Hitachi J300U Series Operation conditions, When V/f control is selected Function mode, Aux

A-21

No. Operation conditions

1Trial running of motor only

2Light load, low inertia load

3Acceleration and deceleration of light load or low inertia load

Phenomena

The motor runs unsmoothly,

and the revolution fails to increase. The motor current pulsates.

➤

Revolution

➤ t

➤ ➤ 0.1 sec. ➤ ➤ 0.1 sec.

➤

Revolution

➤ t

The motor revolution fails to increase smoothly

Improvements	NOTE: The setting methods shown below	Display, etc.
	apply to DOP and DRW operations.

1.When V/f control or sensor-less vector control is selected

	Function mode						12.3 Function mode
	F-36
	CARRIER 16.0 kHz ➝ 8.0 kHz						F-36 (P.12-14)
					Decrease the initial value.
2. When V/f control is selected
	Function mode				12.3 Function mode
	F-04
							F-04 (P.12-5)
	CONTROL VC
	F-05						12.3 Function mode
	AUX R1 00.223 ➝ 00.323
							F-05 (P.12-5)
					Increase the initial value.
3. When sensor-less vector control is selected
	Function mode
	F-04						NOTE: Select AUT if
	CONTROL SLV						the automatic
	F-05						tuning data is
							used.)
	AUX DATA NOR
	a. AUX	J	001.22	kgm2 ➝ 000.22 kgm2			Use the second func-
					Decrease
						the initial value.
	b. AUX	Kp	002.00 ➝ 003.00				tion for switching
							operation of two
							motors.
					Increase the initial value.

Use a and b solely or combine any of a and b to adjust the motor constant.

Appendix 5 Multi-Motor Operation and Precautions for Operation