CN215451283U - Relay control device - Google Patents
Relay control device Download PDFInfo
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- CN215451283U CN215451283U CN202120899114.XU CN202120899114U CN215451283U CN 215451283 U CN215451283 U CN 215451283U CN 202120899114 U CN202120899114 U CN 202120899114U CN 215451283 U CN215451283 U CN 215451283U
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Abstract
The application provides a relay control device specifically includes: a first voltage conversion device that converts a voltage of a power supply into a first voltage; a second voltage conversion means for converting a voltage of the power supply into a second voltage, the first voltage being greater than the second voltage; the switch assembly is connected with the first voltage conversion device and the second voltage conversion device; the control device controls the switch assembly to enable the first voltage conversion device and the power supply, the relay forms a relay driving loop or a second voltage conversion device and the power supply through the switch assembly, the relay forms a relay state maintaining loop through the switch assembly, two independent power supplies are adopted to supply power for the relay, namely, the driving voltage for driving the relay to attract and the maintaining voltage for maintaining the relay to attract are distinguished, so that the relay control device effectively reduces the power supply loss of the relay, reduces the self-heating of a relay coil, and meanwhile avoids the problem of EMC.
Description
Technical Field
The application relates to the technical field of relays, in particular to a relay control device.
Background
In the prior art, a rated voltage is applied to a relay coil, and the rated voltage drives the power relay to be attracted or disconnected and simultaneously keeps the attraction or disconnection state of the relay. In fact, the required voltage is lower than the rated voltage when the relay is kept in the pull-in state.
In order to solve the problems of power consumption and heat generation of the power relay in the prior art, after the relay is driven to be switched on or off, when the switching-on or switching-off state of the relay needs to be maintained, the PWM driver is controlled to output a PWM signal with a certain frequency and duty ratio to control the relay to maintain the switching-on or switching-off state of the relay, so that the power consumption and the heat generation of the relay are reduced. However, the high-frequency pulse voltage signal of the PWM control will generate conducted disturbance and radiated interference (EMC) to the circuit where the relay is located and the peripheral circuits.
SUMMERY OF THE UTILITY MODEL
An object of this application is to provide a new relay control device, through relay drive circuit and relay state hold circuit realization reduction relay's consumption and when generating heat, avoid appearing the EMC problem.
The present application in a first aspect provides a relay control device, comprising:
a first voltage conversion device that converts a voltage of a power supply into a first voltage;
second voltage conversion means for converting a voltage of the power supply into a second voltage, the first voltage being greater than the second voltage;
a switch assembly connected with the first voltage conversion device and connected with the second voltage conversion device;
the input end of the control device is connected with the relay, the output end of the control device is connected with the switch assembly, and the switch assembly is controlled to enable the first voltage conversion device and the power supply or the relay to form a relay driving loop through the switch assembly or enable the second voltage conversion device and the power supply or the relay to form a relay state maintaining loop through the switch assembly.
Preferably, the switch assembly includes a first switch and a second switch connected in parallel, the first switch and the first voltage conversion device being connected in series between the power source and the relay, and the second switch and the second voltage conversion device being connected in series between the power source and the relay.
Preferably, the first switch comprises a field effect transistor or a triode; the second switch comprises a unidirectional conducting switch.
Preferably, the control device is connected to the control terminal of the first switch through a delay output terminal of the control device.
Preferably, the first switch comprises a field effect transistor or a triode; the second switch comprises a field effect transistor or a triode and a one-way conduction switch.
Preferably, the control device is connected to the control end of the first switch through a delay output end of the control device, and the control device is connected to the control end of the second switch through a real-time output end of the control device.
A second aspect of the present application provides another relay control device, including:
third voltage conversion means for converting a voltage of the power supply into a third voltage;
a switch assembly connected with the third voltage conversion device;
the input end of the control device is connected with the relay, the output end of the control device is connected with the switch assembly, and the switch assembly is controlled to enable the third voltage conversion device and the power supply or the relay to form a third loop through the switch assembly or enable the power supply and the relay to form a fourth loop through the switch assembly.
