DC-DC converter control using IP controller

Vasanthakumar, Deepika; Srikanth,

doi:10.1109/iccpeic.2014.6915373

Cited by 12 publications

(6 citation statements)

References 4 publications

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“…So, the open loop T.F of the outer voltage system is given as (28). Figure 7 shows the control blocks for the outer voltage control loop of the PFC boost converter using the PI controller.…”

Section: Design Of the Outer Voltage Loopmentioning

confidence: 99%

“…by substituting from (28) and (29) in (30) gives the closed loop T.F of the outer voltage control loop as expressed in (31).…”

Section: Design Of the Outer Voltage Loopmentioning

confidence: 99%

“…This paper presents the small signal stability modeling of the conventional PFC boost converter proposed, and based on the signal stability model, an optimal integral-proportional (IP) current controller consists of double loop control strategy, where the integral gain feed forward to return the inductor current back to the reference set point, and the proportional gain implemented in the feedback path to increase the controller response. IP controller usually used in the control circuits of the DC-DC converters and the DC motor drive systems [25][26][27], as compared with the PI controller, the IP controller have less overshoot and fast dynamic response [28]. So, IP current controller with fast dynamic response has been designed to let the inductor current track the reference current, removing the total distortion occurred around the zero-crossing point and increase the power factor.…”

Section: Introductionmentioning

confidence: 99%

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Optimal IP Current Controller Design Based on Small Signal Stability for THD Reduction of High-Power Density PFC Boost Converter

Okilly¹,

Baek²

2020

Preprint

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This paper presents an optimal design for the inner current control loop of the continuous current conduction mode (CCM) power factor correction (PFC) stage, which it can be used as the front stage of the two stages alternating current-direct current (AC-DC) telecom power supply. Conventional single-phase CCM-PFC boost converter usually implemented with using of the proportional-integral (PI) controllers in both of the voltage and current control loops, to regulate the output DC voltage to the specified value, moreover to maintains the input current follows the input voltage which offers converter with high power factor (P.F) and low current total harmonic distortion (THD). However, due to the slow dynamic response of the PI controller at the zero-crossing point of the input supply current, input current can’t fully follow the input voltage which leads to high THD. Digitally controlled PFC converter with an optimal design of the inner current control loop using doubly control loops IP controller to reduce the THD and to offer input current with unity P.F was performed in this paper. Furthermore, for the economic design of the digitally control PFC converter, two isolated AC and DC voltage sensors are proposed and designed for the interfacing with the microcontroller unit (MCU). PSIM software was used to test the converter performance with using the proposed designed current controllers and isolated voltage sensors. High power density digitally controlled telecom PFC stage with P.F of about 99.93%, full load efficiency of about 98.70% and THD less 5.50% is achieved in this work.

show abstract

Section: Design Of the Outer Voltage Loopmentioning

confidence: 99%

“…by substituting from (28) and (29) in (30) gives the closed loop T.F of the outer voltage control loop as expressed in (31).…”

Section: Design Of the Outer Voltage Loopmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optimal IP Current Controller Design Based on Small Signal Stability for THD Reduction of High-Power Density PFC Boost Converter

Okilly¹,

Baek²

2020

Preprint

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show abstract

“…The reference voltage and the measured voltage are given as inputs to the comparator, from which an error signal is passed as input to the integral proportional (IP) controller. The use of the IP controller enhances the system dynamic response and reduces undesirable peak overshoot compared to the proportional integral (PI) controller [38]. The IP controller generates the control signal based on the error signal.…”

Section: Controller Designmentioning

confidence: 99%

Implementation of a Single-Phase SST for the Interface between a 13.2 kV MVAC Network and a 750 V Bipolar DC Distribution

