CN117239673B - Hiccup type protection circuit equipment and method - Google Patents
Hiccup type protection circuit equipment and method Download PDFInfo
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- CN117239673B CN117239673B CN202311499139.0A CN202311499139A CN117239673B CN 117239673 B CN117239673 B CN 117239673B CN 202311499139 A CN202311499139 A CN 202311499139A CN 117239673 B CN117239673 B CN 117239673B
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Abstract
The invention relates to the technical field of circuit hiccup protection, and provides a hiccup type protection circuit device and a method, wherein the protection circuit device comprises a main loop with a current sampling resistor for protection and a protection switch; the main loop is electrically connected with a protection circuit comprising a diode, a transistor switch and a capacitor, and the protection circuit is used for overcurrent or overvoltage protection of the main loop. The invention is composed of simple devices such as resistor, capacitor, diode, transistor, MOS tube, etc., the circuit is simple, and the cost is low; the applicability is wide by adjusting the withstand voltage parameter of the device; the protection current can be configured through the resistance value of the protection current sampling resistor R3; the protection retry interval time can be adjusted through protection parameters such as resistance five R6 and resistance capacitance of a capacitor C1, so that the flexibility is good; the protection response sensitivity is high, the action time is fixed, and the influence from the environment is small; the power consumption and the service life of the whole machine are not obviously affected; after the fault is removed, the output is automatically recovered, and the protection effect is good.
Description
Technical Field
The invention belongs to the technical field of circuit hiccup protection, and particularly relates to a hiccup type protection circuit device and a hiccup type protection method.
Background
When the circuit outputs a high-side signal to the outside (other boards or external devices), the external load end has uncertainty. If the external load has overcurrent or short-circuit faults, and the output circuit is not protected or is not perfectly protected, the output circuit can be directly damaged; or in an abnormal state of continuous heating for a long time, and the service life of the device is reduced.
In order to solve the above problems, an overcurrent or short-circuit protection form is often used, which is an overcurrent protection device such as a fuse, and the main drawbacks are: firstly, the protection current cannot be accurately set, secondly, under the protection state, the fuse is in a continuously heating state, and long-time external overcurrent or short-circuit faults can influence the service life of the load device.
While the disadvantage of the protection form of fuses is that hiccup mode is proposed, which is another form of overcurrent or short-circuit protection, suitable for certain power supplies and LED drivers. An advantage of hiccup mode or hiccup protection is that when an output overcurrent or short is detected, the driver/power supply will enter the "hiccup mode" and will remain in that mode to protect the power supply until the fault is cleared. After the fault is removed, the power supply can resume normal operation without circularly supplying power like a plurality of self-locking protection circuits.
In the hiccup mode, the application is very popular, namely, the port protection chip is used as described in the patent number of 202120461631.9 and the patent name of "an overcurrent and overvoltage hiccup type protection circuit", and the main disadvantages are that: the cost is high, the parameters such as the working voltage level, the recovery time and the like are generally fixed values and cannot be configured, and the protection parameters cannot be customized and the flexibility is limited.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides hiccup type protection circuit equipment and a hiccup type protection method, which are composed of simple devices such as resistors, capacitors, diodes, transistors, MOS (metal oxide semiconductor) tubes and the like, and have the advantages of simple circuit and low cost; the invention can be suitable for voltage occasions of 3.3V, 5V, 12V, 24V and higher by adjusting the withstand voltage parameters of the device, and has wide applicability; the protection current can be used for configuring the protection retry interval time through the resistance value of the current sampling resistor R3 for protection, can be regulated through the protection parameters such as the resistance value of the resistor five R6 and the resistance value of the capacitor C1, and has wide application range and good flexibility; the invention has high protection response sensitivity, fixed action time and small influence by environment; during the protection period, the invention outputs in an intermittent mode, the device can not continuously generate heat, and the power consumption and the service life of the whole machine can not be obviously influenced; and after the fault is removed, the output is automatically recovered, and the protection effect is good.
The invention adopts the following technical scheme.
A hiccup type protection circuit device, comprising:
the main loop is provided with a current sampling resistor for protection and a protection switch;
the main loop is electrically connected with a protection circuit comprising a diode, a transistor switch and a capacitor, and the protection circuit is used for overcurrent or overvoltage protection of the main loop.
