直流電機具有響應快速、較大的起動轉矩、 從零轉速至額定轉速具備可提供額定轉矩的性能,但直流電機的優點也正是它的缺點,因為直流電機要產生額定負載下恒定轉矩的性能,則電樞磁場與轉子磁場須恒維持90°,這就要藉由碳刷及整流子。碳刷及整流子在電機轉動時會產生火花、碳粉因此除了會造成組件損壞之外,使用場合也受到限制。交流電機沒有碳刷及整流子,免維護、堅固、應用廣,但特性上若要達到相當于直流電機的性能須用復雜控制技術才能達到。現今半導體發展迅速功率組件切換頻率加快許多,提升驅動電機的性能。微處理機速度亦越來越快,可實現將交流電機控制置于一旋轉的兩軸直交坐標系統中,適當控制交流電機在兩軸電流分量,達到類似直流電機控制并有與直流電機相當的性能。
此外已有很多微處理機將控制電機必需的功能做在芯片中,而且體積越來越小;像模擬/數字轉換器(analog-to-digital converter,adc)、脈沖寬度調制(pulse wide modulator,pwm)…等。直流無刷電機即是以電子方式控制交流電機換相,得到類似直流電機特性又沒有直流電機機構上缺失的一種應用。
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