Features of the Keppe Motor
Economy and efficiency
The same motor can be used in a vast range of products: As the Keppe Motor’s efficiency is constant over its working range, the same motor can be used with different products requiring different loads. For example, our 1/2 HP laboratory prototype provides more than 90% efficiency whether running at 1W or 400W (useful power). Heat loss is minimal and the motor can be considered a "cold-running" motor, even at a maximum nonstop working regime.
Unparalleled versatility: The Keppe Motor offers unique versatility because the same motor design can replace many different types of conventional motors. For example, the same motor employed in a fan can be applied to a mixer or a toy. Normally you’ll find induction motors in fans, universal motors with brushes used in mixers and Continuous Current motors employed in toys.
Better Output Power to Volume ratio: This means the Keppe Motor can be used in products that are powered by batteries and/or solar panels, like the large lawnmowers used to cut grass in public squares, gardens, and road sides.
Easy speed adjustment: The motor can adjust the speed with pulse variation without loosing it’s efficiency (resonance).
It works under any speed with a virtually constant efficiency curve: The Keppe Motor keeps its high efficiency it its whole working range, from maximum design load and/or speed from minimum load and/or speed near zero.
Negligible consumption when working in Stand-By (without load): This is an optimal situation for applications in which the motor is not required for work, but cannot be turned off. Ideal also for regimes with intermittent and/or variable load.
A motor that works through resonance: Invented in order to work in accordance with a physics law that guarantees maximum efficiency to the system: resonance. Under that state, a physical system offers maximum amplitude (greater mechanical work) with the minimum quantity of energy entering in it. In a motor, the amplitude is translated in terms of torque and rotation (output power), and feeding energy in terms of power consumed from the grid (input power). The ratio between output and input powers indicates motor’s efficiency.
It doesn’t have any iron-silicon nucleus: The motor doesn’t have losses through hysteresis. Besides that, it means a great manufacturing advantage, because it avoids plate cuts, maintenance of cutting machines, etc.
A cool running motor: Can be manufactured with less heat-resistant materials, which increases substantially the range of optional plastics and diminishes costs.
It can be encapsulated: With a low power (1/3 HP) and high efficiency motor, losses by heath are negligible. So, the motor can be completely encapsulated for a very wide range of applications in severe environments with particulates in big quantities, corrosive chemical environments, sea air, or even splashes of water or different liquids compromising motor’s durability.
Better Output Power / Volume ratio: This enables the use of this motor in products that would be fed by batteries and/or solar panels, as for instance lawnmowers for public squares, gardens, and along roads.
It enables new products and the portability of different equipment: KM’s speed is not connected to power grid’s frequency, which simplifies a lot the use of systems requiring high speed applications, besides guaranteeing high efficiency, which is impossible for these systems of conventional technology. Climatizers using high speed rotating discs (approximately 14,000 rpm) powered by two-pole induction motors coupled to speed amplifiers are an example of that. These systems are big and heavy, and can only be coupled in the front of big fans. Additionally, a system with a two-pole single-phase motor and speed amplification is a killer of energy efficiency.
More durable: Keppe Motor’s high efficiency, combined with the absence of iron core stator coils and a continuous supply of current that’s lower than equivalent conventional motors, guarantee longer motor life.
The best option for distant regions: In certain regions in Brazil (and around the world), the power grid is unstable, and voltages often vary greatly during the day. Sometimes, with grid voltages of around only 80/ 90V, minimum expectations are not even met. The Keppe Motor can be easily tailored to work in these situations just like it works at 110 or 220V – and at the same efficiency.
More autonomy: Batteries and cells have a guaranteed longer life.
Thinner wires: As the Keppe Motor is a high efficiency motor, there is less current required and the motor doesn’t need thick gauge wires. This makes it more economical – especially if employed as auxiliary motors in the automotive, nautical or aviation sectors.
Speed independent from the number of poles: The number of poles indicates the working torque available, and as the KM varies its speed only through voltage, motors with little or several poles can equally function under any speed.
It functions with different essential materials: Magnets (ferrite, Neodymium, alnico, Samarium-Cobalt, etc.) and Copper or Aluminum coiling.
Endless configurations are possible: Keppe Motor’s principle enables projects of
1) bipolar, multi-pole or matrix rotors and stators,
2) rotors and stators with axial or mixed magnetic flow radial,
3) with serial coils, coils in parallel or mixed,
4) with simple, bifilar or multifilar coils,
5) with open or confined field spiral and aspiral coils, etc.
An Universal Motor: As the power required by the Keppe Motor is less in order to accomplish the same work, and its rotation doesn’t depend on the power grid, the circuit is simplified and cheaper in case of dual voltage products, or those needing to work under 110 / 220V, 50 / 60Hz.
A Modular Motor: It can be coupled to other Keppe Motors in order to increase power without losing efficiency.
Multifunctional Circuit: It disposes of variable, dual voltage speed control and rotation inversion. It only requires a rectifier bridge and a filter capacitor with a sensor for automatic switching, which is controlled by the very motor in order to reach its resonance point, which automatically corresponds to the point of greater efficiency for a given load. Speed variation can happen:
1) through a simple variation of AC voltage at circuits entry,
2) through a PWM circuit after rectification and filtering, or
3) through a variation in resonance pulse width.
It Functions with AC or DC: The circuit can be designed in order to function with it's current coming both from the alternate power grid as well as from batteries.
It significantly reduces the cost of systems with photovoltaic cells: If we focus our attention in low power motors, we will verify that they correspond to more than 80% of motors used in home appliances. If we think of moving them with photovoltaic panels, the cost would be prohibitive, as a mini 20W panel costs approximately R$ 400, without counting on the converter system and batteries. If we take the example of a standard ceiling fan that consumes around 130W, we would need 6 20W panels, which would cost R$ 2,400. With the Keppe Motor, the same fan would consume 24W, which means that a 30W plate would be enough, i.e., the cost would fall from R$ 2,400 to R$ 600!
Unparalleled Versatility: Keppe Motor’s versatility is unique, because it allows the same motor to substitute conventional motors of different types. For example, the same Keppe Motor from a fan can be used in a mixer or a toy. Normally, one uses 1) an induction motor for fans, 2) a universal motor with brushes for mixers, and 3) a Continuous Current motor for toys.