VFD Application on Induction Motor Control.
Speed control of AC motor using Variable Frequency Drive (VFD). The speed of AC motors remains constant because it takes rated power from supply and therefore it causes problems when less motor speed is needed. The VFD mechanism provides an approach for variation in speed of AC motors. The paper presents the working principle of VFD, its performance and the use of Pulse Width Modulation (PWM) in the three phase inverter to control or maintain the ratio of voltage to frequency. The model is simulated using spice models and the results are analyzed. This paper is intended to provide the basic understanding of VFD terms, vfd motor control operations and Power factor improvement.
The application and working principle of Variable Frequency Drive. The performance of vfd motor control is also described. The simulation model is simulated using MATLAB Simulink and their results are also analyzed. effective speed control are analyze. The common applications of vfd motor control are in air handler, chiller, pumps and tower fans. In paper analyze result shown the total harmonic distortion (THD) that means the distortion in source and torque production is less.
The invention relates to a vacuum cleaner with a regulating and control device for the motor of the fan assembly. A control element for the remote operation of the regulating and control device is provided in the vacuum cleaner on the handle of the suction pipe , connected to the suction nozzle, or of the guide pipe connected to the vacuum cleaner housing. In order to manage without a source of electric energy for the remote operation of the control device, there is provided on the vacuum cleaner housing a turbine arranged in a turbine chamber and coupled to an actuator assigned to the regulating or control device . A pipe serving for the supply or discharge of air leads from one side of the turbine chamber to the control element constructed as closure element. The other side of the turbine chamber is connected to the suction or delivery side of the fan assembly.
This seminar topic will discuss the impact of vfd motor control when installed in an industrialenvironment as related to the power system and to the electric motor.Topics such as Harmonics, Line transients, power surges and other power quality issueswill be discussed providing the student an insight of how these everyday electric powerdisturbances will create undesirable effects if not mitigated.noise issuesInverters today have an extremely fast switching time and this step change in voltage cancause communication issues, high motor stress and even damaging current flow throughmotor bearings.The student will learn how and why thevfd motor control can create these problemsand see the effect of damage that can occur if left unchecked.The cable between the motor and the vfd motor control behaves significantly different when on sinewave power versusvfd motor control.The student will learn the impact of the cable from veryshort length to extremely long distances.
In today's competitive market, industries are facing the growing demands-for improving process efficiencies, comply with the environmental-regulations-and to meet corporate financial objectives. The dynamic industrial manufacturing market, intelligent and low cost industrial automation systems-are required to improve their productivity and efficiency. There is a need for cost effective wireless automation system-which are secured and flexible. So in this regard the present work aims at remote monitoring and control of electrical parameters such as speed, current of Variable Frequency Drive vfd motor control fed-three phase Induction Motor with Programmable -Logic Controller (PLC) and LabVIEW software. The LabVIEW Graphical User Interface (GUI) act like server communicates with the remote authorized client and can access motor parameters via Transmission Control Protocol/Internet Protocol (TCP/IP). A hardware setup and an algorithm has been developed in PLC and Arduino module for acquisition of current and speed data of three phase Induction Motor.
The purpose is to introduce in a concise manner the fundamental theory, main results, and practical applications of canal automation. The paper is focused on the gate control of canal. The paper is purposefully written without "state-of-the-art" terminology for the benefit of practicing engineers in facilities today who may not be familiar with automation and its application in vfd motor control. Water is basic need of human and animal. In day to day life many requirement of water and government has most problem distribution of water in all places. Government has also got more priority funding and to distributed water in all places. So that save water is main purpose of project. With respect to irrigation canal modelling, a detailed procedure to obtain data- driven linear Irrigation canal models is successfully developed Control the level of water is the main aim of project. In Gujarat, Narmada is one of the biggest river and Sardar Sarovar dam one of the biggest dam.
A control system and method of a vfd motor control are disclosed. The control system controls an electric motor via a vfd motor control, and the electric motor drives the pump. The control system comprises: an anti-ripple injection module for injecting an anti-ripple signal into a control path, the anti-ripple signal causing pressure ripples in the pump output to he at least partially cancelled. Further disclosed is a pump system, comprising: a vfd motor control, an electric motor, and a pump, wherein the VFD comprises the control system stated above.
The input of the proposed auxiliary damping controller is the turbine output power. This is a standard signal that is monitored in power plant control rooms and is available locally without the need for additional measurement and/or communication infrastructure. The auxiliary damping controller (ADC) adds an auxiliary speed signal to the existing speed reference in the closed-loop motor drive control in response to any torsional range oscillations seen in , via a feedback compensator. The ADC extracts damping by exploiting SSR load interactions and is tuned using a residue-based pole placement technique. The ADC performance is evaluated for both torsional interaction and torque amplification types of SSR in the IEEE First Benchmark and IEEE 68-bus networks.
The primary function of a variable frequency drive (VFD) is to vary the speed of a three-phase ac induction motor. VFDs also provide non-emergency start and stop control, acceleration and deceleration, and overload protection. In addition, vfd motor control can reduce the amount of motor start-up inrush current by accelerating the motor gradually. For these reasons, VFDs are suitable for conveyors, fans, and pumps that benefit from reduced and controlled motor operating speed.
