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 …

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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.

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Phase shift of voltage across capacitor in series RC

Phase shift of voltage across capacitor in series RC. Ask Question Asked 7 years, 4 months ago. Modified 7 years ago. Viewed 7k times 0 $begingroup$ ... I''m trying to determine the phase shift produced by C1 relative to that of V1 given only frequency and impedance. In the book it says that the answer is -25 degrees.

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80. The 90D Phase Shift of a Capacitor | UCLA Physics & Astronomy

This prevents you from hooking up the naive circuit below to show the 90° phase shift. You can "fake" the situation by using a small resistor (1000W) as shown below. The voltage across the resistor alone shows the phase of the current through the capacitor. The voltage across both is the voltage across the capacitor -- mostly, if R<< Xc.

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Universal Modeling Method and Reactive Power Optimization for Phase …

Abstract: This paper proposes a universal modeling method and a reactive power optimization strategy for phase-shift modulated resonant switched-capacitor converters (RSCs). Compared with the previous steady-state modeling method, only the node voltage between the resonant tanks is needed and the analysis process for different operation …

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An Improved DC Solid State Transformer Based on Switched Capacitor …

The current ripple performance and soft-switching performance are improved, and the number and capacity of switches are reduced, thereby increasing the efficiency and cost of the system. This paper proposes an improved dc transformer (NDCT hereinafter) based on switched capacitor with reduced switches for the integration of low …

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capacitor

Evaluate the phase shift between the voltage and the current flowing through the network. State whether the current leads or lags. I''ve found the complex impedance - it is $ Z=R + 1/jwC$ where j is the imaginary unit, w is the angular frequency and C is the capacitance.

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Dual-Phase-Shift Control Strategy With Switch-Controlled Capacitor …

In this paper, a dual-phase-shift control strategy combining with a switch-controlled capacitor (SCC) is proposed to realize efficiency maximization while realizing zero voltage switching (ZVS ...

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Phase detector

A phase detector or phase comparator is a frequency mixer, ... The quadrature signals may be formed with phase shift networks. ... to the capacitor acting as an integrator. A phase detector for a bang-bang charge pump must always have a dead band where the phases of inputs are close enough that the detector fires either both or neither of the ...

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Phase shift in AC Components

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.

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Measurement method for capacitive sensors for microcontrollers …

A new complete measurement method for capacitive sensors is proposed. • A interface circuit only consists of a low-pass filter and a phase shifter.. The method is designed to capacitive relative humidity sensors.. The method is for all microcontrollers with internal timers and ACs.. Good experimental results were obtained (the relative errors …

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CN102721876A

Fig. 1 is the circuit theory diagrams of circuit of testing the phase sequence among the embodiment.Circuit of testing the phase sequence 100 comprises the first shift capacitor C1, the second shift capacitor C2, divider resistance R3, first resistance R 1 and second resistance R 2.The end of the first shift capacitor C1 is that the other end ...

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(PDF) A Novel Hybrid Islanding Detection Technique Using Rate …

A Novel Hybrid Islanding Detection Technique Using Rate of Voltage Change and Capacitor Tap Switching July 2012 Electric Power Components and Systems 40(10):1149-1159

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Microwave gas sensing with a microstrip interDigital capacitor ...

1. Introduction. Due to the proliferation of indoor and outdoor sources of gaseous pollutants, air quality control has become an international and essential topic of interest, which now stimulates a wide interdisciplinary scientific community about sensors technologies [1], [2].Among all transduction techniques employed in gas detection, this …

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Modeling phase shift data of phase-detection autofocus by skew …

This work characterizes the distribution of phase shift for a given distance of the lens to the in-focus position as a skew-normal distribution and proposes a method based on Bayes'' theorem to determine the lens movement. Abstract. Recent mobile imaging seeks to expedite the autofocus process by embedding a phase detector in the image …

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A phase diagram approach to the detection and location of faulty ...

energized, and the argument of the unbalanced current phase did not exhibit a 120 phase shift. The argument of the unbalanced current was also affected when the capacitor bank energized, changing ...

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Hybrid islanding detection technique for single‐phase …

The parameters of the used anti-islanding methods are summarised in Table 3, where f is the frequency of utility voltage, θ m is the maximum phase angle, f m –f g is the frequency difference, f m is the frequency at which the maximum phase shift θ m occurs, K v is the voltage gain (The response time of the SVS algorithm can be adjusted …

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A phase diagram approach to the detection and …

The protection of traditional high voltage capacitor banks relies on an unbalance relay which operates when an internal fuse is blown. However, the unbalance relay cannot indicate cause or position of the fault. Thus, …

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CN102721876A

The invention relates to a phase sequence detection circuit which comprises a first phase shift capacitor, a second phase shift capacitor, a partial pressure resistor, a first resistor and a second resistor. One end of the first phase shift capacitor is a first end, and the other end of the first phase shift capacitor is connected to one end of the partial pressure …

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Capacitive Phase Shift Detection for Measuring Water Holdup in

In this paper, a phase shift detection system of flow impedance is designed based on a concave capacitance sensor (CCS). The flow impedance of …

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(PDF) Design Technique for Varactor Analog Phase …

Simulated frequency dependencies of |Γ RL | for the equalized RL with a single control channel, where C v varies from 0.15 pF to 0.45 pF with a step of 0.05 pF.

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Capacitance measurement method using sinusoidal voltage …

In this study, the measurement of the output stage capacitance in an isolating DC–DC converter output stage is shown, which is used to assess the capacitor condition. In …

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Capacitive Phase Shift Detection for Measuring Water Holdup in ...

In this paper, a phase shift detection system based on a concave capacitance sensor (CCS) is designed to measure the water holdup of horizontal …

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Measurement method for capacitive sensors for microcontrollers …

The interface circuit consists of a low-pass filter and a phase shifter with a capacitive sensor. A prototype circuit based on a mid-range 8-bit microcontroller has …

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A phase diagram approach to the detection and location of faulty ...

The protection of traditional high voltage capacitor banks relies on an unbalance relay which operates when an internal fuse is blown. However, the unbalance relay cannot indicate cause or position of the fault. Thus, an operator wastes time and human resources investigating the fault issues. To address this issue, a method to locate the fault position …

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capacitor

Evaluate the phase shift between the voltage and the current flowing through the network. State whether the current leads or lags. I''ve found the complex impedance - it is $ Z=R + …

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Phase Shift Regulated Resonant Switched-Capacitor-Based …

In the two-stage architecture of 48 V data center power systems, the front-end intermediate bus converter (IBC) needs to adapt to both 48 V nominal input voltage and a wide input voltage range of the backup battery (typically 40 V–60 V). To cope with this design challenge, we propose a phase shift regulated resonant switched-capacitor-based IBC. …

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180 degree AC phase shift using capacitors

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 …

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Online monitoring method for submodule capacitors in modular …

3.1 Principle of online capacitance monitoring. As can be seen from Sect. 2, there are two working states of an SM.When the MMC is inserted into the system, the SM capacitor continues to charge or discharge. The capacitor voltage and switch signal of the SMs are shown in Fig. 3, where the red line is the capacitor voltage and the blue line is …

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Phase-shift detection for capacitance sensor measuring void …

In this paper, a phase shift detection system of flow impedance is designed based on a concave capacitance sensor (CCS).

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