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Dive into the research topics where Dieter Polenov is active.

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Featured researches published by Dieter Polenov.


IEEE Transactions on Power Electronics | 2010

PWM Dead Time Optimization Method for Automotive Multiphase DC/DC-Converters

Tomas Reiter; Dieter Polenov; Hartmut Pröbstle; Hans-Georg Herzog

This paper introduces a PWM dead time optimization method for multiphase DC/DC-converters with synchronous rectifiers. The aim of the method is to reduce power losses. After a perturbation of the dead times in one converter phase, the phase-currents starts to deviate, whereby the most efficient phase has the higher current. A current balancing controller compensates for this deviation by adjusting duty cycles. Consequently, optimal dead times can be detected by duty cycle differences of the phases. The proposed optimization approach was implemented in a two-phase boost-/buck converter prototype for automotive dual-voltage power-nets. No additional components or circuit modifications were necessary. The detection of optimal dead times, increasing efficiency and reduction of voltage transients are discussed and investigated experimentally.


power electronics specialists conference | 2008

Observer based PWM dead time optimization in automotive DC/DC-converters with synchronous rectifiers

Tomas Reiter; Dieter Polenov; Hartmut Pröbstle; Hans-Georg Herzog

An observer based PWM dead time optimization approach for DC/DC-converters with synchronous rectifiers is introduced. The method is well suited, if optimization of PWM dead times at varying converter bus-voltages is required. In order to minimize effects of uncertainties, disturbances and noise on the estimated state variables, an intrinsic hardware implemented observer is proposed. A two-phase DC/DC-converter prototype for an automotive dual-voltage power-net was developed. The optimization concept was realized in the converter control structure without using additional components. The detection of optimal PWM dead times, increasing efficiency and reduction of voltage transients were shown experimentally.


energy conversion congress and exposition | 2009

Bus-voltage ripple optimization method for automotive multiphase DC/DC-converters

Tomas Reiter; Dieter Polenov; Hartmut Pröbstle; Hans-Georg Herzog

Phase interleaving is a well known technique to increase output power, power density, and efficiency of DC/DC-converters. If the n-phase converter is ideal (symmetrical), the first n-1 harmonics of the ripple are canceled in the bus-capacitors and the cut-off frequency of the EMI-filters can be increased. But tolerances of real components and control circuit can seriously limit this theoretical benefit. Tolerances of phase-shift, storage inductors and phase-current sensors are investigated to determine the causes of an unsymmetrical converter system. In order to ensure near ideal ripple cancellation despite high phase-current sensor tolerances, an approach using closed-loop control of the 1st harmonic is introduced and tested experimentally. This approach significantly improves the current balancing performance of an automotive two-phase converter.


european conference on power electronics and applications | 2009

The influence of turn-off dead time on the reverse-recovery behaviour of synchronous rectifiers in automotive DC/DC-converters

Dieter Polenov; Tomas Reiter; Roman Baburske; Hartmut Pröbstle; Josef Lutz


Archive | 2009

Method for controlling electrical energy storage in vehicle, involves determining time period energy surplus or shortage of energy, and accomplishing energy transfer into energy storage or from energy storage on basis of time period

Dieter Polenov; Hartmut Pröbstle; Tomas Reiter


european conference on power electronics and applications | 2007

Integration of supercapacitors as transient energy buffer in automotive power nets

Dieter Polenov; Hartmut Pröbstle; Andreas Dr. Brösse; Gottfried Domorazek; Josef Lutz


Archive | 2007

Motor vehicle power supply system has power supply system branch with load and voltage source connected in parallel, and power supply system branch is coupled by direct current converter with former power supply system branch

Dieter Polenov; Hartmut Proebstle; Tomas Reiter


Archive | 2009

System and Method for Supplying Voltage to Electrical Loads of a Motor Vehicle by Using a Supercap

Andreas Broesse; Dieter Polenov; Hartmut Proebstle; Markus Fuchs; Michael Roesler; Maximilian Schmidl


european conference on power electronics and applications | 2009

Optimization of PWM dead times in DC/DC-converters considering varying operating conditions and component dependencies

Tomas Reiter; Dieter Polenov; Hartmut Pröbstle; Hans-Georg Herzog


Archive | 2009

System for Supplying Voltage to Electrical Loads of a Motor Vehicle

Andreas Broesse; Dieter Polenov; Hartmut Proebstle; Marcus Hafkemeyer

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