Preferably, the main loop comprises a voltage source VS1, a current sampling resistor R3 for protection, a protection switch T1 and a load RL which are connected in series in sequence;
the voltage source VS1 is used for generating a level signal input into the main loop, the voltage source VS1 is electrically connected with one end of the protection current sampling resistor R3, the protection current sampling resistor R3 is electrically connected with the source electrode of the protection switch T1, the drain electrode of the protection switch T1 is electrically connected with the load RL, and an electric signal output from the drain electrode of the protection switch T1 to the load RL is a high-side signal output externally.
Preferably, the protection circuit includes a transistor switch T2, a capacitor C1 and a diode SD3;
the voltage source VS1 is electrically connected to the emitter of the transistor switch T2, the base of the transistor switch T2 is electrically connected to the left side of the capacitor C1, the collector of the transistor switch T2 is electrically connected to the gate of the protection switch T1, the right side of the capacitor C1, the drain of the protection switch T1 is electrically connected to the anode of the diode SD3, and the cathode of the diode SD3 is electrically connected to the load RL.
Preferably, the protection circuit further includes a voltage dividing circuit;
the voltage dividing circuit comprises a resistor I R1, a resistor II R2 and a resistor III R7;
one end of the resistor I R1 is electrically connected with the source electrode of the protection switch T1, the other end of the resistor I R1, one end of the resistor II R2 and one end of the resistor III R7 are electrically connected with the grid electrode of the protection switch T1, the other end of the resistor II R2 is grounded, and the collector electrode of the transistor switch T2 is electrically connected with the other end of the resistor III R7.
Preferably, the resistances of the first resistor R1 and the second resistor R2 may be the same or different.
Preferably, the protection circuit further includes a loop forming circuit;
the loop forming circuit comprises a resistor four R5 and a diode two SD1;
one end of a resistor IV R5 is electrically connected with the base electrode of the transistor switch T2, the other end of the resistor IV R5 is electrically connected with the positive electrode of the diode II SD1, and the negative electrode of the diode II SD1 is electrically connected with the source electrode of the protection switch T1.
Preferably, the protection circuit further comprises a diode trisd 2 and a resistor pentar 6;
one end of the resistor pentar 6 is electrically connected with the cathode of the diode trisd 2 at one end of the diode two SD1 and the resistor four R5, and the other end of the resistor pentar 6 is electrically connected with the anode of the diode trisd 2 at the left side of the capacitor C1.
A hiccup type protection method, comprising:
when the hiccup type protection circuit equipment is started, namely, when no charge is arranged on the capacitor C1, the transistor switch T2 is turned on, the capacitor C1 is charged through a charging path, after the capacitor C1 is charged, the transistor switch T2 is turned off, and the protection switch T1 is turned on;
if the main circuit is over-current or short-circuited, the voltage VS of the collector of the transistor switch T2 is higher than the voltage VC on the left side of the capacitor C1, and the capacitor C1 is discharged through the third diode SD2 and the second diode SD1 in sequence until the voltage VC on the left side of the capacitor C1 is equal to the voltage V1 of the cathode of the second diode SD1, at this time, the protection switch T1 is turned off, and then the capacitor C1 is continuously charged;
if the main circuit does not have overcurrent or short circuit, the capacitor C1 is discharged, and during the discharging period, if the main circuit has overcurrent or short circuit, the protection switch T1 is turned off again, and the capacitor C1 is charged again; during the discharging period, if the main loop is not over-current or short-circuited all the time, the capacitor C1 is discharged completely, and then the capacitor C1 is not charged.
Preferably, the transistor switch T2 is a PNP transistor, and the gate voltage VG of the protection switch T1 can be changed by controlling the current flowing through the resistor tri R7 by turning on and off the transistor switch.
Preferably, the voltage drop generated by the main loop current I flowing through the sampling resistor R3 controls the switching state of the transistor switch T2:
when overcurrent or short-circuit state occurs in the main loop, when I3 is equal to R3 and is equal to Uon +USD1, the transistor switch T2 is in a conducting state, the protection switch T1 is cut off, and the hiccup type protection circuit equipment is in a protection state;
when the main loop does not have an overcurrent or short-circuit state, when the I3R 3 is less than Uon +USD1, the transistor switch T2 is in a closed state, the protection switch T1 is conducted, and the hiccup type protection circuit equipment is in a normal working state;
wherein I3 is the current flowing through the protection current sampling resistor, R3 is the resistance of the protection current sampling resistor, uon is the turn-on voltage between the emitter and the base of the transistor switch T2, and USD1 is the conduction voltage drop of the diode two SD 1.
