ADC Quantization Effects in Two-Loop Digital Current Controlled DC-DC Power Converters: Analysis and Design Guidelines
This paper analyzes the presence of undesired quantization-induced perturbations (QIP) in a dc-dc buck-boost converter using a two-loop digital current control. This work introduces design conditions regarding control laws gains and signal quantization to avoid the quantization effects due to the ad...
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MDPI AG
2020-10-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/20/7179 |
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| author | Catalina González-Castaño Carlos Restrepo Roberto Giral Enric Vidal-Idiarte Javier Calvente |
| author_facet | Catalina González-Castaño Carlos Restrepo Roberto Giral Enric Vidal-Idiarte Javier Calvente |
| author_sort | Catalina González-Castaño |
| collection | DOAJ |
| description | This paper analyzes the presence of undesired quantization-induced perturbations (QIP) in a dc-dc buck-boost converter using a two-loop digital current control. This work introduces design conditions regarding control laws gains and signal quantization to avoid the quantization effects due to the addition of the outer voltage loop in a digital current controlled converter. The two-loop controller is composed of a multisampled average current control (MACC) in the inner current-programmed loop and a proportional-integrator compensator at the external loop. QIP conditions have been evaluated through simulations and experiments using a digitally controlled pulse width modulation (DPWM) buck-boost converter. A 400 V 1.6 kW proof-of-concept converter has been used to illustrate the presence of QIP and verify the design conditions. The controller is programmed in a digital signal controller (DSC) TMS320F28377S with a DPWM with 8.96-bit equivalent resolution, a 12-bit ADC for current sampling, and a 12-bit ADC for voltage sampling or a 16-bit ADC for voltage error sampling. |
| first_indexed | 2024-03-10T15:36:11Z |
| format | Article |
| id | doaj.art-31649995b5704ca08bd70350f5eefe2c |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T15:36:11Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-31649995b5704ca08bd70350f5eefe2c2023-11-20T17:09:31ZengMDPI AGApplied Sciences2076-34172020-10-011020717910.3390/app10207179ADC Quantization Effects in Two-Loop Digital Current Controlled DC-DC Power Converters: Analysis and Design GuidelinesCatalina González-Castaño0Carlos Restrepo1Roberto Giral2Enric Vidal-Idiarte3Javier Calvente4Departament d’Enginyeria Electrònica, Elèctrica i Automàtica, Escola Tècnica Superior d’Enginyeria, Universitat Rovira i Virgili, 43007 Tarragona, SpainDepartment of Electromechanics and Energy Conversion, Universidad de Talca, Curicó 3340000, ChileDepartament d’Enginyeria Electrònica, Elèctrica i Automàtica, Escola Tècnica Superior d’Enginyeria, Universitat Rovira i Virgili, 43007 Tarragona, SpainDepartament d’Enginyeria Electrònica, Elèctrica i Automàtica, Escola Tècnica Superior d’Enginyeria, Universitat Rovira i Virgili, 43007 Tarragona, SpainDepartament d’Enginyeria Electrònica, Elèctrica i Automàtica, Escola Tècnica Superior d’Enginyeria, Universitat Rovira i Virgili, 43007 Tarragona, SpainThis paper analyzes the presence of undesired quantization-induced perturbations (QIP) in a dc-dc buck-boost converter using a two-loop digital current control. This work introduces design conditions regarding control laws gains and signal quantization to avoid the quantization effects due to the addition of the outer voltage loop in a digital current controlled converter. The two-loop controller is composed of a multisampled average current control (MACC) in the inner current-programmed loop and a proportional-integrator compensator at the external loop. QIP conditions have been evaluated through simulations and experiments using a digitally controlled pulse width modulation (DPWM) buck-boost converter. A 400 V 1.6 kW proof-of-concept converter has been used to illustrate the presence of QIP and verify the design conditions. The controller is programmed in a digital signal controller (DSC) TMS320F28377S with a DPWM with 8.96-bit equivalent resolution, a 12-bit ADC for current sampling, and a 12-bit ADC for voltage sampling or a 16-bit ADC for voltage error sampling.https://www.mdpi.com/2076-3417/10/20/7179dc-dc power convertermultisampled average current control (MACC)digital controllimit-cycle oscillation (LCO)quantization-induced perturbations (QIP) |
| spellingShingle | Catalina González-Castaño Carlos Restrepo Roberto Giral Enric Vidal-Idiarte Javier Calvente ADC Quantization Effects in Two-Loop Digital Current Controlled DC-DC Power Converters: Analysis and Design Guidelines Applied Sciences dc-dc power converter multisampled average current control (MACC) digital control limit-cycle oscillation (LCO) quantization-induced perturbations (QIP) |
| title | ADC Quantization Effects in Two-Loop Digital Current Controlled DC-DC Power Converters: Analysis and Design Guidelines |
| title_full | ADC Quantization Effects in Two-Loop Digital Current Controlled DC-DC Power Converters: Analysis and Design Guidelines |
| title_fullStr | ADC Quantization Effects in Two-Loop Digital Current Controlled DC-DC Power Converters: Analysis and Design Guidelines |
| title_full_unstemmed | ADC Quantization Effects in Two-Loop Digital Current Controlled DC-DC Power Converters: Analysis and Design Guidelines |
| title_short | ADC Quantization Effects in Two-Loop Digital Current Controlled DC-DC Power Converters: Analysis and Design Guidelines |
| title_sort | adc quantization effects in two loop digital current controlled dc dc power converters analysis and design guidelines |
| topic | dc-dc power converter multisampled average current control (MACC) digital control limit-cycle oscillation (LCO) quantization-induced perturbations (QIP) |
| url | https://www.mdpi.com/2076-3417/10/20/7179 |
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