WEG CFW-11W G2 RB Series User Manual page 9

General Information
DC-: Negative terminal of the DC Link.
Arm U, V and W: Conjunto de dois IGBTs das fases U, V e W de entrada do conversor regenerativo.
IGBT: Insulated Gate Bipolar Transistor: it is a basic component of the U, V and W arms. It operates like an
electronic switch in the saturated mode (closed switch) and cut off mode (open switch).
PTC: Resistor whose resistance value in ohms increases proportionally to the temperature; used as temperature
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sensor on motors.
NTC: Resistor whose resistance value in ohms decreases proportionally to the temperature increase; used as
temperature sensor on power packs.
HMI: Human-Machine Interface; it is a device that allows viewing and changing the converter parameters. The
HMI of the CFW-11M G2 RB features control keys for the regenerative frequency converter, navigation keys and
a display.
FLASH Memory: Nonvolatile memory that can be electrically written and erased.
RAM memory: Random access memory.
USB: Universal Serial Bus; serial communication protocol conceived to work according to the plug-and-play
concept.
PE: Protective earth.
RFI Filter: Radio Frequency Interference Filter; filter to reduce interference in the radio frequency band.
PWM: Pulse Width Modulation; pulsing voltage at the input of the regenerative frequency converter.
Switching Frequency: switching frequency of the IGBTs, usually given in kHz.
General enable: When enabled, the converter controls the voltage on the DC link. When disabled, the PWM
pulses will be immediately blocked. It is controlled via digital input programmed for such function.
Heatsink: Piece of metal designed to dissipate the heat generated by power semiconductors.
UP11 G2: Power unit of the CFW-11M G2 RB with air cooling.
UP11W G2: Power unit of the CFW-11W G2 RB with water cooling.
UC11 G2: Control Unit of the CFW-11M G2 RB and CFW-11W G2 RB.
PLC: Programmable logic controller.
Amp, A: Ampere.
°C: Degrees Celsius.
AC: Alternating current.
DC: Direct current.
CFM: Cubic feet per minute; a flow measurement unit.
cm: Centimeter
CV: Brazilian unit of power = 736 Watts; usually used to indicate mechanical power of electric motors.
ft: Foot.
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