Preferably, when the left voltage VC of the capacitor C1 is less than VS-Uon, the capacitor C1 is in a charged state, the transistor switch T2 is turned on, and the protection switch T1 is turned off;
when the voltage vc=vs-Uon, and the capacitor C1 is in a full state, the transistor switch T2 is turned off, and the protection switch T1 is turned on;
the protection switch T1 conducts the originally accumulated charges on the instant capacitor C1, and the discharge in the discharge state is immediately carried out through a discharge path to release; at this time, if the main loop current I has an overcurrent or short-circuit fault, the transistor switch T2 is turned back on due to the voltage drop of the protection current sampling resistor R3, and the protection switch T1 is turned off immediately, so that the capacitor C1 will repeat the process from the charging state to the full state to the discharging state, thereby enabling the main loop to output repeatedly in a hiccup manner until the short-circuit or overcurrent fault of the main loop is removed; when the main loop current I has no overcurrent or short-circuit fault, the transistor switch T2 will remain turned off, and the right voltage of the capacitor C1 is high, and the transistor switch T2 cannot continue to charge the capacitor C1, so that the continuous output state of the main loop is maintained.
Compared with the prior art, the invention has the beneficial effects that the invention is composed of simple devices such as a resistor, a capacitor, a diode, a transistor, a MOS tube and the like, and has simple circuit and low cost; the invention can be suitable for voltage occasions of 3.3V, 5V, 12V, 24V and higher by adjusting the withstand voltage parameters of the device, and has wide applicability; the protection current can be configured through the resistance value of the current sampling resistor R3 for protection; the protection retry interval time can be adjusted through the protection parameters such as the resistance-capacitance value of the resistor five R6 and the capacitor C1, so that the application occasion is wide, and the flexibility is good; the invention has high protection response sensitivity, fixed action time and small influence by environment; during the protection period, the invention outputs in an intermittent mode, the device can not continuously generate heat, and the power consumption and the service life of the whole machine can not be obviously influenced; and after the fault is removed, the output is automatically recovered, and the protection effect is good.
Drawings
FIG. 1 is a circuit diagram of a hiccup type protection circuit device of the present invention;
FIG. 2 is a schematic diagram of a simulation waveform of a hiccup-type protection circuit device according to the present invention operating normally without an overcurrent or short circuit in the main circuit;
fig. 3 is a schematic diagram of simulation waveforms of the hiccup type protection circuit device in the protection state of the main loop with overcurrent or short circuit.
Detailed Description
In the hiccup mode, the application of the hiccup type chip is that the port protection type chip is used as described in patent number 202120461631.9 and patent name of an overcurrent and overvoltage hiccup type protection circuit, and the main defects are that: the cost is high, the parameters such as working voltage level, recovery time and the like are generally fixed values and cannot be configured, and the protection parameters cannot be customized and the flexibility is limited.
In order to solve the above problems, the present invention achieves the following objects:
1. when the circuit outputs a high-side signal to the outside (other boards or external equipment), the internal circuit is ensured not to be damaged even if the external load has long-time overcurrent or short-circuit fault;
2. during the duration of the fault, there should be no sustained heating of the device, i.e. overall power consumption or lifetime impact;
3. after the external fault is removed, the external output can be automatically recovered;
4. the protection circuit has flexibility: the working voltage class of the protection circuit can be configured according to different application scenes, the current is protected, and the recovery time is prolonged;
5. the cost is controllable.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely expressed with reference to the drawings in the embodiments of the present invention. The embodiments expressed in this application are merely examples of some, but not all, of the inventions. Based on the spirit of the present invention, one of ordinary skill in the art would obtain additional embodiments without inventive faculty, all falling within the scope of the invention.
As shown in fig. 1, a hiccup type protection circuit device according to the present invention includes:
the main loop is provided with a current sampling resistor for protection and a protection switch;
the main loop is electrically connected with a protection circuit comprising a diode, a transistor switch and a capacitor, and the protection circuit is used for overcurrent or overvoltage protection of the main loop.
The protection circuit comprising the diode, the transistor switch and the capacitor is electrically connected with the main loop, can realize overcurrent or overvoltage protection of the main loop, and has simple circuit and low cost due to the simple devices such as the diode, the transistor switch and the capacitor.
