Novel floating ground power supply circuit

Abstract

An embodiment of the utility model provides a novel floating power supply circuit, which comprises a transformer, a first diode and a second diode, the transformer comprises a primary winding and a secondary winding corresponding to the primary winding, and the secondary winding is connected with the first diode, the second diode, a first capacitor, a second capacitor and an inductor. According to the floating ground power supply circuit, the number of power supply windings of the transformer is reduced by arranging the first diode and the second diode, so that the functional requirements of the floating ground power supply circuit are met, the labor cost and the product production cost are saved, and the positive effects that the circuit is simple and practical, the cost is low, and the product efficiency is high are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic equipment, in particular to a novel floating power supply circuit. Background Art

[0002] With the rapid development of the economy and society, a growing number of electronic devices are being used. To ensure the safety of electronic devices, grounding technology is also rapidly developing. As customer demand for electronic devices increases, the requirements for circuit design are also increasing. Using complex circuit structures increases product size and cost.

[0003] In the existing floating power supply circuit, multiple groups of output power supply circuits sense the primary voltage of the transformer to the secondary, and output the voltage after rectification by multiple secondary windings. This circuit structure increases labor costs and transformer copper wire costs, which in turn leads to higher costs for the entire product. Utility Model Content

[0004] In order to solve the problem of high cost of floating power supply circuits in the prior art, the present invention provides a new floating power supply circuit. The specific technical solution is as follows:

[0005] In the first aspect of the embodiment of the utility model, a new floating power supply circuit is first provided, which includes: a transformer, a first diode and a second diode, the transformer includes a primary winding and a corresponding secondary winding, and the secondary winding is connected to the first diode, the second diode, the first capacitor, the second capacitor and the inductor.

[0006] In combination with the first aspect, in an optional embodiment of the present application, the primary winding is connected to the transformer core, and the secondary winding is coupled through the core. One end of the secondary winding is connected to the first capacitor and the inductor, and the other end is connected to the positive end of the first diode and the negative end of the second diode. One end of the first capacitor, the third capacitor and the resistor is grounded or the negative end of the power supply output. The other end of the third capacitor, the inductor and the resistor is connected to the positive end of the power supply output. The negative pole of the first diode is connected to the positive pole of the second capacitor and the power supply voltage, and the negative pole of the second capacitor is grounded.

[0007] The technical solution provided by the embodiment of the present utility model is a new floating power supply circuit, including: a transformer, a first diode and a second diode. The transformer includes a primary winding and a corresponding secondary winding. The secondary winding is connected to the first diode, the second diode, the first capacitor, the second capacitor and the inductor. In this solution, the number of transformer power supply windings is reduced by providing the first diode and the second diode, thereby saving labor costs and product costs while meeting the functional requirements of the floating power supply circuit, achieving the positive effects of simple and practical circuits, low design costs and production costs, and more efficient products. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The accompanying drawings are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention.

[0009] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0010] Figure 1 It is a structural schematic diagram of a floating power supply circuit shown in the prior art;

[0011] Figure 2 This is a schematic diagram of a novel floating power supply circuit shown in an embodiment of the present utility model. DETAILED DESCRIPTION

[0012] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0013] Figure 1 The structure diagram of the floating power supply circuit in the prior art is shown. Figure 1As shown, in the existing floating power supply circuit, the primary winding corresponds to secondary winding 1 and secondary winding 2, with diode D1 connected to secondary winding 1 and diode D2 connected to secondary winding 2. In this floating power supply circuit, its multiple output power supply circuits sense the primary voltage of the transformer to the secondary, and then output the voltage after rectification by multiple secondary windings. This method leads to increasing manual design costs and transformer copper wire costs, and leads to increased product production costs. Based on this, the embodiments of the present application provide a floating power supply circuit, and the following specific embodiments will be used to introduce this solution in detail.

[0014] The novel floating power supply circuit in this embodiment includes: a transformer, a first diode and a second diode. The transformer includes a primary winding and a corresponding secondary winding. The secondary winding is connected to the first diode, the second diode, the first capacitor, the second capacitor and the inductor.

[0015] Specifically, in an optional embodiment of the present application, the above-mentioned primary winding is connected to the transformer core, and the secondary winding is coupled through the magnetic core. One end of the secondary winding is connected to the first capacitor and the inductor, and the other end is connected to the positive end of the first diode and the negative end of the second diode. One end of the above-mentioned first capacitor, third capacitor and resistor is grounded or the negative end of the power supply output, and the other end of the above-mentioned third capacitor, inductor and resistor is connected to the positive end of the power supply output. The negative pole of the above-mentioned first diode is connected to the positive pole of the second capacitor and the power supply voltage, and the negative pole of the above-mentioned second capacitor is grounded.

[0016] Figure 2 This is a schematic diagram of a novel floating power supply circuit according to a specific embodiment of the present application. Figure 2 As shown, in this embodiment, the floating power supply circuit includes a transformer T1, a first diode D1, and a second diode D2. The primary winding of the transformer T1 is connected to a transformer core, and the secondary winding of T1 is coupled through the core. One end of the secondary winding of T1 is connected to a first capacitor C1 and an inductor L1, and the other end is connected to the positive end of the first diode D1 and the negative end of the second diode D2. One end of the first capacitor C1, the third capacitor C3, and the resistor RL is directly connected to the negative end of Vout or GND; the other ends of the third capacitor C3, the inductor L1, and the resistor RL are connected to the positive end of Vout. The cathode of the first diode D1 is connected to the positive end of the second capacitor C2 and VCC; and the negative end of the second capacitor C2 is connected to GND.

[0017] In this embodiment, the AC voltage is rectified and filtered before being fed to the primary winding of T1. It is then coupled to the secondary winding using the transformer principle. It is filtered by the first capacitor C1, the inductor L1, and the third capacitor C3, before being fed to the inductor RLVout. The VCC voltage is rectified by the first diode D1. The second diode D2 is connected to ground in reverse order, creating a floating voltage. After filtering by the second capacitor C2, the VCC output voltage is achieved. The floating power supply circuit provided in this embodiment is simple and practical, with a stable output voltage, improving product stability.

[0018] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0019] Each embodiment in this specification is described in a related manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiment is generally similar to the method embodiment, so the description is relatively simple. For related parts, refer to the description of the method embodiment.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A novel floating power supply circuit, characterized in that: The circuit comprises: a transformer, a first diode and a second diode. The transformer comprises a primary winding and a corresponding secondary winding. The secondary winding is connected to the first diode, the second diode, the first capacitor, the second capacitor and the inductor.

2. The circuit according to claim 1, characterized in that The primary winding is connected to the transformer core, and the secondary winding is coupled through the core. One end of the secondary winding is connected to the first capacitor and the inductor, and the other end is connected to the positive end of the first diode and the negative end of the second diode. One end of the first capacitor, the third capacitor and the resistor is grounded or the negative end of the power supply output. The other ends of the third capacitor, the inductor and the resistor are connected to the positive end of the power supply output. The negative electrode of the first diode is connected to the positive electrode of the second capacitor and the power supply voltage, and the negative electrode of the second capacitor is grounded.

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