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A frequency modulation topology no-load control circuit and its control method

A technology of control circuit and control method, applied in the direction of regulating electrical variables, control/regulating systems, electrical components, etc., can solve problems such as large output voltage ripple, and achieve the effect of solving the problem of voltage regulation

Active Publication Date: 2020-12-25
JINING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high frequency in the FM topology no-load control circuit in the prior art will bring additional electromagnetic compatibility problems, and the hiccup mode will bring the problem of large ripples in the output voltage

Method used

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  • A frequency modulation topology no-load control circuit and its control method
  • A frequency modulation topology no-load control circuit and its control method
  • A frequency modulation topology no-load control circuit and its control method

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Such as Figure 1-5As shown, a frequency modulation topology no-load control circuit according to the present invention includes a transformer T1, and the primary side winding side of the transformer T1 is connected with a primary side driving circuit, and the primary side driving circuit includes a first primary side insulated gate bipolar transistor Qp1, the second primary-side IGBT Qp2, the third primary-side IGBT Qp3, and the fourth primary-side IGBT Qp4, wherein the first primary-side IGBT Qp1 It is connected in series with the second primary-side IGBT Qp2, the third primary-side IGBT Qp3 is connected in series with the fourth primary IGBT Qp4, and the first primary-side IGBT The series circuit of the transistor Qp1 and the second primary insulated gate bipolar transistor Qp2 is connected in parallel with the series circuit of the third primary insulated gate bipolar transistor Qp3 and the fourth primary insulated gate bipolar transistor Qp4, and then connected wit...

Embodiment 2

[0046] In the control method of a frequency modulation topology no-load control circuit according to the present invention, an interrupt control program is provided in the controller, and the interrupt control program realizes the control of the CONTROL1 signal control terminal. The interrupt control program includes the following steps:

[0047] S1: When the level of the CONTROL1 signal control terminal is low level, when the driver pri signal port and the driversec signal port are turned on at the same time, the energy on the primary winding side of the transformer T1 is transferred to the secondary winding side during this period;

[0048] S2: When the load of the control circuit is small or the condition that the signal control terminal of the signal CONTROL1 is set to a high level is not met, the driver pri signal port is turned off after a certain time than the driver sec signal port, and the energy of the secondary winding side is in this The energy is transferred to the...

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PUM

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Abstract

The invention discloses a frequency modulation topology no-load control circuit and a control method thereof, and belongs to the technical field of circuit control. The circuit comprises a transformer, and a primary side driving circuit comprises a first primary side insulated gate bipolar transistor, a second primary side insulated gate bipolar transistor, a third primary side insulated gate bipolar transistor and a fourth primary side insulated gate bipolar transistor, wherein the first primary side insulated gate bipolar transistor and the second primary side insulated gate bipolar transistor are connected in series; the third primary side insulated gate bipolar transistor and the fourth primary side insulated gate bipolar transistor are connected in series; a series circuit of the first primary side insulated gate bipolar transistor and the second primary side insulated gate bipolar transistor and a series circuit of the third primary side insulated gate bipolar transistor and thefourth primary side insulated gate bipolar transistor are connected in parallel and then are connected with a first capacitor; reverse energy transmission enables a module to achieve a voltage stabilization effect at a low switching frequency without adopting a high frequency or hiccup mode to achieve voltage stabilization.

Description

technical field [0001] The invention relates to a frequency modulation topology no-load control circuit and a control method thereof, belonging to the technical field of circuit control. Background technique [0002] The topology of frequency modulation soft switching is widely used in servers and communication power supplies, but in the case of no load, high frequency or hiccup mode is used to maintain the output voltage stability. The high frequency in the FM topology no-load control circuit in the prior art will bring additional electromagnetic compatibility problems, and the hiccup mode will bring the problem of large output voltage ripple. Therefore, how to avoid the use of high frequency and hiccup mode to maintain the output voltage stability during no-load has become an urgent technical problem to be solved. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the object of the present invention is to provide a frequency modulation topol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCH02M3/3353
Inventor 陈立锋张营孙九瑞
Owner JINING UNIV