Ch12 Descriptions of Parameter Settings
| VFD-ED
12-6
Determines the AC motor drive control method.
0: You can set the V/F ratio as required and control multiple motors simultaneously.
1: You can use a PG card with an encoder for closed-loop speed control.
2: Use auto-tuning for optimal settings of the control parameters.
3: To increase torque and the accuracy of the speed control (1:1000).
8: To increase torque and the accuracy of the speed control (1:1000). This setting is for use only with
permanent magnet motors. The other settings are for use with induction motors.
Speed Unit
Control Mode
VF VFPG SVC
FOCPG
FOCPM
Default:
0
Settings 0: Hz
1: m/s
2: ft/s
3: Direct docking mode only, contact Delta for more information.
Output Direction Selection
Control Mode
VF VFPG SVC
FOCPG FOCPM
Default:
0
Settings
0: FWD: counterclockwise, REV: clockwise
1: FWD: clockwise, REV: counterclockwise
Carrier Frequency
Control Mode
VF VFPG SVC
FOCPG FOCPM
Default:12
Settings
2–15 kHz
Determines the PWM carrier frequency for the AC motor drive.
Models
3–5 HP
7.5–15 HP
20–30 HP
40–60 HP
75–100 HP
Settings
2–15 kHz
2–15 kHz
2–15 kHz
2–9 kHz
2–6 kHz
Default
8 kHz
10 kHz
8 kHz
6 kHz
6 kHz
From the table, you see that the PWM carrier frequency has significant influences on the motor’s
electromagnetic noise, the AC motor drive heat dissipation, and the motor acoustic noise. Therefore, if
the surrounding noise is greater than the motor noise, lower the carrier frequency to reduce the
temperature rise. Although the motor has quiet operation in the higher carrier frequency, consider the
entire wiring and interference.
If you set the carrier frequency higher than the defaults in the table above, the motor drive derates the
capacity. See Carrier Frequency Derating Capacity (Fc) in Chapter 02.
Содержание VFD-ED Series
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