English
GENERAL INFORMATION
Heatsink:
metal device designed to dissipate the heat generated by the power semiconductors.
RFI filter:
Radio Frequency Interference Filter, is a filter used to reduce interference in the radio frequency range.
Switching frequency:
frequency of the IGBTs switching in the inverter bridge.
ft:
foot. Is a unit of measure of length.
Gate driver:
circuit used to turn the IGBTs on and off in a controlled and safe way.
Start/Stop:
function of the inverter that, when enabled (Run), accelerates the motor by acceleration ramp up to
the reference speed and, when disabled (Stop), decelerates the motor by deceleration ramp until full stop, when
the PWM pulses are then locked.
General Enable:
when activated, this function accelerates the motor via acceleration ramp set in the inverter.
When deactivated, this function immediately blocks the PWM pulses. It can be controlled by digital input or via
serial communication.
HMI:
Human Machine Interface; device that allows controlling the inverter parameters.
hp:
Horse Power, corresponds to 746 watts.
Hz:
hertz.
I
nom-HD
:
inverter rated current for use with the heavy duty. Overload:
1
.
5
·
I
nom
−
HD
1
min
I
nom-ND
:
inverter rated current for use with the normal duty. Overload:
1
.
1
·
I
nom
−
N D
1
min
Braking IGBT:
works as a switch to activate the braking resistors; it is controlled by the DC Link voltage level.
IGBT:
Insulated Gate Bipolar Transistor, basic component of the output inverter bridge.
in:
inch.
k:
kilo (
10
3
)
kg:
kilogram = 1000 grams.
l:
liters.
lb:
pound.
m:
If isolated, indicates meter; together with another unit of measurement, indicates milli (
10
−
3
)
Frame:
designation related to the dimension of the product for a certain power range.
FLASH memory:
non-volatile memory that can be electronically written and erased.
min:
minute.
N.m:
newton meter; unit of torque.
NTC:
Negative Temperature Coefficient; a component that reduces its electrical resistance when the temperature
increases.
PE:
Protective Earth.
PTC:
Positive Temperature Coefficient; a component that increases its electrical resistance when the temperature
increases.
PWM:
Pulse Width Modulation.
Normal Duty (ND):
refers to the inverter duty cycle with maximum values of current in continuous operation equal
to I
nom-ND
and overload of 110% for 1 minute. It can be configured in C3.9.3 and must be used to drive motors
that, in the application, are not subject to high overload torques in relation to their rated torque when operating at
constant speed, starting, accelerating or decelerating.
Heavy Duty (HD):
refers to the inverter duty cycle with maximum values of current in continuous operation equal to
I
nom-HD
and overload of 150% for 1 minute. It can be configured in C3.9.3 and must be used to drive motors that,
in the application, are subject to high overload torques in relation to their rated torque when operating at constant
speed, starting, accelerating or decelerating.
Rectifier:
inverter input circuit that transforms the input AC voltage into DC, formed by thyristors and/or power
4 | CFW900
