(8) EE8353 Question Bank Electrical Drives and Controls. Advantages of electrical brakes They are quick There is almost zero maintenance cost Its operation is smooth Disadvantages of electrical brakes They only work while vehicle is moving. It does not use any spark plug to ignite the mixture. The tricycle has the advantage of being fitted with an adjustable frame. Manually operated valves require someone in attendance to adjust them using a direct or geared mechanism attached to the valve stem. This is not possible in mechanical braking. Explain the plugging method of braking. Therefore Plugging is most inefficient method of Braking. (b) The presence of air inside the tubings ruins the whole system. In plugging the power supply given to the dc motor is made to reconnect so that it tends to drive the motor in the opposite direction. Plug-In Hybrid Advantages. Advantages of Hybrid Cars. The easier it is for a car to move, the less energy the engine needs to push the car through the air. Polestar 3 Revealed, Production Starts in 2023. 5. 3.Plugging Or Reverse Current Braking. In this process of braking, the kinetic energy of the rotating parts is dissipated in the form of heat by the brake shoes of the brake lining that rubs on a wheel of vehicle or brake drum. #5 - Braking Helps Recharge Battery. #4 - Good Resale Value. Plugging applied to DC Shunt motors as shown in Fig. (c) Maintenance is more than other braking systems. Hybrids vs. Plug-in Hybrids: Pros and Cons. May Be Less Effective at Lower Speeds Traveling at slower speeds means your vehicle has less kinetic energy and requires less braking force. Hybrid cars are environmentally friendlier than conventional gas engine cars and have lower emissions , We . With excellent fuel economy and a variety of incentives, plug-in hybrids can be well worth the money. Question: Conclusion: 1. List the probable causes if the armature dos notable release after the magnetic starter is de - energized . This is the simplest type of braking method. By using electic braking the capacity of the system ( like higher speeds, heavy loads) can be increased. Disadvantages of Mechanical Braking. A small leak in the hydraulic pipeline will be fatal to the transfer of power. Regenerative . discuss the advantages and disadvantages of each approach. No unsafe gas release and environment-friendly. For rheoststic braking, draw the braking period and the maximum value of braking current as a function of the resistance and discuss the graph. * Advantages: 1. The braking force must be capable of being controlled. The ability to detect defects in multi-layer structures (up to about 14 layers), without interference from the planar interfaces. 18. Despite such non-advantages, the system is used in conjunction with electric braking to ensure the reliable operation of the drive. #3 - Financial Incentives. Answer (1 of 8): ABS stands for Anti-lock braking system. (8) EV BRAKING. Braking power is wasted in the form of heat. It permits for conventional brakes based on friction. Advantages and disadvantages of press brake machine. It offers a different feel to the driver. When in disc braking, the brake pads press the disc, in drum versions they expand slightly to slow down the drum and, accordingly, the wheel. Concept of working of CI engine with its application Advantages and disadvantages of this engine. Dynamic Braking. Advantages and Disadvantages of Regenerative Braking The advantages include the following. 2023 . Plugging Braking of Induction Motor Convenience of having both back-up gas and . In electric braking there is no maintenance cost like replaced brake shoes periodically. 2. The battery pack gets its charge courtesy of regenerative braking and power from the gas engine. This is particularly the case for the third harmonic, which causes a sharp increase in the zero sequence current, and therefore increases the current in the neutral conductor. 2. Designing a car with good aerodynamics positively enhances its ability to accelerate resulting in better fuel economy. Plugging braking of induction motor is done by interchanging connections of any two phases of stator with respect of supply terminals. The most flexible one is called a Full Plug-in architecture, which is used in eclipse. It means if we have to park vehicle on a road which has a slope than we have to use mechanical brake. Plug-in hybrids have a battery pack and electric motor(s), but also a gas engine. . Advantages of EV. Passenger cars, light truck, motorcycles and large stationary engines are fitted with this system. Explain the Speed-Torque characteristics of three phase induction motor. 