Sinee EM500 - High Frequency Injection

EM500 Open-Loop Vector Control Inverter User Manual
228
Range
F06.33
Injection Current
at High
Frequency
Range
0.0 - 30.0 (100.0= Motor
Rated Current)
%
8.0
●
F06.34
High Frequency
Range Regulator
Gain of Injection
Current
0.00 - 10.00
0.50
●
F06.35
Integral Time of
High Frequency
Range Regulator
of Injection
Current
0.00 - 300.00
ms
10.00
●
The high frequency current injection method realizes the detection of the initial
position of the rotor. When inverter is in stationary status, inject the high frequency
current to motor stator winding so as to estimate motor rotor position accurately by taking
advantage of saliency effect and magnetic flux saturation characteristics and detecting the
time of the high frequency current peak. According to the experimental result, this
method does not have a high accuracy or depend upon any motor parameter.
0
低频段
高频段
F06.28 F06.32
F06.29
F06.33
Injection
Current
Low Frequency
Range
High Frequency Range
Frequency
Figure 7-23 High Frequency Injection
At the low frequency range (output frequency < F06.28), the injection current is
determined by F06.29; at the high frequency range (output frequency ＞ F06.32), the
injection current is determined through F06.33.