Solid motor design combined with innovative speed control.
The motor design is brushless. It used Hall sensors and an integrated electronic
board for commuting the motor coils. This is a must for a smooth motor movement
and for elimination of distortion by usual brushes. The motor coils are air core
types. So there is no magnetic rest point or hysteresis loss. An optical sensor
is used for continuous speed feedback.
As the motor bearing is also the platter bearing, we spent special attention on its
design. The radial force is carried by a precision sinter metal bearing. For the
axial forces, we spent the motor a bearing bottom out of polyamide. This design
guarantees very low noise movement and high precision bearing gap, combined with
The rotor unit is also a sub platter. So it is easy to combine with al kind of
platter designs. All motor components are integrated is a solid metal housing,
which eliminates all kind of vibration.
For our "langer" motor, we designed a special speed controller. This controller
is an analog design. That means we use an analog signal for the motor speed feedback
and compare it with an analog reference. The output signal to the motor is again
analog. In combination with a correctly designed platter, the signal to the motor
is a simple line, absolutely low level and flat. In normal drive condition, the
motor acts just as a precision bearing plus a little energy for the friction losses.
Only in start mode or at higher break forces, it increases the drive current
accordingly to the needed level. Long waiting times for stabilized platter speed
as a compromise for low wow and flutter and low noise, is no longer needed. The
"langer direct drive" features both without compromising.
Components for DIY and OEM partners:
We do not use our drive technology exclusively only in our turntables. We also
offer them as components for high quality DIY projects or OEM partners. The
integration of our technology in other projects is very easy by design.