EPE Association: EPE 2005 - Topic 05-3b - DS: Converter control, current/voltage control

EPE 2005 - Topic 05-3b - DS: Converter control, current/voltage control
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2005 - Conference > EPE 2005 - Topic 05: MODULATION STRATEGIES AND SPECIFIC CONTROL METHODS FOR STATIC CONVERTERS > EPE 2005 - Topic 05-3b - DS: Converter control, current/voltage control

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   A Novel Control Method of Boost and Buck-Boost Converters with a Hysteretic PWM Controller
By SATO Terukazu; NABESHIMA Takashi; YOSHIDA Shinichi [View]
[Download]

Abstract: A new control method for boost and buck-boost converters employing a hysteretic PWM controller is presented. The triangular voltage obtained from a simple RC network connected to an auxiliary winding of the inductor is superimposed to the output voltage and fed to a hysteretic comparator as a feedback signal. The presented control method provides no steady-state error voltage on the output and excellent dynamic performances for the variations of the input voltage and the load current.

   Adaptive Control Schemes for Stabilizing Switching Frequency of Sliding Mode Controlled Power Converters
By LAI Yu; TSE Chi Kong; TAN Sie [View]
[Download]

Abstract: A major disadvantage of applying sliding mode control to power converters is that the steady-state switching frequency is affected by line and load variations. This is undesirable as it complicates the input and output filters’ design. A possible solution is to incorporate adaptive control schemes into the controller. This paper presents a thorough investigation into the problem and solution. Experimentalresults confirm that the adaptive control schemes are capable of reducing switching frequency variations.

   Design of PWM based Sliding Mode Voltage Controller for DC-DC Converters Operating in Continuous Conduction Mode
By TAN Sie; TSE Chi Kong; LAI Yu [View]
[Download]

Abstract: This paper presents a simple approach to the design of fixed-frequency pulse-width-modulation based sliding mode voltage controller for DC–DC converters operating in continuous conduction mode. The design methodology is illustrated on the three basic DC–DC converters: buck, boost, and buck-boost converters.

   Experimental Study of Instabilities in Two Parallel-Connected Boost Converters under Current Mode Control
By PJEVALICA Velibor; IU Herbert [View]
[Download]

Abstract: DC-DC converters operating in parallel have been proved to have dynamics different from that of a single converter. In this paper, Hopf bifurcation is investigated for a system of two boost converters operating in prallel under current mode control. Although two converters operating in parallel increase the efficiency of the system, if the control parameters are not chosen properly, the system becomes unstable and starts to oscillate.

   Fuzzy state feedback controller tuning for dc/dc converter
By FAUCHER JeRoMe; MAUSSION Pascal [View]
[Download]

Abstract: Although linear state feedback control is a classical scheme for converter control, fuzzy state feedback is rather rare but efficient. Nevertheless, there is no simple and efficient method for tuning. This paper presents a new, simple and robust method for the tuning of fuzzy feedback controllers with the help of experimental designs. There is no need of any adaptive procedure and system model, the number of parameters is reduced with respect to classical fuzzy controllers. This strategy is successfully applied to a type of dc/dc converter that have an under damped behaviour during step input response and hard parameters sudden variations.

   High Frequency Generator for an Inductive Shrinking Unit
By WALTER Julio; MARTINEZ J.; GUZMAN ViCtor Manuel; CEGLIA Gerardo; DEDE Enrique; GIMENEZ MariA; ESTEVE Vicente; MILLAN Antonio [View]
[Download]

Abstract: This work presents the design and tests of a low power (10 kW), medium frequency (100 kHz), inductive heating system, to provide energy to a shrinking unit dedicated to replace the mechanical tool-holders used at present in different machine-tools. The tool holder is a solid ring, which is expanded by the inductive heater to change tools, and cooled to shrink it, holding the tool with a bigger force than the standard mechanical units.The power generator works in resonance, the power switches operate in zero current switching mode (ZCS), and the power control operates in a modified Delta mode also known as Pulse Density Control. The power output is continually controlled from 10\% to a 100\% of maximum, and is regulated against external factors such as variations in input voltage, temperature, and different tool holder sizes and shapes.

   Investigating stability of a single inductor current mode controlled dual switching DC-DC converter
By BENADERO Luis; MORENO Vanessa [View]
[Download]

Abstract: Conditions for avoiding subharmonic oscillations and even a chaotic dynamics in a dual dc-dc converter are presented in this paper. The power stage operates with only an inductor, whose current determines the control operation. Under high frequency switching conditions, an approximated one-dimensional map for the current is obtained, taking into account the general occurrence of two asynchronous switching during each cycle.

   Using Integral Reconstructor for Nonlinear-Controlled Boost Converter
By LEYVA Ramon; ARTEAGA Maria Isabel; MARTINE [View]
[Download]

Abstract: In this paper, a passivity- based control is applied to a boost converter using integral reconstructors to observe the inductor current. The resulting controller only uses the capacitor output voltage and an input signal representing the switch position. The regulator large-signal stability is also demonstrated.

