DC series motor
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This document discusses methods for controlling the speed of a DC series motor. It first defines a DC series motor as one that is used where high torque is required. It then lists four main methods for controlling the speed: flux control via diverting field current, armature resistance control by adding a variable resistor, armature voltage control by varying the voltage, and armature current control by reducing current at constant voltage. The advantages are highly controllable speed over a wide range, while the disadvantages are unreliable at low speeds and difficulty achieving stepless speed control for high power.
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1) A universal motor can operate on either AC or DC power sources. It has series-connected rotor and stator windings.
2) An AC series motor is electrically similar to a DC series motor but uses special construction materials to reduce losses from eddy currents.
3) Speed control of an AC series motor is similar to a DC series motor and can be achieved through armature resistance/reactance control, field flux control, or armature voltage control. Armature voltage control is commonly used for large motors.
Lecture dc machines
DC machines operate on the principles of electromagnetic induction and force. They have commutators, field windings, and armature windings. DC machines can operate as motors or generators depending on the direction of power flow. Speed in DC motors can be controlled through methods like armature voltage control, field control, and armature resistance control. DC generators have open-circuit, load, and external characteristics that define their performance based on variables like terminal voltage, field current, and load current. Efficiency is impacted by losses such as copper losses and mechanical losses.
Unit 2 - DC-Motor-Drives-pptx.pptx
This document discusses DC motor drives and closed loop control methods. It covers DC motor types, performance characteristics, starting, braking methods, and closed loop control systems for current limit, torque, and speed control. Specifically, it describes regenerative, dynamic, and plugging braking and how closed loop current limit control uses feedback to maintain current below safe limits during starting. It also explains how closed loop torque control follows a reference torque set by an accelerator and closed loop speed control uses an inner current loop and outer speed error loop.
1550091 634842733511023750
The document provides information about Diesel Locomotive Works (DLW) in India. It discusses that DLW was established in 1961 in collaboration with American Locomotive Company to meet India's increasing transportation needs. DLW manufactures diesel-electric locomotives and components in-house. It has evolved into a fully integrated plant capable of manufacturing all locomotive parts. The document then covers advantages of diesel over steam locomotives, components of a diesel-electric locomotive like the diesel engine, alternator, traction motors, and their functioning. It also discusses bogies, rectifiers, cranes, and testing procedures for locomotives.
New TDS Course.ppt
The document provides information on training for the TDS-11S top drive system. It includes sections on safety, top drive development history, system features and advantages, specifications, dimensions, installation, consumables, lubrication schedules, and typical mast interfaces. The document contains detailed diagrams, charts, and specifications to outline the components, operation, and maintenance of the TDS-11S top drive.
Ls catalog thiet bi dien mv drive e_110628_dienhathe.vn
Khoa Học - Kỹ Thuật & Giải Trí: http://phongvan.org
Tài Liệu Khoa Học Kỹ Thuật: http://tailieukythuat.info
Thiết bị Điện Công Nghiệp - Điện Hạ Thế: http://dienhathe.org
Ls catalog thiet bi dien mv drive e_110628
This document provides information about medium voltage variable frequency drives (MV VFDs) including:
- MV VFDs are available in voltage classes from 3kV to 10kV and capacities from 200kVA to 11,000kVA.
- They use sensorless vector control and multi-level pulse width modulation to generate strong torque at low speeds.
- MV VFDs can provide energy savings of up to 30% compared to damper-based airflow control systems through optimized motor control.
- Additional features include automatic motor parameter measurement, built-in cell bypass for redundancy, high power factor control, and monitoring interfaces.
Dc motor
This presentation summarizes different types of DC motors, including separately excited, shunt, series, and compounded DC motors. It was presented by four students - Abu Talha, Abdur Rahim, Rajjab Ali, and Mosharaf Hossain. The presentation discusses the overview, components, speed control methods, applications, and losses of various DC motor types. It aims to provide an overview of DC motors for discussion.
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DC series motor
- 1. SPEED CONTROL OF DC SERIES MOTOR
- 2. ASIF IQBAL ANIK ID:19-40026-1 DEP: EEE STUDENT OF AIUB
- 3. INDEX DS SERIES MOTOR EQUATIONS HOW TO CONTROL THE SPEED FLUX CONTROL METHOD ARMATURE RESISTANCE CONTROL METHOD ARMATURE VOLTAGE CONTROL ARMATURE CURRENT CONTROL ADVANTAGES AND DISADVANTAGES
- 4. DC SERIES MOTOR A DC SERIES MOTOR IS A MACHINE THAT IS USED AT A PLACE WHERE HIGH TORQUE OPERATING CONDITIONS ARE REQUIRED
- 5. EQUATIONS N=KEB / Ф N = K (V – IARA ) / Ф,
- 6. HOW TO CONTROL THE SPEED? #THE SPEED OFTHE DC MOTOR CAN BE CHANGED BY, •VARYING SUPPLYVOLTAGE(V) •VARYING FLUX PER POLE(Ф) •VARYING ARMATURE RESISTANCE (RA) #THE SPEED OF DC SERIES MOTOR CAN BE CONTROLLED BY, •FLUX CONTROL METHOD •ARMATURE RESISTANCE CONTROL METHOD •CONTROLLING THE ARMATURE VOLTAGE •CONTROLLING THE ARMATURE CURRENT
- 7. FLUX CONTROL METHOD #INTHE SERIES MOTOR,THEVARIATION OF FLUXCAN BE BROUGHT ABOUT BY DIVERTINGTHE CURRENT FLOWINGTHROUGHTHE SERIES FIELDWINDING BY ANY ONE OFTHE FOLLOWING METHODS. • FIELD DIVERTER METHOD • ARMATURE DIVERTER METHOD • TAPPED FIELD CONTROL • SERIES-PARALLEL CONNECTION OF FIELD COILS
- 8. ARMATURE RESISTANCE CONTROL METHOD • MOST COMMONLY EMPLOYED METHODS • AVARIABLE RESISTOR ISATTACHED IN SERIES • BYTHE INCREASE INTHE SERIES RESISTANCEVALUE
- 9. ARMATURE VOLTAGE CONTROL • VARYING ARMATURE VOLTAGE (VA) • CONSTANT TORQUE • FIX ARMATURE CURRENT
- 10. ARMATURE CURRENT CONTROL • THE TORQUE STARTS TO DECAY • ARMATURE VOLTAGE IS CONSTANT • THE ARMATURE CURRENT IS REDUCED NON-LINEARLY
- 11. ADVANTAGES AND DISADVANTAGES ADVANTAGE • HIGHLY CONTROLLABLE SPEED • WIDE SPEED VARIATION DISADVANTAGE • UNRELIABLE AT LOW SPEEDS OPERATIONS. • PROBLEM IN GETTING THE STEPLESS CONTROL OF SPEED IN HIGH POWER
- 12. REFERENCES • FILE:///E:/STUDY/INDUSTRIAL/FINAL/DC%20DRIVES.PDF • HTTPS://PNPNTRANSISTOR.COM/SPEED-CONTROL-OF-DC- SERIES-MOTOR/ • HTTPS://WWW.THOMASNET.COM/ARTICLES/INSTRUMENTS- CONTROLS/DC-MOTOR-CONTROLLERS/ • HTTPS://WWW.WATELECTRICAL.COM/DC-SERIES-MOTOR- WORKING-PRINCIPLE-SPEED-CONTROL- APPLICATIONS/#:~:TEXT=DEFINITION%3A%20A%20DC%20SERIES%2 0MOTOR,ARMATURE%20WINDING%20OF%20THE%20MOTOR.
- 13. THANK you