TY  - CHAP
A1  - Pötter, Jan
A1  - Pfost, Martin
A1  - Schullerus, Gernot
T1  - A novel brushless excitation system for synchronous machines with a rotating power converter
T2  - 2019 IEEE 13th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG)
N2  - A novel brushless excitation concept for synchronous machines with a rotating power converter is proposed in this paper. The concept does not need an auxiliary winding or any other modification to the machine structure apart from an inverter with a DC link capacitor and a controller on the rotor. The power required for the rotor excitation is provided by injecting harmonics into the stator winding. Thus, a voltage in the field coil is induced. The rotor inverter is controlled such that the alternating current charges the DC link capacitor. At the same time the inverter supplies the DC field current to the field coil. The excitation concept is first developed in theory, then presented using an analytical model and FEA, and lastly investigated with a prelimininary experimental setup.
KW  - brushless synchronous machine
KW  - brushless excitation
KW  - optimization
Y1  - 2019
U6  - http://dx.doi.org/10.1109/CPE.2019.8862391
PB  - IEEE
CY  - Piscataway, NJ
ER  - 
TY  - CHAP
A1  - Pötter, Jan
A1  - Pfost, Martin
A1  - Schullerus, Gernot
T1  - Design aspects of a novel brushless excitation system for synchronous machines
T2  - 2019 IEEE International Electric Machines & Drives Conference (IEMDC) : May 12-15, 2019, Westin San Diego, San Diego, CA
N2  - In this work design rules for a novel brushless excitation system for externally excited synchronous machines are discussed. The concept replaces slip rings with a fullbridge active rectifier and a controller mounted on the rotor. An AC signal induced from the stator is used to charge the rotor DC link. The DC current for the rotor excitation is provided from this DC link source. Finite element analysis of an existing machine is used to analyze the practicability of the excitation system.
KW  - brushless excitation
KW  - machine design
KW  - externally excited synchronous machine
Y1  - 2019
SN  - 978-1-5386-9350-6
U6  - http://dx.doi.org/10.1109/IEMDC.2019.8785200
SP  - 1228
EP  - 1233
PB  - IEEE
CY  - Piscataway, NJ
ER  - 
TY  - CHAP
A1  - Pötter, Jan
A1  - Pfost, Martin
A1  - Schullerus, Gernot
T1  - Harmonic excitation concepts for wound-rotor synchronous machines with power-electronics on the rotor
T2  - 2020 International Conference on Electrical Machines (ICEM), proceedings : August 23-26, 2020, Gothenburg, Sweden
N2  - In this work, a brushless, harmonic-excited wound-rotor synchronous machine is investigated which utilizes special stator and rotor windings. The windings magnetically decouple the fundamental torque-producing field from the harmonic field required for the inductive power transfer to the field coil. In contrast to conventional harmonic-excited synchronous machines, the whole winding is utilized for both torque production and harmonic excitation such that no additional copper for auxiliary windings is needed. Different rotor topologies using rotating power electronic components are investigated and their efficiencies have been compared based on Finite-Element calculation and circuit analysis.
KW  - AC motors
KW  - inductive power transmission
KW  - brushless machines
KW  - stators
KW  - rotors
KW  - AC-DC-converters
KW  - windings
KW  - harmonic analysis
KW  - stator windings
KW  - topology
KW  - torque
KW  - inverters
Y1  - 2020
SN  - 978-1-7281-9945-0
U6  - http://dx.doi.org/10.1109/ICEM49940.2020.9270724
SP  - 707
EP  - 713
PB  - IEEE
CY  - Piscataway, NJ
ER  -