CN216490438U - Control circuit of switching device and circuit breaker - Google Patents
Control circuit of switching device and circuit breaker Download PDFInfo
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- CN216490438U CN216490438U CN202122655547.3U CN202122655547U CN216490438U CN 216490438 U CN216490438 U CN 216490438U CN 202122655547 U CN202122655547 U CN 202122655547U CN 216490438 U CN216490438 U CN 216490438U
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Abstract
The utility model provides a control circuit of a switching device and a breaker, and relates to the field of circuits. The method comprises the following steps: the device comprises an isolation module, a control switch, a first switch device, a second switch device, a first coil and a second coil; the input end of the isolation module is connected with the control signal input end, the first output end of the isolation module is connected with the first end of the first switch device, and the second output end of the isolation module is connected with the first end of the second switch device; the control switch is connected with the isolation module, the first switch device and the second switch device; the second end of the first switching device is connected with one end of the first coil, and the other end of the first coil is used for connecting the positive electrode of the power supply; and the second end of the second switching device is connected with one end of the second coil, and the other end of the second coil is used for being connected with the positive electrode of the power supply. Through setting up isolation module, first switching device, second switching device, first coil, second coil, avoid the maloperation after separating brake, combined floodgate, reliable control switching device carries out separating brake, combined floodgate.
Description
Technical Field
The utility model relates to the technical field of circuits, in particular to a control circuit of a switching device and a circuit breaker.
Background
With the rapid development of technology, various electronic devices are increasing. In some electronic devices, control of opening and closing of a switching device is generally involved, and accurate control of opening and closing of the switching device is a research focus.
In the related art, an opening control signal or a closing control signal directly acts on a switching device, the opening of the switching device is controlled according to the opening control signal, and the closing of the switching device is controlled according to the closing control signal.
However, in the related art, the switching-on/off control signal directly controls the switching device, and after the switching-on/off of the switching device is controlled, the switching-on/off state of the switching device is easily changed by misoperation.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a control circuit of a switching device and a circuit breaker aiming at the defects in the prior art, and solves the problem that in the related art, an opening and closing control signal directly controls the switching device, and the opening and closing state of the switching device is easily changed by misoperation after the switching device is controlled to be opened or closed.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:
in a first aspect, an embodiment of the present invention provides a control circuit for a switching device, including: the device comprises an isolation module, a control switch, a first switch device, a second switch device, a first coil and a second coil;
the input end of the isolation module is used for being connected with a control signal input end, the first output end of the isolation module is connected with the first end of the first switching device, and the second output end of the isolation module is connected with the first end of the second switching device; the control switch is connected with the isolation module, the first switch device and the second switch device;
the second end of the first switching device is connected with one end of the first coil, and the other end of the first coil is used for being connected with the positive electrode of a power supply; a second end of the second switch device is connected with one end of the second coil, and the other end of the second coil is used for being connected with a power supply anode; when a positive signal is input at the control signal input end, the isolation module is used for conducting a control signal to the first switching device so as to control the first switching device to be switched off by controlling the control switch through the current flowing through the first coil; when a negative signal is input to the control signal input end, the isolation module is used for conducting a control signal to the second switching device so as to control the control switch to be switched off by the current flowing through the second coil.
Optionally, the isolation module includes: the first optical coupling unit and the second optical coupling unit;
the input end of the first optical coupling unit and the input end of the second optical coupling unit are both used for being connected with a control signal input end, the first output end of the first optical coupling unit is connected with the first end of the first switch device, and the first output end of the second optical coupling unit is connected with the first end of the second switch device.
Optionally, the first optical coupling unit includes: the circuit comprises a first optocoupler device, a first resistor and a first diode; one end of the first resistor is used for being connected with a positive signal end of the control signal input end, the other end of the first resistor is connected with a first input end of the first optical coupler, a second input end of the first optical coupler is connected with an input end of the first diode, and an output end of the first diode is used for being connected with a negative signal end of the control signal input end.
Optionally, a second output end of the first optical coupling unit is connected to a second output end of the second optical coupling unit;
and the second output end of the first optical coupling unit is connected with the positive electrode of the power supply through a second resistor.
Optionally, the first output end of the first optical coupling unit is grounded through a third resistor; and the first output end of the second optical coupling unit is grounded through a fourth resistor.
Optionally, the method further includes: a third diode;
one end of the fourth resistor is connected with the first output end of the first optocoupler unit, the other end of the fourth resistor is connected with the input end of the third diode, and the output end of the third diode is used for being connected with the negative electrode of the power supply.
