Power factor correction pfc circuit tutorial homemade. Digital power simplified october 2015 presented by. Hence there is an urgent need to avoid this wastage. The hardware implementation was developed by using arduino uno rev3 main board which uses the atmega328 as the microcontroller. The power triangle in figure 7 shows apparent power demands on a system before and after adding capacitors.
This controller offers several different protection methods to assure safe, reliable operation under any conditions. Nowadays, the telecommunication power systems have output current of up to several kiloamperes, consisting of tens of modules. Implementing a flexible solution so that future modification can be realized by. Power factor correction application notes, white papers, users guides that teach how to solve the common challenges of pfc design. The problem of power factor correction pfc using a boost converter was described and a passivity based approach, which incorporates the adaptation of the load conductance, was proposed. This frequency is very low as compared to pwm based control of vsi for controlling the speed of the bldc motor drive. Tms320f2812 series dsp, produced by ti company, is used as the main control device in this system, and the dsp fixes the switch. Dsp implementation of predictive control strategy for power. Dsp based current sharing of average current controlled twocell interleaved boost power factor correction converter n. Sujitha2 1,2 department of electrical and electronics engineering, new horizon college of engineering, bangalore560103, india. Pdf digitally controlled boost pfc converter semantic scholar. Dsp implementation of predictive control strategy for.
Dsp implementation of a power factor correction strategy for. The integrated solution is based on these application notes. Power factor correction ic pfc controller technical. Liang zhou, member ieee and yi feng wu, member ieee. For example, in a washing machine controller built around a texas instruments tms320c24x digital signal controller, the main washer drive motor plus the auxiliary pump motors and solenoids are all controlled by a the single dsp based controller. The dsp will act as a controller which will give a corrected signal and pulse width modulation pwm block will generate pwm signal. The implementation of field oriented control for pmsm. The digital controller generates pulsewidth modulated pwm signals that drive igbt power modules which through line reactors inject harmonic currents in the network with exactly the opposite phase to the components that are to be filtered. Implementing multiple features using the same controller motor control, power factor correction, communication, etc. Abstract in this paper an advanced dsp based singlephase power factor correction approach for clean power is presented. Design of indirect power factor correction using 56f800e design of a motor control application based on processor expert 1. Detailed ideas of the ac induction control design are described in the application note, lowcost, 3phase, ac motor control system based on mc68hc, motorola order number an1664d. This thesis describes the design and development of a power factor corrector using pic programmable interface controller microcontroller chip. A digital power factor correction pfc control strategy.
The development of the telecommunications industry and the internet demands reliable, costeffective and intelligent power. The application note an1106, power factor correction in power conversion applications using the dspic dsc ds01106, describes the digital implementation of a singlestage pfc using a dspic digital signal controller dsc. It is designed to fulfil the international energy standards on input current harmonic distortion by reducing total harmonic distortion thd and improving the power factor of power supplies. Effective august 2014 sa02607001e passive harmonic filters. Tms320f2812 series dsp, produced by ti company, is used as the main control device in this system, and the dsp fixes the switch frequency at 20kps. Abstracta predictive algorithm for digital control power factor correction pfc is presented in this paper. May 01, 2000 since the control algorithm of the statcom is extended for power factor correction and load balancing, the performance of the statcom is studied for the improvement of power factor and load balancing which is discussed below. Pfc based on the sepic topology are reported, which allow comparison of converter performance with different control techniques. Digital control of two phase interleaved pfc and motor.
Presented in this dissertation is the implementation of power factor correction pfc preregulator controlled by a single microcontroller. Abstractthis paper present a design of the digital controller for continuous conduction mode boost converter with power factor correction pfc on xilinx fpga. Advanced power factor correction 4 in x 4 out architecture boosted dsp resources. Digital control is well recognized for its communication ability. The total work has been carried out in iea laboratory 7 and laboratory 4, located in the mbuilding at the faculty of engineers at lund university. Multipurpose, universal converter with battery control and realtime power factor correction abstract the electric power converter functions as an uninterruptable power supply, battery management, energy conversion, microgrid formation, and power factor correction including total harmonic distortion correction in real time. A dualloop controller is designed to control the average input ac current as well as dc bus. Power factor correction applied at the origin of the installation consists of a controller monitoring the vars and this controller switches capacitors in or out to maintain the power factor better than a preset limit typically 0. Case 1 assume a 400 kw load, 87% power factor with the following utility tariff. Use of pfc in motor drives is increasing because of increased regulation from the power utility side. This application note focuses on the design of an interleaved power factor correction ipfc converter.
Digital control techniques for power quality improvements in power factor correction applications by colin william clark b. As power supply designers embrace the transition from analog to digital controller based solutions, foremost on their minds is the challenge of crafting firmware that would accomplish all the power supply tasks using a processor with a welldefined, but limited computation capability. These control methods generate the duty cycles to provide higher unity power factor and lower total harmonic distortion of input current, even if ac line voltage is distorted. Advanced dsp based single phase power factor correction. Automatic power factor controller connection signal var6a or var12a auxiliary power supply ac110v 5060hz overvoltage relay capacitor control circuit provides protection against overvoltages on capacitors since overvoltages will shorten capacitor lifetimes and lead to explosion of capacitors in extreme cases. Abstracta new digital control technique for power factor correction is presented. The bridgeless pfc converter operates the correction of ac line current to obtain a dc output voltage without full bridge rectifier based on these control methods.
