General Information; About The Manual; Terms And Definitions Used In The Manual - WEG DBW04 Serie Manual Del Usuario

General Information

2 GENERAL INFORMATION

2.1 ABOUT THE MANUAL

This manual contains information regarding the proper installation and operation, start-up,
the main characteristics and shows how to troubleshoot the most common problems of the
DBW04 braking module.
The DBW04 is an accessory that enables the braking of motors driven by inverters, with reduced
time, providing faster dynamics when necessary.

2.2 TERMS AND DEFINITIONS USED IN THE MANUAL

DC Link: inverter intermediate circuit. DC voltage obtained from the rectification of the AC input
voltage or from an external power supply. It supplies the output inverter bridge, formed by IGBTs.
Inverter: circuit that transforms the direct voltage of the DC link into alternate voltage AC.
IGBT: Insulated Gate Bipolar Transistor - basic component of the output inverters. They work
as electronic switches in the modes: saturated (closed switch) and cut off (open switch).
Braking IGBT: works as a switch to turn on the braking resistors. It is controlled by the DC
link level.
PE: Protective Earth.
PWM: Pulse Width Modulation; modulation by pulse width; pulsed voltage generated by the
output inverter which feeds the motor.
Switching Frequency: it is the inverter bridge IGBTs commutation frequency, specified
normally in kHz.
Heatsink: it is a metal part designed for dissipating the heat generated by the power
semiconductors.
Amp, A: amperes.
°C: Celsius degree.
°F: Fahrenheit degree.
AC: alternating current.
DC: direct current.
CFM: "Cubic Feet per Minute"; it is a flow measurement unit.
cm: centimeter.
hp: "Horse Power" = 746 Watts (power measurement unit, normally used to indicate the
mechanical power of electric motors).
Hz: hertz.
l/s: liters per second.
6 | DBW04