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Simple view of ball bearing motor. A ball bearing motor is an unusual electric motor that consists of two ball-bearing -type bearings, with the inner races mounted on a common conductive shaft, and the outer races connected to a high current, low voltage power supply. An alternative construction fits the outer races inside a metal tube, while ...
Switched reluctance motor with magnetic flux lines. The switched reluctance motor ( SRM) is a type of reluctance motor. Unlike brushed DC motors, power is delivered to windings in the stator (case) rather than the rotor. This simplifies mechanical design because power does not have to be delivered to the moving rotor, which eliminates the need ...
Vector control (motor) Vector control, also called field-oriented control (FOC), is a variable-frequency drive (VFD) control method in which the stator currents of a three-phase AC or brushless DC electric motor are identified as two orthogonal components that can be visualized with a vector. One component defines the magnetic flux of the motor ...
A ball bearing. A bearing is a machine element that constrains relative motion to only the desired motion and reduces friction between moving parts.The design of the bearing may, for example, provide for free linear movement of the moving part or for free rotation around a fixed axis; or, it may prevent a motion by controlling the vectors of normal forces that bear on the moving parts.
A thrust ball bearing. A thrust bearing is a particular type of rotary bearing. Like other bearings they permanently rotate between parts, but they are designed to support a predominantly axial load. [ 1] Thrust bearings come in several varieties. Thrust ball bearings, composed of bearing balls supported in a ring, can be used in low-thrust ...
Bearing capacity. In geotechnical engineering, bearing capacity is the capacity of soil to support the loads applied to the ground. The bearing capacity of soil is the maximum average contact pressure between the foundation and the soil which should not produce shear failure in the soil. Ultimate bearing capacity is the theoretical maximum ...
The pressure is an affine function of cos θ: P (θ) = A ⋅cos θ - B. with A = K ⋅ j /cos θ 0 and B = A ⋅cos θ 0 . Case where the clearance can be neglected. If j ≃ 0 (R 1 ≃ R 2 ), then the contact is on the whole half-perimeter: 2θ 0 ≃ π and cos θ 0 ≃ 0. The value of 1/cos θ 0 rise towards infinity, thus.
The engine was dropped from production in 1998. [1] The CB-40 was re-engineered to overcome problems of vibration and cooling in the original design. [2] Suited for ultralight use and single seat light sport aircraft, the engine weighs 86 lbs and produces 40 hp (30 kW). The engine uses a short aluminum crankcase with redesigned oil galleries ...