General Information; About This Manual; Terminology And Definitions; Terms And Definitions Used In The Manual - WEG CFW-11 Programming Manual

2.1 ABOUT THIS MANUAL

This manual presents the necessary information for the configuration of all of the functions and parameters of
the CFW-11 Frequency Inverter. This manual must be used together with the CFW-11 User Manual.
The text intents to supply additional information to facilitate the use and programming of the CFW-11 in
specific applications.

2.2 TERMINOLOGY AND DEFINITIONS

2.2.1 Terms and Definitions Used in the Manual

Normal Duty Cycle (ND): It is the inverter operation regimen that defines the maximum current value for
continuous operation I
(Application)=0 (Normal Duty – ND). It must be used for driving motors that are not subject in that application
to high torques in relation to their rated torque, when operating in permanent regimen, during start, acceleration
or deceleration.
I : Inverter rated current for use with normal overload regimen (ND=Normal Duty).
nom-ND
Overload: 1.1 x I
nom-ND
Heavy Duty Cycle (HD): It is the inverter operation regimen that defines the maximum current value for
continuous operation I
(Application)=1 (Heavy Duty (HD)). It must be used for driving motors that are subject in that application to high
overload torques in relation to their rated torque, when operating in constant speed, during start, acceleration
or deceleration.
I : Inverter rated current for use with heavy overload regimen (HD=Heavy Duty).
nom-HD
Overload: 1.5 x I
nom-HD
Rectifier: The input circuit of the inverters that converts the input AC voltage into DC. It is formed by power
diodes.
Pre-charge Circuit: It charges the DC Link capacitors with a limited current, thus avoiding current peaks when
powering the inverter.
DC Link: This is the inverter intermediate circuit, with DC voltage and current, obtained from the rectification
of the AC supply voltage, or from an external source; it supplies the output IGBTs inverter bridge.
U, V and W Arm: It is a set of two IGBTs of the phases U, V and W at the inverter output.
IGBT: "Insulated Gate Bipolar Transistor"; It is the basic component of the output inverter bridge. It operates
like an electronic switch in the saturated (closed switch) and cut (open switch) modes.
Buy: www.ValinOnline.com | Phone 844-385-3099 | Email: CustomerService@valin.com
and overload of 110 % during 1 minute. It is selected by programming P0298
nom-ND
/ 1 minute.
and overload of 150 % during 1 minute. It is selected by programming P0298
nom-HD
/ 1 minute.

General Information

GENERAL INFORMATION
2
2-1