Motors - TEA Machine Components Inc.

MOTOREN
NECKAR
Technology
Brushless Direct current Motors
The series M and MH electronically commutated
direct current motors are of similar
construction to induction motors. The 12-
slot stator is equipped with a 4-pole winding.
Adjustment of the winding to the voltage
and operating conditions is possible.
In comparison to the induction motor a rotor
is used here with high-quality Neodymium
magnets instead of the “simple” squirrel-cage.
Rotor position detection is integrated in the
motor. This consists of a magnetic disk rotating
with the rotor and three Hall sensors
arranged at 120°.
The signals from the rotor position detection
are evaluated by the control electronics
required for operation. According to
the position of the rotor the winding
strands are streamed according to the following
control scheme.
Properties:
The series M electronically commutated
direct current motors are characterised by
extreme reversing and acceleration properties.
Series M is to some degree
replaceable with other current types of
similar size.
While the service life of mechanically
commutated direct current motors depends
on that of the brushes, lying at approx.
3,000–5,000 hours, the service life of an
electronically commutated direct current
motor only depends on the service life expectancy
of the ball bearings, lying at
over 20,000, presuming professional installation.
The electronically commutated
motor combines the known advantages of
the 3-phase motor and the special features
of the MH-motor in an almost exemplary
fashion.
The connection between speed, number of poles and number of slots on the stator can
be seen in the following table.
Rated speed No. of poles No. of slots
3000 min –1 4 12
750 min –1 8 24
Standard control scheme
left-hand rotation right-hand rotation
Control scheme
1 Revolution
Besonderheiten des MH-Motors
As already mentiones, external control
electronics are required for operation of
the M-motors. With the development of
integrated electronics we have been able
to integrate a complete 1-Q-Controller into
the motor. A lot of new ideas had to be
used for this. The advantages of this solution
are numerous:
Sensor 1
Sensor 2
Sensor 3
Commutation
phase
Motor phase A
Motor phase B
Motor phase C
Motor phase A
Motor phase B
Motor phase C
– The sensitive rotor position detection
leads do not have to be led out anymore.
– Damage caused by rotor position detector
wiring faults can not occur.
– The control of complex machines is
simplified.
– Continuous power as with motors with
external electronics
– Control range 30:1
– Rotation reversal, fault signal output,
impulse output (all SPS (Stored programme
controller) level), short circuit
braking and smooth starting with terminal
box K4 integrated as standard.
– Optional plug-and-socket connection.
– “Stand-Alone-Operation“ possible.
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