Voltage doubling circuit with protection function

Abstract

The utility model relates to a voltage doubling circuit with a protection function, which is provided with a voltage sampling circuit, and the voltage sampling circuit comprises a resistor assembly, a clamping diode assembly, an RC low-pass filter, a ninth resistor, a triode and a buzzer. The clamping diode assembly is used for realizing a voltage clamping function so as to control an input voltage at a PB10 pin of a chip within a preset range, and the triode is connected with the relay assembly and is used for controlling conduction of the relay assembly so as to protect components in the voltage doubling circuit from being damaged. The buzzer is used for giving an alarm to remind an operator to pay attention to voltage abnormity. The voltage doubling circuit provided by the utility model can monitor the input voltage in real time, and ensures that the voltage doubling circuit can work safely and reliably under different input voltages.

Description

Technical Field

[0001] The utility model belongs to the technical field of voltage doubling circuits, and in particular relates to a voltage doubling circuit with a protection function. Background Art

[0002] A voltage doubler circuit is a circuit that can multiply the input voltage and is widely used in electronic devices. In existing voltage doubler circuit designs, a combination of diodes and capacitors is usually used to achieve voltage doubling. The basic working principle of this circuit is to utilize the charge and discharge characteristics of the capacitor to accumulate voltage in each AC cycle, ultimately achieving the purpose of doubling the input voltage.

[0003] However, existing voltage doubling circuits have the following disadvantages: 1. They lack an effective protection mechanism. When the circuit is mistakenly connected to a 220V input voltage, the capacitors may burn out easily due to insufficient withstand voltage, causing the entire circuit to malfunction. 2. They cannot automatically adapt to different input voltages and require users to manually adjust or replace circuit components, which not only increases the complexity of operation but also reduces the safety and reliability of the circuit.

[0004] Therefore, the utility model provides a voltage doubling circuit with a protection function to solve the above technical problems. Utility Model Content

[0005] In response to the above problems, the purpose of the present invention is to provide a voltage doubling circuit with a protection function, which is provided with a voltage sampling circuit that can monitor the input voltage in real time to ensure that the voltage doubling circuit can operate safely and reliably under different input voltages.

[0006] The utility model provides a voltage doubling circuit with a protection function, comprising a voltage doubling circuit for amplifying an input AC voltage by two times and converting it into a DC voltage VBus, a relay component connected to the voltage doubling circuit for controlling the on / off of the voltage doubling circuit, a voltage sampling circuit connected to the DC voltage VBus output end of the voltage doubling circuit, a chip connected to the voltage sampling circuit and having a data transmission interactive interface, and a power supply VCC for powering the chip, wherein the data transmission interactive interface has pins PB8-PB10; the voltage sampling circuit comprises a resistor component, a clamping diode component, an RC low-pass filter, a ninth resistor, a transistor, and a buzzer, wherein a first end of the resistor component is connected to the DC voltage VBus output end of the voltage doubling circuit The second end of the resistor component is connected to the first end of the clamping diode component, the first end of the RC low-pass filter and the PB10 pin of the chip, the second end of the clamping diode component is connected to the power supply VCC, the third end of the clamping diode component is connected to the second end of the RC low-pass filter, and the third end of the RC low-pass filter is grounded; the first end of the ninth resistor is connected to the PB9 pin of the chip, the second end of the ninth resistor is connected to the base of the transistor, the collector of the transistor is connected to the relay component for controlling the closing and opening of the relay component, and the emitter of the transistor is grounded; the first end of the buzzer is connected to the PB8 pin of the chip, and the second end of the buzzer is grounded.

[0007] Preferably, the resistor component includes a fourth resistor, a fifth resistor, a sixth resistor and a seventh resistor arranged in series; the clamping diode component includes a first clamping diode and a second clamping diode; the RC low-pass filter includes an eighth resistor and a capacitor arranged in parallel; the seventh resistor is connected to the DC voltage VBus output end of the voltage doubling circuit, the fourth resistor is simultaneously connected to the positive end of the first clamping diode, the negative end of the second clamping diode, the first end of the eighth resistor and the first end of the capacitor, the negative end of the first clamping diode is connected to the power supply, and the positive end of the second clamping diode is simultaneously connected to the second end of the eighth resistor and the second end of the capacitor and then grounded.

