Low-power power supply for low-power and low-power electric appliance
By using composite capacitors and rectifier bridge stacks in the power supply for step-down and current reduction, the problems of excessive current and current loss are solved, and an efficient and compact power supply design is achieved, suitable for low-power electrical appliances.
Patent Information
- Application Number
- CN202323085303.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-15
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2033-11-15
AI Technical Summary
The power supply of existing low-power electrical appliances is likely to cause excessive current or current loss during the step-down and current reduction process, and the capacitor is large in size and occupy space.
A composite capacitor consisting of two electrolytic capacitors, a diode and resistor are connected in parallel, connected in series at the power input, and bucking and de-current through the rectifier bridge stack to ensure that the current and voltage are reduced without loss, and the capacitance is adjusted appropriately to control it. volume.
It achieves no loss-reducing of AC current and has a large capacity. It is suitable for low-power electrical appliances and provides an efficient and compact power solution.
Smart Images
Figure CN222215486U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power supply, in particular to a low-power power supply for low-power electrical appliances. Background Art
[0002] There are several ways to power low-power electrical appliances: directly use 220V AC, but the current is too large and the appliance is easily damaged; use voltage coupling to reduce voltage and current, but the transformer itself will produce current loss; use non-polar capacitors to reduce voltage and current, but when the capacitance is large, the capacitor volume must also be correspondingly large, occupying space. Utility Model Content
[0003] The utility model aims to provide a low-power power supply for low-power electrical appliances, which can solve the problem that the existing power supply current is too large to easily damage the electrical appliances or the power supply generates current loss during the voltage and current reduction process.
[0004] In order to solve the above problems, the technical solution adopted by the utility model is: the power supply includes a composite capacitor formed by connecting the negative electrodes of two electrolytic capacitors, and a diode is connected in parallel at both ends of the composite capacitor; there are two composite capacitors, namely a composite capacitor C1 and a composite capacitor C2, the composite capacitor C1 is connected in series to the A-end line of the power input end, and the two ends of the composite capacitor C1 are connected in parallel with a diode D1, and then in parallel with a resistor R1; the composite capacitor C2 is connected in series to the B-end line of the input end, and the two ends of the composite capacitor C2 are connected in parallel with a diode D2, and then in parallel with a resistor R2.
[0005] In the above-mentioned technical solution of a low-power power supply for low-power electrical appliances, a more specific technical solution may also be:
[0006] The output end of the composite capacitor is connected to a rectifier bridge stack D.
[0007] Furthermore, an electrolytic capacitor C3 and a resistor R3 are connected in parallel between the D3 pin and the D4 pin of the rectifier bridge stack D.
[0008] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:
[0009] 1. Since the composite capacitor is connected in series at the two input ends of the power supply, the composite capacitor is composed of two electrolytic capacitors with the negative poles connected together, which can reduce the current and voltage of the alternating current. The electrolytic capacitor has no loss in the process of reducing the current and voltage of the alternating current, and when the capacitance is large, the volume will not be very large. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 This is a schematic diagram of an AC power supply circuit in Embodiment 1 of the present utility model.
[0011] Figure 2 This is a schematic diagram of a DC power supply circuit according to Embodiment 2 of the present utility model. DETAILED DESCRIPTION
[0012] The utility model is further described in detail below in conjunction with the accompanying drawings:
[0013] like Figure 1 Embodiment 1 shown is an AC power supply. A composite capacitor C1 and a composite capacitor C2 are respectively connected in series at the two input ends of the AC power supply, namely, the input end A and the input end B. The composite capacitor C1 is connected in series to the input end A circuit. A diode D1 is connected in parallel to both ends of the composite capacitor C1, and then a resistor R1 is connected in parallel. The composite capacitor C2 is connected in series to the input end B circuit. A diode D2 is connected in parallel to both ends of the composite capacitor C2, and then a resistor R2 is connected in parallel. The composite capacitor is composed of two electrolytic capacitors whose negative electrodes are connected to reduce the current and voltage of the AC power. The electrolytic capacitor has no loss in the process of reducing the current and voltage of the AC power, and when the capacitance is large, the volume will not be very large.
