CN219936947U - Driving circuit of relay and electronic equipment - Google Patents
Driving circuit of relay and electronic equipment Download PDFInfo
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- CN219936947U CN219936947U CN202223219053.1U CN202223219053U CN219936947U CN 219936947 U CN219936947 U CN 219936947U CN 202223219053 U CN202223219053 U CN 202223219053U CN 219936947 U CN219936947 U CN 219936947U
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Abstract
The utility model relates to a driving circuit of an electric appliance and electronic equipment, wherein the driving circuit comprises a first switch module, a second switch module, a third switch module and a voltage stabilizing module, a first end of the first switch module is connected with a driving power supply and a first end of a coil of a relay, a second end of the first switch module is grounded, and a control end is used for being conducted after a first time delay after receiving a driving signal; the control end of the second switch module is used for delaying the second time to be conducted after receiving the driving signal; the first end of the third switch module is used for being connected with the second end of the coil, the second end is grounded through the second switch module, the control end is connected with the first end of the first switch module, and the voltage stabilizing module is connected with the third switch module in parallel; the third switch module is turned off when the first switch module is turned on and turned on when the first switch module is turned off; wherein the first time period is longer than the second time period. The utility model can realize the coil pre-actuation and actuation work of the relay through one driving signal, and can reduce the loss of the coil in the actuation state.
Description
Technical Field
The present utility model relates to the field of relays, and in particular, to a driving circuit and an electronic device for a relay.
Background
The Relay is an electronic control device and plays roles of automatic regulation, safety protection, circuit switching and the like in a circuit. The working process of the relay is mainly divided into two actions of pre-actuation and actuation, the coil can be pulled up quickly by needing larger voltage at two ends of the relay in the pre-actuation state, and the relay can be ensured to be actuated reliably by needing enough actuation time in the pre-actuation state.
Disclosure of Invention
The utility model discloses a driving circuit of a relay and electronic equipment, which solve the problem that reliable attraction of a coil of the relay cannot be ensured in the attraction process of the relay.
In a first aspect, the present utility model provides a driving circuit of a relay, where the driving circuit of the relay includes a first switch module, a second switch module, a third switch module, and a voltage stabilizing module:
the first end of the first switch module is connected with the driving power supply, and the first end of the first switch module is also used for being connected with the first end of the coil of the relay; the second end of the first switch module is grounded, the control end of the first switch module is used for receiving a driving signal, and the first switch module is also used for being conducted after delaying for a first time length after receiving the driving signal;
the control end of the second switch module is used for receiving the driving signal and is also used for being conducted after delaying a second time length after receiving the driving signal;
the first end of the third switch module is used for being connected with the second end of the coil of the relay, and the second end of the third switch module is grounded through the second switch module; the control end of the third switch module is connected with the first end of the first switch module, and the voltage stabilizing module is connected with the third switch module in parallel; the third switch module is used for being disconnected when the first switch module is connected and also used for being connected when the first switch module is disconnected; wherein the first time period is longer than the second time period.
In a second aspect, the present utility model provides an electronic device comprising the driving circuit of the relay provided in the first aspect.
The utility model provides a driving circuit of a relay and electronic equipment, which are characterized in that the structure of the driving circuit of the coil of the relay is improved, the conduction time of a first switch module and a second switch module corresponding to the pre-actuation and the actuation of the coil is respectively set to be a first time length and a second time length, the coil is ensured to be switched to be kept in an actuation state after the reliable pre-actuation by making the first time length longer than the second time length, and the relay coil and a contact of the relay can be reliably actuated by adopting the driving circuit of the relay provided by the utility model, and the power consumption of the coil is reduced under the condition that the coil is kept in the actuation state, so that the service life of the relay is greatly prolonged.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a driving circuit of a relay according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a driving circuit according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of a driving circuit according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram of a driving circuit according to an embodiment of the present utility model;
FIG. 5 is a schematic diagram of a driving circuit according to an embodiment of the present utility model;
FIG. 6 is a schematic diagram of a driving circuit according to an embodiment of the present utility model;
FIG. 7 is a schematic diagram of a driving circuit according to an embodiment of the present utility model;
FIG. 8 is a schematic diagram of a driving circuit according to an embodiment of the present utility model;
fig. 9 is a schematic diagram of a driving circuit of another relay according to an embodiment of the present utility model;
fig. 10 is a schematic structural diagram of an electronic device according to an embodiment of the present utility model.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The flow diagrams depicted in the figures are merely illustrative and not necessarily all of the elements and operations/steps are included or performed in the order described. For example, some operations/steps may be further divided, combined, or partially combined, so that the order of actual execution may be changed according to actual situations.
