Design and Research on DC Electric Leakage Protection Circuit Breaker
Abstract
:1. Introduction
2. System Overview
3. Characteristic Modeling and Preparation of Nano Two-Phase Magnetic Materials
4. Design of DC Leakage Sensor
4.1. Leakage Current Detection of Single-Winding Single-Core Fluxgate
4.2. Chip Design
- (1)
- PGA: The programmable gain adjustment module, is used to adjust the sensor gain without manually adjusting the resistance, which can be modified by programming.
- (2)
- Temp sensor: Temperature compensation module, temperature calibration, used to compensate for the phenomenon of the leakage current.
- (3)
- Sensor Array: Sensing excitation detection arrays, generating excitation, while detecting signals after the magnetic core coupled.
- (4)
- COMM: Communication interface, read data onto external communication, and the program burning.
- (5)
- Output Drive: Output drivers, output drivers, increase the output current of the module, so that the sensor output is more stable.
- (6)
- P-Vref: Adjustable reference voltage output, programmable reference, adjustment reference voltage value (sensor V-ref is automatically adjusted, can be 2.5 V or 1.25 V, etc.).
- (7)
- OTP: Disposable programmable module.
- (8)
- DSP: Digital signal processor, arithmetic unit, its main application is real-time, quickly realize various digital signal processing algorithms.
5. DC Leakage Protection Circuit Breaker Simulation and Experiment
6. Conclusions
- (1)
- When the nano two-phase magnetic material is characterized by permanent magnetic characteristics, the magnetic induction intensity of the operating mechanism of intelligent/energy-saving DCCB leakage protection circuit breaker is 1.5 T, reaching a stable pull-in state.
- (2)
- When the DC leakage sensor reaches 10%, the response time is 520 μs and when it reaches 90%, the response time is 990 μs. Therefore, it can be judged that the equipment can make the leakage outlet mechanism act quickly to achieve the purpose of leakage protection.
- (3)
- The smooth implementation of this paper provides a new idea about the product development of energy-saving DCCB.
Author Contributions
Funding
Conflicts of Interest
References
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Temperature Range/°C | Current Range/A | Voltage Range/A | Measured Current/A | Sample 1 /V | Sample 2 /V | Sample 3 /V | Sample 4 /V | Sample 5 /V |
---|---|---|---|---|---|---|---|---|
25 | 0.03 | 2.6 | 0.03004 | 2.5964 | 2.6087 | 2.6069 | 2.6051 | 2.5977 |
25 | 0.06 | 2.7 | 0.0599 | 2.6969 | 2.7105 | 2.7088 | 2.7067 | 2.6985 |
25 | 0.3 | 3.5 | 0.29972 | 3.4987 | 3.5313 | 3.5238 | 3.5185 | 3.4994 |
25 | 0.6 | 4.5 | 0.59967 | 4.4989 | 4.5317 | 4.5278 | 4.5247 | 4.4994 |
25 | 0 | 2.5 | 0 | 2.4982 | 2.5079 | 2.5054 | 2.5058 | 2.4979 |
25 | −0.03 | 2.4 | −0.03003 | 2.3955 | 2.404 | 2.4023 | 2.4015 | 2.3951 |
25 | −0.03 | 2.3 | −0.0599 | 2.2949 | 2.3024 | 2.3003 | 2.3001 | 2.2947 |
25 | −0.3 | 1.5 | −0.29974 | 1.4915 | 1.4786 | 1.4837 | 1.4865 | 1.4935 |
25 | −0.6 | 0.5 | −0.59969 | 0.4909 | 0.4623 | 0.4665 | 0.475 | 0.4913 |
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Hou, L.; Chen, D.; Li, T.; Zhao, M.; Ren, H. Design and Research on DC Electric Leakage Protection Circuit Breaker. Energies 2022, 15, 5605. https://doi.org/10.3390/en15155605
Hou L, Chen D, Li T, Zhao M, Ren H. Design and Research on DC Electric Leakage Protection Circuit Breaker. Energies. 2022; 15(15):5605. https://doi.org/10.3390/en15155605
Chicago/Turabian StyleHou, Lei, Dezhi Chen, Tongfei Li, Ming Zhao, and Huaibo Ren. 2022. "Design and Research on DC Electric Leakage Protection Circuit Breaker" Energies 15, no. 15: 5605. https://doi.org/10.3390/en15155605
APA StyleHou, L., Chen, D., Li, T., Zhao, M., & Ren, H. (2022). Design and Research on DC Electric Leakage Protection Circuit Breaker. Energies, 15(15), 5605. https://doi.org/10.3390/en15155605