MR Dampers

LORD RD-8041-1

The LORD RD-8041-1 long stroke damper is a continuously variable damper controlled by the increase in yield strength of the MR fluid in response to magnetic field strength.

English SI
Stroke 2.91 in 74 mm
Extended Length 9.76 in 248 mm
Max Tensile Strength 2000 lbf 8896 N
Damper Force (5 cm/sec @ 1 A) >550 lbf >2447 N
Damper Force (20 cm/sec @ 0 A) <150 lbf <667 N
Max Operating Temperature 160° F 71° C
Input Current (Continuous for 30 Seconds) 1 A max 1 A max
Input Current (Intermittent) 2 A max 2 A max
Input Voltage 12 VDC 12 VDC
Resistance (@ Ambient Temperature) 5 Ω 5 Ω
Resistance (@ Max Operating Temperature) 7 Ω 7 Ω
200KN MR Damper

This large-scale MR damper is manufactured by LORD corporation. It can provide control force of over 200 kN (45 kip) with a low voltage, current driven command signal.

English SI
Stroke 23 in 584 mm
Extended Length 58 in 1.47 m
Weight 615 lbf 2736 N
Damper Force 45 kips 200 kN
Coil Resistance 4.8 Ω 4.8 Ω
Coil Inductance ≈ 5 H ≈ 5 H
LORD Wonderbox

The Wonder Box provides a closed-loop current control to compensate for changing electrical loads up to the limits of the power supply.

Input Receptacle 2.1 mm Female
Pulse With Modulation Frequency 30 kHz
Input Voltage/Output Current (4 Ohm) ~ 0.4-0.6 V / 0 mA
2 V / 750 mA
4.3 V / 1800 mA
Input Voltage/Output Current (8 Ohm) ~ 0.4-0.6 V / 0 mA
1.6 V / 600 mA
3.2 V / 1300 mA
Max Output Current 2 A
Advanced Motions Control PS2X3W72 Power Supply
Input 12 VAC
50-60 Hz
Output 72 VDC
3 A
220 W
TRIAD WDU12-1200 Class 2 Power Supply
Input 120 VAC
60 Hz
23.5 W
Output 12 VDC
1200 mA