Abstract: The fuel price and pollution due to general vehicles in metro cities and urban areas are increasing day by day. To overcome these problems, alternative methods are being developed. The solar assisted bicycle developed is driven by BLDC motor fitted in front axle and is operated by solar energy. Usually, photovoltaic (PV) cells contained in solar panels convert the sun’s energy directly into electric energy. The term “solar bicycle” usually implies that solar energy is used to power all or part of cycle propulsion. Solar vehicles are not sold as practical day-to-day transportation devices at present, but are primarily demonstration vehicles and engineering exercises, often sponsored by government agencies. Solar cars have been developing since the last twenty years and are powered by energy from the sun. Although they are not a practical or economic form of transportation at present, in the future they may play a part in reducing our reliance on burning fossil fuels such as petrol and diesel. Solar energy/Solar panels are playing a major role in the economy today in terms of saving electricity & creating green house or eco-friendly atmosphere. But when it comes to the automobile industry and their quest of powering the huge engines, it is still in the research phase as to how to compete with the fuel efficient vehicles. An electric bicycle, also known as an e-bike, power bike or booster bike, is a bicycle with an integrated electric motor which can be used for propulsion. Many kinds of e-bikes are available worldwide, from e-bikes that only have a small motor to assist the rider"s pedal-power to somewhat more powerful e-bikes which tend closer to moped-style functionality: all, however, retain the ability to be pedaled by the rider and are therefore not electric motorcycles. E-bikes use rechargeable batteries and the lighter varieties can travel up to 25 to 32 km/h (16 to 20 mph), depending on the laws of the country in which they are sold, while the more high-powered varieties can often do in excess of 45 km/h (28 mph). When the E-bike is not in use, the battery get charged using the solar power. The proposed model has been designed in order to overcome few problems associated with previous models. Few problems from previous models are rectified in this prototype and required tests are carried out.
STREAM OF THE INNOVATION:
The proposed design correlates to the field of Electrical, Electronics and Automation Engineering. The main field of this invention is renewable energy in which this invention is related to the concept of solar energy which helps to save the fuel and also its cost. Therefore, this invention is one step ahead of the Green Energy. The proposed invention can be used as a bike or as a cycle.
BACKGROUND OF THE INVENTION:
Electric bicycle are intrinsically cleaner and noise free as compared to their gasoline & diesel powered counterparts, in which no heating and less maintenance needed. There are various kind of bicycles that may be classified into paddle bicycle, motorized bicycle, and electric bicycle. The shortcoming of the bicycle influence individuals to don't prefer to utilized bicycle. To begin with, paddle bicycle requires a lot of vitality to paddle the bicycle. The customer will be exhausted after using the bicycle. Then, will less worthy for students to use to go to the class since hey will be drained when they are in the class and will be their focus while perceiving the speech. Next, motorize bicycle that used fuel as it prime mover. The bicycle which utilizes fuel is expensive. As a student their stipend is constrained and just can be utilized for their studies and for their sustenance to get by at the campus. Besides that, mechanize bicycle will make contamination of terrible gases in our habitat particularly in this period and leads to the global warming
Lastly, electric bicycle that induce by battery can be just adequate for some time. The individual require to discover control supply to energize the battery or else they have to paddle the bicycle that practice more passion contrast with the ordinary bicycle as a result of the load.
PRIOR ART:
The solar based electric bicycle is filled in as a test to get, on bright summer days, the most pedal help as to use the considerable amount of energy generated by solar panel. In prior art, the main problems is that a non-renewable need -acid battery stores only a little parts of the energy contained in an equal weight of gasoline or
diesel fuel. Even though nickel-cadmium and distinctive types of alternate battery to come up with enhanced energy density, limit has not yet moved toward that of gas or diesel fuel and cost might be restrictive. A related issue is that an electric drive system constantly prevents with the usual pedaling and treatment of a bicycle. By enlarging the size of the battery from its basic foundation for example like increases range between recharges, but further hampers pedaling and handling. Speed and slope climbing capacity may likewise be contrarily influenced. Therefore, in this work the size of the battery from some original size has been reduced which affect the speed of the e-bicycle.
In prior art, the amount of exposure changes through the angle at which sunlight falls on panel and the power is always lower than rated. The reason behind this that the solar panels are arranged as flat mounted and not faced to the sun However, the result that the sunlight is scatter, lower down the impact. Also a major fact: Time of the day, because of the sun angle we can only acquire enough power through the solar panels between about 11:00 am to 4:00 pm.
