CN210958120U - Drive circuit and control system - Google Patents
Drive circuit and control system Download PDFInfo
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- CN210958120U CN210958120U CN201921862650.1U CN201921862650U CN210958120U CN 210958120 U CN210958120 U CN 210958120U CN 201921862650 U CN201921862650 U CN 201921862650U CN 210958120 U CN210958120 U CN 210958120U
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Abstract
The utility model is suitable for a drive technical field provides a drive circuit and control system, including relay module, first drive module, second drive module and partial pressure module; the first driving module is used for conducting when receiving a first control signal sent by an external controller and sending the first driving signal to the relay module; the second driving module is used for conducting when receiving a second control signal sent by the external controller and sending a second driving signal to the relay module through the voltage division module; the relay module is used for keeping the on state at a first preset voltage when receiving a first driving signal and keeping the on state at a second preset voltage when receiving a second driving signal; and the voltage division module is used for dividing the voltage of the external power supply when the second driving module is switched on and the relay module is switched on, so that the relay module keeps the switching-on state by using a second preset voltage. The utility model discloses can practice thrift the cost.
Description
Technical Field
The utility model belongs to the technical field of the drive, especially, relate to drive circuit and control system.
Background
The drive circuit can be applied to many fields, for example, can be applied to photovoltaic contravariant field, fill electric pile field etc. and fill electric pile field, can be applied to the switch module that fills electric pile, the module of charging etc..
In the prior art, the drive circuit realizes the on-off of the whole circuit through the contactor, but the cost of the contactor is high, so that the whole cost of the drive circuit is high.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a drive circuit and control system to because the contactor cost is higher among the solution prior art, lead to the higher problem of drive circuit overall cost.
The embodiment of the utility model provides a first aspect provides a drive circuit, including relay module, first drive module, second drive module and partial pressure module;
the input end of the first driving module is connected with an external controller, and the output end of the first driving module is connected with the first end of the relay module, and the first driving module is used for conducting when receiving a first control signal sent by the external controller and sending a first driving signal for enabling the relay module to be conducted to the relay module;
the input end of the second driving module is connected with the external controller, the output end of the second driving module is connected with the first end of the relay module through the voltage dividing module, and the second driving module is used for conducting when receiving a second control signal sent by the external controller and sending a second driving signal for enabling the relay module to be conducted to the relay module through the voltage dividing module;
the second end of the relay module is connected with an external power supply and is used for keeping the on state at a first preset voltage when receiving the first driving signal and keeping the on state at a second preset voltage when receiving the second driving signal;
the voltage division module is used for dividing the voltage of the external power supply when the second driving module is switched on and the relay module is switched on, so that the relay module keeps a switching-on state at the second preset voltage.
Optionally, the relay module comprises a relay and a zener diode;
the first end of the relay is connected with the first end of the relay module, and the second end of the relay is connected with the second end of the relay module;
and the anode of the voltage stabilizing diode is connected with the first end of the relay, and the cathode of the voltage stabilizing diode is connected with the second end of the relay.
Optionally, the relay module further comprises a diode;
and the anode of the diode is connected with the first end of the relay, and the cathode of the diode is connected with the second end of the relay.
Optionally, the relay is an ac relay.
Optionally, the first driving module includes a first triode, a first resistor, and a capacitor;
the base of the first triode is connected with the input end of the first driving module, the first end of the first resistor and the first end of the capacitor respectively, the collector of the first triode is connected with the output end of the first driving module, the emitter of the first triode is connected with the second end of the first resistor and the second end of the capacitor respectively, and the emitter of the first triode is connected with zero potential.
Optionally, the first driving module further comprises a second resistor;
and the base electrode of the first triode is connected with the input end of the first driving module through the second resistor.
Optionally, the second driving module includes a second transistor and a third resistor;
and a base of the second triode is respectively connected with the input end of the second driving module and the first end of the third resistor, a collector of the second triode is connected with the output end of the second driving module, an emitter of the second triode is connected with the second end of the third resistor, and the emitter of the second triode is connected with zero potential.
Optionally, the second driving module further comprises a fourth resistor;
and the base electrode of the second triode is connected with the input end of the second driving module through the fourth resistor.
