CN217216529U - Output control circuit and operation equipment - Google Patents
Output control circuit and operation equipment Download PDFInfo
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- CN217216529U CN217216529U CN202221002193.0U CN202221002193U CN217216529U CN 217216529 U CN217216529 U CN 217216529U CN 202221002193 U CN202221002193 U CN 202221002193U CN 217216529 U CN217216529 U CN 217216529U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The application provides an output control circuit and operation equipment, and relates to the field of output control. The output control circuit comprises a main power supply, a switch element and a first control module, wherein the first control module comprises a first control unit and a first one-way conductive unit, the positive pole of the main power supply is connected with the positive pole of a target load, the negative pole of the main power supply is connected with a first conduction end of the switch element, a second conduction end of the switch element is connected with the negative pole of the target load, the control end of the switch element is connected with the output end of the first one-way conductive unit, and the input end of the first one-way conductive unit is connected with the first control unit. Through addding first one-way electrically conductive unit in this application, after first control module closes, the impedance of first one-way electrically conductive unit can be regarded as infinity to improved first control module's equivalent impedance, avoided when the shutoff, the problem that the load still can detect out voltage has improved the security of circuit.
Description
Technical Field
The utility model relates to an output control field particularly, relates to an output control circuit and operation equipment.
Background
At present, power output control circuits are widely applied to various fields, so that in terms of cost and design difficulty, the power output control circuits generally adopt low-side control, namely, on-off of a load ground and a power ground is controlled, and control over power output is achieved.
However, in the conventional power output control circuit, when the control switch part is turned off, the equivalent impedance is often small, and when the impedance of the target load is large, even if the control switch part is turned off, the voltage can still be detected on the external load, so that certain potential safety hazard exists.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an output control circuit and operation equipment can at least partial solution above-mentioned problem.
The utility model provides a technical scheme:
in a first aspect, the present application provides an output control circuit comprising a primary power supply, a switching element and a first control module;
the first control module comprises a first control unit and a first one-way conductive unit;
the positive electrode of the main power supply is connected with the positive electrode of a target load, the negative electrode of the main power supply is connected with the first conduction end of the switch element, the second conduction end of the switch element is connected with the negative electrode of the target load, and the control end of the switch element is connected with the output end of the first one-way conduction unit;
the input end of the first unidirectional conductive unit is connected with the first control unit.
Optionally, the first unidirectional conducting unit includes a first diode, a cathode of the first diode is connected to the control terminal of the switching element, and an anode of the first diode is connected to the first control unit.
Optionally, the first unidirectional conducting unit includes an MOS transistor, the MOS transistor includes a body diode, a cathode of the body diode is connected to the control terminal of the switching element, and an anode of the body diode is connected to the first control unit.
Optionally, the first control unit includes a first control power supply and a first switch tube, a first conducting end of the first switch tube is connected to the positive electrode of the first control power supply, a second conducting end of the first switch tube is connected to the input end of the first unidirectional conducting unit, and a control end of the first switch tube is grounded.
Optionally, the first control unit further includes a second diode, an anode of the second diode is connected to the anode of the first control power supply, and a cathode of the second diode is connected to the first conduction end of the first switching tube.
Optionally, the output control circuit further includes a second control module, one end of the second control module is connected to the negative electrode of the target load, and the other end of the second control module is grounded.
Optionally, the second control module includes a second unidirectional conductive unit and a second control unit, one end of the second unidirectional conductive unit is connected to the negative electrode of the target load, the other end of the second unidirectional conductive unit is connected to the second control unit, and the second control unit is grounded.
Optionally, the second control unit includes a second control power supply and a second switch tube, a control end of the second switch tube is connected to an anode of the second control power supply, a first conduction end of the second switch tube is connected to the second unidirectional conductive unit, and a second conduction end of the second switch tube is grounded.
Optionally, the second control unit further includes a first resistor, one end of the first resistor is connected to the second unidirectional conductive unit, and the other end of the first resistor is connected to the first conduction end of the second switching tube.
In a second aspect, the present application provides a work apparatus including the output control circuit.
