Internal resistance is currently one of the most effective ways to achieve the performance improvement, control optimization, and on-line fault diagnosis of fuel cells. In the fuel cell internal resistance test (FCIRT) system (FCIRTS), the alternating current (AC) disturbance signal is mainly achieved through the use of DC/DC converters or other expensive program-controlled equipments, which are expensive and large, and it is not conducive to the commercial application of low-cost FCIRTS. In particular, for the fuel cell vehicles based on dual-source motors, the DC/DC structure is cancelled. Therefore, a new method should be used in the FCIRTS. To solve this problem, a low-cost fuel cell AC disturbance signal control approach based on MOSFET high-speed switch was proposed in this paper. In the approach, a circuit model of MOSFET high-speed regulation was built, and the AC control of the fuel cells was achieved finally by simulation analysis and experimental verification. The proposed approach can not only independently control the AC components, but also save the system space and cost because of reducing reliance on DC/DC converters and dedicated equipments. Therefore, it is of great value to the development of low-cost, high-precision, and real-time FCIRTS.

中文翻译：

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基于MOSFET高速开关的燃料电池交流扰动信号控制方法

内阻是目前实现燃料电池性能提升、控制优化和在线故障诊断的最有效途径之一。在燃料电池内阻测试（FCIRT）系统（FCIRTS）中，交流（AC）扰动信号主要是通过使用DC/DC转换器或其他昂贵的程控设备来实现的，这些设备价格昂贵且体积庞大，并且不利于低成本FCIRTS的商业应用。特别是对于基于双源电机的燃料电池汽车，取消了DC/DC结构。因此，FCIRTS 中应该使用一种新方法。针对这一问题，本文提出了一种基于MOSFET高速开关的低成本燃料电池交流干扰信号控制方法。在办法中，建立了MOSFET高速调节电路模型，通过仿真分析和实验验证，最终实现了燃料电池的交流控制。所提出的方法不仅可以独立控制交流组件，而且由于减少了对 DC/DC 转换器和专用设备的依赖，还可以节省系统空间和成本。因此，对于开发低成本、高精度、实时的FCIRTS具有重要价值。