Electric energy storage and charge-discharge control circuit

Abstract

The invention discloses an electric energy storage and charge-discharge control circuit. The input end is used for receiving commercial power, the input end is connected with the AC / DC converter, and the input end is grounded through a resistor R1, a resistor R2 and a resistor R3; the control end of the switch tube Q1 is connected with the resistor R2, one end of the conduction end of the switch tube Q1 is grounded, and the other end of the switch tube Q1 is connected with a voltage VCC through a resistor R4; one end of a control end of the switch unit U1 is connected with the resistor R4, the other end of the switch unit U1 is grounded, one end of a conduction end of the switch unit U1 is connected with the AC / DC converter through an electrolytic capacitor EC1, the other end of the conduction end of the switch unit U1 is grounded, and a diode D3 is connected between the conduction end and the other end of the switch unit U1. And the output current of the LED power supply can be slowly reduced within a certain time after the lamp is turned off, so that the effect of slowly turning off the LED lamp after the lamp is turned off is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of LED power supply, in particular to a kind of electric energy storage and charge-discharge control circuit. BACKGROUND

[0002] The existing LED power supply when wall switch is turned off, power output current will quickly drop to zero, the brightness of LED lamp is quickly extinguished, so in the dark night, the sudden change of the brightness of human eye will feel uncomfortable, if the output current of LED power supply can be slowly reduced in a certain time when shutting down, the brightness change will not be so sudden, will greatly improve the comfort of use.

[0003] The current application mode is to use wireless intelligent module to control the slow decline of the output current of power supply, mainly two control modes, one is to use specially made wall switch to realize, this wall switch is similar to a reset switch, the switch is turned off when the button is pressed, and is automatically closed after being released, to ensure that AC power supply is only disconnected for a short time;Two is to use ordinary wall switch, keep AC power supply continuously exist, through other wireless intelligent switch or APP to control the slow decline of the output current of LED power supply.

[0004] Using intelligent LED power supply, one is that the mains is not turned off, so there is a certain power consumption after turning off the light, which is not conducive to energy saving;Second, the cost is high, if special wall switch is used, the cost will be further increased;Third, if APP is used for control, the operation complexity is increased. SUMMARY

[0005] To solve the above problems, the technical scheme provides an electric energy storage and charge-discharge control circuit.

[0006] To achieve the above object, the technical scheme is as follows: An electric energy storage and charge-discharge control circuit, comprising: Input end for receiving mains, the input end is connected with AC / DC converter, the input end is grounded through resistance R1, resistance R2 and resistance R3; Switch tube Q1, the control end is connected with the resistance R2, one end of the conduction end is grounded, and the other end is connected with voltage VCC through resistance R4, VCC can be provided by switching power supply itself, or can be provided by other power supply module; Switching unit U1, one end of the control end is connected with the resistance R4, and the other end is grounded, one end of the conduction end is connected with the AC / DC converter through electrolytic capacitor EC1, and the other end is grounded, and the conduction end of the switching unit U1 is connected with diode D3.

[0007] In some embodiments, the resistance R3 is connected with capacitor C2 in parallel.

[0008] In some embodiments, the resistor R3 is further connected in parallel with a Zener diode ZD1.

[0009] In some embodiments, the two ends of the input terminal are respectively provided with diode D1 and diode D2, and the output terminals of diode D1 and diode D2 are connected together and then connected to resistor R1.

[0010] In some embodiments, the input terminal is connected to the AC / DC converter via a rectifier bridge BD1.

[0011] In some embodiments, the output terminal of the rectifier bridge BD1 outputs a voltage, which is grounded through capacitor C1.

[0012] In some embodiments, the switching transistor Q1 is a bipolar transistor or a MOSFET.

[0013] In some embodiments, the switching unit U1 is a relay, optocoupler, or photoelectric control switch.

[0014] The beneficial effects of this application are: This application adds an energy storage circuit to a conventional switching power supply. In conjunction with other control circuits, it can achieve a slow decrease in the output current of the LED power supply within a certain period of time after the light is turned off, thus achieving the effect of slow-off LED lights. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0016] Figure 1 This is a structural schematic diagram of an embodiment of the present invention. Figure One ; Figure 2 This is a structural schematic diagram of an embodiment of the present invention. Figure Two . Detailed Implementation

[0017] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0018] Please refer to Figure 1 As shown, an energy storage and charging / discharging control circuit includes: The input terminal is used to receive mains power. The input terminal is connected to the AC / DC converter. The input terminal is grounded through resistors R1, R2 and R3. The switching transistor Q1 has its control terminal connected to the resistor R2, and one end of its conducting terminal is grounded, while the other end is connected to the voltage VCC through the resistor R4. The switching unit U1 has one control terminal connected to the resistor R4 and the other terminal grounded. One conduction terminal is connected to the AC / DC converter through the electrolytic capacitor EC1, and the other conduction terminal is grounded. A diode D3 is connected between the conduction terminal and the other terminal of the switching unit U1.

