CN218568732U - Control circuit of high-voltage relay, high-voltage relay and power supply system - Google Patents
Control circuit of high-voltage relay, high-voltage relay and power supply system Download PDFInfo
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- CN218568732U CN218568732U CN202222192278.6U CN202222192278U CN218568732U CN 218568732 U CN218568732 U CN 218568732U CN 202222192278 U CN202222192278 U CN 202222192278U CN 218568732 U CN218568732 U CN 218568732U
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Abstract
The utility model relates to a high voltage relay's control circuit, high voltage relay and power supply system, control circuit includes: the positive electrode of the first diode D1 is connected with a low-voltage power supply, and the negative electrode of the first diode D1 is connected with the first end A of the electromagnet coil of the high-voltage relay; one end of the capacitor C1 is connected to the negative electrode of the first diode D1 and the first end A of the electromagnet coil of the high-voltage relay, and the other end of the capacitor C1 is grounded; and the control end of the switch tube is connected to the control unit, one end of the switch tube is connected to the second end B of the electromagnet coil of the high-voltage relay, and the other end of the switch tube is grounded. The charging and discharging directions of the capacitor C1 are determined through the diode, the electric quantity of the capacitor can be supplied to the high-voltage relay to a large extent, the capacitor with smaller electric capacity can be used, the occupied space of the capacitor is reduced, the cost is reduced, and meanwhile, the requirement on the arrangement of a PCB is reduced.
Description
Technical Field
The application relates to the technical field of high-voltage relays, in particular to a control circuit of a high-voltage relay. High-voltage relay and power supply system.
Background
In a high-voltage relay control circuit, in order to prevent a sudden drop of a power supply voltage caused by the fact that a conventional fuse element melts down due to the fact that a power supply of a relay control end is unstable, and then a relay contact shakes to damage a relay and rear-end equipment of the relay, the relay control end circuit needs to be optimized.
As shown in fig. 1, a schematic diagram of a sudden drop of a power supply voltage at a control end of a high-voltage relay and a schematic diagram of an anti-jitter control circuit of a conventional high-voltage relay are shown in fig. 2. When the low-voltage power supply is unstable, the capacitor C1 plays a supporting role to prevent the sudden disconnection of the relay due to the sudden drop of the power supply voltage. Wherein, the diode D3 is a freewheeling device after the relay is disconnected.
The anti-shake circuit used at present stabilizes the low-voltage end voltage of the relay through a C1 capacitor, when a low-voltage power supply suddenly drops, the capacitor C1 discharges to a power supply end, the voltage of the C1 is also pulled down, and the C1 is required to have a larger capacity value, so that enough electric quantity can be provided for the relay to keep the relay in a conducting state in a short time; in addition, when the capacitor is large, the current is large when the power supply charges the capacitor, and the service life of the capacitor is shortened; moreover, the large capacitor occupies a large PCB space, and has high cost and high requirement on the arrangement of the PCB.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present application provides a control circuit of a high voltage relay. High-voltage relay and power supply system solve current high-voltage relay's anti-shake control circuit and need adopt the electric capacity of great holding and occupy that PCB space is great, and the cost is higher, the higher problem of requirement to PCB board arrangement.
To achieve the above object, the inventors provide a control circuit of a high-voltage relay, comprising:
the positive electrode of the first diode D1 is connected to a low-voltage power supply, and the negative electrode of the first diode D1 is connected to the first end A of the electromagnet coil of the high-voltage relay;
one end of the capacitor C1 is connected to the negative electrode of the first diode D1 and the first end A of the electromagnet coil of the high-voltage relay, and the other end of the capacitor C1 is grounded;
and the control end of the switch tube Q1 is connected to the control unit, one end of the switch tube Q1 is connected to the second end B of the electromagnet coil of the high-voltage relay, and the other end of the switch tube Q1 is grounded.
Further optimization, still include:
the resistor R1 is arranged between the cathode of the first diode D1 and the capacitor C1;
and the second diode D2 is arranged between the capacitor C1 and the first end A of the high-voltage relay, the anode of the second diode D2 is connected to the capacitor C1, and the cathode of the second diode D2 is connected to the first end A of the electromagnet coil of the high-voltage relay.
Further preferably, the switching tube Q1 is a switching triode.
Further optimization, still include:
and the third diode D3 is a freewheeling diode, the anode of the third diode D3 is connected to the first end A of the electromagnet coil of the high-voltage relay, and the cathode of the third diode D3 is connected to the second end B of the electromagnet coil of the high-voltage relay.