Preferably, the third voltage conversion device is a step-up device, and the third switch comprises a field effect transistor or a triode; the fourth switch comprises a unidirectional conducting switch; the control device is connected with the control end of the third switch through the delay output end of the control device; alternatively, the first and second electrodes may be,
the third voltage conversion device is a voltage reduction device, and the third switch comprises a one-way conduction switch; the fourth switch comprises a field effect transistor or a triode; and the control device is connected with the control end of the fourth switch through the delay output end of the control device.
Preferably, the third voltage conversion device is a step-up device, and the third switch comprises a field effect transistor or a triode; the fourth switch comprises a field effect transistor or a triode and a one-way conduction switch; the control device is connected with the control end of the third switch through a delay output end of the control device, and the control device is connected with the control end of the fourth switch through a real-time output end of the control device; alternatively, the first and second electrodes may be,
the third voltage conversion device is a voltage reduction device, and the third switch comprises a field effect transistor or a triode and a one-way conduction switch; the fourth switch comprises a field effect transistor or a triode; the control device is connected with the control end of the fourth switch through the delay output end of the control device, and the control device is connected with the control end of the third switch through the real-time output end of the control device.
In the relay control device, the first voltage conversion device and the power supply and the relay form a relay driving loop through the switch assembly, the second voltage conversion device and the power supply and the relay form a relay state maintaining loop through the switch assembly, two independent power supplies are adopted to supply power to the relay, namely, the driving voltage for driving the relay to attract and the maintaining voltage for maintaining the relay to attract are distinguished, and the second voltage is lower than the first voltage (namely, the maintaining voltage for maintaining the relay to attract is lower than the driving voltage for driving the relay to attract), so the relay control device effectively reduces the power supply loss of the relay, reduces the self-heating of a relay coil, and simultaneously avoids the problem of EMC.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a block diagram of a relay control device in a first embodiment of the present application;
FIG. 2 is a block diagram of the switch assembly of FIG. 1 as a particular switch assembly;
FIG. 3 is a diagram of the connection of the first switch and the second switch of FIG. 2 in a particular embodiment;
FIG. 4 is a block diagram of the switch assembly of FIG. 1 in another specific embodiment;
FIG. 5 is a diagram of the connection of the first switch and the second switch of FIG. 4 in a particular embodiment;
fig. 6 is a block diagram of a relay control apparatus in a second embodiment of the present application;
FIG. 7 is a block diagram of the switch assembly of FIG. 6 in the form of a particular switch assembly;
fig. 8 is a block diagram of the switch assembly of fig. 6 in another embodiment of the switch assembly.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In order to explain the technical means of the present application, the following description will be given by way of specific examples.
An embodiment of the present application provides a relay control device, as shown in fig. 1, where the relay control device 20 is connected between a power supply 10 and a relay 30, and the relay control device 20 includes: a first voltage conversion means 201 for converting the voltage of the power source 10 into a first voltage, a second voltage conversion means 202 for converting the voltage of the power source 10 into a second voltage, a switch assembly 203 and a control means 204, wherein the first voltage is larger than the second voltage, the switch component 203 is connected with the first voltage conversion device 201, meanwhile, the switch assembly 203 is further connected with the second voltage conversion device 202, the input end of the control device 204 is connected with the relay 30 (the input voltage of the relay 30 is collected), the output end of the control device 204 is connected with the switch assembly 203, and the control device 204 controls the switch assembly 203 to enable the first voltage conversion device 201 and the power supply 10 and the relay 30 to form a relay driving loop through the switch assembly 203 or enable the second voltage conversion device 202 and the power supply 10 and the relay 30 to form a relay state maintaining loop through the switch assembly 203.
