 Traditional high-frequency pulse width modulation (PWM) inverters for motor drives have several problems associated with their high frequency switching which produces high voltage change (dV/dt) rates. Multilevel inverters solve these problems because their devices switch at the fundamental frequency. Two different multilevel topologies are identified for use as a converter for electric drive...

This paper presents the control approach for single inverter dual coupled brushless DC motors (DCBLDC) drive system. One of the basic requirements of such systems, is the power balance between two motors and on the other hand, minimizing mechanical fluctuations in order to avoid mechanical equipment damage especially in the state of mechanical resonance. This paper also presents an improved for...

This paper presents a novel scalar based pulse width modulation (PWM) algorithm for four-level asymmetrical dual inverter fed induction motor drive. In the conventional carrier based PWM algorithms for dual inverter fed induction motor drive, both inverters will be operated at all modulation indices. But, the proposed PWM algorithm operates only one inverter at lower modulation indices and othe...

In all multilevel topology with several DC link, the voltage balancing problem of DC capacitors is a key problem. This paper proposes a new topology of chopper circuit for dc capacitor voltage balancing in diode clamped multilevel inverters (DCMLI). In the presented topology the number of switches is reduced respect to other proposed topology in literatures. Suggested topology is modular and ha...

This paper proposes two methods to improve the performance in real-time simulation. The increased inverter-based generations are gradually shifting operation of power grid. Consequently, investigation for safe and further application is essential inverter-dominated As simulated number non-linear switch elements like inverter increases, numerical complexity simulation model rises exponentially. ...

This paper proposes fluorescent electronic ballast with high power factor and low line input current harmonics. The system performance can be improved by a charged pump circuit. Details of design and circuit operation are described. The proposed electronic ballast is modified from single stage half bridge class D electronic ballast by adding capacitor parallel with each power switch and setting...