AFMNA0AA – EPS-BLI HYG – User Manual Page – 7/75
2 SPECIFICATIONS
2.1 General features
EPS BLI is an integrated electrical steering controller, thought to be mounted axially
onto the steering motor. The main application is as steering controller for any kind of
forklift trucks including counterbalanced trucks. It can work steer by wire but also steer
assist (with embedded software modification). The motor technology is brushless AC
motor. 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 hydraulic steering system, increasing the efficiency of
the full truck even up to 10% - 15%. Furthermore, it opens the door to an easy and
flexible customization approach. Redundancy in the microcontrollers and in the
sensors make possible to fulfill ISO13849 Category # 3 and PLd requirements.
Figure 2.1-1.
The main inverter features are:
Digital control using two microcontrollers.
Both microcontrollers connected over CAN bus.
#2 Analog (or PWMs) inputs for a quasi-redundant steering handle sensor.
#1 PWM output (CNA#14): general purpose, voltage controlled and short
circuit protected (max 0.7 A @ Vbatt ≤ 48 V).
#1 PWM output (CNA#10): driver of the force feedback device, current
controlled and overcurrent protected (max 1.3 A @ Vbatt ≤ 48 V).
#1 Digital output (CNA#9) as positive breaker for CNA#14 and CNA#10,
overcurrent protected (max 2 A @ Vbatt ≤ 48 V).
#1 13.5 V DC supply source (max 240 mA).
#1 Spare digital input (CNA#12) with inner 3.3 kΩ pull-up to 13.5 V.
#1 Embedded steering motor sensor (position sensor).
#1 Embedded motor thermal sensor: KTY84-130 analog sensor.
#1 Embedded steered-wheel home-position sensor.
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