2. Power-operated actuators, using air pressure, hydraulic pressure, or electricity, allow a valve to be adjusted remotely or allow rapid operation of large valves. 6. Mechanical braking. Like anything else, regenerative braking has its drawbacks. #2 - Lighter Vehicle. 4. engine generator or regenerative braking . Meet the MegaBronc, a Ford Bronco/F-250 Mash-Up. 2. Author: delfi. During the plugging operation very high I²R losses occur in the form of heat.This heat is more than produced when rotor is normally locked. Braking should be simple, robust and easy to operate. In mechanical braking, all the braking energy is lost in the form of heat energy. ADVANTAGES AND DISADVANTAGES OF ELECTRIC DRIVE OVER OTHER DRIVES: ADVANTAGES: 1. list its advantages & disadvantages?? Why must the field winding left connected across the supply during the braking period? The function of the air compressor is to build up and maintain air pressure required to operate air brakes and air-powered accessories. Greatly reduce the possibility of brake lock up. It cannot be charged from an electric outlet. 5 ELECTRIC TRACTION-III: Mechanics of train movement. Below are the advantages and disadvantages of hybrid cars that you have to know. It needs excessive maintenance. Electric braking is smooth and jerks less. 3. Table of Contents. 6.1 Plugging or Counter current Braking: . With a neat sketch explain its working. discuss the advantages and disadvantages of each approach. Regenerative braking. 2. Vehicles that are powered by gas are major contributors to the build up of greenhouse gases, which stay in the earth's atmosphere. There is always slip. Answer (1 of 7): Cylindrical roller bearings has rolling element completely differs from ball bearings;they are in cylindrical shape which ultimately carries higher radial load compares to ball bearings with the same size. The electric system is clean . Fire Tubes: Cochran boiler has multi-tubular fire tubes. We will also summarise if going electric will indeed be a feasible solution for the imminent depletion of fossil fuels. , Managing Editor - November 18, 2021. 6. When DC current is applied to the motor windings, it creates a fixed (rather than rotating) magnetic field. Provide better chance of steering. Plug Braking. The electric motor's engine gets its boost from the gasoline engine and through regenerative braking. The hot flue gases from the combustion chamber travels to the smokebox through these fire tubes. 3. Durability: Electric motors contain few moving parts and they operate smoothly which increase their life-spans. 3. Read below article about Regenerative Braking. Another drawback to plugging is that it can induce high mechanical shock loads on the motor and connected equipment, due to the abrupt stop that it causes. There are two main types of electric brakes: magnetic and friction. 2: Rheostatic braking of shunt motors. (ii).Discuss any one method of electrical braking of DC Machines. Braking is achieved by equipment called a brake. From lower emissions to better gas mileage, you can rest assured you'll be reducing your carbon footprint by making the switch. * Advantages: 1. However, it has some disadvantages like quick wearing of pads. What are the advantages and disadvantages of the plugging braking? If you regularly . arrow_forward. This is accomplished through the use of multiplex wiring, which enables the . 1. Different braking methods employed in the dc motor are listed below. 2. Greatly reduce the possibility of brake lock up. And this is one of the advantages of dynamic Braking: It applies to direct current motors, synchronous motors, and induction motors. Advantages of owning a hybrid vehicle. Plug-In Hybrids. 1. arrow_forward. Electric motors experience losses due to hysteresis and . As a result, the regenerative braking system is fed less energy and does not supply the battery pack with much charge. This is the simplest type of braking method. The plug-in hybrid vehicle. . Advantages of Having a Hybrid Car. 1. Fig. Benefits of Electric Vehicles [17] All types of electric vehicles not only boost the vehicle's efficiency, they also have major environmental benefits. In this system a 6 volt or 12 volt battery used to produce spark. Effects of Harmonics: One of the major effects of power system harmonics is to increase the current in the system. Braking is a technique to reduce the speed of the motor. High and accurate torque, long life, unaffected by power supply, safe and easy to use. Disadvantages of Plugging Highly inefficient- Heat loss in the armature and the external resistance It produces a high mechanical impact load on the motor and connected equipment Application of plugging The plugging creates more stress on electrical and mechanical components, but it provides a faster