[0008] Preferably, the relay assembly includes a first relay and a second relay connected to each other, and the collector of the transistor is connected to the first relay and the second relay at the same time.

[0009] Compared with the related art, the present invention provides a voltage doubling circuit with a protection function, comprising a voltage doubling circuit, a relay assembly, a voltage sampling circuit, a chip, and a power supply VCC; the voltage sampling circuit comprises a resistor assembly, a clamping diode assembly, an RC low-pass filter, a ninth resistor, a transistor, and a buzzer; a first end of the resistor assembly is connected to a DC voltage VBus output end of the voltage doubling circuit; a second end of the resistor assembly is connected to the first end of the clamping diode assembly, the first end of the RC low-pass filter, and the PB10 pin of the chip; a second end of the clamping diode assembly is connected to the power supply VCC; a third end of the clamping diode assembly is connected to the second end of the RC low-pass filter; and the third end of the RC low-pass filter is grounded; a first end of the ninth resistor is connected to the PB9 pin of the chip; a second end of the ninth resistor is connected to the base of the transistor; a collector of the transistor is connected to the relay assembly for controlling the closing and opening of the relay assembly; and the emitter of the transistor is grounded; a first end of the buzzer is connected to the PB8 pin of the chip, and a second end of the buzzer is grounded. In the above structure, the voltage sampling circuit effectively controls the input voltage within a safe range, while also providing filtering, noise reduction, and voltage spike absorption, thereby improving circuit stability and safety. Furthermore, the automatic control function of the relay assembly and the buzzer alarm further enhance the circuit's self-protection capabilities and reminder functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The utility model is a circuit structure diagram of a voltage doubling circuit with a protection function. DETAILED DESCRIPTION

[0011] The utility model provides a voltage doubling circuit with a protection function, aiming to solve the problem that when the existing voltage doubling circuit is mistakenly connected to a high input voltage, the capacitor is easily burned due to insufficient voltage resistance, thereby making the entire circuit unable to work normally.

[0012] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only 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 are within the scope of protection of the present invention.

[0013] Please see the attached Figure 1As shown, the utility model provides a voltage doubling circuit with a protection function, which includes a voltage doubling circuit 1 for amplifying an input AC voltage by two times and converting it into a DC voltage VBus, a relay component 2 connected to the voltage doubling circuit 1 for controlling the on and off of the voltage doubling circuit 1, a voltage sampling circuit 3 connected to the DC voltage VBus output end of the voltage doubling circuit 1, a chip 4 connected to the voltage sampling circuit 3 and having a data transmission interaction interface, and a power supply VCC for powering the chip 4, wherein the data transmission interaction interface has PB8-PB10 pins; the voltage sampling circuit 3 includes a resistor component 31, a clamping diode component 32, an RC low-pass filter 33, a ninth resistor R9, a transistor Q1 and a buzzer BUZ1, wherein the first end of the resistor component 31 is connected to the DC voltage VBus output end of the voltage doubling circuit 1, and the The second end of the resistor component 31 is connected to the first end of the clamping diode component 32, the first end of the RC low-pass filter 33 and the PB10 pin of the chip 4, the second end of the clamping diode component 32 is connected to the power supply VCC, the third end of the clamping diode component 32 is connected to the second end of the RC low-pass filter 33, and the third end of the RC low-pass filter 33 is grounded; the first end of the ninth resistor R9 is connected to the PB9 pin of the chip 4, the second end of the ninth resistor R9 is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to the relay component 2 for controlling the closing and opening of the relay component 2, and the emitter of the transistor Q1 is grounded; the first end of the buzzer BUZ1 is connected to the PB8 pin of the chip 4, and the second end of the buzzer BUZ1 is grounded.

