Mitsumi electronic 55K Stall prevention Pr , Pr , Pr , Pr , Pr , Pr, To 120Hz 148, 149, 154

Related parameters

Pr. 9 "electronic thermal O/L relay" Pr. 48 "second stall prevention

operation current"

Pr. 49 "second stall prevention operation frequency"

Pr. 73 "0-5V/0-10V selection"

Pr. 156 "stall prevention operation selection"

PARAMETERS

4.2.12 Stall prevention (Pr. 22, Pr. 23, Pr. 66, Pr. 148, Pr. 149, Pr. 154)

Pr. 22 "stall prevention operation level" Pr. 23 "stall prevention operation level

compensation factor at double speed" Pr. 66 "stall prevention operation level reduction

starting frequency"

Pr. 148 "stall prevention operation level at 0V input" Pr. 149 "stall prevention operation level at 10V input"

Pr. 154 "voltage reduction selection during stall prevention operation"

#Set the output current level at which the output frequency is adjusted so that the inverter will not come to an alarm stop due to overcurrent etc.

#For high-speed operation at or over the more base frequency, acceleration may not be made because the motor current does not increase. To improve the operation characteristics of the motor in such a case, the stall prevention level in the high-frequency range can be reduced. This is effective for operation of a centrifugal separator up to the high-speed range. Normally, set 60Hz 〈 50Hz〉 in Pr. 66 and 100% in Pr. 23.

#In order to provide torque during stall prevention, Pr. 154 is factory-set not to reduce the output voltage. The setting of reducing the output voltage further decreases the probability of overcurrent trip occurrence.

#The stall prevention operation level can be varied by entering the analog signal into terminal 1.

Parameter Number	Factory Setting	Setting Range	Remarks
22	120%	0 to 150%, 9999	9999: Analog variable
23	9999	0 to 200%, 9999	9999: Constant according to Pr. 22
66	60Hz 〈 50Hz〉	0 to 120Hz
148	120%	0 to 150%	(Bias)
149	150%	0 to 150%	(Gain)
154	1	0, 1	0: Output voltage reduced
			1: Output voltage not reduced

Pr.22	Pr.23 = 9999
preventionStall operationlevel (%)
		compensation factor (%)
		Pr.23
		Reduction ratio

		Pr.66	120Hz Output
			frequency (Hz)
Stall prevention	operation level (%)	(150%)
		(120%)
			Pr.149
		Pr.148
		0%	10(5)V
		0V

Input voltage (V)

(across frequency setting terminals 1-5)

Setting example			(Pr.22=120%, Pr.23=100%, Pr.66=60Hz)
		120				4
preventionStall	leveloperation(%)	112.5
		90
		75
		0	60	80	100	120
					Output
					frequency (Hz)

77