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[Translate to Englisch:] Resolver

Variable Reluctance Resolver

for Automotive

 

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Adjustments possible
Special requirements
Flexibility
in design
Superior performance
to environmental conditions

VR Resolver

VR: Variable Reluctance Type

A resolver is an angle sensor based on electromagnetic induction:

  • Absolute positioning of the resolver eliminates the need for referencing.
  • Fitted coils provide a magnetic field and allow to sense the rotational angle of the rotor in the stator.
  • External electronics excite the input coils by an alternating current.
  • On the receiving coils an output voltage proportional to the rational angle between rotor and stator can be detected.
  • Stator and rotor built consist of electro-magnetic steel sheets, which can be customized on request.

Usage

For Automotive typically used for:

  • Electric motors (e-motors) for full electric vehicles (EV) or hybrid electric vehicles (HEV)
    • Angular positioning of rotor / shaft of an e-motor
    • Determining of commutation timing
  • Rotational positioning of functional shafts, e.g. Electric Power Steering (EPS)
    • Determining the absolute shaft position

Detailed illustration        

Applications of VR Resolver

Applications of Variable Reluctance (VR) Resolver

Range of Common Sizes (click to enlarge picture)

Characteristics of Common Sizes (click to enlarge picture)

Advantages of Resolver

Advantages

  • Robust rotation angle detection
  • Particularly good performance to environmental conditions
    • Made for use in harsh environments
    • Insensitive to pollution
    • Wide temperature range

Customization –
Flexibility in design

  • Selection of multipliers fitting to the number of pole pairs of the electric motor
  • Special versions for use immersed in oil
  • Fixation of stator can be customized
  • Assemblies, i.e. Thermistor
  • Individual coating
  • Different connection types, e.g. direct or wire harness
  • Wire output direction axial or radial
  • Wire harness adjustable
Customization – Flexibility in design

Reliability Testing

Customized Evaluations

Various test options available (click to enlarge picture)

Experience in the evaluation of various ATF oils
Regarding:      - Oil resistance        - Oil storage        - Oil tightness

Functionality of VR Resolver

Functionality of VR Resolver

VR Resolver applications for New Mobility

[Translate to Englisch:] Airtaxi
Robotics
[Translate to Englisch:] E-Bike
Agriculture

Your contact person

Swen Cadrien
Swen Cadrien

NMB-Minebea-GmbH
Phone:  +49 173 436 88 24