Capacitor-based switch control circuit
By introducing a capacitance trigger module and a timing control module into the switch control circuit, the problem of misdirection of MOS tubes and complex timing shutdown methods is solved, and the safety and intelligence of the circuit are improved.
Patent Information
- Application Number
- CN202420667389.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-04-02
AI Technical Summary
The existing switch control circuit is prone to misdirection when controlling the MOS tube to be turned on, the power supply reliability is low, and the timing shutdown method of the MOS tube is complicated and troublesome.
A capacitor-based switch control circuit is designed to delay the switch control module by using the capacitor trigger module to avoid mistriggering, and power off control is performed after the operation of the timing control module is completed, and the timing time is adjustable.
It improves the safety and intelligence of the switch control circuit, avoids the situation of false triggering, and simplifies the operation process of timed shutdown.
Smart Images
Figure CN222763782U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of switch control, in particular to a switch control circuit based on capacitance. Background Art
[0002] In power electronics technology, a switch control circuit is usually used to control the transmission state of electric energy so as to control the working state of electrical equipment. Existing switch control circuits are mostly composed of MOS tubes. The on and off of the MOS tubes are controlled by software or key switches to realize the power-on and power-off operations of the back-end electrical equipment. However, when the MOS tube is controlled to be turned on, the power-on control begins. The user may easily cause the MOS tube to be mis-conducted due to misoperation. The power supply reliability of the switch control circuit is low. In order to realize the timed shutdown of the MOS tube, the existing switch control circuit will set the software program required for timing, or manually time the power off. The control method is relatively complicated and troublesome, and therefore needs to be improved. Utility Model Content
[0003] The embodiment of the utility model provides a switch control circuit based on capacitance to solve the problems raised in the above background technology.
[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0005] A switch control circuit based on capacitance, comprising: a power control module, a capacitance trigger module, a power supply control module, a timing control module, a power-off control module, a switch control module and an output module;
[0006] A power control module, connected to the capacitor trigger module, the power-off control module and the switch control module, for receiving direct current power and transmitting the direct current power to the capacitor trigger module, the power-off control module and the switch control module through a key switch, and for filtering and voltage stabilizing the received direct current power;
[0007] A capacitor trigger module, used to store input DC electric energy and output a first control signal when the voltage of the stored electric energy exceeds a set voltage threshold;
[0008] A power supply control module, connected to the capacitor trigger module, the power supply control module and the timing control module, for receiving the first control signal and transmitting the output power processed by the power supply control module to the timing control module;
[0009] A timing control module, used for receiving the electric energy transmitted by the power supply control module and starting the timing operation, and for continuously outputting the second control signal after the timing ends;
[0010] A power-off control module, connected to the timing control module and the switch control module, for receiving a second control signal and storing input direct current power, and for providing power to the switch control module;
[0011] A switch control module, connected to the capacitor trigger module and the output module, configured to receive a first control signal and transmit the input DC power to the output module, and configured to receive power provided by the power-off control module and perform power-off control;
[0012] The output module is used to receive the electric energy output by the switch control module and connect to the electric equipment.
[0013] As a further solution of the utility model: the power control module includes a power interface, a first key switch, a second resistor, a first capacitor, a first voltage regulator and a second capacitor;
[0014] Preferably, the first end of the power interface is connected to one end of the first capacitor, the third end of the first voltage regulator and the moving end of the first push switch, the fixed end of the first push switch is connected to the capacitor trigger module and the first end of the second resistor, the second end of the second resistor is connected to the power-off control module and the switch control module, the second end of the power interface is connected to the other end of the first capacitor, the first end of the first voltage regulator, one end of the second capacitor and the ground, and the other end of the second capacitor is connected to the second end of the first voltage regulator and the power supply control module.
[0015] As a further solution of the utility model: the capacitor trigger module includes a third resistor, a fourth resistor, a third capacitor and a first diode;
[0016] Preferably, one end of the third resistor is connected to the first end of the second resistor, the other end of the third resistor is connected to one end of the fourth resistor, one end of the third capacitor and the cathode of the first diode, the anode of the first diode is connected to the switch control module and the power supply control module, and the other end of the fourth capacitor and the other end of the third capacitor are both grounded.
