2 edition of microprocessor controlled GTO chopper for DC traction drives. found in the catalog.
microprocessor controlled GTO chopper for DC traction drives.
Thesis (M.Phil.) - Brunel University.
|Contributions||Brunel University. Department of Electrical Engineering and Electronics.|
|The Physical Object|
|Number of Pages||94|
Electric Traction Electric Drives Jean-Marc Allenbach –1 DC-Motor: chopper control On an inductive load, a pulsed voltage ud may be applied by a swich CS. The mean value of voltage ub at load is the product of duty ration and supply voltage ulc. A diode Dr diteFile Size: KB. DC CHOPPERS A chopper is a particular kind of static device which is adept in converting fixed dc voltage to variable dc voltage. Earlier ac link choppers were used for converting fixed dc to variable dc but those were bulky and inefficient as they involved multi step conversion. But with the introduction of dc choppers things have Size: 2MB.
The past three years has seen the main influx of microprocessor based equipment the vital traction control field. British Rail now have the clas 91 and locomotives/multiple units with processor driven thyristor DC drives and the second-generation push-pull equipment in service, and the three-phase drive under development with the. An on-load tap changer is used to select the voltage for the speed control of DC traction motors. A four stroke reciprocating type air motor is presently used to drive the tap changer.
Koyama M, Yano M, Kamiyama I, Yanos S () Microprocessor-based vector control system for induction motor drives with rotor time constant identification function, IEEE Trans. Ind. Appl., 22(3), – Google ScholarCited by: 1. "Matlab/Simulink in Drives and Power electronics" – Practice 4: DC Motor Chopper Control 10/10 In the second simulation model () are introduced: a current limitation loop between the PID controller and the PWML generator - a model for a AC/DC converter to supply the chopper. Note the 10 resistor allowing the Ω.
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DC Traction using Semiconductor Chopper Controlled DC Motors: Chopper control has replaced resistance control in all dc traction schemes, such as V dc main line and suburban traction, V dc underground traction and electric buses.
The chopper control has following additional advantages over the resistance control. FLYWHEEL = CLUTCH(C) BATTERY MOTOR i1 / \ v CVT 1. LOAD| / 1 PD v ^ Fig. 2 - Schematic Diagram of the Drive System A Microprocessor-controlled DC Traction Drive P microprocessor controlled GTO chopper for DC traction drives.
book = + p A SC d v 3 ± (Mgv)h (1) where Pr, denotes the power required at the wheels to overcome the rolling resistance, aerodynamic losses and the : O. Cerid, A. Denker. Once the steady-state condition is reached, the power requirement of the load is uniquely known (Burrows, ) IFLYjEELI CLUTCH(C) 'i CONTROLL ER f' Fig.
2 -Schematic Diagram of the Drive System A Microprocessor-controlled DC Traction Drive + O.5PASCdV 3 ± (Mgv)h (1) where Pwdenotes the power required at the wheels to Author: Ö. Cerid, A. Denker. Chopper Fed DC Drives: The variable voltage to the armature of a dc motor for speed control can be obtained from a dc chopper which is a single stage dc to dc conversion device.
The voltage variation at the load terminals can be obtained by using either current limit control or time ratio control. • GTO based chopper are also used chopper can be controlled by setting maximum and minimum level of current. D G Padhan PSD Dr. D G Padhan PSD Types of choppers Chopper fed DC drive Four-quadrant Chopper + V a Q1 Q2 Q3 Q4 D1 D3 D2 D4 + V dc.
Chopper Control of Separately Excited DC Motor The chopper converts the fixed DC voltage to variable DC voltage. Self-commutated devices (directly on or off devices via gate) like MOSFET, IGBT, power transistors, GTO and IGCT are used for making choppers because they can be commutated by low power control signal and do not need commutation circuit.
SimPowerSystem, One quadrant chopper DC drive.  Chinnaiyan V. Kumar, Jerome Joritha, Karpagam, J. Mohammed, Design and Implementation of High Power DC-DC converter and speed control of dc motor using TMSFDSP, Proceedings of India International Conference on Power Electronics, chopper is also known as dc‐to‐dc converter.
