Senlan Hope800 Series Manual page 79

F3-06 performs the differential operation on the reference frequency which has been accel/decel treated
to obtain a feedforward torque reference, which in turn is added to the reference torque, thus helping the
operating frequency better track the reference frequency during accel/decel and reduce the overshoot.
ASR regulation principle: first increase the proportional gain as much as possible (but should not cause
system oscillation), then adjust the integral time so that the system has a quick sponse and a slight
overshoot.
If improper parameter settings lead to an excessive speed overhoot, overvoltage may occur due to
regenerative energy generated during speed restoring (a deceleration process).
F3-11
Setting
0.00~50.00Hz
range
F3-12
Setting
0.0~100.0％(motor rated torque=100％)
range
When multiple motors drive the same mechanical load and each motor is controlled by an inverter, each
motor and inverter will bear different load because of the disparity in rated speed or mechanical
characteristics among different motors. The droop function can balance the load among motors by
regulating the hardness or softness of motors' mechanical characteristics.
F3-11 set the changing value of the operating frequency when the motor torque equals F3-12 plus rated
torque.
If motor torque is greater than F3-12,
Frequency after droop=initial reference frequency-(current torque-F3-12) ×droop level
The droop mechanical characteristic is shown as the following diagram.
F3-13
Setting
0: Conditionally active(selected by digital input 45)
range
F3-14
0: F3-15
3: PFI×2.5
Setting
6: Arithmetic unit 2×2.5
range
Note: In all cases above, motor rated torque is equivalent to 100%.
Motor rated torque=motor rated capacity÷(2π×motor rated speed÷60)
F3-15
Droop level
Droop starting torque
Torque control select
Torque reference select
1: AI1×2.5
4: UP/DOWN value×2.5
7: Arithmetic unit 3×2.5
Digital torque reference
Default
Default
Operating frequency
Rated torque
Droop starting
torque
Default
Default
Default
6 Parameter Description
0.00Hz
0.0％
Droop level
Torque
0 Change
1: Always active
0 Change
2: AI2×2.5
5: Arithmetic unit 1×2.5
8: Arithmetic unit 4×2.5
Change
0.0％
○
Change
○
Change
×
×
○
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