Trane TR200 - Page 158

[6] 4.0 kHz
[7] * 5.0 kHz
[8] 6.0 kHz
[9] 7.0 kHz
[10] 8.0 kHz
[11] 10.0 kHz
[12] 12.0 kHz
[13] 14.0 kHz
[14] 16.0 kHz
14-03 Overmodulation
Option: Function:
[0] Off Selects no overmodulation of the output voltage in order to avoid torque
ripple on the motor shaft.
[1] * On The overmodulation function generates an extra voltage of up to 8% of
U
max
output voltage without overmodulation, which results in an extra
torque of 10–12% in the middle of the oversyncronous range (from 0%
at nominal speed rising to approximately 12% at double nominal speed).
14-04 PWM Random
Option: Function:
[0] * Off No change of the acoustic motor switching noise.
[1] On Transforms the acoustic motor switching noise from a clear ringing tone
to a less noticeable ‘white’ noise. This is achieved by slightly and ran-
domly altering the synchronism of the pulse width modulated output
phases.
14-1* Line Power On/Off
Parameters for configuring line failure monitoring and handling.
14-10 Mains Failure
Option: Function:
Select the function at which the adjustable frequency drive must act,
when the threshold set in par.14-11
Mains Voltage at Mains Fault has
been reached or a
Line Failure Inverse command is activated via one of
the digital inputs (par. 5-1*).
[0] * No function The energy left in the capacitor bank will be used to "drive" the motor,
but will be discharged.
[1] Ctrl. ramp-down The adjustable frequency drive will perform a controlled ramp-down.
par.2-10
Brake Function must be set to Off [0].
[3] Coasting The inverter will turn off and the capacitor bank will back up the control
card, thus ensuring a faster restart when line power is reconnected (for
short power zags).
Parameter Description
TR200 Programming Guide 4-121