Slip Compensation (Pr. 245 To Pr. 247) - Mitsubishi Electric F700 Instruction Manual

3.2.3

Slip compensation (Pr. 245 to Pr. 247)

The inverter output current may be used to assume motor slip to keep the motor speed constant.
Parameter
Name
Number
245 Rated slip
Slip compensation time
246
constant
Constant-output region slip
247
compensation selection
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 140)
⋅ Slip compensation is validated when the motor rated slip calculated by the following formula is set to Pr. 245. Slip
compensation is not made when Pr. 245 = "0" or "9999".
Rated slip =
REMARKS
When performing slip compensation, the output frequency may become greater than the set frequency. Set the Pr. 1 Maximum
frequency value a little higher than the set frequency.
♦ Parameters referred to ♦
Pr. 1 Maximum frequency Refer to page 62
Pr. 3 Base frequency Refer to page 64
Initial Value
9999
0.5s
9999
Synchronous speed at base frequency - rated speed
Synchronous speed at base frequency
Adjust the output torque of the motor (current)
Setting Range
0.01 to 50% Used to set the rated motor slip.
0, 9999 No slip compensation
Used to set the slip compensation
response time. When the value is made
smaller, response will be faster. However,
0.01 to 10s
as load inertia is greater, a regenerative
overvoltage (E.OV ) error is more liable
to occur.
Slip compensation is not made in the
0 constant output range (frequency range
above the frequency set in Pr.3)
Slip compensation is made in the constant
9999
output range.
Description
× 100[%]
55
Pr. 244
page 210
Pr. 250
page 84
3