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A pulse modulation method and system

A pulse modulation and pulse technology, applied in the field of pulse modulation methods and systems, can solve problems such as intelligent adjustment of the frequency of the power supply that cannot be switched, and achieve the effects of reducing noise and electromagnetic interference, satisfying high frequency, and reducing switching loss.

Active Publication Date: 2019-06-25
上海儒竞电控技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a pulse modulation method and system for solving the problem in the prior art that the frequency of the switching power supply cannot be intelligently adjusted according to the actual input voltage

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  • A pulse modulation method and system
  • A pulse modulation method and system
  • A pulse modulation method and system

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Embodiment Construction

[0027] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0028] It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and number of componen...

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Abstract

The present invention provides a pulse modulation method and system. The method includes: receiving an input of a voltage signal; calculating the input angular frequency of the voltage signal; calculating the start time of the next switching cycle according to the input angular frequency; Based on the given basic switching frequency, the switching frequency in the next switching cycle is calculated; when the next switching cycle is judged according to the start time, the switching frequency in the next switching cycle is calculated according to the given duty cycle and , to generate a PWM wave with a corresponding pulse width. The present invention can intelligently adjust the switching frequency in the next switching cycle according to the current actual input voltage signal, and the higher the voltage, the smaller the switching frequency, reducing the switching loss; the switching frequency takes the basic switching frequency as a reference value, which can meet High frequency requirements; the switching frequency changes within a certain range, which can make the power spectrum broadband distribution, thereby reducing noise and electromagnetic interference.

Description

technical field [0001] The invention relates to the field of switching power supplies, in particular to a pulse modulation method and system applied to switching power supplies. Background technique [0002] Due to the many advantages of switching power supply in terms of quality, volume, energy density and efficiency, it has been widely used in many fields such as industrial production and household appliances. [0003] The most important feature of switching power supply is high frequency. By changing the circuit structure through high-frequency switching of switching elements (such as IGBT and MOSFET), it can effectively reduce the volume of inductance and capacitance, thereby achieving miniaturization. At present, the most widely used pulse width modulation technology (PWM) has a fixed switching frequency. The electromagnetic interference in the switching power supply will pollute the power grid and affect the normal operation of nearby electronic equipment, and the freq...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/08
CPCH02M1/08H02M1/0054Y02B70/10
Inventor 杨喜军廖原刘伟光熊德华邓伟湧邓贺
Owner 上海儒竞电控技术有限公司
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