AF9ZP0BA - EPS-ACW REACH TRUCK - User Manual
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1 INTRODUCTION
Eps_acw is an electrical steering controller thought to be mounted in a “piggy
back” arrangement with its steering motor (see Figure 2.1). Main application is to
steer any kind of forklift trucks including counterbalanced trucks. It can work
steer by wire but also steer assist (on demand). The motor technology can be
standard induction motor but also brushless permanent magnet (on demand).
Integrating motor and controller minimizes the wiring, reduces the installation
time and improves reliability.
An electrical steering system saves the consumption given by the losses in the
priority valve and in the pump motor of a hydraulics steering system increasing
the efficiency of the full truck even up to 10-15%. Furthermore, it opens the door
to an easy and wide customization approach. Redundancy in the microcontroller
and in the sensors make possible to fulfil ISO13849 category # 3 and PLd
requirements. On demand, and particularly suited for closed loop application
(position control mode), the same system may be supplied with two internal
encoders in the motor.