Optionally, the second terminal of the first switching device and the second terminal of the second switching device are connected to the control terminal of the control switch; the first access end and the second access end of the control switch are respectively connected with the first end of the first switching device and the first end of the second switching device;
when a positive signal is input at the control signal input end, the isolation module is used for conducting a control signal to the first switching device so as to control the control end of the control switch to be connected with the second access end of the control switch and switch off the first switching device through the current flowing through the first coil; when the control signal input end inputs a negative signal, the isolation module is used for conducting the control signal to the second switch device so as to control the control end of the control switch to be connected with the first access end of the control switch and switch off the second switch device through the current flowing through the second coil.
Optionally, the control switch is applied to a circuit breaker;
when a positive signal is input at the control signal input end, the isolation module is used for conducting a control signal to the first switching device so as to control the circuit breaker handle to drive the control end of the control switch to be connected with the second access end of the control switch and switch off the first switching device through a magnetic field generated by current flowing through the first coil;
when the control signal input end inputs a negative signal, the isolation module is used for conducting the control signal to the second switch device so as to control the circuit breaker handle to drive the control end of the control switch to be connected with the first access end of the control switch and turn off the second switch device through a magnetic field generated by the current flowing through the second coil.
Optionally, the first switching device and the second switching device are both MOS transistors;
a first output end of the isolation module is connected with a grid electrode of the first switching device, one end of the first coil is connected with a source electrode of the first switching device, and a control end of the control switch is connected with a drain electrode of the first switching device;
the second output end of the isolation module is connected with the grid electrode of the second switch device, one end of the second coil is connected with the source electrode of the second switch device, and the control end of the control switch is connected with the drain electrode of the second switch device.
In a second aspect, an embodiment of the present invention further provides a circuit breaker, including a control circuit of the switching device according to any one of the first aspects.
The utility model has the beneficial effects that: an embodiment of the present invention provides a control circuit of a switching device, including: the device comprises an isolation module, a control switch, a first switch device, a second switch device, a first coil and a second coil; the input end of the isolation module is used for being connected with the control signal input end, the first output end of the isolation module is connected with the first end of the first switch device, and the second output end of the isolation module is connected with the first end of the second switch device; the control switch is connected with the isolation module, the first switch device and the second switch device; the second end of the first switching device is connected with one end of the first coil, and the other end of the first coil is used for connecting the positive electrode of the power supply; the second end of the second switch device is connected with one end of the second coil, and the other end of the second coil is used for being connected with the positive electrode of the power supply; when a positive signal is input at the control signal input end, the isolation module is used for conducting the control signal to the first switching device so as to control the first switching device to be switched off by the current control switch flowing through the first coil; when the control signal input end inputs a negative signal, the isolation module is used for conducting the control signal to the second switching device so as to control the second switching device to be switched off by the control switch of the current flowing through the second coil. Through setting up isolation module, first switching device, second switching device, first coil, second coil, can effectively realize separating brake, combined floodgate, moreover, can also in time control corresponding switching device in time and turn off after separating brake, combined floodgate, realize the interlocking, avoid the maloperation after separating brake, combined floodgate, reliable control switching device carries out separating brake, combined floodgate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a control circuit of a switching device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a control circuit of a switching device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a control circuit of a switching device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a control circuit of a switching device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Fig. 1 is a schematic structural diagram of a control circuit of a switching device according to an embodiment of the present invention, and as shown in fig. 1, the control circuit of the switching device includes: the circuit comprises an isolation module 101, a control switch 102, a first switching device 103, a second switching device 104, a first coil 105 and a second coil 106.
The input end of the isolation module 101 is used for being connected with the control signal input end 107, the first output end of the isolation module 101 is connected with the first end of the first switching device 103, and the second output end of the isolation module 101 is connected with the first end of the second switching device 104; the control switch 102 is connected with the isolation module 101, the first switching device 103 and the second switching device 104;
in addition, a second end of the first switching device 103 is connected to one end of the first coil 105, and the other end of the first coil 105 is used for connecting a power supply anode; a second end of the second switching device 104 is connected to one end of the second coil 106, and the other end of the second coil 106 is used for connecting a positive electrode of a power supply; when a positive signal is input at the control signal input end 107, the isolation module 101 is configured to turn on a control signal to the first switching device 103, so as to control the first switching device 103 to turn off by the first coil 105 flowing through the current control switch 102; when the control signal input terminal 107 inputs a negative signal, the isolation module 101 is configured to turn on the control signal to the second switching device 104, so as to control the second switching device 104 to turn off by the second coil 106 flowing through the current control switch 102.
