Electromagnetic Gearing Advances

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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 mechanical 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 introduced 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.

This device and method is an Electromagnetic transmission system for direct link-to-link power coupling. 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.

In the illustrated diagram, both the input and output wheels feature alternating magnetic slots positioned opposite electromagnetic coils. These coils create electromagnetic induction. The input wheel's primary coil sends an amplified electromagnetic pulse to coils 1 and 4 of output wheel. Coil B on the input wheel directs pulses, via the amplifier, to output coils 2 and 5 on the output shaft of the output wheel. Similarly, Coil C transmits signals through the amplifier to coils 3 and 6 of the output wheel. This design ensures each input coil energizes two output coils, with all power amplified by a shared power supply.

This method replaces physical gear teeth with field-modulated electromagnetic forces. By linking high-resolution front-wheel steering data with an electronic control unit (ECU), This system creates a frictionless virtual transmission. Power is transferred across an air gap using alternating magnetic poles, completely eliminating mechanical contact.

The method and procedure solves the limitations of rigid mechanical and traditional magnetic gears by providing an electromagnetic transmission system that decouples the input and output shafts via a flexible electrical conductor bridge. The system comprises an input assembly and an output assembly connected exclusively via wire windings. The input assembly includes an input shaft secured to a first wheel, the first wheel having a plurality of permanent magnets arranged around its periphery. Positioned in close proximity to these magnets, but without physical contact, is a first set of stationary coil windings. As the input shaft rotates, the moving magnetic fields induce a localized magnetic flux variation within the first coil windings, generating a continuous sequence of electrical pulses. Concurrently, the system features an output assembly positioned at a distance or angle from the input assembly. The output assembly comprises a second set of coil windings electrically coupled to the first coil windings via a flexible wire network. A second wheel, secured to an output shaft and featuring a second plurality of permanent magnets around its periphery, is positioned adjacent to the second coil windings. When the electrical pulses generated at the input assembly travel through the wire network into the second coil windings, they generate a dynamic, reproducing magnetic flux. This induced flux interacts electromagnetically with the permanent magnets of the second wheel, creating a driving torque that forces the output wheel and its attached output shaft to rotate about its center. In a highly advantageous aspect of the invention, the system can operate as a direct passive transmission, or it can selectively include an inline power booster (such as an amplifier or auxiliary power source) to increase the current flow between the first and second windings, thereby amplifying the output torque or speed without changing the mechanical input.

As illustrated conceptually by the system architecture, the electromagnetic transmission consists of two primary operational stages linked solely by an electrical conduction pathway, entirely removing the requirement for physical alignment or intervening mechanical linkages.

 

 

The Generation Stage (Input Assembly)

The input stage utilizes a rotational-to-electrical transduction mechanism. An input shaft, driven by an external prime mover (such as an internal combustion engine or an electric motor), is rigidly fixed to the center of a first rotational wheel. Distributed circumferentially around this first wheel is a structured array of magnetic elements, preferably high-energy permanent magnets (e.g., Neodymium-Iron-Boron magnets) arranged in an alternating north-south pole configuration. A stationary stator core supporting a series of isolated wire windings is positioned to encircle or sit adjacent to the path of the rotating permanent magnets. Crucially, a precise air gap is maintained between the rotating magnets and the stationary windings to prevent physical wear. As the input shaft turns, the moving magnetic flux cuts through the stationary wire loops. According to Faraday's Law of Electromagnetic Induction, this action induces an alternating electromotive force (EMF), manifesting as a stream of electrical pulses proportional to the rotational speed and magnet density of the input wheel.2. The Transmission Bridge (Conductor Network) unlike conventional transmissions that require straight lines-of-sight, the current generated in the input windings is fed directly into a flexible wire connection network. This wire network can navigate complex geometric routing inside an automobile chassis or machine frame.

The Actuation Stage (Output Assembly)

The output stage utilizes an electrical-to-rotational transduction mechanism located at the terminal end of the wire network. The electrical pulses enter a second set of stationary wire windings wrapped around a secondary stator structure. The influx of current creates a localized, rapidly shifting electromagnetic field. Positioned across an air gap from these secondary windings is a second rotational wheel fixed securely to the output shaft. This second wheel features its own circumferential array of permanent magnets. The dynamic magnetic flux generated by the secondary windings pushes and pulls against the permanent magnets of the output wheel, creating continuous rotational torque about its center axis. Consequently, the output shaft rotates in synchronized alignment with the input shaft, completely free of any mechanical rods, chains, or joints.

General assembly of input and output linked by wires only

 

3 D view of the assembly with engagement of multiple of output slots

In this optional mode input signal can be fed to another location of out put wheel by amplifying by the same power supply, so that it resilt better grip and more power will be aailable in the output shaft.

This is a method and device applicable in power transmission between the input shaft and the output shaft, eliminating other drives like shafts, rods, chains, belts, and mechanical joints used in power transmission from one link to another. Based on this specific utility-eliminating intermediate hardware like secondary shafts, rods, chains, belts, and mechanical joints to transmit power directly from an input link to an output link.

