OTHER: Electrical - Motor - Stator - Sheet-metal Lamellae

• The stator core is laminated to reduce eddy current losses.
• The thickness varies accordingly to the frequency of operation. In machines for 60 Hz lamination thickness is typically 0.014" (0.355 mm).
• Ferromagnetic material
• It appears that the plane of the laminations normal to the axis of the rotor's rotation. Is this always the case? And if so, why?
• Can the sheet metal pieces have one or more bends put in them to provide a 3-dimentional aspect to the flow of the flux similar to that which can be done with Soft Magnetic Composite (SMC)?
• "Too reduce the core loss, lamination thickness of 0.1 mm has been used [Source ~ PMMT p.370] 0.1mm thick laminates is mentioned on a number of pages. For reference; the laminates on the furnace motors are 0.5 mm.
• Since the rotation of the motor is always in one direction could an increase in power be achieved by having a difference between the thickness or shape of the leading pole tips to those of the trailing pole tips?
• "LaminationsThe induced eddy currents in Ohmic conductors results in Ohmic heating. This is useful in induction furnaces that melt metals, but is undesired in many iron core devices. To reduce this power loss, the cores are often sliced into many thin sheets electrically insulated from each other by thin oxide coatings. The current flow is then confined to lie within a thin sheet and cannot cross over between sheets. "
• I put an Ohm meter (logic detector) on the laments of the F&P stator and it detects a connection between all lamenates

• What's new in motor lamination steel technology?

• Metglas
• See [Source ~ PMMT Section 6.12.8]

• [Source ~ PMMT [Source ~ PMMT Section 6.12.9]
• http://www.rcgroups.com/forums/search.php?searchid=25070676&query=cobalt%20steel%20laminations
• Affordability of Power Density

• Idea for air-cooling of rotor on in-running motor: Make the spider laminates in a conventional manner. When stacking them rotate each group of 2, 3, 4, or > by one stator tooth. This will present a much larger laminate surface area to the air. In addition. the progressive rotation of them will result in the spider arms acting as blades with a pitch to force new air through the rotor. The "pitch' of the spider will be set by the count of laminates in each group. Note that the rotor loading will only be that of transmitting torque to the aero-rotor.

• US 4578853 ~ Method of making a stack of electrical sheet-metal lamellae with aligned winding slots, particularly armatures for dynamo electric machines
• US 6,515,396 ~ Stator flux ring having fastenable pole pieces and method of making same
• US 5,477,096 ~ Laminated core for a motor

• Electrotor-SloMo - Motor - Radial Flux - Stator
• DESIGN: Electrotor-SloMo ~ Motor - Stator - Soft Magnetic Composite (SMC)

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