CN217562478U - Relay drive circuit and energy storage power supply - Google Patents
Relay drive circuit and energy storage power supply Download PDFInfo
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- CN217562478U CN217562478U CN202221671232.6U CN202221671232U CN217562478U CN 217562478 U CN217562478 U CN 217562478U CN 202221671232 U CN202221671232 U CN 202221671232U CN 217562478 U CN217562478 U CN 217562478U
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Abstract
The utility model relates to a relay technical field especially relates to a relay drive circuit and energy storage power supply. The relay driving circuit comprises a first power supply module, a second power supply module and a driving control module, wherein the first power supply module is connected with a first end of a coil of a first power supply and a relay, the first power supply module is also connected with a second end of the coil of the relay, the second power supply module is connected with a first end of a coil of a second power supply and the relay, a control end of the driving control module receives a driving signal, the first end of the driving control module is connected with a second end of the coil of the relay, and the second end of the driving control module is grounded. The drive control module controls the first power supply and the second power supply to supply power to the coil of the relay based on the drive signal, when the relay is conducted for a period of time, the power supply loop of the first power supply can be automatically cut off, and only the second power supply maintains the contact attraction of the relay, so that the power loss of the coil heating is reduced, and the service life and the reliability of the relay are improved.
Description
Technical Field
The utility model relates to a relay technical field especially relates to a relay drive circuit and energy storage power supply.
Background
The control power supply used by the relay control side (the circuit of the coil part of the relay) is mostly supplied with power for a low-voltage power supply, the relay needs to carry out pull-in action for rated voltage in use, and when the relay is pulled in, the relay needs to be powered on all the time to keep a pull-in state. If after the relay is attracted, the coil of the relay uses the original attraction power supply voltage to continuously supply power, so that the coil of the relay generates heat seriously, the temperature rise is very high, the service life of the relay is influenced, and the energy consumption is increased. The double power supply in the prior art cannot achieve the effect of automatic disconnection of the attraction power supply, the power loss of the coil is large, if a multi-path relay is needed in a circuit, the power supply is required to have higher driving power, the design cost is high, and the power loss is high.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a relay drive circuit and energy storage power supply can improve the technical problem that the power loss of relay among the correlation technique is high.
The embodiment of the utility model provides a for improving above-mentioned technical problem provide following technical scheme:
in a first aspect, an embodiment of the present invention provides a relay driving circuit, which includes:
the first end of the first power supply module is used for being connected with a first power supply, the second end of the first power supply module is connected with the first end of the coil of the relay, and the third end of the first power supply module is connected with the second end of the coil of the relay;
a first end of the second power supply module is used for being connected with a second power supply, a second end of the second power supply module is connected with a first end of a coil of the relay, and the power supply voltage of the second power supply is smaller than that of the first power supply;
a control end of the drive control module is used for receiving a drive signal, a first end of the drive control module is connected with a third end of the first power supply module, a second end of the drive control module is grounded, and the drive control module is used for controlling the first power supply and the second power supply to supply power to a coil of the relay based on the drive signal;
the first power supply module comprises a time delay unit and a switch tube Q2, the first end of the switch tube Q2 is connected with the first power supply, the second end of the switch tube Q2 is connected with the first end of the coil of the relay, the control end of the switch tube Q2 is connected with the second end of the time delay unit, the first end of the time delay unit is used for being connected with the first power supply, the third end of the time delay unit is grounded, the time delay unit is used for delaying to preset time control after the drive control module receives a drive signal, and the switch tube Q2 is disconnected, so that the first power supply stops supplying power to the coil of the relay.
