A Novel IPT System Based on Dual Coupled Primary Tracks for High Power Applications

Abstract

Generally, a single phase H-bridge converter feeding a single primary track is employed in conventional inductive power transfer systems. However, these systems may not be suitable for some high power applications due to the constraints of the semiconductor switches and the cost. To resolve this problem, a novel dual coupled primary tracks IPT system consisting of two high frequency resonant inverters feeding the tracks is presented in this paper. The primary tracks are wound around an E-shape ferrite core in parallel which enhances the magnetic flux around the tracks. The mutual inductance of the coupled tracks is utilized to achieve adjustable power sharing between the inverters by configuring the additional resonant capacitors. The total transfer power can be continuously regulated by altering the pulse width of the inverters' output voltage with the phase shift control approach. In addition, the system's efficiency and the control strategy are provided to analyze the characteristic of the proposed IPT system. An experimental setup with total power of 1.4kW is employed to verify the proposed system under power ratios of 1:1 and 1:2 with a transfer efficiency up to 88.7%. The results verify the performance of the proposed system.

A Novel WPT System Based on Dual Transmitters and Dual Receivers for High Power Applications: Analysis, Design and Implementation

“…Moreover, the voltages are identical with each other by employing Synchronous control technology [16,20], as shown in Figure 5. The fundamental voltage phasor of inverters can be derived as: According to mutual coupling theories, the relationships between the currents and the voltages can be described following the Kirchhoff's voltage law (KVL):…”

“…Moreover, the voltages are identical with each other by employing Synchronous control technology [16,20], as shown in Figure 5. The fundamental voltage phasor of inverters can be derived as:…”

“…The resonant frequencies are changed due to the magnetic coupling among the transmitters, which dramatically decrease the transfer efficiency. A novel WPT topology based on dual coupled transmitters is proposed in [20]. By configuring the additional compensation capacitors, resonant inverters with different power ratings can be connected in parallel to achieve a high power transfer.…”

“…Some approaches using multiple transmitters to power a single receiver have been investigated in [18][19][20][21]. There is an increase in gain of the transmitted power due to the increase number of transmitters.…”

Circulating Current Reduction Strategy for Parallel-Connected Inverters Based IPT Systems

“…Nevertheless, the modulation method of the control signal is some kind of complexities and the dynamic performance was not discussed. For the magnetic field enhancement method, a novel IPT topology based on dual coupled transmitters is proposed in [19,20]. By configuring the additional compensation capacitors, resonant inverters with different power ratings can be connected in parallel to achieve the high power transfer.…”