![\"Axial](\"https:\/\/i0.wp.com\/www.boatingmag.com\/uploads\/2024\/12\/BTG1224-Outboards-Electric-Flux-2-1024x768.jpg?resize=800%2C600&ssl=1\")
<\/div>\n Courtesy EVOA<\/span><\/p>\n<\/figcaption><\/section>\n
Axial flux? Transverse flux? What do these terms mean? Why do they matter? What is flux, anyway? Here\u2019s a vocabulary primer for electric marine propulsion.<\/p>\n
Radial Flux Motor<\/h2>\n
To visualize a radial flux motor, think of two iron cylinders. One is fitted with magnets set around its outside and an axle running through its center (the rotor). Surrounding this cylinder is a larger one (the stator). Inside the stator cylinder is a series of ridges wound with copper wire. The wires are connected to a switch\u2014the commutator\u2014that alternately changes the current direction.<\/p>\n
The alternating current created by the \u00adcommutator induces magnetic fields around the stator\u2019s windings. These alternating pulses oscillate between south and north at 60 cycles per second (aka hertz). This force\u2014the flux\u2014acts at right angles to the rotor\u2019s permanent magnets, forcing it to turn. Because the pulses come so quickly, the rotor turns at full power immediately, providing the instant torque and acceleration for which electric vehicles are known.<\/p>\n
While relatively bulky and heavy because of the metal yokes around their stators and rotors, radial flux motors are easy to manufacture and require minimal maintenance over long service lives. Torqeedo manufactures radial flux marine motors.<\/p>\n
Read Next:<\/strong> Consistent Rating Standards Needed for Electric Motors<\/a><\/p>\n Next, imagine an \u00adelectric motor with a flat disk of nonferrous material serving as the stator. Set around its perimeter are a dozen half-inch-high stubs wound with wire. As before, alternating current feeds the windings. Facing the stator (like stacked pancakes) is another 6-inch disk\u2014the rotor\u2014with its permanent magnets fastened around its perimeter. The oscillating magnetic poles of the stator react with the poles in the rotor\u2019s permanent magnets, attracting and repulsing them. The flux force created causes the rotor and its shaft to turn, but notice that its flux acts in parallel\u2014axial\u2014with the axis of the shaft.<\/p>\n The lack of a yoke and locating the magnets away from the central axis result in higher power-to-weight ratios than equivalent\u00a0 radial flux motors.\u00a0The EVOA E1 and Acel outboards use axial flux motors.<\/p>\n A transverse flux \u00admotor runs on more-\u00adcomplex three-dimensional paths of magnetic flux. Instead\u00a0of copper wire wound around stator ridges, their coils run circumferentially, at right angles to the axis of rotation. The 3D flow of magnetic flux occurs \u00ada\u00adxially through the stator, radially through the air gap between them, and circumferentially through the rotor. The rotor has multiple permanent magnets axially in a ring around the motor\u2019s shaft. The stator arrangement involves laminated U-shaped structures securing a ring-shaped coil around the motor.<\/p>\n Transverse flux motors are even more complicated than axial flux motors. There\u2019s still only one moving part\u2014the \u00adrotor\u2014but more magnets, wire, and structures to hold them precisely in intricate \u00adpositions. Transverse flux motors offer the highest torque and power density. Mercury Marine\u2019s Avator outboards are transverse flux motors.<\/p>\n The post The Differences Between Radial, Axial and Transverse Flux Motors<\/a> appeared first on Boating Mag<\/a>.<\/p>\n<\/div>\n![\"Acel](\"https:\/\/i0.wp.com\/www.boatingmag.com\/uploads\/2024\/12\/BTG1224-Outboards-Electric-Flux-1024x768.jpg?resize=800%2C600&ssl=1\")
<\/div>
\n Courtesy Acel Power<\/span><\/p>\n<\/figcaption><\/section>\nAxial Flux Motor<\/h2>\n
Transverse Flux Motor<\/h2>\n