Circuit module for eliminating peak waves of power supply machinery

Abstract

The utility model provides a circuit module for eliminating peak waves of a power supply machine, which comprises a first-order filter circuit, a second-order filter circuit and a third-order filter circuit, the first-order filter circuit comprises a transmitting end of an optocoupler Q1 connected to the input end of the power supply; the second-order filter circuit comprises a capacitor C1, a resistor R6, a triode Q2 and an MOS tube Q3, the receiving end of the optocoupler Q1 is connected with the capacitor C1, the resistor R6 is connected with the base electrode of the triode Q2, the collector electrode of the triode Q2 is connected with the G electrode of the MOS tube Q3, and the input end of the power supply is connected with the S electrode of the MOS tube Q3; the D pole of the MOS tube Q3 is connected with the output end of the power supply; and the third-order filter circuit comprises a diode D2 connected in parallel with the output end of the power supply. Firstly, a first-order filter circuit is used for first-time waveform filtering, and mechanical peak waves generated at the moment of on-off of a key or a toggle switch are eliminated; the second-order filter circuit realizes the functions of secondary filtering and soft start; and then the peak waves are absorbed and filtered for the third time through the third-order filter circuit.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply filtering, in particular to a circuit module for eliminating mechanical peak waves of a power supply. Background Art

[0002] In the current intelligent manufacturing environment, when providing working power voltage to products or equipment, direct plug-in terminals, mechanical buttons or pull switches, relay switches and other mechanical switches are often used to switch the power supply, but the purity of the power supply is not taken into consideration. As long as the power supply is complete, the spikes and noise generated in the power supply mode are not considered, and such operation methods directly cause hard and soft damage to the product. The current power supply method has the following defects, for example: 1. Power spikes will be generated when powering the equipment product directly through buttons or pull switches. 2. Power spikes will be generated when powering the equipment product through electronic mechanical switches such as relays. 3. Power spikes will also be generated when powering the equipment product through the capacitors in electronic switch tubes such as MOS tubes. As shown in the attached Figure 1 and attached Figure 2 As shown in the figure, under the condition of 5V power supply, the spike wave generated by mechanical jitter is greater than 10V, which causes internal damage to the hardware and software during the power supply process of products and equipment, with immeasurable consequences. Utility Model Content

[0003] In order to solve the above problems, the purpose of the present invention is to provide a circuit module for eliminating mechanical spike waves of a power supply.

[0004] The utility model is implemented by the following method: a circuit module for eliminating mechanical spike waves of a power supply, comprising a first-order filtering circuit, a second-order filtering circuit, and a third-order filtering circuit; the first-order filtering circuit comprises a transmitting end of an optocoupler Q1 connected to the input end of the power supply; the second-order filtering circuit comprises a capacitor C1, a resistor R6, a transistor Q2, and a MOS transistor Q3; the receiving end of the optocoupler Q1 is connected to the capacitor C1, the resistor R6, and the base of the transistor Q2; the collector of the transistor Q2 is connected to the G electrode of the MOS transistor Q3; the input end of the power supply is connected to the S electrode of the MOS transistor Q3; the D electrode of the MOS transistor Q3 is connected to the output end of the power supply; the third-order filtering circuit comprises a diode D2 connected in parallel to the output end of the power supply.

[0005] Preferably, the first-order filter circuit also includes a resistor R3, one end of the resistor R3 is connected to the input end of the power supply, the other end of the resistor R3 is connected to the positive electrode of the input end of the optocoupler Q1, the fourth pin of the receiving end of the optocoupler Q1 is connected to the input end of the power supply, and the third pin of the optocoupler Q1 is connected to the capacitor C1 and the base of the transistor Q2.

[0006] Preferably, a travel switch J1 is further included, and the travel switch J1 is connected in series between the resistor R3 and the input end of the power supply.

[0007] Preferably, a circuit breaker F1 is further included, one end of the circuit breaker F1 is connected to the input end of the power supply, and the other end of the circuit breaker F1 is connected to the fourth pin of the receiving end of the optocoupler Q1 and the S pole of the MOS tube Q3.

[0008] Preferably, the second-order filter circuit further includes a resistor R1, one end of which is connected to the input end of the power supply, and the other end of which is connected to the G pole of the MOS tube Q3; and further includes a diode D1 connected in parallel with the resistor R1, the cathode of the diode D1 is connected to the input end of the power supply, and the anode of the diode D1 is connected to the G pole of the MOS tube Q3.

