A novel soft switching two-stage heating power supply topology for silicon growth furnace

Robust control strategies for a two‐stage soft‐switching heating power supply of silicon growth furnace

“…The simulation results in Figures 7 and 8 are consistent with the results in references [10, 21, 22], which shows that the two‐stage soft‐switching heating power supply using the proposed robust control methods work properly.…”

“…The auxiliary switch S 7 , using sector 1 for example, switches off before the voltage vector U 0 was activated and remain turn-off at a specified short interval within each switching period to create the zero voltage soft-switching conditions for the main circuit switches S 1 to S 6 , as shown in Figure 3. The more detailed working principle of the CACZVS three-phase PFC converter can be found in references [10,21].…”

“…In this paper, a two‐stage soft‐switching topology reviewed in [21] is used and the robust control methods are proposed for two‐stage converter separately to improve the performance of the heating power supply. The robust power model predictive control (RP‐MPC) in current loop combined with the sliding‐mode observer based control in voltage loop is proposed for the first‐stage AC/DC converter of the power supply, which achieves the unity PF control and robust to the circuit parameters uncertainty in the first‐stage converter and the load variation.…”