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| 移相全桥变换器在电动汽车充电单元中的应用 |
| Application of phase-shift full-bridge converter to charging unit for electric vehicle |
| 投稿时间：2016-01-06 |
| DOI：10.13259/j.cnki.eri.2018.02.009 |
| 中文关键词: 电动汽车 充电单元 峰值电流模式 移相全桥 |
| 英文关键词:electric vehicle charging unit peak current mode phase-shift full-bridge |
| 基金项目: |
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| 中文摘要: |
| 分析了峰值电流控制模式下移相全桥变换器的工作原理，设计了电动汽车充电单元的串联双闭环控制器。该控制器外环主回路实时获取负载电压与输入参考电压之间的偏差，通过输入PID电压环对输出电压进行调节，其内环副回路实时计算原边控制电流与PID电压环控制输出的偏差，通过输入PID电流环对控制电流进行调节。针对当控制输入信号占空比大于50%后峰值电流变换器系统出现不稳定的问题，设计了一种斜坡补偿方法，并以PIC16F887单片机为核心，开发了一套电动汽车充电控制单元。实验结果表明，所设计的充电控制单元可以满足电动汽车的充电要求，并具有可靠性高、动态响应快、补偿网络易实现以及带宽增益较高等优点。 |
| 英文摘要: |
| The principle of phase-shift full-bridge converter based on peak current mode was described. A double closed-loop controller for the charging unit of electric vehicle was designed. In its outer main loop, real-time deviation between load voltage and input reference voltage was obtained to regulate the output voltage by the input PID voltage loop. And in its inner secondary loop, real-time deviation between primary control current and output current of PID voltage control loop was computed to regulate the control current by the input PID current loop. The instability problem of peak current converter existed when the duty cycle of control signal exceeded 50%. The slope compensation method was proposed. The charging unit of electric vehicle was developed based on PIC16F887 microcontroller. Experimental results showed that the developed charging unit could well satisfy the charging requirements of electric vehicle. Besides, it had the advantages with high stability, fast dynamic response, high gain bandwidth, and easy achievement of compensation network. |
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