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Author Topic: Magnetic Pivot Drive Motor  (Read 1615 times)

Lunkster

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Magnetic Pivot Drive Motor
« on: April 05, 2022, 12:01:28 AM »
Magnetic Pivot Drive Motor

Magnetic Pivot Drive Motor:
The way the Pivot Drive Motor works is that it redirects some of the torque produced in the motor movement.  There is torque that is developed in two places. The first one is in the permanent magnets that are mounted in the larger housing mounting plate.  The second is into the electromagnet that is at the end of the hammer arm.  As the torque is produced into the electromagnet it swings the electromagnet into the opposite direction that it would normally be directed without the arm.  The arm swings the electromagnet that is mounted in the hammer arm over to the other side of the housing mounting plate.  Some of the torque in the arm pushes on the pivot pin, but most of the torque is absorbed into the housing permanent mounting plate on the other side of the plate where the push came from in the first place.  The absorbed torque into the mounting plate has the same direction of push on the mounting plate as the permanent magnet pushed on the electromagnet in the first place.  The torque offset caused by the push from the mounting plate on one side of the plate along with the absorption of the movement of the electromagnet in the motor on the other side of the mounting plate causes movement in the same direction in the motor.  The motor movement is only opposed by the smaller torque that is applied to the pivot pin.

With the power from the rare earth magnets and electromagnets, this motor can produce large amount of push compared to the weight of the motor enabling the motor to have great performance.

The bumpers in the motor are a safety precaution in order to prevent damage to both the permanent magnets and the electromagnets of the motor.  The magnetic field of the electromagnet is turned on at just the right time in order to accelerate the swinging arm from one permanent magnet to the other permanent magnet.  As the acceleration occurs, it creates the torque in both the permanent magnet and the electromagnet at the same time.  The torque on the permanent magnet is active on the permanent magnet housing as soon as the power is turned on to the electromagnet.  The torque is generated in the electromagnet at the same time, but the majority of the torque is transferred into angular momentum. This causes the hammer assembly to swing in an arc around the pivot point until the hammer rotates about 120 degrees where the power is turned on to create a stopping force on the electromagnet.  As the majority of generated torque is used to stop the momentum in the arm from hitting the housing assembly.  This force pushes the housing permanent magnet assembly.  The electromagnet comes to a quick stop causing the permanent magnet plate to move in the same direction as the push on the arm in the first place.  Since the power is still on the electromagnet, the arm accelerates to the other side of the housing permanent plate.  So, this is a start of the same process that we have already discussed.  The only difference is that the arm is moving in the opposite direction.

The action at each side of the motor is the same as the arm swings back and forth transferring it torque twice with each swing in order to change the direction of the torque in the arm into the same direction as the permanent magnets mounted into the housing assembly.  The torque pushing on the pivot pin is the only torque that remains to resist the motors movement into the direction of the housing permanent magnet housing.  As the hammer arm swings back and forth quickly, the device will not spin in a circle, but in a straight line like that of a cross country skier.  The straightness of the line can be improved with some of the design options listed later on.

Because the hammer action with the correct power switching in the motor does not allow the hammer arm to make physical contact with the permanent magnet housing, the torque is spread out over a longer period of time in the motor which will cause a much lower vibration level in the motor than if physical pounding was allowed to occur in the motor assembly.

The weight on the hammer arm allows the arm and permanent magnet plate to produce more torque in the motor as it both accelerates the hammer arm and brakes (slows down to a stop) the hammer arm in the motor.  More torque produces more movement in the motor.  There is a limit according to the strength of the magnets in the motor assembly.  More weight in the hammer arm means you can produce a motor with the same speed with slower arm speeds.  Slower arm speeds reduces the physical torques of parts on the hammer arm assembly from breaking apart.

There are different ways to change the timing of power to the electromagnet as it comes into the stopping position with the permanent magnet.  Also, for the time the power is on to accelerate the electromagnet away from the permanent magnet.  The drawing does not show how the motor start up occurs, but there are many ways to make this happen.   Some of these design improvements could be physical changes to the design and some could be electrical changes or some of them could be software changes in the system design.

The speed of the motor can be adjusted as simply as changing the voltage going to the electromagnet.  Many other power and control circuits can be designed for this new motor technology.

Since the electromagnet moves fast, cooling of it could easily be done by allowing airflow in the motor.

The power of this motor when properly designed can easily have a lot more torque in creating movement in the motor than the weight of the motor when using the rare earth magnets that are available today.  This means vertical lift would be possible along with other directions.  The advantages of this type of motor movement are endless.  By placing these motors in different places with different torque directions in vehicles of all types could totally change the way we travel today. 

If two motors are stacked on each other, they can be designed to be mounted in the same plain and direction.  Then the movements can be designed so that when the first motor is starting its acceleration from the right side of the motor, the acceleration in the second motor is coming from the left side of the motor.  This would smoothen out the vibration in the device it is operating.  Even better yet, if two more motors are stacked in the same plain and direction, then the third motor can be one half way across from moving from left to right of the first motor.  The fourth motor can be one half way across from moving from right to left of the first motor.  This would make the vibration even smaller.  With a fast enough motor speed of the four motors, along with the fact that no actual parts hit each other in the operation of the motors, the operation should be pretty smooth.
 
Since the movement of this motor used in a vehicle is not dependent on the surface it is moving on, the vehicle will not have as many environmental conditions to prevent it from providing superior performance over current vehicles.

What are your thoughts about this motor?

