Microcontroller based Governor MEG-601 uses state-of-the-art technology, for controlling Diesel Engine of Diesel Electric Locomotives. This is a maintenance free alternative to the hydraulic Woodward Governors popularly used for this application. The Governor consists of a Control Unit mounted in the Driver cab, and an Actuator Unit mounted on the Engine. The Actuator Unit can be mounted exactly on the same Engine base as Woodward Governors. The Governor controls the engine speed, based on throttle handle position (popularly known as notch) selected by the Driver on the Driver Desk. Engine RPM is measured from a Tachogenerator or speed sensor mounted on the Engine. Digital PID control is used to calculate desired fuel rack position dynamically, based on the selected notch on throttle handle and measured Engine RPM. A Stepper motor drive is used in the Actuator Unit to control the fuel rack of Diesel Engine. The Governor also controls load on the engine electrically, so as to limit horsepower at each notch to a preset level, through an electrical interface with the excitation system of Locomotive. Booster (Turbo) air pressure is measured through a pressure sensor mounted in the air manifold. Movement of fuel rack is limited as a function of this pressure so as to prevent incomplete combustion of fuel, black smoke, excessive engine temperature, fuel wastage etc caused by lack of air to burn the fuel. Lube oil pressure is continuously monitored and Engine is shutdown if the lube oil pressure is less than the specified pressure at each notch position. This protects the Engine from damage due to malfunction of lube oil pump etc.
Medha Servo Drives Pvt. Ltd., founded in 1984, is focused on rail transportation. Since inception, Medha has used Research and Development as a tool for success and today we are proud to be known for our product range, domain knowledge, design expertise, quality and manufacturing capabilities. Starting from humble beginning, over the last 25 years our company has grown to employ over 1100 talented people whose commitment has led to a sales revenue of INR 1.7 billion (approximately USD 34 million), with the revenues growing at the rate of 88% year over year for the past three years. Medha¿s vision is to become a world leader in railway products and to achieve this we specialise in three areas, Control Electronics, Power Electronics and safety critical Signalling.
We have designed and manufactured various world-class high-tech electronics products for application on locomotives, coaches, railway stations and yards. We specialise in designing and engineering our products to withstand shock and vibration, wide temperature variations, and electrical disturbances that are typical of harsh locomotive environment. Our strength lies in designing, customising and integrating systems that involve multiple functional domains such as control electronics, power electronics, fail safety and mechanical construction. Medha¿s Design Centre is 250 people strong and has all the infrastructure required for developing sophisticated products. Medha has also achieved CMMI Level 3 certification for well defined design processes for new product development. We are currently working towards CMMI Level 5 certification by further improving our design processes.
At Medha, our products, our people and our approach to business are held to only the highest standards. We build quality into our products by following well designed processes and implementing end-to-end manufacturing. We profoundly believe in professional management at all levels and strictly follow Quality Assurance System as per ISO 9001:2000 standard. Medha was awarded ISO 9001:2000 certificate by American Quality Assessors accredited by ANAB and established a reputation for quality products and excellent after sales service. Since our foundation, our quality policy has been, ¿To provide products meeting customer satisfaction with excellence in performance and cost effectiveness through a continually improving Quality Management System¿.
Medha¿s motto being ¿translating technology into innovative solutions¿, our employees believe in making our customers¿ lives better by designing better products and improving existing products. To us, the idea of innovation extends beyond building a product. We continue to train our customers and service the product throughout the design life of a product (typically 10 ¿ 20 years).
Medha¿s Corporate Office, Manufacturing Unit and Design Centre located in three different areas are built over a combined area of about 13 acres of land in the heart of industrial areas near Hyderabad, India. These state-of-the-art facilities encompass the capability to design, develop, manufacture, service and provide in-field product support.
In 2007, Medha started a charitable institution by the name of ¿Medha Charitable Trust¿ for the upliftment of poor students. It is the goal of the trust to improve the lives of these students by supporting them throughout their education and helping them become self sufficient in the long run. The trust has touched the lives of more than 94,000 students in various schools within the first two years of its establishment.
P-4/5b, I. D. A, Nacharam
Hyderabad - 500076, Telangana, India
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