[0014] The working process is:
[0015] Input 220V AC power is input to input terminals A and B. When the AC power is in the positive half cycle, the current flows from input terminal A to terminal B, and the current path is: terminal A, composite capacitor C1, output terminal E, load, output terminal F, composite capacitor C2, terminal B; when the AC power is in the negative half cycle, the current flows from segment B to terminal A, and the current path is: terminal B, composite capacitor C2, output terminal F, load, output terminal E, composite capacitor C1, terminal A, completing the entire AC cycle, and then repeating the next AC cycle, working in an uninterrupted cycle. Composite capacitors C1 and C2 reduce the voltage and current of the AC power, and composite capacitors C1 and C2 use different capacitances to obtain currents of different sizes.
[0016] like Figure 2The present embodiment 2 shown is a DC power supply. A composite capacitor C1 and a composite capacitor C2 are connected in series at the two input ends of the power supply, namely the input end A and the input end B, respectively. The composite capacitor C1 is connected in series to the input end A line. The two ends of the composite capacitor C1 are connected in parallel with a diode D1, and then in parallel with a resistor R1. The composite capacitor C2 is connected in series to the input end B line. The two ends of the composite capacitor C2 are connected in parallel with a diode D2, and then in parallel with a resistor R2. A rectifier bridge D is connected to the output end of the composite capacitor. The two ends of the composite capacitor C1 are connected in parallel with a diode D1 and a resistor R1, and then connected to the D1 pin of the rectifier bridge D. The two ends of the composite capacitor C2 are connected in parallel with a diode D2 and a resistor R2, and then connected to the D2 pin of the rectifier bridge D. An electrolytic capacitor C3 and a resistor R3 are connected in parallel between the D3 pin and the D4 pin of the rectifier bridge D. The input end A and the input end B are AC current input ends, and the E end and the F end are DC current output ends.
[0017] 220V AC is input to input terminals A and B. When the AC is in the positive half cycle, the current flows from terminal A to terminal B, and the current path is: terminal A, composite capacitor C1, D1 pin input AC, and after rectification by rectifier bridge stack D, D3 pin outputs DC. The current path is: D3 pin, E terminal, load, F terminal, D4 pin, D2 pin, capacitor D2, input terminal B; when the AC is in the negative half cycle, the current flows from terminal A to terminal B, and the current path is: terminal B, composite capacitor C2, D2 pin input AC, and after rectification by rectifier bridge stack D, D3 pin outputs DC. The current path is: D3 pin, E terminal, load, F terminal, D4 pin, D1 pin, capacitor D1, input terminal A. Complete the work of the entire AC cycle, and then enter the next AC cycle to work continuously; the composite capacitor C1 and the composite capacitor C2 reduce the voltage and current of the AC power, and the composite capacitor C1 and the composite capacitor C2 use different capacitances to obtain currents of different sizes; the rectifier bridge D converts the AC power into DC power, the diode D1 and the diode D2 are the DC path, and the resistor R1 and the resistor R2 are the discharge path.
[0018] The utility model is applicable to various low-power electrical appliances. The working voltage and current required by low-power electrical appliances are relatively small, and the 220V AC power must be reduced in voltage and current before it can be used. When the utility model is used to reduce the voltage and current of AC power, it has no loss, small size, and is simple and easy to use, and is very suitable for the power supply used by low-power electrical appliances.
Claims
1. A low-power power supply for low-power electrical appliances. Features: The power supply includes a composite capacitor formed by connecting the negative electrodes of two electrolytic capacitors, and diodes are connected in parallel at both ends of the composite capacitor; there are two composite capacitors, namely composite capacitor C1 and composite capacitor C2, composite capacitor C1 is connected in series to the A-end line of the power input end, and diode D1 is connected in parallel to both ends of the composite capacitor C1, and then resistor R1 is connected in parallel; composite capacitor C2 is connected in series to the B-end line of the input end, and diode D2 is connected in parallel to both ends of the composite capacitor C2, and then resistor R2 is connected in parallel.
2. The low-power power supply for low-power electrical appliances according to claim 1, Features: The output end of the composite capacitor is connected to a rectifier bridge stack D.
3. The low-power power supply for low-power electrical appliances according to claim 2, Features: An electrolytic capacitor C3 and a resistor R3 are connected in parallel between the D3 pin and the D4 pin of the rectifier bridge stack D.