In a preferred but non-limiting implementation method of the invention, the main loop comprises a voltage source VS1, a current sampling resistor R3 for protection, a protection switch T1 and a load RL which are connected in series in sequence;
the voltage source VS1 is used for generating a level signal input into the main loop, the voltage source VS1 is electrically connected with one end of the protection current sampling resistor R3, the protection current sampling resistor R3 is electrically connected with the source electrode of the protection switch T1, the drain electrode of the protection switch T1 is electrically connected with the load RL, and an electric signal output from the drain electrode of the protection switch T1 to the load RL is a high-side signal output externally. The protection switch T1 is a P-type MOS tube. The voltage of the high side signal is VOUT, and the current of the high side signal is Iout.
In a preferred but non-limiting embodiment of the present invention, the protection circuit includes a transistor switch T2, a capacitor C1 and a diode SD3;
the voltage source VS1 is electrically connected to the emitter of the transistor switch T2, the base of the transistor switch T2 is electrically connected to the left side of the capacitor C1, the collector of the transistor switch T2 is electrically connected to the gate of the protection switch T1, the right side of the capacitor C1, the drain of the protection switch T1 is electrically connected to the anode of the diode SD3, and the cathode of the diode SD3 is electrically connected to the load RL.
The gate voltage of the protection switch T1 is changed through the on/off of the transistor T2, so that the on-off of the protection switch T1 of the main loop is controlled; the hiccup protection effect is achieved through the charging and discharging of the capacitor C1, and the hiccup retry time can be configured through adjusting the charging time of the capacitor C1. The diode SD3 is a Schottky diode and can play a role in stabilizing voltage and current of a high-side signal.
The main loop current I flows through the voltage drop generated by the current sampling resistor R3 for protection to control the switching state of the transistor switch T2.
In a preferred but non-limiting embodiment of the present invention, the protection circuit further includes a voltage divider circuit:
the voltage dividing circuit comprises a resistor I R1, a resistor II R2 and a resistor III R7;
one end of the resistor I R1 is electrically connected with the source electrode of the protection switch T1, the other end of the resistor I R1, one end of the resistor II R2 and one end of the resistor III R7 are electrically connected with the grid electrode of the protection switch T1, the other end of the resistor II R2 is grounded, and the collector electrode of the transistor switch T2 is electrically connected with the other end of the resistor III R7.
In a preferred but non-limiting embodiment of the present invention, the first resistor R1 has the same resistance as the second resistor R2, and the third resistor R7 is a 0 ohm resistor.
Typically: vs1=12v, r1=r2, r7=0Ω.
When the transistor switch T2 is turned off: the gate voltage vg=r2/(r1+r2) =1/2 vs≡1/2VS1 of the protection switch T1 (VS 1 is the voltage source voltage);
GS voltage VGS of the protection switch T1 (GS voltage is the voltage between the gate and the source of the protection switch T1): VGS approximately equal to-1/2 vs1= -6V, and the protection switch T1 is in a conducting state;
when the transistor switch T2 is fully on: vg=r2/(r1// r7+r2) vs=vs;
GS voltage of protection switch T1: vgs≡0V, in the off state.
In a preferred but non-limiting embodiment of the invention, the protection circuit further comprises a loop forming circuit:
the loop forming circuit comprises a resistor four R5 and a diode two SD1;
one end of a resistor IV R5 is electrically connected with the base electrode of the transistor switch T2, the other end of the resistor IV R5 is electrically connected with the positive electrode of the diode II SD1, and the negative electrode of the diode II SD1 is electrically connected with the source electrode of the protection switch T1.
When the main loop is over-voltage and over-current or short-circuited, the transistor switch T2, the resistor four R5, the diode two SD1 and the protection current sampling resistor R3 form a loop, so that the transistor switch T2 is conducted. Diode two SD1 is a schottky diode.
In a preferred but non-limiting implementation of the present invention, the protection circuit further includes a diode trisd 2 and a resistor pentar 6;
one end of the resistor pentar 6 is electrically connected with the cathode of the diode trisd 2 at one end of the diode two SD1 and the resistor four R5, and the other end of the resistor pentar 6 is electrically connected with the anode of the diode trisd 2 at the left side of the capacitor C1.
In this way, the combination of the diode trisd 2 and the resistor pentar 6 can form a charge-discharge circuit of the capacitor C1 in combination with other electronic devices of the hiccup-type protection circuit device.
