Parker AC890 Product Manual page 135

Operating the Drive
A Single Motor System
The simplest configuration for 4-Q Regen control is a single 890 Regen drive acting as the unity power
factor supply, connected via the DC link to another 890 driving the application.
Applications of single motor 4-Q Regen systems include :
 Hoist and Elevators
 Dynamometer test rigs
 Unwind Stands
 Installations that would otherwise require a Harmonic Power Filter
In this system, the two 890 drives are matched in power. The 4-Q Regen drive supplies the full motoring
and regenerating requirement of the load.
6-31
Page
U
4-Q Active Front End
V
W
External Pre- Charge
Control
Boosted Common
DC Link Supply
DC+
890 Drive
720V
(4-Q Power Supply)
DC -
890SD (Standalone) Drive: Frame G, H & J
DC+
DC
890 Drive
Link Fuses
DC -
U V W
Motor Load AC Motor