stop than dynamic braking methods. The only disadvantage of this type of braking is that the motor has to run at super synchronous speed which may damage the motor mechanically and electrically, but regenerative braking can be done at sub synchronous speed if the variable frequency source is available. In case of overloading, it can disengage from driver by automatically draining the oil filled by blowing of fusible plug; The maximum torque can be adjusted by varying the amount of oil filled in the casing. Different braking methods employed in the dc motor are listed below. These cars do not contain an exhaust system at all, which means they aren't creating emissions like other cars. Regenerative Braking. Electric braking. Able to detect defects of 0.5mm in length under favourable conditions. (c) Maintenance is more than other braking systems. As long as the wind blows, electricity will be generated. #2 Hybrid Electric Vehicle 1. The main disadvantage of this method is that regenerated power and supply power is wasted in the resistance. The advantages and disadvantages are This is a much-used method where en electric motor is worked as a generator once it is detached from the power source In this braking, the energy which is stored will dissipate through the resistance of braking & other components used in the circuit. 6.3 Regenerative Braking: In this method, the mechanical energy is converted into electrical energy. (b) The presence of air inside the tubings ruins the whole system. 16. Image credit: KB Electronics, Inc. . 2. Top 5 Disdvantages of Hybrid Cars. ie repeated quick application of brake be possible without needing any relaxation. Disadvantages of the hydraulic braking system are as follows, (a) The whole braking system fails due to leakage of fluid from brake linings. Give the types of braking used for DC Motors. This engines gives higher efficiency compare to SI engines. In this process of braking, the kinetic energy of the rotating parts is dissipated in the form of heat by the brake shoes of the brake lining that rubs on a wheel of vehicle or brake drum. In simple the motor windings are connected in reverse direction of the rotation of . Air compressor. Advantages of cylindrical roller bearings. Advantages: 1. Low initial cost: If compared with fossil-fuel engines with equal horsepower rating, electric motors have very low initial cost. Special features of traction motor, methods of electric braking-plugging rheostatic brak ing and regenerative braking. It is used to build-up and maintain air pressure. Compared with the drum brake, the disc brake is simple in structure and easy to repair. 2. There will also be a slight performance overhead in communication between plug-ins. Provide better chance of steering. Disadvantages. Mechanical braking. The Advantages of Electric Cars: 1. Answer (1 of 8): ABS stands for Anti-lock braking system. Compared to standard gas vehicles, hybrid versions of the same car model offer many "green" benefits. Electrical braking is. Most functional braking is achieved using electrical braking, which is made possible by the addition of a variable speed drive system (e.g., variable frequency drive system). In this method, the power supply connections of the motor are reversed so that it tends to drive the motor in opposite direction and eventually comes to rest where supply is cut off. Quick,Less heat produced as compared to the plugging method. Mechanical braking. The disadvantage is that to be really flexible you have to develop a solid framework that incorporates loading, unloading and communication between plugins. Electrical braking is dependent on magnetic flux and motor torque direction theory. It allows the vehicle to maintain steering control when braking in slippery conditions by preventing the wheels from locking up. Hybrid car is defined as a vehicle which has an engine that can switch between the fossil fuel & alternate fuel source , It runs on the combination of gas and electricity, The gasoline engines used in the hybrid cars are small , light and highly efficient .. A valve actuator is the mechanism for opening and closing a valve. The most well known early model car, the Model T . Drum brake system has own advantages like simplicity of the design, but drum brakes are more overheating than disc brakes. Electric . A plug-in hybrid vehicle includes a combustion engine as well as an electric motor (Hunter, 2014). Braking action is produced by the rotor working to align to this stationary field. Most BEVs have a regenerative braking system that captures energy and restores it to the battery when you stop. It extends the battery charge. Plugging. What is meant by Regenerative braking in DC Motor?