In the present application, among the first embodiments, the switch assembly may be disposed between the power supply and the first voltage conversion device, and also between the power supply and the second voltage conversion device; in the second embodiment, the switch assembly may also be disposed between the power supply and the first voltage conversion device, and between the second voltage conversion device and the relay; in the third embodiment, the switch assembly may be further disposed between the first voltage conversion device and the relay, and between the power supply and the second voltage conversion device; in the fourth embodiment, as shown in fig. 1, the switch assembly 203 may be disposed between the first voltage conversion device 201 and the relay 30, and between the second voltage conversion device 202 and the relay 30. As long as the switch assembly enables the relay control device of the present application to form the relay drive circuit and the relay state maintaining circuit.
According to the relay control device, the first voltage conversion device 201, the power supply 10 and the relay 30 form a relay driving loop through the switch component 203, the second voltage conversion device 202, the power supply 10 and the relay 30 form a relay state maintaining loop through the switch component 203, two independent power supplies are adopted to supply power to the relay, namely, the driving voltage for driving the relay to attract and the maintaining voltage for maintaining the relay to attract are distinguished, and the second voltage is lower than the first voltage (namely, the maintaining voltage for maintaining the relay to attract is lower than the driving voltage for driving the relay to attract), so that the relay control device effectively reduces the power supply loss of the relay, reduces the self-heating of a relay coil, and simultaneously avoids the problem of EMC.
In a particular embodiment, as shown in fig. 2, the switching assembly 203 includes a first switch 2031 and a second switch 2032 connected in parallel, wherein the first switch 2031 is connected in series with the first voltage conversion device 201 between the power source 10 and the relay 30, and the second switch 2032 is connected in series with the second voltage conversion device 202 between the power source 10 and the relay 30.
In the present application, in the process of switching the relay driving circuit to the relay state maintaining circuit, the relay cannot be de-energized, and the relay driving circuit and the relay state maintaining circuit are required to be simultaneously kept in a communicated state, by connecting the first switch 2031 and the first voltage conversion device 201 in the switch assembly in series between the power source 10 and the relay 30, and by connecting the second switch 2032 and the second voltage conversion device 202 in series between the power source 10 and the relay 30, that is, the relay driving circuit and the relay state maintaining circuit can be simultaneously turned on by controlling the first switch 2031 and the second switch 2032, so as to avoid the problem of de-energizing the relay in the process of switching the relay driving circuit to the relay state maintaining circuit. Specifically, since the first voltage is greater than the second voltage, the relay driving circuit and the relay state maintaining circuit are simultaneously turned on, the relay receives only the first voltage, and the relay receives the second voltage when the first switch 2031 is in the off state, so that the first voltage required for starting the relay is realized, and the second voltage required for maintaining the relay, which is energy-saving and reduces self-heating, is also realized.
In a particular embodiment, as shown in connection with fig. 3, the first switch 2031 comprises a fet S1 or a triode; the second switch 2032 comprises a unidirectional conducting switch D1. The driving relay needs the first switch 2031 to be kept on, and after the relay is switched on and stabilized, the driving relay can be switched to the state of the holding relay, that is, after the relay works stably, the first switch 2031 needs to be controlled to be switched off, and the state of the relay enters a state holding loop, so the first switch 2031 in the application needs to be a field effect transistor S1 or a triode with a control end. Meanwhile, in the process of switching from the driving relay to the holding relay, the first switch 2031 and the second switch 2032 need to be turned on at the same time to prevent the relay from being powered off, so the second switch 2032 needs to prevent a circulating current, that is, the first voltage passing through the first switch 2031 from flowing to the second voltage conversion device, that is, the second switch 2032 needs to be a switch having a unidirectional conduction function.
In a specific embodiment, the control device 204 is connected to the control terminal of the first switch 2301 through the delay output terminal of the control device. In the state from driving the relay to switching to the holding relay, the first switch 2301 needs to be turned off after the second switch 2032 is turned on, that is, the first switch 2031 and the second switch 2032 need to be turned on simultaneously, and how to control the first switch 2301 to be turned off, in this embodiment, a delay scheme of a timer is adopted, and the control device 204 is connected to the control end of the first switch 2301 through the delay output end of the control device to control the turn-off of the first switch 2301.