Optionally, the voltage dividing module includes a fifth resistor.
A second aspect of the embodiments of the present invention provides a control system, comprising a controller and any one of the driving circuits provided by the first aspect of the embodiments connected to the controller.
Compared with the prior art, the embodiment of the utility model beneficial effect who exists is: the relay module is connected with the external controller, and is used for receiving a first control signal sent by the external controller; the second drive module switches on when receiving the second control signal that external control ware sent, then sends the second drive signal to the relay module through the voltage division module, and the relay module carries out the voltage division to external power source through the voltage division module according to the second drive signal to the second presets voltage and keeps the state of opening, the embodiment of the utility model provides an use the relay module to replace the contactor, can practice thrift the cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions 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 without inventive labor.
Fig. 1 is a schematic structural diagram of a driving circuit provided in an embodiment of the present invention;
fig. 2 is a specific circuit diagram of a driving circuit according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical solution of the present invention, the following description is made by using specific examples.
Referring to fig. 1, the driving circuit provided in the embodiment of the present invention includes a relay module 100, a first driving module 200, a second driving module 300, and a voltage dividing module 400;
the first driving module 200 has an input end connected to the external controller and an output end connected to the first end of the relay module 100, and is configured to be turned on when receiving a first control signal sent by the external controller, and send a first driving signal for turning on the relay module 100 to the relay module 100;
the second driving module 300, an input end of which is connected to the external controller, and an output end of which is connected to the first end of the relay module 100 through the voltage dividing module 400, is configured to be turned on when receiving a second control signal sent by the external controller, and sends a second driving signal for turning on the relay module 100 to the relay module 100 through the voltage dividing module 400;
a second terminal of the relay module 100 is connected to an external power source, and is configured to maintain an on state at a first preset voltage when receiving a first driving signal, and maintain an on state at a second preset voltage when receiving a second driving signal;
the voltage dividing module 400 is configured to divide the voltage of the external power source when the second driving module 300 is turned on and the relay module 100 is turned on, so that the relay module 100 maintains an on state at a second preset voltage.
In a specific application, the driving circuit is connected to an external controller, for example, the external controller may be a single chip microcomputer that sends a control signal. The external controller may control the on or off state of the driving circuit by sending different signals to the driving circuit.
The first driving module 200 is turned on when receiving a first control signal sent by an external controller, and sends the first driving signal to the relay module 100, the relay module 100 is turned on when receiving the first driving signal, at this time, an external power supply provides a first preset voltage to the relay module 100, and the relay module 100 maintains the on state at the first preset voltage. The first control signal may be a high level signal.
The second driving module 300 is turned on when receiving a second control signal sent by the external controller, and sends the second driving signal to the relay module 100 through the voltage dividing module 400, and the relay is turned on when receiving the second driving signal, at this time, the external power supply still provides the first preset voltage, but the voltage dividing module 400 divides the first preset voltage provided by the external power supply, so that the relay module 100 maintains the on-state with the second preset voltage. The second control signal may be a high level signal.
The first driving module 200 or the second driving module 300 maintains the off state when receiving the third control signal transmitted from the external controller. The third control signal may be a low level signal.
When the whole driving circuit needs to be kept in the off state, the external controller simultaneously sends a third control signal to the first driving module 200 and the second driving module 300. Since the relay module 100 requires that the driving voltage transient state is 12V driving, and needs to be switched to 7.2V holding voltage after 200ms, when the whole driving circuit needs to maintain the on-state, the external controller first sends a first control signal to the first driving module 200, and simultaneously sends a third control signal to the second driving module 300, so that the relay module 100 is turned on at a first preset voltage; after the preset time elapses, the external controller transmits a second control signal to the second driving module 300 while transmitting a third control signal to the first driving module 200, so that the relay module 100 maintains a turn-on state at a second preset voltage. The first preset voltage may be 12V, the second preset voltage may be 7.2V, and the preset time may be 200 ms.
