Mitsubishi Electric 800 Series Instruction Manual (Function page 495

17.11
Slip compensation
V/F V/F V/F
Under V/F control, the slip of the motor is estimated from the inverter output current to maintain the rotation of the motor
constant.
Pr.
245
Rated slip
G203
246 Slip compensation time
G204 constant
247 Constant output range slip
G205 compensation selection
• Calculate the rated motor slip and set the value in Pr.245 to enable slip compensation.
Slip compensation is not performed when Pr.245 = "0 or 9999".
Synchronized speed at the time of base frequency - rated rotation speed
Rated slip =
NOTE
• 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 the following conditions:
Stall prevention (OLC, OLV) operation, regeneration avoidance operation, auto tuning, stop-on-contact control, acceleration/
deceleration, encoder feedback control operation
Parameters referred to
Pr.1 Maximum frequencypage 292
Pr.3 Base frequencypage 470
494
17. (G) Control Parameters
17.11 Slip compensation
Name Initial value
9999
0.5 s
9999
Synchronized speed at the time of base frequency
Setting
range
0.01% to
Set the rated motor slip.
50%
0, 9999 No slip compensation
Set the response time of the slip compensation. Reducing the
0.01 to 10 s value improves the response, but the regenerative overvoltage
(E.OV[]) error is more likely to occur with a larger load inertia.
No slip compensation in the constant power range (frequency
0
range higher than the frequency set in Pr.3).
9999 Slip compensation is performed in the constant power range.
Description
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