Specifically, the first voltage, the second voltage and the power supply voltage may be determined according to the type of the relay, in this embodiment, the power supply voltage range is 9-18V, the first voltage conversion device 201 may output a stable first voltage, the first voltage is generally set to 12 ± 2V, the second voltage conversion device 202 may output a stable second voltage, and the second voltage is generally set to 6 ± 0.5V. The first switch 2301 is used to control whether the first voltage is output to the relay or the second voltage is output to the relay, and the voltage output to the relay is also output to the control device as an input signal of the delay self-locking module of the control device. The delay self-locking module of the control device is used for outputting an enable signal after delaying for a certain time (e.g., 50ms) according to the input voltage signal to control the first switch 2031 to be turned off, and at this time, the relay receives the second voltage.
In other embodiments, as shown in conjunction with fig. 4 and 5, the first switch 2031 comprises a fet S1 or a triode; the second switch 2032 comprises a fet S2 or a transistor, and a switch D1 for unidirectional conduction. In the process of driving the relay 30, the first switch 2031 needs to be kept on, and in the process of switching the driving relay to the state of the holding relay, the first switch 2031 also needs to be kept on in the early stage to avoid the relay power failure, and the second switch 2031 needs to be turned on, and after the relay is turned on and stabilized, the first switch 2031 needs to be controlled to be turned off, and then the relay state holding loop is entered, so the first switch 2031 in the present application needs to be a fet S1 or a triode with a control end, meanwhile, the second switch 2032 needs to be a fet S1 or a triode with a control end, and in addition, in the state that the first switch 2031 and the second switch 2032 are turned on simultaneously, the second switch 2032 needs to avoid the circulating current, that is to avoid the first voltage flowing to the second voltage conversion device through the first switch 2031, so the second switch 2032 needs to be a switch with the unidirectional turn-on function.
In a specific embodiment, the control device 204 is connected to the control terminal of the first switch 2301 through the delay output terminal of the control device, and the control device 204 is connected to the control terminal of the second switch 2302 through the real-time output terminal of the control device. In the state from driving the relay to switching to the holding relay, the first switch 2301 needs to be turned off after the second switch 2032 is turned on, that is, the first switch 2031 and the second switch 2032 need to be turned on simultaneously, and how to control the first switch 2301 to be turned off, in this embodiment, a delay scheme of a timer is adopted, and the control device 204 is connected to the control end of the first switch 2301 through the delay output end of the control device to control the turn-off of the first switch 2301. In order to avoid the first voltage breakdown or influence on the unidirectional switch D1 and to ensure that the relay can be switched to the relay state maintaining loop in the first time after the relay is stably operated, the control device 204 is connected to the control terminal of the second switch 2302 through the real-time output terminal of the control device.
Specifically, the first voltage, the second voltage and the power supply voltage may be determined according to the type of the relay, in this embodiment, the power supply voltage range is 9-18V, the first voltage conversion device 201 may output a stable first voltage, the first voltage is generally set to 12 ± 2V, the second voltage conversion device 202 may output a stable second voltage, and the second voltage is generally set to 6 ± 0.5V. The first switch 2301 is used to control whether the first voltage is output to the relay or the second voltage is output to the relay, and the voltage output to the relay is also output to the control device as a real-time output signal of the control device and as an input signal of the delay self-locking module of the control device. The real-time output signal of the control device is used to output an enable signal of the second switch to control the second switch 2032 to be turned on, and at this time, the first switch 2031 and the second switch 2032 are simultaneously turned on. The delay self-locking module of the control device is used for outputting an enable signal of the first switch after delaying for a certain time (e.g., 50ms) according to the input voltage signal to control the first switch 2031 to be turned off, and at this time, the relay receives the second voltage.