The hiccup type protection method provided by the invention comprises the following steps:
when the hiccup type protection circuit equipment is started, namely, when no charge is arranged on the capacitor C1, the transistor switch T2 is turned on, the capacitor C1 is charged through a charging path, after the capacitor C1 is charged, the transistor switch T2 is turned off, and the protection switch T1 is turned on;
if the main circuit is over-current or short-circuited, the voltage VS of the collector of the transistor switch T2 is higher than the voltage VC on the left side of the capacitor C1, and the capacitor C1 is discharged through the third diode SD2 and the second diode SD1 in sequence until the voltage VC on the left side of the capacitor C1 is equal to the voltage V1 of the cathode of the second diode SD1, at this time, the protection switch T1 is turned off, and then the capacitor C1 is continuously charged;
if the main circuit does not have overcurrent or short circuit, the capacitor C1 is discharged, and during the discharging period, if the main circuit has overcurrent or short circuit, the protection switch T1 is turned off again, and the capacitor C1 is charged again; during the discharging period, if the main loop is not over-current or short-circuited all the time, the capacitor C1 is discharged completely, and then the capacitor C1 is not charged.
Specifically, a current sampling resistor R3 for protection and a protection switch T1 are connected in series inside the main circuit;
the protection switch T1 is a P-type MOS tube, and the grid voltage of the protection switch T1 is determined by the serial-parallel connection relation of a resistor I R1, a resistor II R2 and a resistor III R7;
in a preferred but non-limiting embodiment of the present invention, the transistor switch T2 is a PNP transistor, and the current flowing through the resistor tri R7 can be controlled by turning on and off the transistor switch, so as to change the gate voltage VG of the protection switch T1.
In a preferred but non-limiting embodiment of the present invention, the first resistor R1 has the same resistance as the second resistor R2, and the third resistor R7 is a 0 ohm resistor.
Typically: vs1=12v, r1=r2, r7=0Ω.
When the transistor switch T2 is turned off: the gate voltage vg=r2/(r1+r2) =1/2 vs≡1/2VS1 of the protection switch T1 (VS 1 is the voltage source voltage);
GS voltage VGS of the protection switch T1 (GS voltage is the voltage between the gate and the source of the protection switch T1): VGS approximately equal to-1/2 vs1= -6V, and the protection switch T1 is in a conducting state;
when the transistor switch T2 is fully on: vg=r2/(r1// r7+r2) vs=vs;
GS voltage of protection switch T1: vgs≡0V, in the off state.
In a preferred but non-limiting embodiment of the invention, the voltage drop generated by the main loop current I flowing through the sampling resistor R3 controls the switching state of the transistor switch T2:
when overcurrent or short-circuit state occurs in the main loop, when I3 is equal to R3 and is equal to Uon +USD1, the transistor switch T2 is in a conducting state, the protection switch T1 is cut off, and the hiccup type protection circuit equipment is in a protection state;
when the main loop does not have an overcurrent or short-circuit state, when the I3R 3 is less than Uon +USD1, the transistor switch T2 is in a closed state, the protection switch T1 is conducted, and the hiccup type protection circuit equipment is in a normal working state;
the protection current Ip in the protection state is: (Uon +usd1)/R3, where I3 is the current flowing through the protection current sampling resistor, R3 is the resistance of the protection current sampling resistor, uon is the turn-on voltage between the emitter and the base of the transistor switch T2, and USD1 is the conduction voltage drop of the diode two SD 1.
The capacitor C1 can realize switching of charge and discharge states, and is a key device for forming hiccup type output.
The charging path of the capacitor C1 is: VS→e pole of T2→base of T2→R5→R6→C1→SD3→RL→GND.
The discharging path of the capacitor C1 is: C1→SD2→SD1→V1.
The charging and discharging paths of C1 are inconsistent, so that the charging current is far smaller than the discharging current.
