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One of the important role for dc-dc converters is to regulate output voltage against the transient variation of input voltage. Recently, renewable energy becomes popular and renewable power generators are connected to the dc power grid directly, dc bus voltage is affected from them. Therefore, the improvement of the transient response against the variation of the dc bus voltage is required to control...
The digital control has the attractive capability, for instance, the high-performance function and the energy management capability. On the other hand, there are issues which must be solved for the actual implementation. The proposed method can solve some of them, namely the transient response, the dynamic characteristics and the precision of the controller, with the simple method.
The purpose of this paper is to discuss performance characteristic of digital peak current mode control switching power supply. The proposed method can capture the peak current value in real time by using the voltage controlled oscillator (VCO), the programmable delay circuit and the signal frequency detector. Its transfer function is derived analytically. Also, the frequency characteristics are revealed...
This paper presents a new digital control method for dc-dc converter which consists of two A-D converters with different sampling frequencies. In the presented method, the calculation process of P and ID controls are parallel. The sampling frequency for the P control is higher than the switching frequency and one for ID control is lower than the switching frequency. Therefore, the P control and ID...
Generally, the training based control method for dc-dc converters has a problem due to the fact that there is a difference of behavior between a controlled system before the training and one after the training. Therefore, when it is adopted to improve the transient response of dc-dc converter, it is needed to consider the bad effect of the training since the training term does not take its own effect...
The purpose of this paper is to present a new peak-current injected digital control circuit for dc-dc converter and its dynamic characteristics. The proposed circuit is able to detect the peak point of the switch current in real time only by comparing two pulse trains. At the moment when the peak switch current is detected, the proposed circuit generates the turn off signal of the main switch. The...
The purpose of this paper is to present a new digital model control which detects multiple output values of multiple-output dc-dc converter. In this method, the P-I-D control and the static equation model are performed. The dynamic characteristics of digital control converter are improved as compared with the conventional one.
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