As can be seen from the above description, the first driving module 200 is turned on when receiving the first control signal sent by the external controller, and then sends the first driving signal to the relay module 100, and the relay module 100 maintains the on state at the first preset voltage according to the first driving signal; second drive module 300 switches on when receiving the second control signal that external control ware sent, then sends second drive signal to relay module 100 through voltage division module 400, and relay module 100 carries out the voltage division to external power source through voltage division module 400 according to second drive signal to the second is predetermine voltage and is kept the open mode, the utility model discloses an use relay module 100 to replace the contactor, can practice thrift the cost.
In one embodiment of the present invention, referring to fig. 2, the relay module 100 includes a relay K and a zener diode Z1;
a relay K having a first end connected to the first end of the relay module 100 and a second end connected to the second end of the relay module 100;
and the anode of the voltage stabilizing diode Z1 is connected with the first end of the relay K, and the cathode of the voltage stabilizing diode Z1 is connected with the second end of the relay K.
In one embodiment of the present invention, referring to fig. 2, the relay module 100 further includes a diode D1;
and the anode of the diode D1 is connected with the first end of the relay, and the cathode of the diode D1 is connected with the second end of the relay.
In one embodiment of the present invention, the relay is an ac relay.
In an embodiment of the present invention, referring to fig. 2, the first driving module 200 includes a first transistor Q1, a first resistor R1, and a capacitor C1;
a base of the first transistor Q1 is connected to the input terminal of the first driving module 200, the first terminal of the first resistor R1, and the first terminal of the capacitor C1, respectively, a collector is connected to the output terminal of the first driving module 200, an emitter is connected to the second terminal of the first resistor R1 and the second terminal of the capacitor C1, respectively, and the emitter is connected to zero potential.
In an embodiment of the present invention, referring to fig. 2, the first driving module 200 further includes a second resistor R2;
the base of the first transistor Q1 is connected to the input terminal of the first driving module 200 through a second resistor R2.
The second resistor R2 can prevent the first driving module 200 from being over-voltage when receiving the signal sent by the external controller, thereby protecting the first transistor Q1.
In an embodiment of the present invention, referring to fig. 2, the second driving module 300 includes a second transistor Q2 and a third resistor R3;
and a base of the second triode Q2 is connected with the input end of the second driving module 300 and the first end of the third resistor R3, respectively, a collector is connected with the output end of the second driving module 300, an emitter is connected with the second end of the third resistor R3, and the emitter is connected with zero potential.
In an embodiment of the present invention, referring to fig. 2, the second driving module 300 further includes a fourth resistor R4;
the base of the second transistor Q2 is connected to the input terminal of the second driving module 300 through a fourth resistor R4.
The fourth resistor R4 can prevent the second driving module 300 from being over-voltage when receiving the signal sent by the external controller, thereby protecting the second transistor Q2.
In one embodiment of the present invention, referring to fig. 2, the voltage dividing module 400 includes a fifth resistor R5.
A first terminal of the fifth resistor R5 is connected to the output terminal of the second driver module 300, and a second terminal of the fifth resistor R5 is connected to the first terminal of the relay module 100. The fifth resistor R5 acts as a voltage divider in the circuit.
The following describes the operation of the above-mentioned driving circuit in detail with reference to fig. 2:
the external controller may transmit different control signals to the driving circuit, thereby controlling the on or off state of the driving circuit. The control signal may include a first control signal, a second control signal, and a third control signal, and the first control signal and the second control signal may be high-level signals, and the third control signal may be a low-level signal.
When the external controller sends all low level signals to the driving circuit, the driving circuit keeps an off state.
When the external controller sends the first control signal to the first driving module 200 and simultaneously sends the third control signal to the second driving module 300 (or sends the second control signal to the second driving module), the first transistor Q1 in the first driving module 200 is turned on, the second transistor Q2 in the second driving module 300 is not turned on, the external power supply provides 12V voltage for the relay in the relay module 100, and the relay is turned on.
When the external controller sends the second control signal to the second driving module 300 and simultaneously sends the third control signal to the first driving module 200, the second transistor Q2 in the second driving module 300 is turned on, the first transistor Q1 in the first driving module 200 is turned off, and the fifth resistor R5 in the voltage dividing module 400 divides the 12V voltage provided by the external power source, so that the relay in the relay module 100 maintains the on state with the voltage of 7.2V.
