Baldor 18H Series, Installation & Operating Manual

Page: 84 / 146

Section 1
General Information
Programming & Operation 4-17 MN718
Figure 4-3 Maximum Output Frequency vs PWM Frequency
50
100
200
300
400
500
600
700
800
900
1.00KHz 8.00KHz 16.00KHz
HZ
It is recommended that the PWM frequency parameter be set
to approximately16 times the maximum output frequency of
the control. The greater the ratio, the more sinusoidal the
output current waveform will be.
OUTPUT FREQUENCY
PWM FREQUENCY
Note: The output current rating of the control must be derated for high PWM
frequency operation as follows:
Standard Constant Torque and Standard Variable Torque: Linearly
derate to 10% between 2.5 and 5.0KHz (10% derating at 5.0KHz).
Quiet Constant Torque and Quiet Variable Torque: Linearly derate to
30% between 8.0 and 16KHz (30% derating at 16KHz).
1000
Caution: If an automatic restart of the motor control could cause injury to
personnel, the automatic restart feature should be disabled by
changing the Level 2 Miscellaneous block, Restart Auto/Man
parameter to manual.
Table 4-3 Level 2 Parameter Block Definitions
Continued
Block Title Parameter Description
MISCELLANEOUS Restart Auto/Man Manual - If a fault or power loss occurs, the control must be manually reset to resume
operation.
Automatic - If a fault or power loss occurs, the control will automatically reset to
resume operation.
Restart Fault/Hr The maximum number of automatic restart attempts before requiring a manual restart.
After one hour without reaching the maximum number of faults or if power is turned
off and on again, the fault count is rest to zero.
Restart Delay The amount of time allowed after a fault condition for an automatic restart to occur.
Useful to allow sufficient time to clear a fault before restart is attempted.
Factory Settings Restores factory settings for all parameter values. Select YES and press “ENTER” key
to restore factory parameter values. The keypad Display will show “Operation Done”
then return to “NO” when completed.
Note: When factory settings are reset, the Motor Rated Amps value is reset to
999.9 amps. This Level 2 Motor Data block parameter value must be
changed to the correct value (located on the motor rating plate) before
attempting to start the drive.