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22
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YORK, A Johnson Controls Company
2304
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Sets the derivation time for acceleration compensation.
• Adding a derivative of the reference to the output of the speed controller compensates for inertia during
acceleration.
• 2303 DERIVATION TIME describes the principle of derivative action.
• Rule of thumb: Set this parameter between 50 and 100% of the sum of the mechanical time constants for the
motor and the driven machine.
• The figure shows the speed responses when a high inertia load is accelerated along a ramp.
2305
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Starts automatic tuning of the speed controller.
0 =
OFF
– Disables the Autotune creation process. (Does not disable the operation of Autotune settings.)
1 =
ON
– Activates speed controller autotuning. Automatically reverts to
OFF
.
Procedure:
Note! The motor load must be connected.
• Run the motor at a constant speed of 20 to 40% of the rated speed.
• Change the autotuning parameter 2305 to
ON
.
The drive:
• Accelerates the motor.
• Calculates values for proportional gain and integration time.
• Changes parameters 2301 and 2302 to these values.
• Resets 2305 to
OFF
.
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23 =,2
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4,
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2==,2 2@ ,2
t
%
Speed reference
Actual speed
t
%
==,2 2@ ,2
Содержание York AYK550
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