Analysis and Development of Multiphase Induction Motor Drives for Electric Vehicle Applications

G, Vishnu Vardhan Reddy and K, Siva Kumar (2018) Analysis and Development of Multiphase Induction Motor Drives for Electric Vehicle Applications. Masters thesis, Indian Institute of Technology Hyderabad.

Text
Thesis_Mtech_EE_4142.pdf - Submitted Version
Restricted to Repository staff only until August 2022.
Download (2MB) | Request a copy

Abstract

In the present century, transportation is one of the key factor for the country advancement. Especially, in urban transportation Gasoline powered vehicles (GPV) are the major sources of environmental pollution, global warming by emitting the hazardous gasses. Fast urbanization leads to fast extraction of gasoline resources as well as harming the ecosystem. Because of these reasons, there is a necessity to find alternative in place of the gasoline resources. For replacing the GPV’s, the roots of Electrical vehicles (EV) developed in 1880’s. EV’s are not popular in those days because of the lack in advancement of transmission and distribution networks, storage systems and charging stations. As compared with 19th and 20th century, the EV are gaining the attention because of advancement in power electronics, battery storage and fast charging technologies. The major advantages of the EV’s as compared with GPV’s are emission free transportation, less maintenance and high reliability. Vehicle motion depends on how much tractive force is applying at driving wheels as the main power source; motor is one of the most important parts in electric vehicles. From few decades back, DC motors were commonly used in electric transportation. However, with the advancement of power electronic devices and converters, the permanent magnet synchronous motor (PMSM), brushless DC motor (BLDCM), switched reluctance motor (SRM) and Induction motor (IM) are more widely applied recently. However poor efficiency of electric motors in complete torque speed zone, lead to the more energy consumption of the motor with single speed transmission. Alternate solution for this is operate the motor in better efficiency zone and accommodate multi speed ratio gearbox between motor and driving wheels. Nevertheless overheating, oil leakages, excessive noise and derivability issues are the major problems with mechanical gearbox. To avoid the problems associated with mechanical gearbox it is better to replace the gearbox with an electronically commutated device. In this regard Pole Phase Modulated Multiphase Induction Motors (PPMIM) are best suited for gear box less vehicle transportation in which motor can capable to produce multiple torque speed without compromising the performance parameters of the vehicle with multi ratio gearbox. Even though the concept multi-phase induction motors for variable frequency, drive applications proposed a bit earlier. Due to low cost availability of power electronic switches, high fault tolerance capability and enhanced torque speed characteristics multi-phase induction motors are becoming more popular for electric vehicle (EV) applications. The work carried out here mainly aims the designing the specifications of a pole-phase modulated induction motor drives (PPMIM), by considering the all-opposing forces acting the vehicle. With the help of vehicle dynamic equations, the required torque and power ratings of the machine are calculated to attain the maximum vehicle speed of 150 km/h. In order to achieve the design requirements the optimal design calculations of the three-speed and five-speed PPMIM’s are presented to achieve this rated speed and toque requirements. The performance parameters of these 3-speed and 5-speed PPMMIM driven vehicles with the help of MATLAB simulation. A similar kind of simulation study carried out for IC engine based vehicles to compare the performance characteristics of PPMIM driven electric vehicle. In addition to design specifications in the present work, a static optimization method proposed to shift poles and phases of the PPMIM in order to obtain better energy utilization of the vehicle. Simulation results reveal that the relative energy consumption improvement reached up to 6% by shifting the poles and phases of the PPMIM optimally.

[error in script]

IITH Creators: