Sensitivity Analysis and Parameter Optimization of Inductive Power Transfer

Abstract

There are several resonance frequencies points in the high-order resonant network to realize constant current/constant voltage output, but the disturbance of the resonant network parameters will affect the output characteristics of the system. Therefore, selecting the appropriate resonant frequency is necessary to achieve stable output characteristics of wireless power transmission. This paper analyzes the influence of sensitivity of the double-sided LCC compensation network parameters on resonance point and output characteristics. Moreover, this paper proposes a design method to realize load-independent constant current and constant voltage output under two ZPA frequencies, and the resonance parameters are optimized for the realization of ZVS. Under constant current and constant voltage output resonant points, the transmission efficiency of the double-sided LCC IPT system reaches 88.9% and 88.5%, respectively.

Implementation of ZVS for Double-Sided LCC Inductive Coupled Wireless Power Transfer System Under Constant Current/Constant Voltage Operation Mode

“…Therefore, the compensation network parameters satisfy equations ( 22) and (24), and the ZPA at the CV operating frequency can be realized. The parameters of the compensation network satisfy the formula (23), and the Ttype two-port cascade equivalent of the system realizing CV output is shown in Figure 5(a). The parameters of the compensation network satisfy the formula (24), and the equivalent cascade of the T-type two-port network for the system to achieve CV output is in Figure 5(a).…”

“…The selection of CC and CV operating frequency of a double-sided LCC compensation network is described in detail in the paper [23] and will not be repeated here. Figure 6 shows the change of the series compensation capacitor to the CV operating frequency and the input impedance angle when the series compensation capacitor fluctuates in the range of 0.9-1.1 times the theoretically calculated value.…”

“…The double-sided LCC compensation network has three constant current operating frequency points and four constant voltage operating frequency points. The author's paper analyzed how to select appropriate CC/CV operating frequency points [23], so this paper will not repeat it. The input voltage is 200V, and the input phase angle of the system is capacitive under the CV working frequency.…”

“…The output performance is analyzed for the parameter offset of the series compensation capacitor, and the optimal capacitor configuration method is put forward on this basis, improving the anti-offset system performance [22]. The output sensitivity of constant current and constant voltage in the double-sided LCC compensation network at different operating frequencies is analyzed, and a parameter optimization method for compensation capacitors is proposed [23]. However, the influence of parameter disturbance of parallel compensation capacitors in doublesided LCC compensation networks on system characteristics and the acceptable range of parameter fluctuation of compensation capacitors for ZVS is not considered.…”