EQ7 Series Instruction Manual - TECO-Westinghouse Motor Company
EQ7 Series Instruction Manual - TECO-Westinghouse Motor Company
EQ7 Series Instruction Manual - TECO-Westinghouse Motor Company
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8.4 Load Selection / Auto Torque Boost / Auto Energy Saving Operation (F27, Default 1)<br />
This parameter sets the load type and auto torque boost setting, including auto energy savings.<br />
F37 Load Selection / Auto Torque Boost / Auto Energy Saving Operation 1<br />
F37 specifies V/f pattern, torque boost type, and auto energy saving operation in accordance with the characteristics<br />
of the load.<br />
Specify the torque boost level with F09 in order to assure sufficient starting torque.<br />
To set parameter F37:<br />
- Press PRG key, next select QUICK SET or DATA SET with UP/DOWN and keys and press the<br />
FUNC/DATA key.<br />
- In the parameter list move cursor to F37 with UP/DOWN keys and press FUNC/DATA key to select.<br />
Data for<br />
F37<br />
0<br />
V/f pattern<br />
Variable torque<br />
V/f pattern<br />
Torque boost<br />
Torque boost<br />
specified by F09<br />
1<br />
2<br />
Linear<br />
V/f pattern Auto torque boost<br />
3<br />
Variable torque<br />
V/f pattern<br />
Torque boost<br />
specified by F09<br />
4<br />
5<br />
Linear<br />
V/f pattern Auto torque boost<br />
Auto energy<br />
saving<br />
Disable<br />
Enable<br />
Applicable load<br />
Variable torque load<br />
(General-purpose fans and pumps)<br />
Constant torque load<br />
Constant torque load<br />
(To be selected if a motor may be<br />
over-excited at no load.)<br />
Variable torque load<br />
(General-purpose fans and pumps)<br />
Constant torque load<br />
Constant torque load<br />
(To be selected if a motor may be<br />
over-excited at no load.)<br />
If a required "load torque + acceleration toque" is more than 50% of the constant torque, it is<br />
recommended to select the linear V/f pattern (factory default).<br />
• Under the vector control with speed sensor, F37 is used to specify whether the auto energy saving<br />
operation is enabled or disabled. (V/f pattern and torque boost are disabled.)<br />
Data for F37<br />
Operation<br />
0 to 2 Auto energy saving operation OFF<br />
3 to 5 Auto energy saving operation ON<br />
• Under the vector control without speed sensor, both F37 and F09 are disabled. The auto energy saving<br />
operation is also disabled.<br />
• V/f characteristics<br />
The <strong>EQ7</strong> series of inverters offers a variety of V/f patterns and torque boosts, which include V/f patterns suitable for<br />
variable torque load such as general fans and pumps and for constant torque load (including special pumps requiring<br />
high starting torque). Two types of torque boosts are available: manual and automatic.<br />
(F09)<br />
(F09)<br />
Variable torque V/f pattern (F37 = 0) Linear V/f pattern (F37 = 1)<br />
8-4