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Brad Bryant - IEEE Xplore Author Profile
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Brad Bryant

Also published under: B. Bryant

Publications
10
Citations
496
Publications by Year
20012007
Co-Authors:
Image of author Brad Bryant

Brad Bryant

Also published under: B. Bryant

Affiliation

Department of Electrical Engineering
Wright State University
Dayton, OH, USA

Publication Topics

Biography

Brad Bryant (M'98) received the M.S. and Ph.D. degrees in electrical engineering from Wright State University, Dayton, OH, in 2000 and 2004, respectively.,He was a Lab Teaching Assistant from 1998 to 1999, and a Graduate Teaching Assistant from 1999 to 2004, with the Department of Electrical Engineering, Wright State University. His research interests are in high-frequency resonant and PWM dc/dc power converters, dc/ac inverters, high-frequency rectifiers, modeling and control of converters, hi-fidelity vacuum tube audio equipment, and power semiconductor devices.,Dr. Bryant was named IEEE Wright State Student of the Year 1999, WSU Electrical Engineering Student of the Year 1999, and WSU Electrical Engineering Graduate Student of the Year 2...
Publications
10
Citations
496
Publications by Year
20012007
Co-Authors:
Author's Published Works

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Voltage-Loop Power-Stage Transfer Functions With MOSFET Delay for Boost PWM Converter Operating in CCM

Brad Bryant;Marian K. Kazimierczuk

IEEE Transactions on Industrial Electronics
Year: 2007 | Volume: 54, Issue: 1 | Journal Article |
Cited by: Papers (100)
Open-loop transfer functions can be used to create closed-loop models of pulsewidth-modulated (PWM) converters. The closed-loop small-signal model can be used to design a controller for the switching converter with well-known linear control theory. The dynamics of the power stage for boost PWM dc-dc converter operating in continuous-conduction mode (CCM) are studied. The transfer functions from ou...Show More

Voltage-Loop Power-Stage Transfer Functions With MOSFET Delay for Boost PWM Converter Operating in CCM

Brad Bryant;Marian K. Kazimierczuk

Year: 2007 | Volume: 54, Issue: 1 | Journal Article |

Voltage loop of boost PWM DC-DC converters with peak current-mode control

B. Bryant;M.K. Kazimierczuk

IEEE Transactions on Circuits and Systems I: Regular Papers
Year: 2006 | Volume: 53, Issue: 1 | Journal Article |
A new transfer function from control voltage to duty cycle, the closed-current loop, which captures the natural sampling effect is used to design a controller for the voltage-loop of a pulsewidth modulated (PWM) dc-dc converter operating in continuous-conduction mode (CCM) with peak current-mode control (PCM). This paper derives the voltage loop gain and the closed-loop transfer function from refe...Show More

Voltage loop of boost PWM DC-DC converters with peak current-mode control

B. Bryant;M.K. Kazimierczuk

Year: 2006 | Volume: 53, Issue: 1 | Journal Article |

Modeling the closed-current loop of PWM boost DC-DC converters operating in CCM with peak current-mode control

B. Bryant;M.K. Kazimierczuk

IEEE Transactions on Circuits and Systems I: Regular Papers
Year: 2005 | Volume: 52, Issue: 11 | Journal Article |
This paper derives the transfer function from error voltage to duty cycle, which captures the quasi-digital behavior of the closed-current loop for pulsewidth modulated (PWM) dc-dc converters operating in continuous-conduction mode (CCM) using peak current-mode (PCM) control, the current-loop gain, the transfer function from control voltage to duty cycle (closed-current loop transfer function), an...Show More

Modeling the closed-current loop of PWM boost DC-DC converters operating in CCM with peak current-mode control

B. Bryant;M.K. Kazimierczuk

Year: 2005 | Volume: 52, Issue: 11 | Journal Article |

Open-loop power-stage transfer functions relevant to current-mode control of boost PWM converter operating in CCM

B. Bryant;M.K. Kazimierczuk

IEEE Transactions on Circuits and Systems I: Regular Papers
Year: 2005 | Volume: 52, Issue: 10 | Journal Article |
Cited by: Papers (89)
This paper presents the analysis of open-loop power-stage dynamics relevant to current-mode control for a boost pulsewidth-modulated (PWM) dc-dc converter operating in continuous-conduction mode (CCM). The transfer functions from input voltage to inductor current, from duty cycle to inductor current, and from output current to inductor current are derived. The delay from the MOSFET gate drive to t...Show More

Open-loop power-stage transfer functions relevant to current-mode control of boost PWM converter operating in CCM