The VFD-M Series is manufactured with high-quality components and materials and incorporate the latest microprocessor technology available. This manual is to be used for the installation, parameter setting, troubleshooting, and daily maintenance of the AC motor drive. To guarantee safe operation of the equipment, read the following safety guidelines before connecting power to the AC motor drive. Keep this operating manual at hand and distribute to all users for reference. To ensure the safety of operators and equipment, only qualified personnel familiar with AC motor drive are to do installation, start-up and maintenance. Always read this manual thoroughly before using VFD-M series AC Motor Drive, especially the WARNING, DANGER and CAUTION notes. Failure to comply may result in personal injury and equipment damage. If you have any questions, please contact your dealer.
Variable frequency drives (VFDs) are widely applied on induction motors to reduce electrical power by adjusting power frequency. Meanwhile VFDs also adjust power voltage based on different voltage controls, including a linear ratio, a squared ratio and a flux optimizer. Moreover, VFDs measure motor operating data, such as frequency, current, voltage and power, and provide them through their analog outputs. However, it is not clear whether the VFD analog output data are accurate and how the different voltage controls impact the drive system performance. The purpose of this paper is to investigate the accuracy of VFD analog output data and the energy performance of different voltage controls through an experiment conducted on a vfd motor control system. First the operating data provided by the VFD and measured by a power analyzer were compared, then the efficiencies of the motor-belt, VFD, and drive system among different voltage controls were measured and evaluated.
In recent years, with the rapid development of the Internet around the world, the network technology is widely applied in all kinds of enterprises and industry system, more and more information products need to be able to access to the Internet via a Web page for remote access and control. Through a Web server sends the request commands are described in this paper, through the Internet data transmission, real-time control of PLC, realize flexible control of motor speed by the vfd motor control, finally realizes the remote monitoring.
DUE IN PART TO AN INCREASED FOCUS on energy-savings,the use of pulse-width-modulated variable-frequency drives(VFDs)to control AC motors has grown dramatically in recent years.However,shaft currents induced by vfd motor control can destroy motor bearings,leading to costly downtime and lost production.Without some form of mitigation,destructive voltages build up until they find a path to the motor frame(ground).All too often,these voltages discharge through the bearings,causing damage that can result in bearing noise,bearing failure,and subsequent motor failure.
The technology behind and applications of smart motor control centers (MCCS) being used today in mineral processing facilities. The two technologies to be discussed are solid-state motor controllers that can be installed in MCCs and the complementary digital communication networks that can transmit operational parameters of the solid-state devices to the supervisory system The toughness and reliability of solid-state technologies have led to a dramatic increase in their usage throughout the mining industry. Products such as solid-state motor protectors, controllers, and variable-frequency drives have demonstrated greater flexibility and performance in a variety of applications than their electromechanical and mechanical counterparts. VFD Application on Induction Motor Control.The three key trends apparent in the solid-state devices are: 1. A shift to smaller, smarter, more integrated devices, which allows a single solid-state device to serve the purpose of multiple electromechanical devices but in a much smaller form factor.
The purpose of this project was to design a set up for a lab that would serve as an introduction to variable frequency drives. The original plan was to have a digital to analog control (DAQ) scheme using a computer based program such as Vissim to receive an input from a motor and to output a control system to the vfd motor control to regulate a certain speed or pattern. This would give students a chance to practice controlling motors with an automated system using feedback which could be useful in many industrial applications.
A drive control assembly for a motor including a variable frequency drive module for providing variable speed control for the motor, a bypass module for providing bypass control for the motor, and a switch for switching control for the motor between the variable frequency drive module and the bypass module. The bypass module can provide control for the motor even when the variable frequency drive module is removed from the drive control assembly.
Simulation and emulation system using Matlab and SCADA (supervisory control and data acquisition). Matlab is used for micro hydropower plant simulation. The emulation system is composed by a SEIG (self-excited induction generator) coupled to an electric motor drived by frequency converter. The Modbus RTU (Remote terminal unit) protocol connects SCADA with the frequency converter and OPC (object linking and embedding for process control) links SCADA with the Matlab environment. Hydropower plants simulation systems requires integration of several components and for this purpose it was used a SCADA system to process information and make it available to the operator in real time.
The optimist says the glass is half full, the pessimist says the glass is half empty; the engineer says the glass is twice as large as it needs to be. This joke's underlying truth may seem straightforward, but as engineers, we often lose sight of these types of basic guiding principles when selecting equipment for a particular application. So while we will often specify vfd motor control for motors as a "cover-all" solution to all our energy efficiency and control considerations, those same generic standard practices often have a rate of return less than expected or are just plain ineffective in doing what we thought they would do.
A Siemens MM440 frequency converter was controlled by the Siemens S7-200 PLC to realize multi-speed andforward/reverse rotation control with a three-phase asynchronous motor. The control system was composed of two mod-ules: Siemens S7-200 PLC and MM440 VFD. After the hardware system was design and assembled, the software was de-signed, and the running and debugging of the system were done. The results show the system allows manual frequency se-lection as well as automatic frequency conversion.
