Yaskawa 1000 Hz High Frequency - Manual (Page 13)

YASKAWA ELECTRIC EZZ020793 1000 Hz High Frequency Custom Software Supplement 13
5 New and Modified Software Functions
5 New and Modified Software Functions
◆
Carrier Frequency
• The carrier frequency upper limit changed from 15.0 kHz to 7.0 kHz and two new patterns
were added. See Figure 1 .
• The carrier frequency selection parameter (C6-02) has been modified according to
Table 12 .
• Refer to Application Notes on page 15 for more information.
Table 12 Carrier Frequency Selection Parameter (C6-02) Settings
Figure 1
Figure 1 Additional Carrier Frequency Patterns
◆
Torque Compensation
High speed motors typically have very low impedance compared to standard 60/120 Hz
motors. These high speed/low impedance motors saturate easily and may cause hunting and
oscillation when a high V/f pattern is applied, especially at high frequencies. Therefore,
Torque Compensation Gain (C4-01) is modified to limit voltage boost above 120 Hz and
eliminate voltage boost above 160 Hz as shown in Figure 2 .
C6-02
Carrier
Frequency
Selection
C6-03
Carrier
Frequency
Upper Limit
C6-04
Carrier
Frequency
Lower Limit
C6-05
Carrier Frequency
Proportional Gain
Note
2 5.0 5.0 0 Same as standard
B 7.0 1.0 12 New setting
C 7.0 1.0 8 New setting
F 2.0 2.0 0 Same as standard
7.0 kHz
42 Hz
Carrier
Frequency
Output
Frequency 292 Hz
Parameter C6-02 = B
1.0 kHz
E1-04
7.0 kHz
62 Hz
Carrier
Frequency
Output
Frequency 437 Hz
Parameter C6-02 = C
1.0 kHz
E1-04