Parameter No. Function name Data
Default da-
ta
Unit
3004Hex-06Hex/
3009Hex-04Hex
1st Rated Voltage at Base Fre-
quency/2nd Rated Voltage at
Base Frequency
80 to 240 V (200 V class
series)
160 to 500 V (400 V class
series)
200
V
8-9-12
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 (3008Hex-46Hex) 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 (3008Hex-48Hex).
• By setting Magnetic Flux Level during Deceleration (3014Hex-5BHex) 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 (3004Hex-06Hex)/2nd Rated Voltage at Base Frequency
(3009Hex-04Hex) as 100%. When 100% is set, this function is disabled regardless of the setting of
Over-Excitation Control Selection during Deceleration Function Selection (3008Hex-4BHex).
Parameter No. Function name Data
Default da-
ta
Unit
3008Hex-48Hex
Over-Excitation Control Selec-
tion during Deceleration Func-
tion Selection
0: Disable
1: Enable
0 -
3004Hex-06Hex/
3009Hex-04Hex
1st Rated Voltage at Base Fre-
quency/2nd Rated Voltage at
Base Frequency
80 to 240 V (200 V class
series)
160 to 500 V(400 V class
series)
200 V
3014Hex-5BHex
Magnetic Flux Level during De-
celeration
100 to 300 120 %
Related function
Anti-regenerative Control Function Selection
(3008Hex-46Hex)
• Adjusting overexcitation control during deceleration
Set Over-Excitation Control Selection during Deceleration Function Selection (3008Hex-48Hex) to
“1: Enable,” and gradually keep increasing the set data of Magnetic Flux Level during Deceleration
(3014Hex-5BHex) 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 resistors.
8 Other Functions
8-107
M1 Series EtherCAT Type User’s Manual (I670)
8-9 Other Operation Functions
8
8-9-12 Overexcitation Control during Deceleration
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