Ideally, the electrical appliance should present a load that emulates a pure resistor, in which case the reactive power drawn by the device is zero. Digital pfc ccm boost converter using xmc1400 microcontroller 300 w design example introduction 1 introduction power factor correction pfc shapes the input current of the power supply to be in synchronization with the ac input voltage, in order to maximize the real power drawn from the ac supply. It is based on freescales 56f800e controllers, which are ideal for motor control applications. Pfc preregulator systems, with input voltage sensing and without input voltage sensing, have. This thesis is the final presentation of the development of a digital signal processor dsp controller for power electronic converter applications. Interleaved power factor correction ipfc using the dspic dsc. Recently introduced dsp controllers help designers meet these tight performance versus cost goals. The control circuit designed is realized on a digital signal controller dspic30f4011 based on voltagefrequency vf. Lastly, some considerations regarding dynamic operation are given, together with information about control ics specifically developed for pfc applications. This involves measuring the power factor value from the load using pic and proper algorithm to.
Design and simulation of fpga based digital controller for. To achieve 99% efficiency, there are many design details that need to be taken into account. By installing power capacitors and increasing power factor to 95%, apparent power. Its controller is among the most complex with its threeloop. The goal of the paper developing a fully digital control for a boost power factor preregulator exploiting the potentialities of digital control to to compensate the digital delay computation approach controller improve the systems dynamic performance. The thirst for new sources of energy is unquenchable, but we seldom realize that we are wasting a part of the electrical energy every day due to the lagging power factor in the inductive loads we use. Dspbased singlestage full bridge power factor correction. Some utilities charge for low power factor but give a credit or bonus for power above a certain level. Current sensorless power factor correction based on digital current rebuilding francisco j.
Where bulk power factor correction is installed, other loads can in theory be connected anywhere on. The main objective is to study and develop the technology of automatic single phase power factor controller using arduino uno rev3 by controlling the power factor. If special provisions are not made to distribute the load current. Design of indirect power factor correction using 56f800e. The local exponential stability of the closed loop system was discussed in 3. Dsp implementation of a power factor correction strategy for bldc motor drive r.
Digital signal processing based speed control of induction. A dsp based controller for power factor correction pfc in a rectifier circuit. Chennai 600096, india abstract the paper develops a power factor correction mechanism for a brushless dc permanent magnet bldcpm motor drive system through the use of a front end boost converter. The control algorithm is implemented on a lowcost, fixedpoint 60mhz dsp controller tms320f28027. Because the computation requirement to implement this.
Different control loop parameters in analog domain are redefined. Dsp controller for power electronic converter applications. Power factor correction pfc preregulators are used between the ac line and nonlinear load to improve the line current in terms of power factor and total harmonic distortion thd. In practical usage, however, power factor correction to approximately 95% provides maximum benefit. Power factor correction circuit optimization within the modern smps switch mode power supply units could evolve in the recent past due to the advent of a number of advanced relevant integrated circuits ics, which has made possible to lay down different pfc designs having specific modes of operation and. Ramanan natarajan director, systems solutions, texas instruments abstract. A dsp titms320f2812 is used for the development of the proposed bldc motor drive. A dsp based controller for power factor correction pfc. Average current mode controlled power factor correction.
Automatic power factor controller using microcontroller. A dualloop controller is designed to control the average input ac current as well as dc bus voltage. Introduction digital signal processing dsp are designed for the purpose of control loop implementation, and are widely used on motor controlling, uninterruptible power supplies ups and movement controlling applications. This section presents the overview of the research work. The pfc converter is an important stage for the distributed power system dps. Digital control will provide the solution to systemmodule communication for the dc power supply. Continuousconductionmode ccm totempole power factor correction pfc is a simple but efficient power converter. Tristate boost power factor correction pfc converter operating in pseudocontinuousconduction mode pccm is analyzed in this paper. This paper introduces a power factor correction pfc main circuit adopting novel full bridge topology, in which the clamped capacitor limits voltage stress on the switch tube, reduces output voltage ripple, and improves the response velocity. As power supply designers embrace the transition from analog to digital controller based solutions, foremost on their minds is the challenge of crafting firmware that would accomplish all the power. The proposed pfc control strategy is based on the prediction, not feedback, to achieve power factor correction. Proceedings of 16th annual ieee applied power electronics conference and exposition, vol 1, pp 144149. Dsp based controller for various power electronics.
Introduction this document describes the design of an indirect power factor correction pfc application. Multipurpose, universal converter with battery control and. Digital pfc ccm boost converter infineon technologies. Making the complete implementation as simple as possible reduced component count, simple board layout and manufacturing etc. A study on dsp based power factor improvement using. The design of complex systems is made possible by the integration of the lnet ethernet based network. Dsp controllers for threephase unitypowerfactor rectifiers.
