng)進(jìn)程中的能量回饋，構(gòu)成變頻器和電機(jī)的損壞，需串入專用制動(dòng)單元／制動(dòng)電阻。
TURCK BL20-16DI-24VDC-P 1
ULTRA SLIMPAK G428-0001 1
UNIOP ELT-VGA-0045 1
VALMET CPR1 A413280 1
VALMET A413045 3
VALMET 421907-1B 1
VALMET A413052 1
VALMET 421907-1B 2
VEXTA A3897-9412 1
VEXTA PH266-01GK-C5 1
VISHAY 120NQ045R 4
VMIC VMIVME Model 2533 Assy No 332-002533-010E 1
VMIC ZT5524A1A 1
VWR SCIENTIFIC MODEL 3000 1
WEIDMULLER 836598 1
WEIDMULLER 844495000 1
WEIDMULLER 8533640000 1
WEIDMULLER 844725 2
WEIDMULLER 8540180000 1
WEIDMULLER 8560740000 1
WEIDMULLER 860736000 1
WEIDMULLER 8690880000 1
WEIDMULLER V23057-B3028-A101 1
WEIDMULLER 0302860000 40
WEIDMULLER 7940005785 1
WEIDMULLER 7901620000 1
WEISTINGHOUSE 1C31238H01 1
WEISTINGHOUSE 1C31238H01 1
WEISTINGHOUSE 1C31234G01 2
WEISTINGHOUSE 1C31227GO1 2
WEISTINGHOUSE 1C31238H01 1
WEISTINGHOUSE 1C31234G01 3
WEISTINGHOUSE 1C31227G01 2
WEISTINGHOUSE 1C31224GO1 1
WEISTINGHOUSE 1C31224G01 3
WEISTINGHOUSE 1C31233G04 1
WEISTINGHOUSE 5X00167G01 2
WEISTINGHOUSE 1C31127G01 2
WEISTINGHOUSE 1C31125G02 2
WEISTINGHOUSE 1C31116G04 2
WEISTINGHOUSE 1B30023H01 2
WEISTINGHOUSE 1C31132G01 1
WEISTINGHOUSE 5X00321G01 2
WESTINGHOUSE 3A99158G01 19
WESTINGHOUSE ST24B3 12
WESTINGHOUSE AID-1(西屋鍵盤) 5
WESTINGHOUSE 5A26391H24 9
WESTINGHOUSE 3A99132G01 2
WESTINGHOUSE 3A99132G02 8
WESTINGHOUSE 1C31234G01 5
WESTINGHOUSE 1C31234G01 3
WESTINGHOUSE 1C31234G01 2
WESTINGHOUSE 4D33942G01 6
WESTINGHOUSE 3A99200G01 6
WESTINGHOUSE 1C31234G01 55
WESTINGHOUSE 1X00024H01 1
WESTINGHOUSE 5X00119G01 1
WESTINGHOUSE 1X00024H01 3
WESTINGHOUSE 1X00416H01 1
WESTINGHOUSE ZX345Q 8
WESTINGHOUSE 5X00241G01 2
WESTINGHOUSE 5X00226G02 2
WESTINGHOUSE 5X00119G01 1
WESTINGHOUSE 1C31238H01 2
WESTINGHOUSE 1C31238H01 4
WESTINGHOUSE 1C31238H01 3
WESTINGHOUSE 1C31238H01 2
WESTINGHOUSE 5X00105G14 1
WESTINGHOUSE 5X00105G01 2
WESTINGHOUSE 5X00059G01 2
WESTINGHOUSE 5X00058G01 2
WESTINGHOUSE 1C31234G01 4
WESTINGHOUSE 1C31224G01 3
WESTINGHOUSE 1C31161G02 45
WESTINGHOUSE 1C31150G01 4
WESTINGHOUSE 1C31147G01 4
WESTINGHOUSE 1C31197G01 2
WESTINGHOUSE 1C31203G01 1
WESTINGHOUSE 1C31204G01 1
WESTINGHOUSE 1C31164G02 59
WESTINGHOUSE 1C31132G01 2
WESTINGHOUSE 1C31224G01 13
WESTINGHOUSE 1C31224G01 2
WESTINGHOUSE 1C31224G01 2
WESTINGHOUSE 1C31224G01 4
WESTINGHOUSE 1C31132G01 1
WESTINGHOUSE 1C31132G01 9
WESTINGHOUSE 1C31189G01 1
WESTINGHOUSE 1C31194G01 2
