Electromagnetic Gearing Advances

{Patent applied}

Electromagnetic gearing represents a significant advancement over traditional mechanical power transmission. Rather than relying on interlocking physical teeth, these systems utilize electromagnetic coils and permanent magnets to transfer rotary motion without mechanical contact.

In spur gear power transmission, typically only one or two teeth are engaged at any given time. A standard spur gear pair exhibits a contact ratio between 1.2 and 1.6, indicating that for most of the meshing cycle, a single tooth pair bears the load, with brief transitions to two pairs.

The new electromagnetic gears can transfer rotary motion from one shaft to another without a mechanical connection, using an electromagnetic coupling. This will enable the reduction of heavy metal shafts and gears, improving the assembly's reliability while reducing the weight. As a result, electromagnetic gears can transfer motion regardless of the relative angle. Although they provide a motion ratio similar to that of traditional gears, they operate without contact.

It features:
Non-Contact Power Transfer: Rotary motion is transferred from an input shaft to an output shaft via an electromagnetic connection. Because there is no physical contact, the system can transfer motion regardless of the relative angle between the shafts.
Dynamic/Variable Gear Ratios: Unlike traditional magnetic gears that have fixed physical ratios, electromagnetic gears can alter their effective number of magnetic poles in real time. This is done by dynamically changing how the coils are energized, adjusting the magnetic field strength and sequence.
Full Engagement: In standard mechanical gearing (like spur gears), power is typically shared by only 1 to 2 teeth at a time during the meshing cycle. In an electromagnetic gear, the magnetic fields allow the equivalent of the entire output wheel's "teeth" to be engaged simultaneously to deliver movement.

Examples of application:
In an IC engine, power from the crankshaft has to be transferred to the camshaft at half the crank speed using gear wheels, which requires a large space and accommodates the space of the engine body. Electromagnetic gearing uses electromagnetic coils and permanent magnets to achieve variable gear ratios, enabling dynamic control and adaptability. Unlike traditional magnetic gears, which are limited to fixed ratios, electromagnetic designs allow real-time adjustment of torque and speed via coil excitation. This makes them ideal for applications requiring precision, efficiency, and responsiveness, such as in electric vehicles and industrial automation. Electromagnetic coils allow variable gear ratios by controlling the magnetic field strength and sequence rather than relying on fixed physical gear teeth. The new electromagnetic gears are capable of transferring rotary motion from an input shaft to an output shaft without a mechanical connection between the sad two shafts, through an electrical connection. This will enable to reduce heavy metal shafts and gears to reduce the weight and improve the reliability of the assembly of components. As a result, electromagnetic gears are able to transfer motion no matter the relative angle. Although they provide a motion ratio as a traditional gear, such gears work without touching and are immune to wear of mating surfaces, have no noise, and slip without damage.

Electromagnetic coils allow variable gear ratios by controlling the magnetic field strength and sequence rather than relying on fixed physical gear teeth.
The signal strength of the input may be amplified when the energized signal is fed to the output shaft.

In an electromagnetic gear, the effective number of magnetic poles can be altered dynamically by changing how the coils are energized.

Usually, in mechanical gearing, power is transmitted to the output through one gear tooth, but in electromagnetic gearing, the entire output wheel's teeth may be engaged in delivering movement.
Electromagnetic Gears in Propulsion and Industry
Examples of applications where you can replace connections between two shafts:

A straight connection between the input shaft and the output shaft
Connection between two shafts in different geometries
Belt connection between two shafts
Chain connection between two shafts
Connection between two shafts using a universal joint
Connection between two shafts where the output shaft has to run at a different speed
Connection of the second shaft in which it has to drive in the opposite direction
It includes replacing gearboxes, belt drives, and chain drives with electromagnetic gears. Reverse can be arranged by placing coils in reverse positions on output shaft.

 

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