CN104810781A - Protective device for protecting switching circuit and load - Google Patents
Protective device for protecting switching circuit and load Download PDFInfo
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- CN104810781A CN104810781A CN201510198330.0A CN201510198330A CN104810781A CN 104810781 A CN104810781 A CN 104810781A CN 201510198330 A CN201510198330 A CN 201510198330A CN 104810781 A CN104810781 A CN 104810781A
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Abstract
The invention provides a protective device for protecting a switching circuit and a load, and is applied to the field of the output load protection based on the failure detection. The protective device is used for, through a power supply detecting module, detecting the power failure situation in the system and outputting a power failure signal, and applied to various power detection situations, so the globality and security of the power detection are ensured. The power failure signal is converted by a switch module so as to generate an enable signal for driving the protection switch circuit, the enable signal is used for rapidly blocking the connection of the output load, so that the failure can be discovered in time while the failure is generated and the load work line can be effectively broken. The power and load can be protected and the hurt to the user caused by the failure of the power can be avoided.
Description
Technical field
The present invention relates to power protection field, particularly relate to a kind of protection switch circuit and load protector.
Background technology
Along with the requirement of people to medical technique level is more and more higher, less to wound, the hemorrhage less future development of traditional operation, facilitates the renewal of Medical Devices technology.As Digital Subtraction and intervene operation, chamber mirror technology and endoscope-assistant surgery, ultrasonic technique and ultrasound knife etc.Particularly ultrasound knife technology can make operation more accurately, without advantages such as the visual field in eschar generation, art are more clear be widely used in operation.
Also as this, make ultrasound knife technology application scenario determine it to have high requirements to the fail safe of Energy transmission, because the Energy transmission that ultrasound knife technology relies on has energy-rich radiation to export, if output can not be turned off in time when system malfunctions, so may cause patient and accidentally injure evil.And in existing power faiture safe, the control signal when system power supply breaks down for controlling Energy transmission can not turn off timely and effectively, and also there is the situation that response speed is unhappy and response is sensitive not.
So, those skilled in the art of the present technique wish can when ultrasound knife system power failure by designing one, turn off in time fast output loading and and make instruction of reporting to the police, thus effectively raise the fail safe of ultrasound knife system, export the accidental injury of patient harmful to reduce the system failure to the full extent.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of protection switch circuit and load protector, is the problem that cannot turn off effectively in time for solving in prior art output loading breaking down.
For achieving the above object and other relevant objects, the invention provides following technical scheme:
Scheme one
A kind of protection switch circuit, comprise the input of normally closed connection and the Enable Pin of output and confession reception enable signal, described Enable Pin receives enable signal and also drives the input of normally closed connection and output to disconnect according to it.
As the preferred version of above-mentioned protection switch circuit, described protection switch circuit comprises resistance R11, resistance R12, diode D11, diode D12 and metal-oxide-semiconductor Q11 and power supply V0, the drain electrode of described metal-oxide-semiconductor Q11 is as the input of described protection switch circuit, the source electrode of described metal-oxide-semiconductor Q11 is as the output of described protection switch circuit, the grid of described metal-oxide-semiconductor Q11 connects described power supply V0 by described resistance R11, the positive pole of described diode D11 connects the grid of described metal-oxide-semiconductor Q11, the negative pole of described diode D11 is as the Enable Pin of described protection switch circuit, the positive pole of described diode D12 connects the source electrode of described metal-oxide-semiconductor Q11 by described resistance R12, the negative pole of described diode D12 connects the Enable Pin of described protection switch circuit.
Scheme two
On the basis of such scheme one, the present invention also provides a kind of load protector, comprise: power detecting module, for obtaining the magnitude of voltage of power supply to be detected and itself and predetermined reference voltage value being compared, and generate a power failure signal when the magnitude of voltage Amplitude of Hypotensive of described power supply to be detected exceedes described predetermined reference voltage value, and exported; Switch module, connects described power detecting module, for receiving described power failure signal and generating an enable signal according to it, and is exported; Protection switch circuit module; comprise the input of normally closed connection and output and for the Enable Pin connecing described switch module, described Enable Pin connects described switch module to receive described enable signal and to disconnect to the input and output that drive normally closed connection according to it.
