Control Response; Response Time, Fnr 045/053 - Danfoss H1P 045 Technical Information

Technical Information
H1 Axial Piston Single Pumps, Size 045/053
Control Options
© Danfoss | May 2017
Solenoid data
Voltage
Minimum supply voltage
Maximum supply voltage (continuous)
Maximum current
Nominal coil resistance @ 20 °C [70 °F]
PWM Range
*
PWM Frequency (preferred)
IP Rating (IEC 60 529) + DIN 40 050, part 9
Bi-directional diode cut off voltage
*
PWM signal required for optimum control performance.
Pump output flow direction vs. control signal
Shaft rotation
*
Coil energized
Port A
Port B
Servo port pressurized
*
For coil location see Installation drawings

Control Response

H1 controls are available with optional control passage orifices to assist in matching the rate of
swashplate response to the application requirements (e.g. in the event of electrical failure). The time
required for the pump output flow to change from zero to full flow (acceleration) or full flow to zero
(deceleration) is a net function of spool porting, orifices, 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 orifice selection for the desired response.
H1 pumps are limited in mechanical orificing combinations. Mechanical servo orifices are to be used only
for fail-safe return to neutral in the event of an electrical failure.
Typical response times at the following conditions:
∆p
Viscosity and temperature
Charge pressure
Speed

Response time, FNR 045/053

Stroking direction 0.8 mm [0.03 in] Orifice
Neutral to full flow 1.8 s
Full flow to neutral 1.6 s
12 V
9.5 V
DC
14.6 V
DC
1050 mA
8.4 Ω
70-200 Hz
100 Hz
IP 67 / IP 69K (part 9 with mating connector)
28 V
DC
CW
C1 C2
in out
out in
M5 M4
on page 47.
250 bar [3626 psi]
30 mm²/s [141 SUS] and 50 °C [122 °F]
20 bar [290 psi]
-1
1800 min (rpm)
1.3 mm [0.05 in] Orifice
0.9 s
0.8 s
24 V
19 V
DC
29 V
DC
500 mA
34.5 Ω
53 V
DC
CCW
C1 C2
out in
in out
M5 M4
No orifice
0.5 s
0.4 s
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