In the second embodiment of the present application, as shown in fig. 6, another relay control device 20 'is connected between a power supply 10' and a relay 30 ', and the relay control device 20' includes: the third voltage conversion device 205 ', the switch assembly 203 ' and the control device 204 ', the third voltage conversion device 205 ' is used for converting the voltage of the power supply 10 ' into a third voltage, the switch assembly 203 ' is connected with the third voltage conversion device 205 ', meanwhile, the switch assembly 203 ' is also connected with the power supply 10 ', the input end of the control device 204 ' is connected with the relay 30 ' (collecting the input voltage of the relay 30 '), the output end of the control device 204 ' is connected with the switch assembly 203 ', and the control device 204 ' controls the switch assembly 203 ' to enable the third voltage conversion device 205 ' to form a third loop with the power supply 10 ', the relay 30 ' through the switch assembly 203 ' or enable the power supply 10 ' and the relay 30 ' to form a fourth loop through the switch assembly 203 '.
In the second embodiment of the present application, the switch assembly is provided between the power source and the third voltage conversion device, or the switch assembly 203' is provided between the relay and the third voltage conversion device. As long as the switch assembly enables the relay control device of the present application to form the relay drive circuit and the relay state maintaining circuit.
In the present application, when the third voltage conversion device 205 'is a voltage boosting device, the third circuit formed by the third voltage conversion device 205' and the power source 10 ', the relay 30' through the switch assembly 203 'is a relay driving circuit, and the fourth circuit formed by the power source 10', the relay 30 'through the switch assembly 203' is a relay state maintaining circuit; when the third voltage conversion device 205 'is a step-down device, the third circuit formed by the third voltage conversion device 205' and the power source 10 ', the relay 30' through the switch assembly 203 'is a relay state maintaining circuit, and the fourth circuit formed by the power source 10', the relay 30 'through the switch assembly 203' is a relay driving circuit. The relay control device adopts two independent power supplies to supply power to the relay, namely, the driving voltage for driving the relay to pull in and the holding voltage for holding the relay to pull in are distinguished, so that the relay control device effectively reduces the power supply loss of the relay, reduces the self-heating of a coil of the relay, and simultaneously avoids the problem of EMC.
In a particular embodiment, as shown in fig. 7, the switching assembly 203 ' includes a third switch 2033 ' and a fourth switch 2034 ' connected in parallel, wherein the third switch 2033 ' is connected in series with the third voltage conversion device 205 ' between the power source 10 ' and the relay 30, and the fourth switch 2034 ' is connected between the power source 10 ' and the relay 30 '.
In the present application, during the process of switching the relay driving circuit to the relay state maintaining circuit, the relay cannot be de-energized, and it is required that the relay driving circuit and the relay state maintaining circuit are simultaneously maintained in a communicated state, by connecting the third switch 2033 'in the switch assembly and the third voltage conversion device 205' in series between the power source 10 'and the relay 30, and by connecting the fourth switch 2034' in the switch assembly between the power source 10 'and the relay 30', that is, by controlling the third switch 2033 'and the fourth switch 2034' to simultaneously turn on the relay driving circuit and the relay state maintaining circuit, the problem of de-energizing the relay during the process of switching the relay driving circuit to the relay state maintaining circuit is avoided. Specifically, since the third voltage conversion device 205 ' is provided, the relay driving circuit and the relay state maintaining circuit are simultaneously turned on, the relay receives only the higher of the power supply voltage and the third voltage, and after the relay is stably operated, the third switch 2033 ' and the fourth switch 2034 ' allow only the lower of the power supply voltage and the third voltage to be transmitted to the relay, which realizes both the higher voltage required for the start of the relay and the lower voltage required for the relay maintenance with energy saving and self-heating reduction.
In a specific embodiment, the third voltage conversion device 205 'is a boost device, and the third switch 2033' includes a fet or a transistor; the fourth switch 2034' comprises a unidirectional conducting switch. The third switch 2033 ' is required to be kept on to drive the relay, and after the relay is switched on and stabilized, the relay can be switched to the state of the holding relay from the drive relay, that is, after the relay is stably operated, the third switch 2033 ' needs to be controlled to be switched off to enter a relay state holding loop, so the third switch 2033 ' in the present application needs to be a fet S1 or a triode with a control terminal. Meanwhile, in the process of switching from the driving relay to the holding relay, the third switch 2033 'and the fourth switch 2034' need to be turned on at the same time to prevent the relay from being powered off, so the fourth switch 2034 'needs to prevent a circulating current, that is, the high voltage passing through the third switch 2033' from flowing to the power supply 10 ', that is, the fourth switch 2034' needs to be a switch having a unidirectional conduction function.
