Brushless DC electric motor

Question 3: a) What is the main use of stepper motors? In essence, stepper motors are applied in motion-control positioning system. For instance in 3D printers, disk drives, intelligent lighting, scanners, CNC machines, printers, camera lenses, plotters and slot machines. b) What are the similarities and differences between a reluctance, a permanent magnet and hybrid stepper motors? The three motors are similar in that, they all have power electronic control that comes with electronic…

CHAPTER 1 INTRODUCTION A butterfly valve is a valve which can be used for regulating flow. A butterfly valve is a flow control device that has a varied applications in the field of piping industries and firefighting applications. Not only it is simple in design but also has low cost, fast closing and opening times, and it is generally favored as they give low head loss in the fully opened position. Butterfly valves are as shown in Fig. 1.1, 1.2 and 1.3. The butterfly valve consists of a disc…

is very important to control the speed of induction motors in industrial and engineering applications. Efficient control strategies are used for reducing operation cost too.This paper presents a direct flux and torque control of three phase induction motor drive using PI and Fuzzy logic controller. The Direct Flux and Torque Control (DTC) is one of the most excellent direct control strategies of stator flux and torque ripple of Induction Motor Drive(IMD). The conventional method of DTC uses PI…

1.1 Overview Electric motors are the majority of the industry prime movers. Induction motor is the most popular ones for their reliability and simplicity of construction .although induction motors are reliable they are subjected to some mode of failures. These failures may be inherent to the machine itself or due to operating conditions. The origins of inherent failures are due to mechanical or electrical forces acting in the machine enclosure. Researchers have studied a variety of machine…

Power wheelchairs have two main modules: the base (formed by the batteries, the controller, the wheels and the motors) and the seating system. The wheels configuration will have a direct effect on the wheelchair’s performance in different situations. As we have two types of wheels (drive wheels and castors), depending on how they are positioned and how the weight is distributed, they will be more or less efficient in different situations, environments, terrains, etc. The first critical…

CHAPTER1 INTRODUCTION TO ZVT 1.1 What is ZVT? Zero voltage switching can best be defined as conventional square wave power conversion during the switch’s on-time with “resonant” switching transitions. For the most part, it can be considered as square wave power utilizing a constant off-time control which varies the conversion frequency, or on-time to maintain regulation of the output voltage. For a given unit of time, this method is similar to fixed frequency conversion which uses an adjustable…

What is power train? In context to automobile engineering, the term power train is explained as the integral component that generates power and delivers it to the road surface, water, or air. It consists of engine, differentials, transmission, drive shafts, and the final drive. In a simple language, it is defined as “A train which comprises of gears and shaft for transmitting power from an engine.” Or “An assembly of gears and associated parts by which power is transmitted from an engine to a…

Michelin Pilot Sport 3 The Pilot Sport 3 tyre from MICHELIN is a high speed tyre, optimised for precise steering and stability to enhance the driving experience. Designed for sports-oriented high performance with maximum energy efficiency, this dynamic tyre combines fuel savings with high mileage and excellent grip in all weather conditions. The Michelin Pilot Sport 3 is suitable for all sports vehicles, roadsters and higher powered saloons. • Dynamic response enhances driving pleasure • Anti…

Fig. 3. Schematic Diagram of Power Line Guardians (“PLG”) PLGs are also used to give the real-time data on the lines such as: line current, conductor temperature, frequency, sag [17]-[21]. Fig. 4. The PLG communications system. The diagram (Fig.4) shows the PLG communications system. PLGs (blue) control the power flows on the lines. Super PLGs (red) can control both the power flows and the PLGs. These Super PLGs are also used to communicate with Energy Management Systems (EMS) and allow…

Not every innovative idea is capable of surviving the initial stages of inception. In order to ensure success, innovators must scrutinize concepts for their benefit, not only to the organization, but also to the consumer. From conception to planning, and production to marketing, ideas must stand up to multiple tests and criteria. One such way of measuring the merit of an idea is by using the NOMMAR method, which evaluates customer need, technological options, potential market, business model,…