直流電機(jī)具有響應(yīng)快速、較大的起動(dòng)轉(zhuǎn)矩、 從零轉(zhuǎn)速至額定轉(zhuǎn)速具備可提供額定轉(zhuǎn)矩的性能,但直流電機(jī)的優(yōu)點(diǎn)也正是它的缺點(diǎn),因?yàn)橹绷麟姍C(jī)要產(chǎn)生額定負(fù)載下恒定轉(zhuǎn)矩的性能,則電樞磁場(chǎng)與轉(zhuǎn)子磁場(chǎng)須恒維持90°,這就要藉由碳刷及整流子。碳刷及整流子在電機(jī)轉(zhuǎn)動(dòng)時(shí)會(huì)產(chǎn)生火花、碳粉因此除了會(huì)造成組件損壞之外,使用場(chǎng)合也受到限制。交流電機(jī)沒有碳刷及整流子,免維護(hù)、堅(jiān)固、應(yīng)用廣,但特性上若要達(dá)到相當(dāng)于直流電機(jī)的性能須用復(fù)雜控制技術(shù)才能達(dá)到?,F(xiàn)今半導(dǎo)體發(fā)展迅速功率組件切換頻率加快許多,提升驅(qū)動(dòng)電機(jī)的性能。微處理機(jī)速度亦越來越快,可實(shí)現(xiàn)將交流電機(jī)控制置于一旋轉(zhuǎn)的兩軸直交坐標(biāo)系統(tǒng)中,適當(dāng)控制交流電機(jī)在兩軸電流分量,達(dá)到類似直流電機(jī)控制并有與直流電機(jī)相當(dāng)?shù)男阅堋?/p>
此外已有很多微處理機(jī)將控制電機(jī)必需的功能做在芯片中,而且體積越來越??;像模擬/數(shù)字轉(zhuǎn)換器(analog-to-digital converter,adc)、脈沖寬度調(diào)制(pulse wide modulator,pwm)…等。直流無刷電機(jī)即是以電子方式控制交流電機(jī)換相,得到類似直流電機(jī)特性又沒有直流電機(jī)機(jī)構(gòu)上缺失的一種應(yīng)用。
WEIGEL WGL.RN.060MV/1000A_05_B Shunt resistance 60 mV / 1000 A Class 0.5 to DIN 43 703 type B 60 mV / 1000 A
WEIGEL DGW2.2 0-1625kw(48..62hz) 250/1A 6000/100V 4-20mA 2..10V
WEIGEL EQ96K 0-1A=》0-800A
WEIGEL SHUNT 60MV 800A, 137-9052
WEIGEL SUS-01-Q-2/G-220DC
WEIGEL EQ 72K
WEIGEL PQ96K 0-40V
WEIGEL PQ96K
WEIGEL AMPQ72KDZS012 4-20mA Skala: 0-300A
WEIGEL PQ48K 0-40microA
WEIGEL PQ96K 60-0-60mv
WEIGEL LSP72K meas.range 4-20ma SCALEO-1000N/M
WEIGEL WGL.RN.060MV/0300A_05_B Shunt resistance 60 mV / 300 A Class 0.5 to DIN 43 703 type B 60 mV / 300 A
WEIGEL 674.110.00 EQ48K Sonder-MB: 0-250/500 mA Skala: 0-250/500 mA
WEIGEL AMEQ72KLZS001
WEIGEL PQ72K 0-20MA
WEIGEL AU2.0 0-1A
WEIGEL LSP96K 4-20mA 90×90mm
WEIGEL WGL.RN.060MV/0300A_05_B Shunt resistance 60 mV / 300 A Class 0.5 to DIN 43 703 type B 60 mV / 300 A
WEIGEL PSQ48(4~20mA 帶零位調(diào)整)48mmX48mm
WEIGEL 800.7339.S.1KA.60mV
WEIGEL DAS10-40PIR
WEIGEL Q96K5A(10)400/5A
WEIGEL V1U2.2 0..120V(48..62hz) 4-20mA
WEIGEL PQ96K-+/-60MV/6;5KA
WEIGEL MP96 24K CA
WEIGEL PQ48K 4...20mA 0...315Bar
WEIGEL SY96S 100V 50HZ WITH FULLSIZED REAR COVER
WEIGEL AUE2.2 0-1A 4-20mA
WEIGEL 2EQ96/2 0-800V
WEIGEL VU03
WEIGEL AMPQ72KDZS010
WEIGEL DPA 10-31E10G
WEIGEL EQ144K/1A/300A
WEIGEL PQ72K 10V 120%
WEIGEL SHUNT 6000A/60MV/CLASS 0.5
WEIGEL 652.02.121600 SUS-01-Q R/G 220V DC
WEIGEL EQ96K 0-1A=》0-800A
WEIGEL PQ96K 0-10V:=0-150A
WEIGEL P72PRS
WEIGEL DPA 10-31E10G
