Rm-materials-handling VARIABLE SPEED CONTROLS ControlMaster NXT Service Manuale Utente Scaricare il pdf (Pagina 25)

R&M Materials Handling, Inc.

4501 Gateway Boulevard

Springfield, Ohio 45502

P.: (937) 328-5100

FAX: (937) 325

5319

25/53

R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.

5.2.4 S6 U/f curve settings in traveling movement application

The effect of stator resistance at low frequencies is compensated for by increasing the U/f-ratio. The U/f curve

settings for the different motors are shown in the following table.

Note:

• Zero Freq Volt[%] = output voltage at 0 Hz given as a percentage of the voltage at the motor’s nominal frequency.

• U/f Mid Volt[%] = output voltage at U/f-curve’s intermediate point, fixed to 10 % of motor nominal frequency, given as a

percentage of the voltage at the motor’s nominal frequency.

Switch S6 U/f curve settings

-1 -2 -3 Zero Freq Volt

[%] U/f Mid Volt [%] Motor Type

0 1 0 6 12 MF06LA100

1 0 1 6.5 12 MF06LA100(*)

0 0 0 8 12 MF06LA200

1 1 0 8.5 12 MF06LA200(*)

0 1 1 9 16 MF06MA100

0 0 1 10 14

MF06MA200, MF06MK200

(100/120Hz)

1 0 0 21 24 MF06MK200 (35Hz)

1 1 1 Used in a chain hoist lifting application. See section “Parameters for chain hoist lifting”.

(*) Denotes a boost function that provides extra torque for specific motors driven at low frequencies. The function

can be used when motors cannot otherwise move at low speeds. When the curve number 3 or 6 is selected, the

current limit shall be increased to 150% which is set at factory as standard.

Note: Authorized service personnel are allowed to change the curve number 1 to the curve number 3, and the curve number 4

to the curve number 6.

Note: Before activating the torque boost function, drive a few times on the runway at high speed to flatten the runway. If this

does not help, the boost function can be activated.

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Rm-materials-handling VARIABLE SPEED CONTROLS ControlMaster NXT Service Manuale Utente Pagina 25