Sauer Danfoss H1 - Page 15

15
11063344 • Rev EA • Dec 2012
H1 Axial Piston Pump, Size 045/053, Single
Technical Information
General Technical Specications
Forward-Neutral-Reverse
(FNR) Electric Control
Options
A9 (12 V)/B1 (24 V)
(continued)
Control response
H1 controls are available with optional control passage orices to assist in matching
the rate of swashplate response to the application requirements (e.g. in the event of
electrical failure). Software ramp or rate limiting should be used to control vehicle
response in normal operation. The time required for the pump output ow to change
from zero to full ow (acceleration) or full ow to zero (deceleration) is a net function of
spool porting, orices, and charge pressure. A swashplate response table is available
for each frame indicating available swashplate response times. Testing should be
conducted to verify the proper software and orice selection for the desired response.
H1 pumps are limited in mechanical oricing combinations. Software is envisioned
as the means to control the swashplate response in normal operating conditions.
Mechanical servo orices are to be used only for fail-safe return to neutral in the event of
an electrical failure.
Typical response times shown below at the following conditions:
∆p = 250 bar [3626 psi]
Viscosity and temperature = 30 mm
2
/s (50 °C) [141 SUS (122 °F)]
Charge pressure = 20 bar [290 psi]
Speed = 1800 min
-1
(rpm)
Pump output  ow direction vs. control signal
Shaft rotation CW CCW
Coil energized* C1 C2 C1 C2
Port A in out out in
Port B out in in out
Servo port pressurized M5 M4 M5 M4
* For coil location see installation drawings.
T000 140E
Response times
Stroking direction 0.8 mm [0.03 in] Ori ce 1.3 mm [0.05 in] Ori ce No ori ce
Neutral to full  ow 1.8 s 0.9 s 0.5 s
Full  ow to neutral 1.6 s 0.8 s 0.4 s
T000 179E
Solenoid data
Voltage 12 V 24 V
Minimum supply voltage 9.5 Vdc 19.0 Vdc
Maximum supply voltage (continuous) 14.6 Vdc 27.0 Vdc
Maximum current 1050 mA 500 mA
Nominal coil resistance @ 20 °C [70 °F] 8.4 Ω 34.5 Ω
PWM Range 70-200 Hz
PWM Frequency (preferred)* 100 Hz
IP Rating (IEC 60 529) + DIN 40 050, part 9 IP 67
IP Rating (IEC 60 529) + DIN 40 050, part 9
with mating connector
IP 69K
* PWM signal required for optimum control performance.
T000 139E