A Maximum Efficiency Point Tracking Control Scheme Based on Different Cross Coupling of Dual-Receiver Inductive Power Transfer System

Abstract

Abstract:One of the most promising inductive power transfer applications is the wireless power supply for locomotives which may cancel the need for pantographs. In order to meet the dynamic and high power demands of wireless power supplies for locomotives, a relatively long transmitter track and multiple receivers are usually adopted. However, during the dynamic charging, the mutual inductances between the transmitter and receivers vary and the load of the locomotives also changes randomly, which dramatically affects the system efficiency. A maximum efficiency point tracking control scheme is proposed to improve the system efficiency against the variation of the load and the mutual inductances between the transmitter and receivers while considering the cross coupling between receivers. Firstly, a detailed theoretical analysis on dual receivers is carried out. Then a control scheme with three control loops is proposed to regulate the receiver currents to be the same, to regulate the output voltage and to search for the maximum efficiency point. Finally, a 2 kW prototype is established to validate the performance of the proposed method. The overall system efficiency (DC-DC efficiency) reaches 90.6% at rated power and is improved by 5.8% with the proposed method under light load compared with the traditional constant output voltage control method.

Opportunities and Challenges for Near-Field Wireless Power Transfer: A Review

“…Array coil [67] MIMO-coils [80] Four-coils [15, 62-64, 81, 111-115] Dual Tx & Rx [83] Domino coil [66] Five-coils [119] Two-coils [12,[116][117][118] LC-LC circuit [82] SIMO-coils [120] Conformal bumper [124] Single-switch-Single-diode [84 ] Double-Sided LCLC [85] Parallel discs [122,123] Hexagonal cell array [131] Matrix charging pad [130] Single plate [125][126][127][128][129] Two flat rectangular Tx-Rx [87] Single Tx-single Rx [33,69,[91][92][93][94][95][96][97][98][99][100][101][102][103][104][105] Multi-Rx [76,106] Rectangular [78] MRC CC Circular [78] Hexagonal [78] YZ & XZ plane [121] Single ...…”

“…Recently, Mai et al [76] proposed a maximum power-point tracking control system to enhance system efficiency against the changes of the mutual inductances between the receivers and transmitter coils as well as the inductive load of the locomotives. A 2000 W proposed prototype is implemented to confirm the system performance.…”

Single-Tube and Multi-Turn Coil Near-Field Wireless Power Transfer for Low-Power Home Appliances

“…However, one of the main limitations of IPT systems, such as the traditional single receiver, is the difficulty in handling heavy load requirements. Therefore, the multiple-receiver approach may be a promising solution to the long-distance demands of wireless charging applications [8].…”

A Novel Single-switch Phase Controlled Wireless Power Transfer System

“…Active rectifiers are initially put forward to reduce the conduction losses of the diode rectifier and transfer the power bi-directionally [12][13][14][15][16][17][18][19]. Recently, Phase Control (PC) method is introduced to regulate resonant currents [20][21][22][23][24][25], which can further reduce the energy consumed by parasitic resistances.…”

“…Active rectifiers proposed for WPT systems can be classified into three categories: (i) full bridge rectifier with four switches; (ii) semi-bridgeless rectifier with two switches; and (iii) single-switch rectifier. Full active bridge rectifiers are used in various applications [12][13][14][15][16][17][18][19][20][21][22][23][24][25]. Four Metal-Oxide- 2…”