Mitsubishi Electronics FR-S500 Automatic torque boost selection Pr, Operating conditions, Setting

Auxiliary parameters

2.11.2 Automatic torque boost selection (Pr. 98 )

You can choose automatic torque boost control.

Automatic torque boost control

Not only gives the motor the optimum excitation but also provides high torque even in a low speed range.

Parameter	Name	Factory	Setting	Remarks
		Setting	Range
98	Automatic torque boost	- - -	0.1 to 3.7kW,	Setting is enabled when
	selection (motor capacity)		- - -	Pr. 30 = "1"

<Operating conditions>

•The number of motor poles should be any of 2, 4 and 6 poles.

•Single-motor operation (One motor for one inverter)

•The wiring length from inverter to motor should be within 30m (98.42feet).

<Setting>

Parameter	Setting	Description
98	- - -	Ordinary V/F control and torque boost (Pr. 0, Pr. 46) are valid.
	0.1 to 3.7kW	Automatic torque boost control valid
		(Set the applied motor capacity or one rank lower motor capacity.)

•Also when the Pr. 98 setting is other than "- - -", Pr. 3 "base frequency" and Pr. 19 "base frequency voltage" are valid.

•When "- - -" or "888" is set in Pr. 19, the rated output voltage is selected.

CAUTION

During operation using automatic torque boost, write to Pr. 3 and Pr. 19 is disabled even if "2" is set in Pr. 77.

♦Related parameters♦

•Torque boost ⇒ Pr. 0 "torque boost", Pr. 46 "second torque boost" (refer to page 63)

•Base frequency ⇒ Pr. 3 "base frequency", Pr. 19 "base frequency voltage" (refer to page 65)

•Applied motor setting ⇒ Pr. 71 "applied motor" (refer to page 69)

• Motor primary resistance ⇒ Pr. 99 "motor primary resistance" (refer to page 122) 2

FUNCTIONS

121