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Soft start circuit, method and electrical equipment

A soft start circuit and soft start technology, applied in the field of soft start, can solve problems such as abnormal sound of power modules, feedback loop ripple interference, etc., and achieve the effect of improving quality

Active Publication Date: 2020-10-13
GUANGZHOU SHIYUAN ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a soft start circuit, method and electrical equipment to at least solve the problem that the feedback signal of the soft start circuit is always connected to the feedback loop in the related art, causing the feedback loop to introduce ripple interference and the power module to produce abnormal sound question

Method used

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  • Soft start circuit, method and electrical equipment
  • Soft start circuit, method and electrical equipment
  • Soft start circuit, method and electrical equipment

Examples

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Embodiment 1

[0030] Before describing further details of the various embodiments of the present application, reference will be made to figure 1 An optional soft-start circuit that can be used to implement the principles of the present application is described. In its most basic configuration, the figure 1 is a schematic structural diagram of a soft start circuit according to an embodiment of the present invention. The architecture depicted is only one example of a suitable environment for descriptive purposes and is not intended to suggest any limitation as to the scope of use or functionality of the application. Neither should this circuit be interpreted as a figure 1 Any one or combination of components shown may have any dependencies or requirements.

[0031] like figure 1 As shown, the soft-start circuit provided by this application includes:

[0032] A power module, a load, and a soft start module coupled between the power module and the load.

[0033] In an optional solution, t...

Embodiment 2

[0061] Under the soft-start circuit provided by Embodiment 1, this embodiment provides a soft-start method from the perspective of the control module. It should be noted that the steps shown in the flow chart of the accompanying drawings can Instructions are executed in a computer system and, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

[0062] Figure 4 is an optional soft start method according to the embodiment of the present invention, such as Figure 4 As shown, the method is applied to a soft-start circuit. The soft-start circuit includes a power module, a soft-start module, a load, and a control module connected in sequence. The soft-start circuit is also connected to the control module. The soft-start method includes the following steps:

[0063] Step S402, acquiring the first feedback signal from the soft start module and the second feedback...

Embodiment 3

[0077] According to an embodiment of the present invention, an electric device is provided, including the soft start circuit of the above-mentioned embodiment 1.

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Abstract

The invention discloses a soft start circuit, a soft start method and electric equipment. The soft start circuit comprises a power source module, a load, a soft start module coupled between the powersource module and the load, and a control module; the input end of the control module is connected with the soft start module and the load; the output end of the control module is connected with the power source module; and the control module is used for outputting control signals according to first feedback signals from the soft start module, second feedback signals from the load and a referencevoltage and adjusting current flowing through the load based on the control signals; and the soft start module comprises a buffer circuit used for attenuating the first feedback signals after a soft start process is finished and before the first feedback signals enter the control module. According to a soft start circuit in the prior art, the first feedback signals of the soft start circuit alwaysenter a feedback loop, and as a result, ripple interference is introduced into the feedback loop and abnormal noises appear in a power source module due, however, with the soft start circuit of the invention adopted, technical problems in the prior art can be solved.

Description

technical field [0001] The invention relates to the field of soft start, in particular to a soft start circuit, method and electrical equipment. Background technique [0002] In the process of starting electrical equipment, there are often overvoltage or overcurrent phenomena, which damage the service life of components, and in severe cases, electrical equipment can be burned. In the prior art, a soft start method is usually used to overcome this problem. [0003] The so-called soft start means that the voltage is gradually increased from zero to the rated voltage, so that there is no impulse voltage or impulse current in the whole process of starting the components (including electrical equipment), but the smooth start operation, reducing the impulse voltage or impulse current The impact on components, to achieve the purpose of protecting the circuit. At present, the working principle of the soft-start circuit is generally to introduce part of the start-up voltage into th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/36H02M3/335
CPCH02M1/36H02M3/335
Inventor 邓国健
Owner GUANGZHOU SHIYUAN ELECTRONICS CO LTD
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