Optionally, the delay unit includes a voltage divider subunit, a switch tube Q1, a resistor R3, a resistor R4, and a capacitor C1, where a first end of the voltage divider subunit is connected to the first power supply, a second end of the voltage divider subunit is connected to the first end of the driving control module, a third end of the voltage divider subunit is connected to the control end of the switch tube Q1, the first end of the switch tube Q1 is used to connect to the first power supply, a second end of the switch tube Q1 is connected to the first end of the capacitor C1 through the resistor R3, the second end of the switch tube Q1 is grounded through the resistor R4, and a second end of the capacitor C1 is grounded;
the switch tube Q1 is used for being conducted after the drive control module receives a drive signal to charge the capacitor C1, and when the voltage of the capacitor C1 reaches the disconnection voltage value of the switch tube Q2, the time delay unit controls the switch tube Q2 to be disconnected, so that the first power supply stops supplying power to the coil of the relay.
Optionally, the voltage divider subunit includes a resistor R1 and a resistor R2 connected in series, the two ends of the resistor R1 are connected to the first power supply and the control end of the switch tube Q1, and the two ends of the resistor R2 are connected to the control end of the switch tube Q1 and the first end of the driving control module, respectively.
Optionally, the switching tube Q2 is a PNP type triode.
Optionally, the second power supply module is a diode D1, a cathode of the diode D1 is connected to the first end of the coil of the relay, and an anode of the diode D1 is connected to the second power supply.
Optionally, the driving control module includes a switch tube Q1 and a resistor R5, a first end of the switch tube Q1 is connected to the third end of the first power supply module, a second end of the switch tube Q1 is grounded, and a control end of the switch tube Q1 is configured to receive the driving signal through the resistor R5.
Optionally, the switching tube Q3 is an NPN-type triode.
Optionally, the relay driving circuit is further provided with a coil follow current module, a first end of the coil follow current module is connected to a first end of a coil of the relay, a second end of the coil follow current module is connected to a second end of the coil of the relay, and the coil follow current module is configured to provide a follow current loop when the coil of the relay is powered off, so that the contact of the relay is turned off.
Optionally, the coil freewheeling module is a TVS diode, and the TVS diode is connected in parallel to the coil of the relay.
In a second aspect, an embodiment of the present invention provides an energy storage power supply, which includes the relay driving circuit as described above, and a relay electrically connected to the relay driving circuit.
Be different from prior art, the embodiment of the utility model provides a relay drive circuit and energy storage power supply. The relay driving circuit comprises a first power supply module, a second power supply module and a driving control module, wherein the first power supply module is connected with a first end of a coil of a first power supply and a relay, the first power supply module is also connected with a second end of the coil of the relay, the second power supply module is connected with a first end of a coil of a second power supply and the relay, a control end of the driving control module receives a driving signal, the first end of the driving control module is connected with a second end of the coil of the relay, and the second end of the driving control module is grounded. The drive control module controls the first power supply and the second power supply to supply power to the coil of the relay based on the drive signal, when the relay is conducted for a period of time, the power supply loop of the first power supply can be automatically cut off, and only the second power supply maintains the contact attraction of the relay, so that the power loss of the coil heating is reduced, the heating amount of the coil is reduced, and the service life and the reliability of the relay are improved.
Drawings
Fig. 1 is a schematic structural diagram of an energy storage power supply provided in an embodiment of the present invention;
fig. 2a is a schematic structural diagram based on module division in a relay driving circuit according to an embodiment of the present invention;
fig. 2b is a schematic structural diagram based on unit division in a relay driving circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a relay driving circuit according to another embodiment of the present invention.
Detailed Description
To facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, an embodiment of the present invention provides an energy storage power supply, including a relay driving circuit 10 and a relay 20 electrically connected to the relay driving circuit 10, where the energy storage power supply supplies power to the relay driving circuit 10 through a first power supply 30 and/or a second power supply 40, so that the relay driving circuit 10 controls on and off of the relay 20.