Induction motor are widely used in various industries. With the advanced technology development of Variable frequency drive, vfd motor control fed induction machines are using more frequently in industry because of its decreasing cost and advantages of robustness, size and maintenance of induction motor over DC. VFD provides flexibility in starting and speed control and improves performance of induction motors. Factors which affects the starting performance has studied. This paper deals with the investigation and experimental tests on the main concept of induction motor which is an important factor facing problems recently in various industries. The system was investigated , tested andtorque reduces. In order to make torque constant slip speeddecreases hence speed falls . To maintain speed it consumesrated power which is an economical disadvantage.The intent of the paper is starting, speed control ofinduction motor. Which means limiting the starting currentand increase the starting torque and so as to protect theinduction motor.
A novel approach to matrix-converter-based variable frequency drives is presented. It is proposed that these drives are used to provide or draw out reactive power from the power distribution line, keeping the power factor close to unit and, simultaneously, performing their primary function of motor powering and speed control. This application of matrix-converter-based variable frequency drives is required due to the need to compensate for capacitive reactive power generated by light emitting diode lighting devices. In this study, the reactive power compensation range of the matrix-converter-based variable frequency drive is determined, and a method is proposed to extend the compensation range.
This article introduces the new generation NC EVFD series engineering variable frequency drive provided by NANCAL company.NC EVFD uses the technology of multi-drives connected common DC bus,with metal film DC capacitor,module designed and high power density.VFD Application on Induction Motor Control.The motor control algorithm uses the high-performance vector control algorithm,which provides high precision speed control and quick dynamic response.NC EVFD is suitable for high power,high performance and high reliability applications.
The advances in power electronics devices have opened the possibility of counting on Synchronous Reluctance Motors (SynRM) where variation of speed is required. However, Induction Motors (IM) have successfully supplied this demand in industrial applications. As for traction applications, SynRM aided by Permanent Magnet is also an alternative to Interior Permanent Magnet Motors (IPM). In this study, a 55kW Inverter-Driven Induction Motor (IDIM) was designed and evaluated through Indirect Field Oriented Current Control (IFOCC) strategy. Likewise, an equivalent Synchronous Reluctance Motor with inductance ratio in the range of 6-10 was also designed by using the same stator as IDIM. A Vector Control (VC) strategy based upon the point of maximum power factor was implemented to test its performance. Both motors optimized for variable speed applications were compared under the same variations of load, voltage and frequency in order to assess their consumption from an input apparent power point of view.
Water distribution system is important in our modern world. Consumer needs an adequate water to be supplied directly through pipes, storage facilities or component that conveys water in homes, school, hospital or industries. The public water system depends on distribution system that provide water carried from the treatment plant. There are normally going to have several issues in maintenance such as it is difficult to control the water speed and a higher tendency of easily malfunction when using DC motor to control the water flow. The operation of the water distribution is done manually and need human assistance so it tends to have an inconsistent water level. Besides that, when unpredicted situation happen, for instance, a worker of the station could hardly detect leaks or problem if there is no monitor system. The purpose of this project is to design and implement the PLC Based VFD System for Three-Phase Induction Motor.
The marine & offshore and drilling markets are requiring larger brakes, and more demanding cyclic loading of tension and brake control system. Because of a backlog of testing, customer requirements for extended life of friction materials, and demand for larger clutches and brakes, The Clutch manufacture decided that the throughput and capacity of their existing 1500HP test stand needed to be doubled. The existing test stand utilized a 1500HP Variable frequency drive (VFD) and motor to: performance test and burnish brakes for customers, run static and dynamic load changes on clutches and brakes for research and development, and for customer specific applications. The existing VFD and motor were to remain and be re-used. A second identical VFD and motor would be added, and both would be connected to a combining gearbox. Each VFD and motor can test a single 1500HP brake, or both VFDs systems can be combined to run a single 3000HP brake.
The system has a brake fluid pressure modulator (MD) between the main cylinder (MC) and the wheel brake cylinder, a pump (HP) delivering fluid to the modulator under pressure and a container for storing fluid let out of the wheel cylinder by the modulator. A first valve normally connects the main cylinder to the modulator. A second valve normally blocks the connection between the main cylinder and pump inlet. A non-return valve enables fluid to flow to the pump and prevents reverse flow. A regulator actuates the pump in continuous drive if it is regulating the modulator and actuates the second valve to connect the main cylinder to the pump if the braking pressure in the wheel cylinder is increased.
The present invention relates to a circuit for providing conditioned alternating current to a motor for running a well pump reciprocating motor which experiences uneven torque. A system is provided for conditioning the primary electrical supply 310, bussing the conditioned primary service 318 to a variable frequency drive apparatus VFD 336 which alters the line frequency of the alternating current to a controlled frequency to change the speed of the motor in response to a signal received from a well controller 330, and, if the system begins to inductively regenerate current when the speed of the rotor exceeds the line frequency from the drive, to condition and shunt the excess direct current R to the primary supply side 318 of the variable frequency driver where it may be reused.