In a specific embodiment, the control device 204 ' is connected to the control terminal of the third switch 2033 ' through the delay output terminal of the control device 204 '. In the state from driving the relay to switching to the holding relay, the third switch 2033 'needs to be turned off after the fourth switch 2034' is turned on, that is, a state where the third switch 2033 'and the fourth switch 2034' need to be turned on simultaneously, how to control the third switch 2033 'to be turned off is adopted in this embodiment, a delay scheme of a timer is adopted, and the control device 204' is connected to the control terminal of the third switch 2033 'through the delay output terminal of the control device to control the turn-off of the third switch 2033'.
Specifically, the third voltage and the power supply voltage may be determined according to the type of the relay, and in this embodiment, the range of the power supply voltage is 6 ± 0.5V, and the third voltage is 12 ± 2V. The third switch 2033' is used to control whether the third voltage is output to the relay or the power voltage is output to the relay, and the voltage output to the relay is also output to the control device as an input signal of the delay self-locking module of the control device. The delay self-locking module of the control device is used for outputting an enable signal of the third switch after delaying for a certain time (for example, 50ms) according to the input voltage signal so as to control the third switch 2033' to be switched off, and at the moment, the relay receives the power supply voltage.
In other embodiments, the third voltage conversion device is a step-down device, and the third switch comprises a unidirectional conducting switch; the fourth switch comprises a field effect transistor or a triode. The drive relay needs the fourth switch to keep switching on, after the relay switch-on is stabilized, just can switch to the state that keeps relay from the drive relay, promptly after the relay steady operation, need control the fourth switch and turn off, enters into relay state and keeps the return circuit, so the fourth switch in this application needs be field effect transistor or the triode that has the control end. Meanwhile, during switching from the driving relay to the holding relay, the third switch and the fourth switch need to be simultaneously turned on to avoid power failure of the relay, so the third switch needs to avoid circulating current, that is, to avoid high voltage passing through the fourth switch from flowing to the third voltage conversion device, that is, the third switch needs to be a switch having a one-way conduction function.
In a specific embodiment, the control device is connected to the control terminal of the fourth switch through the delay output terminal of the control device. In the embodiment, a delay scheme of a timer is adopted, and the control device is connected with the control end of the fourth switch through the delay output end of the control device so as to control the turn-off of the fourth switch.
Specifically, the third voltage and the power supply voltage may be determined according to the type of the relay, and in this embodiment, the power supply voltage range is 12 ± 2V, and the third voltage is 6 ± 0.5V. The fourth switch is used for controlling whether the third voltage is output to the relay or the power supply voltage is output to the relay, and meanwhile, the voltage output to the relay is also output to the control device and serves as an input signal of the time delay self-locking module of the control device. The time-delay self-locking module of the control device is used for outputting an enabling signal of the fourth switch after delaying for a certain time (such as 50ms) according to the input voltage signal so as to control the fourth switch to be switched on and off, and the relay receives the third voltage at the moment.
In other embodiments, as shown in fig. 8, the third voltage conversion device 205 'is a boost device, and the third switch 2033' comprises a fet or a triode; the fourth switch 2034' comprises a fet or a transistor, and a unidirectional switch. The drive relay 30 'requires the third switch 2033' to remain on, and during the switching of the drive relay to the state of the hold relay, the earlier third switch 2033 'is also required to be kept on to avoid the relay being de-energized, while the fourth switch 2034' is to be turned on, after the relay is turned on and stabilized, the third switch 2033' needs to be controlled to be turned off, a relay state maintaining loop is entered, the third switch 2033' in this application needs to be a fet or a transistor with a control terminal, and at the same time, the fourth switch 2034' needs to be a fet or a transistor having a control terminal, and further, in a state where the third switch 2033 ' and the fourth switch 2034 ' are simultaneously turned on, the fourth switch 2034 ' needs to avoid a circulating current, i.e., to prevent the higher voltage from flowing to the power supply through the third switch 2033 ', the fourth switch 2034' needs to be a switch with a unidirectional conduction function.