It is to be understood that the terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that, in order to clearly describe the technical solutions of the embodiments of the present utility model, in the embodiments of the present utility model, the words "first", "second", etc. are used to distinguish identical items or similar items having substantially the same function and effect. For example, the first recognition model and the second recognition model are merely for distinguishing between different callback functions, and are not limited in their order of precedence. It will be appreciated by those of skill in the art that the words "first," "second," and the like do not limit the amount and order of execution, and that the words "first," "second," and the like do not necessarily differ.
It should also be understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
In order to facilitate understanding of the embodiments of the present utility model, some words related to the embodiments of the present utility model are briefly described below.
1. The relays with different types have different sucking time and coil resistance, so that when one product selects a plurality of relays with different types, the driving circuits of a plurality of sets of relays are required to be designed to meet the requirements.
2. The driving circuit of the relay: the relay actuation usually needs 10 ms-20 ms, and if the driving circuit of the relay cannot ensure the time required by the relay actuation, the relay cannot be actuated reliably or even the service life of the relay can be directly influenced by repeated actuation. And then, the resistances of the coil resistances of the relays of different types are different in size, so that the coil voltage in the pre-actuation state of the coil of the relay is ensured to meet the requirement, and the coil voltage in the actuation state of the relay is ensured not to cause the failure of the coil resistance due to too large power consumption.
When the resistance of the relay coil is smaller, the driving of the relay coil is generally divided into two steps of pre-actuation and actuation, the driving circuit of the existing relay generally adopts two sets of driving circuits, two IO port resources of an MCU/DSP are needed to be occupied, n relays are arranged, the number of the MCU/DSP IO ports needed by the control relay is 2*n, when a plurality of relays are needed to be adopted in one device, more MCU/DSP of Pin feet are needed to be selected to provide enough IO port resources, the price of the MCU/DSP of the Pin feet is more expensive, the cost of products is increased, and the competitiveness of the products is reduced.
Some embodiments of the present utility model are described in detail below. The following embodiments and features of the embodiments may be combined with each other without conflict.
Referring to fig. 1, fig. 1 is a schematic diagram of a driving circuit of a relay 10 according to an embodiment of the utility model. In the embodiment of the present utility model, the driving circuit of the relay 10 is used to drive the coil 11 of the relay 10. As shown in fig. 1, the driving circuit may include a first switching module 20, a second switching module 30, a third switching module 40, and a voltage stabilizing module 50. Wherein, the first end of the first switch module 20 is connected with the driving power supply, and the first end of the first switch module 20 is also used for connecting with the first end of the coil 11 of the relay 10; the second end of the first switch module 20 is grounded, the control end of the first switch module 20 is used for receiving a driving signal, and the first switch module 20 is also used for being conducted after delaying for a first time length after receiving the driving signal; the control end of the second switch module 30 is also used for receiving the driving signal, and is also used for being turned on after delaying the second time length after receiving the driving signal; the first end of the third switch module 40 is used for being connected with the second end of the coil 11 of the relay 10, and the second end of the third switch module 40 is grounded through the second switch module 30; the control end of the third switch module 40 is connected with the first end of the first switch module 20, and the voltage stabilizing module 50 is connected in parallel with the third switch module 40; the third switch module 40 is configured to be turned off when the first switch module 20 is turned on, and is also configured to be turned on when the first switch module 20 is turned off; wherein the first switch module 20 is turned on after the second switch module 30, i.e. the first time period is longer than the second time period.
Specifically, when the first switch module 20 is not turned on, the control end of the third switch module 40 receives the electric signal input by the driving power supply and turns on, when the third switch module 40 is turned on, after the driving signal delays charging the control end of the second switch module 30 for a second period of time, the second switch module 30 is turned on, and at this time, the output voltage of the driving power supply flows into the ground from the second switch module 30 through the coil 11 of the relay 10 and the third switch module 40, so that it can be ensured that the two ends of the coil 11 have enough voltage in the pre-actuation process, and reliable actuation of the contacts of the relay 10 and the coil 11 is ensured. After the driving signal delays charging the control end of the first switch module 20 for a first period of time, the first switch module 20 is turned on, the output voltage of the driving power supply flows into the ground after passing through the first switch module 20, at this time, the control end potential of the third switch module 40 is changed to the direction of the first switch module 20 to disconnect the third switch module 40, at this time, the output voltage of the driving power supply flows into the ground from the second switch module 30 after passing through the coil 11 and the voltage stabilizing module 50, and due to the existence of the voltage stabilizing module 50, the coil 11 can be enabled to be in the sucking process to reduce the voltages at two ends of the coil 11 under the condition of ensuring that the requirement is met, so that the loss of the coil 11 is reduced to improve the service life of the relay 10.
