Electrically driven lift truck
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United States of America Patent
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-
Jun 10, 1997
Issued Date -
N/A
app pub date -
Jan 10, 1995
filing date -
Jan 19, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lift truck has a tractive-power electric motor, an electric motor which actuates a pump for the hydraulic circuits, and batteries which supply the electric motors. In order to obtain a long working life as well as reliability and a high performance, the tractive-power motor or both motors are asynchronous and there are provided devices for sensing the angular positions and angular velocities of the motors and an electronic control unit connected to the sensor devices for controlling the power supplies to the motors in dependence on required velocities for the motors and on the basis of data provided by the sensor devices.
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