●
Overtemperature protection for inverter and motor
●
Low and high battery voltage limit
●
Speed feedback
●
Zero speed drive in ramp
●
Standby for supply
●
Diagnostics and stored error code
●
Power line fault detection (fuse/contactor)
●
Continuous temperature measuring (controller and motor)
●
Short circuit protection.
9.4.4 ITC characteristics
The system developed by SME allows you to get high performance, thanks to the following
specific features:
●
DSPs high performance control with custom software, loaded in the internal FLASH
memory.
●
One serial asynchronous RS232 interface for PC communication in order to obtain:
○
parameters modification, in order to customise the system
○
diagnosis functionalities
○
software updates
●
One accelerator (0 - 12 V) and all on/off emergency micro-switches interface
●
One encoder (0 - 5 V) interface for the motor
●
Motor torque control by speed and current loop
●
Controlled acceleration and deceleration ramps of the motor in order to avoid
uncontrolled jolts of the load due to oversights of the operator
●
Automatic truck speed limitation depending on steering angle
●
Ramp stop of the lift truck
●
Automatic energy recovery at each truck braking
●
LIN (Local Interconnect Network) display interface.
●
Automatic truck speed limitation, depending on the height of the load lifted.
●
Automatic truck maximum speed limitation, in function of:
○
limitation inputs (height, weight, etc...)
○
battery voltage level
○
any thermal alarm
●
Full protection of drives against overcurrent of the motor, overheating of the power
transistors and both maximum and minimum battery voltage.
●
Low maintenance costs by using AC induction motors.
●
A CAN network, which can be used to build more complex control systems with
other control boards or to connect particular kinds of sensors or devices, giving
further flexibility.
PRELIMINARY VERSION 57
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