Danaher Motion SuperDrive ACS24 Series, Руководство пользователя

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26.04.2005
Overview
2 OVERVIEW
In a typical CAN based system (see Figure 3 ), one AC SuperDrive directs the motion of a lift
motor powering a hydraulic pump while a second AC SuperDrive directs the motion of a traction
motor coupled to a drive wheel. AC SuperDrives convert DC power from the truck’s battery to
three phase AC power at the frequencies and currents necessary to drive their respective
induction motors as commanded.
Figure 3. The Truck Drive System
The main contactor, under control of the truck controller, supplies battery power to the power
conversion section of the drives and removes battery power under certain error and fault
conditions. An onboard fuse protects each drive against short circuit faults in the power
conversion section.
A PTC (Positive Temperature Coefficient) resistance limits inrush current to a bank of filter
capacitors when power is first turned on via the disconnect switch.
The key start contactor controls application of power to the control electronics section of the AC
SuperDrive.
Each motor provides feedback of its speed, direction and temperature to the AC SuperDrive for
control and monitoring purposes. A speed encoder integrated into each motor produces speed
and direction feedback signals and a temperature sensor (PTC resistance) embedded in the
stator winding provides an indication of motor temperature.
The truck controller, based on input from operator controls and other criteria, transmits speed,
braking and other commands to the AC SuperDrives over the CAN Bus. The truck controller
regularly monitors drive status and initiates corrective action upon recognition of a warning/error
User's Guide 1.0 Item No.
89Y05120A 13