[0009] Preferably, one end of the resistor R6 is connected to the third pin of the receiving end of the optocoupler Q1 , and the other end of the resistor R6 is grounded.

[0010] Preferably, the second-order filter circuit further includes a resistor R4, and the resistor R4 is connected in series between the collector of the transistor Q2 and the G electrode of the MOS transistor Q3.

[0011] Preferably, it also includes a connector J2 and a connector J3, the connector J3 is used to connect the power supply, the positive pole of the connector J3 is connected to the input end of the power supply, and the negative pole of the connector J3 is grounded; the negative pole of the optocoupler Q1 is grounded, the other end of the capacitor C1 is grounded, and the emitter of the transistor Q2 is grounded; the connector J2 is connected in parallel with the diode D2, and the connector J2 is connected to the inductive load.

[0012] Preferably, the third-order filtering circuit further includes a resistor R5, which is connected in parallel with the diode D2; the cathode of the diode D2 is connected to the D pole of the MOS tube Q3, and the anode of the diode D2 is grounded.

[0013] The beneficial effects of the present invention are as follows: the present invention provides a circuit module for eliminating mechanical spikes in a power supply. Compared to the prior art, the present invention has at least the following technical effects: 1. The first waveform filtering is performed by utilizing the delay of the optocoupler Q1 in the first-order filtering circuit, eliminating the mechanical spikes generated by the on / off moment of a key or toggle switch. After the first-order filtering circuit, the circuit is filtered by the RC and MOS transistors in the second-order filtering circuit to achieve secondary filtering and soft-start functions. A third-order filtering circuit then connects a fast Schottky diode to the voltage output to absorb and filter the spikes for a third time. This three-stage filtering effectively absorbs mechanical spikes and protects both hardware and software. 2. A resistor R3 is connected in series between the power supply input and the optocoupler Q1 to limit current and provide reliable conduction current for the optocoupler Q1. 3. The introduction of diode D1 and resistor R1 allows compatibility with different voltages at the power supply input, making the present device more applicable. 4. When connector J2 is connected to an inductive load, resistor R5 and diode D2 are mainly used to absorb and release reverse electromotive force, thereby protecting MOS tube Q3 and power supply VCCIN terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a waveform diagram of a circuit module that does not use the power supply mechanical spike wave elimination method. When the circuit module is powered by 5V, the spike wave >10V is generated by mechanical jitter. Figure 1 .

[0015] Figure 2 This is a waveform diagram of a spike wave >10V generated by mechanical jitter when the circuit module without eliminating mechanical spike waves of the power supply is powered by 5V. Figure 2 .

[0016] Figure 3 This is a block diagram of the filtering principle of a circuit module for eliminating mechanical spike waves of a power supply according to the present invention.

[0017] Figure 4 This is a circuit principle diagram of a circuit module for eliminating mechanical spike waves of a power supply according to the present invention.

[0018] Figure 5 This is a waveform diagram after filtering using the circuit module of the utility model for eliminating mechanical spike waves of the power supply.

[0019] Explanation of the accompanying figures: 1. First-order filter circuit; 2. Second-order filter circuit; 3. Third-order filter circuit. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] See also Figures 3 to 5 A circuit module for eliminating mechanical spikes in a power supply includes a first-order filter circuit 1, a second-order filter circuit 2, and a third-order filter circuit 3. The first-order filter circuit 1 includes a transmitter end of an optocoupler Q1 connected to the input end of a power supply. The second-order filter circuit 2 includes a capacitor C1, a resistor R6, a transistor Q2, and a MOS transistor Q3. The receiving end of the optocoupler Q1 is connected to the capacitor C1, the resistor R6, and the base of the transistor Q2. The collector of the transistor Q2 is connected to the G electrode of the MOS transistor Q3. The input end of the power supply is connected to the S electrode of the MOS transistor Q3. The D electrode of the MOS transistor Q3 is connected to the output end of the power supply. The third-order filter circuit 3 includes a diode D2 connected in parallel to the output end of the power supply. First, the delay of the optocoupler Q1 of the first-order filter circuit 1 is used to generate the first waveform filtering to eliminate the mechanical spike waves generated by the button or toggle switch at the moment of on and off; after the first filtering is performed after the first-order filter circuit 1, the RC and MOS tubes of the second-order filter circuit 2 are used to realize the functions of secondary filtering and soft start; then, the diode is connected to the voltage output end of the third-order filter circuit 3 to absorb and filter the spike waves for the third time; through the three-stage filtering, the mechanical spike waves can be well absorbed. The preferred diode D2 is a fast Schottky diode. One end of the resistor R6 is connected to the third pin of the receiving end of the optocoupler Q1, and the other end of the resistor R6 is grounded.