The positive signal may be a positive voltage, the negative signal may be a negative voltage, and the control signal may be a current signal.
In some embodiments, the control signal input end 107 inputs a positive signal, and then the isolation module 101 is turned on to transmit the control signal to the first switching device 103, so that the first switching device 103 is in an on state, a large current flows through the first coil 105 connected to the first switching device 103, the switch 102 device can be controlled to be switched on by the first coil 105, and meanwhile, the state of the switch 102 can be controlled by the first coil 105, and then the first switching device 103 is turned off.
In the embodiment of the present application, the isolation module 101 triggers the first switching device 103, the first coil 105 flows through current, and therefore switching on of the switching device can be effectively achieved, meanwhile, the first coil 105 flows through current, and the first switching device 103 can be controlled to be turned off in time by controlling the control switch 102, so that accurate and reliable switching on is ensured, and operation after switching on is avoided.
In other embodiments, the control signal input end 107 inputs a negative signal, and then the isolation module 101 is turned on to transmit the control signal to the second switching device 104, so that the second switching device 104 is in an on state, a large current flows through the second coil 106 connected to the second switching device 104, the second coil 106 can control the switching-off of the switch 102, and meanwhile, the second coil 106 can control the state of the control switch 102, and then the second switching device 104 is turned off.
Similarly, the second switch device 104 is triggered by the isolation module 101, and the second coil 106 flows through current, so that the switching-off of the switch device can be effectively realized, and meanwhile, the second coil 106 flows through current, so that the second switch device 104 can be controlled to be turned off in time by controlling the control switch 102, thereby ensuring accurate and reliable switching-off and avoiding the operation after switching-off.
It should be noted that the isolation module 101 may be used to isolate the main loop from the control loop. Optionally, the isolation module 101 may be an optical coupling isolation module, and certainly, the isolation module 101 may also be a module capable of playing an isolation role in other types, which is not specifically limited in this embodiment of the application.
In summary, an embodiment of the present application provides a control circuit of a switching device, including: the device comprises an isolation module, a control switch, a first switch device, a second switch device, a first coil and a second coil; the input end of the isolation module is used for being connected with the control signal input end, the first output end of the isolation module is connected with the first end of the first switch device, and the second output end of the isolation module is connected with the first end of the second switch device; the control switch is connected with the isolation module, the first switch device and the second switch device; the second end of the first switching device is connected with one end of the first coil, and the other end of the first coil is used for connecting the positive electrode of the power supply; the second end of the second switch device is connected with one end of the second coil, and the other end of the second coil is used for being connected with the positive electrode of the power supply; when a positive signal is input at the control signal input end, the isolation module is used for conducting the control signal to the first switching device so as to control the first switching device to be switched off by the current control switch flowing through the first coil; when the control signal input end inputs a negative signal, the isolation module is used for conducting the control signal to the second switching device so as to control the second switching device to be switched off by the control switch of the current flowing through the second coil. Through setting up isolation module, first switching device, second switching device, first coil, second coil, can effectively realize separating brake, combined floodgate, moreover, can also in time control corresponding switching device in time and turn off after separating brake, combined floodgate, realize the interlocking, avoid the maloperation after separating brake, combined floodgate, reliable control switching device carries out separating brake, combined floodgate.
Optionally, fig. 2 is a schematic structural diagram of a control circuit of a switching device according to an embodiment of the present invention, and as shown in fig. 2, the isolation module 101 may include: a first optical coupler unit 1011 and a second optical coupler unit 1012. The input ends of the first optical coupling unit 1011 and the second optical coupling unit 1012 are both used for being connected with the control signal input end 107, the first output end of the first optical coupling unit 1011 is connected with the first end of the first switch device 103, and the first output end of the second optical coupling unit 1012 is connected with the first end of the second switch device 104.
It should be noted that when the control signal input end 107 inputs a positive signal, the first optical coupler unit 1011 is turned on, and then the first optical coupler unit 1011 turns on the control signal to the first switching device 103, so that the first coil 105 flows through a current. In addition, when a negative signal is input to the control signal input end 107, the second optical coupling unit 1012 is turned on, and then the second optical coupling unit 1012 conducts the control signal to the second switching device 104, so that a current flows through the second coil 106.
Optionally, fig. 3 is a schematic structural diagram of a control circuit of a switching device according to an embodiment of the present invention, and as shown in fig. 3, the first optical coupler unit 1011 may include: the circuit comprises a first optical coupler U1, a first resistor R1 and a first diode D1.
