Double-pulse cross-cycle modulation method for switching power supply and device thereof

A technology of cross-cycle modulation and switching power supply, which is applied in the direction of output power conversion devices, electrical components, and adjustment of electrical variables, etc., which can solve problems such as inapplicability, achieve small system output voltage ripple, simplify control loop design, and enhance The effect of system stability

Inactive Publication Date: 2012-09-05
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some applications of electronic equipment with high steady-state accuracy of the system, PSM technology will not be applicable

Method used

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  • Double-pulse cross-cycle modulation method for switching power supply and device thereof
  • Double-pulse cross-cycle modulation method for switching power supply and device thereof
  • Double-pulse cross-cycle modulation method for switching power supply and device thereof

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Experimental program
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Effect test

Embodiment Construction

[0020] figure 1 It is shown that the implementation device of the double-pulse inter-cycle modulation of the switching power supply consists of two parts: the main circuit (outside the dotted line box) and the controller (inside the dotted line box). The controller collects the output signal of the main circuit to generate a control signal, and feeds back to control the output of the main circuit. The main circuit is sequentially connected by a switching device 1 and a filtering device 2 . The controller is composed of a voltage detection device 3 , a comparator 4 , a pulse generator 5 , a pulse selector 6 and a drive circuit 7 . The output signal of the main circuit is input to the voltage detection device 3, the voltage detection device 3, the comparator 4, the pulse selector 6 and the drive circuit 7 are sequentially connected, and the drive circuit 7 is connected to the switching device 1; two kinds of pulses with different duty ratios can be generated The generator 5 is...

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PUM

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Abstract

The invention discloses a double-pulse cross-cycle modulation method for a switching power supply and a device thereof. After an output voltage vo of a main circuit is detected by a voltage detection device, and then the value of the output voltage vo is compared with the value of a reference voltage Vref and a value obtained by subtracting an error value (Vr-eref) from the reference voltage; if the vo is more than the Vref, a comparator outputs a low-level signal; if the vo is more than the Vr-eref and is less than the Vref, the comparator outputs a corresponding low duty cycle pulse signal; if the vo is less than the Vr-eref, the comparator outputs a corresponding high duty cycle pulse signal; within a clock cycle, a pulse selector selects a high duty cycle pulse signal and a low duty cycle pulse signal from a pulse generator according to the output of the comparator, or the pulse signal is not output; two pulse signals with different duty cycles are adopted to serve as the driving of a switch device; the voltage ripple output by a system is relatively small, the dynamic range of the input voltage of a load is widened, the system stability is enhanced, and the transient response speed is increased.

Description

technical field [0001] The invention relates to a switching power supply, in particular to a double-pulse inter-period modulation method and device thereof. Background technique [0002] With the rapid development of power electronics technology, the relationship between power electronic equipment and people's work and life is becoming increasingly close, and electronic equipment is inseparable from a reliable power supply. Compared with the traditional linear regulated power supply, the switching power supply has the advantages of high efficiency and small size, which makes the switching power supply technology gradually become a hot spot in people's application and research. The switching power supply is mainly composed of two parts: a power converter and a controller. The power converter, also known as the power circuit, mainly includes a switching device, a transformer device and a rectification and filtering circuit. Common power converter topologies include Buck con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156
Inventor 包伯成许建平潘赛虎马正华王金平
Owner CHANGZHOU UNIV
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