Slip Compensation - Mitsubishi Electric FR-A820-00046 Instruction Manual

Parameters
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.
Pr.
245
G203
246
G204
247
G205
● 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".
Rated slip
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
Pr. 3
FR-A800
V/F V/F V/F
Name
Rated slip
Slip compensation time
constant
Constant-power range slip
compensation selection
Synchronized speed at the time of base frequency - rated rotation speed
=
Synchronized speed at the time of base frequency
Maximum frequency
Base frequency
Initial Setting
Description
value range
0.01 to 50% Set the rated motor slip.
9999
0, 9999 Without slip compensation
Set the response time of the slip compensation.
Response will become faster when the value is
0.5s 0.01 to 10s lowered, but the regenerative overvoltage (E.OV[])
error will occur more frequently when the load inertia
is larger.
Do not perform slip compensation at constant output
0 range (frequency range higher than the frequency set
in Pr. 3).
9999
Perform the slip compensation of the constant
9999
output range.
(G) Control parameters
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