It should be noted that, after the driving signal controls the second switch module 30 to be turned on and before the first switch module 20 is controlled to be turned on, that is, when the coil 10 is switched from the pre-actuation state to the actuation state, a sufficient pre-actuation time of the coil 11 of the relay 10 needs to be ensured so that the coil 11 can complete reliable actuation under the condition of high voltage at both ends.
For example, in some embodiments, the first time period is longer than the second time period, and the difference between the first time period and the second time period is a preset time period, where the preset time period may be 10ms, the preset time period may be 15ms, and the preset time period may also be 20ms, where the preset time period is related to the pre-suction time of the coil 11, that is, related to the specification of the relay 10, so embodiments of the present utility model are not limited herein.
In some embodiments, the driving signal may be a Pulse Width ModulaTIon (PWM) signal, and the driving of the relay 10 can be achieved by charging the first switch module 20 and the second switch module 30 with the PWM signal.
In some embodiments, the output voltage of the driving power supply may be 10V, the output voltage of the driving power supply may be 12V, and the output voltage of the driving power supply may be 18V.
It should be noted that, the product of the duty ratio of the PWM signal and the value of the output voltage of the driving power supply should be smaller than the rated voltage of the coil 11 of the relay 10 and larger than the holding voltage of the coil 11 of the relay 10, where the holding voltage is the voltage value required by the coil 11 of the relay 10 in the holding-on state, and by selecting a suitable driving power supply and the duty ratio, it is able to ensure that the relay 10 is not damaged during operation and the loss of the coil 11 is reduced as much as possible.
It should be noted that, the control ends of the first switch module 20 and the second switch module 30 receive the driving signals sent from the same interface, and the first switch module 20 and the second switch module 30 charge according to the driving signals, so that the driving of the relay 10 can be completed under the condition of using one driving circuit, and the Pin number in the device research and development process can be reduced, so that the device research and development cost can be reduced.
In some embodiments, as shown in fig. 2, fig. 2 is a schematic diagram of a first switch module 20 according to an embodiment of the present utility model. In fig. 2, the first switch module 20 includes a first charging unit 21, a comparing unit 22, and a first switch unit 23, wherein an input end of the first charging unit 21 is used for receiving a driving signal, an output end of the first charging unit 21 is connected with the comparing unit 22, and the first charging unit 21 is used for receiving the driving signal to charge and outputting a first charging signal to the comparing unit 22 in the charging process; a first input end of the comparison unit 22 is connected with an output end of the first charging unit 21, a second input end of the comparison unit 22 is used for receiving a preset voltage signal, and the comparison unit 22 is used for outputting a conducting signal to the first switching unit 23 when the first charging signal is larger than the preset voltage signal; the first end of the first switch unit 23 is connected with the driving power supply, the first end of the first switch unit 23 is also used for being connected with the first end of the coil 11 of the relay 10, the second end of the first switch unit 23 is grounded, the control end of the first switch unit 23 is connected with the output end of the comparison unit 22, and the first switch unit 23 is used for being conducted when receiving a conducting signal. The comparison unit 22 is arranged, so that the first switch unit 23 is prevented from being turned on by mistake, and the reliability of the driving circuit of the relay 10 provided by the embodiment of the utility model is improved.
The input end of the first charging unit 21 starts charging after receiving the driving signal, the first input end of the comparing unit 22 receives the first charging signal output by the output end of the first charging unit 21 in real time during charging, the second input end of the comparing unit 22 inputs the preset voltage signal, and if and only if the first charging signal is greater than the preset voltage signal, the comparing unit 22 outputs a conducting signal to the control end of the first switching unit 23, and then the first switching unit 23 is conducted to disconnect the third switching module 40.
It should be noted that, the specific value of the preset voltage signal may be set according to the actual situation, for example, after the second switch module 20 is turned on to make the relay 10 complete the pre-actuation closing, the first switch unit 23 is turned on, and the specific value of the preset voltage signal needs to be matched with the charging time of the first charging unit 21, so as to ensure that the first charging signal received by the comparing unit 22 is greater than the preset voltage signal. The setting of the preset voltage signal needs to be determined according to the charging time of the first charging unit 21, and is not particularly limited herein.
Illustratively, in some embodiments, as shown in fig. 3, fig. 3 is a schematic diagram of a first switching unit 23 according to an embodiment of the present utility model. In fig. 3, the first switching unit 23 includes at least a first transistor Q 1 The method comprises the steps of carrying out a first treatment on the surface of the First triode Q 1 The collector of (1) is connected with a driving power supply, the first triode Q 1 The collector of (2) is also connected to the first terminal of the coil 11 of the relay 10, the first triode Q 1 The emitter of (1) is grounded, the first triode Q 1 Is connected to the output of the comparison unit 22.