[0014] In the above structure, the clamping diode assembly 32 is configured to control the input voltage at the PB10 pin of the chip 4 within a safe range, thereby realizing a voltage clamping function. The RC low-pass filter 33 is configured to filter out high-frequency noise, remove noise, and absorb voltage spikes, thereby improving the stability and safety of the voltage doubler circuit. The conduction of the relay assembly 2 is controlled by the transistor Q1. When the DC voltage VBus is detected to exceed the safe range, the PB9 pin of the chip 4 outputs a low level, the transistor Q1 is turned off, and no current flows through the coil of the relay assembly 2, and the relay assembly 2 is disconnected, thereby protecting the circuit from damage by high voltage. Conversely, when the DC voltage VBus is detected to be less than a preset range, the PB9 pin of the chip 4 outputs a high level, the transistor Q1 is saturated, and the relay assembly 2 is attracted, enabling the voltage doubler circuit 1 to operate normally, having an automatic control function and realizing self-protection of the voltage doubler circuit 1. When the DC voltage VBus is detected to exceed the safe range, the PB8 pin of the chip outputs a high level, and the buzzer BUZ1 emits an audible alarm to alert the operator to the voltage abnormality.

[0015] In this embodiment, the resistor component 31 includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a seventh resistor R7 arranged in series; the clamping diode component 32 includes a first clamping diode and a second clamping diode; the RC low-pass filter includes an eighth resistor R8 and a capacitor C2 arranged in parallel; the seventh resistor R7 is connected to the DC voltage VBus output end of the voltage multiplier circuit 1, the fourth resistor R4 is simultaneously connected to the positive terminal of the first clamping diode, the negative terminal of the second clamping diode, the first end of the eighth resistor R8, and the first end of the capacitor C2, the negative terminal of the first clamping diode is connected to the power supply VCC, and the positive terminal of the second clamping diode is simultaneously connected to the second end of the eighth resistor R8 and the second end of the capacitor C2 and then grounded.

[0016] Specifically, the relay assembly 2 includes a first relay K1 and a second relay K2 connected to each other, and the collector of the transistor Q1 is connected to both the first relay K1 and the second relay K2.

[0017] To further illustrate the present invention, taking the input voltage of the voltage doubling circuit as 110V as an example, some components in the voltage sampling circuit are illustrated:

[0018] The use of the first clamping diode and the second clamping diode realizes a voltage clamping function. Under the ideal condition that the conduction voltage drops of the first clamping diode and the second clamping diode are ignored, the first clamping diode and the second clamping diode can control the input voltage Vout at the PB10 pin of the chip within a safe range. Specifically, when the DC voltage VBus is greater than the power supply voltage VCC, the input voltage Vout at the PB10 pin is equal to the power supply voltage VCC; when the DC voltage VBus is less than the ground voltage GND, the input voltage Vout at the PB10 pin is equal to the ground voltage GND.

[0019] The PB9 pin of the chip 4 is set to output mode, and the conduction of the first relay K1 and the second relay K2 is controlled by the transistor Q1. When the DC voltage VBus is detected to be greater than 156V, the PB9 pin of the chip outputs a low level, the transistor Q1 is turned off, and no current flows through the coils of the first relay K1 and the second relay K2. The first relay K1 and the second relay K2 are then disconnected to protect the circuit from damage by high voltage. On the contrary, when the DC voltage VBus is detected to be less than 156V, the PB9 pin of the chip outputs a high level, the transistor Q1 is saturated, and the first relay K1 and the second relay K2 are then closed, so that the voltage doubling circuit can work normally.

[0020] The PB8 pin of the chip 4 is set to output mode, and the PB8 pin of the chip 4 is connected to the buzzer BUZ1 as an alarm circuit. When the DC voltage VBus is detected to exceed 156V, the PB8 pin of the chip 4 outputs a high level, and the buzzer BUZ1 will sound an alarm to remind the operator to pay attention to the voltage abnormality.

