摘要
Buck/Boost双向DC/DC变换器在电动车电机驱动系统和车载充电系统中具有重要的应用前景。为实现该变换器控制与驱动电机的协同控制,提出了一种采用低成本数字控制芯片STM32F103实现Buck/Boost双向DC/DC变换器数字控制的方法,并进行了变换器设计和试验研究。研究结果表明,在电压外环和电流内环的双闭环控制策略下,该变换器可以满足稳态运行控制,以及参考电压突变和负载突变模式下的动态运行控制。采用数字控制的方式有望使得DC/DC变换器的控制与电机的控制能共享控制器资源,有利于实现它们在控制方法上的耦合,进一步提升电动车电机驱动系统控制的灵活度。
The Buck/Boost bidirectional DC-DC converter has important application prospects in the electric vehicle motor drive system and on-board battery charging system. To achieve the coordinated control of DC-DC converter and drive motor,a low-cost digital control chip STM32 F103 based digital control method was applied for controlling the Buck/Boost bidirectional DC-DC converter. The converter design and experimental testing results were also provided. The experimental results show that the converter can be controlled stably with the current inner loop and voltage outer loop based dual closed-loop control strategy,both at the steady state operation case and dynamic operation cases like reference voltage mutation and load mutation. Thus,with the proposed digital control method,it is expected to enable DC-DC converter control and motor control to share controller resources,which is beneficial to realize the coupling of their control methods and further enhance the flexibility of the control of electric vehicle motor drive system.
引文
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