“A” Group: Standard Functions
Voltage Gain – Using parameter A_45 you can modify the voltage gain of the inverter (see graph at right). This is specified as a percentage of the full scale setting (Automatic Voltage Regulation) AVR level in parameter F_03. The
V 100%
Voltage Gain
A 45
gain can be set from 50% to 100%. It should be adjusted in accordance with the motor specifi- cations.
The following table shows the methods of torque control selection.
50% 
0
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| “A” Function | Run |
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| Code | SRW Display | (CE) | (UL) | (Jpn) | ||||
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| A_41 | Torque boost method | Two options: | ✘ | 00 | 00 | 00 | — | |
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| 00 ...Manual torque boost |
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| 01 ...Automatic torque boost |
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| A_42 | Manual torque boost | Can boost starting torque | ✔ | 11 | 11 | 11 | — | |
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Configuring ParametersDrive |
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| normal V/f curve, from 0 to |
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| code 11 |
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| 1/2 base frequency |
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| A_43 | Manual torque boost | Sets the frequency of the V/f | ✔ | 10.0 | 10.0 | 10.0 | % | |
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| frequency adjustment | breakpoint A in graph (top of |
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| previous page) for torque boost |
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| F 10.0% |
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| A_44 | V/f characteristic curve | Two available V/f curves; | ✘ | 00 | 00 | 00 | — | |
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| 00 ...Constant torque |
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| CONTROL | SLV |
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| 01 ...Reduced torque |
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| A_45 | V/f gain setting | Sets voltage gain of the | ✔ | 100 | 100 | 100 | % | |
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| inverter from 50 to 100% |
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| 100% |
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