Yun

Jeong

Kim³

et al. 2018

Electronics

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This paper presents the implementation of a single-phase solid-state transformer (SST) for the interface between a 13.2 kV medium voltage alternative current (MVAC) network and a 750 V bipolar DC distribution. The SST has ten cascaded subunits in consideration of the device rating and modulation index (MI). Each subunit consists of an AC/DC stage and a DC/DC stage with a high frequency isolated transformer (HFIT). The AC/DC stage consists of cascaded H-bridges (CHBs) to cope with the MVAC. The DC/DC stage employs a triple active bridge (TAB) converter for bipolar DC distribution. Topology analysis and controller design for this specific structure are discussed. In addition, the insulation of HFIT used in DC/DC converters is also discussed. A simple balancing controller at the AC/DC stage and a current sharing controller at the DC/DC stage are used to prevent DC-link voltage unbalance caused by the cascaded structure. The discussions are validated using a 150 kW single-phase 21-level SST prototype at the laboratory level.Electronics 2018, 7, 62 2 of 19 gate bipolar transistor (IGBT) packages for high-voltage and low-current application, and Ref.[12] presented a 3.3 kV 300 kVA back-to-back three-phase SST prototype for universal and flexible power management. In Ref.[13], a 15 kV 1.2 MVA single-phase SST prototype was designed for a railway grid. These prototypes have different structures depending on the purpose of use. In other words, the SST prototypes were designed to be suitable for specific applications.This paper introduces a single-phase 150 kW prototype of an SST for the connection between a 13.2 kV MVAC grid and a bipolar 750 V DC distribution system. This SST prototype consists of an AC/DC stage and a DC/DC stage. The AC/DC stage employs the CHB rectifiers and is responsible for power factor control, voltage regulation, and the voltage balancing of DC-links. The DC/DC stage employs a specially designed TAB converter for connecting to the bipolar DC distribution system. In addition, it is responsible for voltage control, and current sharing in parallel-connected outputs. This paper also discusses the insulation of the HFIT used in the TAB converter.The rest of this paper is organized as follows: the overall structure of the SST system used in this paper is briefly introduced in Section 2. Section 3 provides the details about the controller of AC/DC stage for the voltage balancing of DC-links. In Section 4, the DC/DC stage is analyzed including the characteristics of the topology, modeling, and controller design. In Section 5, the HFIT design for high-voltage insulation is discussed. The simulations and experimental results using a 150 kW SST prototype are presented in Sections 6 and 7, respectively. Finally, the conclusions are provided in Section 8.

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“…Based on the signal stability model, the optimal integral-proportional (IP) current controller consists of a double-loop control strategy, where the integral gain feedforward returns the inductor current to the reference set point, and the proportional gain implemented in the feedback path increases the controller response. The IP controller is usually used in the control circuits of DC/DC converters and DC motor drive systems [25][26][27]. Compared with the PI controller, the IP controller has less overshoot and a fast-dynamic response [27].…”

Section: Introductionmentioning

confidence: 99%

Optimal IP Current Controller Design Based on Small Signal Stability for THD Reduction of a High-Power-Density PFC Boost Converter

2021

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This paper presents an optimal design for the inner current-control loop of the continuous current conduction mode (CCM) power factor correction (PFC) stage, which can be used as the front stage of the two-stage AC/DC telecom power supply. The conventional single-phase CCM-PFC boost converter is implemented with proportional–integral (PI) controllers in both the voltage and current-control loops to regulate the output DC voltage to the specified value and to ensure the input current follows the input voltage, which offers a converter with a high-power factor (PF) and low current total harmonic distortion (THD). However, due to the slow dynamic response of the PI controller at the zero-crossing point of the input supply current, the input current cannot fully follow the input voltage, which leads to high THD. In this paper, we investigate a digitally controlled PFC converter with an optimally designed inner current-control loop using a doubly-fed control loops integral-proportional (IP) controller to reduce the THD and to offer an input current with a unity PF. For the economic design of a digitally controlled PFC converter, two isolated AC and DC voltage sensors are designed for interfacing with the microcontroller unit (MCU). PSIM software as well as experimental prototype was used to test the converter performance using the proposed designed current controllers and isolated voltage sensors. We achieved a high-power-density, digitally controlled, telecom PFC stage with a power factor more than 99% and THD of about 5.50%.

show abstract

DC-DC converter control using IP controller

Cited by 12 publications

References 4 publications

Optimal IP Current Controller Design Based on Small Signal Stability for THD Reduction of High-Power Density PFC Boost Converter

Optimal IP Current Controller Design Based on Small Signal Stability for THD Reduction of High-Power Density PFC Boost Converter

Implementation of a Single-Phase SST for the Interface between a 13.2 kV MVAC Network and a 750 V Bipolar DC Distribution

Optimal IP Current Controller Design Based on Small Signal Stability for THD Reduction of a High-Power-Density PFC Boost Converter

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