Still provide another technical scheme: a high voltage relay comprising a control circuit, the control circuit comprising:
the positive electrode of the first diode D1 is connected with a low-voltage power supply, and the negative electrode of the first diode D1 is connected with the first end A of the electromagnet coil of the high-voltage relay;
one end of the capacitor C1 is connected to the negative electrode of the first diode D1 and the first end A of the electromagnet coil of the high-voltage relay, and the other end of the capacitor C1 is grounded;
the control end of the switch tube Q1 is connected to the control unit, one end of the switch tube Q1 is connected to the second end B of the electromagnet coil of the high-voltage relay, and the other end of the switch tube Q1 is grounded.
Further optimization, still include:
the resistor R1 is arranged between the cathode of the first diode D1 and the capacitor C1;
and the second diode D2 is arranged between the capacitor C1 and the first end A of the high-voltage relay, the anode of the second diode D2 is connected to the capacitor C1, and the cathode of the second diode D2 is connected to the first end A of the electromagnet coil of the high-voltage relay.
Further preferably, the switching tube Q1 is a switching triode.
Further optimization, still include:
and the third diode D3 is a freewheeling diode, the anode of the third diode D3 is connected to the first end A of the electromagnet coil of the high-voltage relay, and the cathode of the third diode D3 is connected to the second end B of the electromagnet coil of the high-voltage relay.
The power supply system comprises a low-voltage power supply, a control unit, a high-voltage relay, a high-voltage power supply and load equipment;
the low-voltage power supply is used for supplying power to an electromagnet coil of the high-voltage relay;
the control unit is used for controlling the on-off of the high-voltage relay;
the high-voltage relay is the high-voltage relay;
the high-voltage power supply is connected with a first contact of the high-voltage relay;
the load device is connected to the second contact of the high-voltage relay.
Be different from prior art, above-mentioned technical scheme, the control unit realizes high voltage relay K1's break-make through control switch pipe Q1, and when switch pipe Q1 disconnection, high voltage relay K1 disconnection, low voltage power supply charges for electric capacity C1 through first diode D1. When the switch tube Q1 is switched on, the low-voltage power supply directly supplies power to the electromagnet coil of the high-voltage relay K1, the high-voltage relay K1 is switched on, and the rear-end high-voltage power supply supplies power to the load equipment. If the input end of the low-voltage power supply shakes under the conducting state of the high-voltage relay K1, and the voltage suddenly decreases, the capacitor C1 supplies power to the high-voltage relay K1, and because the diode has one-way conductivity, when the voltage of the low-voltage power supply decreases, the first diode D1 is cut off, namely, the capacitor C1 only supplies power to the high-voltage relay K1, and the situation that the K1 shakes and is disconnected due to the sudden drop of the power supply is prevented. The charging and discharging directions of the capacitor C1 are determined through the diode, the electric quantity of the capacitor can be greatly supplied to the high-voltage relay, the capacitor with smaller electric capacity can be used, the occupied space of the capacitor is reduced, the cost is reduced, and meanwhile, the requirement on the arrangement of a PCB is reduced.
The above description of the present invention is only an overview of the technical solutions of the present application, and in order to make the technical solutions of the present application more clearly understood by those skilled in the art, the present invention may be further implemented according to the content described in the text and the drawings of the present application, and in order to make the above objects, other objects, features, and advantages of the present application more easily understood, the following description is made in conjunction with the detailed description of the present application and the drawings.
Drawings
The drawings are only for purposes of illustrating the principles, implementations, applications, features, and effects of particular embodiments of the present application, as well as others related thereto, and are not to be construed as limiting the application.
In the drawings of the specification:
FIG. 1 is a schematic diagram of a sudden drop of a power supply voltage at a control terminal of a high-voltage relay in the background art;
FIG. 2 is a schematic diagram of an anti-jitter control circuit of a prior art high voltage relay;
FIG. 3 is a schematic diagram of a control circuit of the high voltage relay according to an embodiment;
FIG. 4 is another schematic diagram of a control circuit of the high voltage relay according to an embodiment;
FIG. 5 is a waveform diagram of the anti-shake effect of the power supply slump test of the high-voltage relay according to the embodiment of the present invention;
fig. 6 is a waveform diagram of the anti-shake effect of the high-voltage relay power supply dip test performed by the control circuit of the high-voltage relay according to the embodiment of the present invention.
The reference numerals referred to in the above figures are explained below:
210. a low-voltage power supply for supplying power to the power supply,
220. a control unit;
230. a high voltage power supply;
240. a load device.
Detailed Description
In order to explain in detail possible application scenarios, technical principles, practical embodiments, and the like of the present application, the following detailed description is given with reference to the accompanying drawings in conjunction with the listed embodiments. The embodiments described herein are only used for clearly illustrating the technical solutions of the present application, and therefore are only used as examples, and the scope of the present application is not limited thereby.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or related to other embodiments specifically defined. In principle, in the present application, the technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution as long as there is no technical contradiction or conflict.
