Prototype

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Tidbits for small tricycle prototype at the Ateneo de Manil University
Dr Sherdon Uy and Mang Cally with their DYNAMOMETER
Generating a Sinusoidal 3-phase Variable Frequency, Variable Voltage Inverter
Transformers for 240-volt Squirrel-Cage Induction Motor
Is Technology "transplant" Acceptable?
Why not run an irrigation pump from batteries, like running a 3-phase shop drill?
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Small Tricycle Prototype Tidbits at the Ateneo de Manila University

First 3-Phase Ride on the Ground
Source: Sulfuric Acid Sealed Batteries
Driven: 2-kilowatt 3-phase Squirrel-Cage Induction Motor
DC Voltage: 84 volts
Switching spikes: >1,000 volts with suppression
AC Voltage: 240 volts
Transformers primary: 84 volts with center-tap
Transformers secondary: peak voltage at 339 volts
AC Characteristic: Sinusoidal Variable Frequency, Variable Voltage, Variable Controlled Limiting Current
Output Semiconductors: IGBT (insulated gate bipolar transistors)
Mother Board: TTL (transistor-transistor logic), OpAmp (operational amplifiers), diodes, and many more components

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Dr Sherdon Uy and Mang Cally with the DYNAMOMETER that they made.

It was designed to measure the efficiency of the engine at different loads varied by the hanging weights.

The weights apply normal pressure to the friction drum attached to the shaft of the engine. This will give the torque provided by the shaft. A tachometer will measure the RPM. These two values will yield the so-called "brake horsepower."

The fuel tank will be filled. To measure the fuel consumed within a specified time, they will stop the engine, and refill the fuel tank. The amount of fuel to fill the tank will be recorded.

They will be able to give the "actual" value of the "specific fuel consumption" in a volume or weight units per horsepower-hour.

How do we produce a "sinusoidal 3-phase variable frequency, variable voltage" Inverter?

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3-Phase Inverter Circuit
A - reference wave form generated by the motherboard that dictates what the voltage and frequency should be
B and C - Wave forms of B and C are added to produce the output voltage D.
D is the reference of "Actuators" that provide the voltage and current as specified by the motherboard.
Thus, the motherboard can serve any application, be it for high or low power equipment.
This is for the prototype tricycle. There is no boundary for jeepneys, mini-buses, or buses, or manufacturing equipment. The output power components will provide the power to drive the electrric motor.
Like any power plant, the DC source provides the power that is needed by the load.
The "catch" is simple. The engine that supplies the charge to the battery will always operate at high efficiency.
Power plants that supply power through lines will be operating at lower efficiencies since it will be operating at lower loads.

Now the question is: "What drives the 3-phase, 60-Hz, squirrel-cage induction motor?"

The prototype uses transformers to step up the 3-phase power to the operating voltage of the induction motor. One would say that this is an inefficient configuration. And that comment is absolutely true. Beyond the prototype, the motor should be driven directly from the battery, through a control switching system, of course.

Now the answer to the question.

We start with a battery and have a DC power supply
You could have any voltage you want

In our case, we decided upon 84 volts for the prototype, so that we do not unnecessarily expose ourselves to electrocution, i.e., death!
Now generate a square wave that will go from 0 to 84 volts, stay there for 1 millisecond, then go from 84 to 0 and stay there also for 1 millisecond
Connect a 10k resistor to the square wave that is generated and connect the other terminal of the resistor to a 1 micro-farad capacitor and measure the voltage on the capacitor
You will see the voltage to be half of 84, or 42 volts
Make the square wave stay at 84 and when the voltage on the capacitor hits 62, bring the voltage down to 0
When the voltage on the capacitor hits 58, switch the resistor back to 84 volts
When the voltage on the capacitor hits 64, bring the voltage back down to 0
When the voltage reaches 60 volts, switch it back up
The first set point is 60 +/- 2 volts, the second is 62 +/- 2 volts
Make this set point follow a reference sine wave in time and the average voltage at the capacitor will approach a sine wave
Call this phase A
Build another set-up like this and make it lag 120 degrees from phase A, and you have phase B
Build a third set-up and make it lag 240 degrees from phase A, and you have phase C
NOW, you have built a 3-phase inverter, i.e., converting Direct Current to Alternating current

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Is a Technology "transplant" acceptable?

Is it such a good idea to transplant the technology of the Ateneo de Manila University to the tricycle?

YES, of course!

If it runs in AtenEco eCar vehicle, it will run in ANY tricycle carrying AtenEco's Planet-Friendly technology.

This is a tricycle taken at a town in Surigao, Philippines. It is a small clip from the YouTube channel of Aileen Kalev.

Tricycles in Tawi-Tawi, an ideal location for the Project. Make them Electric Vehicles and/or Hybrid-Electric Vehicles.

https://outoftownblog.com/tawi-tawi-ultimate-travel-guide/#:~:text=Information%20and%20Tips-,Security,%2DTawi's%20island%2Dhopping%20exploration.

Why not run an Irrigation Pump from the Batteries?

In addition to the "3-Phase Shop Drill Driven by Inverter," There is no doubt that the system can replace that diesel engine driving a Village irrigation water pump.

The system will not be as heavy as that diesel engine, and with the noise level, one could sleep beside it while waiting for the irrigation requirements to be completed.

People of the Community could watch an outside movie screen and not be disturbed by the soft sound of the pump and its prime mover, which is an electric motor driven by battery and an inverter to supply the 3-phase power.