VD300 Series Inverter User Manual
Parameter Description
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6.4 P03 Motor 1 Vector Control Parameters Group
P03.00
Speed and Torque
Control Selection
0: Speed control
1: Torque control
0
◎
Vector 0: 10.0
P03.01
Speed Loop Proportional
Gain 1
0~200.0
Vector 1: 20.0
○
P03.02
Speed Loop Integral
Time 1
0.000: Integral disabled
0.000s~10.000s
0.200s
○
P03.03
Speed Loop Parameter
Switchover Frequency
Point 1
0.00Hz~P03.06
5.00Hz
○
Vector 0: 10.0
P03.04
Speed Loop Proportional
Gain 2
0~200.0
Vector 1: 20.0
○
P03.05
Speed Loop Integral
Time 2
0.000: Integral disabled
0.000s~10.000s
0.200s
○
P03.06
Speed Loop Parameter
Switchover Frequency
Point 2
P03.03~P00.07
(max output frequency)
10.00Hz
○
Above parameter setup vector control speed loop PI parameter, can set two groups of parameter and
separately used low frequency and high frequency operation. The two groups of parameters can be
smoothly switchover according to switchover frequency 1 and switchover frequency 2, as below
diagram showed.
Gain/intergral
Running frequency
P03.03
PI
parameter 1
PI
parameter 2
P03.06
Fig 6.4-1Schematic Diagram for speed loop parameter switchover
Speed loop proportion gain (P03.01, P03.04):
Please according to load inertia of motor to adjust the parameters, for larger inertia load, please
increase the proportional gain. For the small inertia load, reduce the proportional gain properly. When
the rate of speed loop gain slants big, although the response speed is faster, but may occur motor
speed oscillation and overshoot. On the contrary, if the proportional gain ratio is too small, the control
response becomes slow, so speed adjusting to the stable value is too long. As shown in figure 6 -11.
Speed loop integral time (P03.02, P03.05):
Same as the proportional gain, the speed loop integral time is short, fast control response, but if it is
too small may lead to oscillation and instability. When the integration time is large, the control
response is slow, speed deviation elimination is getting longer. All requirements will be appropriately
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