B. Bryant;M.K. Kazimierczuk

Year: 2005 | Volume: 52, Issue: 10 | Journal Article |

Small-signal duty cycle to inductor current transfer function for boost PWM DC-DC converter in continuous conduction mode

B. Bryant;M.K. Kazimierczuk

2004 IEEE International Symposium on Circuits and Systems (ISCAS)
Year: 2004 | Conference Paper |
Cited by: Papers (32)
The small-signal transfer function from duty cycle to inductor current is derived for the boost DC-DC converter operating in continuous conduction mode (CCM). The transfer function is found for two cases, the converter with a resistive load, and with a current sink load. The derivations are performed using an averaged circuit small-signal model of the boost converter for CCM. The transfer function...Show More

Small-signal duty cycle to inductor current transfer function for boost PWM DC-DC converter in continuous conduction mode

B. Bryant;M.K. Kazimierczuk

Year: 2004 | Volume: 5 | Conference Paper |

Sample and hold effect in PWM DC-DC converters with peak current-mode control

B. Bryant;M.K. Kazimierczuk

2004 IEEE International Symposium on Circuits and Systems (IEEE Cat. No.04CH37512)
Year: 2004 | Conference Paper |
Cited by: Papers (6)
The sample and hold effect, or quasi-digital (discrete) behaviour, of constant-frequency peak current-mode control (PCM) is pulse-width modulated DC-DC converters is presented in a manner consistent with the physical behaviour of the circuit. This approach develops a transfer function using control theory that captures the quasi-digital behaviour encountered when the current control loop is closed...Show More

Sample and hold effect in PWM DC-DC converters with peak current-mode control

B. Bryant;M.K. Kazimierczuk

Year: 2004 | Volume: 5 | Conference Paper |

Derivation of the Cuk PWM DC-DC converter circuit topology

B. Bryant;M.K. Kazimierczuk

Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03.
Year: 2003 | Conference Paper |
Cited by: Papers (7)
The derivation of the transformerless Cuk PWM DC-DC converter circuit is presented. Boost and buck PWM DC-DC converter circuits are cascaded through a unity-gain inverting stage. Circuit theory and manipulations I are used to simplify the cascaded circuit into the Cuk PWM DC-DC converter topology.Show More

Derivation of the Cuk PWM DC-DC converter circuit topology

B. Bryant;M.K. Kazimierczuk

Year: 2003 | Volume: 3 | Conference Paper |

Effect of a current-sensing resistor on required MOSFET size

B. Bryant;M.K. Kazimierczuk

IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications
Year: 2003 | Volume: 50, Issue: 5 | Journal Article |
Cited by: Papers (13)
The effect of a current-sensing resistor used in current-mode control of pulsewidth modulator (PWM) converters on required MOSFET aspect ratio, the ratio of channel width to channel length generally known as W/L, is studied. The results can also be applied to the effect of source parasitic resistance in a power MOSFET. These resistances require a significant increase in aspect ratio to achieve a d...Show More

Effect of a current-sensing resistor on required MOSFET size

B. Bryant;M.K. Kazimierczuk

Year: 2003 | Volume: 50, Issue: 5 | Journal Article |

Derivation of the buck-boost PWM DC-DC converter circuit topology

B. Bryant;M.K. Kazimierezuk

2002 IEEE International Symposium on Circuits and Systems (ISCAS)
Year: 2002 | Conference Paper |
The derivation of the buck-boost PWM DC-DC converter circuit is presented. The buck and boost converter circuits are cascaded through an inverting stage. Circuit theory and manipulation will be used to simplify the cascaded circuit into the familiar inverting buck-boost PWM DC-DC converter topology.Show More

Derivation of the buck-boost PWM DC-DC converter circuit topology

B. Bryant;M.K. Kazimierezuk

Year: 2002 | Volume: 5 | Conference Paper |

Impact of current sensing resistor on required MOSFET aspect ratio in PWM converters

B. Bryant;M.K. Kazimierczuk

Proceedings of the 44th IEEE 2001 Midwest Symposium on Circuits and Systems. MWSCAS 2001 (Cat. No.01CH37257)
Year: 2001 | Conference Paper |
This paper examines the impact of a current sensing resistor used in current-mode control of PWM converters on MOSFET aspect ratio. The results can also be applied to the impact of source parasitic resistance in a power MOSFET. These resistances introduce significant error in the required aspect ratio to achieve a desired maximum current capability. Experimental results are presented showing the v...Show More

Impact of current sensing resistor on required MOSFET aspect ratio in PWM converters

B. Bryant;M.K. Kazimierczuk

Year: 2001 | Volume: 2 | Conference Paper |

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