As shown in fig. 1, the relay driving circuit 10 includes a first power supply module 11, a second power supply module 12, and a driving control module 13. When the driving control module 13 receives the driving signal, the first power supply module 11 is connected to the second power supply module 12, and the first power supply 30 and the second power supply 40 supply power to the coil of the relay 20, so that the contacts of the relay are closed and the relay is connected. The power supply voltage of the first power supply 30 is different from the power supply voltage of the second power supply 40, and the power supply voltage of the second power supply is usually smaller than the power supply voltage of the first power supply. The first power supply module 11 includes a delay unit 111 and a switching tube Q2, and after the driving control module receives a driving signal, the relay 20 is turned on; after the relay is turned on, the delay unit 111 delays for a preset time and then controls the switching tube Q2 to be turned off, so that the first power supply 30 stops supplying power, and then only the second power supply 40 supplies power to the coil of the relay 20 until the driving control module 13 is turned off.
The embodiment of the utility model provides an energy storage power supply can be when receiving drive signal, control drive module switches on, form power supply loop, so that first power and second power are the coil power supply of relay, control relay closed work, and the supply voltage of second power is less than the supply voltage of first power, can the power supply loop of automatic cutout first power after the relay switches on a period, only maintain the contact actuation of relay by the second power, the power loss that the degree of generating heat and the coil that has reduced the coil and generate heat and bring.
Referring to fig. 2a, an embodiment of the present invention provides a relay driving circuit, which includes a first power supply module 11, a second power supply module 12, and a driving control module 13.
Specifically, a first end of the first power supply module 11 is connected to a first power supply, VCC1 in the figure represents the first power supply, a second end of the first power supply module 11 is connected to a first end of a coil of a relay, a third end of the first power supply module 11 is connected to a second end of the coil of the relay, RLY1 in the figure represents the relay, where RLY1_1 pin and RLY1_2 pin of the relay are respectively a first end and a second end of the coil of the relay, and RLY1_3 pin, RLY1_4 pin and RLY1_5 pin of the relay are contacts of the relay.
A first end of the second power supply module 12 is connected to a second power supply, wherein VCC2 is used to represent the second power supply, and a second end of the second power supply module 12 is connected to a first end of a coil of the relay, that is, the RLY1_1 pin of the relay. The supply voltage provided by the second power supply may be 1/2 of the supply voltage provided by the first power supply, for example, the first power supply provides a 24V supply voltage, the second power supply provides a 12V supply voltage, or the first power supply provides a 12V supply voltage, the second power supply provides a 6V supply voltage, etc. Specifically, the first power supply is a driving power supply, and the second power supply is a maintaining power supply, that is, the power supply voltage of the first power supply can drive the relay to close, and the power supply voltage of the second power supply can maintain the relay to close.
The control end of the driving control module 13 is configured to receive a driving signal, the driving signal may be provided by a single chip, a driving rly1 is used to represent the driving signal in the drawing, the first end of the driving control module 13 is connected to the third end of the first power supply module 11, and the second end of the driving control module 13 is grounded. The driving control module 13 may control the first power VCC1 and the second power VCC2 to supply power to the coil of the relay based on the driving signal.
Please combine fig. 2b, the first power supply module includes a delay unit 111 and a switch tube Q2, a first end of the switch tube Q2 is connected to the first power VCC1, a second end of the switch tube Q2 is connected to a first end of a coil of the relay, that is, an RLY1_1 pin, a control end of the switch tube Q2 is connected to a second end of the delay unit 111, a first end of the delay unit 111 is connected to the first power VCC1, and a third end of the delay unit 111 is grounded, that is, a GND terminal in the drawing. The delay unit 111 may control the switching tube Q2 to be turned off after a preset condition is met, so that the first power supply module 11 stops supplying power to the coil of the relay.
Specifically, delay unit 111 includes partial pressure subunit, switch tube Q1, resistance R3, resistance R4 and electric capacity C1, the first end of partial pressure subunit is connected first power VCC1, the second end of partial pressure subunit is connected the first end of drive control module 13, the third end connection of partial pressure subunit the control end of switch tube Q1, the first end connection of switch tube Q1 first power VCC1, the second end of switch tube Q1 passes through resistance R3 connects electric capacity C1's first end, switch tube Q1's second end passes through resistance R4 ground connection, electric capacity C1's second end ground connection, electric capacity C1's first end is connected switch tube Q2's control end.