One end of the first resistor R1 is used for being connected with the positive signal end a of the control signal input end 107, the other end of the first resistor R1 is connected with the first input end of the first optocoupler U1, the second input end of the first optocoupler U1 is connected with the input end of the first diode D1, and the output end of the first diode D1 is used for being connected with the negative signal end B of the control signal input end 107.
In the embodiment of the present application, a positive signal is input to the positive signal terminal a of the control signal input terminal 107, and the control signal passes through the first resistor R1 and the first optical coupler device U1, so that the first optical coupler device U1 is turned on. The control signal may be a current signal.
In addition, the resistance of the first resistor R1 can be set according to actual requirements, for example, the resistance of the first resistor R1 can be 5.1 kilo-ohms.
Alternatively, as shown in fig. 3, the second light coupling unit 1012 may include: the second optical coupler device U2, a fifth resistor R5 and a second diode D2.
One end of the fifth resistor R5 is used for being connected with the negative signal end B of the control signal input end 107, the other end of the fifth resistor R5 is connected with the first input end of the second optocoupler U2, the second input end of the second optocoupler U2 is connected with the input end of the second diode D2, and the output end of the second diode D2 is used for being connected with the positive signal end a of the control signal input end 107.
In the embodiment of the present application, a positive signal is input to the negative signal terminal B of the control signal input terminal 107, and the control signal passes through the fifth resistor R5 and the second optical coupler U2, so that the second optical coupler U2 is turned on. The control signal may be a current signal.
In addition, the resistance of the fifth resistor R5 can be set according to actual requirements, for example, the resistance of the fifth resistor R5 can be 5.1 kilo-ohms.
It should be noted that the diode has unidirectional conductivity, and can protect the optocoupler bearing reverse voltage correspondingly.
Optionally, as shown in fig. 3, a second output end of the first optical coupler unit 1011 is connected to a second output end of the second optical coupler unit 1012; the second output end of the first optical coupler unit 1011 is connected to the positive electrode + U of the power supply through a second resistor R2.
The second resistor R2 may be used for voltage division, and the number of the second resistors R2 may be one resistor or a plurality of resistors connected in series, which is not limited in this embodiment of the application.
It should be noted that, after the first optical coupler unit 1011 is turned on, the voltage of the positive electrode + U of the power supply may be output to the first switching device 103, and in order to enable the voltage value output to the first switching device 103 to meet the condition, the second resistor R2 with a proper resistance may be set to divide the voltage, so as to avoid the problem of too large voltage output to the first switching device 103.
In addition, the resistance of the second resistor R1 can be set according to actual requirements, for example, the resistance of the second resistor R1 can be 20 kilo-ohms.
Optionally, the first output end of the first optical coupler unit 1011 is grounded through a third resistor R3; a first output terminal of the second optical coupling unit 1012 is grounded through a fourth resistor R4.
In some embodiments, after the first optical coupler unit 1011 is turned on, the second resistor R2 divides the voltage of the positive electrode + U of the power supply, and a part of the main loop voltage divided by the third resistor R3 is output to the first switching device 103.
After the second optical coupler unit 1012 is turned on, the second resistor R2 divides the voltage of the positive electrode + U of the power supply, and a part of the main circuit voltage divided by the fourth resistor R4 is output to the second switching device 104.
Optionally, fig. 4 is a schematic structural diagram of a control circuit of a switching device according to an embodiment of the present invention, and as shown in fig. 4, the control circuit may further include: and a third diode D3.
One end of the fourth resistor R4 is connected to the first output end of the first optical coupler unit 1011, the other end of the fourth resistor R4 is connected to the input end of the third diode D3, and the output end of the third diode D3 may be used to connect to the power supply cathode-U.
In the embodiment of the present application, the third diode D3 is connected between the fourth resistor R4 and the negative electrode-U of the power supply, and when the user connects the positive and negative electrodes of the power supply in a wrong way, for example, when the output terminal of the third diode D3 is connected to the positive electrode + U of the power supply, the diode has a one-way conductivity, and the third diode D3 can be turned off in time, so as to avoid the damage to the control circuit when the positive and negative electrodes of the power supply are connected in a wrong way, and protect the control circuit.
Optionally, a second terminal of the first switching device 103 and a second terminal of the second switching device 104 are connected to a control terminal of the control switch 102; a first input end and a second input end of the control switch 102 are respectively connected to a first end of the first switching device 103 and a first end of the second switching device 104.