In a preferred but non-limiting implementation of the invention, when the left voltage VC of the capacitor C1 is less than VS-Uon, the capacitor C1 is in a charged state, the transistor switch T2 is turned on, and the protection switch T1 is turned off;
when the voltage vc=vs-Uon, and the capacitor C1 is in a full state, the transistor switch T2 is turned off, and the protection switch T1 is turned on;
the protection switch T1 is conducted instantly, and the voltage on the right side of the capacitor C1 is immediately increased to be: emitter voltage VS-Iout R3 of transistor switch T2; the voltage VC at the left side of the capacitor C1 is raised due to lifting action, so that the voltage VC is far greater than the voltage V1, and the originally accumulated charges on the capacitor C1 can immediately execute discharge release of a discharge state through a discharge path; at this time, if the main loop current I has an overcurrent or short-circuit fault, the transistor switch T2 is turned back on due to the voltage drop of the protection current sampling resistor R3, and the protection switch T1 is turned off immediately, so that the capacitor C1 will repeat the process from the charging state to the full state to the discharging state, thereby enabling the main loop to output repeatedly in a hiccup manner until the short-circuit or overcurrent fault of the main loop is removed; when the main loop current I has no overcurrent or short-circuit fault, the transistor switch T2 will remain turned off, and the right voltage of the capacitor C1 is high, and the transistor switch T2 cannot continue to charge the capacitor C1, so that the continuous output state of the main loop is maintained.
As can be seen from the simulation waveform schematic diagram of the hiccup type protection circuit device in fig. 2, which normally works under the condition that the main circuit has no overcurrent or short circuit, and the simulation waveform schematic diagram of the hiccup type protection circuit device in fig. 3, which is in the protection state that the main circuit has the overcurrent or short circuit, the invention uses simple devices such as resistors, capacitors, diodes, transistors, MOS transistors and the like; the current flowing through the resistor three R7 is controlled through the on/off of the transistor switch T2, so that the gate voltage of the protection switch T1 is changed, and the on-off of the protection switch T1 of the main loop is controlled; the circuit protection current parameter is configured through the protection current sampling resistor R3; the hiccup protection effect is achieved through the charging and discharging of the capacitor C1, and the hiccup retry time can be configured through adjusting the charging time of the capacitor C1. According to the invention, the effect of adjusting the charging time of the capacitor C1 can be realized through the resistance value of the resistor five R6 and the capacitance value of the capacitor C1.
Compared with the prior art, the invention has the beneficial effects that the invention is composed of simple devices such as a resistor, a capacitor, a diode, a transistor, a MOS tube and the like, and has simple circuit and low cost; the invention can be suitable for voltage occasions of 3.3V, 5V, 12V, 24V and higher by adjusting the withstand voltage parameters of the device, and has wide applicability; the protection current can be configured through the resistance value of the current sampling resistor R3 for protection; the protection retry interval time can be adjusted through the protection parameters such as the resistance-capacitance value of the resistor five R6 and the capacitor C1, so that the application occasion is wide, and the flexibility is good; the invention has high protection response sensitivity, fixed action time and small influence by environment; during the protection period, the invention outputs in an intermittent mode, the device can not continuously generate heat, and the power consumption and the service life of the whole machine can not be obviously influenced; and after the fault is removed, the output is automatically recovered, and the protection effect is good.
The present disclosure can be a system, method, and/or computer program product. The computer program product can include a computer-readable storage medium having computer-readable program instructions embodied thereon for causing a processor to perform each aspect of the present disclosure.
The computer readable auxiliary medium can be a tangible power grid line capable of holding and auxiliary instructions for execution of the power grid line operations by the instructions. The computer readable accessory medium can be, but is not limited to, an electric accessory grid line, a magnetic accessory grid line, an optical accessory grid line, an electromagnetic accessory grid line, a semiconductor accessory grid line, or any suitable combination of the foregoing. Still further examples (non-enumerated list) of the computer-readable storage medium include: portable computer disk, hard disk, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static Random Access Memory (SRAM), portable compact disk read-only memory (HD-ROM), digital versatile disk (DXD), memory stick, floppy disk, mechanical code grid lines, punch cards like instructions attached thereto, or bump structures within grooves, optionally in combination with the above. Computer-readable storage media as used herein are not to be construed as transient messages themselves, such as radio waves or otherwise freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or otherwise transfer medium (just like optical pulses through a transmission line cable), or electrical messages transferred through wires.
The computer readable program instructions expressed herein can be downloaded from a computer readable storage medium to each of the extrapolated/processed power grid lines, or downloaded to an external computer or external storage power grid line via a wireless network, like the internet, a local area network, a wide area network, and/or a wireless network. Wireless networks can include copper transfer cables, transmission line transfer, wireless transfer, routers, firewalls, switches, WIFI device computers, and/or edge servers. The wireless network adapter card or wireless network port in each of the extrapolated/processed power grid lines receives computer-readable program instructions from the wireless network and forwards the computer-readable program instructions for storage in the computer-readable accompanying medium in each of the extrapolated/processed power grid lines.