In a specific embodiment, the control device 204 'is connected to the control terminal of the third switch 2033' through the delay output terminal of the control device, and the control device 204 'is connected to the control terminal of the fourth switch 2034' through the real-time output terminal of the control device. In the state from driving the relay to switching to the holding relay, the third switch 2033 'needs to be turned off after the fourth switch 2034' is turned on, that is, a state where the third switch 2033 'and the fourth switch 2034' need to be turned on simultaneously, how to control the third switch 2033 'to be turned off is adopted in this embodiment, a delay scheme of a timer is adopted, and the control device 204' is connected to the control terminal of the third switch 2033 'through the delay output terminal of the control device to control the turn-off of the third switch 2033'. In order to avoid the breakdown or influence of the unidirectional switch by the third voltage output by the third voltage conversion device, and to ensure that the relay can be switched to the relay state maintaining loop at the first time after the relay stably operates, the control device 204 ' is connected to the control end of the fourth switch 2034 ' through the real-time output end of the control device, that is, the control device 204 ' is connected to the control end of the fet or the triode through the real-time output end of the control device.
Specifically, the third voltage and the power supply voltage may be determined according to the type of the relay, and in this embodiment, the range of the power supply voltage is 6 ± 0.5V, and the third voltage is 12 ± 2V. The third switch 2033' is used to control whether the third voltage is output to the relay or the power voltage is output to the relay, and the voltage output to the relay is also output to the control device as a real-time output signal of the control device and as an input signal of the delay self-locking module of the control device. The real-time output signal of the control device is used to output an enable signal of the fourth switch to control the fourth switch 2034 ' to be turned on, and at this time, the third switch 2033 ' and the fourth switch 2034 ' are simultaneously in a turned-on state. The delay self-locking module of the control device is used for outputting an enable signal of the third switch after delaying for a certain time (for example, 50ms) according to the input voltage signal so as to control the third switch 2033' to be switched off, and at the moment, the relay receives the power supply voltage.
In other embodiments, the third voltage conversion device is a step-down device, and the third switch comprises a fet or a triode, and a unidirectional switch; the fourth switch comprises a field effect transistor or a triode. The third switch needs to be a field effect transistor or a triode with a control end, and meanwhile, the third switch needs to be a field effect transistor or a triode with a control end, in addition, in the state that the third switch and the fourth switch are simultaneously switched on, the third switch needs to avoid circulation, namely, the higher voltage flowing through the fourth switch is prevented from flowing to the third voltage conversion device, so the third switch needs to be a switch with a one-way conduction function.
In a specific embodiment, the control device is connected to the control terminal of the fourth switch through the delay output terminal of the control device, and the control device is connected to the control terminal of the third switch through the real-time output terminal of the control device. In the embodiment, a delay scheme of a timer is adopted, and the control device is connected with the control end of the fourth switch through the delay output end of the control device so as to control the fourth switch to be switched off. In order to avoid the breakdown of power voltage or the influence on the one-way conduction switch, and simultaneously ensure that the relay can be switched to a relay state maintaining loop at the first time after the relay works stably, the control device is connected with the control end of the third switch through the real-time output end of the control device, namely the control device is connected with the control end of the field effect transistor or the triode through the real-time output end of the control device.
Specifically, the third voltage and the power supply voltage may be determined according to the type of the relay, and in this embodiment, the power supply voltage range is 12 ± 2V, and the third voltage is 6 ± 0.5V. The fourth switch is used for controlling whether the third voltage is output to the relay or the power supply voltage is output to the relay, and meanwhile, the voltage output to the relay can also be output to the control device and used as a real-time output signal of the control device and an input signal of a delay self-locking module of the control device. The real-time output signal of the control device is used for outputting an enabling signal of the third switch to control the third switch to be conducted, and the third switch and the fourth switch are simultaneously in a conducting state. The time-delay self-locking module of the control device is used for outputting an enabling signal of the fourth switch after delaying for a certain time (such as 50ms) according to the input voltage signal so as to control the fourth switch to be switched on and off, and the relay receives the third voltage at the moment.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill 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 application and are intended to be included within the scope of the present application.
