Abstract
This paper proposes comprehensive and simplified numerical design procedures for the class-E switching circuits with the Particle Swarm Optimization (PSO) algorithm. The PSO algorithm does not require approximate solutions and partial differentiation derivations. Therefore, the proposed design method has higher convergence stability than Newton’s method-based design. It is also a feature that the PSO algorithm allows the mismatch between the design condition and the design parameter numbers. As a design example, we successfully draw the multiple design curves of the class-E amplifier and frequency multipliers by one-time optimization execution with the modified PSO algorithm. Besides, we show a pretty simple design procedure of the class-E amplifier, which uses only one evaluation function for determining three design parameters. The design accuracy of the proposed design method does not deteriorate compared with the previous design method. We carried out circuit experiments, which achieved power-conversion efficiency of 94.0%. The circuit experiment showed agreement with numerical predictions, which confirmed the validity and usefulness of the proposed design method.
Highlights
H IGH frequency amplifiers have been used in a wide range of applications, such as wireless power transfer (WPT) systems [1]–[5], resonant power converters [6]– [13], and induction heating [14], [15]
By utilizing the features of the Particle Swarm Optimization (PSO) algorithm, the proposed design method does not rely on the initial values or partial differentiation of the evaluation function
Two design examples are denoted in this paper: Section IV proposes a comprehensive design of the class-E amplifier and rectifiers based on the modified PSO algorithm
Summary
H IGH frequency amplifiers have been used in a wide range of applications, such as wireless power transfer (WPT) systems [1]–[5], resonant power converters [6]– [13], and induction heating [14], [15]. Author et al.: Preparation of Papers for IEEE TRANSACTIONS and JOURNALS is necessary to derive analytical equations with hard effort according to the amplifier and the frequency multiplier types individually despite the same circuit topology. This paper proposes comprehensive and simplified numerical design procedures of the class-E switching circuits with a heuristic optimization algorithm. By utilizing the features of the PSO algorithm, the proposed design method does not rely on the initial values or partial differentiation of the evaluation function. We can derive the component values satisfying the class-E ZVS/ZDS conditions by setting only one evaluation function: power-conversion efficiency. Though the computation algorithm and evaluation functions are straightforward, the design accuracy does not deteriorate compared to Newton’s method-based designs. Two design examples are denoted in this paper: Section IV proposes a comprehensive design of the class-E amplifier and rectifiers based on the modified PSO algorithm.
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