H - Electricity – 02 – K
Patent
H - Electricity
02
K
310/79
H02K 1/14 (2006.01) H02K 1/16 (2006.01) H02K 1/17 (2006.01) H02K 1/27 (2006.01) H02K 29/00 (2006.01) H02K 29/12 (2006.01)
Patent
CA 2005533
An electronically commutated motor has substantially constant air gap energy to reduce cogging. A rotatable assembly has a plurality of permanent magnet elements which rotate about an axis of rotation as the rotatable assembly rotates. The elements are oriented with respect to said axis of rotation to provide a magnetic field with lines of flux along a plane forming a skew angle of s1 mechanical degrees with respect to the axis of rotation, wherein s is not equal to zero. The elements may be provided with an unmagnetized portion referred to as a phantom skew. A stationary assembly is in magnetic coupling relation with the permanent magnet elements of the rotatable assembly and has t spaced teeth with adjacent teeth defining a slot therebetween, wherein t is positive integer. Each tooth has a surface adjacent the rotatable assembly having one or more notches forming a skew angle of s2 mechanical degrees with the axis of rotation. Each tooth has winding stages adapted for commutation in at least one preselected sequence. The skewed magnetic field, skewed notches and phantom magnetic skews reduce cogging between the rotatable assembly and the stationary assembly as the rotatable assembly rotates while maintaining a back EMF waveform having a maximized flat top width.
Harms Harold Barnard
Krefta Ronald John
Oldenkamp John Leonard
Company General Electric
Craig Wilson And Company
LandOfFree
Electronically commutated motor and stationary assembly... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electronically commutated motor and stationary assembly..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronically commutated motor and stationary assembly... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1582035