[0021] Compared with the related art, the present invention provides a voltage doubling circuit with a protection function, comprising a voltage doubling circuit, a relay assembly, a voltage sampling circuit, a chip, and a power supply VCC; the voltage sampling circuit comprises a resistor assembly, a clamping diode assembly, an RC low-pass filter, a ninth resistor, a transistor, and a buzzer; a first end of the resistor assembly is connected to a DC voltage VBus output end of the voltage doubling circuit; a second end of the resistor assembly is connected to the first end of the clamping diode assembly, the first end of the RC low-pass filter, and the PB10 pin of the chip; a second end of the clamping diode assembly is connected to the power supply VCC; a third end of the clamping diode assembly is connected to the second end of the RC low-pass filter; and the third end of the RC low-pass filter is grounded; a first end of the ninth resistor is connected to the PB9 pin of the chip; a second end of the ninth resistor is connected to the base of the transistor; a collector of the transistor is connected to the relay assembly for controlling the closing and opening of the relay assembly; and the emitter of the transistor is grounded; a first end of the buzzer is connected to the PB8 pin of the chip, and a second end of the buzzer is grounded. In the above structure, the voltage sampling circuit effectively controls the input voltage within a safe range, while also providing filtering, noise reduction, and voltage spike absorption, thereby improving circuit stability and safety. Furthermore, the automatic control function of the relay assembly and the buzzer alarm further enhance the circuit's self-protection capabilities and reminder functions.

[0022] It should be noted that the above-described embodiments should be understood as illustrative rather than limiting the scope of protection of the present invention, which is determined by the claims. Those skilled in the art will appreciate that non-essential improvements and adjustments to the present invention, without departing from the spirit and scope of the present invention, remain within the scope of protection of the present invention.

Claims

1. A voltage doubling circuit with a protection function, characterized in that: The voltage doubling circuit with a protection function includes a voltage doubling circuit for amplifying an input AC voltage by two times and converting it into a DC voltage VBus, a relay component connected to the voltage doubling circuit for controlling the on / off of the voltage doubling circuit, a voltage sampling circuit connected to the DC voltage VBus output end of the voltage doubling circuit, a chip connected to the voltage sampling circuit and having a data transmission interactive interface, and a power supply VCC for powering the chip, wherein the data transmission interactive interface has PB8-PB10 pins; the voltage sampling circuit includes a resistor component, a clamping diode component, an RC low-pass filter, a ninth resistor, a transistor and a buzzer, wherein the first end of the resistor component is connected to the DC voltage VBus output end of the voltage doubling circuit, and the chip has a data transmission interactive interface, and a power supply VCC for powering the chip. The second end of the resistance component is connected to the first end of the clamping diode component, the first end of the RC low-pass filter and the PB10 pin of the chip, the second end of the clamping diode component is connected to the power supply VCC, the third end of the clamping diode component is connected to the second end of the RC low-pass filter, and the third end of the RC low-pass filter is grounded; the first end of the ninth resistor is connected to the PB9 pin of the chip, the second end of the ninth resistor is connected to the base of the transistor, the collector of the transistor is connected to the relay component for controlling the closing and opening of the relay component, and the emitter of the transistor is grounded; the first end of the buzzer is connected to the PB8 pin of the chip, and the second end of the buzzer is grounded.

2. The voltage doubling circuit with a protection function according to claim 1, characterized in that: The resistor component includes a fourth resistor, a fifth resistor, a sixth resistor and a seventh resistor arranged in series; the clamping diode component includes a first clamping diode and a second clamping diode; the RC low-pass filter includes an eighth resistor and a capacitor arranged in parallel; the seventh resistor is connected to the DC voltage VBus output end of the voltage doubling circuit, the fourth resistor is simultaneously connected to the positive end of the first clamping diode, the negative end of the second clamping diode, the first end of the eighth resistor and the first end of the capacitor, the negative end of the first clamping diode is connected to the power supply, and the positive end of the second clamping diode is simultaneously connected to the second end of the eighth resistor and the second end of the capacitor and then grounded.

3. The voltage doubling circuit with a protection function according to claim 2, characterized in that: The relay assembly includes a first relay and a second relay connected to each other, and the collector of the transistor is connected to the first relay and the second relay at the same time.

Images