[0017] As a further solution of the utility model: the power-off control module includes a third power tube, a fourth capacitor and a fifth resistor;
[0018] Preferably, the drain of the third power tube is connected to the second end of the second resistor, the source of the third power tube is connected to one end of the fourth capacitor and one end of the fifth resistor, the other end of the fourth resistor and the other end of the fifth resistor are connected, and the gate of the third power tube is connected to the timing control module.
[0019] As a further solution of the utility model: the switch control module includes a sixth resistor, a second power tube, a first switch tube and a seventh resistor; the output module includes a fifth capacitor and an output port;
[0020] Preferably, the source of the second power tube is connected to the second end of the second resistor and is connected to the gate of the second power tube and the collector of the first switching tube through the sixth resistor, the emitter of the first switching tube is grounded through the seventh resistor, the base of the first switching tube is connected to the anode of the first diode, the drain of the second power tube is connected to one end of the fifth capacitor and the first end of the output port, and the other end of the fifth capacitor and the second end of the output port are both grounded.
[0021] As a further solution of the utility model: the power supply control module includes a first power tube, a first resistor and a second switch tube;
[0022] Preferably, the source of the first power tube is connected to the second end of the first regulator and is connected to the gate of the first power tube and the collector of the second switch tube through the first resistor, the emitter of the second switch tube is grounded, the base of the second switch tube is connected to the anode of the first diode, and the drain of the first power tube is connected to the timing control module.
[0023] As a further solution of the utility model: the timing control module includes a sixth capacitor, a first potentiometer, a second diode, a seventh capacitor and a first timer;
[0024] Preferably, one end of the sixth capacitor is connected to the drain of the first power tube, the fourth end and the eighth end of the first timer, the other end of the sixth capacitor is connected to the cathode of the second diode, one end of the first potentiometer, the second end and the sixth end of the first timer, the fifth end of the first timer is grounded through the seventh capacitor, the anode of the second diode, the first end of the first timer, the other end of the first potentiometer and the slider end are all grounded, and the third end of the first timer is connected to the gate of the third power tube.
[0025] Compared with the prior art, the beneficial effect of the utility model is as follows: when the power control module of the capacitor-based switch control circuit of the utility model supplies power, the capacitor trigger module delays the triggering of the switch control module to transmit electric energy, so as to power the output module, avoid false triggering, and improve the safety of the switch control circuit. At the same time, the capacitor trigger module will also trigger the timing control module to perform timing work, and after the timing work is completed, the power-off control module is controlled to power off the switch control module. The timing duration is adjustable and the timing range is increased, thereby improving the intelligence of the switch control circuit. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0027] Figure 1 A schematic block diagram of a capacitor-based switch control circuit provided in an example of the utility model.
[0028] Figure 2 A circuit diagram of a capacitor-based switch control circuit provided in an example of the utility model.
[0029] Figure 3 This is a connection circuit diagram of a timing control module provided by an example of the utility model. DETAILED DESCRIPTION
[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0031] In one embodiment, see Figure 1 , a switch control circuit based on capacitance, comprising: a power control module 1, a capacitance trigger module 2, a power supply control module 3, a timing control module 4, a power-off control module 5, a switch control module 6 and an output module 7;
[0032] Specifically, the power control module 1 is connected to the capacitor trigger module 2, the power-off control module 5 and the switch control module 6, and is used to access the DC power and transmit the DC power to the capacitor trigger module 2, the power-off control module 5 and the switch control module 6 through the key switch, and is used to filter and regulate the DC power;
[0033] The capacitor trigger module 2 is used to store the input DC electric energy and output a first control signal when the voltage of the stored electric energy exceeds a set voltage threshold;
[0034] The power supply control module 3 is connected to the capacitor trigger module 2, the power supply control module 1 and the timing control module 4, and is used to receive the first control signal and transmit the output power processed by the power supply control module 1 to the timing control module 4;
[0035] The timing control module 4 is used to receive the electric energy transmitted by the power supply control module 3 and start the timing operation, and is used to continuously output the second control signal after the timing ends;
[0036] A power-off control module 5, connected to the timing control module 4 and the switch control module 6, for receiving a second control signal and storing input DC power, and for providing power to the switch control module 6;
[0037] The switch control module 6 is connected to the capacitor trigger module 2 and the output module 7, and is used to receive the first control signal and transmit the input DC power to the output module 7, and is used to receive the power provided by the power-off control module 5 and perform power-off control;
[0038] The output module 7 is used to receive the electric energy output by the switch control module 6 and connect to the electric device.