As the preferred version of above-mentioned load protector, described power detecting module is the described power supply to be detected of a confession detection is just, first power supply comparing unit of negative power signal, described first power supply comparing unit comprises resistance R51, resistance R52, resistance R53, resistance R54, resistance R55, resistance R56, pull-up resistor R57, electric capacity C51, voltage-stabiliser tube D51, predetermined reference voltage signal, and amplifier U51 and amplifier U52, the inverting input of described amplifier U51 connects predetermined reference voltage signal, the in-phase input end of described amplifier U51 connects the positive power signal in described survey power supply to be detected by resistance R51, and by electric capacity C51 ground connection, described resistance R53 is connected in parallel in the two ends of described electric capacity C51, the inverting input of described amplifier U52 connects predetermined reference voltage signal by resistance R52, and connect the negative power signal in described survey power supply to be detected by resistance R54, the negative pole of described voltage-stabiliser tube D51 connects the inverting input of described amplifier U52, the plus earth of described voltage-stabiliser tube D51, the in-phase input end of described amplifier U52 connects the in-phase input end of described amplifier U51 by resistance R55, and by resistance R56 ground connection, described amplifier U51 is connected described pull-up resistor R57 with the output of amplifier U52 and jointly as the output of described power detecting module.
As the preferred version of above-mentioned load protector, described power detecting module is the second source comparing unit that a confession detects that power supply described to be detected is positive power signal, described second source comparing unit comprises resistance R59, resistance R510, electric capacity C52 and comparator U53, the inverting input of described comparator U53 connects described predetermined reference voltage signal, the in-phase input end of described predetermined reference voltage signal connects described positive power signal to be detected by resistance R59, and by described electric capacity C52 ground connection, described resistance R510 is connected in parallel in the two ends of described electric capacity C52, the output of described electric capacity C52 as described second source comparing unit output and connect described pull-up resistor R57.
As the further optimization of above-mentioned two kinds of preferred versions, described switch module comprises metal-oxide-semiconductor Q41, resistance R41 and power supply V5, the grid of described metal-oxide-semiconductor Q41 connects the input of power detecting module as the input of switch module, the drain electrode of described metal-oxide-semiconductor Q41 as switch module output and be connected to described power supply V5 by described resistance R41, the source ground of described metal-oxide-semiconductor Q41.
As the one-step optimization again of above-mentioned further optimization, described protection switch circuit module comprises resistance R11, resistance R12, diode D11, diode D12 and metal-oxide-semiconductor Q11 and power supply, the drain electrode of described metal-oxide-semiconductor Q11 is as the input of described protection switch circuit, the source electrode of described metal-oxide-semiconductor Q11 is as the output of described protection switch circuit, the grid of described metal-oxide-semiconductor Q11 connects described power supply by described resistance R11, the positive pole of described diode D11 connects the grid of described metal-oxide-semiconductor Q11, the negative pole of described diode D11 is as the Enable Pin of described protection switch circuit, the positive pole of described diode D12 connects the source electrode of described metal-oxide-semiconductor Q11 by described resistance R12, the negative pole of described diode D12 connects the Enable Pin of described protection switch circuit.
To sum up; the present invention at least has following beneficial effect: the present invention carrys out fast driving protection switch circuit by enable signal and makes disconnection protection act; and provide abundant and selectable power detecting module simultaneously; to be applicable to various power detecting situation; ensure that the comprehensive of power detecting and fail safe; still further provides various early warning protection, fault can be found in time when breaking down and effective disconnecting consumers working line, reaching the object of protection system and patient simultaneously.So the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization
Accompanying drawing explanation
Fig. 1 is the execution mode schematic diagram of a kind of protection switch circuit provided by the invention.
The concrete implementing circuit figure of one that Fig. 2 is the circuit of protection switch described in Fig. 1.
Fig. 3 is the execution mode schematic diagram of a kind of load protector provided by the invention.
Fig. 4 is the concrete implementing circuit figure of one of power detecting module in a kind of load protector provided by the invention.
Fig. 5 is a kind of implementing circuit figure of the first power supply comparing unit in power detecting module.
Fig. 6 is a kind of implementing circuit figure of second source comparing unit in power detecting module.