The computer program instructions for performing the operations of the present disclosure can be assembler instructions, instruction set architecture (lSA) instructions, machine-related instructions, microcode, firmware instructions, condition definition values, or source code or object code written in a random convergence of one or more programming languages, including an object oriented programming language such as Sdallqala, H++ or the like, as opposed to conventional procedural programming languages, such as the "H" language or similar programming languages. The computer readable program instructions can be executed entirely on the client computer, partly on the client computer, as a single software package, partly on the client computer and partly on a remote computer or entirely on the remote computer or server. In a modality involving a remote computer, the remote computer can be connected to the client computer through an arbitrary other wireless network including a local area network (LAb) or a wide area network (UAb), or can be connected to an external computer (as if an internet service provider were employed to connect through the internet). In some embodiments, each aspect of the present disclosure is achieved by personalizing an electronic circuit, like a programmable logic circuit, a field programmable gate array (disposal platform), or a Programmable Logic Array (PLA), with operating values of computer readable program instructions.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, and any modifications and equivalents are intended to be encompassed by the scope of the claims.
Claims (4)
1. A method of protecting a hiccup-type protection circuit device, the hiccup-type protection circuit device comprising: the main loop is provided with a current sampling resistor for protection and a protection switch; the main loop is electrically connected with a protection circuit comprising a diode, a transistor switch and a capacitor, and the protection circuit is used for overcurrent or overvoltage protection of the main loop; the main loop comprises a voltage source VS1, a current sampling resistor R3 for protection, a protection switch T1 and a load RL which are sequentially connected in series; the voltage source VS1 is used for generating a level signal input into the main loop, the voltage source VS1 is electrically connected with one end of the protection current sampling resistor R3, the protection current sampling resistor R3 is electrically connected with the source of the protection switch T1, the drain of the protection switch T1 is electrically connected with the load RL, and an electric signal output from the drain of the protection switch T1 to the load RL is a high-side signal output externally; the protection circuit comprises a transistor switch T2, a capacitor C1 and a diode SD3; the voltage source VS1 is electrically connected with the emitter of the transistor switch T2, the base of the transistor switch T2 is electrically connected with the left side of the capacitor C1, the collector of the transistor switch T2 is electrically connected with the grid of the protection switch T1, the right side of the capacitor C1 and the drain of the protection switch T1 are electrically connected with the anode of the diode SD3, and the cathode of the diode SD3 is electrically connected with the load RL; the protection circuit further comprises a loop forming circuit, the loop forming circuit comprises a resistor IV R5 and a diode II SD1, one end of the resistor IV R5 is electrically connected with the base electrode of the transistor switch T2, the other end of the resistor IV R5 is electrically connected with the anode of the diode II SD1, and the cathode of the diode II SD1 is electrically connected with the source electrode of the protection switch T1; the protection circuit further comprises a diode trisd 2 and a resistor pentar 6, one end of the resistor pentar 6 is electrically connected with the cathode of the diode trisd 2 at one end of the diode two SD1 and the resistor four R5, the other end of the resistor pentar 6 is electrically connected with the anode of the diode trisd 2 at the left side of the capacitor C1, and the protection method comprises the following steps:
when the hiccup type protection circuit equipment is started, namely, when no charge is arranged on the capacitor C1, the transistor switch T2 is turned on, the capacitor C1 is charged through a charging path, after the capacitor C1 is charged, the transistor switch T2 is turned off, and the protection switch T1 is turned on;
if the main circuit is over-current or short-circuited, the voltage VS of the collector of the transistor switch T2 is higher than the voltage VC on the left side of the capacitor C1, and the capacitor C1 is discharged through the third diode SD2 and the second diode SD1 in sequence until the voltage VC on the left side of the capacitor C1 is equal to the voltage V1 of the cathode of the second diode SD1, at this time, the protection switch T1 is turned off, and then the capacitor C1 is continuously charged;
if the main circuit does not have overcurrent or short circuit, the capacitor C1 is discharged, and during the discharging period, if the main circuit has overcurrent or short circuit, the protection switch T1 is turned off again, and the capacitor C1 is charged again; during the discharging period, if the main loop is not over-current or short-circuited all the time, the capacitor C1 is discharged completely, and then the capacitor C1 is not charged.
