Increase in Power of DC/DC Converters with Increased Number of Conversion Channels

摘要

This paper provides the results of the study devoted to power increase for DC/DC converters with a larger number of channels. Possible options were demonstrated for bidirectional converters. Recommendations were given concerning using these types of converters in high-power electrical equipment, including electrical drives with their own power source. Battery electric cars are one of the ways to apply DC/DC converters. Battery cars wise, the aim is to increase voltage of a DC circuit and to reduce steady-state and transient current of a converter circuit. In addition, increasing voltage by means of using a DC/DC converter makes reducing of equipment weight and size of possible, since a battery of lower voltage and with a lower number of series elements can be used. Also by doing so battery control system can be simplified. Increased voltage of electric car circuits is required due to high standards in traction and speed performance. Consequently, power and torque should be high as well. The necessity for electric drives with higher voltage arises to meet the mentioned requirements. Hence, research of multi-channel bidirectional DC converters is relevant and urgent task.