Lunkster
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Lunkster

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Re: Magnetic Pivot Drive Motor
« Reply #1 on: April 26, 2022, 05:19:41 PM »
Magnetic Pivot Drive Motor
 
I added a drawing that shows the torque offset and how it works in this design concept.
Please evaluate and give me feedback on this concept.
 
The Magnetic Pivot Drive Motor Creates an offset of torque direction through the swinging electromagnet on a pivot arm. 
The torque that is created from the permanent magnets is obvious as they push on the electromagnet pushing the motor assembly toward the top of the drawing.  Since the motor can be mounted in any direction in the final product, it makes this motor very versatile.

The torque coming from the electromagnet is a little harder to understand as far as the direction and distribution of the torque on the motor assembly.   The reason for this is because the torque is transferred two times with each swing of the electromagnet.  The electromagnet also has two different swings.  It has a right swing and a left swing. 

Let’s look at the EM left swing first.  We will start with the Electromagnet when it is almost touching the PM on the right side of the PM mounting plate.  The electromagnet is energized at this point.  There are two torques at this point in the motor assembly.  The right-side PM pushes on the EM at the same time the EM pushes on the PM as the hammer arm starting to accelerate in its rotation from its current position to the other side of the motor.  These torques not only make the mounting plate to move, but the hammer arm to move at the same time.  The movement in the EM is a conversion of torque into the kinetic energy to swing the hammer arm from the right side to the left side of the motor.  When the hammer arm gets close to the left side of the motor assembly then the power is applied to the electromagnet again.  Two things happen at this time.  The PM in the PM mounting plate has a torque that pushes against the incoming EM.  This pushes the PM toward the top of the drawing.  The EM has torque pushing on the PM at the same time as the hammer arm is in the breaking process is occurring.  The kinetic energy in the hammer arm is transferred in the breaking process as the EM comes to a stop.  This stopping action is added torque to move the PM mounting plate toward the top of the drawing.  The PMs in both the acceleration and breaking process are pushing the motor in the same direction.  All the torques discussed so far in the system all push the motor in the same direction thanks to the two energy conversions that occur with each swing of the hammer arm of the motor assembly.

Now let’s look at the forces that oppose the direction of motor movement discussed so far.  As the hammer arm swings from the right side to the left side of the motor assembly, there is some torque that occurs in the pivot pin in the opposite direction as the torque that has happened so far in the motor assembly.   This torque is proportional to the speed of the hammer arm.  The faster the hammer arm swings, the greater the torque will be on the pivot pin.  The torque in the acceleration of the hammer arm in conjunction to the torque of the breaking of the hammer arm affect the speed of the hammer arm.  The ratio of the acceleration and breaking torques in the hammer are in the opposite direction of the pivot pin.  These torques should be the same with different hammer arm speeds.   Now let’s say that the acceleration and breaking torque’s in the hammer arm are the same as the pivot torque, this would mean that the pivot arm torque cancels out the hammer arm acceleration and breaking torque.  The torque in the PMs is the same value as that of the EMs torque because they have the same push against each other.  This would mean that the resulting torque of the motor would be that of the left-side and right-side PM torque in the motor assembly.  Now the PM torque occurs both on the breaking and acceleration process in this motor design.  The torque produced from PMs is many times greater than the weight of the permanent magnets.  The torque is the strongest when the PMs and EM are closest to each other.  So, the reduction in duty cycle of the power to the electromagnet along with the distance between the PMs and EM reduces the average torque in the motor compared to the top potential of torque between two magnets.  Because the strength of magnets are so many times stronger than their weight, this motor should be strong enough to have vertical lift.  It would also be able to carry a payload as well. 

What this kind of power would mean is that the motor would be able to bring objects into space with a great reduction in cost.  When this motor reached space, it could keep accelerating in speed as it was travelling in space.  This motor could keep accelerating in speed in space so fast that it would move faster than the communication signals with earth so that it would take years to receive signals from it.  The signals sent to it would never be able to reach it.  This motor would accelerate space travel only dreamed of in the past. 

Now if this motor could do that, just think of placing them into other vehicles we use today.

Now the motor would operate better if the inside of the motor was at a vacuum in order to eliminate wind resistance.
The first drawings show the motor with bumpers in order to protect the motor from damage to the PMs and EM in the motor.
The first drawing also shows a weight in it that would produce more torque in both the EM and PMs of the motor assembly.  With a weight on the hammer arm means that you can produce the same torque in the motor with lower speeds in the motor.  Slower arm speeds will reduce the mounted parts of the hammer arm from falling off with the G-forces on them at the higher speeds.

Interesting notes:
Vehicles built with these motors would have a series of these motors installed into them so that the vehicle could move is several directions.  Not all of the vehicles would need vertical movement, but the ones that did, would be built different than the vehicles today.  The vehicles today have a strong base with much weaker sides and tops to them.  In the new vehicles with vertical lift would have the strength in the ceiling because this is where the torque on the vehicle is that produces the vertical lift.  With vertical lift, the motors in the vehicle would need to have more torque to lift the vehicle than the force of gravity to pull it down to the ground.  Magnets will attach to a metal ceiling without falling to the ground.  In fact, it takes a lot of force to pull them off from a metal ceiling.  So, the magnetic forces are many times stronger than the force of gravity to pull the magnet back to the earth.  With the most structural strength in the ceiling means the walls and flooring does not need to be as strong as the ceiling.  Most of the equipment will likely be mounted into the ceiling.  I can see two ceilings in these vehicles.  The first top ceiling being the structural ceiling and the second ceiling for the eutectics of the vehicle.

Jay Lunke,   Lunkster
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