Mitsubishi Electric 800 Series Instruction Manual page 564

5.13.13 Slip compensation
V/F V/F V/F
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. Name
245 Rated slip
G203
246 Slip compensation time
G204 constant
247 Constant-power range slip
G205 compensation selection
• 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 =
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 following cases. At the times of stall preventive (oL, OL) operation, regeneration
avoidance operation, auto tuning
Parameters referred to
page 253
Pr.1 Maximum frequency
page 539
Pr.3 Base frequency
Initial value Setting range
9999 0.01 to 50%
0, 9999
0.5 s 0.01 to 10 s
9999 0
9999
Synchronized speed at the time of base frequency - rated rotation speed
Synchronized speed at the time of base frequency
Description
Set the rated motor slip.
Without slip compensation
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.
Do not perform slip compensation at constant output range
(frequency range higher than the frequency set in Pr.3).
Perform the slip compensation of the constant output range.
× 100 [%]
5.13 (G) Control parameters
3
4
5
5
5
6
7
8
9
10
563
5. PARAMETERS