After the first charging unit 21 is charged by the driving signal for a first period of time, the contact of the relay 10 is reliably attracted to the coil 11 due to the first conduction of the second switch module 30, and the comparing unit22 the first input terminal outputs a turn-on signal to the first transistor Q when the first charge signal inputted from the first input terminal is greater than the preset voltage signal inputted from the second input terminal 1 To turn on the first triode Q 1 . At this time, the output voltage of the driving power supply is input into the first triode Q 1 Is from behind the collector of the first triode Q 1 At this time, the control end of the third switch module 40 is pulled down to be grounded, and then the third switch module 40 is turned off, at this time, the output voltage of the driving power source flows into the ground from the second switch module 30 after passing through the coil 11 and the voltage stabilizing module 50 of the relay 10, and the voltage stabilizing value of the voltage stabilizing module 50 is larger, so that the voltage at two ends of the coil 11 can be reduced under the condition that the coil 11 is ensured to meet the requirement of the actuation voltage in the actuation process, thereby reducing the loss of the coil 11 to improve the service life of the relay 10.
It should be noted that, the first switch unit 23 may also be a first MOS transistor, and the first switch unit 23 may also be a first IGBT, so long as the first switch unit 23 can receive the conducting signal output by the output end of the comparing unit 22 and conduct, the driving circuit of the relay 10 provided by the present utility model may be implemented, so the type of the first switch unit 23 is not limited.
Illustratively, in some embodiments, as shown in fig. 4, fig. 4 is a schematic diagram of a first charging unit 21 provided by an embodiment of the present utility model. In fig. 4, the first charging unit 21 includes at least a first resistor R 1 And a first capacitor C 1 The method comprises the steps of carrying out a first treatment on the surface of the First resistor R 1 Is connected to the input of the first charging unit 21 for receiving the driving signal, a first resistor R 1 And the second end of the capacitor (C) 1 Is connected to the first end of the housing; first capacitor C 1 A first capacitor C connected to the output terminal of the first charging unit 21 for outputting a first charging signal 1 Is grounded.
The first capacitor C 1 The charging time of (2) is calculated as follows:
wherein t is 1 Is the first capacitance C 1 Charging time of R 1 Is a first resistor R 1 Resistance value C of (C) 1 Is the first capacitance C 1 V of (2) 1 Is the first capacitance C 1 Voltage value of full charge, V 01 Is the first capacitance C 1 Initial voltage value of V t1 Is the first capacitance C 1 At a charging time t 1 Voltage value at that time.
By way of example, the time t can be calculated by the above equation 1 For a first period of time, the first capacitor C 1 The magnitude of the output first charging signal is input as a preset voltage signal value to the second input terminal of the comparator 22, so that the first switch unit 23 is turned on after being delayed for a first period of time.
The first resistor R 1 And a first capacitor C 1 The drive signal can also be filtered to inhibit and prevent disturbances from affecting the drive process of the relay 10.
Illustratively, in some embodiments, as shown in fig. 5, fig. 5 is a schematic diagram of a second switch module 30 provided by an embodiment of the present utility model. In fig. 5, the second switch module 30 includes a second charging unit 31 and a second switch unit 32, wherein an input end of the second charging unit 31 is used for receiving a driving signal, an output end of the second charging unit 31 is connected with the second switch unit 32, and the second charging unit 31 is used for receiving the driving signal to charge and outputting a second charging signal to the second switch unit 32 in the charging process; the first end of the second switch unit 32 is connected to the second end of the third switch module 40, the second end of the second switch unit 32 is grounded, the control end of the second switch unit 32 is connected to the output end of the second charging unit 31, and the second charging unit 31 is configured to be turned on when the second charging signal reaches the turn-on voltage.
The second charging unit 31 starts charging after receiving the driving signal, in the charging process, the second charging unit 31 outputs a second charging signal to the second switching unit 32 through the output end, and the second switching unit 32 is turned on when the second charging signal is greater than the turn-on voltage, so that the driving power supply is grounded after passing through the coil of the relay 10, the third switching module and the second switching unit 32, and the coil 11 starts to enter the pre-suction state.
It should be noted that, the magnitude of the conducting voltage value is matched with the magnitude of the second charging signal that can be output by the second charging unit 31 when the second charging unit is charged for the second duration, so that the second charging unit 31 is conducted after the second charging unit 31 is charged for the second duration in a delayed manner by the driving signal.
Illustratively, in some embodiments, as shown in fig. 6, fig. 6 is a schematic diagram of a second charging unit 31 provided by an embodiment of the present utility model. In fig. 6, the second charging unit 31 includes at least a second resistor R 2 And a second capacitor C 2 The method comprises the steps of carrying out a first treatment on the surface of the Second resistor R 2 A second resistor R connected to the input of the second charging unit 31 for receiving the driving signal 2 And a second capacitor C 2 Is connected to the first end of the housing; second capacitor C 2 A second capacitor C connected to the output end of the second charging unit 31 for outputting a second charging signal 2 Is grounded.