The utility model provides an output control circuit and operation equipment's beneficial effect is:
the application provides an output control circuit and operation equipment, this output control circuit includes the main power supply, switch element and first control module, first control module includes first control unit and first one-way electrically conductive unit, the positive pole of main power supply is connected with the positive pole of target load, the negative pole of main power supply is connected with switch element's first end of switching on, switch element's second end of switching on is connected with the negative pole of target load, switch element's control end is connected with the output of first one-way electrically conductive unit, the input and the first control unit of first one-way electrically conductive unit are connected. Through addding first one-way electrically conductive unit in this application, after first control module closes, the impedance of first one-way electrically conductive unit can be regarded as infinity to improved first control module's equivalent impedance, avoided when the shutoff, the problem that the load still can detect out voltage has improved the security of circuit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of an output control circuit according to an embodiment of the present invention;
fig. 2 is a second schematic structural diagram of an output control circuit according to an embodiment of the present invention;
fig. 3 is a third schematic structural diagram of an output control circuit according to an embodiment of the present invention;
fig. 4 is a fourth schematic structural diagram of an output control circuit according to an embodiment of the present invention;
fig. 5 is a fifth schematic structural diagram of an output control circuit according to an embodiment of the present invention;
fig. 6 is a sixth schematic structural diagram of an output control circuit according to an embodiment of the present invention;
fig. 7 is a seventh schematic structural diagram of an output control circuit according to an embodiment of the present invention;
fig. 8 is an eighth schematic structural diagram of an output control circuit according to an embodiment of the present invention.
Icon: 100-an output control circuit; 10-a first control module; qs-switching element; vz-main power supply; d1 — first diode; v1 — first control supply; d2 — second diode; q1-first switch tube; 110-a first control unit; 120-a first unidirectional conductive element; 20-a second control module; 210-a second unidirectional conductive element; 220-a second control unit; q2-second switch tube; v2 — second control supply; r1 — first resistance; d3 — third diode; q3-third switch tube, Q4-fourth switch tube, Q5-fifth switch tube, R2-second resistor, R3-third resistor, R4-fourth resistor, V3-third control power supply, V4-fourth control power supply and D4-fourth diode.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.
As described in the background art, currently, power output control circuits are widely used in various fields, so that in terms of cost and design difficulty, the power output control circuits generally adopt low-side control, that is, control on/off of a load ground and a power ground, so as to control power output. However, in the conventional power output control circuit, when the control switch part is turned off, the equivalent impedance is often small, and when the impedance of the target load is large, even if the control switch part is turned off, the voltage can still be detected on the target load, so that certain potential safety hazard exists.
In view of the above, in order to improve the safety of the output control circuit, please refer to fig. 1, in which an embodiment of the present application provides an output control circuit 100, which can effectively increase the equivalent impedance of the control switch, so as to eliminate the voltage existing on the load when the switch is turned off, thereby improving the safety of the circuit.
The output control circuit 100 includes a main power supply Vz, a switching element Qs, and a first control module 10.
The first control module 10 includes a first control unit 110 and a first unidirectional conductive unit 120.
The positive electrode of the main power supply Vz is connected with the positive electrode of the target load, the negative electrode of the main power supply Vz is connected with the first conduction end of the switching element Qs, the second conduction end of the switching element Qs is connected with the negative electrode of the target load, and the control end of the switching element Qs is connected with the output end of the first unidirectional conducting unit 120.
The input terminal of the first unidirectional conductive unit 120 is connected to the first control unit 110.
In this embodiment, the first unidirectional conductive unit 120 is additionally disposed on the original output control circuit, when the first control module 10 is turned on, the control signal can be transmitted to the switching element Qs through the first unidirectional conductive unit 120, thereby implementing the control of the switching element Qs, and after the first control module 10 is turned off, the unidirectional conductivity of the first unidirectional conductive unit 120 is utilized, at this time, the impedance of the first control module 10 can be regarded as infinite, thereby effectively improving the equivalent resistance of the first control module 10, even if the impedance of the target load is large, at this time, no voltage appears on the target load, thereby improving the safety performance of the whole output control circuit 100.
It should be noted that, in this embodiment, the first unidirectional conductive unit 120 may be an electronic component having a unidirectional conductive function, such as a diode, a MOS transistor, a relay, and the like, or may be a circuit having a unidirectional conductive function and composed of a plurality of electronic components, and is not limited in this embodiment.
In order to better reduce the design and manufacturing cost of the circuit, in a possible embodiment, please refer to fig. 2 in combination, a single diode may be selected as the first unidirectional conductive unit 120, that is, the first unidirectional conductive unit 120 includes a first diode D1, a cathode of the first diode D1 is connected to the control terminal of the switching element Qs, and an anode of the first diode D1 is connected to the first control unit 110.
