Internal Failure Detection and Protection on Capacitor Banks …
4 Figure 6: 0.008H-bridge: Compensating failures results in no unbalance signal [1] The following cases are two examples of undetectable elements failure in a 107 Mvar, internally fused capacitor
Capacitive Phase Shift Detection for Measuring Water Holdup in …
In this study, a phase shift detection system of flow impedance is designed based on a CCS to measure the water holdup of horizontal oil–water flows. Firstly, impedance …
Measurement method for capacitive sensors for microcontrollers based on a phase shifter …
A phase shift between a reference signal and the output signal of a phase shifter circuit (based on an active all-pass filter) with the capacitance sensor is measured using an oscilloscope. Often, capacitive sensors are implemented as smart sensors; that is, they work as data acquisition systems.
Simplified Guide: Wiring a Baldor Single Phase Motor with Capacitor …
Capacitor: In some single phase motors, a capacitor is used to provide an additional phase shift to the motor windings. This helps to improve the starting torque and efficiency of the motor. The capacitor is connected in series with the start winding of the motor and is controlled by a centrifugal switch, which disconnects the capacitor once the motor …
Capacitor Detection by Phase Shift. 7710205 - 11287732 - USPTO Application Nov 28, 2005 - Publication May 04, 2010 KyawSwa Maung Manoj Dey. Abstract. A method and apparatus for detecting capacitive devices are disclosed. A circuit including two circuit paths is connected to an oscillator voltage source. Connecting a test capacitive device to a ...
Fault detection and tolerant control for flying-capacitor modular ...
In this paper, an IGBT open-circuit fault detection and fault-tolerant control strategy are proposed for a flying-capacitor modular multilevel converter (FC-MMC) feeding induction motor drives. Fault occurrence is detected by monitoring the sum of measured AC-circulating currents. In the fault case, the phase with the faulty device is identified through …
Passing the first circuit path through a reference comparator and the second circuit path through a phase-shifting comparator produces two output signals that are phase-shifted with respect to each other when the test capacitive device is functional. ... US20070120608A1 - Capacitor detection by phase shift - Google Patents Capacitor detection ...
A New Definition of Voltage Unbalance Using Supply Phase Shift
To comparatively examine the proposed definition using a MATLAB-based simulation, a model of a star connected, ungrounded, three-phase induction motor was developed with a positive-sequence impedance (ZM 1) of 3.0642 + 3.2266i Ω, and negative-sequence impedance (ZM 2) of 0.2336 + 0.4194i Ω obtained using Eqs. () and (), …
An Active Split-Phase Control Technique for Hybrid Switched-Capacitor ...
Hybrid switched-capacitor (SC) converters have gained popularity due to their efficient switch utilization and use of energy-dense capacitors, which allows them to achieve high efficiency and power density even at large conversion ratios. The Dickson converter is one such popular hybrid SC converter, as it can achieve the theoretical minimum switch …
Sliding Mode Controlled and Phase-Shift Switched Capacitor …
This paper introduces a multiport phase-shifted switched capacitor converter that can be used in a DC-DC converter system that draws power from both solar panels and batteries. The proposed circuit uses a switched capacitor converter with multiple outputs and a variety of filters. The ZVS is the intended result of the design, and voltage …
$begingroup$ A transmission line balun is a suitable option for 180 degrees shift at 350 GHz. Capacitors only ''shift by 90'' when comparing current to voltage. You need to involve other components to shift voltage to voltage, then the shift per cap becomes less than 90.
An online detection method for capacitor voltage transformer with ...
1. Introduction. Cross-regional consumption of clean energy has transformed the electricity market in China and Europe [1].The sharp rise of energy trade demands accurate power metering, whose realization is based on accurate measurement of grid voltage [2].CVT is one of the crucial metering devices widely used in high voltage grids …
Another way of describing the phase component is phase shift, meaning that the phasor conveys how much the signal has shifted relative to a signal that has zero phase. Mathematically, this zero-phase signal is a cosine waveform, but in practice AC signals don''t have a beginning or end, so you choose one of the signals and call it a cosine wave.
