TB Wood's WFC1000 Series, Инструкции по установке, эксплуатации и обслуживанию

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32
Parameter Units Level
65-SLIP - Slip Compensation
Slip compensation is used to provide a more constant output speed as motor loading changes. This
parameter is used in both the Volts/Hertz and High Torque modes of operation. Too much slip
compensation may result in unstable motor operation. It is not intended for use with a synchronous
motor. In Volts/Hertz mode, the inverter’s output frequency is increased as the motor loading increases. In
HT mode (Vector Control), the setting of 65-SLIP is the nominal full load speed compensation for the motor.
This setting is required for optimum performance at low speeds.
65-SLIP is programmable in 0.01% increments from 0.00 to 10.00%. See the following formula and example
to determine the proper setting of parameter 65-SLIP:
Example: Assume the use of a 1740 RPM motor with a nameplate current (Im) rating of 9.6 amperes. From
Section 1.5 or parameter 03-IRAT, we determine that the drive is rated at 15.2 amperes. From Section 1.6,
we can determine that the synchronous (unloaded) speed of the motor to be 1800 RPM. Using the formula,
we find:
65-SLIP = RPMs - RPM1 x IRAT x 100(%) = 1800 - 1740 x 15.2 x 100% = 5.27%
___________ ____ __________ ____
RPMs Im 1800 9.6
66-STAB - Current Stability Adjustment L2
Lightly loaded motors may tend to oscillate and become unstable due to electro-mechanical relationships in
the motor. This may be more prevalent when the inverter capacity is larger than the motor. This adjustment
will stabilize the motor current in these conditions. The range of adjustment is 0 through 4, with the default
being 2. Some 2-pole (3600 RPM synchronous speed) motors have proven to require alteration of this
parameter to assure stable operation.
67-TOL - Timed Overload Trip Point % L1
67-TOL is the timed overload trip
point. This parameter defines the
load point beyond which a timed
electronic trip can occur. The trip
time depends on the amount of
overload and is 1 minute for 150%
of the setting, longer for lesser
degrees of overload. A 10%
overload will not cause the drive to
trip. Parameter 67-TOL is
adjustable in 1% increments from 5
to 100% of drive capacity. The
factory setting is 0, inactive.
The action of 67-TOL is presented
graphically in the Trip Time chart to
the right. See also parameter 6A-
TOLC for information on setting
timed overload appropriately for
your motor.
The proper setting of parameter 67-
TOL is calculated using the value
stored at 03-IRAT and the motor
nameplate current (Im) according to
the following formula:
67-TOL = Im x 100%
____
IRAT
WARNING
WHEN USING MULTIPLE MOTORS ON A SINGLE INVERTER, USE SEPARATE EXTERNAL
PROTECTION ON EACH MOTOR AND SET 67-TOL TO 0 (DISABLED).
AVERTISSEMENT
AVEC L’UTILISATION DE PLUSIEURS MOTEURS SUR UN SEUL INVERSEUR, UTILISEZ UNE
PROTECTION EXTRENE SÉPARÉE SUR CHAQUE MOTEURS ET PROGRAMMEZ 67-TOL À 0.
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