[0022] See also Figure 4 Preferably, the first-order filter circuit 1 further includes a resistor R3, one end of which is connected to the input of the power supply, the other end of which is connected to the positive electrode of the input of the optocoupler Q1, the fourth pin of the receiving end of the optocoupler Q1 is connected to the input of the power supply, and the third pin of the optocoupler Q1 is connected to the capacitor C1 and the base of the transistor Q2. The resistor R3 is connected in series between the input of the power supply and the optocoupler Q1 to limit the current and provide a reliable conduction current for the optocoupler Q1.

[0023] See also Figure 4 Preferably, the circuit breaker further comprises a limit switch J1, which is connected in series between the resistor R3 and the input terminal of the power supply, and is used to control the power supply to the optocoupler Q1.

[0024] See also Figure 4 Preferably, it further includes a circuit breaker F1, one end of which is connected to the input end of the power supply, and the other end of which is connected to the fourth pin of the receiving end of the optocoupler Q1 and the S pole of the MOS tube Q3. The circuit breaker F1 plays a protective role.

[0025] See also Figure 4Preferably, the second-order filter circuit 2 further includes a resistor R1, one end of which is connected to the power input terminal and the other end of which is connected to the G terminal of the MOS transistor Q3; and a diode D1 connected in parallel with the resistor R1, with the cathode of the diode D1 connected to the power input terminal and the anode of the diode D1 connected to the G terminal of the MOS transistor Q3. The introduction of diode D1 and resistor R1 enables compatibility with different voltages inputted to the power input terminal (VCCIN), thus extending the applicability of the device to a wider range of applications.

[0026] See also Figure 4 Preferably, the second-order filter circuit 2 further includes a resistor R4, and the resistor R4 is connected in series between the collector of the transistor Q2 and the G pole of the MOS tube Q3.

[0027] See also Figure 4 Preferably, it further includes a connector J2 and a connector J3. The connector J3 is used to connect to the power supply. The positive pole of the connector J3 is connected to the input terminal of the power supply, and the negative pole of the connector J3 is grounded. The negative pole of the optocoupler Q1 is grounded, the other end of the capacitor C1 is grounded, and the emitter of the transistor Q2 is grounded. The connector J2 is connected in parallel with the diode D2, and the connector J2 is connected to an inductive load. The third-order filter circuit 3 also includes a resistor R5, which is connected in parallel with the diode D2. The negative pole of the diode D2 is connected to the D pole of the MOS tube Q3, and the positive pole of the diode D2 is grounded. When the connector J2 is connected to an inductive load, the resistor R5 and the diode D2 are mainly used to absorb and release the reverse electromotive force, thereby protecting the MOS tube Q3 and the power supply VCCIN terminal.

[0028] The utility model has the following working principle:

[0029] Connect the power supply to connector J3, close the limit switch J1, and the VCCIN power supply flows through resistor R3, limiting the current to provide reliable conduction current to the optocoupler Q1. Optocoupler Q1 turns on, and the current charges capacitor C1. As capacitor C1 charges, the base voltage of Q2 slowly rises with the charging time. Transistor Q2 saturates and turns on. The voltage at the G terminal of MOS transistor Q3 also rises and slowly turns on. The VCCIN power supply is supplied to the VCCOUT terminal through fuse F1 and MOS transistor Q3, thereby mitigating the first half of the spike wave at the power-up of the power supply input VCCIN, which will be cleanly filtered out. When the limit switch J1 is opened, the optocoupler Q1 has no current flowing through it and is turned off. Capacitor C1 discharges through resistor R6 and transistor Q2, and the base voltage of transistor Q2 slowly decreases and turns off. The output terminal VCCOUT of the power supply also slowly turns off, acting as a soft shutdown, reducing the spike wave caused by the release voltage of VCCIN. When connector J2 is connected to an inductive load, resistor R5 and diode D2 are primarily used to absorb and release reverse electromotive force, thereby protecting MOS transistor Q3 and the power supply VCCIN. Diode D1 and resistor R1 are primarily used to accommodate different VCCIN input voltages.