Wherein, the voltage-dividing subunit includes series connection's resistance R1 and resistance R2, resistance R1's both ends are connected respectively first power VCC1 with switch tube Q1's control end, resistance R2's both ends are connected respectively switch tube Q1's control end with drive control module 13's first end.
Specifically, after the driving control module 13 receives the driving signal, the switch tube Q1 is turned on, the VCC1 charges the capacitor C1 through the switch tube Q1 and the resistor R3, and when the voltage of the capacitor C1 reaches the disconnection voltage value of the switch tube Q2, the switch tube Q2 is controlled to be disconnected, so that the first power supply module 11 stops supplying power to the coil of the relay. The switching tube Q2 is a PNP triode, the fact that the voltage of the capacitor C1 reaches the disconnection voltage value of the switching tube Q2 means that the voltage of the first end of the capacitor C1 is increased to the base threshold voltage of the switching tube Q2, when the control end voltage of the switching tube Q2 (namely, the voltage of the first end of the capacitor C1) reaches the base threshold value, the switching tube Q2 is disconnected, the power supply circuit of the first power supply VCC1 is disconnected, the first power supply VCC1 stops supplying power to the coil of the relay, and at the moment, the coil of the relay is supplied power only by the second power supply VCC2, so that the attraction of the relay contacts is maintained.
The driving control module 13 includes a switch tube Q3 and a resistor R5, the first end of the switch tube Q1 is connected to the third end of the first power supply module, that is, the first end of the switch tube Q1 is connected to the control end of the switch tube Q1 through the resistor R2, the second end of the switch tube Q1 is grounded, and the control end of the switch tube Q1 can receive the driving signal through the resistor R5.
Optionally, the switching tube Q3 is an NPN-type triode.
Specifically, when the DriveRLY1 has no driving signal, the switching tube Q3 is turned off, and since the switching tube Q2 is a PNP triode, the control end voltage (i.e., pin Q2_1 in the figure) of the switching tube Q2 is pulled down by the resistor R3 and the resistor R4, at this time, the switching tube Q2 is in a conducting state, although the switching tube Q2 is in the conducting state, the switching tube Q3 is in a turned-off state, the first power source VCC1 does not form a power supply loop, the coil of the relay RLY1 loses power, and the relay RLY1 is in a turned-off state.
When the driveRLY1 is driven to be at a high level, the switch tube Q3 is conducted, at the moment, the power supply current of the first power supply VCC1 forms a power supply loop through the switch tube Q2 and the switch tube Q3, the power supply VCC1 supplies power to the coil of the relay RLY1 through the switch tube Q2, and the contact of the relay RLY1 is attracted; meanwhile, after the switching tube Q3 is turned on, the voltage of the control end (pin Q1_1 in the figure) of the switching tube Q1 is pulled low, the switching tube Q1 is turned on, the first power supply VCC1 charges the capacitor C1 through the switching tube Q1 and the resistor R3, the voltage of the first end of the capacitor C1 gradually rises, when the voltage of the capacitor C1 rises to the base threshold value of the switching tube Q2, the switching tube Q2 is turned off, and the power supply loop corresponding to the first power supply VCC1 is turned off; in the process, the power supply loop where the second power source VCC2 is located is continuously conducted, and when the VCC1 stops supplying power, the VCC2 provides the voltage for the relay to maintain pull-in.
The embodiment of the utility model provides a relay drive circuit uses first power VCC1 and second power VCC2 as the feeder ear, accomplishes the switching of two way power supply after the relay actuation through the delay unit, with VCC1 provides the actuation voltage of relay, with VCC2 provides the holding voltage of relay, through the coil voltage that reduces the relay, reduce calorific capacity of coil, reach the effect that reduces power loss, and improved the life and the reliability of relay.