Mechanical drive Vs Electromagnetic drive Comparison Table

Aspect	Mechanical Shaft Drive	Electro-magnetic Transmission
Power Transfer	Direct torque via drive shaft	Alternator generate electricity send through cables
Efficiency	High at constasnt speed, losses in joints	Slight conversion loss, but felxible control
Maintenance	Requires lubrication and alighnment	Mostly electronic, fewer moving parts
Flexibility	Fixed gear ratio	Variable torque and speed via inverter
Noise and vibration	Mechanical contact causes noise	Smooth, silent operation
Scalability	Limited by shaft length	Easy to extend or modularize

 

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:

1.A straight connection between the input shaft and the output shaft

2.Connection between two shafts in different geometries

3.Belt connection between two shafts

4.Chain connection between two shafts

5.Connection between two shafts using a universal joint

6.Connection between two shafts where the output shaft has to run at a different speed

7.Connection of the second shaft in which it has to drive in the opposite direction

8.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.

This concept illustrates a breakthrough in vehicle power transmission - replacing the traditional mechanical driveshaft with an electromagnetic system.

 

Examples of application:

1. In an I.C. engine, power transmission from crank shaft to cam shaft

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 said 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.

2. Contactless Electromagnetic Gearing & Virtual Differential System in automobile power transmission

An adaptive steering rod attachment will allows to calibrate rear wheel actuation to unique steering ratios. This ensures consistent behavior at turns, with rear wheels responding to the actual road wheel angle rather than raw steering input.

Rear Wheel Synchronization: If the automobile system directly links rear wheel actuation to steering input; we need a translation layer that converts the actual front wheel turning angle (not just steering wheel rotation) into the correct rear wheel response.

Control Logic should be implimented, instead of mapping rear wheel movement to steering wheel rotation; maping it to the road wheel angle. This ensures consistency across different steering ratios.
Input: Steering wheel rotation converted via steering ratio to actual front wheel angle.
Output: Rear wheel actuator angle = function (front wheel angle, speed, and desired handling mode).

Practical Implementation
Using a sensor on the steering rack or front wheel knuckle to measure actual turning angle.
Feed this into the electromagnetic gear control unit that drives the rear actuators.
Apply a lookup table or algorithm that adjusts rear wheel angle based on speed and front wheel angle, independent of steering ratio.

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

This concept illustrates a breakthrough in vehicle power transmission - replacing the traditional mechanical driveshaft with an electromagnetic system. The internal combustion engine drives an alternator that sends three phase electrical power through cables to rear mounted motors. These motors convert electricity back into torque, propelling the wheels without any physical shaft connection. Designed in collaboration with Copilot, this approach demonstrates how smart electrical coupling can deliver smoother, quieter, and more efficient motion for next generation vehicles.

This electromagnetic differential system replaces heavy mechanical linkages with intelligent magnetic synchronization. By dynamically energizing coils, each wheel motor adjusts torque and speed independently, achieving smooth cornering and adaptive traction. This innovation merges the precision of electromagnetic gearing with the flexibility of electronic control - a leap toward lighter, smarter mobility.

Our approach reimagines vehicle power transmission by replacing the traditional driveshaft with a clean, electromagnetic system. Instead of mechanical linkages, the IC engine generates electricity through an alternator, which flows via three phase cables to rear mounted motors. This innovation - designed in collaboration with Copilot - highlights how smart electrical coupling can deliver smoother performance, reduce maintenance, and open the door to scalable, next generation mobility solutions.

 

 

Option 2 - Intelligent magnetic synchronization.

In this option, the rear wheel speed is controlled independently from the speeds of the left and right front wheels.
An input signal is fed by a magnetic disk running along with two front wheels independently. During the curvature, the signals issued by the two front wheels will be different. Then a proportional signal is emitted from the input electromagnetic coils housed in the caliper with the pemanent magnets on electromagnetic disk attached to the particular front wheel. By dynamically energizing coils, each rear wheel motor adjusts torque and speed independently, achieving smooth cornering and adaptive traction. This innovation merges the precision of electromagnetic gearing with the flexibility of electronic control - a leap toward lighter, smarter mobility. Hence, this electromagnetic differential system replaces heavy mechanical linkages with intelligent magnetic synchronization.

This exposed plan shows how Option 2 leverages electromagnetic synchronization to intelligently manage wheel speeds, replacing traditional mechanical differentials with a lighter, more flexible system.

This electromagnetic gear system having an intelligent differential setup, where the rear wheel speed is controlled independently from the left and right front wheels. In this system magnetic disks are mounted similar to disk brakes on both front wheels and they sense rotation by feeding proportional inputs to the coils, allowing each rear wheel motor to dynamically adjust torque and speed. The Adaptive Control Rear wheel motors adjust torque and speed separately on rear wheels, maintaining synchronization between front and rear systems.

This system replaces the heavy mechanical differential with electromagnetic intelligence. A central disk encoder generates rotation signals, which our control unit processes to calculate speed and cornering dynamics. Each rear wheel motor then adjusts independently, synchronizing through magnetic fields rather than gears. The result is lighter, programmable, and adaptive - a breakthrough that merges the precision of electromagnetic gearing with the flexibility of electronic control.

Our electromagnetic differential system replaces heavy mechanical linkages with intelligent magnetic synchronization. By dynamically energizing coils, each wheel motor adjusts torque and speed independently, achieving smooth cornering and adaptive traction. This innovation merges the precision of electromagnetic gearing with the flexibility of electronic control - a leap toward lighter, smarter mobility.

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