A new contactiess power pick-up with continuous variable inductor control using magnetic amplifier

Hsu, Jhih-Da; Hu, Aiguo Patrick; Swain, Akshya; Dai, Xin; Sun, Yue

doi:10.1109/icpst.2006.321556

Cited by 23 publications

(16 citation statements)

References 4 publications

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“…A unique feature of the controller is it is able to achieve a full range tuning so variations in V OC , the tuning capacitor etc. can all be compensated, giving a stable constant output voltage to the secondary load [8]. However, similar to all other types of discrete controllers, selection of the sampling time and step size of the variable inductor will influence the response speed and accuracy of the controller.…”

Section: Proposed Directional Tuning Controlmentioning

confidence: 98%

“…It should be noted that dashed lines between decision blocks are the tuning direction changing logic. With this logic the controller can improve its performance at the region close to the desired voltage by intelligently changing the tuning direction without taking any extra heuristic step [8].…”

Section: Proposed Directional Tuning Controlmentioning

confidence: 99%

“…The intention of the proposed control method is to compensate for the variation of V OC by tuning/detuning the pick-up circuit. A magnetic amplifier (mag-amp) L S1 is used as a variable inductor for tuning and detuning pick-up from the primary operating frequency [8]. The controller shown in Fig.…”

Section: Proposed Directional Tuning Controlmentioning

confidence: 99%

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Power Flow Control of a 3-D Wireless Power Pick-up

Hsu

et al. 2007

2007 2nd IEEE Conference on Industrial Electronics and Applications

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A variable inductor based power flow control method is proposed to regulate the output voltage of a wireless power pick-up. The open circuit voltage variation of the power pick-up is compensated by controlling a magnetic amplifier type inductor in an LCL tuning configuration. The proposed control algorithm directly detects the output voltage of the power pick-up and feedbacks the voltage signal to update the tuning direction truth table discretely. According to the output voltage, the controller determines the direction of the equivalent inductance change of the magnetic amplifier. Both simulation and practical results demonstrated that the proposed control algorithm can effectively maintain the output voltage at a desired value after a short period of transient response. It has been found that the step-size of the variable inductor and sampling time are two key factors governing the control quality. These two parameters were selected based on the tolerance of the output voltage variation and the desired control speed.

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Section: Proposed Directional Tuning Controlmentioning

confidence: 98%

Section: Proposed Directional Tuning Controlmentioning

confidence: 99%

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Power Flow Control of a 3-D Wireless Power Pick-up

Hsu

et al. 2007

2007 2nd IEEE Conference on Industrial Electronics and Applications

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“…The working principle of SC is by switching a semiconductor device through hysteresis or PWM control such that the average current flowing into the load can be controlled to obtain a desired constant output voltage. However, since the shorting current constantly flows through the switch, it causes power losses to the system and therefore lowers the overall efficiency of the power pick-up particularly under light loading conditions [4,11]. Apart from the decreased secondary power efficiency, the ambient temperature rise caused by the heat generated from the power dissipation of the switch may also be a problem for some applications such as biomedical implants, as it may lead to tissue damage [12].…”

Section: Introductionmentioning

confidence: 97%

Implicit adaptive controller for wireless power pickups

Hsu

Swain

2011

2011 6th IEEE Conference on Industrial Electronics and Applications

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An implicit generalized minimum variance type adaptive controller has been designed for regulating the output voltage of a wireless power pick-up. The parameters of this controller are directly estimated without explicitly identifying system parameters and therefore it offers significant advantages over explicit type adaptive controllers requiring process parameter estimation. The performance of this controller has been illustrated via simulations. Results of simulation under various conditions demonstrate that the proposed controller can achieve full-range tuning control and successfully regulate the output voltage under system parameter variations.

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“…Its working principle is similar to the dynamic tuning/detuning control technique. However, instead of using the traditional PI controller to perform the tracking process, it uses the present and previous control results to determine the correct tracking direction in the next step, and retune the circuit to deliver the required power (Hsu et al, 2006). Such an approach covers the full-tuning curve, so dualside (full-range) control can be achieved.…”

Section: Powermentioning

confidence: 99%