Sauer-Danfoss series S90 axial piston pumps

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non feeDbaCk PRoPoRtionaL eLeCtRiC ContRoL (nfPe) Series 90 Axial Piston Pumps Technical Information Control options 32 520L0603 • Rev FC • August 2008 The Non Feedback Proportional Electric (NFPE) control is an electrical automotive control in which an electrical input signal activates one of two proportional solenoids that port charge pressure to either side of the pump servo cylinder. The NFPE control has no mechanical feedback mechanism. The pump displacement is proportional to the solenoid signal current, but it also depends upon pump input speed and system pressure. This characteristic also provides a power limiting function by reducing the pump swashplate angle as system pressure increases. A typical response characteristic is shown in the accompanying graph. Resistance Table supply voltage Coil Resistance 12 V 5.4 Ohms 24 V 21.6 Ohms NFPE Schematic M1 M2 M5 M4 M6 M3 L1 S L2 A B P003 174
non feeDbaCk PRoPoRtionaL eLeCtRiC ContRoL (nfPe) (continued) Series 90 Axial Piston Pumps Technical Information Control options features and benefits of the nfPe control when used with sauer-danfoss microcontroller • Creep mode • Two automotive control ramps via mode switch • Engine overspeed protection • Electric control • Anti-stall function • Smooth operation • Electronic ramp control is superior to hydraulic control with orifices input signal requirements The NFPE control requires a pulse-width-modulated (PWM) input current to optimize performance. The recommended PWM frequency is 200 Hz. The minimum PWM frequency is 80 Hz. The NFPE control uses an AMP® Junior Power Timer connector. The solenoids are compatible with <strong>Sauer</strong>-<strong>Danfoss</strong> microcontrollers and joysticks. NFPE pump displacement vs. input signal shaft rotation Cw CCw active solenoid a b a b Port A flow Out In In Out Port B flow In Out Out In Servo cylinder M5 M4 M5 M4 520L0603 • Rev FC • August 2008 Solenoid data voltage Control current start end max 12 V ~ 440 mA 1290 mA 1500 mA 24 V ~ 220 mA 645 mA 750 mA 33
Page 1 and 2: Series 90 Axial Piston Pumps Techni
Page 3 and 4: GeneRaL DesCRiPtion teCHniCaL sPeCi
Page 5 and 6: seRies 90 famiLy of PumPs anD motoR
Page 7 and 8: PiCtoRiaL CiRCuit DiaGRam Control h
Page 9 and 10: fLuiD sPeCifiCations Series 90 Axia
Page 11 and 12: HyDRauLiC fLuiDs temPeRatuRe anD vi
Page 13 and 14: ReseRvoiR (continued) Case DRain si
Page 15 and 16: sHaft avaiLabiLity anD toRque Ratin
Page 21 and 22: auxiLiaRy mountinG PaDs Series 90 A
Page 23 and 24: 3 -Position (fnR) eLeCtRiC ContRoL
Page 25 and 26: eLeCtRiC DisPLaCement ContRoL (eDC)
Page 27 and 28: HyDRauLiC DisPLaCement ContRoL (HDC
Page 29 and 30: manuaL DisPLaCement ContRoL (mDC) (
Page 31: non-LineaR manuaL DisPLaCement Cont
Page 35 and 36: fRame size 042 (continued) Coupling
Page 37 and 38: fRame size 055 (continued) Series 9
Page 47 and 48: fRame size 100 (continued) COUPLING
Page 51 and 52: fRame size 180 204 [8.03] 181 [7.13
Page 55 and 56: fRame size 250 212 maximum [8.35] "
Page 59 and 60: CoveR PLate C4 maximum C4 maximum C
Page 63 and 64: inteGRaL PRessuRe fiLteR Gauge port
Page 65 and 66: fRame size 075 nfPe (continued) Ser
Page 67 and 68: fRame size 075 nfPe (continued) Thr

Sauer-Danfoss series S90 axial piston pumps

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