In other embodiments, the relay driving circuit is further provided with a coil freewheeling module 14, a first end of the coil freewheeling module 14 is connected to a first end of the coil of the relay, a second end of the coil freewheeling module 14 is connected to a second end of the coil of the relay, and the coil freewheeling module 14 is configured to provide a freewheeling loop when the coil of the relay is de-energized, so that the contact of the relay is turned off. When the relay is disconnected, the coil of the relay generates reverse current due to its own structure, damping and the like, and at this time, the coil freewheeling module 14 may be arranged to freewheel and consume the current in the coil, so as to avoid damage to the coil, for example, the coil is connected in parallel with a diode to form a freewheeling circuit.
Referring to fig. 3, the coil freewheel module includes a TVS diode (Transient Voltage Suppressor) connected in parallel to the coil of the relay. The TVS1 shown in the figure is a bidirectional TVS diode that is turned off in a very short time (up to 1 × 10) when the relay is turned off -12 Second) to quickly turn into a reverse conducting state, and clamp the voltage of the circuit on a required safety value, thereby effectively protecting devices such as a coil and the like from being damaged, and the bidirectional TVS diode can play a role in restraining current in forward and reverse directions without considering the positive and negative voltage in the circuit. The coil current is continued by the TVS1 clamping circuit, so that the follow current process can be delayed, the coil follow current is reduced, and the contact of the relay can be switched off more quickly.
It should be noted that the preferred embodiments of the present invention are shown in the specification and the drawings, but the present invention can be realized in many different forms, and is not limited to the embodiments described in the specification, which are not intended as additional limitations to the present invention, and are provided for the purpose of making the understanding of the present disclosure more thorough and complete. Moreover, the above technical features are combined with each other to form various embodiments which are not listed above, and all the embodiments are regarded as the scope of the present invention; further, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A relay drive circuit, comprising:
the first end of the first power supply module is used for being connected with a first power supply, the second end of the first power supply module is connected with the first end of the coil of the relay, and the third end of the first power supply module is connected with the second end of the coil of the relay;
a first end of the second power supply module is used for being connected with a second power supply, a second end of the second power supply module is connected with a first end of a coil of the relay, and the power supply voltage of the second power supply is smaller than that of the first power supply;
a control end of the drive control module is used for receiving a drive signal, a first end of the drive control module is connected with a third end of the first power supply module, a second end of the drive control module is grounded, and the drive control module is used for controlling the first power supply and the second power supply to supply power to a coil of the relay based on the drive signal;
the first power supply module comprises a delay unit and a switch tube Q2, the first end of the switch tube Q2 is connected with the first power supply, the second end of the switch tube Q2 is connected with the first end of a coil of the relay, the control end of the switch tube Q2 is connected with the second end of the delay unit, the first end of the delay unit is used for being connected with the first power supply, the third end of the delay unit is grounded, and the delay unit is used for delaying to preset time control after the drive control module receives a drive signal to disconnect the switch tube Q2, so that the first power supply stops supplying power to the coil of the relay.
2. The relay driving circuit according to claim 1, wherein the delay unit includes a voltage divider subunit, a switching tube Q1, a resistor R3, a resistor R4, and a capacitor C1, a first end of the voltage divider subunit is connected to the first power supply, a second end of the voltage divider subunit is connected to the first end of the driving control module, a third end of the voltage divider subunit is connected to the control end of the switching tube Q1, the first end of the switching tube Q1 is used for connecting to the first power supply, the second end of the switching tube Q1 is connected to the first end of the capacitor C1 through the resistor R3, the second end of the switching tube Q1 is grounded through the resistor R4, and the second end of the capacitor C1 is grounded;
the switch tube Q1 is used for being conducted after the drive control module receives a drive signal to charge the capacitor C1, and when the voltage of the capacitor C1 reaches the disconnection voltage value of the switch tube Q2, the delay unit controls the switch tube Q2 to be disconnected, so that the first power supply stops supplying power to the coil of the relay.
