CN216975266U - Control circuit and control device - Google Patents
Control circuit and control device Download PDFInfo
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- CN216975266U CN216975266U CN202123136114.3U CN202123136114U CN216975266U CN 216975266 U CN216975266 U CN 216975266U CN 202123136114 U CN202123136114 U CN 202123136114U CN 216975266 U CN216975266 U CN 216975266U
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Abstract
The utility model discloses a control circuit and a control device, which are applied to an electromagnetic water pump and used for solving the problem that the electromagnetic coil generates interference impact on an electronic control element when the electromagnetic coil is powered off in the prior art, wherein the control circuit comprises: the device comprises a control unit, a power supply unit, an absorption unit, an electromagnetic coil and a switch unit; the control unit is connected with the control end of the switch unit, and the power supply unit, the switch unit and the electromagnetic coil are connected in series; the electromagnetic coil is connected with the absorption unit in parallel, and the switch unit is used for receiving a control signal of the control unit and switching on or off a passage between the power supply unit and the electromagnetic coil; when the switch unit is disconnected, the electromagnetic coil generates reverse induced electromotive force at the moment of power failure, and the absorption unit can absorb induced current generated by the induced electromotive force, so that interference impact on a control unit element by the induced current can be avoided, and the risk of damage to the control element can be reduced.
Description
Technical Field
The utility model relates to the technical field of electromagnetic water pumps, in particular to a control circuit and a control device.
Background
At present, most of conventional electromagnetic water pumps are driven by electromagnetic clutches, and the on-off of the electromagnetic water pumps is controlled by the on-off of the electromagnetic clutches. Because the electromagnetic clutch controls the pump to work and start and stop, when the electromagnetic coil in the electromagnetic clutch is powered off, reverse induced electromotive force can be generated, the current of the inductive load changes suddenly, and larger sudden change voltage can be generated at two ends of the inductor, so that larger interference impact can be generated on an electronic control element.
Disclosure of Invention
The utility model provides a control circuit which is used for solving the problem of interference impact on a control element when an electromagnetic coil is powered off in the prior art.
In a first aspect, an embodiment of the present invention provides a control circuit, which is applied to an electromagnetic water pump, and includes: the device comprises a control unit, a power supply unit, an absorption unit, an electromagnetic coil and a switch unit; the control unit is connected with the control end of the switch unit, and the power supply unit, the switch unit and the electromagnetic coil are connected in series; the electromagnetic coil is connected in parallel with the absorption unit;
the switch unit is used for receiving a control signal of the control unit and switching on or off a passage between the power supply unit and the electromagnetic coil;
the absorption unit is used for absorbing the induction current generated by the electromagnetic coil when the switch unit is switched off.
In one possible embodiment, the positive pole of the power supply unit is connected to the first end of the switch unit, and the negative pole of the power supply unit is connected to the first end of the electromagnetic coil;
the second end of the switch unit is connected with the second end of the electromagnetic coil.
The absorption unit is a freewheeling diode;
the anode of the freewheeling diode is connected with the cathode of the power supply unit, and the cathode of the freewheeling diode is connected with the anode of the power supply unit.
In one possible embodiment, the minimum on-current of the freewheeling diode is 10A.
In one possible implementation, the circuit further includes: an indicating unit for indicating whether the electromagnetic coil is in fault;
the indicating unit is connected in parallel with the switching unit.
In a possible embodiment, the indication unit comprises a light emitting diode;
and the anode of the light-emitting diode and the anode of the power supply unit are connected with the cathode of the light-emitting diode and the second end of the electromagnetic coil.
In a possible embodiment, the indicating unit further comprises a resistor;
the resistor is connected between the anode of the light emitting diode and the anode of the power supply unit.
In one possible embodiment, the electromagnetic water pump comprises a first water pump interface and a second water pump interface which are used for connecting the electromagnetic water pump;
the first water pump interface is arranged between the second end of the switch unit and the second end of the electromagnetic coil;
the second water pump interface is arranged between the first end of the electromagnetic coil and the negative electrode of the power supply unit.
In a possible embodiment, the first water pump interface is connected to a positive pole of the electromagnetic water pump, and the second water pump interface is connected to a negative pole of the electromagnetic water pump.
In one possible embodiment, the power supply unit is a 24V dc regulated power supply.
In a second aspect, an embodiment of the present invention provides a control device, which is applied to the electromagnetic water pump, and includes the control circuit according to any one of the first aspect.