[0030] Several points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which can be mechanical connection or electrical connection, or internal communication between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may change.

[0031] Secondly: The drawings of the disclosed embodiments of the present invention only involve structures related to the disclosed embodiments. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0032] Finally, the above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention fall within the protection scope of the present invention.

[0033] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications without departing from the principle of the present invention should also be regarded as within the scope of protection of the present invention.

Claims

1. A circuit module for eliminating mechanical spikes in a power supply, characterized by: The invention comprises a first-order filter circuit, a second-order filter circuit, and a third-order filter circuit; the first-order filter circuit comprises a transmitting end of an optocoupler Q1 connected to the input end of a power supply; the second-order filter circuit comprises a capacitor C1, a resistor R6, a transistor Q2, and a MOS transistor Q3; the receiving end of the optocoupler Q1 is connected to the capacitor C1, the resistor R6, and the base of the transistor Q2; the collector of the transistor Q2 is connected to the G electrode of the MOS transistor Q3; the input end of the power supply is connected to the S electrode of the MOS transistor Q3; the D electrode of the MOS transistor Q3 is connected to the output end of the power supply; the third-order filter circuit comprises a diode D2 connected in parallel to the output end of the power supply.

2. The circuit module for eliminating mechanical spikes in a power supply according to claim 1, characterized in that: The first-order filter circuit also includes a resistor R3, one end of the resistor R3 is connected to the input end of the power supply, the other end of the resistor R3 is connected to the positive electrode of the input end of the optocoupler Q1, the fourth pin of the receiving end of the optocoupler Q1 is connected to the input end of the power supply, and the third pin of the optocoupler Q1 is connected to the capacitor C1 and the base of the transistor Q2.

3. The circuit module for eliminating mechanical spikes in a power supply according to claim 2, characterized in that: The device further comprises a travel switch J1, which is connected in series between the resistor R3 and the input end of the power supply.

4. The circuit module for eliminating mechanical spikes in a power supply according to claim 1, characterized in that: It also includes a circuit breaker F1, one end of which is connected to the input end of the power supply, and the other end of which is connected to the fourth pin of the receiving end of the optocoupler Q1 and the S pole of the MOS tube Q3.

5. The circuit module for eliminating mechanical spikes in a power supply according to claim 1, characterized in that: The second-order filter circuit further includes a resistor R1, one end of which is connected to the input end of the power supply, and the other end of which is connected to the G terminal of the MOS transistor Q3; and a diode D1 connected in parallel with the resistor R1, the cathode of the diode D1 is connected to the input end of the power supply, and the anode of the diode D1 is connected to the G terminal of the MOS transistor Q3.

6. The circuit module for eliminating mechanical spikes in a power supply according to claim 5, characterized in that: One end of the resistor R6 is connected to the third pin of the receiving end of the optocoupler Q1 , and the other end of the resistor R6 is grounded.

7. The circuit module for eliminating mechanical spikes in a power supply according to claim 5, characterized in that: The second-order filter circuit further includes a resistor R4, which is connected in series between the collector of the transistor Q2 and the G electrode of the MOS transistor Q3.

8. The circuit module for eliminating mechanical spikes in a power supply according to claim 1, characterized in that: It also includes a connector J2 and a connector J3, wherein the connector J3 is used to connect to a power supply, the positive electrode of the connector J3 is connected to the input end of the power supply, and the negative electrode of the connector J3 is grounded; the negative electrode of the optocoupler Q1 is grounded, the other end of the capacitor C1 is grounded, and the emitter of the transistor Q2 is grounded; the connector J2 is connected in parallel with the diode D2, and the connector J2 is connected to an inductive load.

9. The circuit module for eliminating mechanical spikes in a power supply according to claim 8, characterized in that: The third-order filter circuit further includes a resistor R5, which is connected in parallel with the diode D2; the cathode of the diode D2 is connected to the D terminal of the MOS transistor Q3, and the anode of the diode D2 is grounded.

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