To boost the dynamic performance of the full-bridge (FB) dc–dc converter, some model-based controls have been recently proposed in the literature. However, in terms of dynamic performance, these methods have failed to reveal the potential of this converter since the inherent relationship among the duty ratio, the input voltage, the output voltage, and the load resistor is not adopted in the controller, and the dynamic performances are still relayed on the fuzzy adjustment based on the disturbances of output voltage as the single-voltage-loop control method. In this article, based on this inherent characteristic of the FB dc–dc converter, an accurate transferred current modulation method is presented first. Based on this modulation method, a simple direct current control (DCC) scheme is proposed for a fast dynamic response with the feedback values of input voltage and load current. Moreover, the model uncertainties such as the power losses and control delay may influence the control performance. Therefore, a compensation operation is also presented to reduce the impact caused by these uncertainties to ensure the dynamic performance of the proposed strategy. In addition, since the circuit parameters including the leakage inductance and the output capacitor should be employed to implement the proposed DCC strategy with compensation operation, inaccurate circuit parameters may influence the performance of these proposed strategies. Therefore, the circuit-parameter estimation methods for these two circuit parameters are also proposed to ensure the dynamic performance of the FB dc–dc converter. Finally, the simulation and experiment results have verified the correctness and effectiveness of the proposed DCC strategy.

中文翻译：

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一种带补偿操作和电路参数估计的全桥DC-DC变换器直流控制方案

为了提高全桥 (FB) dc-dc 转换器的动态性能，最近在文献中提出了一些基于模型的控制。然而，在动态性能方面，由于控制器中没有采用占空比、输入电压、输出电压和负载电阻之间的内在关系，这些方法未能揭示该转换器的潜力。性能仍然依靠基于输出电压扰动的模糊调节作为单电压环控制方法。在本文中，基于 FB dc-dc 转换器的这一固有特性，首先提出了一种精确的转移电流调制方法。基于这种调制方式，提出了一种简单的直流控制 (DCC) 方案，以实现具有输入电压和负载电流反馈值的快速动态响应。此外，功率损耗和控制延迟等模型不确定性可能会影响控制性能。因此，还提出了一种补偿操作，以减少这些不确定性造成的影响，以确保所提出策略的动态性能。此外，由于应采用包括漏电感和输出电容器在内的电路参数来实施具有补偿操作的建议 DCC 策略，因此不准确的电路参数可能会影响这些建议策略的性能。所以，还提出了针对这两个电路参数的电路参数估计方法，以确保 FB dc-dc 转换器的动态性能。最后，仿真和实验结果验证了所提出的DCC策略的正确性和有效性。