This project provides the flexible solar panel therefore we can change the angle of solar plates as per the intensity of the sunlight. Moreover, we can be removed solar plates easily as per the requirements.
OBJECTIVE OF THE INVENTION:
To overpower the issue and the fault, this venture need to do some exploration and concentrate to grow better innovation. For getting accomplishment there are a few thing that we have to analyze, for example, what will be the prime mover, how to put away it and the benefits of this new vehicle. So for these there are numbers of ideas to be carrying out before to begin the amazing project.
• To expand the environment friendly vehicle which is very low priced and practice the non-conventional source of energy.
• Emerge with the idea of having that type electrical bicycle which reduce the operation of battery when it is not in use .
• To formulate with the incredible idea of having the low speed bicycle for a longer distance.
SUMMARY OF INVENTION:
The perception of the project is giving the comfort to the person who is riding a bicycle and to make use of energy in sustainable manner. The invention comprises of:
• Solar Panel:
It is consists of photovoltaic cells along with the cluster of solar panels arranged in defined manner , an inverter, battery and interconnecting wires. In this project, we are using a 20W solar panel and coupled to a 12V battery which supports in nonstop charging of battery. Array of photovoltaic cells practice photons energy coming from U.V rays of sun to liberate electrical energy, called photovoltaic effect.
• Battery:
In this scheme we are consuming lead acid batteries. There are 4 LA batteries of 12V, 7.5Ah each. Lead acid batteries, designed in 1859 by French physicist Galstron Plante, are virtually common form of solar battery storage. In spite having a low ratio of energy- to- weight and energy to- volume, its capability to contribute in high surge currents which means the high power-to-weight ratio keep by these cells. This give many advantages, along with its less price, beautifully constructed in order to offer the maximum rated current needed by automobile starter motors in motor vehicles .
• DC electric motor:
In order to transform the electrical energy to mechanical energy we are using the electric motor.
• Commutator:
It comprises of distinctive metal contact segments through the rotating cylinder present on the surface of the rotor. Electromagnet windings on the rotor surface are associated with these segments .In the commutator, two or more stationary contacts called "brushes", made of a soft conductor like graphite press against the commutator, creating gliding electrical contact through consecutive segments as the rotor turns, imparting current in the windings.
• Dynamo:
In this project, by using the commutator, the dynamo generates the direct current . Into the solar bicycle, the dynamo has placed at the front
wheel frame with its wheel mounted on the tire. It is used for the purpose of lighting the headlight at one position of DPDT switch and the other position connects the light with battery. The rating of the dynamo is 12V and 6 W.
• Charger:
To make this project, we have used the charger of rating 220V AC,
50Hz, and 1.0A Charger and other following specifications:
INPUT: 180-300 VAC, 47-63 Hz OUTPUT: 29.4 V DC,
2.0 A
FLOAT: 27.4 V DC ± 0.4 V BOOST: 29.4 V DC ±
0.4 V
A switch disposed on the handle bars is manually operable to activate and deactivate the electric motor, as desired, wherein the electric motor engages the rear wheel and drives the bicycle without a user having to pedal the bicycle. A throttle control is also disposed upon the handle bars where the speed of the motor is controllable and the self-charging electric bicycle may be accelerated or deaccelerated as desired.
Therefore it is mainly the most essential aspects of the self-charging electric bicycle in present scenario so that the explained description can easily be acknowledged that follows and the role of this electric bicycle in present times to the art may be better valued .
Aim of the current self-charging electric bicycle, through its different innovative features is remarkable discovery. For better knowledge of the self-charging electric bicycle, its effective features and particular objects accomplished from its uses prefer to the additional drawings and explanations.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
The discovery will be explained in relation to the accompanying drawings, in which:
Figure 1 Illustrates the full view of solar electric bicycle
Figure 2 Illustrates Tab sheet "power required"
Figure 3 Demonstrates a graph of human power competence skills which has
long-lasting impact
Figure 4 Shows the Block diagram for the solar electric bicycle
Figure 5 Explains the complete circuit diagram of the project
DETAILED DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
The invention will now be described in relation to the accompanying drawings, in which: Figure 1 illustrates the full view of solar electric bicycle:
The solar power from the sun has apprehended on solar panels board on the back side of the bicycle. All these plates are attached to a lift converter through which it enhances the voltage to the appreciable level. This assembly is coupled with a battery. This battery is linked through the DC engine. The battery can also be charged utilizing a divider charger if there occurrence of nonappearance of sun. The brushless DC engine has favored here as of no protection and support, high competence, and low clamor and furthermore as a result of the default brushes we don't obtain sparking in a BLDC motor. For the accurate functioning of motor we employ the synchronized motor controller with it. . Likewise, a choke has been used here for raising the speed of the motor. This accelerator is also directly connected to the motor controller which in turn controls the motor speed. If there is deficiency in the solar energy or battery has exhausted then also the bicycle can be run using mechanical pedaling. From the Figure 1, it is clear that it contain movable solar panels on the top of back wheel.