Note that, the charging time of the second capacitor 312 is calculated as follows:
wherein t is 2 Is the second capacitance C 2 Charging time of R 2 Is a second resistor R 2 Resistance value C of (C) 2 Is the second capacitance C 2 V of (2) 2 Is the second capacitance C 2 Voltage value of full charge, V 02 Is the second capacitance C 2 Initial voltage value of V t2 Is the second capacitance C 2 At a charging time t 2 Voltage value at that time.
Exemplary, the time t can be calculated by the above equation 2 For a second period of time, if the second capacitance C 2 Voltage value V of (2) t2 Greater than the second capacitance C 2 The on voltage of (i.e. the fully charged voltage value V) 2 Second capacitor C 2 Outputting a secondThe charging signal is given to the second switching unit 33, so that the second switching unit 33 is turned on after a second time period.
The second resistor R 2 And a second capacitor C 2 The drive signal can also be filtered to inhibit and prevent disturbances from affecting the drive process of the relay 10.
It should be noted that, in some embodiments, the second resistor R 2 The resistance value of (2) is smaller than the first resistance R 1 In some embodiments, a second capacitance C 2 Is smaller than the first capacitance C 1 In some embodiments, a second resistance R 2 The resistance value of (2) is smaller than the first resistance R 1 Resistance value of (C) and second capacitance C 2 Is smaller than the first capacitance C 1 Is a function of the capacity of the battery. Referring to fig. 6, by adjusting the first resistance R 1 Resistance value of (C) a first capacitance C 1 Capacity of (2), second resistance R 2 Resistance value of (C) a second capacitance C 2 The first time period is longer than the second time period, and the difference between the first time period and the second time period can reliably attract the coil 11 to the contact of the relay 10.
In some embodiments, as shown in fig. 7, fig. 7 is a schematic diagram of a voltage stabilizing module 50 according to an embodiment of the present utility model. In fig. 7, the voltage stabilizing module 50 at least includes a zener diode D 1 Voltage stabilizing diode D 1 In parallel with the third switching module 40.
By selecting a zener diode D 1 After the third switch module 40 is turned off, the second end of the coil 11 is input through the zener diode D 1 And the second switch module 30, and then flows to the ground, the voltage stabilizing diode D 1 The voltage stabilizing value of the coil 11 is reduced in the pull-in process, and the voltage of the coil 11 is larger than the holding voltage of the coil 11 at the moment, namely, the voltage stabilizing diode D is possibly used under the condition of ensuring the normal pull-in of the coil 1 Is selected so that the voltage across the coil 11 is as close as possible to the holding voltage of the coil 11, and is a zener diode D 1 The self-loss is low, the heat generation is less, the failure risk is low, and the reliability of the driving circuit provided by the embodiment of the utility model is improvedThereby reducing the loss of the coil 11.
The loss of the coil 11 is calculated as follows:
wherein P is 1 V for loss of coil 11 cc To drive the output voltage of the power supply, V 3 Is a voltage stabilizing diode D 1 Voltage stabilizing value of R 3 Is the resistance value of the coil 11.
Exemplary, in some embodiments, zener diode D 1 The voltage stabilizing value of (C) can be 0.3 times of the output voltage of the driving power supply, and the voltage stabilizing diode D 1 The voltage stabilizing value of (C) can be 0.4 times of the output voltage of the driving power supply, and the voltage stabilizing diode D 1 The voltage stabilizing value of (C) can be 0.5 times of the output voltage of the driving power supply, and the voltage stabilizing diode D 1 The voltage stabilizing value of (2) is selected according to the magnitude of the holding voltage required by the coil 11 to maintain the attracted state and the output voltage of the driving power supply, and the voltage stabilizing diode D is used for ensuring that the coil 11 can maintain the attracted state 1 The voltage stabilizing value (or the voltage stabilizing value consistent with the holding voltage of the coil 11) which is as large as possible is selected, so that the loss of the coil 11 of the relay 10 can be reduced to the greatest extent and the service life of the coil can be prolonged.
In some embodiments, the voltage stabilizing module 50 includes at least a first voltage dividing resistor R w A first voltage dividing resistor R w In parallel with the third switching module 40. In some embodiments, the first voltage dividing resistor R w The resistance value of the coil 10 may be equal to the resistance value of the coil 11, so that the voltage across the coil 11 in the pull-in state is reduced, thereby reducing the loss of the coil.
