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The PFC Boost converter controlled by the mode of CCM has strong non-linearity due to the use of non-linear elements such as power switch and multipliers. Here, a globally optimised control strategy of dynamic slope compensation is proposed to eliminate bifurcation, chaos behaviours. Time-varying adjustment of control efforts can achieve the optima...
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This paper proposes a simple and effective digital feedforward algorithm to improve the power quality of a boundary-conduction-mode (BCM) boost converter for power-factor-correction (PFC) applications. BCM boost converters suffer from a zero-crossing distortion of the line current caused by the valley switching of the converter. The feedforward alg...
Citations
... The FAULT terminal signal and the 3V reference voltage are input to a comparator [13] composed of and through an emitter follower respectively. When the input voltage at FAULT is higher than 3 V, and are turned on, and are turned off, and FDC_OUT outputs high; when the input voltage at FAULT is lower than 3 V, and are turned off, and are turned on, and FDC_OUT outputs low [14]. The ports are described as follows: 1) VIN_5 V: 5 V power supply terminal. ...
The basic idea of the circuit fault diagnosis method based on fault logic is to establish a computer expert database system first, connect the computer to the GPIB interface card, and then connect each intelligent instrument through the GPIB standard bus. Through the connection of the tested object adapter and the tested object, a circuit fault expert diagnosis and test platform are formed. Based on the traditional fault simulation model, this paper improves the fault logic circuit of switching power supply, designs the system model of fault simulation, deals with the logic structure and circuit hierarchy respectively, and produces the final output through the logic gate circuit by comparing the results of the fault logic circuit and the fault-free logic circuit. The designed switching power supply fault logic circuit works in the switching state, which has the characteristics of low loss and high energy conversion efficiency. Through the simulation analysis, the output is connected to the comparator, which plays the role of the whole wave. The simulation results are in line with the parameter indicators. The functional test results of the chip show that the function of the module is basically normal, which has practical application value and good portability and can be used as a reference for similar electrical designs.
