
E6581381
6.12.5 Output voltage adjustment/Supply voltage correction
XNX : Base frequency voltage 1
H : Supply voltage correction (output voltage adjustment)
•Function
Base frequency voltage1
The H parameter adjusts the voltage corresponding to the base frequency 1 XN so that no voltage exceeding the XNX set value is put out. (This function is enabled only when H is set to either "0" or "1".)
Supply voltage correction
The H parameter maintains a constant V/F ratio, even when the input voltage decreases. The torque during
Supply voltage correction: Maintains a constant V/F ratio, even when the input voltage fluctuates.
Limitation of output voltage: Limits the voltage at frequencies exceeding the base frequency. Applied when operating a special motor with low induced voltage.
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Title | Function | Adjustment range | Default setting |
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| Base frequency voltage1 | 230 (WP/WN type) |
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XNX | 400 (WP type) |
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| 460 (WN type) |
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| 0: Supply voltage uncorrected, |
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| output voltage limited |
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| 1: Supply voltage corrected, |
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H | Supply voltage correction | output voltage limited | 2 |
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| (limitation of output voltage) | 2: Supply voltage uncorrected, |
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| output voltage unlimited |
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| 3: Supply voltage corrected, |
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| output voltage unlimited |
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+If H is set to "" or "", the output voltage will change in proportion to the input voltage.
+Even if the base frequency voltage (XNX parameter ) is set above the input voltage, the output voltage will not exceed the input voltage.
+The rate of voltage to frequency can be adjusted according to the rated motor capacity. For example, setting H to "" or "" prevents the output voltage from increasing, even if the input voltage changes when operation frequency exceeds the base frequency.
+When the V/F control mode selection parameter (RV) is set to any number between and , the supply voltage is corrected regardless of the setting of H.