CAJ | 학술논문

为了有效地评估和预测功率变换器中磁元件的磁芯损耗，将反映磁芯一个励磁周期内损耗的动态磁滞回线以椭圆回线等效，推导出了无直流偏磁工况下脉宽调制(pulse width modulation，PWM)波形励磁的磁芯损耗模型。采用差值损耗测量思想，以DC/AC逆变电路作为测试电路，测量了直流偏磁及PWM波励磁下的磁芯损耗。进一步根据直流偏磁下磁芯损耗的测量结果及其特征的分析，构思了以磁芯基本磁化曲线模型为基础的直流偏磁和 PWM 波励磁下的磁芯损耗模型。最后，对比了测试数据和所提出的模型的计算结果，验证了模型的正确性。
위료유효지평고화예측공솔변환기중자원건적자심손모，장반영자심일개려자주기내손모적동태자체회선이타원회선등효，추도출료무직류편자공황하맥관조제(pulse width modulation，PWM)파형려자적자심손모모형。채용차치손모측량사상，이DC/AC역변전로작위측시전로，측량료직류편자급PWM파려자하적자심손모。진일보근거직류편자하자심손모적측량결과급기특정적분석，구사료이자심기본자화곡선모형위기출적직류편자화 PWM 파려자하적자심손모모형。최후，대비료측시수거화소제출적모형적계산결과，험증료모형적정학성。
In order to evaluate and predict the core losses of magnetics in power converters, by equivalently replacing the dynamic B-H loop which surrounding area reflects the core losses in a magnetizing cycle period with an elliptical loop, the model of magnetics core losses under the PWM excitation without DC bias was derived. The core losses of magnetics under both DC bias and PWM excitations using a DC/AC inverter as the test circuit were measured by differential loss test idea. By the analysis of the core loss test results and their characteristics, a new core loss model considering the effects of both DC bias and PWM excitations was conceived based on the basic B-H curve. Finally, the test results were compared with the proposed model and the model accuracy was verified.