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Bert Harju the inventor 1942-2022


Bert Harju with the Harju motor, Finalist in Environmental Innovation 2009

Quick information about the invention

Some important connections for Electric generator/Electric motor technology.

The synchronous speed consists of: The number of poles and the input frequency 50 Hz this gives the speed. This means that this rule governs the manufacturing process for standard types.

Series for the idle speed of today's asynchronous motors at different speeds/min: 3000, 1500, 750, 375, 187.5. The number of poles: 2, 4, 6, 8, 10

The increase of a pair of poles means that: the size, the weight, the manufacturing price becomes in parity with the number of poles.

This is particularly noticeable in larger products where size and weight are of great importance the total function of a plant.

In today's standard products is the stator fixedly mounted in the outer casing which means that the rotor is the part that rotates as well transmits the electrical pulses emitted from the stator during operation.

What occurs during the operating ratio with load on the output shaft, will be that the rotor speed will vary which means that the magnetic transmission between stator/rotor will also vary, this means that the magnetic energy produced from the stator does not fully come to be transferred due to the speed variations during the work phase, this in turn gives rise for heat generation in the stator/rotor. Which in turn reduces the output power. Corresponding functions also include the electric generator technology in the standard version.

New important connections regarding the Harju Electric Generator/Electric Motor technologies.

The innovation briefly meant the following: Through a mechanical converter of the rotation regarding both the stator/rotor functions with the same standard components, the rotation speed/2 is obtained, which means:

Applicable Electricity Generator: at 50% of the speed, the same output power is obtained as the standard has at its synchronous speed, (the synchronous speed has decreased by 50%), At the same speed as by default, the output power is doubled. This is made possible by the converter doing the same work as a pole pair in the generator.

The current electric motor is obtained in the same way 50% of the synchronous speed, which means the following: Electric motors synchronous speeds occur in the same way which gives an extra pole pair function, which lowers the speed by 50%. but at the same time the torque increases by twice as much standard in the same size. Because it input the 50Hz frequency to the stator for one revolution in the standard version, this means that the rotor receives double the frequency/revolution which explains the power increase from the electric motor.

The magnetic pulses produced by the innovation's rotary transducers come from the stator to the rotor always output synchronously to each other this 2 times/revolution, which means that the previous variations depending on load as well as network variations completely absent, heat decreases, energy transfer increases.

The input the electrical energy of the electric motor increases only by about 3% for this work effort, this depends of the energy conversion being performed between the stator/rotor inside the motor by the same supplied energy. Adjusting the rotor in the working position of the stator, we carry out the assembly, there measurement takes place of the output power.

Overall, the same output power is obtained from the electric motor corresponding to twice the physical size as standard.

This means lower cost, smaller size/weight. External control of the speed is not required.

The innovation also enables both the electricity generator and the electric motor to speed is steplessly controlled, from 0 to the synchronous speed, this with minimal losses, as the rotating energy is transferred between the stator respectively, rotor depending on whether it is generator or electric motor function that applies.

The regulation thus takes place internally between the stator/rotor functions.

Henceforth, the new technology will be called: H-electric generator respective H-electric motor. (H stands for Harju technology)

Information about Harju Electric motor technology

Formula for calculating the speed of an electric motor; n=2x50x60/2 = 3,000 rpm.

In the case of HIGHER frequencies 60 Hz. n=2x60x60/2 = 3,600 rpm. (+ 20%) + forces 20%. Each increase in speed by 10Hz increases motor power by 20% according to the formula.

The stator winding is wound on an H-electric motor as standard for the same speed as today's electric motors 2800 rpm.

The innovation means that the stator and rotor rotate towards through a transfer device each other absolutely synchronously. In this way, the double peripheral speed is obtained as well double the number of electrical pulses/revolution, thus 50% of the rotational revolution 1400 rpm is obtained because double magnetic pulses are obtained below the rotation.

Today's electric motor technology with solid states provide an uncontrolled transmission of the magnetic pulses between stator rotors depending on whether the transmission takes place with varying load and variations of the supply current from the mains during operation. This in turn means that generated magnetic energy from the stator does not completely transfer to the rotor, which in turn provides increased heat development in the stator's iron package.

Innovation enables higher energy transferred between stator and rotor, minor heat losses as well, this transfer of the magnetic force occurs with maximum power, depending on the adjustment of the transmission is performed by setting the gears for the best position during assembly, which occurs 2 times/rotation speed for all poles, this adjustment is not changed during continued operation of the electric motor.

The energy gain obtained corresponds to the energy that the transmitter requires for its work.

The innovation means that double energy is extracted at 1400 rpm. this WITHOUT the supplied supply energy increasing significantly by (2-3%).

