Mitsubishi Electric FR-S500 Series, Инструкция по эксплуатации

Страница: 81 / 222

71
Explanation of functions (parameters)
2
F
UNCT
IO
NS
2.3 Explanation of functions (parameters)
2.3.1 Torque boost (Pr. 0 , Pr. 46 )
<Setting>
•
Assuming that the base frequency voltage is 100%, set the 0Hz voltage in %.
Use the RT signal to switch between two different torque boosts. (Turn on the RT
signal to make Pr. 46 valid(*).)
When using an inverter-dedicated motor (constant-torque motor), make setting as
indicated below.
(If the factory set Pr. 71 value is changed to the setting for use with a constant-torque
motor, the Pr. 0 setting changes to the corresponding value in the following table.)
Increase the setting value when the
distance between the inverter and
motor is long or when the motor torque
in the low speed range is insufficient
(when stall prevention is activated), etc.
Motor torque in the low-frequency
range can be adjusted to the load to
increase the starting motor torque.
Parameter Name Factory Setting Setting Range Remarks
0 Torque boost 6%/5%/4% 0 to 15%
The factory setting varies
according to the inverter capacity.
(Refer to the following table for
details.)
46
Second
torque boost
- - -
0 to 15%,
- - -
- - -: Function invalid. Setting is
enabled when Pr. 30 = "1".
REMARKS
* The RT signal acts as the second function selection signal and makes the other second functions valid.
Inverter Type Inverter Capacity Factory Setting Constant-torque Motor Setting
FR-S520E
FR-S520SE
FR-S510WE 0.1K to 0.75K
6%
6% (no change)
1.5K to 3.7K 4%
FR-S540E
0.4K, 0.75K 6% 6% (no change)
1.5K
5%
4%
2.2K
3%
3.7K 4%
CAUTION
•
Selecting automatic torque boost control makes this parameter setting invalid.
•
A too large setting may cause the motor to overheat or result in an
overcurrent trip. The guideline is about 10% at the greatest.
♦ Related parameters ♦
•
RT signal (second function "Pr. 46") setting
⇒
Pr. 60 to Pr. 63 "input terminal function selection"
(refer to page 108)
•
Constant-torque motor setting
⇒
Pr. 71 "applied motor" (refer to page 78)
•
Automatic torque boost control selection
⇒
Pr. 98 "automatic torque boost selection (motor
capacity)" (refer to page 132)
Pr.0
Pr.46
Setting range
0 Output frequency (Hz)
O
ut
put
vo
ltage