When a positive signal is input to the control signal input end 107, the isolation module 101 is configured to turn on the control signal to the first switching device 103, so that the control end 1 of the current control switch 102 flows through the first coil 105 to be connected to the second access end 3 of the control switch 102, and the first switching device 103 is turned off; when a negative signal is input at the control signal input terminal 107, the isolation module 101 is configured to turn on the control signal to the second switching device 104, so that the control terminal of the control switch 102 is switched to be connected to the first input terminal 2 of the control switch 102 and the second switching device 104 is turned off by the second coil 106 flowing through the current control switch 102.
In some embodiments, when a positive signal is input at the control signal input terminal 107, the isolation module 101 turns on the control signal to the first switching device 103, the first switching device 103 is turned on, the first coil 105 flows through the control terminal of the current control switch 102 and is switched from the first access terminal 2 of the control switch 102 to the second access terminal 3 of the control switch 102, then the control terminal of the control switch 102 is connected to the second access terminal 3, and the first switching device 103 is turned off.
In some embodiments, when a negative signal is input at the control signal input terminal 107, the isolation module 101 turns on the control signal to the second switching device 104, the second switching device 104 is turned on, the second coil 106 flows through the control terminal of the current control switch 102 and is switched from the second access terminal 3 of the control switch 102 to the first access terminal 2 of the control switch 102, and then the control terminal of the control switch 102 is connected to the first access terminal 2, and the second switching device 104 is turned off.
Alternatively, the control switch 102 may be applied to a circuit breaker;
when a positive signal is input to the control signal input end 107, the isolation module 101 is configured to conduct the control signal to the first switching device 103, so that a magnetic field generated by a current flowing through the first coil 105 controls the circuit breaker handle to drive the control end of the control switch 102 to be connected to the second access end of the control switch 102, and the first switching device 103 is turned off; when a negative signal is input at the control signal input end 107, the isolation module 101 is configured to conduct the control signal to the second switching device 104, so that the magnetic field generated by the current flowing through the second coil 106 controls the circuit breaker handle to drive the control end of the control switch 102 to be connected to the first access end of the control switch 102, and the second switching device 104 is turned off.
In this embodiment, when the first coil 105 flows through the current, the first coil 105 generates a magnetic field, and drives the handle to move under the action of the magnetic field, so that the switching device is switched on, and meanwhile, the handle drives the control end of the control switch 102 to be connected to the second connection end 3 of the control switch 102, thereby turning off the first switching device 103.
Similarly, when the current flows through the second coil 106, the second coil 106 generates a magnetic field, and drives the handle to move under the action of the magnetic field, so that the switch device is switched off, and meanwhile, the handle drives the control end of the control switch 102 to be connected with the first access end 2 of the control switch 102, thereby turning off the second switch device 104.
Optionally, the control switch 102 may include: a micro switch. The microswitch is used for quickly cutting off power, protecting the coil and the device and realizing the interlocking of two states of switching on and switching off. The control of small signals is realized, and the service life of the micro switch is prolonged by a non-main loop.
Optionally, the first switching device 103 and the second switching device 104 are both MOS transistors.
As shown in fig. 4, a first output end of the isolation module 101 is connected to a gate of the first switching device 103, one end of the first coil 105 is connected to a source of the first switching device 103, and a control end of the control switch 102 is connected to a drain of the first switching device 103; a second output terminal of the isolation module 101 is connected to the gate of the second switching device 104, one terminal of the second coil 106 is connected to the source of the second switching device 104, and a control terminal of the control switch 102 is connected to the drain of the second switching device 104.
In the embodiment of the present application, the first switching device 103 and the second switching device 104 are configured as MOS transistors, so that the volume of the control circuit can be smaller.
The embodiment of the utility model provides a circuit breaker, which comprises the control circuit of the switching device.
The specific structure of the circuit breaker refers to the embodiment of the control circuit of the switching device, and the circuit breaker adopts the technical solutions of all the embodiments of the switching device, so that the circuit breaker at least has all the beneficial effects brought by the technical solutions of the embodiments, and the details are not repeated herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A control circuit for a switching device, comprising: the device comprises an isolation module, a control switch, a first switch device, a second switch device, a first coil and a second coil;
the input end of the isolation module is used for being connected with a control signal input end, the first output end of the isolation module is connected with the first end of the first switching device, and the second output end of the isolation module is connected with the first end of the second switching device; the control switch is connected with the isolation module, the first switch device and the second switch device;
the second end of the first switching device is connected with one end of the first coil, and the other end of the first coil is used for being connected with the positive electrode of a power supply; a second end of the second switch device is connected with one end of the second coil, and the other end of the second coil is used for being connected with a power supply anode; when a positive signal is input at the control signal input end, the isolation module is used for conducting a control signal to the first switching device so as to control the first switching device to be switched off by controlling the control switch through the current flowing through the first coil; when a negative signal is input to the control signal input end, the isolation module is used for conducting a control signal to the second switching device so as to control the control switch to be switched off by the current flowing through the second coil.
