title: ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ ÐºÐ¾ÑÑÐµÐºÑÐ¾ÑÐ¾Ð² ÐºÐ¾ÑÑÑÐ¸ÑÐ¸ÐµÐ½ÑÐ° Ð¼Ð¾ÑÐ½Ð¾ÑÑÐ¸ Ð´Ð»Ñ ÐºÐ»ÑÑÐµÐ²Ð¾Ð³Ð¾ Ð³ÐµÐ½ÐµÑÐ°ÑÐ¾ÑÐ° Ð½Ð°Ð¿ÑÑÐ¶ÐµÐ½Ð¸Ñ Ð¿ÑÐ¸ ÑÐ°Ð·Ð»Ð¸ÑÐ½ÑÑ ÑÐ¸Ð¿Ð°Ñ Ð½Ð°Ð³ÑÑÐ·ÐºÐ¸
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Research of power factor correctors for the key voltage generator under various types of load
Creators: name: ÐÐ»ÐµÐ², ÐÑÑÐµÐ¼
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2022
Subjects: ÐºÐ¾ÑÑÑÐ¸ÑÐ¸ÐµÐ½Ñ Ð¼Ð¾ÑÐ½Ð¾ÑÑÐ¸
ÐºÐ¾ÑÑÐµÐºÑÐ¾Ñ ÐºÐ¾ÑÑÑÐ¸ÑÐ¸ÐµÐ½ÑÐ° Ð¼Ð¾ÑÐ½Ð¾ÑÑÐ¸
ÐºÐ»ÑÑÐµÐ²Ð¾Ð¹ Ð³ÐµÐ½ÐµÑÐ°ÑÐ¾Ñ Ð½Ð°Ð¿ÑÑÐ¶ÐµÐ½Ð¸Ñ
power ratio
power factor correction
Gretz rectifier

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description: The main significance of the topic studied in the final work is to increase the power factor of key circuits operating on various types of load. This allows you to apply circuit solutions that ensure minimal impact on the supply network. In my case, a single-phase power supply is considered. To carry out the operation of a key voltage generator from a power source (from the mains), it is necessary to convert alternating current to direct current. The rectifier was assembled according to the Graetz scheme. The main feature of the key generator is that the active elements can be in two states: "open" and "closed". The most appropriate in the low frequency (LF) range is the use of transistors as AE. It should be noted that any AE in the closed state has a resistance other than zero. The presence of this resistance leads to a voltage drop across the AE. The principle of operation of this circuit is to alternately open and close two pairs of transistors. If the so-called deadtime (the delay between them) is not taken into account in this mode of operation, a short circuit will occur in the circuit and damage to the circuit elements, respectively.Using this circuit allows you to get twice the power than, for example, the power generated by a half-bridge generator.Like any non-linear device, the KG can adversely affect the supply network (PS). In this regard, one of the urgent problems is the study of the effect of CG on PS. It should be noted that the degree of distortion in the PS directly depends on the power of the devices. Distortion can lead to incorrect operation of other devices on the network or to their complete failure. Three types of circuits were considered: KG without power factor correction, with passive and active when operating on a resistive load and on a serial RLC filter. The passive gain corrector is an LC filter at the rectifier output. The basis of the active power factor corrector is a pulsed DC voltage converter. The standard switching power supply uses pulse-width modulation (PWM) mode to regulate the amount of power supplied by the power supply to the equipment connected to it. Among the possible AKKM structures, a step-up DC/DC converter operating in continuous current mode (i. e., when the value of the step-up inductor is chosen such that during the switching period a continuous current flows through the inductor), provides the smallest amount of high-frequency current flowing through the input capacitor (Svh). This is the only structure that reduces noise on the input capacitor, which is a major factor in determining the size and cost of the filter. In addition, only a part of the transmitted energy is stored in the step-up choke (because the energy is consumed from the network and when the choke is demagnetized). Thus, the required inductance of the inductor is less than with other structures. As a result, the DC-DC boost converter structure provides the lowest cost PFC, but does not provide protection against inrush currents and short circuits. To verify compliance with established state standards for electromagnetic compatibility, it is necessary to evaluate the value of KM and SOI. The first case under consideration is the model of a key voltage generator without a power factor corrector. To study the distortion, the time dependences of the current at the rectifier input and the diagram of the spectral components of the current with a resistive load are used.Using the numerical data of the spectral analysis, the calculation of the coefficient of non-linear distortion (THD) and power factor (PF) was made. The resulting values ââcomply with GOST standards. To study the distortions when working on a serial RLC filter, its elements were calculated and then a detuning of 50 percent was taken. Based on the results obtained, it can be concluded that the detuning of the RLC circuit has a significant impact on the parameters of the supply network. With a circuit detuning of 50 percent, a key voltage generator without a power factor corrector does not comply with GOST electromagnetic compatibility standards. A variant of the circuit with a passive power factor corrector, presented in the form of an LC filter connected to the rectifier output, was also considered. Preliminarily evaluating the values ââof KM and SOI, we can conclude that with an inductive or capacitive detuning of 50%, this version of the power factor corrector for a key voltage generator slightly reduces the detrimental effect on the supply network. The last stage of the study was an active power factor corrector. When operating the KG voltage on a purely resistive load, the values ââof SOI and KM turned out to be worse than in the circuit without PFC. This is because the active PFC is another pulse stage in the system. This leads to an increase in the level of high-frequency interference entering the supply network. Based on the data obtained, it can be concluded that the active CMC really improved the indicators of CNI and CM with a breakdown of 50%. The conclusion is presented on this slide.