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Installation Guide Linear Motors
3 Product description
3.1 Structure
LinMot ATEX linear motors are assembled into a complete servo drive system consisting of several
connected components (see the illustration below). Only the motor is located in the "hazardous" area, all
other components are located on the "safe" side.
« Safe side »
Control cabinet
Pos. 1: Circuit breaker
Pos. 2: Power supply
Pos. 3: Control unit «LinMot Drive»
Pos. 4: Temperature relay
Pos. 5: Power
3.1.1 Linear Motor
LinMot motors are direct-drive electromagnetic tubular linear motors.
The main components of the motor are the stator and the slider. The slider, the so-called "magnet bar",
consists of permanent magnets that are arranged with alternating polarization. The stator contains the
windings and position sensors. The windings are fed with current at an appropriate electrical phase angle,
like a permanently excited synchronous motor, thus producing a force in the desired direction. The motor has
2 to 4 temperature sensors on the windings depending on the length. These sensors can be used with a
series x1100 or x1200 LinMot drive to read and analyze the absolute temperature. This allows the winding
temperature to be determined and the motor to be switched off if the motor runs too hot. If the drive can no
longer communicate with the motor, then it will shift to a fault state. Feedback is provided to the control
system. The position is sensed by measuring the magnetic field of the slider.
The stator is encapsulated and welded completely shut.
ATEX linear motors can be equipped with a copper cooling system as an option.
3.1.2 LinMot Servo Drive
Takes over the current control, positioning control and temperature monitoring of the motor as well as
monitoring the power section.
NTI AG / LinMot
Pos. 6: Signals (Motorcom., Internal temp. monitoring)
Pos. 7: Linear motor
Pos. 8: Temperature sensors Pt1000
Pos. 9: Pt1000 temperature signals
P01-48-HP EX protected
« Hazardous side »
EX environment
ENG
Page 9 / 47
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