Yaskawa J1000 Compact Vector Control Drive - Manual (Page 19)

n Emergency/Fast Stop
During a drive fault condition, a protective circuit is activated and drive output is shut off.
The motor may coast to a stop or attempt to decelerate depending on parameter settings. If
the emergency/fast stop cannot stop the load as fast as desired, a customer-supplied
mechanical brake may be required. Test emergency stop circuitry before putting drive into
operation.
n Options
The B1, B2, +1, +2, and +3 terminals are used to connect optional power devices. Connect
only devices compatible with the drive.
n Repetitive Starting/Stopping
Applications with frequent starts and stops often exceed 150% of their rated current values.
Heat stress generated from repetitive high current can shorten the life span of the IGBTs. The
expected lifetime for the IGBTs is about 8 million start and stop cycles with a 4 kHz carrier
frequency and a 150% peak current.
Yaskawa recommends lowering the carrier frequency, particularly when audible noise is not
a concern. The user can also choose to reduce the load, increase the acceleration and
deceleration times, or switch to a larger drive. This will help keep peak current levels under
150%. Be sure to check the peak current levels when starting and stopping repeatedly during
the initial test run, and make adjustments accordingly.
u Installation Environment
n Enclosure Panels
Keep the drive in a clean environment by either selecting an area free of airborne dust, lint,
and oil mist, or install the drive in an enclosure panel. Be sure to leave the required space
between drives to provide for cooling, and that proper measures are taken so that the ambient
temperature remains within allowable limits. Keep flammable materials away from the drive.
If the drive must be used in an area where it is subjected to oil mist and excessive vibration,
protective designs are available. Contact Yaskawa or your Yaskawa agent for details.
n Installation Direction
The drive should be installed upright as specified in the manual.
i.3 Application Precautions
YASKAWA ELECTRIC TOEP C710606 47C YASKAWA AC Drive – V1000 Quick Start Guide 19