Parameter No. Function name Data
Default da-
ta
Unit
F05/A03
1st Rated Voltage at
Base Frequency/2nd
Rated Voltage at Base
Frequency
80 to 240 V: Output an A
VR-controlled
voltage (for 200 V class series)
160 to 500 V: Output an AVR-controlled
voltage (for 400 V class series)
200 V
7-9-12
Overexcitation Control during Deceleration
Overexcitation control during deceleration is a function that decreases the regenerative energy to be
fed back to the inverter by forcing the motor during deceleration to be in an overexcited state. It ena-
bles you to shorten the deceleration time without use of external braking resistors.
If, in spite of using this function, the operation cannot be performed at the target deceleration time, or if
an overcurrent occurs, use the optional braking resistors.
Avoid frequent acceleration and deceleration as it may cause the motor to burn.
This function is enabled in V/f control, V/f control with speed sensor, and vector control with speed
sensor
. If Anti-regenerative Control Function Selection (H69) in the torque limit method is set to “2:
Torque limit control with forced stop after three times deceleration time has passed” or “4: Torque limit
control without forced stop,” this function is disabled.
• When using this function, set “1: Enable” to Over-Excitation Control Selection during Deceleration
Function Selection (H71).
• By setting Magnetic Flux Level during Deceleration (d90) to higher than 100%, the overexcitation
state of the motor is adjusted. Set this as a percentage with the set value of the 1st Rated Voltage at
Base Frequency (F05)/2nd Rated Voltage at Base Frequency (A03) as 100%. When 100% is set,
this function is disabled regardless of the setting of Over-Excitation Control Selection during Decel-
eration Function Selection (H71).
Parameter No. Function name Data
Default da-
ta
Unit
H71
Over-Excitation Control
Selection during Decel-
eration Function Selec-
tion
0: Disable
1: Enable
0 -
F05/A03
1st Rated Voltage at
Base Frequency/2nd
Rated Voltage at Base
Frequency
80 to 240 V: Output an A
VR-controlled
voltage (for 200 V class series)
200 V
160 to 500 V: Output an AVR-controlled
voltage (for 400 V class series)
d90
Magnetic Flux Level dur-
ing Deceleration
100 to 300 % 120 %
Related function H69
• Adjusting overexcitation control during deceleration
Set Over-Excitation Control Selection during Deceleration Function Selection (H71) to “1: Enable,”
and gradually keep increasing the set data of Magnetic Flux Level during Deceleration (d90) so as
to approach the desired deceleration time. If, in spite of using this function, the operation cannot be
performed at the target deceleration time, or if an overcurrent occurs, use the external braking resis-
tors.
7 Other Functions
7-122
M1 Series Standard Type User's Manual (I669)
To Next Page
Loading...
Need help?
General