In this embodiment, the first diode D1 is used as the first unidirectional conducting unit 120, and the unidirectional conductivity of the diode is utilized to increase the equivalent impedance of the first control module 10 when the first control module is turned off, which not only can solve the problem of a certain potential safety hazard caused by a small switch impedance in the prior art, but also has the advantages of simple structure and low cost.
As another implementation of the embodiment of the present application, in order to improve the diversity of the power control manner, in another possible implementation manner, the first unidirectional conducting unit 120 includes a MOS transistor, the MOS transistor includes a body diode, a cathode of the body diode is connected to the control terminal of the switching element Qs, and an anode of the body diode is connected to the first control unit 110.
It should be noted that, in this embodiment, the control terminal of the MOS transistor may be set according to the actual requirement of the specific circuit, and this embodiment not only utilizes the one-way conductivity of the body diode, but also can implement diversified control of the circuit by adding the switching function of the MOS transistor.
In this embodiment, the on or off of the switching element Qs is substantially determined by the control signal generated by the first control unit 110, the first control unit 110 may be a chip or a simple circuit structure, and referring to fig. 3, in order to simplify the circuit structure and save the circuit cost, the first control unit 110 includes a first control power source V1 and a first switch Q1, a first conducting terminal of the first switch Q1 is connected to the positive electrode of the first control power source V1, a second conducting terminal of the first switch Q1 is connected to the input terminal of the first unidirectional conducting unit 120, and a control terminal of the first switch Q1 is grounded.
In the present embodiment, the first control power source V1 provides an electrical signal to the first switch Q1, and the first switch Q1 is turned on, and sends a corresponding control signal to the switch device Qs to turn on or off the switch device Qs.
In this embodiment, the control of the switching element Qs is substantially realized by an electric signal generated by the first control power supply V1, where the first control power supply V1 may be an independent power supply with a controller, or may be a level output pin of a control chip, and is not limited in this embodiment.
Specifically, when the first control power source V1 is an independent power source, the control of the switching element Qs can be realized by operating the controller therein. When the first control power supply V1 is a level output pin of the control chip, the control of the switching element Qs can be realized by the control logic of the control chip itself.
Meanwhile, in order to avoid the current in the first switch Q1 flowing back to the first control power source V1 and causing damage to the power source, in another possible implementation manner, please refer to fig. 3, the first control unit 110 further includes a second diode D2, an anode of the second diode D2 is connected to the anode of the first control power source V1, and a cathode of the second diode D2 is connected to the first conducting terminal of the first switch Q1.
In the present embodiment, the second diode D2 is disposed between the first control power source V1 and the first switch Q1, so that the current flowing back to the first control power source V1 can be effectively prevented from damaging the power source.
In the above embodiments, the low-side control is realized by controlling the switching element Qs, and in order to better improve the effect of the low-side control, in another possible implementation manner, please refer to fig. 4, the output control circuit 100 further includes a second control module 20, one end of the second control module 20 is connected to the negative electrode of the target load, and the other end of the second control module 20 is grounded.
In this embodiment, one end of the second control module 20 is connected to the negative electrode of the target load, and the other end of the second control module 20 is grounded, so that the low-side control of the circuit can be realized by controlling the on-state of the second control module 20.
In this embodiment, the second control module 20 is additionally provided on the basis of the switching element Qs, not only the low-side control of the circuit can be realized by controlling the switching element Qs, but also the low-side control of the circuit can be realized by the second control module 20, and the dual control mode can effectively improve the control effect.
Similarly, the second control module 20 is used as a control switch, and when the impedance of the target load is high, even if the second control module 20 is turned off, the voltage can still be detected on the target load, so that certain potential safety hazard exists.
Therefore, in another possible embodiment, referring to fig. 5, the second control module 20 includes a second unidirectional conductive unit 210 and a second control unit 220, one end of the second unidirectional conductive unit 210 is connected to the negative electrode of the target load, the other end of the second unidirectional conductive unit 210 is connected to one end of the second control unit 220, and the other end 220 of the second control unit is grounded.
It should be noted that the second control unit 220 in the present embodiment does not have exactly the same function as the first control unit 110 in the above embodiment, and the first control unit 110 in the above embodiment is used to control the conducting state of the switching element Qs to realize the low-side control, whereas in the present embodiment, the second control unit 220 can realize the low-side control by controlling the conducting state thereof, and the functions of the two are obviously different.
