Increased Magnetic Excitation Deceleration - Mitsubishi Electric FR-F820-00077 Instruction Manual

(G) Control parameters
5.13.12

Increased magnetic excitation deceleration

Increase the loss in the motor by increasing the magnetic flux at the time of deceleration. Decelera-
tion time can be reduced by suppressing the stall prevention (overvoltage) (oL).
It will make possible to reduce the deceleration time without a brake resistor.
Pr.
660
G130
661
G131
662
G132
Setting of increased magnetic excitation rate (Pr. 660, Pr. 661)
● To enable the increased magnetic excitation deceleration, set Pr. 660 "Increased magnetic excita-
tion deceleration operation selection" = "1".
● Set the amount of excitation increase in Pr. 661 "Magnetic excitation increase rate". Increased
magnetic excitation deceleration will be disabled when Pr. 661 = "0".
● When the DC bus voltage exceeds the increased magnetic excitation deceleration operation level
during the deceleration, excitation is increased in accordance with the setting value in Pr. 661.
● The increased magnetic excitation deceleration will continue even if the DC bus voltage goes
under the increased magnetic excitation deceleration operation level during strengthened ex-
citation deceleration.
Inverter
200 V class
400 V class
With 500 V input
Tab. 5-288: Strengthened excitation deceleration operation level
● When the stall prevention (overvoltage) occurs during the increased magnetic excitation decel-
eration operation, increase the deceleration time or raise the setting value of Pr. 661. When the
stall prevention (overcurrent) occurs, increase the deceleration time or lower the setting value of
Pr. 661.
● Increased magnetic excitation deceleration is enabled with V/F control, Advanced magnetic flux
vector control.
NOTE The increased magnetic excitation deceleration will be disabled in the following conditions:
During PM motor control, power failure stop, operation with FR-HC2/FR-CV, energy saving opera-
tion, Optimum excitation control.
5 - 564
Name
Increased magnetic
excitation deceleration
operation selection
Magnetic excitation
increase rate
Increased magnetic
excitation current level
Increased magnetic excitation deceleration operation level
340 V
680 V
740 V
V/F V/F V/F
Initial Setting
Description
value range
0 Without increased magnetic excitation deceleration
0
1 With increased magnetic excitation deceleration
0 to 40% Set the increase of excitation.
9999
9999 Magnetic excitation increase rate 10%
The increased magnetic excitation rate is
automatically lowered when the output current
100% 0 to 300%
exceeds the setting value at the time of increased
magnetic excitation deceleration.
Parameters
Magnetic flux Magnetic flux Magnetic flux