The utility model has the following beneficial effects:
the utility model discloses a control circuit and a control device, which are applied to an electromagnetic water pump and used for solving the problem of interference impact on an electronic control element when an electromagnetic coil is powered off in the prior art, wherein the control circuit comprises: the device comprises a control unit, a power supply unit, an absorption unit, an electromagnetic coil and a switch unit; the control unit is connected with the control end of the switch unit, and the power supply unit, the switch unit and the electromagnetic coil are connected in series; the electromagnetic coil is connected with the absorption unit in parallel, and the switch unit is used for receiving a control signal of the control unit and switching on or off a passage between the power supply unit and the electromagnetic coil; when the switch unit is switched off, the absorption unit can absorb induced current, wherein the induced current is induced current generated by reverse induced electromotive force generated at the moment of power failure of the electromagnetic coil, and the absorption unit can absorb the induced current generated by the induced electromotive force, so that interference impact on the control unit caused by the induced current can be avoided, and the risk of damage to the control unit can be reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a control circuit of an electromagnetic water pump in the related art;
fig. 2 is a schematic structural view of an electromagnetic water pump in the related art;
fig. 3 is a schematic structural diagram of a control circuit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another control circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
At present, most of conventional electromagnetic water pumps are driven by electromagnetic clutches, and the start and stop of the electromagnetic water pumps are controlled by control circuits in the electromagnetic clutches. As shown in fig. 1, a schematic diagram of a control circuit of an electromagnetic water pump in the related art is shown, where the control circuit includes: the electromagnetic water pump control system comprises a direct-current power supply 101, a switch 102, an electromagnetic coil 103 and a control element 104, wherein the direct-current power supply 101, the switch 102 and the electromagnetic coil 103 are connected in series, the control element 104 is connected with a control end of the switch 102, when an engine runs, if the control element 104 judges that the electromagnetic water pump needs to work at full speed, the control element 104 outputs a control signal to enable the switch 102 to be disconnected, the current of the electromagnetic coil disappears, an electromagnetic clutch is combined, and the water pump works at full speed; when the engine runs, if the control element 104 judges that the electromagnetic water pump needs to work at a low speed, the control element 104 outputs a control signal to close the switch 102, the electromagnetic coil flows current, the electromagnetic clutch is separated, and the water pump works at a low speed;
when the electromagnetic coil 103 is powered off due to the control element 104 controlling the switch 102 to open, the electromagnetic coil 103 may generate a reverse induced electromotive force, so that the current flowing through the inductive load changes suddenly, a large sudden voltage is generated across the inductor, and a large interference impact is generated on the control element 104, which may damage the control element 104.
The Control element 104 may be an Electronic Control Unit (ECU).
As shown in fig. 2, a schematic structural diagram of an electromagnetic water pump in the related art is shown, the electromagnetic water pump includes: the pump body 301, the magnet 302, the attraction disc 303, the heat dissipation disc 304, the transmission disc 305, the belt pulley 306 and the electromagnetic clutch 307; an attraction disc 303 is arranged above the belt pulley 306, a magnet 302 is arranged above the attraction disc 303, a heat dissipation disc 304 is arranged above the magnet 302, the magnet 302 is connected with the pump body 301 through a transmission disc 305, and an electromagnetic clutch 307 is arranged below the magnet 302;
a conventional electromagnetic clutch includes: the electromagnetic coil, the iron core, the armature, the friction plate and the direct current stabilized voltage supply;
when the control unit controls the electromagnetic clutch to be electrified, the armature iron is attracted with the friction plate, the direction of the magnetic field of the electromagnetic clutch is opposite to that of the magnetic field of the magnet, and the magnetic force on the attraction disc and the heat dissipation disc transmit torque, so that the differential operation of the electromagnetic water pump is controlled;
when the control unit controls the electromagnetic clutch to be powered off, the armature is separated from the friction plate, no magnetic field is generated by the electromagnetic clutch, and the electromagnetic water pump works at full speed as a conventional mechanical water pump.
Based on the above problems, an embodiment of the present invention provides a control circuit to solve the problem of interference impact on a control element when an electromagnetic coil is powered off in the prior art.
The control circuit provided in the exemplary embodiment of the present application is described below with reference to the drawings in conjunction with the application scenarios described above, it should be noted that the above application scenarios are only shown for the convenience of understanding the spirit and principles of the present application, and the embodiments of the present application are not limited in this respect.
