Analysis of a multilevel multicell switch-mode power amplifier employing the "flying-battery" concept
Tóm tắt
This paper presents a novel switch-mode power amplifier based on a multicell multilevel circuit topology. The total output voltage of the system is formed by series connection of several switching cells having a low DC-link voltage. Therefore, the cells can be realized using modern low-voltage high-current power MOSFET devices and the DC link can easily be buffered by rechargeable batteries or "super" capacitors to achieve very high amplifier peak output power levels ("flying-battery" concept). The cells are operated in a phase-shifted interleaved pulsewidth-modulation mode, which, in connection with the low partial voltage of each cell, reduces the filtering effort at the output of the total amplifier to a large extent and, consequently, improves the dynamic system behavior. The paper describes the operating principle of the system, analyzes the fundamental relationships being relevant for the circuit design, and gives guidelines for the dimensioning of the control circuit. Furthermore, simulation results as well as results of measurements taken from a laboratory setup are presented.
Từ khóa
#Power amplifiers #Pulse amplifiers #Low voltage #Switching circuits #Circuit topology #MOSFET circuits #Power MOSFET #Batteries #Capacitors #High power amplifiersTài liệu tham khảo
10.1109/28.536875
rufer, 1999, asymmetric multilevel converter for high resolution voltage phasor generation, Proc 8th European Conf on Power Elctronics and Applications (EPE)
10.1109/TIE.2002.803212
jana, 1999, Charging pure lead-tin batteries
10.1109/APEC.2000.822824
10.1109/PESC.1998.701902
ertl, 1997, a novel switch-mode power amplifier with high output voltage quality employing a hybrid output voltage filter, Proc Power Electronics and Intelligent Motion Conf (PCIM 97), 419
ertl, 1996, a new 1 kw class-d supported linear power amplifier employing a self-adjusting ripple cancellation scheme, Proc Power Electronics and Intelligent Motion Conf (PCIM 96), 265
10.1109/PESC.1997.616848
pforr, 1999, switch-mode current amplifier with high output current quality employing an active output filter, Proc Power Electronics and Intelligent Motion Conf (PCIM 99), 279
10.1109/41.557506
10.1109/TPEL.1986.4766276
10.1109/28.793373