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Circuit reducing electromagnetic interference and increasing peak power through adjusting pulse

A technology of electromagnetic interference and peak power, applied in the direction of output power conversion device, high-efficiency power electronic conversion, emergency protection circuit device, etc., can solve the problems of low overload capacity of power supply, reduced capacity, and inability to guarantee the normal operation of the circuit, etc., to improve The effect of power efficiency and reliability, improving efficiency and reliability, and maintaining system stability

Active Publication Date: 2016-09-14
企达智能科技(南京)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art: 1, traditional switching power supply utilizes the method of continuous pulse width modulation (PWM), can produce very strong electromagnetic interference (EMI) during power supply operation, and power overload capacity is low
2. Almost all switching power supplies use electrolytic capacitors, and the capacity will decrease at low temperatures
If the temperature drops below a certain value, the capacitors in this device may not be able to guarantee the proper operation of the circuit

Method used

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  • Circuit reducing electromagnetic interference and increasing peak power through adjusting pulse
  • Circuit reducing electromagnetic interference and increasing peak power through adjusting pulse
  • Circuit reducing electromagnetic interference and increasing peak power through adjusting pulse

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Embodiment Construction

[0027] All drawings are for describing the present invention more clearly, and are not intended to limit the scope of the present invention.

[0028] The invention introduces a circuit that reduces electromagnetic interference and increases peak power by adjusting pulses. Compared with other circuits for reducing electromagnetic interference, the focus of the invention is that the chip works in intermittent pulse groups, and the energy of each pulse group is uniformly distributed in the time domain to reduce electromagnetic interference. In the preferred embodiment of the invention, a small switching power supply with input alternating current (AC) from 90V to 475V is provided. In addition, the invention is small in size and can be widely used in large and small circuits where efficiency and reliability are critical.

[0029] Such as Figure 1A , Figure 1B and figure 2 As shown, the present invention includes a signal input terminal 1 , a signal output terminal 2 , a powe...

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Abstract

The invention provides a circuit reducing electromagnetic interference and increasing peak power through adjusting pulse. The circuit reducing ACDC power source electromagnetic interference and improving instantaneous power through adjusting PWM working pulses includes a signal input terminal, a signal output terminal, a power supply line, a pulse counting control unit, an auxiliary power source energy saving unit, a pulse group delay unit, a temperature protection unit and an oscillator. The pulse counting control unit and the pulse group delay unit is used for adjusting pulses in the pulse width modulation process and reduces electromagnetic interference of the circuit. The pulse number of one period of the pulse counting control unit is increased, the power output to the load is increased additionaly. On the other hand, the pulse group delay unit changes starting time of each group of pulses so as to reduce integral radiation. An auxiliary power energy saving unit can improve power reliability and reduce power consumption.

Description

technical field [0001] The present invention relates to an electronic circuit design that reduces electromagnetic interference (EMI). More specifically, the present invention reduces electromagnetic interference and increases the peak power capability of the switching power supply by adjusting the pulse generation rules and modifying the pulse width through electronic circuits. Background technique [0002] In the prior art: 1. The traditional switching power supply uses a continuous pulse width modulation (PWM) method, which will generate strong electromagnetic interference (EMI) during power supply operation, and the power supply has low overload capacity. 2. Almost all switching power supplies use electrolytic capacitors, and the capacity will decrease at low temperatures. If the temperature drops below a certain value, the capacitors in this device may not be able to guarantee the proper operation of the circuit. Therefore, there is a need for a method that can ensure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/44H02M1/08H02M1/32H02H7/12
CPCH02H7/1203H02M1/08H02M1/32H02M1/44H02M1/0003H02M1/327H02M1/14H02M3/33515H02M3/33523H02M1/0032Y02B70/10
Inventor 哈里森·袁汤海龙查尔斯·梁
Owner 企达智能科技(南京)有限公司
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