Exemplary, in some embodiments, a first divider resistor R w The resistance value of (2) may be 0.3 times the resistance value of the coil 10, the first voltage dividing resistor R w The resistance value of (2) may be 0.4 times the resistance value of the coil 10, the first voltage dividing resistor R w The resistance value of (2) may be 0.5 times the resistance value of the coil 10, the first voltage dividing resistor R w The resistance value of (2) is selected as the rootThe first voltage dividing resistor R is selected according to the magnitude of the holding voltage required by the coil 11 to hold the attraction state, and the first voltage dividing resistor R is used for ensuring that the coil 11 can hold the attraction state w The resistance value of the relay 10 is selected to be as large as possible, so that the loss of the coil 11 of the relay 10 can be reduced to the greatest extent and the service life of the relay can be prolonged.
Referring to fig. 8, fig. 8 is a schematic diagram of a driving circuit according to an embodiment of the utility model, and the driving circuit further includes an anti-reflection module 60;
the input end of the anti-reflection module 60 is connected to the first end of the first switch module 20, and the second end of the anti-reflection module 60 is connected to the control end of the third switch module 40. The anti-reverse module 60 is configured to conduct the output of the driving power supply in one direction, that is, the output voltage of the driving power supply is output to the control end of the third switch module 40 through the anti-reverse module 60, and when the third switch module 40 is abnormal or damaged, the related voltage or current cannot be output to the driving power supply or to the first switch module through the anti-reverse module 60.
Referring to fig. 9, fig. 9 is a schematic diagram of a driving circuit of another relay 10 according to an embodiment of the utility model. As shown in fig. 9, the driving circuit of the relay 10 is used for driving the coil 11 of the relay 10, the driving signal simultaneously charges the first switch module 20 and the second switch module 30, and the driving circuit of the relay 10 comprises the first switch module 20, the second switch module 30, the third switch module 40, the voltage stabilizing module 50, the anti-reverse module 60 and the second voltage dividing resistor R 4 。
The first switching module 20 includes a first charging unit 21, a comparing unit 22, and a first switching unit 23. The first charging unit 21 includes a first resistor R 1 And a first capacitor C 1 First resistor R 1 A first resistor R connected to the input terminal of the first charging unit 21 1 And the second end of the capacitor (C) 1 A first capacitor C connected to the first end of 1 A first capacitor C connected to the output terminal of the first charging unit 21 1 Is grounded. The comparing unit 22 includes a comparator 221 and a hysteresis resistor R 5 A first input terminal of the comparator 221 is connected to the output terminal of the first charging unit 21A second end of the comparator 221 inputs a preset voltage signal Vref, and a hysteresis resistor R is connected between the first input end and the output end of the comparator 221 5 The first switching unit 23 includes a first transistor Q 1 First triode Q 1 A first triode Q is connected with the output end of the comparator 221 1 Collector of (2) and a second voltage dividing resistor R 4 A first end of the second voltage dividing resistor R is connected to 4 A second end of the voltage divider R is connected with a driving power supply 4 A first triode Q is also connected to the first end of the coil 11 1 Is grounded when the driving signal is sent to the first resistor R 1 For the first capacitor C 1 After the first period of time, when the first charging signal output from the output terminal of the first charging unit 21 is greater than the preset voltage signal, the output terminal of the comparator 221 outputs a turn-on signal to the first triode Q 1 To turn on the first triode Q 1 。
The second switching module 30 includes a second charging unit 31 and a second switching unit 32. The second charging unit 31 includes at least a second resistor R 2 And a second capacitor C 2 The method comprises the steps of carrying out a first treatment on the surface of the Second resistor R 2 A second resistor R connected to the input of the second charging unit 31 for receiving the driving signal 2 And a second capacitor C 2 Is connected to the first end of the housing; second capacitor C 2 A second capacitor C connected to the output end of the second charging unit 31 for outputting a second charging signal 2 Is grounded. The second switching unit 32 includes a second triode Q 2 Second triode Q 2 The base electrode of the second transistor Q is connected with the output end of the second charging unit 31 2 The collector of the second transistor Q is connected to the output terminal of the third switch module 40 2 Is grounded when the driving signal is sent to the second resistor R 2 To the second capacitor C 2 After the second period of time, the second charging signal output by the output terminal of the second charging unit 31 is supplied to the second triode Q 2 To turn on the second triode Q 2 。
In the first triode Q 1 The third switch module 40 is turned on when not turned on due to stabilityThe voltage module 50 is connected in parallel with the third switching module 40, so that the voltage stabilizing module 50 is short-circuited, and the third switching module 40 includes a third transistor Q 3 And a third voltage dividing resistor R 3 Third triode Q 3 Base of (d) and third voltage dividing resistor R 3 A third triode R connected to the first end of 3 The base electrode of (a) is also connected with the first triode Q 1 Collector connection of the third triode Q 3 Collector of (d) and third voltage dividing resistor R 3 A third voltage dividing resistor R connected to the first end of 3 Is connected to the input of the third switching module 40, i.e. a third voltage dividing resistor R 3 A third triode Q connected to the second end of the coil 11 3 The emitter of the third transistor Q is connected to the output terminal of the third switch module 40 3 Emitter and second triode Q 2 Is connected to the collector of the capacitor. The anti-reverse module 60 includes an anti-reverse diode D 2 The anti-reverse diode D 2 Is used as the input terminal of the anti-reverse module 60, the anti-reverse diode D 2 As the output of the anti-reverse diode.
