GA 05.139/1.02 - 06/99
Description
5
Motor and control
A DC motor without commutator is used to power the
rotor.
Drive voltage for the motor and the operating voltage for
the magnetic bearing are supplied by the MAG.DRIVE
frequency converter. It also handles the automatic moni-
toring of these systems.
The pump is equipped with a data storage device which
stores the important operating parameters during the
complete operation time of the pump.
The converter monitors continously all important opera-
ting parameters and provides warning and alarm signals
in case the operating conditions exceed the specification
or the set threshold.
1.4 Function and design of
the MAG.DRIVE
The MAG.DRIVE 2000 electronic converter is used to
drive the MAG turbo-molecular pumps.
The electronic converter converts the single-phase line
supply voltage into a three-phase DC voltage to control
and monitor the electronically-commutated DC motor. It
also evaluates measured signals and controls (open-
loop and closed-loop) the pump functions.
The temperature management system (TMS) and the
magnetic bearing control system are integrated into the
converter. The TMS regulates the pump temperature by
switching the heating on/off or cooling the pump. The
magnetic bearing control system actively controls the
pump rotor in five axes (closed-loop control).
All parameters required for pump operation and the
listed faults and operating hours are stored in a non-
volatile memory in the pump. When the converter is swit-
ched on, the data are loaded into the converter from the
pump.
The outputs of the electronic converter are no-load and
short-circuit proof.
For remote control via control connector X14 we recom-
mend that either a relay or optocoupler is used to provi-
de electrical decoupling.
Housing
The converter is supplied with a closed housing. It can
be installed in a 19” cabinet; see Section 2.8.
Front panel
Main switch
9-pin connecting socket for the plug-in control or for
connection of a serial interface
2 short-stroke keys
1 green/red STATUS LED
1 green COM LED (communications interface)
1 green MAIN LED (line supply voltage)
2 fuses TMS (Temperature Management System)
The optional plug-in control has 10 keys and 1 LCD with
2 lines, each 16 characters. The plug-in control displays
operating statuses and failures and allows the configura-
tion of the pumping system.
Rear panel
X14 50-pin D socket connector for remote monitoring
and open-loop control
X19 3-pin Hirschmann connector for the connection to
the mains supply
X20 55-pin MIL standard socket connector for internal
sensors and magnetic bearing connection
X21 41-pin MIL standard socket connector for the motor,
TMS, and purge valve connection
Spare slot for optional network cards, e.g. Device
Net
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