The current-pulse load is generally characterized by wide frequency band and pulse variation,when it is directly connected to the power supply bus.The load power is presented as the instantaneous power.In order to bal...The current-pulse load is generally characterized by wide frequency band and pulse variation,when it is directly connected to the power supply bus.The load power is presented as the instantaneous power.In order to balance the instantaneous power difference between the pulse load and the DC bus,a bi-directional DC/DC converter is usually connected in parallel to compensate for the current fluctuation caused by the characteristics of the pulse load.However,there is a large current spike in the bus current in the pre-stage when the pulse load is changed between light and heavy load.In this paper,a three-state dual-inductance bi-directional converter is proposed.In addition,the load current waveform is directly used to control the inductive branch switches,and an adaptive current feedback control strategy based on the valley voltage loop is proposed to control the power switches.The control method is applicable to the arbitrary change of the frequency and power of the pulse load.Finally,the experimental results show that the threestate dual-inductance bi-directional converter not only eliminates excessive bus current spikes,but also improves the transient response of the three-port power supply system.展开更多
为了解决单原边绕组双输入反激变换器主功率管在开关过程中存在电流尖峰的问题,在详细分析了变换器工作原理的基础上,提出了改进方法并进行了仿真验证,仿真结果表明电流尖峰得到了有效抑制。采用TMS320F28335作为控制芯片,设计了具有限...为了解决单原边绕组双输入反激变换器主功率管在开关过程中存在电流尖峰的问题,在详细分析了变换器工作原理的基础上,提出了改进方法并进行了仿真验证,仿真结果表明电流尖峰得到了有效抑制。采用TMS320F28335作为控制芯片,设计了具有限流保护功能的双环控制系统。通过一台功率为120 W,工作频率为100 k Hz的样机验证了电路设计和控制方案的正确性。展开更多
基金This work was supported by the National Natural Science Foundation of China under Grant 61601378the Sichuan Science and Technology Program under Grant 2019YJ0237Foundation of Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle,Ministry of Education.
文摘The current-pulse load is generally characterized by wide frequency band and pulse variation,when it is directly connected to the power supply bus.The load power is presented as the instantaneous power.In order to balance the instantaneous power difference between the pulse load and the DC bus,a bi-directional DC/DC converter is usually connected in parallel to compensate for the current fluctuation caused by the characteristics of the pulse load.However,there is a large current spike in the bus current in the pre-stage when the pulse load is changed between light and heavy load.In this paper,a three-state dual-inductance bi-directional converter is proposed.In addition,the load current waveform is directly used to control the inductive branch switches,and an adaptive current feedback control strategy based on the valley voltage loop is proposed to control the power switches.The control method is applicable to the arbitrary change of the frequency and power of the pulse load.Finally,the experimental results show that the threestate dual-inductance bi-directional converter not only eliminates excessive bus current spikes,but also improves the transient response of the three-port power supply system.
文摘为了解决单原边绕组双输入反激变换器主功率管在开关过程中存在电流尖峰的问题,在详细分析了变换器工作原理的基础上,提出了改进方法并进行了仿真验证,仿真结果表明电流尖峰得到了有效抑制。采用TMS320F28335作为控制芯片,设计了具有限流保护功能的双环控制系统。通过一台功率为120 W,工作频率为100 k Hz的样机验证了电路设计和控制方案的正确性。
