The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The purpose of this paper is to present a digital control method which suppresses the delay-time for the switching power supplies. The operation part of power supply has two controllers as the fast PD and the conventional PID, which are processed in parallel. Therefore, the fast PD control can improve the transient response of switching pulses. Obtained simulation results show that the proposed method...
This paper presents a novel sensorless model control dc-dc converter. In the proposed method, the output current is predicted from the duty ratio and the output voltage in order to exclude the sensing resistor. Only the output voltage and the input voltage are detected. The transient characteristics in the proposed method without the current detection are compared to the existing proposed method and...
The purpose of this paper is to presents a new integral gain switchover method that has the unique hysteresis function in which the current sensor circuit is not required. In this paper, two kind of integral gain switchover method is indicated. One is te two-step switchover method having the rectangle hysteresis function. The other is slope switchover method having rectangular triangle hysteresis...
The purpose of this paper is to present a digital control method which suppresses the delay-time for the switching power supply. Generally, there is the delay-time caused by the A/D conversion time and the calculation time in the digital control. It causes the worsening of the transient response and brings the instability of the system. The proposed method can suppress the delay-time and improve the...
The aim of this paper is to present static and dynamic analyses of digital peak current mode dc-dc converter. The current detection circuit of the proposed method consists of RC integrator and comparator as the AD converter. The proposed method can detect the peak current in real time. Analyses and the transient response of proposed method are discussed in this paper. As a result, the convergence...
This paper studies the digital controlled dc-dc converter which employs the neural network in coordination with PID control. Especially, we focus on the problem of overcompensation to the transient response of the output voltage in the dc-dc converter by the neural network control. Our previous studies suggested that the neural network control is effective to improve the transient response of the...
The purpose of this paper is to present a model control method without a current detection. In the proposed method, output current is predicted from the duty ratio and the output voltage in order to exclude the sensing resistor. Only the output voltage and input voltage are detected. The bias value of the P-I-D control is changed using the predicted output current. This value is controlled based on...
The purpose of this paper is to present the 1MHz sampled quick response digital control dc-dc converter. The proposed method is the digital control method with the FIR filter and the P control. In the proposed method, the coefficient of the FIR filter is approximated by being rounded to three decimal place for reducing the cost of the calculation. The approximated FIR filter has also same characteristics...
The purpose of this paper is to present an integral gain changeable digital control dc-dc converter for the wide input and load regulation. The integral gain is switched by an average reactor current value, and its value is determined using the stabilization range of output voltage based on the integral control. Therefore, the proposed method can obtain good regulation characteristics in any input...
This paper presents a new digital load-dependent soft-start method of dc-dc converter for energy management system. The soft-start operation is used to prevent negative effects for a power supply. In the conventional soft-start operation, the dc-dc converter must start up very slowly to deal with the worst load condition. It takes long time to start up a power supply. The proposed digital control...
This paper presents the digital control method for the wide transient range dc-dc converter. We have already reported that an exponential function model is effective in improvement of transient characteristic. There is a problem that calculation time is long by using the exponential function and the square root. In this paper, those functions are approximated in order to achieve the calculation time...
The purpose of this paper is a new digital peak current control for the dc-dc converter with a fast proportional (P) control and IIR filter. The proposed control circuit has two features. First, a simple A-D converter for the peak current detection is used. It is consist of an RC integrator and delay circuit. The sampling point of detected current is changed by the feedback value of output voltage...
This study presents a novel adaptive control based on a neural network for dc -- dc converters. The control method is required to adapt to changes of conditions to obtain high performance dc -- dc converters. In this study, the neural network control is adopted to improve the transient response of dc -- dc converters. It woks in coordination with a conventional PID control to realize a high adaptive...
The purpose of this paper is to present a transient response of proposed quick response peak current control dc-dc converter. In the proposed method, the peak current is able to be detected in real time by using voltage controlled oscillator (VCO) which is very low cost and a high speed A-D converter. The proposed circuit generates the turn off signal of the main switch. In simulated results, the...
In the previous research, the fast P control method is proposed. In this method, the PID control part is divided into the P control and I-D control parts. The high speed-low resolution A-D converter and low speed-high resolution A-D converter are required for the P control and I-D control, respectively. These two A-D converters are lower cost than the high-speed and high-resolution A-D converter....
This paper presents a new soft-start method for the current mode digital control dc-dc converter. For the soft-start operation, it is important to detect the load current. In the analog control method, the fixed parameter of the soft-start circuit must be set. In the proposed digital control in the current mode control, the load resistor can be calculated with the output voltage and output current...
The purpose of this paper is to present a novel reference modification dc-dc converter using the reactor current sensing method and to compared its transient characteristics with the conventional output current sensing method. The proposed method uses the reactor current sensing method with the R-C filter in order to exclude the sensing resistor for the output current sensing method. Moreover, transient...
This paper presents a new STS (Steady-state-error and Transient Suppressions) model dc-dc converter using the reactor current and its transient characteristics. The controlled object is the reference bias in the P-I-D control and the reference value in the P control. The reference bias is controlled in both steady and transient states. The reference value is modified to suppress transient characteristics...
This paper presents a new quick response digital control dc-dc converter with the bias modification and its transient characteristics. In this new research, the reference bias in the P-I-D control is controlled by the reactor current sensing method with the R-C filter. In this case, the averaged reactor current is used in the model control by the low-pass filter with op-amp. In this paper, the proposed...
In this paper, a novel digital fast response current-mode dc-dc converter using the current controlled oscillator (ICO) and the digital fast PID control is proposed. The ICO is a low price and can be transformed to digital value quickly when the reactor current is detected. The digital fast PID control means the P and ID control are processed parallel. The sampling period of P control is shorter than...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.