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AFMNA0AA – EPS-BLI HYG – User Manual
5 SYSTEM
COMPONENTS
The integrated steering system needs the following components in order to work. The
following list describes the complete equipment.
5.1 Steering motor and gear box
The integrated steering system includes a three phase brushless AC motor
(Pn = 600 W @ 3000 rpm S2 – 1 h) with an absolute position sensor on the motor
shaft.
The steering motor shaft is coupled to an integrated gear box. The gear ratio is 1:43.
5.2 E-steering
motor
controller
It consists of a control unit working with a nominal battery voltage in the range 12.5
through 35 V and a maximum current of 50 Arms. With a parameter (see MAXIMUM
CURRENT), it is possible to set the maximum current limitation to a lower value.
Figure 5.2-1
5.3 Feedback
sensors
The feedback sensors arranged to work in closed-loop manual mode consist of:
1) A feedback position sensor on the motor shaft.
2) A straight-ahead toggle switch.
5.3.1
Feedback position sensor
The feedback position sensor is a redundant contactless rotary sensor. It is based on
an integrated Hall element array. The angular position of a simple two-pole magnet is
translated into analogue output voltages and used by the controller to know the real-
time steered wheel position.