In the case of the driving signal charging the second charging unit 31 for a second period of time, i.e. via the second resistor R 2 To the second capacitor C 2 After charging for a second period of time, the second capacitor C 2 After the charging is completed, the output end of the second charging unit 31 outputs a second charging signal to the second triode Q 2 To turn on the second triode Q 2 At this time, the output voltage of the driving power supply passes through the coil 11 and the third voltage dividing resistor R 3 Third triode Q 3 And a second triode Q 2 After flowing to the ground, the coil 11 enters a pre-suction state due to the third voltage dividing resistor R 3 The resistance value of the coil 11 is far smaller than that of the coil 11, so that the voltage at both ends of the coil 11 is large, and reliable attraction of the coil 11 and the contact of the relay 10 can be ensured.
In the case of the driving signal charging the first charging unit 21 for a first period of time, i.e. via the first resistor R 1 For the first capacitor C 1 After the first period of time, when the first charging signal output from the output terminal of the first charging unit 21 is greater than the preset voltage signal, the output terminal of the comparator 221 outputs a turn-on signalFor the first triode Q 1 To turn on the first triode Q 1 . At this time due to the third triode Q 3 Is changed to the first triode Q 1 Direction of the third triode Q 2 The coil 11 is kept in the on state when the voltage regulator module 50 includes a voltage regulator diode D 1 Voltage stabilizing diode D 1 In parallel with the third switch module 40, so that the output voltage of the driving power supply passes through the coil 11 and the zener diode D 1 And a second triode Q 2 And then flows to ground. At this time, the voltage value of the coil 11 in the pull-in state is the output voltage of the driving power source minus the zener diode D 1 The loss of the coil 11 can be effectively reduced and the life of the coil can be prolonged.
It should be noted that, the first switch module 20, the second switch module 30, and the third switch module 40 may also be MOS transistors and IGBTs, which can all implement the driving circuit of the relay 10 provided in the embodiment of the present utility model.
The utility model provides a driving circuit of a relay 10, which is characterized in that the structure of the driving circuit of a coil 11 of the relay 10 is improved, the conduction time of the coil 11 is respectively set to be a first time length and a second time length corresponding to the first switch module 20 and the second switch module 30 in a pre-actuation and actuation mode, the coil 11 is ensured to be switched to a holding actuation state after being reliably pre-actuated by making the first time length longer than the second time length, and contacts of the coil 11 and the relay 10 of the relay can be reliably actuated by adopting the driving circuit of the relay 10 provided by the utility model, and the power consumption of the coil 11 is reduced under the holding actuation state of the coil 11, so that the service life of the relay 10 is greatly prolonged.
Referring to fig. 10, fig. 10 is a schematic structural diagram of an electronic device 200 according to an embodiment of the utility model. As shown in fig. 10, the electronic apparatus 200 includes: relay 10 and drive circuit 210. The charging driving circuit 210 is used for driving the relay 10 when in operation, so that the coil 11 of the relay 10 can realize switching between pre-actuation and actuation under the control of a driving signal.
In some embodiments, the electronic device may be a power supply device or an energy storage device, and the present embodiment does not limit the type of electronic device.
In some embodiments, the driving circuit 210 may be provided with reference to the examples of fig. 1 to 9. For example, the driving circuit 210 includes the first switch module 20, the second switch module 30, the third switch module 40 and the voltage stabilizing module 50 described in the above embodiments, and the specific setting manner of the driving circuit 210 may refer to the corresponding embodiments described in the present disclosure, which are not repeated herein.
In the description of the present utility model, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as, for example, fixedly coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The above disclosure provides many different embodiments, or examples, for implementing different structures of the utility model. The foregoing description of specific example components and arrangements has been presented to simplify the present disclosure. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.