Claims (10)
1. A relay control apparatus, characterized by comprising:
a first voltage conversion device that converts a voltage of a power supply into a first voltage;
second voltage conversion means for converting a voltage of the power supply into a second voltage, the first voltage being greater than the second voltage;
a switch assembly connected with the first voltage conversion device and connected with the second voltage conversion device;
the input end of the control device is connected with the relay, the output end of the control device is connected with the switch assembly, and the switch assembly is controlled to enable the first voltage conversion device and the power supply or the relay to form a relay driving loop through the switch assembly or enable the second voltage conversion device and the power supply or the relay to form a relay state maintaining loop through the switch assembly.
2. The relay control apparatus of claim 1, wherein the switch assembly comprises a first switch and a second switch connected in parallel, the first switch connected in series with the first voltage conversion device between the power source and the relay, the second switch connected in series with the second voltage conversion device between the power source and the relay.
3. The relay control apparatus of claim 2, wherein the first switch comprises a field effect transistor or a triode; the second switch comprises a unidirectional conducting switch.
4. The relay control device of claim 3, wherein the control device is coupled to the control terminal of the first switch via a delay output of the control device.
5. The relay control apparatus of claim 2, wherein the first switch comprises a field effect transistor or a triode; the second switch comprises a field effect transistor or a triode and a one-way conduction switch.
6. The relay control device of claim 5, wherein the control device is coupled to the control terminal of the first switch via a delay output of the control device, and wherein the control device is coupled to the control terminal of the second switch via a real-time output of the control device.
7. A relay control apparatus, characterized by comprising:
third voltage conversion means for converting a voltage of the power supply into a third voltage;
a switch assembly connected with the third voltage conversion device;
the input end of the control device is connected with the relay, the output end of the control device is connected with the switch assembly, and the switch assembly is controlled to enable the third voltage conversion device and the power supply or the relay to form a third loop through the switch assembly or enable the power supply and the relay to form a fourth loop through the switch assembly.
8. The relay control apparatus of claim 7, wherein the switch assembly comprises a third switch and a fourth switch connected in parallel, the third switch connected in series with the third voltage conversion device between the power source and the relay, the fourth switch connected between the power source and the relay.
9. The relay control apparatus of claim 8, wherein the third voltage converting means is a step-up means, and the third switch comprises a fet or a triode; the fourth switch comprises a unidirectional conducting switch; the control device is connected with the control end of the third switch through the delay output end of the control device; alternatively, the first and second electrodes may be,
the third voltage conversion device is a voltage reduction device, and the third switch comprises a one-way conduction switch; the fourth switch comprises a field effect transistor or a triode; and the control device is connected with the control end of the fourth switch through the delay output end of the control device.
10. The relay control apparatus of claim 8, wherein the third voltage converting means is a step-up means, and the third switch comprises a fet or a triode; the fourth switch comprises a field effect transistor or a triode and a one-way conduction switch; the control device is connected with the control end of the third switch through a delay output end of the control device, and the control device is connected with the control end of the fourth switch through a real-time output end of the control device; alternatively, the first and second electrodes may be,
the third voltage conversion device is a voltage reduction device, and the third switch comprises a field effect transistor or a triode and a one-way conduction switch; the fourth switch comprises a field effect transistor or a triode; the control device is connected with the control end of the fourth switch through the delay output end of the control device, and the control device is connected with the control end of the third switch through the real-time output end of the control device.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117080018A (en) * | 2023-09-27 | 2023-11-17 | 德力西电气有限公司 | Contactor coil control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117080018A (en) * | 2023-09-27 | 2023-11-17 | 德力西电气有限公司 | Contactor coil control system |
| CN117080018B (en) * | 2023-09-27 | 2024-01-19 | 德力西电气有限公司 | Contactor coil control system |
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