Figure 2 Demonstrate the Tab sheet "power required":
We must recognize that the power is essential for various conditions, as example climbing hills. Therefore in the Excel sheet / tab sheet "Power required" the power which is very necessary is calculated and strategized in a speed-power graph. The bicycle constraints can be tested by us. At the time of making the solar bike, the Factors which are responsible for it is not well known and predictable. Pulling of the air is the most vital factor. We are implicit that orientation area in solar bike is in-between that of a racing bicycle and an upright bike, i.e. 0.5m2. The overall weight of 90 kg is for a solar bike of 18 kg, a rider of 70 kg and some luggage of 2 kg. Figure 3 illustrates a graph of the long term human power capability:
The curve points sharply point that the sensitivity of human to increase in power demands. That is why to meet the demand a motor power of only 100W is helpful. Figure 4 illustrates Block diagram for the solar electric bicycle:
The energy coming from sun which aided the bicycle comprise of various components- hub motor, solar panel, voltage regulator, lead acid battery, motor controller, accelerator, bicycle.
Hub Motor
The hub engine is a DC engine which is conservative in nature. The rotor which is placed in the stator externally along with the permanent magnets which is fixed in the inner side . Stator of hub motor is displayed and secured on the top of the axle in addition the centre part of the hub has made to move in circular motion through A.C currents delivered by the batteries. High torque produced by the hub at low speed, which is highly effective and not required, the sprockets, brackets and drive chains. It means they are very consistent and having a long lifespan. The key characteristic of Brushless DC Machines is they can easily be operated to impart constant power speed ranges. Solar Cells/ Panels
The photovoltaic cell is one of the electrical device which is used to covert the sun energy into electrical energy , so according to the title bicycle has run by solar energy and we need the solar cell to convert the sun energy with the help of photo voltaic effect with the help of this solar cell the lead acid battery is charged when exposed to solar power .The photovoltaic effect includes the purpose of converting a voltage into an electro-magnetic radiation. The photoelectric and photovoltaic effects are correlated with sunlight, but unlike in that electrons are cast out from a material's surface when come in contact to radiation of sufficient energy in photoelectric, and liberate electrons for building up of the voltage in between the 2 electrodes, the electrons moved to diverse bands of valence to conduct in the material. The top surface of Solar cells are electrically connected and constructed like a module with a sheet of glass to permit light to pass and protect the semiconductor from the weather. In order to attain a anticipated peak DC voltage we will add solar cells in series, and for peak current, the solar cells are positioned in parallel position. Voltage Regulator
It is mandatory to regulating the voltage output from the solar panel before it is distributed to the battery. The most promising electronic and electrical device which converts the power of having the dc voltage output higher than the input dc voltage is called the Voltage Regulator .To make the voltage at prescribed range it is also required to adjust the input voltage up to the higher and controlled level. The output of the solar panel is always fluctuating due to faults and imbalance due to
variable power and angular directions as well as other environmental factors. This is the voltage regulator/Boost Converter comes into SAB. The input for the boost converter is linked with the output from the solar panel, which then become output for the battery required for its charging. So to withstand with the constant deviations or fluctuations in the output of the solar panel, we have required a voltage regulator/boost converter who will take an input from a varied range of voltages and give the output at appropriate value. The boost converter has been designed to convert the power that will take the constant DC voltage and give the high voltage output in steady and reliable manner. Our voltage regulator/boost converter requires output of the solar panel, which can range from OV to 27.2V, and also for the charging of the battery. Lead Acid Battery
Basically the batteries having the good efficiency like Lead acid batteries are best suitable batteries for solar panel. Even if it is lower in energy density than lithium metal, lead acid is harmless and offered firm precautions during charging and discharging. This posses numerous advantages over other traditional types of batteries. For the solar bicycle the Lead acid battery is the first and finest choice .The quantity of Current of its unit Ampere received from battery implies the energy flow through the system of battery .One of the basic condition is that more the current flow faster the battery will release . For this project and to overcome the above condition we choose the high capacity lead acid battery packed in designed which is only made for vehicles. The internal components of the battery have been closed in the plastic but stiffed casing so that there will be no leaking of ions . Motor Controller