Dsp implementation of a power factor correction strategy. Current sensorless power factor correction based on. Single phase induction motor adjustable speed control using. Dsp control improves inverter performance and density power. Because the computation requirement to implement this control strategy is low, a 40mhz, 16bit, fixed point dsp can be used to realize digital control pfc system operating at high switching frequency. Average current mode, power factor correction, boost converter, dsp. If both current and voltage are sinusoidal and in phase, the power factor is 1. The modifications in the analog feedforwardcircuits and its.
It is designed to operate on 5060 hz power systems. Implementing multiple features using the same controller motor control, power factor correction, communication. In this paper a digital signal processor dsp based power factor correction pfc scheme is presented. The theory is articulated using a closed loop algorithm to revolve around the operating. Hence, the switching lossesin vsi corresponding to such. Digital implementation of an advanced static compensator for. Dspbased control of tristate boost pfc converter with high. A study on dsp based power factor improvement using single. The converter is running at a switching frequency of 50 khz.
Digital control of two phase interleaved pfc and motor drive using mcu with cla manisbhardwaj abstract power factor correction pfc is used in power systems operating from single phase ac to correct for the non linearity of the rectifier. Power factor correction pfc circuits are widely adopted for acdc power conversion. Vijayarajeswaran managing director, vi microsystems pvt. This chapter starts with an overview of the available digital signal processor dsp boards suitable for power converters control, indicating the main features for each case, such as analogue to digital conversion, communication channels, timers, pwm outputs, interruptions, among others. A dsp based controller for power factor correction pfc in a. Development of power factor controller using pic microcontroller. It evolves a wave shaping mechanism to arrive at the sinusoidal nature for the input current in an effort to improve the input power factor. Over the past 40 years many of my designs included power factor correction pfc ranging from 50 w to over 5. Based on this algorithm, all of the duty cycles required to achieve unity power factor in one half line period are calculated in advance by digital signal processors dsps.
Multifunction dsp provides the necessary inverter controls. The design is based on the conjunction of the ac induction motor control system with the digital power factor correction application. Stability in passivitybased boost converter controller for. A design of an automatic single phase power factor controller. Many control methods for the power factor correction pfc have been proposed. This method which is based designing in analogue domain and converting the resulting model in to digital domain will. A sinusoidal signal is generated based on the detected points and used as a reference to control the converter switch to obtain unity power factor and. This paper presents a computationally accurate technique to design an automatic single phase power factor controller by using microcontroller. Dsp based current controlled single stage single phase. Pdf dsp microprocessor basedon power factor correction. A 120 w single phase current source pfc based on buck type converter has been developed in this paper. In medium and high power applications, the interleaved boost pfc converter is the proper solution for this purpose to obtain a preregulator with lower size.
Overview of power factor correction approaches abstract power factor correction shapes the input current of offline power supplies to maximize the real power available from the mains. When combining tasks such as sensorless control or precision control of motors with running power factor correction algorithms, host communication, andor motion profile planning the capabilities of the 32bit processors are very beneficial. The pmp20873 reference design uses tis 600vgan power stage, lmg3410, and tis ucd38 digital controller. Single phase induction motor adjustable speed control. Pdf digitally controlled boost pfc converter semantic. Fu m, chen q 2001 a dsp based controller for power factor correction in a rectifier circuit. A single phase current source pfc converter based on uc3854. Pfc preregulator controlled by a single microcontroller. Which is specially designed to have an accurate control on the three phase induction motor. Ncp1650 power factor controller the ncp1650 is an active, power factor correction controller that can operate over a wide range of input voltages, and output power levels. Presented in this dissertation is the implementation of power factor correction. The implementation of field oriented control for pmsm drive based on tms320f28035 dsp controller roopa c1 and dr. Advanced dsp based single phase power factor correction approach.
Dsp based controller for various power electronics converters. An1106, power factor correction in power conversion applications using the dspic dsc an1078, sensorless field oriented control of pmsm motors using dspic30f or dspic33f digital signal controllers the application note an1106, describes the power factor correction pfc method. In motor control area, the applications of dsp and microcontroller is for control of dc motor, brushless dc motor, brushless permanent magnet servo motor, ac induction. Different control loop parameters in analog domain are redefined prior to their digital implementation. The second contribution is a novel dsp based discontinuous conduction mode dcm detection method for application to the boost pfc converter. The connection of power switch in parallel with inductor makes the boost converter operate in pccm, which provides an additional degree of control freedom by inductor current freewheeling operation mode. Figure 3 shows the principle block diagram of apfc. Arduino ide software was used as the compiler for the arduino uno.
St power factor correction controllers operate in transition mode tm and continuous current mode ccm, and are suitable for a widerangemains operation. The proposed approach draws near sinusoidal input current even when the input utility voltage is distorted. A closed loop digital algorithm is implemented on a low cost dsp tms320f243. A design of an automatic single phase power factor.
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