Fig. 7 is a kind of implementing circuit figure of power detecting module.
Fig. 8 is a kind of execution mode circuit diagram of switch module.
Fig. 9 switch module and protection switch circuit carry out coordinating the circuit connection diagram realizing load protection.
Figure 10 is the another kind of execution mode circuit diagram of switch module.
Figure 11 is load protector provided by the invention a kind of application principle figure in practice.
Drawing reference numeral explanation
10 protection switch circuit
20 pwm signal outputs
30 loads
40 switch modules
50 power detecting modules
51 first power supply comparing units
511 reference voltage generation units
52 second source comparing units
Embodiment
Below by way of specific instantiation, embodiments of the present invention are described, those skilled in the art the content disclosed by this specification can understand other advantages of the present invention and effect easily.The present invention can also be implemented or be applied by embodiments different in addition, and the every details in this specification also can based on different viewpoints and application, carries out various modification or change not deviating under spirit of the present invention.It should be noted that, when not conflicting, the feature in following examples and embodiment can combine mutually.
It should be noted that, the diagram provided in following examples only illustrates basic conception of the present invention in a schematic way, then only the assembly relevant with the present invention is shown in graphic but not component count, shape and size when implementing according to reality is drawn, it is actual when implementing, and the kenel of each assembly, quantity and ratio can be a kind of change arbitrarily, and its assembly layout kenel also may be more complicated.
Embodiment 1
The invention provides a kind of protection switch circuit 10, see Fig. 1, show the execution mode schematic diagram of described protection switch circuit 10, as shown in the figure, protection switch circuit 10 is arranged between pwm signal output and load 30, protection switch circuit 10 comprises input and the output of normally closed connection, and for receiving the Enable Pin of enable signal, the input of protection switch circuit 10 connects pwm signal output 20, output connects load 30, the Enable Pin of protection switch circuit 10 is for receiving energy signal E and disconnecting to the input and output that drive normally closed connection according to it, the connection between pwm signal output 20 and load 30 is blocked with this.Enable signal can be generated when monitoring fault by protection switch circuit 10 or be become by Conversion fault enable signal to drive when the input of the normally closed connection in protection switch circuit 10 and output and disconnect rapidly, reach and load 30 is quit work and avoids load 30 to work on the object of the unexpected injury that may bring.
Particularly, composition graphs 2, give the concrete implementing circuit figure of one of protection switch circuit 10, as shown in Figure 2, protection switch circuit 10 is at least by resistance R11, resistance R12, diode D11, diode D12, and transistor is formed, wherein, in the present embodiment, N-type metal-oxide-semiconductor Q11 selected by transistor, the drain electrode of N-type metal-oxide-semiconductor Q11 connects pwm signal output 20, the source electrode of N-type metal-oxide-semiconductor Q11 connects load 30, the grid of N-type metal-oxide-semiconductor Q11 connects power supply V0 (concrete magnitude of voltage can be determined according to concrete performance) by resistance R11, the positive pole of diode D11 connects the grid of N-type metal-oxide-semiconductor Q11, the negative pole of diode D11 as protection switch circuit 10 Enable Pin and for connecting enable signal E, the positive pole of diode D12 connects the source electrode of N-type metal-oxide-semiconductor Q11 by resistance R12, the negative pole of diode D12 is connected to Enable Pin.The operation principle of protection switch circuit 10 is: under the effect of supply voltage V0 (such as 15V) (grid being equivalent to N-type metal-oxide-semiconductor Q11 keeps high level), conducting between the drain electrode of N-type metal-oxide-semiconductor Q11 and source electrode, can ensure like this to be in normally closed connection status between pwm signal output 20 and load 30, when Enable Pin receives enable signal E (low level), here enable signal E is Low level effective, the grid of N-type metal-oxide-semiconductor Q11 becomes low level, so be blocked between the drain electrode of N-type metal-oxide-semiconductor Q11 and source electrode, that is to say and keep blocking state between pwm signal output 20 and load 30, what but consider that pwm signal output 20 exports is pwm signal, if can signal E get involved just in time pwm signal be high level continue to export time get involved, even if so enable signal E moment that the drain electrode of N-type metal-oxide-semiconductor Q11 and source electrode are blocked, load 30 end also has of short duration output high level output, thus the object blocking load 30 and work cannot be reached in time and rapidly, therefore allowing the source electrode of N-type metal-oxide-semiconductor Q11 (that is to say at load 30 end) be connected with for the Enable Pin accessing enable signal E, so just can just can drag down the voltage of load 30 end when enable signal E gets involved immediately and allow load 30 quit work immediately.In the present embodiment, by between load 30 and Enable Pin successively series resistor R12 and diode D12 carry out further proof load 30 and can be stabilized in the voltage levvl of enable signal E, to avoid bringing secondary effect to load 30, to improve the stability of circuit being blocked device due to other signals of telecommunication.