A Modulation Map for a Family of Phase-shift-modulated …
In this paper, the relationship between the voltage gain, ZVS turn-on region, component stress and control variables (phase-shift angle, frequency ratio and quality factor) is analyzed comprehensively. On the basis, a modulation map with the optimal operation region was proposed for a family of resonant switched- capacitor converters with phase …
In this paper, a phase shift detection system of flow impedance is designed based on a concave capacitance sensor (CCS). The flow impedance of oil–water stratified flow is investigated by establishing an …
Measurement method for capacitive sensors for microcontrollers …
Phase-shift detection for capacitance sensor measuring void fraction in two-phase flow Sens. Actuat., A, 160 ( 1–2 ) ( 2010 ), pp. 78 - 86 View PDF View article View in Scopus Google Scholar
Capacitors only ''shift by 90'' when comparing current to voltage. You need to involve other components to shift voltage to voltage, then the shift per cap becomes less than 90. ... Otherwise, "180deg phase shift" between an input and an output is obtained with an active circuit forming an inverting amplifier, ...
Passing the first circuit path through a reference comparator and the second circuit path through a phase-shifting comparator produces two output signals that are phase-shifted …
Phase-shift full bridge power supply based on SiC devices
The gate is a capacitor network, and the drive circuit has distributed inductances and drive resistors, and the main circuit also has stray inductances. ... The phase-shift full bridge power supply based on SiC is designed to transform the 270 V DC to 220 V AC/50 Hz, which consists of two stages. The former stage is a phase-shift full …
An Optimal Variable Frequency Phase Shift Control Strategy for …
Abstract: In inductive power transfer (IPT) systems, zero-voltage-switching (ZVS) operation within wide power range is an urgent requirement to improve system efficiency and reduce electromagnetic interference. The combination of phase shift (PS) control and variable frequency control is usually adopted to realize ZVS operation. …
Modular Equalization System Based on Star-Connected Phase-Shift ...
This article presents a modular equalization system integrating module- and cell-level voltage equalizers for energy storage systems consisting of series-connected modules, each comprising multiple cells connected in series. Star-connected phase-shift switched capacitor converters (PS-SCCs) and tapped-inductor-based resonant voltage multiplier …
Balancing scheme for phase current and flying‐capacitor voltage …
The active die area is 2.4 mm 2 including four flying capacitors of 2 nF each and an output capacitor of 7.2 nF. The capacitors are implemented with MOS capacitors and metal-oxide-metal capacitors and the package bond wires are employed for inductors . The switching frequency of each sub-converter is 350 MHz with a 90° phase shift.
Capacitive Voltage Divider as an AC Voltage Divider
When the capacitor values are different, the smaller value capacitor will charge itself to a higher voltage than the larger value capacitor, and in our example above this was 6.9 and 3.1 volts respectively. Since Kirchhoff''s …
A phase detector or phase comparator is a frequency mixer, analog multiplier or logic circuit that generates a signal which represents the difference in phase between two signal …
Phase‐shift modulation in double half‐bridge inverter with …
In this study, the application of the phase-shift modulation to a double half-bridge resonant inverter supplying inductive loads with a common resonant capacitor is analysed in order to control the output power provided to the load of each converter.
Phase-shift detection for capacitance sensor measuring void …
In this paper, a new measuring procedure was tested utilizing the phase shift between the sinusoidal signal passing the capacitance sensor and a reference …
Modular Equalization System Based on Star-Connected Phase-Shift ...
Abstract: This article presents a modular equalization system integrating module- and cell-level voltage equalizers for energy storage systems consisting of series-connected modules, each comprising multiple cells connected in series. Star-connected phase-shift switched capacitor converters (PS-SCCs) and tapped-inductor-based resonant voltage multiplier …
Fast bus voltage detection method for single-phase power …
DOI: 10.1007/s43236-024-00827-z Corpus ID: 269687675; Fast bus voltage detection method for single-phase power converters with split capacitors based on reduced-order generalized integrals
Capacitive Voltage Divider Circuit as an AC Voltage Divider
Consider the two capacitors, C1 and C2 connected in series across an alternating supply of 10 volts. As the two capacitors are in series, the charge Q on them is the same, but the voltage across them will be different and related to their capacitance values, as V = Q/C.. Voltage divider circuits may be constructed from reactive components just as easily as …
An Optimal Variable Frequency Phase Shift Control Strategy for …
To solve this problem, this article proposes an optimal variable frequency phase shift (VFPS) control strategy for LCC-S systems to realize ZVS operation within …
Compared with traditional PS LLC converters, the proposed method can achieve 1) smaller phase shift variation range, 2) lower turn- off current, and 3) wider soft switching range, resulting in higher efficiency. An 825-W prototype with 200 V input and 125–210 V output range verified the features of the proposed idea, and the efficiency ...
Therefore a phase shift is occurring in the capacitor, the amount of phase shift between voltage and current is +90° for a purely capacitive circuit, with the current LEADING the voltage. The opposite phase shift to an inductive circuit.