Unless otherwise defined, technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the use of relational terms herein is intended only to describe particular embodiments and is not intended to limit the present application.
In the description of the present application, the term "and/or" is a expression for describing a logical relationship between objects, meaning that three relationships may exist, for example a and/or B, meaning: there are three cases of A, B, and both A and B. In addition, the character "/" herein generally indicates that the former and latter associated objects are in a logical relationship of "or".
In this application, terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
Without further limitation, in this application, the use of "including," "comprising," "having," or other similar expressions in phrases and expressions of "including," "comprising," or "having," is intended to cover a non-exclusive inclusion, and such expressions do not exclude the presence of additional elements in a process, method, or article that includes the recited elements, such that a process, method, or article that includes a list of elements may include not only those elements but also other elements not expressly listed or inherent to such process, method, or article.
As is understood in the examination of the guidelines, the terms "greater than", "less than", "more than" and the like in this application are to be understood as excluding the number; the expressions "above", "below", "within" and the like are understood to include the present numbers. Furthermore, the description of embodiments herein of the present application of the term "plurality" means more than two (including two), and the analogous meaning of "plurality" is also to be understood, e.g., "plurality", etc., unless explicitly specified otherwise.
In the description of the embodiments of the present application, spatially relative expressions such as "central," "longitudinal," "lateral," "length," "width," "thickness," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used, and the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the specific embodiments or drawings and are only for convenience of describing the specific embodiments of the present application or for the convenience of the reader, and do not indicate or imply that the device or component in question must have a specific position, a specific orientation, or be constructed or operated in a specific orientation and therefore should not be construed as limiting the embodiments of the present application.
Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured," and "disposed" used in the description of the embodiments of the present application are to be construed broadly. For example, the connection can be a fixed connection, a detachable connection, or an integrated arrangement; it can be a mechanical connection, an electrical connection, or a communication connection; they may be directly connected or indirectly connected through an intermediate; which may be communication within two elements or an interaction of two elements. Specific meanings of the above terms in the embodiments of the present application can be understood by those skilled in the art to which the present application pertains in accordance with specific situations.
Referring to fig. 3 to 4, the present embodiment provides a control circuit of a high voltage relay, including:
a first diode D1, wherein the anode of the first diode D1 is connected to the low-voltage power supply 210, and the cathode of the first diode D1 is connected to the first end A of the electromagnet coil of the high-voltage relay K1;
one end of the capacitor C1 is connected to the cathode of the first diode D1 and the first end A of the electromagnet coil of the high-voltage relay K2, and the other end of the capacitor C1 is grounded;
the control end of the switch tube Q1 is connected to the control unit 220, one end of the switch tube Q1 is connected to the second end B of the electromagnet coil of the high-voltage relay K1, and the other end of the switch tube Q1 is grounded.
The control unit 220 controls the switching tube Q1 to switch on and off the high-voltage relay K1, when the switching tube Q1 is switched off, the high-voltage relay K1 is switched off, and the low-voltage power supply 210 charges the capacitor C1 through the first diode D1. When the switching tube Q1 is turned on, the low voltage power supply 210 directly supplies power to the electromagnet coil of the high voltage relay K1, the high voltage relay K1 is turned on, and the rear end high voltage power supply 230 supplies power to the load device 240. If the input end of the low-voltage power supply 210 shakes and the voltage suddenly decreases in the on state of the high-voltage relay K1, the capacitor C1 supplies power to the high-voltage relay K1, and because the diode has one-way conductivity, when the voltage of the low-voltage power supply 210 decreases, the first diode D1 is cut off, namely, the capacitor C1 only supplies power to the high-voltage relay K1, so that the situation that the K1 shakes and is disconnected due to the sudden drop of the power supply is prevented. The charging and discharging directions of the capacitor C1 are determined through the diode, the electric quantity of the capacitor can be supplied to the high-voltage relay to a large extent, the capacitor with smaller electric capacity can be used, the occupied space of the capacitor is reduced, the cost is reduced, and meanwhile, the requirement on the arrangement of a PCB is reduced.
Referring to fig. 4, in some embodiments, the method further includes:
the resistor R1 is arranged between the cathode of the first diode D1 and the capacitor C1;
and the second diode D2 is arranged between the capacitor C1 and the first end A of the high-voltage relay, the anode of the second diode D2 is connected to the capacitor C1, and the cathode of the second diode D2 is connected to the first end A of the electromagnet coil of the high-voltage relay.
When the low voltage power supply 210 charges the capacitor C1, the low voltage power supply 210 is electrified for the capacitor C1 through the resistor R1, the phenomenon that the current is large when the low voltage power supply 210 charges the capacitor C1 is avoided, the service life of the capacitor C1 is shortened, when the capacitor C1 discharges, the low voltage power supply discharges in an electromagnet coil of the high voltage relay K1 through the second diode D2, the capacitor C1 can supply power for the high voltage relay K1 to the maximum extent, the charging and discharging directions of the capacitor are determined by adopting the two diodes, the electric quantity of the capacitor is supplied to the relay to the maximum extent, the electric quantity can be realized by using a small capacitor, and the space occupied by the capacitor is reduced.