In this embodiment, by providing the second unidirectional conducting unit 210 and using the unidirectional conductivity of the second unidirectional conducting unit 210, the equivalent impedance of the whole second control module 20 can be improved when the second control unit 220 is turned off, so that the problem that when the impedance of the target load is large, even if the second control module 20 is turned off, the voltage can still be detected on the target load, and thus a certain potential safety hazard exists can be effectively avoided.
In order to better understand the technical solution of the embodiment, the following detailed description is made on the specific principle of the second control module 20:
in this embodiment, the second control module 20 includes a second control unit 220 and a second unidirectional conducting unit 210, wherein the second control unit 220 is connected to the negative electrode of the target load through the second unidirectional conducting unit 210, the second control unit 220 is grounded, when the second control unit 220 is turned on, the current in the target load flows to the second control unit 220 through the second unidirectional conducting unit 210, and is grounded through the second control unit 220, so as to implement the low-side control.
When the second control unit 220 is turned off, because of the unidirectional conductivity of the second unidirectional conductive unit 210, at this time, the current cannot flow to the target load through the second unidirectional conductive unit 210, so that the equivalent impedance of the whole second control module 20 is increased, the voltage on the target load can be effectively eliminated, and the safety of the circuit is improved.
It should be noted that, in the present embodiment, the function of the second unidirectional conductive unit 210 is the same as that of the first unidirectional conductive unit 120, and the second unidirectional conductive unit 210 may be an electronic component with a unidirectional conductive function, such as a diode, a MOS transistor, a relay, etc., or a circuit with a unidirectional conductive function composed of a plurality of electronic components, and is not limited in this embodiment.
Similarly, in this embodiment, the second control unit 220 may be a chip or a simple circuit structure, and in an alternative embodiment, please refer to fig. 6, in order to simplify the circuit structure and save the circuit cost, the second control unit 220 includes a second control power source V2 and a second switch Q2, a control terminal of the second switch Q2 is connected to the positive electrode of the second control power source V2, a first conduction terminal of the second switch Q2 is connected to the second unidirectional conducting unit 210, and a second conduction terminal of the second switch Q2 is grounded.
It should be noted that the second control power supply V2 in this embodiment may be an independent power supply with a controller, or may be a level output pin of a control chip, and is not particularly limited in this embodiment.
It should be noted that the control terminal of the switch tube in this application is different according to the type of the switch tube, for example, when the switch tube is a triode, the control terminal is the base of the triode, and when the switch tube is a MOS tube, the control terminal is the gate of the MOS tube.
The first conducting end and the second conducting end of the switch tube are only exemplary illustrations, different types of switch tubes are in different circuits, and the first conducting end and the second conducting end of the switch tube have certain differences which can be set according to actual needs, and the range to be protected by the switch tube is not influenced.
In order to avoid the current in the target load from being too large and damaging the second switch Q2, in another possible implementation manner, please refer to fig. 6, the second control unit 220 further includes a first resistor R1, one end of the first resistor R1 is connected to the second unidirectional conducting unit 210, and the other end of the first resistor R1 is connected to the first conducting end of the second switch Q2.
In this embodiment, the first resistor R1 is provided to play a certain current limiting role, so as to avoid damage to the second switch tube Q2.
Referring to fig. 7, in another possible implementation, the first switch Q1 and the second switch Q2 are both triodes, the base of the first switch Q1 is grounded, the emitter of the first switch Q1 is connected to the cathode of the second diode D2, and the collector of the first switch Q1 is connected to the anode of the first diode D1; the base of the second switching tube Q2 is connected with the second control power supply V2, the collector of the second switching tube Q2 is connected with the first resistor R1, and the emitter of the second switching tube Q2 is grounded.
The switching element Qs is a MOS transistor, a gate of the switching element Qs is connected to a cathode of the first diode D1, a source of the switching element Qs is connected to a target load, and a drain of the switching element Qs is grounded.
The second unidirectional conductive unit 210 includes a third diode D3, an anode of the third diode D3 is connected to the target load, and a cathode is connected to the first resistor R1.
