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Linear motion Moving coil actuators
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The new Moenninghoff type 820 voice coil actuators replace the earlier type 810 which is no longer available.  They suit highly dynamic applications with strokes up to 50mm and forces 5 to 163N. Also known as moving coil actuators, they are non-commutated DC linear drives with function based on the principle of Lorentz force.



Moenninghoff voice coil actuators are designed as precision devices with higher cost that is justified in applications by high precision and/or very high frequency of operation.  They should not be considered as a simple low cost actuator.  In many applications encoder feedback and a servo-type controller will be needed and we can recommend suitable suppliers.

MOUNTING

Moenninghoff voice coil actuators feature an integral guidance of the moving coil assembly by low friction plain  bearings: alternatively, the bearing can also be provided via the connected custom components.  These can be attached either to the end of the coil assembly or the guide pin.

If the voice coil actuators are brought to act against a spring with a rising linear characteristic, they can move to the various positions within the stroke range in an open control loop with current as the control variable.

Since the electrical wiring is subjected to high mechanical  stress at high stroke frequencies, the Monninghoff voice coil actuators are provided with special highly flexible standard interconnecting wires as standard.  An alternative patented power supply via an enclosed flexible printed circuit foil is available for the highest dynamics.

APPLICATIONS

Due to their electromechanics and optimised design as linear direct drives, the Monninghoff voice coil actuators are particularly suited for actuator tasks that require a precise and dynamic control of force or position.  For this reason, they are frequently superior to pneumatic cylinders and electromagnets. Typical applications are:


Vibrating tables             Focusing of lasers/lenses

Laser cutting tools         Medical equipment

Micro assembly              Dosing

TECHNICAL DATA

MOVING COIL ACTUATORS FOR PRECISION IN SHORT STROKES

SMALL ELECTRIC ACTUATORS WITH VOICE COIL TECHNOLOGY TYPE 820

Size

Body
dia.

High force     version
Force (N)      Stroke

Long stroke   Version

Force (N)    Stroke

5

30

8

5

4

15

13

50

33

5

13

20

15

70

82

10

28

35

21

90

163

10

56

50

LINKS

Bauteile

1 Spulenteil
2 Boden
3 Hulse
4 Magnet
5 Polscheibe
6 Fuhrungsbolzen
7 Gleitlager
8 O-Ring
9 Sicherungsring
10 Magnettrager

Components

1 Coil assembly
2 Bottom
3 Shell
4 Magnet
5 Pole plate
6 Guide pin
7 Plain bearing
8 O-Ring
9 Retaining ring
10 Magnet holder

Magnetfluss (gelb)/ magnetic flux (yellow)