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4-22
4-2 Function Mode
4
Functions
Constant Torque Characteristics (VC)
Output voltage is proportional to output frequency.
While proportional from 0 Hz to base frequency, the output voltage is constant from base to
maximum frequencies.
Special Reduced Torque Characteristics (Special VP)
Suitable for a fan or pump that requires torque in a low speed range. These have VC characteristics
only for low deceleration in reduced torque characteristics.
Period a: Provides constant torque characteristics within a range from 0 Hz to 10% of the base
frequency.
(Example) If the base frequency is 60 Hz, the Inverter provides constant torque
characteristics within a range from 0 to 6 Hz.
Period b: Provides reduced torque characteristics within a range from 10% to 100% of the base
frequency.
The Inverter outputs voltage based on a curve of the 1.7th power of the frequency.
Period c: Provides constant voltage characteristics within a range from the base frequency to the
maximum frequency.
Free V/f Setting
• You can set desired V/f characteristics by setting 7 points of voltage and frequency. (b100 to b113)
• The free V/f frequencies should always be 1
≤
2
≤
3
≤
4
≤
5
≤
6
≤
7.
All the default settings are 0 Hz. You must set Free V/f setting 7 first. (Operation is disabled by
factory default.)
0
Output voltage
(100%)
Base frequency
Output
frequency (Hz)
Max. frequency
0
Output
voltage
(100%)
Base
frequency
Output
frequency (Hz)
Max.
frequency
VC
VP(f )
10% of base
frequency
1.7
a
b
c
Summary of Contents for 3G3RX Series
Page 1: ...Cat No I560 E1 03 USER S MANUAL SYSDRIVE RXSERIES High function General purpose Inverter ...
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Page 17: ...Chapter 1 Overview 1 1 Functions 1 1 1 2 Appearance and Names of Parts 1 4 ...
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Page 23: ...Chapter 2 Design 2 1 Installation 2 1 2 2 Wiring 2 6 ...
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Page 337: ...Chapter 6 Inspection and Maintenance 6 1 Inspection and Maintenance 6 1 ...
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Page 437: ...Index ...
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