Referring to fig. 8, the output control circuit 100 according to the embodiment of the present disclosure further includes an external module 30, where the external module 30 is a control module, and includes a third switching tube Q3, a fourth switching tube Q4, a fifth switching tube Q5, a second resistor R2, a third resistor R3, a fourth resistor R4, a third control power supply V3, a fourth control power supply V4, and a fourth diode D4;
a first conduction terminal of the fifth switching tube Q5 is connected to the switching element Qs, a second conduction terminal of the fifth switching tube Q5 is grounded, a control terminal of the fifth switching tube Q5 is connected to an anode of a fourth diode D4, the fourth diode D4 is connected in parallel with the second resistor R2, a cathode of the fourth diode D4 is connected between an emitter of the third switching tube Q3 and an emitter of the fourth switching tube Q4, a collector of the fourth switching tube Q4 is grounded, a collector of the third switching tube Q3 is connected to the third control power source V3, one end of the third resistor R3 is connected between a base of the third switching tube Q6329 and a base of the fourth switching tube Q6384, the other end of the third resistor R3 is connected between an anode of the fourth control power source V4 and one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected to a collector of the fourth switching tube Q5, and a cathode of the third control power source V4 and a cathode of the fourth control power source V4 7324 are both grounded.
In this embodiment, the external module 30 controls the on state of the fifth switch Q5, so as to implement low-side control of the circuit.
The embodiment of the application also provides the working equipment which comprises the output control circuit 100.
It should be noted that the working device in this embodiment may be any device that needs to perform power output control, including but not limited to an unmanned aerial vehicle.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An output control circuit, characterized in that the output control circuit comprises a main power supply, a switching element and a first control module;
the first control module comprises a first control unit and a first one-way conductive unit;
the positive electrode of the main power supply is connected with the positive electrode of a target load, the negative electrode of the main power supply is connected with the first conduction end of the switch element, the second conduction end of the switch element is connected with the negative electrode of the target load, and the control end of the switch element is connected with the output end of the first one-way conduction unit;
the input end of the first unidirectional conductive unit is connected with the first control unit.
2. The output control circuit of claim 1, wherein the first unidirectional conducting unit comprises a first diode, a cathode of the first diode is connected with the control terminal of the switching element, and an anode of the first diode is connected with the first control unit.
3. The output control circuit according to claim 1, wherein the first unidirectional conducting unit comprises a MOS transistor, the MOS transistor comprises a body diode, a cathode of the body diode is connected to the control terminal of the switching element, and an anode of the body diode is connected to the first control unit.
4. The output control circuit according to claim 1, wherein the first control unit comprises a first control power supply and a first switch tube, a first conducting terminal of the first switch tube is connected to an anode of the first control power supply, a second conducting terminal of the first switch tube is connected to the input terminal of the first unidirectional conducting unit, and a control terminal of the first switch tube is grounded.
5. The output control circuit according to claim 4, wherein the first control unit further comprises a second diode, an anode of the second diode is connected to the anode of the first control power supply, and a cathode of the second diode is connected to the first conducting terminal of the first switching tube.
6. The output control circuit of claim 1, further comprising a second control module, one end of the second control module being connected to the negative pole of the target load, the other end of the second control module being connected to ground.
7. The output control circuit according to claim 6, wherein the second control module comprises a second unidirectional conductive element and a second control element, one end of the second unidirectional conductive element is connected with the negative electrode of the target load, the other end of the second unidirectional conductive element is connected with the second control element, and the second control element is grounded.
8. The output control circuit according to claim 7, wherein the second control unit comprises a second control power supply and a second switch tube, a control end of the second switch tube is connected with an anode of the second control power supply, a first conducting end of the second switch tube is connected with the second unidirectional conducting unit, and a second conducting end of the second switch tube is grounded.
9. The output control circuit according to claim 8, wherein the second control unit further comprises a first resistor, one end of the first resistor is connected to the second unidirectional conducting unit, and the other end of the first resistor is connected to the first conducting end of the second switching tube.
10. A working apparatus characterized by comprising the output control circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221002193.0U CN217216529U (en) | 2022-04-26 | 2022-04-26 | Output control circuit and operation equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221002193.0U CN217216529U (en) | 2022-04-26 | 2022-04-26 | Output control circuit and operation equipment |
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| CN217216529U true CN217216529U (en) | 2022-08-16 |
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| CN202221002193.0U Active CN217216529U (en) | 2022-04-26 | 2022-04-26 | Output control circuit and operation equipment |
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