Mitsubishi Electric FR-A700 EC, Инструкция по эксплуатации

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Adjust the output torque of the motor (current) Parameter
6 - 154
6.7.3 Slip compensation (Pr. 245 to Pr. 247)
The inverter output current may be used to assume motor slip to keep the motor speed constant.
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.
Pr.
No.
Name
Initial
Value
Setting Range Description Parameters referred to
Refer to
Section
245
Rated slip 9999
0.01–50% Used to set the rated motor slip.
1
3
Maximum
Frequency
Base frequency 6.8.1
6.9.1
0/9999 No slip compensation
246
Slip compensation time
constant
0.5s 0.01–10s
Used to set the slip compensation
response time. When the value is
made smaller, response will be
faster. However, as load inertia is
greater, a regenerative over volt-
age (E.OV
첸
) error is more liable
to occur.
247
Constant-output region slip
compensation selection
9999
0
Slip compensation is not made in
the constant output range (fre-
quency range above the frequency
set in Pr. 3)
9999
Slip compensation is made in the
constant output range.
NOTE
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.
Rated slip
Synchronous speed at base frequency Rated speed
–
Synchronous speed at base frequency
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100%
×
=