5-45
In vector control, current feedback control is performed. In the current feedback control, the current is controlled
with the difference between the motor induced voltage and the inverter output voltage. For a proper control, the
inverter output voltage should be sufficiently higher than the motor induced voltage. Generally, the voltage
difference is about 20 V for 230 V series, about 40 V for 460 V series.
The voltage the inverter can output is at the same level as the inverter input voltage. Configure these voltages
correctly in accordance with the motor specifications.
When enabling the vector control without speed sensor using a general-purpose motor, set the F05 (Rated Voltage
at Base Frequency 1) data at the rated voltage of the motor. The voltage difference described above is specified by
function code P56 (Induced voltage factor under vector control). Generally, there is no need to modify the initial
setting.
Non-linear V/f Patterns 1, 2 and 3 for Frequency (H50, H52 and H65)
Data setting range: 0.0 (cancel); 0.1 to 500.0 (Hz)
Set the frequency component at an arbitrary point in the non-linear V/f pattern.
Setting "0.0" to H50, H52 or H65 disables the non-linear V/f pattern operation.
Non-linear V/f Patterns 1, 2 and 3 for Voltage (H51, H53 and H66)
Data setting range: 0 to 240 (V): Output an AVR-controlled voltage for 230 V series
0 to 500 (V): Output an AVR-controlled voltage for 460 V series
Sets the voltage component at an arbitrary point in the non-linear V/f pattern.
Maximum Output Voltage 1 (F06)
Data setting range: 80 to 240 (V): Output an AVR-controlled voltage for 230 V series
160 to 500 (V): Output an AVR-controlled voltage for 460 V series
Set the voltage for the maximum frequency 1 (F03).
If F05 (Rated Voltage at Base Frequency 1) is set to "0," settings of H50 through H53, H65, H66 and F06 do not
take effect. (When the non-linear point is below the base frequency, the linear V/f pattern applies; when it is above,
the output voltage is kept constant.)
F07, F08
Acceleration Time 1, Deceleration Time 1
E10, E12, E14 (Acceleration Time 2, 3 and 4)
E11, E13, E15 (Deceleration Time 2, 3 and 4)
H07
(Acceleration/Deceleration
Pattern)
H56 (Deceleration Time for Forced Stop)
H54, H55 (Acceleration Time/Deceleration Time, Jogging)
H57 to H60 (1st and 2nd S-curve Acceleration/Deceleration Range)
F07 specifies the acceleration time, the length of time the frequency increases from 0 Hz to the maximum frequency. F08
specifies the deceleration time, the length of time the frequency decreases from the maximum frequency down to 0 Hz.
- Data setting range: 0.00 to 6000 (s)
Under V/f control
Summary of Contents for FRENIC-MEGA
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