3. The relay driving circuit according to claim 2, wherein the voltage divider unit includes a resistor R1 and a resistor R2 connected in series, two ends of the resistor R1 are respectively connected to the first power source and the control end of the switch Q1, and two ends of the resistor R2 are respectively connected to the control end of the switch Q1 and the first end of the driving control module.
4. The relay driving circuit according to claim 1, wherein the switching transistor Q2 is a PNP-type triode.
5. The relay driving circuit according to claim 1, wherein the second power supply module is a diode D1, a cathode of the diode D1 is connected to the first end of the coil of the relay, and an anode of the diode D1 is connected to the second power supply.
6. The relay driving circuit according to claim 1, wherein the driving control module includes a switching tube Q3 and a resistor R5, a first end of the switching tube Q1 is connected to the third end of the first power supply module, a second end of the switching tube Q1 is grounded, and a control end of the switching tube Q3 is configured to receive the driving signal through the resistor R5.
7. The relay driver circuit according to claim 6, wherein the switching transistor Q3 is an NPN transistor.
8. The relay drive circuit according to any one of claims 1 to 7, wherein the relay drive circuit is further provided with a coil freewheel module, a first end of the coil freewheel module is connected to a first end of the coil of the relay, and a second end of the coil freewheel module is connected to a second end of the coil of the relay.
9. The relay driver circuit according to claim 8, wherein the coil freewheel module is a TVS diode connected in parallel to the coil of the relay.
10. An energy storage power supply comprising a relay drive circuit according to any one of claims 1 to 9, and a relay electrically connected to the relay drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221671232.6U CN217562478U (en) | 2022-06-29 | 2022-06-29 | Relay drive circuit and energy storage power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221671232.6U CN217562478U (en) | 2022-06-29 | 2022-06-29 | Relay drive circuit and energy storage power supply |
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| CN217562478U true CN217562478U (en) | 2022-10-11 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115799001A (en) * | 2022-11-09 | 2023-03-14 | 东方博沃（北京）科技有限公司 | Relay driving device |
| CN117410933A (en) * | 2023-12-08 | 2024-01-16 | 深圳市德兰明海新能源股份有限公司 | Overvoltage protection circuit and energy storage power supply |
| CN117498663A (en) * | 2023-12-27 | 2024-02-02 | 深圳市德兰明海新能源股份有限公司 | Power supply switch driving circuit and energy storage power supply |
-
2022
- 2022-06-29 CN CN202221671232.6U patent/CN217562478U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115799001A (en) * | 2022-11-09 | 2023-03-14 | 东方博沃（北京）科技有限公司 | Relay driving device |
| CN117410933A (en) * | 2023-12-08 | 2024-01-16 | 深圳市德兰明海新能源股份有限公司 | Overvoltage protection circuit and energy storage power supply |
| CN117410933B (en) * | 2023-12-08 | 2024-05-17 | 深圳市德兰明海新能源股份有限公司 | Overvoltage protection circuit and energy storage power supply |
| CN117498663A (en) * | 2023-12-27 | 2024-02-02 | 深圳市德兰明海新能源股份有限公司 | Power supply switch driving circuit and energy storage power supply |
| CN117498663B (en) * | 2023-12-27 | 2024-04-16 | 深圳市德兰明海新能源股份有限公司 | Power supply switch driving circuit and energy storage power supply |
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Address after: 518000 19th floor, building 1, kaidar group center building, No. 168, Tongsha Road, Xinwei community, Xili street, Nanshan District, Shenzhen, Guangdong Patentee after: Shenzhen Delian Minghai New Energy Co.,Ltd. Address before: 518000 19th floor, building 1, kaidar group center building, 168 Tongsha Road, Xili street, Nanshan District, Shenzhen, Guangdong Patentee before: Shenzhen Poweroak Newener Co.,Ltd. |