[0019] After the power supply is powered on, the AC mains power charges the electrolytic capacitor EC1 through the rectifier bridge BD1 and diode D3. Due to the voltage division of R1, R2 and R3 (where C2 provides filtering and ZD1 provides voltage regulation, which can be selected to be used according to the actual debugging results), the base of transistor Q1 is turned on, the SA point voltage of solid-state relay U1 is pulled to ground, and the internal switching transistor of U1 connected in parallel across D3 is turned off. After EC1 is fully charged, it stores energy and does not participate in the power supply operation. When the power is turned off, the AC power supply is disconnected. At this time, the base of Q1 is grounded through resistor R3, Q1 is turned off, and VCC supplies power to the internal LED of U1 through resistor R4. The internal switch of U1 connected in parallel across D3 is turned on, and EC1 is connected to the power supply circuit to provide energy for the power supply to continue to work. In this way, when the mains power is connected, the electrolytic capacitor EC1 is charged. At this time, the base of the transistor Q1 is energized, causing the transistor Q1 to conduct. Point A is grounded, which causes the relay U1 to disconnect. Only after the mains power is disconnected can the voltage VCC be supplied to the relay U1 through the resistor R4, so that the electrolytic capacitor EC1 is grounded and forms a circuit, continuously supplying power to the circuit until the electrolytic capacitor EC1 is depleted.

[0020] refer to Figure 2 This is Example 2, which adds a boost converter to Example 1.

[0021] In the above embodiment, the resistor R3 is connected in parallel with the capacitor C2 to provide filtering.

[0022] In the above embodiment, the resistor R3 is also connected in parallel with a Zener diode ZD1 to provide voltage regulation.

[0023] In the above embodiment, the two ends of the input terminal are respectively provided with diode D1 and diode D2. The output terminals of diode D1 and diode D2 are connected together and then connected to resistor R1. Alternatively, a rectifier bridge can be used instead.

[0024] In the above embodiment, the input terminal is connected to the AC / DC converter through the rectifier bridge BD1.

[0025] In the above embodiment, the output terminal of the rectifier bridge BD1 outputs a voltage, which is grounded through capacitor C1. This voltage can replace voltage VCC for power supply.

[0026] In the above embodiments, the switching transistor Q1 is a bipolar transistor or a MOSFET.

[0027] In the above embodiments, the switching unit U1 is a relay, optocoupler, or photoelectric control switch.

[0028] The above description is only a preferred embodiment of this application and is not intended to limit the scope of implementation of this application. Any other embodiments whose principles and basic structures are the same as or similar to those of this application are within the protection scope of this application.

Claims

1. An energy storage and charging / discharging control circuit, characterized in that, include; The input terminal is used to receive mains power. The input terminal is connected to the AC / DC converter. The input terminal is grounded through resistors R1, R2 and R3. The switching transistor Q1 has its control terminal connected to the resistor R2, and one end of its conducting terminal is grounded, while the other end is connected to the voltage VCC through the resistor R4. The switching unit U1 has one control terminal connected to the resistor R4 and the other terminal grounded. One conduction terminal is connected to the AC / DC converter through the electrolytic capacitor EC1, and the other conduction terminal is grounded. A diode D3 is connected between the conduction terminal and the other terminal of the switching unit U1.

2. The energy storage and charging / discharging control circuit according to claim 1, characterized in that: The resistor R3 is connected in parallel with a capacitor C2.

3. The energy storage and charging / discharging control circuit according to claim 2, characterized in that: The resistor R3 is also connected in parallel with a Zener diode ZD1.

4. The energy storage and charge / discharge control circuit according to claim 1, characterized in that: The two ends of the input terminal are respectively equipped with diode D1 and diode D2, and the output terminals of diode D1 and diode D2 are connected together and then connected to resistor R1.

5. The energy storage and charging / discharging control circuit according to claim 1, characterized in that: The input terminal is connected to the AC / DC converter via rectifier bridge BD1.

6. The energy storage and charge / discharge control circuit according to claim 5, characterized in that: The rectifier bridge BD1 outputs a voltage, which is grounded through capacitor C1.

7. The energy storage and charging / discharging control circuit according to claim 1, characterized in that: The switching transistor Q1 is a bipolar transistor or a MOSFET.

8. The energy storage and charging / discharging control circuit according to claim 1, characterized in that: The switching unit U1 is a relay, optocoupler, or photoelectric control switch.

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