Abstract:This research investigates a complex n order cascading circuit network with embedded horizontal bridge circuits with the N-RT method. The contents of the study include equivalent resistance analytical formula and complex impedance characteristics of the circuit network. The research idea is as follows. Firstly the equivalent model of n-order resistance network is established, and a fractional difference equation model is derived using Kirchhoff’s law. Secondly, the equivalent transformation method is employed … Show more
“…Looking more closely at the relative difference ΔR/R between the estimate given by equation (15) and the numerical result (figure 5), the accuracy of the estimate increases rapidly as a function of n, reaching the numerical accuracy for n 10. The correction terms depending on n, beyond the dominant 1/n term, therefore quickly become negligible as n increases.…”
Section: Estimates Of the Other Tprs In The N-braceletmentioning
confidence: 83%
“…In the case of the n-bracelet, we can easily do better than the estimates in equation (15), because with equation (11) we have the exact expression of R 0n as a function of n and b. For n = 3, we simply have R 03 = (1 + 2b)/(3 + 2b), which we could see directly as a resistor 1 twice in parallel with a resistor 1 + 2b.…”
Section: Explicit Solutions Of the Layer-to-layer Resistance For Low ...mentioning
confidence: 99%
“…Dedicated methods have subsequently been developed to study extended RNs, such as Laplacian matrix methods [8], electrical images [9] or the transfer matrix approach [10]. In addition to numerical methods, three-dimensional RNs of increasing complexity are now routinely analysed using powerful exact methods based on lattice green functions [11,12] or the rapidly developing Recursive Transform method of Tan and co-workers [13][14][15]. In parallel with these achievements, physicists returned to neglected basic networks.…”
Resistor networks, used to model new types of natural or artificial matter, also provide generic examples for practising the methods of physics for obtaining estimates, revealing the main properties of a system and deriving exact expressions. Symmetric bracelet resistor networks are constructed by connecting n identical resistors in a circle, and then connecting two such circles by another set of n identical resistors. First, using van Steenwijk’s method, we establish that the equivalent resistance or two-point resistance (TPR) between any two nodes are derived when the layer-to-layer resistance R0n is known. We then determine R0n by an elementary recurrence relation which converges rapidly to its large n limit. Using this reference value of R0n, accurate estimates of other TPRs follow for all values of n, characterised by a leading 1/n variation. In addition, exact explicit expressions of the TPRs can be calculated for any value of n. These networks, prototypes of three-dimensional networks considered in research, can be used to illustrate the diversity of the physical approach, the efficiency of elementary methods, and to learn to be comfortable with approximations. Easy to make and use for experimental tests, they can support hands-on activities and conceptual changes.
“…Looking more closely at the relative difference ΔR/R between the estimate given by equation (15) and the numerical result (figure 5), the accuracy of the estimate increases rapidly as a function of n, reaching the numerical accuracy for n 10. The correction terms depending on n, beyond the dominant 1/n term, therefore quickly become negligible as n increases.…”
Section: Estimates Of the Other Tprs In The N-braceletmentioning
confidence: 83%
“…In the case of the n-bracelet, we can easily do better than the estimates in equation (15), because with equation (11) we have the exact expression of R 0n as a function of n and b. For n = 3, we simply have R 03 = (1 + 2b)/(3 + 2b), which we could see directly as a resistor 1 twice in parallel with a resistor 1 + 2b.…”
Section: Explicit Solutions Of the Layer-to-layer Resistance For Low ...mentioning
confidence: 99%
“…Dedicated methods have subsequently been developed to study extended RNs, such as Laplacian matrix methods [8], electrical images [9] or the transfer matrix approach [10]. In addition to numerical methods, three-dimensional RNs of increasing complexity are now routinely analysed using powerful exact methods based on lattice green functions [11,12] or the rapidly developing Recursive Transform method of Tan and co-workers [13][14][15]. In parallel with these achievements, physicists returned to neglected basic networks.…”
Resistor networks, used to model new types of natural or artificial matter, also provide generic examples for practising the methods of physics for obtaining estimates, revealing the main properties of a system and deriving exact expressions. Symmetric bracelet resistor networks are constructed by connecting n identical resistors in a circle, and then connecting two such circles by another set of n identical resistors. First, using van Steenwijk’s method, we establish that the equivalent resistance or two-point resistance (TPR) between any two nodes are derived when the layer-to-layer resistance R0n is known. We then determine R0n by an elementary recurrence relation which converges rapidly to its large n limit. Using this reference value of R0n, accurate estimates of other TPRs follow for all values of n, characterised by a leading 1/n variation. In addition, exact explicit expressions of the TPRs can be calculated for any value of n. These networks, prototypes of three-dimensional networks considered in research, can be used to illustrate the diversity of the physical approach, the efficiency of elementary methods, and to learn to be comfortable with approximations. Easy to make and use for experimental tests, they can support hands-on activities and conceptual changes.
“…In this area, some attempts have been made to derive analytical expressions to compute a few electrical characteristics. Tan et al 25,26 used the variable substitution method to calculate the equivalent impedance of an LC network. Using a nonlinear differential equation, Chen et al 27 calculated the equivalent impedance for a two‐terminal trapezoidal complex impedance network with few parameters.…”
Summary
Most electrical systems are represented as ladder networks made up of resistances, inductances and capacitances. Electrical characteristics of these networks, such as voltages, currents and equivalent impedance, are difficult to compute because they require solving multiple differential‐algebraic equations. Further, circuit simulator‐based modelling is a time‐consuming and tedious process for simulating large networks with multiparameters present in various configuration. This paper presents generalised analytical formulae for computing the electrical properties of any multiparameter arbitrary section homogenous ladder network that can be reduced to series and shunt impedances. Circuit principles, chain matrix decomposition and linear transformation are used to derive the symbolic expressions. Simply plugging the values of the series and shunt impedances, as well as the number of sections, into the derived expression yields the impedance. Thereafter, the calculated impedances can be used to calculate the nodal voltages and mesh currents. Simulation results of a six‐section homogeneous ladder network are presented and compared with those of other existing techniques to validate the derived expressions. The derived expressions eliminate the need for recursive relations, complex integro‐differential equations, large state‐space matrices and simulator‐based circuit modelling, which are all clearly advantageous.
“…For example, in the literature [39,40], equivalent circuits can be used to study the reflection and refraction of electromagnetic waves of the superstructure grating, while reference [41] uses complex impedance circuits to study water transport in plants. At present, researchers have accomplished many achievements in research by using the N-RT method [42][43][44][45][46][47][48][49]. This paper intends to study a class of a generalized 2 × n circuit network model, which is different from previous models in that the resistance on the middle axis is independent of the resistance on the upper and lower boundaries as shown in figure 1.…”
Any changes of resistor conditions will affect the difficulty of resistor network research. This paper considers a new model of a generalized 2×n resistor network with an arbitrary intermediate axis that was previously unsolved. We investigate the potential function and equivalent resistance of the 2×n resistor network using the RT-I theory. The RT-I method involves four main steps: 1) establishing difference equations on branch currents, 2) applying matrix transform to study the general solution of the differential equation, 3) obtaining current analysis of each branch according to the boundary constraints, and 4) deriving the potential function of any node of the 2×n resistor network by matrix transformation, and the equivalent resistance formula between any nodes. The article concludes with a discussion of a series of special results, comparing and verifying the correctness of the conclusions. The research work of this paper establishes a theoretical basis for related scientific research and application.
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