The basis for the new technology is that the added 50Hz the frequency of the stator, through against the rotation gives the rotor 2x50Hz rotational speed which thus quite naturally the engine's torque increases by about 100% at 1400 rpm.

Thus the result is:

A. Increased torque on motor shaft.

B. Halved speed.

C. Possibility to halve the physical size without to reduce motor power, thus weight and manufacturing costs can also be reduced which has a certain interest in the market. D. An additional advantage will be when the motor shall be used with a lower speed than the synchronous speed 1400 rpm and a controller is switched on so that adjustment can be performed, this means that motor power decreases by about 15%/100 rpm reduction through losses due to that the motor decreases power by decreasing the speed against the synchronous speed that the motor is designed for. This is a common major problem that has not been resolved today.

E. Because the H-electric motor has a higher power at its synchronous speed (1400 Rpm) and thus can allow the load to occur at a lower speed WITHOUT the same losses being obtained, our motor will solve most of today's similar load situations in a more efficient way for the user.

F. The innovation means that the H-electric motor produces double electric pulses between the stator/rotor WITHOUT the number of poles increasing physically in number by 100%, which gives weight, price, easier manufacturing etc. as a result.

G. The innovation means that the H-motor synchronous speeds lie at 1500 rpm current, 50 Hz connection. About higher speeds If desired, a gear unit is fitted to the electric motor as before. However, it is more common to lower speeds than today's synchronous speeds 3000 Hz are usually relevant. It should be noted that regardless of the speed at which the H-electric motor operates, the dual torque is obtained at standard motors, furthermore the maximum magnetic power transmission between stator/rotor is always obtained, regardless of whether the motor is loaded or the incoming drive current varies, this depends on the transfer between stator/rotor always takes place synchronously, can not be changed during operation.

H. Additional benefits are obtained by the pivot mass under the engine rotation is increased by about 3 times towards today's electric motor, which means that the torque is maintained better, with smoother running than is the case with day technology.

The new electric motor can be manufactured in the same sizes/designs as today's electric motors varying brands today market in their markets, manufactured/assembled in similar factories like today, etc. The H-electric motor is a good replacement for power and space prioritized for good functioning.

Information about the Harju Generator

Today's Elgenerator technology works with a fixed stator and free rotating rotor, which means that the electricity generating pulses from the stator do not have a maximum transmission of these electrical pulses. In addition, electricity generation will vary the speed is continuous.

The innovation means that the stator and rotor rotate towards exposed to each other from the outer casing, this makes it possible to precisely control the transmission of magnetic force between the rotor and the stator.

This is done by a transmission gear converts the rotation to exactly opposite rotation between them as in addition, is adjustable, to measure it during the final assembly of the generator most efficient position between rotor/stator which increases the power and not least they decrease transmission losses that occur when the poles during the standard function work with stationary stator and rotor rotating at high speed past each other.

As is well known, the resistance of the electric winding increases when it is heated, which in turn decreases machine output. The possible load that the gear unit makes up is effectively replaced with the benefits of adjusting the magnetic transmission between the poles.

The innovation can be compared to mounting double the number of poles on the same unit, which means that the generator reduces the speed by 50% and increases the input power by about 100%. In addition in addition, the diameter increases significantly and the weight and cost increase.

The innovation means that the diameter increases by about 30 mm, and the weight by 0.5 kg corresponding size. The input power increases in the same way by 100% at 50% of the speed for the same output power.

The benefit of the innovation is that the speed will be lower as well the adaptation to the driving unit, means that the gearbox gear ratio can be reduced by 50% which results in weight and cost reduction.

About the driving unit operated at the same speed as standard, the output power increases by 100% from the generator.

An additional advantage is that electricity generation starts much earlier at rotation which results in more generated current pulses/unit of time which means improved profits even in lower winds regarding wind power. The generator can be built in different sizes and adapted for their tasks.

- Bert Harju

The improved inventions of Bert Harju


Electric motor

This new electric motor and its companion the electric generator has double the output thanks to counter rotating stators and rotors in the same size as an ordinary electric motor or electric generator. Or the same output in half of the size of as an ordinary electric motor or electric generator.

At Chalmers, Göteborg. A test to compare the drive energy for the new electrical generator versus a standard generator was made. The test showed that the new electrical generator used only 1643.5 Watts input energy compared with the standard generator that used 2629.6 Watts input energy for the same output. It means that with a standard electrical motor. The new electrical generator used 986 Watts less input energy than compared with a standard electrical generator for the same output.

Bert Ivan Harju - Motor-or a Generator-Related Arrangement US 7,786,634

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