Technical Data
ANCA Motion
DS619-0-00-0019 - Rev 0
167
12
12.7.12
AMD2000 9A drive mounting hole positions
and physical dimensions
12.8
24V Control Circuit Supply
The maximum current that can be drawn from this supply is 500mA total. Note that if a motor with a brake is
required this may be insufficient current to release the brake, so an external power supply will be required. Also
note that if overloaded the poly-fuse in the drive will present a high resistance and there will no longer be 500mA
available until the load is removed.
12.9
Effect of AC Input Voltage on DC Bus Ripple
The AMD 2000 drive works by rectifying AC into DC to generate what is known as a DC Bus. This is smoothed
by the bus capacitance and then 6 switches turn on in such a manner that rotation of the motor occurs. Because
there is a finite capacitance in the drive there will always be voltage ripple when the drive is providing energy to a
motor. The higher the input voltage is to the drive, and the more power that is drawn from the drive, the higher
the ripple. Specified in the graphs below is voltage droop, which is the value the voltage drops at its lowest
point. These are all for full rated current for both of the drives. Because the power output has dropped as the
voltage decreases the ripple drops also, which is somewhat counter-intuitive. For a constant power load
decreasing input voltage would result in increased ripple.