| Summary: | 碩士 === 南台科技大學 === 電機工程系 === 98 === In order to save energy and reducing costs of the burn-in test of the power supplies, a single-phase ac electronic load with energy recycling is proposed. The input current of the AC/DC converter is controlled through the current controller to track the reference current that can be simulated as the characteristic of the RLC load and nonlinear load. The output current of the DC/AC inverter is controlled by the inner current controller to feedback energy to the grid network with low harmonic distortion and unity power factor sinusoidal waveform. For balancing the energy of the proposed tested system, the dc voltage of the DC/AC inverter is adopted an outer dc voltage controller to control and stabilize the dc bus voltage between the AC/DC converter and DC/AC inverter. The operated frequency of tested ac power sources can be different with grid network, therefore, the proposed tested system is more flexible to use in the burn-in test. Finally, a 1kVA experimental prototype is built to demonstrate the performance of the proposed technique.
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