WEIGEL EQ96K 0-500V
WEIGEL EQ96K 0-1A =》0-1600A
WEIGEL EQ96K 0-1A=》0-800A
WEIGEL shunt-150mV-1000A-0.5
WEIGEL EQ96K 100/5A
WEIGEL LSP96
WEIGEL TYPe:PQ Y24 MB 0-20MA 200% 輸入電壓:24V DC
WEIGEL FQ96/2
WEIGEL EQ48 150/5A
WEIGEL EQ96K500V
WEIGEL EQ48K 15/5A
WEIGEL SHUNT 4000A/60MV/CLASS 0.5
WEIGEL DPA 10-31E10G
WEIGEL PQ96K 60-0-60mv
WEIGEL DPA14-31A10R-4-M
WEIGEL EQ96K 0-500V
WEIGEL AUE2.2 0-1A 4-20MA 220V
WEIGEL SHUNT 6000A/60MV/CLASS 0.5
WEIGEL PQ48K 0-40MICROA
WEIGEL BIEQ 72K 15min 3000/1A
WEIGEL DPA 10-31E10G
WEIGEL LSP144
WEIGEL SHUNT 6000A/60MV/CLASS 0.5
WEIGEL EQ144K/1A/80A
WEIGEL PQ96K
WEIGEL EQ144K/1A/40A
WEIGEL DSA13-NP40/C1R-07
WEIGEL KL0.5,2000Amp/150MV
WEIGEL RW96min/max 150V(0-1A)
WEIGEL SHUNTISO. PLATE ARGE 155X90X6MM TRAFO,870-93260
WEIGEL RW96MIN
WEIGEL EQ48 10A
WEIGEL PQ 72 INPUT-10V DC
WEIGEL DAS10-40PIR
WEIGEL AU2.0 0-1A
WEIGEL EQ96-X CT 300/5A scale 0—300A 2倍過載 無紅線
WEIGEL 250V
WEIGEL PQ96K-+/-30VDC
WEIGEL TYPE:V1U 2.2 SN:26057009
WEIGEL EQ96K 100/5A
WEIGEL PQ96K 0-10V 0-120% POTI (0-10VDC/1mA + scale 0-120% w.pot )
WEIGEL WGL.PQ96K.0-10V.1000A_DC Analog meters with moving-coil movement measuring range 0…10 V DC scale 0…1000 A linear accuracy class 1.5
WEIGEL Type: VQ72K 0-750V Production ID: 1TNS08030129R1
WEIGEL AU2.0 Input: 0...1A Output: 0...20mA
WEIGEL EQ144K/1A/20A
WEIGEL 電流表 PQ 48K 4-20mA
WEIGEL A1U 2.3
WEIGEL WQ96/2S
WEIGEL WQ96RS SCALE:0-24KV
WEIGEL DSA55-NS50/A2RW-12
WEIGEL DPA 10-31E10G
WEIGEL PQ96K-+/-30VDC
WEIGEL EQ 72K N/1A AC
WEIGEL DUW2.1
WEIGEL 電壓變送器/V1U2.0
WEIGEL US-02 G/R 220VDC
WEIGEL PQ96K 10V 0-8000
WEIGEL EQ48K 0-250/500MA
WEIGEL LSP96K
WEIGEL AU2.0 Input: 0...5A Output: 0...20mA
WEIGEL EQ48-MESSB:10A-SKALA:0-10A+STTX*
WEIGEL DUW2.1
WEIGEL LSP72K meas.range 4-20ma SCALEO-1000N/M
WEIGEL Type: VQ72K 0-750V Production ID: 1TNS08030129R1
WEIGEL EQ96K 0-500V
WEIGEL AC 0..500V (Moving-iron meter AC 0..500 V )
WEIGEL SHUNT 1500A/60MV/CLASS 0.5
WEIGEL 869.7330.1 50KA/250ms
WEIGEL DAS10-40P1R NR:943622-003
WEIGEL AU2.0 0-1A
WEIGEL DA12-NA40/F10R 72*24
WEIGEL 電流變送器/A1U2.0
WEIGEL EQ96K 100/120V 0-20/24kV
WEIGEL SHUNT 6000A/60MV/CLASS 0.5
WEIGEL EQ72K 50/100/5A
WEIGEL EQ96K500V
WEIGEL SHUNT ISO.PLATE ARGE 155X90X6MM, 870-93260(R021安裝盤)
上海祥樹WEIGELFQ96/2
上海祥樹WEIGELFQ96/2