The embodiment of the utility model provides a control system is still provided, including the controller with be connected with the controller like any kind of drive circuit that provides in the embodiment above, also have any kind of above-mentioned drive circuit's beneficial effect. Wherein, the controller is the external controller.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A driving circuit is characterized by comprising a relay module, a first driving module, a second driving module and a voltage division module;
the input end of the first driving module is connected with an external controller, and the output end of the first driving module is connected with the first end of the relay module, and the first driving module is used for conducting when receiving a first control signal sent by the external controller and sending a first driving signal for enabling the relay module to be conducted to the relay module;
the input end of the second driving module is connected with the external controller, the output end of the second driving module is connected with the first end of the relay module through the voltage dividing module, and the second driving module is used for conducting when receiving a second control signal sent by the external controller and sending a second driving signal for enabling the relay module to be conducted to the relay module through the voltage dividing module;
the second end of the relay module is connected with an external power supply and is used for keeping the on state at a first preset voltage when receiving the first driving signal and keeping the on state at a second preset voltage when receiving the second driving signal;
the voltage division module is used for dividing the voltage of the external power supply when the second driving module is switched on and the relay module is switched on, so that the relay module keeps a switching-on state at the second preset voltage.
2. The drive circuit of claim 1, wherein the relay module comprises a relay and a zener diode;
the first end of the relay is connected with the first end of the relay module, and the second end of the relay is connected with the second end of the relay module;
and the anode of the voltage stabilizing diode is connected with the first end of the relay, and the cathode of the voltage stabilizing diode is connected with the second end of the relay.
3. The drive circuit of claim 2, wherein the relay module further comprises a diode;
and the anode of the diode is connected with the first end of the relay, and the cathode of the diode is connected with the second end of the relay.
4. The drive circuit of claim 2, wherein the relay is an ac relay.
5. The driving circuit of claim 1, wherein the first driving module comprises a first transistor, a first resistor, and a capacitor;
the base of the first triode is connected with the input end of the first driving module, the first end of the first resistor and the first end of the capacitor respectively, the collector of the first triode is connected with the output end of the first driving module, the emitter of the first triode is connected with the second end of the first resistor and the second end of the capacitor respectively, and the emitter of the first triode is connected with zero potential.
6. The driving circuit of claim 5, wherein the first driving module further comprises a second resistor;
and the base electrode of the first triode is connected with the input end of the first driving module through the second resistor.
7. The driving circuit of claim 1, wherein the second driving module comprises a second transistor and a third resistor;
and a base of the second triode is respectively connected with the input end of the second driving module and the first end of the third resistor, a collector of the second triode is connected with the output end of the second driving module, an emitter of the second triode is connected with the second end of the third resistor, and the emitter of the second triode is connected with zero potential.
8. The driving circuit of claim 7, wherein the second driving module further comprises a fourth resistor;
and the base electrode of the second triode is connected with the input end of the second driving module through the fourth resistor.
9. The driving circuit according to any one of claims 1 to 8, wherein the voltage dividing module comprises a fifth resistor.
10. A control system comprising a controller and a drive circuit as claimed in any one of claims 1 to 9 connected to the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921862650.1U CN210958120U (en) | 2019-10-31 | 2019-10-31 | Drive circuit and control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921862650.1U CN210958120U (en) | 2019-10-31 | 2019-10-31 | Drive circuit and control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210958120U true CN210958120U (en) | 2020-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921862650.1U Active CN210958120U (en) | 2019-10-31 | 2019-10-31 | Drive circuit and control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210958120U (en) |
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2019
- 2019-10-31 CN CN201921862650.1U patent/CN210958120U/en active Active
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Effective date of registration: 20210128 Address after: 518000 room 118, 1 Kang Hesheng building, 1 Chuang Sheng Road, Xili street, Nanshan District, Shenzhen, Guangdong. Patentee after: SHENZHEN KEHUA TECHNOLOGY Co.,Ltd. Address before: 361101 Ma Long Road 457, Torch Garden, Xiamen Torch High-tech Zone, Fujian Province Patentee before: XIAMEN KEHUAHENGSHENG LIMITED BY SHARE Ltd. Patentee before: SHENZHEN KEHUA TECHNOLOGY Co.,Ltd. |