Construct · 1 fields · 1 citations

cogging: a standalone construct

One name. One construct. A landmark on the map.

● anchor · a standalone construct Nearest construct by meaning·not indexed
cogging1 CONSTRUCTCogging torqueHANSELMAN · COG TORQUE

A single standalone construct; nearby constructs are located against it in the Collider. Tap a field for its definition, unit, and measures.

Electrical machines

Position-dependent torque ripple in a motor

In electrical machines cogging torque is the parasitic, position-dependent torque in a permanent-magnet motor that arises from the interaction between the rotor magnets and the slotted stator iron, even with no current flowing; it makes an unpowered motor feel as though it notches or cogs as the shaft is turned, and it produces torque ripple and vibration that designers work to minimise. Duane Hanselman's Brushless Permanent Magnet Motor Design analyses the origin of cogging torque and the slot, pole, and skew choices that reduce it. The referent is a reluctance-driven torque ripple in a motor, sharing only its name with the carpentry joint and the metal-forming process.[1]

Unit
The no-current, position-dependent reluctance torque ripple of a slotted PM machine
Recovery means
Not applicable
Measured by
Quantified by its peak-to-peak amplitude and harmonic content versus rotor position, and by the slot and pole combination and skew used to suppress it

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Nearby constructs

bloom2 fields · 4 citationsjingle · one word, two constructsbreakdown3 fields · 6 citationsjingle · one word, three constructscarry1 fields · 1 citationsanchor · a standalone construct

References

  1. Hanselman, D. C. (2003). Brushless permanent magnet motor design (2nd ed.). The Writers' Collective. ISBN 9781932133639

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