As shown in fig. 3, a schematic structural diagram of a control circuit provided in an embodiment of the present invention is a control circuit applied to an electromagnetic water pump, where the control circuit includes: a control unit 201, a power supply unit 202, an absorption unit 203, an electromagnetic coil 204, and a switch unit 205; the control unit 201 is connected with the control end of the switch unit 205, and the power supply unit 202, the switch unit 205 and the electromagnetic coil 204 are connected in series; the electromagnetic coil 204 is connected in parallel with the absorption unit 203;
a switching unit 205 for receiving a control signal of the control unit 201 and turning on or off a path between the power supply unit 202 and the electromagnetic coil 204;
and a absorbing unit 203 for absorbing the induced current generated from the electromagnetic coil 204 when the switching unit 205 is turned off.
The utility model discloses a control circuit, which is applied to an electromagnetic water pump, and comprises: the device comprises a control unit, a power supply unit, an absorption unit, an electromagnetic coil and a switch unit; the control unit is connected with the control end of the switch unit, and the power supply unit, the switch unit and the electromagnetic coil are connected in series; the electromagnetic coil is connected with the absorption unit in parallel, and the switch unit is used for receiving a control signal of the control unit and switching on or off a passage between the power supply unit and the electromagnetic coil; when the switch unit is disconnected, the electromagnetic coil is connected with the absorption unit in series, reverse induced electromotive force is generated at the moment when the electromagnetic coil is disconnected, and the absorption unit is used for absorbing the induced electromotive force to generate induced current. The absorption units are connected with the two ends of the electromagnetic coil in parallel and used for absorbing the induced current in the electromagnetic coil, so that the interference impact of the induced current on the control unit can be avoided, and the risk of damage to the control unit can be reduced.
The control unit, i.e., the control element, here may be an ECU.
In a specific implementation, the positive pole of the power supply unit 202 is connected to the first end of the switch unit, the negative pole of the power supply unit 202 is connected to the first end of the electromagnetic coil 204, and the second end of the switch unit 205 is connected to the second end of the electromagnetic coil 204.
Wherein, the power supply unit 202 may be a dc power supply, the switching unit 205 may be a switch, the control unit 201 may be an ECU, and the absorption unit 203 may include a freewheeling diode D1, as shown in fig. 4.
Specifically, the minimum on-current of the freewheeling diode D1 may be 10A; the dc power supply may be a 24V dc regulated power supply.
In an embodiment, as shown in fig. 4, a schematic structural diagram of another control circuit provided in an embodiment of the present invention is shown, where the control circuit further includes: an indication unit 401, a first water pump interface 402 and a second water pump interface 403;
the indicating unit 401 is connected in parallel with the switching unit 205 for indicating whether the electromagnetic coil 204 is malfunctioning;
the indication unit 401 may include a light emitting diode D2 and a protection resistor R, an anode of the light emitting diode D2 is connected to an anode of the power supply unit 202 through the protection resistor R, and a cathode of the light emitting diode D2 is connected to the second end of the electromagnetic coil 204;
in a specific implementation, when the control unit 201 controls the switch unit 205 to be closed, the electromagnetic water pump works normally, the switch unit 205 short-circuits the resistor R and the light emitting diode D2, and the light emitting diode D2 does not emit light, which represents that the electromagnetic coil 204 is normal; when the control unit 201 controls the switch unit 205 to be switched off, the electromagnetic water pump works normally, the light emitting diode D2, the protective resistor R and the electromagnetic coil 204 are connected in series, and the light emitting diode D2 emits light, which represents that the electromagnetic coil 204 is in a fault.
According to the embodiment of the utility model, the fault of the electromagnetic coil 204 can be found in time through the integrated indicating unit 401, and the maintenance is carried out, so that the whole vehicle is not influenced.
Referring to fig. 3, the first water pump interface 402 is disposed between the second end of the switch unit 205 and the second end of the electromagnetic coil 204, and the first water pump interface 402 is connected to the positive pole of the electromagnetic water pump;
the second water pump interface 403 is arranged between the first end of the electromagnetic coil 204 and the negative electrode of the power supply unit 202, and the second water pump interface 403 is connected with the negative electrode of the electromagnetic water pump;
the electromagnetic water pump is connected with the control circuit through the interfaces 402 and 403, namely, the electromagnetic water pump is connected with the electromagnetic coil 204 in parallel, the running state of the electromagnetic water pump can be controlled through the control circuit, and the automatic control of the system is improved.
Based on the same inventive concept, embodiments of the present invention further provide a control device, and since the principle of the control device for solving the problem is similar to that of the control circuit, the implementation of the control device may refer to the implementation of the control circuit, and repeated details are not repeated.
