Emi Consideration of High Reliability Dc-Dc Converter: In Aerospace Based Electric Transport System Charger Application

Rahimi, Tohid; Hosseini, Seyed Hossein; Sabahi, Mehran; Alishah, Rasoul Shalchi

doi:10.2528/pierm15112504

Cited by 14 publications

(6 citation statements)

References 21 publications

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“…Besides, EMI comes from the switching action of the power devices [10]. The high values of current surge di/dt and voltage variation dv/dt come from the switching actions are mainly responsible for the different mode (DM) noise and common mode (CM) noise respectively [11]. These noises interfere with the stability of other devices that share the common direct current (DC) bus, especially for those highly N 0885-8993 (c) 2018 IEEE.…”

mentioning

confidence: 99%

A DDS-Based Wait-Free Phase-Continuous Carrier Frequency Modulation Strategy for EMI Reduction in FPGA-Based Motor Drive

Chen

Yang

Long

et al. 2019

IEEE Trans. Power Electron.

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In AC motor drives, the fixed-frequencies harmonic components of output voltage and current from the inverter with fixed frequency pulse width modulation (FFPWM) usually lead to electromagnetic interference (EMI). The spread spectrum clock generation (SSCG) is a widely used solution of this problem. Adjusting the switching frequency to reduce EMI is one kind of practicable scheme among SSCG methods. How to design an optimal or suitable modulation profile is a research emphasis of scholars and has been discussed in depth in many literatures. However, apart from modulation profile, the mode and quality of carrier are also important and can be improved. In most frequency modulation methods, due to the limitation of the conventional carrier generation mode, the implementation of the new frequency instruction has to wait to the termination of the last switching period. In order to eliminate the waiting state and design a simpler algorithm, this paper has proposed a wait-free phase-continuous carrier frequency modulation strategy (WPCFM) by combining the direct digital frequency synthesizer (DDS) theory and proper temporal planning of control interruptions. Besides, theoretical analysis of WPCFM including quantization error, frequency jitter, phase delay and voltage distortion have been finished. Moreover, compared with conventional methods, a more convenient, feasible and simpler field-programmable gate array (FPGA) based algorithm implementation method and the control structure of WPCFM are also introduced. Analysis shows that, although WPCFM causes a slight increase of the current ripple, it can solve the partial frequency nonuniform distribution problem of conventional method and it has potential value of applications in the wide band gap (WBG) motor drive systems. The effectiveness of the WPCFM is verified by several sets of EMI reduction experiments where classical periodic carrier frequency modulations are applied. 1

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mentioning

confidence: 99%

A DDS-Based Wait-Free Phase-Continuous Carrier Frequency Modulation Strategy for EMI Reduction in FPGA-Based Motor Drive

Chen

Yang

Long

et al. 2019

IEEE Trans. Power Electron.

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“…With this method, the switching loss can be reduced and the switching frequency is dispersed. Therefore, the EMI noise can be spread within a wider range of frequency and the peak value of harmonics can be suppressed [27, 29, 30].…”

Section: 3‐l Vsf‐pwm With Np Balancementioning

confidence: 99%

Switching frequency variation based on current ripple analysis of a 3‐L PMSM drive system considering neutral point balance

Zhao

Wang

Liu

et al. 2020

IET Power Electronics

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The output current ripple of the three-level (3-L) inverter is important to the performance of the 3-L permanent magnetic synchronous motor (PMSM) drive system, but the neutral point (NP) balance for the 3-L T-type inverter is not considered in the analysis of current ripple up to this point. The NP balance algorithms change the current ripple distribution and it is necessary to develop novel methods for current ripple analysis. In this study, the sinusoidal pulse width modulation with zero-order voltage injection and virtual space vector PWM (VSV-PWM) are utilised to balance the NP potential of the 3-L inverter in the PMSM drive system. The analytical methods of current ripple under these two modulation methods are proposed and the effects of these two NP balance methods on the output current ripple are investigated, respectively. Based on the analysis of current ripple, two variable switching frequency PWM (VSF-PWM) methods considering the NP balance are proposed. The proposed VSF-PWM methods can not only reduce the switching loss but also suppress the electromagnetic interference noise while keeping the NP potential balanced. Especially, the proposed variable switching frequency VSV-PWM (VSF-VSV-PWM) can effectively alleviate the intrinsic problem of high switching loss of VSV-PWM.

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“…According to the obtained triangular functions, the MTTF functions of the converters can be extracted through Figures 6-8. By referring to Equation (9) and (10), and Figure 5a, the fuzzy curve of the failure rate for each single switch in the parallel-switch and standby-switch configurations are obtained. The results are shown in Figure 6a,b (for standby and parallel switches in the single-phase mode, respectively), Figure 7a,b (for standby and parallel switches in the two-phase mode, respectively), and Figure 8a,b (for standby and parallel switches in the single-phase mode respectively).…”

Section: Redundant-switch Configurationmentioning

confidence: 99%

“…On the other hand, MOSFETs offer high frequency switching which improve the dynamics of the converters [8,9]. Nevertheless, the high switching frequency leads to high dv/dt and increases power loss and electromagnetic emissions [10]. Despite their features, the two mentioned power switches suffer from a high failure rate.…”

Section: Introductionmentioning

confidence: 99%

Fuzzy-Logic-Based Mean Time to Failure (MTTF) Analysis of Interleaved Dc-Dc Converters Equipped with Redundant-Switch Configuration

et al. 2018

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Interleaved dc-dc converters in sensitive applications necessitate an enhanced reliability. An interleaved converter equipped with redundant components can fulfill the reliability requirements. Mean Time to Failure (MTTF), as a reliability index, can be used to evaluate the expected life span of the mentioned converters. The Markov model is a helpful tool to calculate the MTTF in such systems. Different scientific reports denote different failure rates with different weight for power elements. Also, in reliability reports, failure rates of active and passive components are uncertain values. In order to approximate the failure rates fuzzy-logic-based Markov models are proposed in this paper. Then it is used to evaluate the MTTF of an interleaved multi-phase dc-dc converter, which is equipped with parallel and standby switch configurations. For the first time, fuzzy curves for MTTFs of the converters and 3D reliability function are derived in this paper. The reliability analyses give an insight to find the appropriate redundant-switch configurations for interleaved dc-dc converters under different conditions. Simulation and experimental results are provided to lend credence to the viability of the studied redundant-switch configurations in interleaved dc-dc boost converter.

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Emi Consideration of High Reliability Dc-Dc Converter: In Aerospace Based Electric Transport System Charger Application

Cited by 14 publications

References 21 publications

A DDS-Based Wait-Free Phase-Continuous Carrier Frequency Modulation Strategy for EMI Reduction in FPGA-Based Motor Drive

A DDS-Based Wait-Free Phase-Continuous Carrier Frequency Modulation Strategy for EMI Reduction in FPGA-Based Motor Drive

Switching frequency variation based on current ripple analysis of a 3‐L PMSM drive system considering neutral point balance

Fuzzy-Logic-Based Mean Time to Failure (MTTF) Analysis of Interleaved Dc-Dc Converters Equipped with Redundant-Switch Configuration

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