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Motor + Suspension Check (MSC)

Motor + Suspension Check

Optional module of the KLIPPEL QC SYSTEM

  • Transducer nonlinearities
  • High-speed measurement
  • Voice coil offset in mm
  • Stiffness asymmetry in %
  • Results comparable to R&D System
  • Root cause information
  • Ensure consistency of production
  • Ultra fast testing at physical limit

The  Motor  +  Suspension  Check  is  a  unique  tool  for high-speed  identification  of  nonlinear  driver  parameters  on the production line. Based on patented KLIPPEL technology, effective  linear  and  nonlinear  parameters  (Bl(x)  and  Kms(x)) are identified to derive meaningful single value parameters like voice coil offset and suspension asymmetry. This provides valuable  information  for  taking  immediate  action  to  fix  the causes of loudspeaker distortion.

 

The driver under test may be operated in free air as well as in a sealed or vented enclosures, giving additional enclosure parameters (fbQb). Neither microphones nor mechanical sensors (lasers) are required, as all information is provided by the electrical input current, making the measurement immune to ambient noise.

Demo Experiment

the sensitivity of the MSC

The figure above illustrates the sensitivity of the MSC by measuring the influence of the gravity on the voice coil position. The measured value of 12 micrometer corresponds with the prediction using linear and nonlinear parameters.  

Related information

Other modules of the QC SYSTEM

General features of the QC SYSTEM

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