The utility model discloses a control circuit and a control device, which are applied to an electromagnetic water pump and used for solving the problem of interference impact on an electronic control element when an electromagnetic coil is powered off in the prior art, wherein the control circuit comprises: the device comprises a control unit, a power supply unit, an absorption unit, an electromagnetic coil and a switch unit; the control unit is connected with the control end of the switch unit, and the power supply unit, the switch unit and the electromagnetic coil are connected in series; the electromagnetic coil is connected with the absorption unit in parallel, and the switch unit is used for receiving a control signal of the control unit and switching on or off a passage between the power supply unit and the electromagnetic coil; when the switch unit is disconnected, the absorption unit can absorb induced current generated by reverse induced electromotive force generated at the moment when the electromagnetic coil is powered off, and the absorption unit can absorb the induced current generated by the reverse induced electromotive force, so that the induced current can be prevented from generating interference impact on the control unit, and the risk of damaging the control unit is reduced; in addition, the two ends of the switch unit are also connected with the indicating units in parallel, when the control unit controls the switch unit to be closed, the electromagnetic water pump works normally, the switch unit short-circuits the indicating units, the indicating units do not emit light, the indicating unit represents that the electromagnetic coil is normal, when the control unit controls the switch unit to be disconnected, the electromagnetic water pump works normally, the indicating units are connected with the electromagnetic coil in series, the indicating units emit light, and the indicating unit represents that the electromagnetic coil is in fault. According to the embodiment of the utility model, the fault of the electromagnetic coil can be found in time through the integrated indicating unit, and the maintenance is carried out, so that the whole vehicle is not influenced.
Various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The utility model provides a control circuit, is applied to electromagnetic water pump which characterized in that includes: the device comprises a control unit, a power supply unit, an absorption unit, an electromagnetic coil and a switch unit; the control unit is connected with the control end of the switch unit, and the power supply unit, the switch unit and the electromagnetic coil are connected in series; the electromagnetic coil is connected in parallel with the absorption unit;
the switch unit is used for receiving a control signal of the control unit and switching on or off a passage between the power supply unit and the electromagnetic coil;
the absorption unit is used for absorbing the induction current generated by the electromagnetic coil when the switch unit is switched off.
2. The circuit of claim 1, wherein an anode of the power supply unit is connected to a first end of the switching unit, and a cathode of the power supply unit is connected to a first end of the electromagnetic coil;
the second end of the switch unit is connected with the second end of the electromagnetic coil;
the absorption unit is a freewheeling diode;
the anode of the freewheeling diode is connected with the cathode of the power supply unit, and the cathode of the freewheeling diode is connected with the anode of the power supply unit.
3. The circuit of claim 2, wherein the freewheeling diode has a minimum conduction current of 10A.
4. The circuit of claim 2, further comprising: an indicating unit for indicating whether the electromagnetic coil is in fault;
the indicating unit is connected in parallel with the switching unit.
5. The circuit of claim 4, wherein the indication unit comprises a light emitting diode;
and the anode of the light-emitting diode and the anode of the power supply unit are connected with the cathode of the light-emitting diode and the second end of the electromagnetic coil.
6. The circuit of claim 5, wherein the indication unit further comprises a resistor;
the resistor is connected between the anode of the light emitting diode and the anode of the power supply unit.
7. The circuit of claim 1, comprising a first water pump interface and a second water pump interface for connecting an electromagnetic water pump;
the first water pump interface is arranged between the second end of the switch unit and the second end of the electromagnetic coil;
the second water pump interface is arranged between the first end of the electromagnetic coil and the negative electrode of the power supply unit.
8. The circuit of claim 7, wherein the first water pump interface is connected to a positive pole of the electromagnetic water pump and the second water pump interface is connected to a negative pole of the electromagnetic water pump.
9. The circuit of any one of claims 1-8, wherein the power supply unit is a 24V dc regulated power supply.
10. A control device applied to an electromagnetic water pump is characterized by comprising the control circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123136114.3U CN216975266U (en) | 2021-12-13 | 2021-12-13 | Control circuit and control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123136114.3U CN216975266U (en) | 2021-12-13 | 2021-12-13 | Control circuit and control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216975266U true CN216975266U (en) | 2022-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123136114.3U Active CN216975266U (en) | 2021-12-13 | 2021-12-13 | Control circuit and control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216975266U (en) |
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2021
- 2021-12-13 CN CN202123136114.3U patent/CN216975266U/en active Active
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