Basic and chief part of the overall system is the motor controller. To control the amount of power supply and to propel the BLDC hub motor is the basic function of motor controller. To transform the DC voltage into an alternating voltage having changing amplitude and frequency can be done with the help of this controller .This amplitude and frequency initiate the hub motor at dissimilar speeds. On the whole the motor comprises with the number of electronic equipment like MOSFET transistors and small microprocessor in order to sense somewhat failures grouped with the motor hall sensors, the throttle, to make shield against disproportionate current and voltage, which are perfect for defending the system. Accelerator/Throttle
30 km/h is the highest speed of a paddle bike and we need to vary the speed which depends on the situations of road & traffic. That's why an accelerator is needed compulsory. Regulator makes the motor move from zero to rated speed. The
throttle is equipped on right side of the handle bar and linked to the controller. The conversion of DC voltage to an alternating voltage having different amplitude and range of frequency that moves the hub engine in variable speed is taking place with the help of the accelerator. It is made up of MOSFET transistors and a small microprocessor. This type of accelerator is technically stated as a Hall Effect type. It is comprised of three wires colour of black, red, and green. Red colour and black colour wire denotes -The supply voltage which is usually 4V and lastly the Green wire depicts the voltage which is rises when the regulator / accelerator is at ON stage . Figure 5 illustrates the overall circuit diagram of the project:
The basic working of this solar bicycle lies in the fact of making use of either solar panel or mains supply at a time to charge the DC batteries mounted on the carrier and utilizing the energy to drive the BLDC hub motor (Fig. 6) assembled in the front wheel. The combination of controller and accelerator helps in power delivery and speed regulation respectively of the motor. The bicycle is also provided with head and tail lights, horn, ignition switch and DPDT switch. The head light can be operated either through battery or through dynamo assembled on the front wheel. The horn connection is made with battery and ignition switch is mounted to switch the motor ON or OFF. Once the batteries are fully charged and capable of delivering nearly about 45V-48V then the motor can be started by the ignition switch and bicycle functions. Figure 6 illustrates the circuit diagram of dynamo position in solar electric bicycle:
The dynamo has placed at the front wheel frame with its wheel mounted on the tire. It is used for the purpose of lighting the headlight at one position of DPDT switch and the other position connects the light with battery. The rating of the dynamo is 12V and 6 W.
Figure 7 illustrates the top view of the solar panel attached in the rear side of the solar electric bicycle:
Top view of the solar plates and battery is shown in this figure. Dimension of the solar plate is 21 inches x 15.5 inches and the dimension of the battery is 11 inches x 6.5 inches. The total solar capacity is 20W x 2 and the battery rating is 7.5Ahx4/12Vx4.
We claim:-
1. An electric bicycle comprising:
a back plate (housing for the battery) disposed overlying the rear wheel;
a battery disposed on the back plate;
a moveable solar panel connected through the back plate in both side;
an electric motor disposed on the front wheel;
a first dynamo in operational communication with the front wheel;
2. The electric bicycle of claim 1 further comprising a throttle control disposed upon
the handlebars wherein the speed of the motor is controllable between a minimum
speed and a maximum speed.
4. The electric bicycle of claim 2 wherein further comprising a dynamo wherein movement of the front wheel generates a voltage.
5. The electric bicycle of claim 1 further comprising a moving connector between solar panel and back plate which helps to move the solar panel up and down as per the sun light demand.
| # | Name | Date |
|---|---|---|
| 1 | 201811017402-STATEMENT OF UNDERTAKING (FORM 3) [09-05-2018(online)].pdf | 2018-05-09 |
| 2 | 201811017402-PROVISIONAL SPECIFICATION [09-05-2018(online)].pdf | 2018-05-09 |
| 3 | 201811017402-PROOF OF RIGHT [09-05-2018(online)].pdf | 2018-05-09 |
| 4 | 201811017402-FORM 1 [09-05-2018(online)].pdf | 2018-05-09 |
| 5 | 201811017402-DECLARATION OF INVENTORSHIP (FORM 5) [09-05-2018(online)].pdf | 2018-05-09 |
| 6 | 201811017402-COMPLETE SPECIFICATION [10-04-2019(online)].pdf | 2019-04-10 |
| 7 | 201811017402-FORM-9 [17-04-2019(online)].pdf | 2019-04-17 |