Toshiba VF-FS1 instruction manual Setting motor constants 2 Details

E6581381

H: Using this parameter along with H, adjust the speed of response to the frequency command.

H: Using this parameter along with H, adjust the speed of response to the frequency command.

*How to make adjustments according to the moment of inertia of the load

The moment of inertia of the load (including that of the motor shaft) was set at the factory on the assumption that it would be three times as large as that of the motor shaft.

Adjust H, H with the ratio of inertia in case load inertia is different from three times of the motor inertia.

When making the above adjustments, increase or decrease settings in steps of 10% or so while checking how things change.

Note also that, depending on the settings of H and H, the frequency may exceed the upper-limit frequency if the inverter is set so as to accelerate the load in the shortest possible time.

6.15.2Setting motor constants 2 (Details)

6

H : Exciting current coefficient

H : Stall prevention control coefficient 1

H : Stall prevention control coefficient 2

H : Motor adjustment coefficient

H : Maximam voltage adjustment coefficient

H : Waveform switching adjustment coefficient

* The following parameters enables you to make adjustments more finely.

Title	Function	Adjustment range	Default setting
H	Exciting current coefficient	100-130 (%)	100
H	Stall prevention control	10-250	100
	coefficient 1
H	Stall prevention control	50-150	100
	coefficient 2
H	Motor adjustment coefficient	0-200	Depends on
			the capacity
H	Maximam voltage adjustment	90-120 (%)	104
	coefficient
H	Waveform switching	0.1-14.0(kHz)	14.0
	adjustment coefficient

H: Used to fine adjust the magnetic field increase rate in low-speed range. To increase the torque in low-speed range, specify a larger value for H. Note that this parameter should be adjusted only when enough torque cannot be obtained, even though auto-tuning (H=) was made after the setting of the parameters H through H. Note also that adjusting this parameter may cause an increase in the no-load current in low-speed range. If the no-load current exceeds the rated current, do not adjust this parameter.

H: Using this parameter along with H adjusts characteristics in a region in which the frequency is above the base frequency (region where the field is weak).

F-48