2. The method of claim 1, wherein the protection circuit further comprises a voltage divider circuit, the voltage divider circuit comprises a resistor one R1, a resistor two R2 and a resistor three R7, one end of the resistor one R1 is electrically connected with the source electrode of the protection switch T1, the other end of the resistor one R1, one end of the resistor two R2 and one end of the resistor three R7 are electrically connected with the gate electrode of the protection switch T1, the other end of the resistor two R2 is grounded, the collector electrode of the transistor switch T2 is electrically connected with the other end of the resistor three R7, and the transistor switch T2 is a PNP triode, and is turned on and off by the resistor three R7 to control current flowing through the resistor three R7, thereby changing the gate voltage VG of the protection switch T1.
3. The hiccup-type protection method of a protection circuit device according to claim 1, wherein a main loop current I flows through a voltage drop generated by a protection current sampling resistor R3 to control a switching state of a transistor switch T2:
when overcurrent or short-circuit state occurs in the main loop, when I3 is equal to R3 and is equal to Uon +USD1, the transistor switch T2 is in a conducting state, the protection switch T1 is cut off, and the hiccup type protection circuit equipment is in a protection state;
when the main loop does not have an overcurrent or short-circuit state, when the I3R 3 is less than Uon +USD1, the transistor switch T2 is in a closed state, the protection switch T1 is conducted, and the hiccup type protection circuit equipment is in a normal working state;
wherein I3 is the current flowing through the protection current sampling resistor, R3 is the resistance of the protection current sampling resistor, uon is the turn-on voltage between the emitter and the base of the transistor switch T2, and USD1 is the conduction voltage drop of the diode two SD 1.
4. A method of protecting a hiccup-type protection circuit device according to claim 3, wherein when the voltage VC on the left side of the capacitor C1 is less than VS-Uon, the capacitor C1 is in a charged state, the transistor switch T2 is turned on, and the protection switch T1 is turned off;
when the voltage vc=vs-Uon, and the capacitor C1 is in a full state, the transistor switch T2 is turned off, and the protection switch T1 is turned on;
the protection switch T1 conducts the originally accumulated charges on the instant capacitor C1, and the discharge in the discharge state is immediately carried out through a discharge path to release; at this time, if the main loop current I has an overcurrent or short-circuit fault, the transistor switch T2 is turned back on due to the voltage drop of the protection current sampling resistor R3, and the protection switch T1 is turned off immediately, so that the capacitor C1 will repeat the process from the charging state to the full state to the discharging state, thereby enabling the main loop to output repeatedly in a hiccup manner until the short-circuit or overcurrent fault of the main loop is removed; when the main loop current I has no overcurrent or short-circuit fault, the transistor switch T2 will remain turned off, and the right voltage of the capacitor C1 is high, and the transistor switch T2 cannot continue to charge the capacitor C1, so that the continuous output state of the main loop is maintained.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311499139.0A CN117239673B (en) | 2023-11-13 | 2023-11-13 | Hiccup type protection circuit equipment and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311499139.0A CN117239673B (en) | 2023-11-13 | 2023-11-13 | Hiccup type protection circuit equipment and method |
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| CN117239673A CN117239673A (en) | 2023-12-15 |
| CN117239673B true CN117239673B (en) | 2024-03-22 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106033880A (en) * | 2015-03-09 | 2016-10-19 | 何曙光 | Hiccup type protection circuits for DC power supply |
| CN206595713U (en) * | 2017-03-28 | 2017-10-27 | 深圳豪成通讯科技有限公司 | A kind of surge protection circuit |
| CN216959308U (en) * | 2022-03-15 | 2022-07-12 | 采埃孚电驱动科技(沈阳)有限公司 | Current limiting circuit |
-
2023
- 2023-11-13 CN CN202311499139.0A patent/CN117239673B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106033880A (en) * | 2015-03-09 | 2016-10-19 | 何曙光 | Hiccup type protection circuits for DC power supply |
| CN206595713U (en) * | 2017-03-28 | 2017-10-27 | 深圳豪成通讯科技有限公司 | A kind of surge protection circuit |
| CN216959308U (en) * | 2022-03-15 | 2022-07-12 | 采埃孚电驱动科技(沈阳)有限公司 | Current limiting circuit |
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| CN117239673A (en) | 2023-12-15 |
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