EV With Onboard Auxiliary Charging Mechanism
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Transcript of EV With Onboard Auxiliary Charging Mechanism
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Electric Vehicle With On Board
Auxiliary Charging Mechanism
Tarun Kundu
Saurabh Kapoor
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Need for Electric Vehicle (EV)
Petroleum consumption has steadily increased while
domestic production has continued to decline
World oil production predicted to peak within the next 5-12
years Recent increase in gasoline price is indicator of growing
tension between supply and demand
Compared to conventional internal combustion automobiles
Electric cars have a significant reduction of urban air
pollution as they do not emit harmful tailpipe pollutants from
the onboard source of power at the point of operation.
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Contd.
Another advantage of electric motors is their ability to
provide power at almost any engine speed. Whereas only
20 percent of the energy in a gas car converts to actual,
useable energy, 75 percent or more of the energy from a
battery reaches the wheels.
Significantly less dependence on foreign oil, to power the
economy.
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INTRODUCTION
Electric cars are a variety of Electric Vehicle (EV);
the term "electric vehicle" refers to any vehicle
that uses electric motors for propulsion.
Promoting the use of electric vehicles (EVs) is a key element inmany countries initiatives to transition to a low carbon
Economy.
Recent years have seen rapid innovation within the automotive
industry , with designs such as plug-in hybrid vehicles.
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Our Project
EVs, which have both an electric motor and an internal
combustion engine) and range-extended electric vehicles
(which have an electric motor and an on-board generator
driven by an internal combustion engine) promising to
overcome consumers fear that vehicle will run out of
electricity in the middle of nowhere.
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COMPARISON
Plug-in EVs
Running range is limited
Put strain on local electricity
distribution networks
Quickly discharged
Onboard Charged EVs
Not limited
No such effect on local
electricity distribution
Discharging and charging
takes place simultaneously
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WORKING
Vehicle consists of:
1.Brushless D.C. motor
2.Sealed Lead Acid (Maintenance Free) Battery3.Generator
4.DC Drive
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BRUSHLESS DC MOTOR
The brushless DC motor is the combination of a permanent
excited synchronous motor and a frequency inverter. The
inverter has to replace the commutator of a conventional
DC motor. Fig. show how a brushless DC motor can be
derived from a mechanically commutated DC motor with
three armature slots. Its armature winding corresponds to
a three phase winding in delta connection. The
commutator acts like a three phase frequency converter.
Stator (excitation) and rotor (armature) change places.
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Principle of a permanent magnet excited DC
motor: construction
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BATTERY
Electric vehicle batteries differ from starting, lighting, and
ignition (SLI) batteries because they are designed to give
power over sustained periods of time. Deep cycle batteries
are used instead of SLI batteries for these applications.
Traction batteries must be designed with a high ampere-hour
capacity. Batteries for electric vehicles are characterized by
their relatively high power-to-weight ratio, energy to weight
ratio and energy density; smaller, lighter batteries reduce theweight of the vehicle and improve its performance. Compared
to liquid fuels, all current battery technologies have much
lower specific energy; and this often impacts the maximum
all-electric range of the vehicles.
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GENERATOR
In electricity generation, an electric generator is a device thatconverts mechanical energy to electrical energy. A generatorforces electric charge (usually carried by electrons) to flowthrough an external electrical circuit.
An engine-generatoris the combination of an electricalgenerator and an engine (prime mover) mounted together toform a single piece of self-contained equipment. The enginesused are usually piston engines, but gas turbines can also beused. Many different versions are available - ranging from
very small portable petrol powered sets to large turbineinstallations. .
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DC DRIVE
Adjustable speed drive (ASD) or variable-speeddrive (VSD) describes equipment used to control thespeed of machinery.
DC drives are DC motor speed control systems. Sincethe speed of a DC motor is directly proportional toarmature voltage and inversely proportional tomotor flux (which is a function of field current),either armature voltage or field current can be usedto control speed. The electric motor article alsodescribes electronic speed controls used withvarious types of DC motors
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SPECIFICATIONS
Range/Autonomy : Up to 45 km/charge
Top Speed : 50 Kmph
Weight : 80 Kg (Without Genset and Batteries)
Motor : 1500 Watt 48 Volt, BLDC Motor.
Batteries : 4 x 12V Sealed Lead Acid Maintenance Free Battery
Voltage : 48 V
Charger : Self contained onboard charger
DC Drive Pulse Width Modulation (PWM) type
Brakes: Front & Rear hand brakes.
Wheels : Spoked Wheels.
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Contd.
Generator :
Output: 750 VA
Dry Weight: 28 Kg
Consumption : .7 litre/hour
Continuous Operating Time : 9 hours
Estimated Time to Recharge: 3 hours
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THAN
K YOU