It should be noted that, in above-described embodiment 1, described diode D11 and diode D12 also preferably can adopt voltage stabilizing didoe, but preferably the selection of accessory can't affect those skilled in the art for the understanding of technique scheme and enforcement, therefore it is preferred hereafter to repeat no more accessory.
Embodiment 2
On the basis of above-described embodiment 1, the present embodiment additionally provides a kind of load protection circuit device, can be blocked work in time for the protection of load 30 when system power supply breaks down, to reach the object of protection system safe operation and patient.Refer to Fig. 3, give the execution mode schematic diagram of a kind of load protection circuit device provided by the invention, described load protection circuit device is arranged between pwm signal output 20 and output loading 30, whether extremely come to cut off the connection between pwm signal output 20 and output loading 30 fast and effectively for monitoring power supply, as shown in Figure 3, described load protection circuit device at least comprises power detecting module 50, switch module 40, and protection switch circuit 10 module, wherein, power detecting module 50, switch module 40, and protection switch circuit connects successively, power detecting module 50 is for obtaining the magnitude of voltage of power supply to be detected and itself and predetermined reference voltage value being compared, and generate a power failure signal when the voltage step-down amplitude of described power supply to be detected exceedes described predetermined reference voltage value and exported, switch module 40 connects described power detecting module 50, for receiving described power failure signal and generating an enable signal according to it, protection switch circuit 10 module comprises input and the output of normally closed connection, and for connecing the Enable Pin of described switch module 40, described Enable Pin connects described switch module 40 to receive described enable signal and to disconnect to the input and output that drive normally closed connection according to it.
By the scheme of above-described embodiment 2; the ruuning situation of various power supply in acquisition system can be carried out by power detecting module 50; and export a power failure signal when arbitrary power failure; and via switch module 40, power failure signal is changed generation one in order to drive the enable signal of protection switch circuit 10 module; protection switch circuit 10 module blocks the connection between pwm signal output 20 and load 30 fast according to this enable signal, reaches protection power source and load 30 runs the object that may damage patient at power failure.
Embodiment 3
Composition graphs 4 again, the concrete implementing circuit figure of one of power detecting module 50 in above-described embodiment 2 is given in the present embodiment, due to multiple power supply signal may be comprised in power supply to be detected, such as just, negative power signal, positive power signal, therefore power detecting module 50 comprises multiple power supply comparing unit, as at least the first power supply comparing unit 51 in figure and multiple second source comparing unit 52, wherein, first power supply comparing unit 51 is just for detecting power supply to be detected, the situation of negative power signal, second source comparing unit 52 is for detecting the situation that power supply to be detected is positive power signal.Be to be understood that, described power detecting module 50 just can only have a power detecting power supply, be such as the first power supply comparing unit 51 or second source comparing unit 52, may also be the combination of the first power supply comparing unit 51 or second source comparing unit 52, will explain various power supply comparing unit in detail below.