[0039] In a specific embodiment, the power control module 1 can adopt a power control circuit composed of a key switch, a capacitor, a power interface, a voltage stabilizer, etc., which can be connected to DC power, control the transmission of power and perform voltage stabilization and filtering processing; the capacitor trigger module 2 can adopt a capacitor trigger circuit composed of a capacitor, a diode, and a resistor, and the capacitor and the resistor store and discharge energy and control the power-on operation of the switch control module 6 when the stored energy reaches the voltage threshold set by the diode, that is, the breakdown voltage; the power supply control module 3 can adopt a power supply control circuit composed of a power tube, a resistor and a triode to control the power supply for the timing control module 4; the timing The control module 4 can adopt a timing control circuit composed of NE555 integrated chip, etc., and start the timing work when the power is turned on, and continue to output a high-level signal after the timing ends; the above-mentioned power-off control module 5 can adopt a power-off control circuit composed of a power tube, a capacitor and a resistor, which can store energy and control the power-off work of the switch control circuit when the stored energy reaches a certain value; the above-mentioned switch control module 6 can adopt a switch control circuit composed of a power tube, a triode and a resistor to control the transmission state of electric energy; the above-mentioned output module 7 can adopt an output circuit composed of an output port and a capacitor, which is connected to the electrical equipment and supplies power to the electrical equipment.
[0040] In another embodiment, see Figure 1 , Figure 2 and Figure 3 , the power control module 1 includes a power interface, a first key switch S1, a second resistor R2, a first capacitor C1, a first voltage regulator IC1 and a second capacitor C2;
[0041] Specifically, the first end of the power interface is connected to one end of the first capacitor C1, the third end of the first voltage regulator IC1 and the moving end of the first push switch S1, the fixed end of the first push switch S1 is connected to the capacitor trigger module 2 and the first end of the second resistor R2, the second end of the second resistor R2 is connected to the power-off control module 5 and the switch control module 6, the second end of the power interface is connected to the other end of the first capacitor C1, the first end of the first voltage regulator IC1, one end of the second capacitor C2 and the ground end, and the other end of the second capacitor C2 is connected to the second end of the first voltage regulator IC1 and the power supply control module 3.
[0042] In a specific embodiment, the first voltage regulator IC1 may be a LM317 voltage regulator.
[0043] Further, the capacitor trigger module 2 includes a third resistor R3, a fourth resistor R4, a third capacitor C3 and a first diode D1;
[0044] Specifically, one end of the third resistor R3 is connected to the first end of the second resistor R2, the other end of the third resistor R3 is connected to one end of the fourth resistor R4, one end of the third capacitor C3 and the cathode of the first diode D1, the anode of the first diode D1 is connected to the switch control module 6 and the power supply control module 3, and the other end of the fourth capacitor C4 and the other end of the third capacitor C3 are both grounded.
[0045] In a specific embodiment, the third resistor R3 and the fourth resistor R4 divide the voltage, and the third capacitor C3 stores the electric energy; the first diode D1 sets the voltage threshold.
[0046] Furthermore, the power-off control module 5 includes a third power tube Q3, a fourth capacitor C4 and a fifth resistor R5;
[0047] Specifically, the drain of the third power tube Q3 is connected to the second end of the second resistor R2, the source of the third power tube Q3 is connected to one end of the fourth capacitor C4 and one end of the fifth resistor R5, the other end of the fourth resistor R4 and the other end of the fifth resistor R5 are connected, and the gate of the third power tube Q3 is connected to the timing control module 4.
[0048] In a specific embodiment, the third power tube Q3 can be an N-channel field effect tube; the fourth capacitor C4 is used for storing electric energy.
