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.
Mechanism of current ripple propagation in a digital controlled LLC converter is investigated from three aspects: battery load, quantization error and double line frequency perturbation at input. With conventional Frequency Modulation (FM), every modulation step is accompanied by quantization error due to limited resolution of digital controllers. Large current ripple is propagated to output due to...
This paper introduces a practical auto-tuned controller achieving near minimum deviation of the output voltage while using mixed-signal current programmed mode (CpM) implemented with very simple digital hardware. Compared to most time optimal and minimum deviation control methods, this method does not rely on fast current sensing and/or valley point detection, is unaffected by components variations,...
The control system described in this work tunes a digital controller to achieve the specified phase margin and crossover frequency by applying a design method based on the measured frequency response of the DC/DC converter, identified by the system itself. The converter is working closed-loop from the start but with a simple controller, so the output voltage remains regulated though does not meet...
In this paper a digital control technique for light load efficiency and THD improvement for a PFC converter is presented. This technique does not require any complex external logic or cycle intensive software algorithms. When a PFC converter runs in discontinuous conduction mode (DCM) and the PFC MOSFET is in off state, the energy in the MOSFET parasitic capacitance resonates between the PFC inductor...
This paper introduces a robust, hardware-efficient auto-tuned digital controller applicable to various hard switching dc-dc converters, including indirect energy transfesr topologies. Unlike existing fast transient controllers for indirect energy transfer converters, the controller achieves fast transient response and practically minimum deviation of the output voltage without depending on information...
This paper introduces a fully-integrated 12-to-1.xV voltage regulator module IC. A fully synthesizable digital two-loop controller has been realized through HDL tools. Several new IP blocks have been developed: a window delay-line based ADC, two independent PI compensators with shared hardware for calculations, high-resolution digital PWM (HR-DPWM), and a programmable dead-time module. The mixed-signal...
Current regulation is a critical issue for the stable operation of three-phase active power filters (APF). The challenge of the current controller lies in how to track the high slew rate reference with zero steady-state error in a fast and accurate way. Conventionally, multiple paralleled second-order generalized integrators (SOGIs) are utilized to achieve those objectives. However, it will increase...
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.