Embodiment 4
Particularly, refer to Fig. 5, give a kind of implementing circuit figure of the first power supply comparing unit 51 in power detecting module 50, first power supply comparing unit 51 comprises resistance R51, resistance R52, resistance R53, resistance R54, resistance R55, resistance R56, pull-up resistor R57, electric capacity C51, voltage-stabiliser tube D51, predetermined reference voltage signal, and amplifier U51 and amplifier U52, the inverting input of amplifier U51 connects predetermined reference voltage signal, the in-phase input end of amplifier U51 connects the positive power signal V1 (such as+15V) in power supply to be detected by resistance R51, and by electric capacity C51 ground connection, resistance R53 is connected in parallel in the two ends of electric capacity C51, the inverting input of amplifier U52 connects predetermined reference voltage signal by resistance R52, and the negative power signal V2 (such as-15V) surveyed in power supply to be detected is connected by resistance R54, the negative pole of voltage-stabiliser tube D51 connects the inverting input of amplifier U52, the plus earth of voltage-stabiliser tube D51, the in-phase input end of amplifier U52 connects the in-phase input end of amplifier U51 by resistance R55, and by resistance R56 ground connection, amplifier U51 is connected pull-up resistor R57 with the output of amplifier U52 and jointly as the output of power detecting module 50.
By the circuit structure of above-described embodiment 4, can be used for being detected as in positive-negative power supply system, such as general by the voltage of power supply run amplitude be arranged on about 2V, be about 2V by predetermined reference voltage signal setting, so positive power signal V1 (such as+15V) if magnitude of voltage reduction amplitude exceed predetermined reference voltage signal magnitude of voltage (during as 2V) to 13V time, so the first power detecting will export a power failure signal (in the present embodiment, power failure signal is that high level is effective) at output (i.e. comparator U51); In like manner, negative power signal V2 (such as-15V) is also the same.
More specifically, predetermined reference voltage signal in the first power supply comparing unit 51 can be generated by a reference voltage generation unit 511, incorporated by reference to Fig. 5, reference voltage generation unit 511 is at least made up of a power supply voltage signal, resistance R511 and voltage-stabiliser tube D512, one end of described resistance R511 connects a described power supply V3, the other end as the reference voltage generation unit 511 output and be connected to the negative pole of described voltage-stabiliser tube D511, the plus earth of described voltage-stabiliser tube D511.The pressure value of what the output of reference voltage generation unit 511 exported is exactly predetermined reference voltage signal, be should be appreciated that in actual implementation process, can be regulated the pressure value of predetermined reference voltage signal, repeat no more here by resistance R511 and power supply V3 size.
Embodiment 5
Further, again see Fig. 6, show a kind of implementing circuit figure of second source comparing unit 52 in power detecting module 50, if shown in, second source comparing unit 52 comprises resistance R59, resistance R510, electric capacity C52 and comparator U53, the inverting input of comparator U53 connects predetermined reference voltage signal, the in-phase input end of comparator U53 connects described positive power signal (power supply V4) to be detected by resistance R59, and by described electric capacity C52 ground connection, described resistance R510 is connected in parallel in the two ends of described electric capacity C52, the output of described electric capacity C52 as described second source comparing unit 52 output and connect described pull-up resistor R57.Circuit structure in the present embodiment 5 can as power detecting module 50, for the situation only having or only need single positive supply to power in detection system.
Further, the first power supply comparing unit 51 in second source comparing unit 52 in above-described embodiment 5 and above-described embodiment 4 can also be carried out combination and be used as power detecting module 50, can see Fig. 7, be equivalent to second source comparing unit 52 be connected to predetermined reference voltage signal and come up between resistance R57, because in above-mentioned enforcement, 4 and 5 have given detailed connected mode, repeat no more here.
Embodiment 6
Refer to Fig. 8, give a kind of execution mode circuit diagram of breaker in middle module 40 of the present invention, as shown in the figure, described switch module 40 is transistor, wherein, transistor Q41 specifically selects N-type metal-oxide-semiconductor Q41, and the grid of N-type metal-oxide-semiconductor Q41 is for connecting power detecting module 50, the drain electrode of N-type metal-oxide-semiconductor Q41 connects a power supply V5 (15V) by resistance R41, and the source ground of N-type metal-oxide-semiconductor Q41 connects.
Particularly, protection switch circuit 10 module in load protection circuit device is the same with the circuit structure in embodiment 2, therefore repeat no more here, how the switch module 40 described in detail in the present embodiment 6 is carried out coordinating to realize load 30 with protection switch circuit 10 below to protect, incorporated by reference to Fig. 9, after the N-type metal-oxide-semiconductor Q41 grid in switch module 40 receives the power failure signal exported in power detecting module 50, the drain electrode of N-type metal-oxide-semiconductor Q41 and source conduction, thus make the Enable Pin ground connection of protection switch circuit 10, also be namely equivalent to switch module 40 and export one for low level enable signal, in such protection switch circuit 10, the drain electrode of N-type metal-oxide-semiconductor Q11 and source electrode are blocked, thus blocking-up load 30 works.
