Dieter Polenov
BMW
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Dieter Polenov.
IEEE Transactions on Power Electronics | 2010
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
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
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
Dieter Polenov; Tomas Reiter; Roman Baburske; Hartmut Pröbstle; Josef Lutz
Archive | 2009
Dieter Polenov; Hartmut Pröbstle; Tomas Reiter
european conference on power electronics and applications | 2007
Dieter Polenov; Hartmut Pröbstle; Andreas Dr. Brösse; Gottfried Domorazek; Josef Lutz
Archive | 2007
Dieter Polenov; Hartmut Proebstle; Tomas Reiter
Archive | 2009
Andreas Broesse; Dieter Polenov; Hartmut Proebstle; Markus Fuchs; Michael Roesler; Maximilian Schmidl
european conference on power electronics and applications | 2009
Tomas Reiter; Dieter Polenov; Hartmut Pröbstle; Hans-Georg Herzog
Archive | 2009
Andreas Broesse; Dieter Polenov; Hartmut Proebstle; Marcus Hafkemeyer