[0049] Further, the switch control module 6 includes a sixth resistor R6, a second power tube Q2, a first switch tube VT1 and a seventh resistor R7; the output module 7 includes a fifth capacitor C5 and an output port;
[0050] Specifically, the source of the second power tube Q2 is connected to the second end of the second resistor R2 and is connected to the gate of the second power tube Q2 and the collector of the first switch tube VT1 through the sixth resistor R6, the emitter of the first switch tube VT1 is grounded through the seventh resistor R7, the base of the first switch tube VT1 is connected to the anode of the first diode D1, the drain of the second power tube Q2 is connected to one end of the fifth capacitor C5 and the first end of the output port, and the other end of the fifth capacitor C5 and the second end of the output port are both grounded.
[0051] In a specific embodiment, the sixth power tube may be a P-channel field effect tube, which is triggered to be cut off by the electric energy transmitted by the sixth resistor R6; the first switch tube VT1 may be an NPN transistor.
[0052] Furthermore, the power supply control module 3 includes a first power tube Q1, a first resistor R1 and a second switch tube VT2;
[0053] Specifically, the source of the first power tube Q1 is connected to the second end of the first regulator IC1 and is connected to the gate of the first power tube Q1 and the collector of the second switch tube VT2 through the first resistor R1, the emitter of the second switch tube VT2 is grounded, the base of the second switch tube VT2 is connected to the anode of the first diode D1, and the drain of the first power tube Q1 is connected to the timing control module 4.
[0054] In a specific embodiment, the first power tube Q1 can be a P-channel field effect tube, which is triggered to be cut off by the first resistor R1; the second switch tube VT2 can be an NPN transistor.
[0055] Further, the timing control module 4 includes a sixth capacitor C6, a first potentiometer RP1, a second diode D2, a seventh capacitor C7 and a first timer IC2;
[0056] Specifically, one end of the sixth capacitor C6 is connected to the drain of the first power tube Q1, the fourth end and the eighth end of the first timer IC2, the other end of the sixth capacitor C6 is connected to the cathode of the second diode D2, one end of the first potentiometer RP1, the second end and the sixth end of the first timer IC2, the fifth end of the first timer IC2 is grounded through the seventh capacitor C7, the anode of the second diode D2, the first end of the first timer IC2, the other end of the first potentiometer RP1 and the slider end are all grounded, and the third end of the first timer IC2 is connected to the gate of the third power tube Q3.
[0057] In a specific embodiment, the first timer IC2 can use NE555 integrated chip, cooperate with the sixth capacitor C6, the second diode D2, the first potentiometer RP1 and the seventh resistor R7, start timing work when powered on, and after the timing ends, as long as it is powered on, it can continuously output a high-level signal, wherein the resistance value of the first potentiometer RP1 can adjust the timing duration.
[0058] In a capacitor-based switch control circuit of the present embodiment, direct current power is connected by a power interface, and a first voltage stabilizer IC1, a first capacitor C1, and a second capacitor C2 perform voltage stabilization and filtering processing. When the first key switch S1 is pressed, a third resistor R3 and a fourth resistor R4 perform voltage division processing, and the third capacitor C3 stores energy. If the first key switch S1 is triggered by mistake, the first key switch S1 can be disconnected in time when the power stored in the third capacitor C3 does not break through the first diode D1. When the power stored in the third capacitor C3 breaks through the first diode D1, the first switch tube VT1 and the second switch tube VT2 are both turned on, and at the same time, the second power tube Q2 and the first power tube Q1 are both turned on. At this time The second power tube Q2 transmits the input electric energy to the electric device connected to the output port, and the first power tube Q1 transmits the electric energy to the first timer IC2. The first timer IC2 cooperates with the sixth capacitor C6, the seventh capacitor C7, the second diode D2 and the first potentiometer RP1 to perform timing work, and after the timing ends, it continuously outputs a high-level signal and triggers the third power tube Q3 to turn on. At this time, the fourth capacitor C4 stores energy and cooperates with the fifth resistor R5 to further perform timing work, and provides the timing duration with a simple control method. When the amount of electricity stored in the fourth capacitor C4 reaches a certain value, the second power tube Q2 will be triggered to be cut off through the sixth resistor R6, and then the power-off control will be automatically performed.