Preferably, can also be connected in series a light-emitting diode D41 again between the drain electrode of N-type metal-oxide-semiconductor Q41 and resistance R41 in fig. 8, like this, switch module 40 receives fault-signal when making drain electrode and the source conduction of N-type metal-oxide-semiconductor Q41, light-emitting diode D41 will be lit, to reach the object of instruction of reporting to the police.
Embodiment 7
Further, on the basis of above-described embodiment 6, again see Figure 10, give the another kind of execution mode circuit diagram of breaker in middle module 40 of the present invention, as shown in the figure, transistor Q42 and relay SW41 is also comprised in described switch module 40, wherein, transistor adopts N-type metal-oxide-semiconductor Q42 equally, the grid of metal-oxide-semiconductor Q42 connects normally closed switch one end of relay SW41, and the grid of metal-oxide-semiconductor Q42 also connects the power supply V6 of a 3.3V by resistance R42, the other end grounding connection of relay SW41, the drain electrode of metal-oxide-semiconductor Q42 connects the drain electrode of metal-oxide-semiconductor Q41, the source ground of metal-oxide-semiconductor Q42, relay SW41 is used for being detected thermal signal, and respond described overheated model to disconnect relay SW41 switch, such metal-oxide-semiconductor Q42 conducting, diode D41 is lit, also export a low level signal at switch module 40 output simultaneously.In the present embodiment, relay SW41 for being detected thermal signal and disconnecting the normally closed switch of relay SW41 after heat alarm being detected, and outwards exports an enable signal.
Further, in order to make those skilled in the art can understand technical scheme of the present invention better, exemplifying one of the present invention one below and practicing.Such as by the load protection circuit application of installation in the present invention in ultrasound knife medicine equipment, for the protection of output loading 30, refer to Figure 11, power detecting module 50 can adopt multiple power supply comparing unit to combine, then by described power detecting module 50 connecting valve module 40, and switch module 40 is connected respectively multiple protection switch circuit 10 connect (because, the situation of multiple output loading 30 may be there is) in reality, input and the output of each protection switch circuit 10 are connected PMW signal input part and output loading 30 respectively, the working condition of power supply in detection system is carried out by the power detecting module 50 in load protection circuit device provided by the invention, and when power failure by power detecting module 50 out-put supply fault-signal, receive this fault-signal via switch module 40 again and generate an enable signal according to it, and drive protection switch circuit 10 to work by this enable signal, the blocking-up of PMW signal output part with output loading 30 is connected, thus reach the object stopping load 30 to work fast, and then reach protection medical patient receive unexpected injury, also protection system is unlikely to be burned simultaneously.
In sum; load protection circuit device provided by the present invention; carry out fast driving protection switch circuit 10 by enable signal and make disconnection protection act; and provide abundant and selectable power detecting module 50 simultaneously; to be applicable to various power detecting situation; ensure that the comprehensive of power detecting and fail safe; still further provides various early warning protection; fault can be found in time when breaking down and effective disconnecting consumers 30 working line, reaching the object of protection system and patient simultaneously.So the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (10)
1. a load protector, is characterized in that, comprising:
Power detecting module, for obtaining the magnitude of voltage of power supply to be detected and itself and predetermined reference voltage value being compared, and generates a power failure signal when the magnitude of voltage Amplitude of Hypotensive of described power supply to be detected exceedes described predetermined reference voltage value, and is exported;
Switch module, connects described power detecting module, for receiving described power failure signal and generating an enable signal according to it, and is exported;
Protection switch circuit module; comprise the input of normally closed connection and output and for the Enable Pin connecing described switch module, described Enable Pin connects described switch module to receive described enable signal and to disconnect to the input and output that drive normally closed connection according to it.
