Functional Descriptions (By Parameter No.)

Vector control is effective when a high torque is required during a large starting torque or during low speed or when the load fluctuation is erratic.

This control is not suitable for loads that cause fine rotation inconsistencies during low speed operation.

Data setting value	Details
0	V/F control
1	Vector control

Notes)

1. Observe the following conditions when using the vector control mode.

• The motor must be a general-purpose squirrel cage induction motor.
• The motor capacity must be the "same" of "one frame lower" than the inverter capacity, and must be 0.2kW or more.
• The No. of motor poles is 2, 4 or 6 poles.
• The motor must be a single operation motor (one motor operated by one inverter).
• The maximum wiring length between the inverter and motor must be 20m or less.
• Favourable run characteristics may not be achieved under conditions other than those above.

2. When using the vector control mode, the carrier frequency may change automatically in areas where the output frequency is low.

(Setting procedures when vector control is selected)

1. Selection of control method :

Select vector control. (Set parameter No. 65 to "1".)

2. Setting of motor capacity :

Set the capacity of the motor being used in parameter No. 66 (0.2 to 3.7 kW)

The factory setting is motor capacity = inverter capacity

• If the motor and inverter capacities are the same, the setting does not need to be changed.

Set the No. of motor poles being used in parameter No. 67 (2, 4 or 6 poles)

The factory setting is No. of motor poles = 4 poles.

• If the No. of motor poles is 4 poles, the setting does not need to be changed.

• If the required motor characteristics are achieved, the settings are complete.
• (Operate with the recommended motor constants.)
• If the required motor characteristics are not achieved, perform the following settings.

• When the motor constants are known, set the following.
• Parameter No. 69 - Voltage compensation constant
• Parameter No. 70 - Slip compensation frequency
• If the motor constants are not known, perform automatic tuning.
• Set parameter No 68. to 1, and measure the voltage compensation constant.
• Set parameter No. 68 to 2, and measure the slip compensation frequency.

• If the required motor characteristics are achieved, the settings are complete.
• If the required motor characteristics are not achieved even when the motor constants are set in parameter Nos. 69 and 70, perform automatic tuning.

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