The document describes a 3-phase inverter with speed control that can be used to power electric cars. It consists of a 4x4 matrix keyboard, microcontroller, PWM module, IGBT inverter circuit, battery, and 3-phase induction motor. The microcontroller converts the input speed value to frequency control signals, the PWM module generates gate pulses for the IGBT inverter, which converts DC power from the battery to 3-phase AC to run the motor at the set speed. This provides an efficient way to control speed and replace costly BLDC motors in electric cars.

1. 3 PHASE INVERTER WITH SPEED
CONTROL FOR ELECTRIC CARS
PRESENTED BY,
MATHEW JOSEPH
VIPIN THOMAS
RENJU MATHEW
AKHILA ANS THAMPI

2. INTRODUCTION
• Electric cars are having a wide range of opportunity over petrol/diesel
vehicles.
• Electric cars are a more environmentally-friendly option than
traditional cars.
• The main parts in an electric car are,
A rechargeable battery
Controller
Electric motor.

3. .• Battery - Power.
• Controller - Converts the current from DC-AC
• Motor - Converts electrical energy to mechanical energy.
• we are planning to do a 3phase inverter with 3 phase induction motor
speed control which can be broadly use in electric cars.
• Which can easily convert the DC power from the battery to AC power
• we can adjust or vary the frequency of the AC power in order to
control the speed of the 3-phase induction motor.

4. MAJOR COMPONENTS
1.4*4 matrix keyboard : To enter frequency/speed value.
2.Microcontroller : 8051 or PIC 16F877A, used as the
controller.
3. PWM module: PWM switching module for generating
switching pulses.
4. IGBT inverter module : Gives inverted output.
5. Battery : Supply DC power.
6. Motor : 3 phase induction motor, used as engine.

5. 4*4 matrix keyboard
P W M Module
IGBT Inverter Circuit
Motor
Battery
PIC 16F877A
PIC 16F877A
Micr ocont r ol l er
BLOCK SCHEMATIC

6. SIMPLE WORKING
• we are giving input speed value through 4*4 matrix keyboard.
• Microcontroller converts it into corresponding frequency control
signals
• PWM module generates gate pulses for the IGBT according to the
signal obtained
from microcontroller.
• IGBT conducts when the gate is triggered, its converts the DC power
from battery to
corresponding 3 Phase AC current.
• The 3 phase ac current runs the induction motor, the speed of the

7. MAJOR APPLICATIONS
IN ELECTRIC CARS: we can replace the more costly, bulky BLDC motor
by the more efficient and less costly 3 phase induction motors .
As like the electric cars we can use this inverter module in driving
mechanisms used in industrial applications where 3 phase supply is not
available.
Using this we can use 3 phase motors with 1 phase supply by simply
adding this module, we can covert 1 phase supply to dc then to 3phase
power with motor speed control.

8. .