2. load protector according to claim 1, it is characterized in that, described power detecting module is the described power supply to be detected of a confession detection is just, first power supply comparing unit of negative power signal, described first power supply comparing unit comprises resistance R51, resistance R52, resistance R53, resistance R54, resistance R55, resistance R56, pull-up resistor R57, electric capacity C51, voltage-stabiliser tube D51, predetermined reference voltage signal, and amplifier U51 and amplifier U52, the inverting input of described amplifier U51 connects predetermined reference voltage signal, the in-phase input end of described amplifier U51 connects the positive power signal in described survey power supply to be detected by resistance R51, and by electric capacity C51 ground connection, described resistance R53 is connected in parallel in the two ends of described electric capacity C51, the inverting input of described amplifier U52 connects predetermined reference voltage signal by resistance R52, and connect the negative power signal in described survey power supply to be detected by resistance R54, the negative pole of described voltage-stabiliser tube D51 connects the inverting input of described amplifier U52, the plus earth of described voltage-stabiliser tube D51, the in-phase input end of described amplifier U52 connects the in-phase input end of described amplifier U51 by resistance R55, and by resistance R56 ground connection, described amplifier U51 is connected described pull-up resistor R57 with the output of amplifier U52 and jointly as the output of described power detecting module.
3. load protector according to claim 1, it is characterized in that, described power detecting module is the second source comparing unit that a confession detects that power supply described to be detected is positive power signal, described second source comparing unit comprises resistance R59, resistance R510, electric capacity C52 and comparator U53, the inverting input of described comparator U53 connects described predetermined reference voltage signal, the in-phase input end of described predetermined reference voltage signal connects described positive power signal to be detected by resistance R59, and by described electric capacity C52 ground connection, described resistance R510 is connected in parallel in the two ends of described electric capacity C52, the output of described electric capacity C52 as described second source comparing unit output and connect described pull-up resistor R57.
4. the load protector according to Claims 2 or 3; it is characterized in that; one is also comprised for the reference voltage generation unit generating described predetermined reference voltage signal in described first power supply comparing unit; described reference voltage generation unit is at least made up of a power supply voltage signal V4, resistance R511 and voltage-stabiliser tube D512; one end of described resistance R511 connects a described power supply voltage signal V4; the other end as the reference voltage generation unit output and be connected to the negative pole of described voltage-stabiliser tube D511, the plus earth of described voltage-stabiliser tube D511.
5. the load protector according to Claims 2 or 3; it is characterized in that; described switch module comprises metal-oxide-semiconductor Q41, resistance R41 and power supply V5; the grid of described metal-oxide-semiconductor Q41 connects the input of power detecting module as the input of switch module; the drain electrode of described metal-oxide-semiconductor Q41 as switch module output and be connected to described power supply V5 by described resistance R41, the source ground of described metal-oxide-semiconductor Q41.
6. load protector according to claim 5; it is characterized in that; described switch module also comprises a relay SW41, metal-oxide-semiconductor Q42 and resistance R42 and power supply V6; the grid of described metal-oxide-semiconductor Q42 connects normally closed switch one end of described relay SW41; and be connected to described power supply V6 by resistance R42; the normally closed switch other end ground connection of described relay SW41; the switch triggering end of described relay SW41 supplies in response to heat alarm; the drain electrode of described metal-oxide-semiconductor Q42 connects the drain electrode of described metal-oxide-semiconductor Q41, the source ground of described metal-oxide-semiconductor Q42.
7. load protector according to claim 5, is characterized in that, the drain electrode of described metal-oxide-semiconductor Q41 and resistance R41 connection line are also in series with a light-emitting diode D41.
8. load protector according to claim 5, it is characterized in that, described protection switch circuit module comprises resistance R11, resistance R12, diode D11, diode D12 and metal-oxide-semiconductor Q11 and power supply, the drain electrode of described metal-oxide-semiconductor Q11 is as the input of described protection switch circuit, the source electrode of described metal-oxide-semiconductor Q11 is as the output of described protection switch circuit, the grid of described metal-oxide-semiconductor Q11 connects described power supply by described resistance R11, the positive pole of described diode D11 connects the grid of described metal-oxide-semiconductor Q11, the negative pole of described diode D11 is as the Enable Pin of described protection switch circuit, the positive pole of described diode D12 connects the source electrode of described metal-oxide-semiconductor Q11 by described resistance R12, the negative pole of described diode D12 connects the Enable Pin of described protection switch circuit.
