Design Optimization of Hybrid-Switch Soft-Switching Inverters Using Multiscale Electrothermal Simulation

Abstract

The development of a fully automated tool that is used to optimize the design of a hybrid switch soft-switching inverter using a library of dynamic electro-thermal component models parameterized in terms of electrical, structural and material properties is presented. A multi-scale electro-thermal simulation approach is developed allowing for a large number of parametric studies involving multiple design variables to be considered, drastically reducing simulation time.Traditionally, electro-thermal simulation and analysis has been used to predict the behavior of pre-existing designs. While the traditional approach to electro-thermal analysis can help shape cooling requirements and heat sink designs to maintain certain junction temperatures, there is no guarantee that the design under study is the most optimal. This dissertation uses electro-thermal simulation to guarantee an optimal design and thus truly minimizing cooling requirements and improving device reliability.The proposed optimization tool is used to provide a step-by-step design optimization of a twocoupled magnetic hybrid soft-switching inverter. The soft-switching inverter uses a two-coupled magnetic approach for transformer reset condition [1], a variable timing control for achieving ZVS over the entire load range [2], and utilizes a hybrid switch approach for the main device [3].

Online Optimal Switching Frequency Selection for Grid-Connected Voltage Source Inverters

“…The behavioral model alongside loss parameters taken from the device datasheet has been adopted in this paper due to its simplicity as in [24]. Moreover, in [25,26], the adopted behavioral model provides a good estimate of the actual losses as can be deduced from their comparative analysis.…”

Investigated Analysis and New Zero-Sequence Harmonic Injection Pulsewidth Scheme for Overmodulation Region

“…Additionally, some schemes suffer from unequal thermal stress between semiconductor switches [17]- [19] and others from considerable low-order harmonics resulting in pulsating torque phenomenon. Ultimately, continuous PWM schemes' modulators are employed in overmodulation region.…”

Comparative analysis of Voltage Source Inverter with clamper circuit at various modulation indexes

“…As described above, the switching losses in the inverter with SPWM are more, which further leads to a fall in the efficiency of electrical energy output. It also puts too much pressure on the thermal control of the switch [3]. At very high values of m, the smoothness of output waveform becomes very good.…”