1 System Overview
1
1 SYSTEM OVERVIEW
The IMC15 (Integrated Magnetic Bearing and Motor Controller,
15 kW) integrates electronics (MBE) for operating a five axes
active magnetic bearing system (AMB) as well as a frequency
converter (FC) for driving permanent magnet synchronous
motors with power ratings of up to 15 kW.
The magnetic bearing electronics is a proven MECOS desgin
which, as a new feature, supports cables longer than 23
meters in which case a sensor amplifier, type SMX6B (Sensor
Matching Box), has to be mounted on the blower. The motor
drive features constant voltage DC bus, IGBT power stage,
output harmonics filter and vector control, thus providing
excellent dynamic performance. Output filter and dynamic
breaking resistor are integrated into the housing of the IMC15,
thus,no additional installation work is required.
The drive as well as the MBE are fed from the same DC bus
and are controlled by the same processor. This architecture
not only allows to control the entire system over one single
interface but also to safely shut down the system in case of a
mains failure by using the kinetic energy of the rotor fed back
into the DC bus (generator operation).
Acting as interfaces to the IMC15 are a display with a keypad,
a CAN bus interface and a digital interface (Dig I/O) that can
be configured to meet specific requirements. Display and key-
pad give the user or operator access to all basic functions
whereas the field bus together with the corresponding soft-
ware package allows to freely configure the entire system. The
Dig I/O interface is designed for use with a PLC and offers 8
digital channels that can be configured as either inputs or out-
puts. Additionally an insulated 24V supply is available on the
same connector.
A glossary explaining the most frequent acronyms and abbre-
viations used throughout this manual can be consulted in the
appendix.
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