Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

Page: 931 / 1218

Parameters (G) Control parameters
FR-A800 5 - 729
5.16.13 Slip compensation
Slip of the motor is estimated from the inverter output current at the time of V/F control, and maintain
the rotation of the motor constant.
●
Slip compensation will become enabled by calculating the rated motor slip, and setting to Pr. 245.
Slip compensation is not performed when Pr. 245 = "0, 9999".
Pr. Name
Initial
value
Setting
range
Description
245
G203
Rated slip 9999
0.01 to 50% Set the rated motor slip.
0, 9999 Without slip compensation
246
G204
Slip compensation time
constant
0.5s 0.01 to 10s
Set the response time of the slip compensation.
Response will become faster when the value is
lowered, but the regenerative overvoltage (E.OV[])
error will occur more frequently when the load inertia
is larger.
247
G205
Constant-power range slip
compensation selection
9999
0
Do not perform slip compensation at constant output
range (frequency range higher than the frequency set
in Pr. 3).
9999
Perform the slip compensation of the constant
output range.
Rated slip =
Synchronized speed at the time of base frequency - rated rotation speed
× 100[%]
Synchronized speed at the time of base frequency
NOTES When the slip compensation is performed, the output frequency may become larger than the set
frequency. Set Pr. 1 "Maximum frequency" higher than the set frequency.
Slip compensation will be disabled in following cases.
At the times of stall preventive (oL, OL) operation, regeneration avoidance operation, auto tuning,
encoder feedback control operation
Parameters referred to
Pr. 1 Maximum frequency => page 5-321
Pr. 3 Base frequency => page 5-690
V/F V/F V/F