E6581381
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).
*How to make adjustments in a region (region where magnetic field is weak) above the base frequency
If a heavy load is applied instantaneously (or transiently), the motor may stall before the load current reaches the current set with the stall prevention level 1 parameter (H). In many cases, this kind of stall can be avoided by gradually reducing the setting of H.
A drop in supply voltage may cause fluctuations of the load current or vibration of the motor. In some cases, such phenomena can be eliminated by changing the setting of H to between 80 and 90. However, this may cause an increase in load current, so that it is also necessary to
adjust the setting of the electronic thermal protective level 1 parameter (VJT) properly according to the motor capacity.
H: There is no need to adjust this parameter under normal conditions. (Do not change the setting, unless otherwise instructed by Toshiba technical staff)
H: Specify a larger value for H to secure as high an output voltage as possible in a region (region where magnetic field is weak) above the base frequency. Setting H to a larger value may cause the motor to vibrate or gears to squeak. If such a phenomenon occurs, do not adjust this parameter.
H: Specify a larger value for H if switching from a waveform to another results in a considerable increase in vibration and noise in
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