Asymmetric slope compensation for digital hybrid current mode control of a three-level flying capacitor buck converter

2020 ◽  
Vol 28 (4) ◽  
pp. 2345-2359
Author(s):  
Abdulkerim UĞUR ◽  
Murat YILMAZ
Keyword(s):  
Current Mode ◽  
Buck Converter ◽  
Current Mode Control ◽  
Mode Control ◽  
Slope Compensation

scholarly journals Hybrid Current-Mode Control of PSFB Converter to Compensate Slew Interval and Prevent Magnetic Saturation of Transformers

Electronics ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1395 ◽  
Author(s):  
Jae-Hak Ko ◽  
Seung-Woo Baek ◽  
Kang-Mun Lee ◽  
Hag-Wone Kim ◽  
Kwan-Yul Cho ◽  
...  
Keyword(s):  
Current Mode ◽  
Current Mode Control ◽  
Mode Control ◽  
Switching Losses ◽  
Dc Power ◽  
Compensation Methods ◽  
Slope Compensation ◽  
Power Stage ◽  
Control Response ◽  
In Series

This paper proposes a newly developed hybrid current-mode control (HCMC) method for phase-shifted full-bridge (PSFB) converters. Generally, PSFB converters have been widely used in various DC-DC power applications owing to their ease of control and low switching losses. However, the transformer can be saturated by volt-second imbalance of the magnetizing inductance. Therefore, a blocking capacitor can be used in series with the transformer, or peak current-mode control methods with slope compensation can be applied, to prevent transformer saturation. However, blocking capacitors increase the material cost and make the power stage bulky. Moreover, the overcompensation by slope compensation methods delays the control response. This paper proposes a hybrid current-mode control (HCMC) for PSFB converters to solve these problems. A blocking capacitor and slope compensation are not required in the proposed HCMC method for PSFB converters. The proposed HCMC method has no transformer saturation and output response delay, and the efficacy of this method has been verified through simulations and experiments.

Sign in / Sign up

Export Citation Format

Share Document