Yaskawa iQpump Micro User Manual
Page 40
4000
600
0
60
400
Drive Capacity (kVA)
Power Supply
Capacity (kVA)
Power supply harmonics
reactor required
Reactor
unnecessary
Figure i.1 Installing a Reactor
Drive Capacity
For specialized motors, make sure that the motor rated current is less than the rated output current for the drive.
When running more than one motor in parallel from a single drive, the capacity of the drive should be larger than [total motor
rated current × 1.1].
Starting Torque
The overload rating of the drive determines the starting and accelerating characteristics of the motor. Expect lower running
torque than when running the motor from line power. To get more starting torque, use a larger drive or increase both the motor
and drive capacity.
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.
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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.
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Installation
Enclosure Panels
Keep the drive in a clean environment by installing the drive in an enclosure panel or selecting an installation area free of
airborne dust, lint, and oil mist. Be sure to leave the required space between drives to provide for cooling, and take proper
measures so the ambient temperature remains within allowable limits and keep flammable materials away from the drive.
Yaskawa offers protective designs for drives that must be used in areas subjected to oil mist and excessive vibration. Contact
Yaskawa or your Yaskawa agent for details.
Installation Direction
NOTICE: Install the drive upright as specified in the manual.
Refer to Mechanical Installation on page 50
for more information on
installation. Failure to comply may damage the drive due to improper cooling.
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Settings
Upper Limits
NOTICE: The drive is capable of running the motor up to 400 Hz. Be sure to set the upper limit for the frequency of the drive to prevent the
possible danger of accidentally operating equipment at higher than rated speed. The default setting for the maximum output frequency is
60 Hz.
Lower Limits
NOTICE: Many pumps have a minimum safe operating speed. Be sure to properly set the minimum pump speed in to protect the pump
from damage.
DC Injection Braking
NOTICE: Excessive current during DC Injection Braking and excessive duration of DC Injection Braking can cause motor overheat.
i.2 General Safety
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YASKAWA TOEP YAIQPM 03B YASKAWA AC Drive - iQpump Micro User Manual