Yaskawa CIMR-LU Drives - Manual (Page 11)

i Preface & General Safety
YASKAWA ELECTRIC TOEP C710616 38F YASKAWA AC Drive L1000A Quick Start Guide 11
■ General Application Precautions
Motor Selection
Drive Capacity
The output current should not exceed 150% of the drive rated current. Select a drive that can output enough current when
accelerating a load at 100%.
For specialized motors, make sure that the motor rated current is less than the rated output current for the drive.
Starting Torque
The startup and acceleration characteristics of the motor are restricted to the drive's overload current rating (150% rated
current for 60 s).
The overload rating for the drive determines the starting and accelerating characteristics of the motor. Expect lower
torque than when running from line power. To get more starting torque, use a larger drive or increase both the motor and
drive capacity.
Stopping
Fast Stop
When the drive faults out, a protective circuit is activated and drive output is shut off. This, however, does not stop the
motor immediately. A mechanical brake may be required to stop the motor if Fast Stop deceleration is insufficient.
Mechanical Brake
A mechanical brake is required to prevent the elevator from free falling during a drive fault condition.
Repetitive Starting/Stopping
Elevators and other applications with frequent starts and stops often approach 150% of their rated current values. Heat
stress generated from repetitive high current will shorten the life span of the IGBTs. The expected lifetime for the IGBTs
is about 3 million start and stop cycles with a default carrier frequency of 2 kHz (CIMR-LU2A0346, 2A0415, 4A0450 to
4A0605, 5A0099 to 5A0200), 5 kHz (CIMR-LU4A0112 to 4A0370, 5A0077), or 8 kHz (CIMR-LU2A0008 to 2A0115,
4A0005 to 4A0091, 5A0003 to 5A0062) and a 150% peak current.
Yaskawa recommends lowering the carrier frequency, particularly when audible noise is not a concern. It is beneficial to
reduce the load, increase the acceleration and deceleration times, or switch to a larger drive to 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.
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.
Do not lift the drive up while the cover is removed.
This can damage the terminal board and other components.
Do not expose the drive to halogen group disinfectants.
Failure to comply may cause damage to the electrical components in the drive.
Do not pack the drive in wooden materials that have been fumigated or sterilized.
Do not sterilize the entire package after the product is packed.
NOTICE
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