Claims (10)
1. The driving circuit of the relay is characterized by comprising a first switch module, a second switch module, a third switch module and a voltage stabilizing module:
the first end of the first switch module is connected with a driving power supply, and the first end of the first switch module is also used for being connected with the first end of the coil of the relay; the second end of the first switch module is grounded, the control end of the first switch module is used for receiving a driving signal, and the first switch module is also used for being conducted after delaying for a first time length after receiving the driving signal;
the control end of the second switch module is used for receiving the driving signal and is also used for being conducted after delaying a second time length after receiving the driving signal;
the first end of the third switch module is used for being connected with the second end of the coil of the relay, and the second end of the third switch module is grounded through the second switch module; the control end of the third switch module is connected with the first end of the first switch module, and the voltage stabilizing module is connected with the third switch module in parallel; the third switch module is used for being disconnected when the first switch module is connected and also used for being connected when the first switch module is disconnected;
wherein the first time period is longer than the second time period.
2. The drive circuit according to claim 1, wherein the first switching module includes a first charging unit, a comparing unit, and a first switching unit;
the input end of the first charging unit is used for receiving the driving signal, the output end of the first charging unit is connected with the comparison unit, and the first charging unit is used for receiving the driving signal for charging and outputting a first charging signal to the comparison unit in the charging process;
the first input end of the comparison unit is connected with the output end of the first charging unit, the second input end of the comparison unit is used for receiving a preset voltage signal, and the comparison unit is used for outputting a conduction signal to the first switch unit when the first charging signal is larger than the preset voltage signal;
the first end of the first switch unit is connected with the driving power supply, the first end of the first switch unit is also used for being connected with the first end of the coil of the relay, the second end of the first switch unit is grounded, the control end of the first switch unit is connected with the output end of the comparison unit, and the first switch unit is used for being conducted when receiving the conducting signal.
3. The driving circuit according to claim 2, wherein the first charging unit comprises at least a first resistor and a first capacitor;
the first end of the first resistor is connected with the input end of the first charging unit, and the second end of the first resistor is connected with the first end of the first capacitor;
the first end of the first capacitor is also connected with the output end of the first charging unit, and the second end of the first capacitor is grounded.
4. The driving circuit according to claim 2, wherein the first switching unit includes at least a first transistor;
the collector of the first triode is connected with the driving power supply, the collector of the first triode is also used for being connected with the first end of the coil of the relay, the emitting electrode of the first triode is grounded, and the base electrode of the first triode is connected with the output end of the comparison unit.
5. A driving circuit according to claim 3, wherein the second switching module comprises a second charging unit and a second switching unit;
the input end of the second charging unit is used for receiving the driving signal, the output end of the second charging unit is connected with the second switch unit, and the second charging unit is used for receiving the driving signal for charging and outputting a second charging signal to the second switch unit in the charging process;
the first end of the second switch unit is connected with the second end of the third switch module, the second end of the second switch unit is grounded, the control end of the second switch unit is connected with the output end of the second charging unit, and the second switch unit is used for being conducted when the second charging signal reaches the conducting voltage.
6. The driving circuit according to claim 5, wherein the second charging unit comprises at least a second resistor and a second capacitor;
the first end of the second resistor is connected with the input end of the second charging unit, and the second end of the second resistor is connected with the first end of the second capacitor;
the first end of the second capacitor is also connected with the output end of the second charging unit, and the second end of the second capacitor is grounded.
7. The drive circuit according to claim 6, wherein a resistance value of the second resistor is smaller than a resistance value of the first resistor, and/or a capacity of the second capacitor is smaller than a capacity of the first capacitor.
8. The drive circuit of claim 1, wherein the voltage regulator module comprises at least a zener diode connected in parallel with the third switch module.
9. The drive circuit of claim 1, wherein the drive circuit further comprises an anti-reflection module;
the input end of the anti-reflection module is connected with the first end of the first switch module, and the second end of the anti-reflection module is connected with the control end of the third switch module.
10. An electronic device comprising a relay and a drive circuit of the relay according to any one of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223219053.1U CN219936947U (en) | 2022-11-30 | 2022-11-30 | Driving circuit of relay and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223219053.1U CN219936947U (en) | 2022-11-30 | 2022-11-30 | Driving circuit of relay and electronic equipment |
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| CN219936947U true CN219936947U (en) | 2023-10-31 |
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| CN202223219053.1U Active CN219936947U (en) | 2022-11-30 | 2022-11-30 | Driving circuit of relay and electronic equipment |
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| CN (1) | CN219936947U (en) |
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Address after: 518000 Factory Building 401, Runheng Industrial Plant 1, Fuyuan Road, Zhancheng Community, Fuhai Street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Zhenghao Innovation Technology Co.,Ltd. Country or region after: China Address before: 518000, 1st Floor, Building E, Jiehe Industrial City, Shuitian Community, Shiyan Street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Zhenghao Innovation Technology Co.,Ltd. Country or region before: China |
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