[0059] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
[0060] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A capacitor-based switch control circuit, characterized in that: The capacitor-based switch control circuit includes: a power supply control module, a capacitor trigger module, a power supply control module, a timing control module, a power-off control module, a switch control module and an output module; The power control module is connected to the capacitor trigger module, the power-off control module and the switch control module, and is used to receive direct current power and transmit the direct current power to the capacitor trigger module, the power-off control module and the switch control module through a key switch, and is used to filter and regulate the received direct current power; The capacitor trigger module is used to store the input DC electric energy and output a first control signal when the voltage of the stored electric energy exceeds a set voltage threshold; The power supply control module is connected to the capacitor trigger module, the power supply control module and the timing control module, and is used to receive the first control signal and transmit the output power processed by the power supply control module to the timing control module; The timing control module is used to receive the electric energy transmitted by the power supply control module and start the timing operation, and is used to continuously output the second control signal after the timing ends; The power-off control module is connected to the timing control module and the switch control module, and is used to receive the second control signal and store the input DC power to provide power to the switch control module; The switch control module is connected to the capacitor trigger module and the output module, and is used to receive the first control signal and transmit the input DC power to the output module, and is used to receive the power provided by the power-off control module and perform power-off control; The output module is used to receive the electric energy output by the switch control module and connect to the electric device.
2. A capacitor-based switch control circuit according to claim 1, characterized in that: The power control module includes a power interface, a first key switch, a second resistor, a first capacitor, a first voltage stabilizer and a second capacitor; The first end of the power interface is connected to one end of the first capacitor, the third end of the first voltage regulator and the moving end of the first push switch, the fixed end of the first push switch is connected to the capacitor trigger module and the first end of the second resistor, the second end of the second resistor is connected to the power-off control module and the switch control module, the second end of the power interface is connected to the other end of the first capacitor, the first end of the first voltage regulator, one end of the second capacitor and the ground, and the other end of the second capacitor is connected to the second end of the first voltage regulator and the power supply control module.
3. A capacitor-based switch control circuit according to claim 2, characterized in that: The capacitor trigger module includes a third resistor, a fourth resistor, a third capacitor and a first diode; One end of the third resistor is connected to the first end of the second resistor, the other end of the third resistor is connected to one end of the fourth resistor, one end of the third capacitor and the cathode of the first diode, the anode of the first diode is connected to the switch control module and the power supply control module, and the other end of the fourth capacitor and the other end of the third capacitor are both grounded.
4. A capacitor-based switch control circuit according to claim 3, characterized in that: The power-off control module includes a third power tube, a fourth capacitor and a fifth resistor; The drain of the third power tube is connected to the second end of the second resistor, the source of the third power tube is connected to one end of the fourth capacitor and one end of the fifth resistor, the other end of the fourth resistor and the other end of the fifth resistor are connected, and the gate of the third power tube is connected to the timing control module.
5. A capacitor-based switch control circuit according to claim 4, characterized in that: The switch control module includes a sixth resistor, a second power tube, a first switch tube and a seventh resistor; the output module includes a fifth capacitor and an output port; The source of the second power tube is connected to the second end of the second resistor and is connected to the gate of the second power tube and the collector of the first switch tube through the sixth resistor. The emitter of the first switch tube is grounded through the seventh resistor. The base of the first switch tube is connected to the anode of the first diode. The drain of the second power tube is connected to one end of the fifth capacitor and the first end of the output port. The other end of the fifth capacitor and the second end of the output port are both grounded.
6. The capacitor-based switch control circuit according to claim 5, characterized in that: The power supply control module includes a first power tube, a first resistor and a second switch tube; The source of the first power tube is connected to the second end of the first regulator and is connected to the gate of the first power tube and the collector of the second switch tube through the first resistor. The emitter of the second switch tube is grounded, the base of the second switch tube is connected to the anode of the first diode, and the drain of the first power tube is connected to the timing control module.
7. The capacitor-based switch control circuit according to claim 6, characterized in that: The timing control module includes a sixth capacitor, a first potentiometer, a second diode, a seventh capacitor and a first timer; One end of the sixth capacitor is connected to the drain of the first power tube, the fourth end and the eighth end of the first timer, the other end of the sixth capacitor is connected to the cathode of the second diode, one end of the first potentiometer, the second end and the sixth end of the first timer, the fifth end of the first timer is grounded through the seventh capacitor, the anode of the second diode, the first end of the first timer, the other end of the first potentiometer and the slider end are all grounded, and the third end of the first timer is connected to the gate of the third power tube.