H37: Load Inertia Rate
Range: 0 - 2 (Default: 0)
Description: This parameter is used by many drive functions such as Sensorless Vector
control and Speed Search.
During Speed Search operation if overvoltage trips occur increase the value
of this parameter and retest.
For better control performance, this value must be set as exact as possible.
Set ‘0’ for loads that having load inertia less than 10 times of motor inertia.
Set ‘1’ for loads that having load inertia about 10 times of motor inertia.
Set ‘2’ for loads that having load inertia larger than 10 times of motor
inertia.
If the application requires more rapid deceleration, use dynamic braking unit
or resistor.
As the loads get heavier, the speed gap between rated RPM and
synchronous speed is widens (see figure below). This function compensates
for the inherent slip.
H39: Carrier Frequency Select
Range: 1-15kHz (Default: 3kHz)
Description: This parameter affects the audible sound of the motor, noise emission from
the drive, drive temp, and leakage current. If the set value is higher, the
motor sound is quieter but the noise from the drive and leakage current will
become greater.
If this paramter is set above 10kHz, reduce the rated output current by 5%
for each 1kHz above 10kHz. Do not set the carrier frequency below 1.5kHz
when H40 [Control mode selection] is set to Sensorless Vector., otherwise
poor performance can result.
94
6 - Parameter Descriptions
RPM
Motor Rated
RPM
Slip
Compensation
Load
Synchronous
Speed
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