參數(shù)資料
型號(hào)： AN-1090
廠商： International Rectifier
英文描述： Controller Dynamics and Tuning
中文描述： 控制器動(dòng)力學(xué)和調(diào)整
文件頁(yè)數(shù)： 8/15頁(yè)
文件大?。?/td> 269K
代理商： AN-1090
15
www.irf.com
8
Adjust KpSreg until the desired transient response (Speed regulator bandwidth) is
obtained. For this fan application with high inertia to friction ratio, Kp3 is selected to yield
approximately 0.2 sec first order time constant.
2)
Tuning of KxSreg
. After the desired proportional gain (KpSreg) is selected (step 1),
please resume nominal ramp rate and speed regulator integral gain (KxSreg). Under
such circumstance (with KpSreg = Kp3 and KxSreg = Kx1), issue a ramp speed
command under the same speed range (30 to 35%) as illustrated in step 1. Figure 10
shows ramp speed responses under 3 different integral gains (Kx1, Kx2 and Kx3). The
response with the original (imported from Parameter Configurator) integral gain (Kx1)
exhibits oscillatory behavior. The integral gain is being reduced (Kx2 and Kx3) just
enough to remove speed oscillation. For this fan application, the response obtained is
acceptable with KxSreg = Kx3.
Ramp Speed Response
2400
2600
2800
3000
3200
3400
3600
1
100 199 298 397 496 595 694 793 892 991
Time (0.275 sec/Div)
S
Kx1
Kx2
Kx3
Reduce
KxSreg
Figure 10. Ramp Speed Response under Different KxSreg Gains
3) Figure 11
shows ramp speed response with non-optimized (KpSreg = Kp1, KxSreg =
Kx1) and optimized (KpSreg = Kp3, KxSreg = Kx3) speed regulator gains. A tighter
control response is exemplified with the gain optimization.
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