•
Using V/f Control Mode
Vector control mode is preset at the factory.
Control mode selection (n002): 0: V/f control mode (initial setting)
1: Vector control mode
Adjusting torque according to application
Adjust motor torque by using “V/f pattern” and “full-range automatic torque boost”.
• V/f pattern setting
Set V/f pattern by n011 to n017 as described below. Set each pattern when using a special motor (high-speed motor, etc.) or when requiring special torque adjustment of machine.
Be sure to satisfy the following conditions for the setting of n011 to n017.
n016 < n014 < n013 < n011
If n016 = n014 is set, the set value of n015 is disabled.
n016 n014 n013 n011 (frequency)
Parameters
No.
n011
Name
Max. output frequency n012 n013 n014
Max. voltage
Max. voltage output frequency
(base frequency)
Mid. output frequency n015 n016 n017
Mid. output frequency voltage
Min. output frequency
Min. output frequency voltage
Unit
0.1Hz
1V
0.1Hz
0.1Hz
1V
0.1Hz
1V
* 10.0V for 200V class 7.5/10hp (5.5/7.5kW)
20.0V for 400V class 7.5/10hp (5.5/7.5kW)
NOTE: Values with parentheses indicate 400V class.
Setting range
50.0 to 400.0Hz
1 to 255.0V
(0.1 to 510.0V)
0.2 to 400.0Hz
0.1 to 399.9Hz
0.1 to 255.0V
(0.1 to 510.0V)
0.1 to 10.0Hz
1 to 50.0V
(0.1 to 100.0V)
Initial Setting
60.0Hz
230.0V
(460.0V)
60.0Hz
1.5Hz
12.0V
(24.0V)
1.5Hz
4.3V *
(8.6V)
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• Typical setting of V/f pattern
Set the V/f pattern according to the application as described below. For 400V class, the voltage values (n012, n015, and n017) should be doubled. When running at a frequency exceeding 50Hz/60Hz, change the maximum output frequency (n011).
Note: Be sure to set the maximum output frequency according to the motor characteristics
(Factory setting)
Increasing voltage of V/f pattern increases motor torque, but excessive increase may cause motor over excitation, motor overheat, or vibration.
Note: n012 is to be set to motor rated voltage.
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• Full-range automatic torque boost (when V/f mode is selected. n002=0)
Motor torque requirement changes according to load conditions. Full range automatic torque boost adjusts voltage of V/f pattern according to the requirement.
The VS-606V7 automatically adjusts the voltage during parameter-speed operation as well as during acceleration.
The required torque is calculated by the inverter.
This ensures tripless operation and energy-saving effects.
Output voltage ∝ Torque compensation gain (n103)
×
Required torque
• Operation
Normally, no adjustment is necessary for torque compensation gain (n103 factory setting: 1.0). An excessively high setting of torque compensation gain will result in motor over excitation, and possible inverter faults. If adjustments are necessary, adjust n103 in increments/decrements of 0.1 for optimization. When wiring distance between the inverter and the motor are long it may be necessary to increase the setting of n103.
When motor generates vibration, decrease the setting of n103.
Adjustment of torque compensation time parameter (n104) and torque iron loss compensation parameter (n105) are normally not required.
Adjust torque compensation parameter under the following conditions:
• Increase setting when the motor generates vibration.
• Reduce setting when motor response is low.
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