2. The control circuit of claim 1, wherein the isolation module comprises: the first optical coupling unit and the second optical coupling unit;
the input end of the first optical coupling unit and the input end of the second optical coupling unit are both used for being connected with a control signal input end, the first output end of the first optical coupling unit is connected with the first end of the first switch device, and the first output end of the second optical coupling unit is connected with the first end of the second switch device.
3. The control circuit of claim 2, wherein the first light coupling unit comprises: the circuit comprises a first optocoupler device, a first resistor and a first diode; one end of the first resistor is used for being connected with a positive signal end of the control signal input end, the other end of the first resistor is connected with a first input end of the first optical coupler, a second input end of the first optical coupler is connected with an input end of the first diode, and an output end of the first diode is used for being connected with a negative signal end of the control signal input end.
4. The control circuit of claim 2, wherein the second output terminal of the first optical coupler unit is connected to the second output terminal of the second optical coupler unit;
and the second output end of the first optical coupling unit is connected with the positive electrode of the power supply through a second resistor.
5. The control circuit of claim 2, wherein the first output terminal of the first optical coupling unit is grounded through a third resistor; and the first output end of the second optical coupling unit is grounded through a fourth resistor.
6. The control circuit of claim 5, further comprising: a third diode;
one end of the fourth resistor is connected with the first output end of the first optocoupler unit, the other end of the fourth resistor is connected with the input end of the third diode, and the output end of the third diode is used for being connected with the negative electrode of the power supply.
7. The control circuit of claim 1, wherein the second terminal of the first switching device and the second terminal of the second switching device are connected to the control terminal of the control switch; the first access end and the second access end of the control switch are respectively connected with the first end of the first switching device and the first end of the second switching device;
when a positive signal is input at the control signal input end, the isolation module is used for conducting a control signal to the first switching device so as to control the control end of the control switch to be connected with the second access end of the control switch and switch off the first switching device through the current flowing through the first coil; when the control signal input end inputs a negative signal, the isolation module is used for conducting the control signal to the second switch device so as to control the control end of the control switch to be connected with the first access end of the control switch and switch off the second switch device through the current flowing through the second coil.
8. The control circuit of claim 7, wherein the control switch is applied to a circuit breaker;
when a positive signal is input at the control signal input end, the isolation module is used for conducting a control signal to the first switching device so as to control the circuit breaker handle to drive the control end of the control switch to be connected with the second access end of the control switch and switch off the first switching device through a magnetic field generated by current flowing through the first coil;
when the control signal input end inputs a negative signal, the isolation module is used for conducting the control signal to the second switch device so as to control the handle of the circuit breaker to drive the control end of the control switch to be connected with the first access end of the control switch and turn off the second switch device through a magnetic field generated by the current flowing through the second coil.
9. The control circuit according to any one of claims 1 to 8, wherein the first switching device and the second switching device are both MOS transistors;
a first output end of the isolation module is connected with a grid electrode of the first switching device, one end of the first coil is connected with a source electrode of the first switching device, and a control end of the control switch is connected with a drain electrode of the first switching device;
the second output end of the isolation module is connected with the grid electrode of the second switch device, one end of the second coil is connected with the source electrode of the second switch device, and the control end of the control switch is connected with the drain electrode of the second switch device.
10. A circuit breaker characterized by a control circuit comprising a switching device according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122655547.3U CN216490438U (en) | 2021-11-01 | 2021-11-01 | Control circuit of switching device and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122655547.3U CN216490438U (en) | 2021-11-01 | 2021-11-01 | Control circuit of switching device and circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216490438U true CN216490438U (en) | 2022-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122655547.3U Active CN216490438U (en) | 2021-11-01 | 2021-11-01 | Control circuit of switching device and circuit breaker |
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| Country | Link |
|---|---|
| CN (1) | CN216490438U (en) |
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2021
- 2021-11-01 CN CN202122655547.3U patent/CN216490438U/en active Active
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