Pole-Zero-Cancellation Technique for DC-DC Converter

Abe, Seiya; Zaitsu, Toshiyuki; Obata, Satoshi; Shoyama, Masahito; Ninomiya, Tamotsu

doi:10.5772/18590

Cited by 4 publications

(3 citation statements)

References 8 publications

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“…Typically, the zero-pole cancellation method is employed to build the linear compensation component [ 31 ], and the compensation model structure is created as follows:

where

and

are the system’s damping ratio and angular frequency, respectively. It is important to keep

at a reasonable value in order to attenuate the high-frequency noise received by the measurement system.…”

Section: D-dot Sensor Identification and Compensationmentioning

confidence: 99%

Identification and Compensation for D-Dot Measurement System in Transient Electromagnetic Pulse Measurement

Jin

Liu

2022

Sensors

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The measurement of the transient pulsed electromagnetic (EM) field is essential for analyzing electromagnetic compatibility. Due to their good performance, D-dot sensors, combined with numerical integration computation for signal recovery, are commonly used to measure electromagnetic pulses (EMPs). However, the integration approach is occasionally flawed due to a non-ideal frequency response or noise, causing distortions in the reconstructed signal. In order to better understand the dynamic performance of the sensor, a nonlinear Hammerstein model is employed in the system identification for the sensor with the calibration data collected in the laboratory environment. When identifying the linear component based on the ultra-wideband characteristics of the measured transient pulse, a two-step identification approach with two different pulse excitation modes, low frequency and high frequency, is utilized to conduct the modeling across the entire frequency range. Based on the reliable identification and modeling of the D-dot sensor, a compensation system that corresponds to the nonlinear Hammerstein model has been developed for the practical signal recovery of the incident E-field. After compensation, the dynamic characteristics of the sensor are significantly improved, and the system compensation approach outperforms the integration method in signal recovery for the incident E-field.

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“…Typically, the zero-pole cancellation method is employed to build the linear compensation component [ 31 ], and the compensation model structure is created as follows:

where

and

are the system’s damping ratio and angular frequency, respectively. It is important to keep

at a reasonable value in order to attenuate the high-frequency noise received by the measurement system.…”

Section: D-dot Sensor Identification and Compensationmentioning

confidence: 99%

Identification and Compensation for D-Dot Measurement System in Transient Electromagnetic Pulse Measurement

Jin

Liu

2022

Sensors

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“…This work aims to develop the fuzzy TS model of a buck-boost converter, considering the non-idealities of the components [2], to be a test framework of nonlinear scenarios for a discrete PID controller designed by the pole cancelling method obtained through the linear model [25,26]. The premise is that the controller output voltage obtained linearly and designed to control the voltage only at the typical operating point can be tested at different operating points.…”

Section: Introductionmentioning

confidence: 99%

Design of a Takagi–Sugeno Fuzzy Exact Modeling of a Buck–Boost Converter

Gotz,

Bigai,

Harteman

et al. 2023

Designs

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DC–DC converters are used in many power electronics applications, such as switching power supply design, photovoltaic, power management systems, and electric and hybrid vehicles. Traditionally, DC–DC converters are linearly modeled using a typical operating point for their control design. Some recent works use nonlinear models for DC–DC converters, due to the inherent nonlinearity of the switching process. In this sense, a standout modeling technique is the Takagi–Sugeno fuzzy exact method due to its ability to represent nonlinear systems over the entire operating range. It is more faithful to system behavior modeling, and allows a nonlinear closed-loop control design. The use of nonlinear models allows the testing of controllers obtained by linear methods to operate outside their linearization point, corroborating with robust controllers for specific applications. This work aims to perform the exact fuzzy Takagi–Sugeno modeling of a buck–boost converter with non-ideal components, and to design a discrete proportional–integral–derivative (PID) controller from the pole cancellation technique, obtained linearly, to test the controller at different operating points. The PID control ensured a satisfactory result compared with the stationary value of the different operating points, but it did not reach the desired transient response. Since the proposed model closely represents the operation of the buck–boost converter by considering the components’ non-idealities, other control techniques that consider the system’s nonlinearities can be applied and optimized later.

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“…The compensator in this paper is considered as a linear object and may be described by properly defined transmittance. The methods of converter design, in particular their control circuits are considered in textbooks and papers [1,2,[6][7][8][9][10] as well as in manufacturer's technical reports and application notes, for example [11][12][13][14][15]. In a standard approach, an analog control circuit is used, based on an error amplifier.…”

Section: Introductionmentioning

confidence: 99%

Characteristic frequencies in averaged description of step-down (BUCK) DC-DC power converter

Janke

2016

Archives of Electrical Engineering

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Abstract:In the description of small-signal transmittances of switch-mode power converters several characteristic frequencies are usually used, corresponding to poles and zeros of transmittances. The knowledge of these frequencies is important in the design of control circuits for converters and usually are assumed to be constant for a given power stage of a converter. The aim of the paper is to evaluate the influence of converter primary parameters and load conductance on characteristic frequencies. Analytical derivations and numerical calculations are performed for an ideal and non-ideal BUCK converter working in continuous or discontinuous conduction mode. Key words: switch mode DC-DC converter; step-down converter, BUCK power converter; small-signal transmittances; sharacteristic frequencies Selected symbols and abbreviations C -capacitance; C Z -equivalent capacitance; d A , D A -duty ratio and its steady-state value; f S -switching frequency; f (with other subscripts) -characteristic frequencies; G -load conductance; G A -equivalents conductance defined by Eq. 39; H (with subscripts) -small-signal transmittances of converter; L -inductance; M I -current static transmittance in DCM; Q -coefficient in H t (s) dependence; R -load resistance; R (with subscripts) -parasitic resistances; R Z -equivalent parasitic resistance; SW1, SW2 -ideal semiconductor switches; T S -switching period; θ -small-signal representations of duty ratio in s-domain; ω (with subscripts) -characteristic pulsations; CCM -continuous conduction mode; DCM -discontinuous conduction mode.

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Pole-Zero-Cancellation Technique for DC-DC Converter

Cited by 4 publications

References 8 publications

Identification and Compensation for D-Dot Measurement System in Transient Electromagnetic Pulse Measurement

Identification and Compensation for D-Dot Measurement System in Transient Electromagnetic Pulse Measurement

Design of a Takagi–Sugeno Fuzzy Exact Modeling of a Buck–Boost Converter

Characteristic frequencies in averaged description of step-down (BUCK) DC-DC power converter

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