WESTINGHOUSE 1C31194G01 1
WESTINGHOUSE 1C31192G01 2
WESTINGHOUSE 1C31192G01 1
WESTINGHOUSE 1C31189G01 2
WESTINGHOUSE 1C31166G01 1
WESTINGHOUSE 1C31179G02 1
WESTINGHOUSE 1C31194G02 3
WESTINGHOUSE 1C31169G02 1
WESTINGHOUSE 1C31194G03 2
WESTINGHOUSE 1C31197G01 2
WESTINGHOUSE 1C31166G01 1
WESTINGHOUSE 1C31113G02 31
WESTINGHOUSE 1C31125G02 1
WESTINGHOUSE 1C31227G01 2
WESTINGHOUSE 1C31227G01 2
WESTINGHOUSE 1B30035H01 3
WESTINGHOUSE 1C31227G01 4
WESTINGHOUSE 1C31129G03 2
WESTINGHOUSE 1C31227G01 1
WESTINGHOUSE 1C31227G02 2
WESTINGHOUSE 1C31125G02 42
WESTINGHOUSE 1C31122G01 1
WESTINGHOUSE 1C31122G01 30
WESTINGHOUSE 1C31116G04 17
WESTINGHOUSE 1B30023H01 4
WESTINGHOUSE 1B30035H01 72
WESTINGHOUSE 1C31129G03 2
WESTINGHOUSE 1C31227G01 52
WESTINGHOUSE 1B30035H01 2
WESTINGHOUSE 1C31129G03 12
WESTINGHOUSE 1C31132G01 1
WESTINGHOUSE 1B30035H01 2
WESTOVER SCIENTIFIC FM-C200 1
WOHNER 31110 1
WOODHEAD 5136-PFB-VME 1
WOODWARD 5464-414 1
WOODWARD 9907-175 1
WOODWARD 9907-164 1
WOODWARD 9907-164 1
WOODWARD 9907-028 1
WOODWARD 9907-252 1
WOODWARD 2301A /9905-020 1
WOODWARD 9907-162 1
XANTREX XFR40-30 1
XANTREX XFR40-70 1
XANTREX XFR 20-130 1
XYCOM XVME-653 0
XYCOM XVME-530 1
XYCOM XVME-976 1
XYCOM Proto XVME-085 1
YAMAHA RCX40 1
YAMATAKE HD-CAOBS00 3
YASKAWA JGSM-06 1
YASKAWA CACR-HR10BB 1
YASKAWA AI-01 1
YASKAWA JRMSP-P8101 1
YASKAWA JRMSI-B1026 1
YASKAWA CIMR-M5D2018 1
YASKAWA JEPMC-PC040 1
YASKAWA JEPMC-MC001 1
YASKAWA JEPMC-CP210T2V 1
YASKAWA JANCD-XCP01-1 1
YASKAWA JANCD-PC51 1
YASKAWA JANCD-MSV01B 1
YASKAWA JANCD-MIF01 1
YASKAWA JANCD-MCP02B-1 1
YASKAWA PS-02 1
YASKAWA LASC-100SUB 1
YASKAWA CP-9200SH/SVA 1
YASKAWA NPSO-0503L 1
YASKAWA MB-01 1
YASKAWA LIO-01 2
YASKAWA LI0-01 1
YASKAWA LASC-100W8 1
YASKAWA PS-01 2
YASKAWA JZNC-XPP02B 1
YASKAWA JZNC-XIU01B 1
YASKAWA JZNC-MRK12-1E 1
YASKAWA JUSP-WS15AB 1
YASKAWA DI-01 7
YASKAWA JUSP-NS300 1
YASKAWA CP-9200SH/CPU 4
YASKAWA SGMAH-02AAA21 2
Yaskawa JZNC-XPP02B 1
YASKAWA JACP-317900 1
YASKAWA JANCD-JSP04-1 1
YASKAWA JAMSC-B1050 3
YASKAWA JAMSC-B1063 1
YASKAWA JAMSC-B1070 1
YASKAWA SJDE-04ANA-OY 1
YASKAWA JAMSC-B1071 1
YASKAWA JANCD-CP50B 1
YASKAWA JACP-317900 1
YASKAWA SGDS-08A01A 1
YASKAWA JAMSC-C8120 1
YASKAWA JAMSI-B1031 1
YASKAWA CPS-18F8 1
YASKAWA JAMSC-C8160 1
YASKAWA CP-9200SH/CPU 2
YASKAWA CP-9200SH/SVA 1
YASKAWA CP-9200SH/SVA 1
YASKAWA CP-9200SH/SVA 7
