Curtis 1222 Manual, os 15
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2 9 J A N U A R Y 2 0 1 3 D R A F T
OVERVIEW
The Curtis Model 1222 is an AC induction motor controller for electric
power steering (EPS) systems. In these “steer by wire” systems, the AC steering
gearmotor functions as an actuator to change the angle of the vehicle’s steered
wheel(s) and thus change the direction of travel. The 1222 performs as the
steering system controller, interpreting the steering command input and wheel
position feedback, then driving the steering motor to move the steered wheel(s)
to the desired position.
The Curtis 1222 controller is designed for use as an electric power steer
-
ing controller for 300–1400W AC induction gearmotors with overall gear
reductions between 50:1 and 800:1 on vehicles using Curtis VCL AC motor
controllers. Intended applications are material handling vehicles such as reach
trucks, order pickers, stackers, “man up” warehouse trucks, and other similar
industrial vehicles.
1
1 — OVERVIEW
Fig. 1 Curtis 1222 electric
steering controller.
Advanced Motor Control
✓ Absolute Position (pedestrian stacker) or Relative Position
(reach truck) control modes.
✓ Supports >360° multi-turn steering mode.
✓ Indirect Field Orientation (IFO) vector control algorithm
provides maximum possible torque while ensuring maximum
efficiency and accurate current control.
More Features
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