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i.2 General Safety
YASKAWA ELECTRIC
SIEP C710636 02B YASKAWA U1000 Technical Manual
23
Emergency Stop
When the drive faults out, the output is shut off. This, however, does not stop the motor immediately. Some type of
mechanical brake may be needed if it is necessary to halt the motor faster than the Fast Stop function is able to.
Repetitive Starting/Stopping
Cranes (hoists), elevators, punching presses, and other such applications with frequent starts and stops often exceed
150% of their rated output current values. Heat stress generated from repetitive high current can shorten the life span of
the IGBTs. The expected lifetime of the IGBTs is about 8 million start and stop cycles with a 4 kHz carrier frequency (a
3 kHz carrier frequency for CIMR-U
4
0477 to 4
0930) and a 150% peak current.
For crane-type applications using an inching function in which the motor is quickly started and stopped, Yaskawa
recommends selecting a large enough drive so that peak current levels remain below 150% of the drive rated current.
Run only one motor from each drive when using vector control. It is not possible to run more than one motor from one
drive with vector control.
■
Carrier Frequency Derating
When the carrier frequency of the drive is increased above the factory default setting, the rated output current of the drive
should be reduced.
Refer to Carrier Frequency Derating on page 462
for details.
■
Installation
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.
Installation Direction
The drive should be installed upright as specified in the manual. For more information on installation,
refer to
Mechanical Installation on page 50
.
■
Settings
Motor Code
If using permanent magnet motors, make sure that the proper motor code has been set to parameter E5-01 before
performing a trial run.
Upper Limits
The drive is capable of running the motor up to 400 Hz. Due to the danger of accidentally of operating at high speed, be
sure to set the upper limit for the frequency. The default setting for the maximum output frequency is 60 Hz (50 Hz for
CIMR-UB
only).
DC Injection Braking
Motor overheat can result if there is too much current used during DC Injection Braking, or if the time for DC Injection
Braking is too long.
Acceleration/Deceleration Times
Acceleration and deceleration times are affected by how much torque the motor generates, the load torque, and the
moment of inertia. Set a longer accel/decel time when Stall Prevention is enabled. The accel/decel times are lengthened
for as long as the Stall Prevention function is operating. For faster acceleration and deceleration, use a larger drive and
motor.
■
General Handling
Wiring Check
Be sure to perform a final check of all sequence wiring and other connections before turning the power on. Make sure
there are no short circuits on the control terminals (+V, AC, etc.), as this could damage the drive.
SIEP_C710636_02B_1_0.book 23 ページ 2015年11月25日 水曜日 午後4時56分