EPE 2005 - Topic 05-3b - DS: Converter control, current/voltage control
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2005 - Conference > EPE 2005 - Topic 05: MODULATION STRATEGIES AND SPECIFIC CONTROL METHODS FOR STATIC CONVERTERS > EPE 2005 - Topic 05-3b - DS: Converter control, current/voltage control
	[return to parent folder]

	A Novel Control Method of Boost and Buck-Boost Converters with a Hysteretic PWM Controller By SATO Terukazu; NABESHIMA Takashi; YOSHIDA Shinichi	[View] [Download]
Abstract: A new control method for boost and buck-boost converters employing a hysteretic PWM controller is presented. The triangular voltage obtained from a simple RC network connected to an auxiliary winding of the inductor is superimposed to the output voltage and fed to a hysteretic comparator as a feedback signal. The presented control method provides no steady-state error voltage on the output and excellent dynamic performances for the variations of the input voltage and the load current.

	Adaptive Control Schemes for Stabilizing Switching Frequency of Sliding Mode Controlled Power Converters By LAI Yu; TSE Chi Kong; TAN Sie	[View] [Download]
Abstract: A major disadvantage of applying sliding mode control to power converters is that the steady-state switching frequency is affected by line and load variations. This is undesirable as it complicates the input and output filters’ design. A possible solution is to incorporate adaptive control schemes into the controller. This paper presents a thorough investigation into the problem and solution. Experimentalresults confirm that the adaptive control schemes are capable of reducing switching frequency variations.

	Design of PWM based Sliding Mode Voltage Controller for DC-DC Converters Operating in Continuous Conduction Mode By TAN Sie; TSE Chi Kong; LAI Yu	[View] [Download]
Abstract: This paper presents a simple approach to the design of fixed-frequency pulse-width-modulation based sliding mode voltage controller for DC–DC converters operating in continuous conduction mode. The design methodology is illustrated on the three basic DC–DC converters: buck, boost, and buck-boost converters.

	Experimental Study of Instabilities in Two Parallel-Connected Boost Converters under Current Mode Control By PJEVALICA Velibor; IU Herbert	[View] [Download]
Abstract: DC-DC converters operating in parallel have been proved to have dynamics different from that of a single converter. In this paper, Hopf bifurcation is investigated for a system of two boost converters operating in prallel under current mode control. Although two converters operating in parallel increase the efficiency of the system, if the control parameters are not chosen properly, the system becomes unstable and starts to oscillate.

	Fuzzy state feedback controller tuning for dc/dc converter By FAUCHER JeRoMe; MAUSSION Pascal	[View] [Download]
Abstract: Although linear state feedback control is a classical scheme for converter control, fuzzy state feedback is rather rare but efficient. Nevertheless, there is no simple and efficient method for tuning. This paper presents a new, simple and robust method for the tuning of fuzzy feedback controllers with the help of experimental designs. There is no need of any adaptive procedure and system model, the number of parameters is reduced with respect to classical fuzzy controllers. This strategy is successfully applied to a type of dc/dc converter that have an under damped behaviour during step input response and hard parameters sudden variations.

	High Frequency Generator for an Inductive Shrinking Unit By WALTER Julio; MARTINEZ J.; GUZMAN ViCtor Manuel; CEGLIA Gerardo; DEDE Enrique; GIMENEZ MariA; ESTEVE Vicente; MILLAN Antonio	[View] [Download]
Abstract: This work presents the design and tests of a low power (10 kW), medium frequency (100 kHz), inductive heating system, to provide energy to a shrinking unit dedicated to replace the mechanical tool-holders used at present in different machine-tools. The tool holder is a solid ring, which is expanded by the inductive heater to change tools, and cooled to shrink it, holding the tool with a bigger force than the standard mechanical units.The power generator works in resonance, the power switches operate in zero current switching mode (ZCS), and the power control operates in a modified Delta mode also known as Pulse Density Control. The power output is continually controlled from 10\% to a 100\% of maximum, and is regulated against external factors such as variations in input voltage, temperature, and different tool holder sizes and shapes.

	Investigating stability of a single inductor current mode controlled dual switching DC-DC converter By BENADERO Luis; MORENO Vanessa	[View] [Download]
Abstract: Conditions for avoiding subharmonic oscillations and even a chaotic dynamics in a dual dc-dc converter are presented in this paper. The power stage operates with only an inductor, whose current determines the control operation. Under high frequency switching conditions, an approximated one-dimensional map for the current is obtained, taking into account the general occurrence of two asynchronous switching during each cycle.

	Using Integral Reconstructor for Nonlinear-Controlled Boost Converter By LEYVA Ramon; ARTEAGA Maria Isabel; MARTINE	[View] [Download]
Abstract: In this paper, a passivity- based control is applied to a boost converter using integral reconstructors to observe the inductor current. The resulting controller only uses the capacitor output voltage and an input signal representing the switch position. The regulator large-signal stability is also demonstrated.