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首页> 外文期刊>IEEE Transactions on Industrial Electronics >Design and Evaluation of a Low-Cost High-Performance $ Sigma$–$Delta$ ADC for Embedded Control Systems in Induction Heating Appliances
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Design and Evaluation of a Low-Cost High-Performance $ Sigma$–$Delta$ ADC for Embedded Control Systems in Induction Heating Appliances

机译：用于感应加热设备嵌入式控制系统的低成本高性能$ Sigma $ – $ Delta $ ADC的设计和评估

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摘要

The advantages of resonant power converters, such as high efficiency and high power density, make them a suitable solution for domestic applications such as induction heating (IH) cookers. The control systems of these appliances require performing accurate and smooth power control while assuring the safety of the power devices. In order to accomplish these tasks, it is necessary to have information about the target output power, which is selected by the user, and the specific parameters of the output current. In this paper, a single-bit second-order sigma–delta ($Sigma$– $Delta$) analog-to-digital converter (ADC) is proposed to measure the magnitude of interest in resonant power converters. An optimized digital low-pass filter architecture is proposed to extract the output current from the digitized bit stream. This filter improves the accuracy while having low logic-resource consumption. The proposed ADC has been verified using a resonant inverter applied to the IH cooktop application. The inverter switching frequency is in the range of 40–80 kHz. A statistical analysis of the final measurement system has been performed to assess the system accuracy. The proposed system achieves good accuracy in the inverter operating range.
机译：谐振功率转换器的优点（例如高效率和高功率密度）使其成为家用应用（例如感应加热（IH）炊具）的合适解决方案。这些设备的控制系统需要执行准确而平稳的电源控制，同时还要确保电源设备的安全性。为了完成这些任务，有必要获得有关用户选择的目标输出功率以及输出电流的特定参数的信息。本文提出了一种单比特二阶sigma-delta（$ Sigma $-$ Delta $）模数转换器（ADC），以测量谐振功率转换器中的关注幅度。提出了一种优化的数字低通滤波器架构，以从数字化比特流中提取输出电流。该滤波器在降低逻辑资源消耗的同时提高了精度。提议的ADC已使用应用于IH灶具应用的谐振逆变器进行了验证。逆变器的开关频率在40–80 kHz的范围内。已对最终测量系统进行了统计分析，以评估系统的准确性。所提出的系统在逆变器操作范围内实现了良好的精度。

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