The Similarities between pulse motor and electric levitation traction concept

The concept of pulse motor and electric levitation traction are two different concepts that their contributions in the modern world cannot be over-emphasized. Although they are different, they still have some unique features which are common among both.

This article gives an insight into the similarities between pulse motor and electric levitation traction concepts. Carefully read through!

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Pulse Motor Concept

A pulsed rocket motor is usually defined as a multiple pulse solid-fuel rocket motor. This design overcomes the limitation of solid propellant motors being unable to be easily packed up and reignited. 

The motor is burned in segments (or pulses) until the completion of that segment with the help of a rocket motor.

Subsequent segments (or pulse) are often ignited on command by either an onboard algorithm or during a pre-planned phase. All the segments are contained during a single rocket motor case as against staged rocket motors.

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The pulsed rocket motor is formed by pouring each segment of propellant separately. Between each segment may be a barrier that forestalls the opposite segments from burning until ignited. 

At the ignition of a second pulse, the burning of the propellant destroys the barrier.

The advantage of the heartbeat rocket motor is that by the command ignition of the next pulses, near-optimal energy management of the propellant burn is often accomplished.

All the pulses have a special thrust level, burn time, and achieved specific impulse. These impulses count on the sort of propellant used, its burn rate, its grain design, and therefore the current nozzle throat diameter.

Note, unlike A/C or D/C types, pulse motor uses quick pulses of current to drive the motor. This short pulse makes it spin. It's usually extremely hefty, operating as a flywheel, and contains many permanent magnets evenly distributed around its periphery. 

These magnets are often powerful and can be arranged in a variety of different combinations. The example of the figure on the right depicts all the magnets pointing radially outward.

Note, with this system which is rare, it generates electricity without the use of any common external sources.

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How Does Pulse Motor Works

A Pulse motor system makes an available signal generator for generating polyphase rectangular with different phases depending on the speed of command pulses and control circuits. 

During the process, when the command pulse speed is low, the control circuits receive poly-phase trapezoid stimulating signals to drive the pulse motor.

On the flip side, it supplied the rectangular signals to the control circuits to drive the pulse motor when the command pulse speed is on the high region.

Another vital fact about Pulse Motor is that it can make up a high accuracy servo-system that has open loops. 

Further, as pulses drive the pulse motor, the driving torque at high speeds becomes insufficient, because inductances of the exciting coils deteriorate the rising time of the exciting current.

Electric Levitation Traction Concept

Magnetic levitation is a way of suspending an object in the air using only magnetic fields as support. 

The fields are employed to reverse or oppose gravity and any other counter accelerations. 

Maglev technology as it’s also called has the potential to generate minimal friction, efficient, and far-fetched technologies. 

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Typically, the theory of magnetic levitation has been known for over a century, thanks to the work of American scientists Robert Goddard and Emile Bachelet conceived frictionless trains. 

In other words, electric levitation traction is a train transportation technology that uses two sets of magnets: one set to resist and push the train up off the track, and another set to navigate the elevated train ahead, taking advantage of the lack of friction.

Along certain "medium-range" routes (usually 320 to 640 km [200 to 400 mi]), maglev can compete favorably with high-speed rail and airplanes.

With maglev technology, there's only one moving part: the train itself. The train travels along a guideway of magnets which control the train's stability and speed. Propulsion and levitation require no moving parts. 

This is often in stark contrast to electric multiple units which will have several dozen parts per bogie. 

Electric levitation traction trains are therefore quieter and smoother than conventional trains and have the potential for much higher speeds.

Electric levitation traction train has many upsides which include, its high starting torque, cheap maintenance cost, and high speed. Even with the many upsides, it has disadvantages which are its shortcomings. 

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These shortcomings include its High capital cost, supply failure problem, and requirement of additional equipment which are to be used for achieving electric braking and control.

It is expedient to note that, though magnetically levitated trains have captured most of the world's attention, maglev technology is not restricted to rail travel. It can work in different fields of engineering such as chemical engineering, civil engineering, military engineering, and biomedical engineering just to mention a few.

Having understood the two concepts and how they work, let’s delve into their similarities.

Similarities between Pulse Motor and Electric Levitation Traction Concept

To start with, both are energy generators that can be used as efficient technologies in various industry settings in any part of the world. Another common factor is that they both are cheap to maintain. Furthermore, both have metal coils that are designed to produce a magnetic field or electrical resistance. These coils are used to generate a magnetic field in an electro-magnetic machine, typically a rotating electrical machine such as a motor or generator.