9. a protection switch circuit, is characterized in that, comprise the input of normally closed connection and the Enable Pin of output and confession reception enable signal, described Enable Pin receives enable signal and also drives the input of normally closed connection and output to disconnect according to it.
10. protection switch circuit according to claim 9, it is characterized in that, described protection switch circuit comprises resistance R11, resistance R12, diode D11, diode D12 and metal-oxide-semiconductor Q11 and power supply V0, the drain electrode of described metal-oxide-semiconductor Q11 is as the input of described protection switch circuit, the source electrode of described metal-oxide-semiconductor Q11 is as the output of described protection switch circuit, the grid of described metal-oxide-semiconductor Q11 connects described power supply V0 by described resistance R11, the positive pole of described diode D11 connects the grid of described metal-oxide-semiconductor Q11, the negative pole of described diode D11 is as the Enable Pin of described protection switch circuit, the positive pole of described diode D12 connects the source electrode of described metal-oxide-semiconductor Q11 by described resistance R12, the negative pole of described diode D12 connects the Enable Pin of described protection switch circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510198330.0A CN104810781B (en) | 2015-04-24 | 2015-04-24 | A kind of protective switch circuit and load protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510198330.0A CN104810781B (en) | 2015-04-24 | 2015-04-24 | A kind of protective switch circuit and load protector |
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| CN201510198330.0A Active CN104810781B (en) | 2015-04-24 | 2015-04-24 | A kind of protective switch circuit and load protector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599747A (en) * | 2018-04-09 | 2018-09-28 | 北京市科通电子继电器总厂有限公司 | Dual signal on-off control circuit and system |
| CN111766533A (en) * | 2019-04-01 | 2020-10-13 | 宁德时代新能源科技股份有限公司 | Fault detection circuit and fault detection method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8040647B2 (en) * | 2008-11-11 | 2011-10-18 | Infineon Technologies Austria Ag | System and method for protection against loss of battery in reverse battery protected devices |
| CN103117536A (en) * | 2013-01-15 | 2013-05-22 | 费新华 | Storage battery protective circuit |
| CN104242252A (en) * | 2013-06-14 | 2014-12-24 | 海洋王（东莞）照明科技有限公司 | Battery over-discharge protecting circuit |
| CN104319742A (en) * | 2014-10-28 | 2015-01-28 | 无锡中星微电子有限公司 | Battery protection circuit |
| CN204651881U (en) * | 2015-04-24 | 2015-09-16 | 重庆康美唯外科器械有限公司 | A kind of protection switch circuit and load protector |
-
2015
- 2015-04-24 CN CN201510198330.0A patent/CN104810781B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8040647B2 (en) * | 2008-11-11 | 2011-10-18 | Infineon Technologies Austria Ag | System and method for protection against loss of battery in reverse battery protected devices |
| CN103117536A (en) * | 2013-01-15 | 2013-05-22 | 费新华 | Storage battery protective circuit |
| CN104242252A (en) * | 2013-06-14 | 2014-12-24 | 海洋王（东莞）照明科技有限公司 | Battery over-discharge protecting circuit |
| CN104319742A (en) * | 2014-10-28 | 2015-01-28 | 无锡中星微电子有限公司 | Battery protection circuit |
| CN204651881U (en) * | 2015-04-24 | 2015-09-16 | 重庆康美唯外科器械有限公司 | A kind of protection switch circuit and load protector |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599747A (en) * | 2018-04-09 | 2018-09-28 | 北京市科通电子继电器总厂有限公司 | Dual signal on-off control circuit and system |
| CN108599747B (en) * | 2018-04-09 | 2022-06-28 | 北京市科通电子继电器总厂有限公司 | Double-signal on-off control circuit and system |
| CN111766533A (en) * | 2019-04-01 | 2020-10-13 | 宁德时代新能源科技股份有限公司 | Fault detection circuit and fault detection method |
| CN111766533B (en) * | 2019-04-01 | 2021-10-01 | 宁德时代新能源科技股份有限公司 | Fault detection circuit and fault detection method |
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| Publication number | Publication date |
|---|---|
| CN104810781B (en) | 2019-01-22 |
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