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PCBロゴスキーコイルによる出力電流センシング用エンベロープトラッキング方法と三相インバータでのフィードバック制御への適用
https://doi.org/10.18997/0002000938
https://doi.org/10.18997/0002000938d29c851f-be15-430c-b0c0-7aa2f042767f
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
sei_k_477.pdf (7.5 MB)
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| Item type | 学位論文 = Thesis or Dissertation(1) | |||||||
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| 公開日 | 2024-09-02 | |||||||
| 資源タイプ | ||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_db06 | |||||||
| 資源タイプ | doctoral thesis | |||||||
| タイトル | ||||||||
| タイトル | PCB Rogowski Coil Envelope Tracking Method for Output Current Sensing and Its Application to Feedback Control in a Three-Phase Inverter | |||||||
| 言語 | en | |||||||
| タイトル | ||||||||
| タイトル | PCBロゴスキーコイルによる出力電流センシング用エンベロープトラッキング方法と三相インバータでのフィードバック制御への適用 | |||||||
| 言語 | ja | |||||||
| 言語 | ||||||||
| 言語 | eng | |||||||
| 著者 |
Bayarkhuu Battuvshin,
× Bayarkhuu Battuvshin,
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| 抄録 | ||||||||
| 内容記述タイプ | Abstract | |||||||
| 内容記述 | A net-zero future is one of the most important goals of our society. As the world’s population grows, we need a new approach to energy that is more sustainable. Researchers are competing to find new solutions for the looming climate crisis and the leaders of the developed nations are committing to reducing their greenhouse gas emissions by 40 to 60 percent by 2030. Power electronics is a key technology for achieving the future with reduced CO2 emissions and increased energy efficiency. It has many applications in areas such as electric vehicles (EVs), renewable energy systems, and power transmission. However, there are remaining challenges such as power density and cost. Current sensors contribute to energy efficient system designs and enable the ability to control power electronics systems. Hall effect sensor and current transformers are commonly used to measure low frequency output current of power converters however, they too face challenges such as cost, size and speed that need to be tackled by new technologies. Previously, the Rogowski printed circuit board (PCB) sensor has been proposed to reduce cost and increase power density of the power converters. The PCB sensor is an excellent fit for space limited applications except it is inapplicable for the measurement of low frequency output current of converters. This study proposes a current measurement method with combination of integrator and sample and hold circuit (S/H) complementing the PCB sensor. This complete analog current reproduction circuit is configured to measure switching current of the three-phase inverter from the inverter inputs and reproduces the low frequency output current. This approach solves the cost and size problem of conventional sensors. Additionally, the method is experimentally proven for measuring low frequency output current. The high sensitivity of the sensor in the high-frequency range is ideal for switching current measurement of converter systems. Then, sensor output is integrated and sampled at the switching instant to represent output current. There were reproduction errors in the three-phase current measurement due to the short time duration between two consecutive switching events. We introduced mitigation methods to suppress mentioned error appearance in current reproduction. The measurement method is implemented in a three-phase insulated-gate bipolar transistor (IGBT) inverter and successfully reproduces the output current with a single PCB sensor inserted between a 6-in-1 IGBT power module and DC-link capacitor, operating under a switching frequency of 3.5–7.0 kHz and output current of 6 A with DC-link voltage of 150 V. This thesis work uncovers the details of the current reproduction method and is structured as follows. Chapter 1 provides an overview of the power electronics technology and its various applications that require current sensors. It also introduces the general types of current sensors and their advantages and disadvantages. Chapter 2 focuses on the Rogowski coil PCB current sensor and its design aspects. It presents the equivalent circuit of the sensor and analyzes its components, such as mutual inductance, self-inductance, shield layer to wire capacitance, and so on. Their effect on the sensor’s performance and accuracy are also considered. Furthermore, comparison of LTSpice simulation and experimental results on transient and AC analysis is made. Chapter 3 introduces the principle and implementation of envelope tracking method. One of the challenges in current measurement is to accurately capture the dynamic changes of the switching current, especially in applications that involve high frequency switching or modulation. A novel technique that addresses this challenge is called “envelope tracking”, which tracks the envelope of the current waveform and converts it into a proportional voltage signal. This chapter also discusses the sources and effects of current measurement errors in both single-phase and three-phase systems and proposes strategies to mitigate them. Chapter 4 explains the circuit implementation of the envelope tracking method in detail. The envelope tracking method that we introduced in the third chapter is based on a purely analog circuit design that does not require any digital signal processing. This makes it easy to integrate with existing power electronics systems and achieve high-speed and high-accuracy performance. The chapter describes the three main components of the circuit. First, the integrator and S/H circuits that amplify, integrate, and capture the envelope voltage signal from the PCB sensor. Then, the level shifter circuit generates the reference signals for sampling and resetting the integrator and S/H circuits. Lastly, the sample and reset trigger generator consists of simple logic elements and RC components. In chapter 5, experimental setup and procedure are presented, and the results and analysis of the current measurement and control performance are shown. In order to demonstrate the effectiveness and applicability of the envelope tracking method, we are conducting experiments on two types of inverters that are a single-phase inverter and a three-phase inverter. We used a single PCB sensor and complementary analog circuits to measure the current waveform and provide feedback control to the inverter. Chapter 6 details about limitations of the envelope tracking method for output current measurement. Chapter 7 concludes the research on single PCB sensor current measurement for three-phase inverter. This dissertation presents a novel application of a single PCB current sensor measurement in three phase inverter systems and its control. The research results demonstrate the feasibility of integrating the current sensor in the power module with reliable current measurement. Therefore, the PCB current sensor measurement with the envelope tracking method is an innovation that can significantly enhance the efficiency and the power density of power electronics system in EVs and renewables. As the technology leads to a net-zero future, power electronics can reap the benefits of the PCB current sensor. |
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| 目次 | ||||||||
| 内容記述タイプ | TableOfContents | |||||||
| 内容記述 | 1 BACKGROUND AND OBJECTIVE| 2 PCB “ROGOWSKI COIL” CURRENT SENSOR| 3 CURRENT MEASUREMENT METHOD| 4 CIRCUIT IMPLEMENTATIONS| 5 EXPERIMENTAL RESULTS| 6 LIMITATIONS OF THE ENVELOPE TRACKING METHOD| 7 CONCLUSIONS | |||||||
| 備考 | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | 九州⼯業⼤学博⼠学位論⽂ 学位記番号：生工博甲第477号 学位授与年⽉⽇: 令和6年3⽉25⽇ | |||||||
| 学位授与番号 | ||||||||
| 学位授与番号 | 甲第477号 | |||||||
| 学位名 | ||||||||
| 学位名 | 博士（工学） | |||||||
| 学位授与年月日 | ||||||||
| 学位授与年月日 | 2024-03-25 | |||||||
| 学位授与機関 | ||||||||
| 学位授与機関識別子Scheme | kakenhi | |||||||
| 学位授与機関識別子 | 17104 | |||||||
| 言語 | ja | |||||||
| 学位授与機関名 | 九州工業大学 | |||||||
| 学位授与年度 | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | 令和5年度 | |||||||
| 出版タイプ | ||||||||
| 出版タイプ | VoR | |||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||
| アクセス権 | ||||||||
| アクセス権 | open access | |||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||
| ID登録 | ||||||||
| ID登録 | 10.18997/0002000938 | |||||||
| ID登録タイプ | JaLC | |||||||
