Medium-voltage pulse width modulated current source rectifiers using different semiconductors: loss and size comparison

Abstract

In this study, a comparison of losses and physical size is presented for three semiconductor devices suitable for medium-voltage high-power applications. The comparison is made for medium-voltage pulse width modulated (PWM) current source rectifiers (CSRs) using a selective harmonic elimination technique. The devices are high-voltage insulated gate bipolar transistors and two types of hard-driven thyristors, namely the symmetrical gate commutated thyristor and the asymmetrical gate commutated thyristor. The study is based on practical devices using data sheets from semiconductor device vendors, taking into account accurate discrimination between turn-off and recovery states. The constant-voltage switching energy data sheet curves for voltage source converters are adapted to suit varying voltage applications like the PWM-CSR, with emphasis on how voltage is shared between series devices during each commutation instant

Fully controlled 5-phase, 10-pulse, line commutated rectifier

“…(29) and (30) show that, non-sinusoidal current affects the power factor of the rectifier specially when firing angle is increased.…”

“…Firstly, power factor control rectifiers operate at high switching frequency [22][23][24]. Many papers deal with three-phase PWM rectifiers' performance, simulation, modeling, and control [22,[25][26][27][28][29]. Secondly, line commutated rectifiers, uncontrolled using diodes or controlled using thyristors, operate at power frequency or generated frequency.…”

Vector controlled five-phase PWM-CSI induction motor drive

“…The disadvantage of the CSI drive is that it has higher losses than the VSI due to snubber circuits and the dc-link inductor [27]. PWM-CSI(s) originally uses GTO's and now use GCTs and IGBTs [15], [25], [28]. An idealized n-phase PWM current source inverter with IGBT switches is shown in fig.…”

Performance evaluation of eleven-phase induction machine using selective harmonic elimination

“…The 15 th harmonic is also eliminated to obtain an odd number of switching angles. Since the selected number of switching angles will be seven to fulfill the above requirements, the switching frequency will be 15 times the operating frequency, which is suitable for medium voltage inverters [14]. The relation between the switching angles, and the modulation index, M, is shown in Fig.…”