The thyristorconverter offers greater efficiency, faster response, lower maintenance, smaller size and smooth control. Choppers are widely used in trolley cars, battery operated vehicles, traction motor control, control of large number of dc File Size: KB. layout of DC drive mechanism is obtained. The designing of current and speed controller is carried out.
The optimization of speed controller is done using modulus hugging approach, in order to get stable and fast control of DC motor. After obtaining the complete model of DC drive system, the model is simulated using MATLAB(SIMULINK).The.
dc-to-dc converter or dc-chopper. Chopper is a dc to dc transformer: The input dc voltage can be increased (step-up) or decreased (step-down) in output side so a dc chopper circuit can be considered as dc equivalent to an transformer.
Using Semiconductor Devices in Chopper: (1) Power BJT, (2) Power MOSFET, (3) GTO, orFile Size: 1MB. 4 Chopper-Controlled DC Motor Drive • Chopper: The variable dc voltage is controlled by varying the on- and off-times of a converter.
• Fig. is a schematic diagram of the Size: KB. We can control and vary a constant DC voltage with the help of a chopper. Chopper is a basically static power electronics device which converts fixed DC voltage/power to variable DC voltage or power.
It is nothing but a high speed switch which connects and disconnects the load from source at a high rate to get variable or chopped voltage at the.
State the advantages of dc chopper drives. Dc chopper device has the advantages of high efficiency, flexibility in control, light weight, small size, quick response and regeneration down to very low speed. What are the types of control strategies in dc chopper.
Time ratio control. Current limit control File Size: KB. The principal scheme of a DC drive is given in Fig. The power circuit of the drive consists of a non-controlled rectifier, a filter, a braking chopper, and a 4-quadrant pulse width converter.
GTO thyristor switches used in drives with large power are shown in the figure. In drives with lower power, IGBT transistor switches are Size: KB.
Chopper controlled dc drives 1. Fig.3 Output Voltage Waveforms Application: Important application includes rolling mills, paper mills, machine tools, electrical traction, textile mills, excavators and.
Chopper based Speed Control of DC Motor using ATMEGA16 Microcontroller Shreekant1 Dr. Aspalli2 1PG Student P2 rofessor 1,2Department of Electrical & Electronics Engineering 1,2P.D.A College of Engineering, Kalaburagi, India Abstract—The speed control of DC motor for various applications is very important because DC motors have been.
In many different applications it is required to control speed of DC motor. One of the popular methods of speed control of DC motor is using chopper.
Chopper is a device that gives variable DC output from applied fixed DC input. It simply chops fixed DC and generates variable DC. Let us first understand how it generates variable DC. Chopper controlled DC motor Brushed DC Motors and How to Drive Them - Duration: PROJECT ON SPEED CONTROL OF DC MOTOR USING CHOPPER CIRCUIT - Duration: SimPowerSystem, One quadrant chopper DC drive.
 Chinnaiyan V. Kumar, Jerome Joritha, Karpagam, J. Mohammed, Design and Implementation of High Power DC-DC converter and speed control of dc motor using TMS FDSP, Proceedings of India International Conference on Power Electronics, Abstract.
This paper presents modelling and numerical simulation as well as prototype for speed control of DC series motor using a DC chopper. The pulse-width modulation method of control of semiconductor devices can help in controlling the output voltage of DC drives in turn controlling the speed for a wide range.
In this video we discussed about the DC to DC conversion by using thyristor and its application in the speed control of DC lly it work. Control of dc drives 1. Control of DC Drives BY: Keval Patel() Sandip Dobariya() 2. Introduction: The most common form of variable speed D.C.
drive is based on the control of armature voltage. The speed of D.C. motor has to be controlled from an A.C. or D.C. source. More commonly controlled rectifier is used to supply the motor armature. Phase locked loop control.Applications of this system range from larger industrial drives to small DC drives and servo motors such as those used in robotics, printers, and plotters.
The system microprocessor can also be interfaced to other control units for process control applications. Keywords: DC drives, Microprocessor Control, LMDServo Motors, Control.