14(80) Technical data vacon
Vacon Oyj Telephone: +358-201-2121 Fax: +358-201-212 205
24-hour support: +358-40-8371 150 Email: vacon@vacon.com
4
4. TECHNICAL DATA
4.1 Introduction
Vacon NXL is a compact, small-sized frequency converter with the output ranging from 220 W to
30 kW. It is well adapted for HVAC and OEM applications where its possibilities of use are almost
unlimited.
The Motor and Application Control Block is based on microprocessor software. The microprocessor
controls the motor basing on the information it receives through measurements, parameter settings,
control I/O and control keypad. The motor and application control block controls the motor control
microprocessor which, in turn, calculates the IGBT positions. Gate drivers amplify these signals for
driving the IGBT inverter bridge.
The control keypad constitutes a link between the user and the frequency converter. The control
keypad is used for parameter setting, reading status data and giving control commands. Instead of
the control keypad, also a PC can be used to control the frequency converter if connected through a
cable and a serial interface adapter (optional equipment).
You can have your Vacon NXL drive equipped with control I/O boards NXOPTAA, NXOPTB_ or
NXOPTC_.
All other sizes but MF2 have an internal brake chopper. For closer information, contact the
Manufacturer or your local distributor (see back cover). The input EMC filters are available as
options externally for MF2 and MF3. In other sizes the filters are internal and included as standard.
The NXL frequency converters are professional drives intended to be connected to industrial
networks. They should not be connected to public low- voltage distribution systems. This is a product
of the restricted sales distribution class according to IEC 61800-3. In a domestic environment this
product may cause radio interference in which case the user may be required to take adequate
measures.
Sizes MF4 – MF6:
The three-phase AC-choke at the mains end together with the DC-link capacitor form an LC-filter,
which, again, together with the diode bridge produce the DC-voltage supply to the IGBT Inverter
Bridge block. The AC-choke also functions as a filter against High Frequency disturbances from the
mains as well as against those caused by the frequency converter to the mains. It, in addition,
enhances the waveform of the input current to the frequency converter. The entire power drawn by
the frequency converter from the mains is active power.
The IGBT Inverter Bridge produces a symmetrical, 3-phase PWM-modulated AC-voltage to the
motor.
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