Name: YASKAWA T1000A
Brand: YASKAWA
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5.9 n: Special Adjustments

YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual 243

Parameter Details

n n8-84: Polarity Judge Current

Sets the current to determine polarity for the initial polarity calculation as a percentage of the motor rated current (E5-

03).

Note: This parameter is available when in AOLV/PM or CLV/PM control mode.

The drive determines motor polarity at motor start when using AOLV/PM (A1-02 = 6), and at power up when using CLV/PM

(A1-02 = 7).

The integrated current deviation during judging polarity (U6-57) has been provided to check if the initial polarity estimation is

correct or not.

To prevent error when determining motor polarity, make sure that the value displayed in monitor U6-57 is greater than 819. If the

value in U6-57 is less than 819, then increase the current used to determine motor polarity using parameter n8-84.

u n9: Hardware Settings

Using these parameters, the drive output voltage can be adjusted.

n9-10: AVR Time Constant

Sets the delay time constant that is used to adjust the output voltage when the DC bus voltage changes.

n9-12: On-Delay Compensation Time

Sets the time value used for IGBT On-delay compensation.

n9-62: On-Delay Compensation Derating Start Frequency

Sets the frequency at which the drive begins to compensate the output voltage for the IGBT On-Delay.

n9-63: On-Delay Compensation Disable Frequency

When operating a high-speed motor at low speeds, n9-62 sets the frequency at which the drive stops compensating the

switching delay in the DC bus.