In some embodiments, the prior art and the modified technology are used to perform the relay power supply collapse test respectively. The initial voltage of a power supply (a low-voltage power supply 210) at the control end of the high-voltage relay K1 is 24V, the duration of the power supply is decreased to 6V,6V is 100ms, and the on-off state of the high-voltage relay K1 is detected. As shown in fig. 5, which is a waveform diagram of the anti-shake effect of the power supply slump test of the high-voltage relay made by adopting the prior art, and in fig. 6, which is a waveform diagram of the anti-shake effect of the power supply slump test of the high-voltage relay made by adopting the control circuit of the high-voltage relay of the present application, the upper channel 1 is the voltage value at two ends of the coil at the control side of the relay (the voltage at two points of the electromagnet coil AB of the high-voltage relay); the lower channel 2 is the relay auxiliary contact switch voltage, the high level indicates the relay closed state, and the low level indicates the relay open state. The total capacitance of the capacitor used in the prior art is 4000uF, the effect is shown in fig. 5, when the power supply voltage of the control end suddenly drops to 6V, the high-voltage relay K1 is switched off, and the technology cannot prevent the jitter caused by the power supply sudden drop. As shown in fig. 6, the improved technology uses a capacitor with a total capacity of 680uF, and when the power supply voltage at the control end suddenly drops to 6V and lasts for 100ms, the high-voltage relay K1 is not turned off, so as to achieve the anti-shake effect.
In some embodiments, the switching transistor Q1 is a switching transistor. The shape of the Switch transistor (Switch transistor) is the same as that of a common transistor, and the Switch transistor works in a cut-off area and a saturation area, which is equivalent to the cut-off and the conduction of a circuit. Because it has the function of completing the open circuit and the close circuit, it is widely used in various switch circuits, such as the common switch power circuit, the drive circuit, the high frequency oscillation circuit, the analog-digital conversion circuit, the pulse circuit and the output circuit. In other embodiments, the switching tube Q1 may also be a field effect transistor, an insulated gate bipolar transistor, or the like
Referring to fig. 3-4, in some embodiments, the method further includes:
and the third diode D3 is a freewheeling diode, the anode of the third diode D3 is connected to the first end A of the electromagnet coil of the high-voltage relay, and the cathode of the third diode D3 is connected to the second end B of the electromagnet coil of the high-voltage relay. A freewheeling diode (sometimes referred to as a flywheel diode or a snubber diode) is a diode used with an inductive load, and when the current of the inductive load changes suddenly or decreases, an abrupt voltage is generated across the inductor, which may damage other components. When the electromagnet coil of the high-voltage relay K1 is matched with the freewheeling diode, the current of the high-voltage relay can be changed more gently, and the occurrence of surge voltage is avoided.
Referring to fig. 3-4, in another embodiment, a high voltage relay includes a control circuit, the control circuit includes:
a first diode D1, wherein the anode of the first diode D1 is connected to the low-voltage power supply 210, and the cathode of the first diode D1 is connected to the first end A of the electromagnet coil of the high-voltage relay K1;
one end of the capacitor C1 is connected to the negative electrode of the first diode D1 and the first end A of the electromagnet coil of the high-voltage relay K2, and the other end of the capacitor C1 is grounded;
switch tube Q1, switch tube Q1's control end is connected in the control unit 220, switch tube Q1's one end is connected in high voltage relay K1's electromagnet coil second end B, switch tube Q1's the other end ground connection.
The control unit 220 controls the switch tube Q1 to switch on and off the high-voltage relay K1, when the switch tube Q1 is switched off, the high-voltage relay K1 is switched off, and the low-voltage power supply 210 charges the capacitor C1 through the first diode D1. When the switching tube Q1 is turned on, the low-voltage power supply 210 directly supplies power to the electromagnet coil of the high-voltage relay K1, the high-voltage relay K1 is turned on, and the rear-end high-voltage power supply 230 supplies power to the load device 240. If the input end of the low-voltage power supply 210 shakes under the conducting state of the high-voltage relay K1, and the voltage suddenly decreases, the capacitor C1 supplies power to the high-voltage relay K1, and because the diode has unidirectional conductivity, when the voltage of the low-voltage power supply 210 decreases, the first diode D1 is cut off, namely, the capacitor C1 only supplies power to the high-voltage relay K1, and therefore shaking disconnection of the high-voltage relay K1 due to sudden power supply drop is prevented. The charging and discharging directions of the capacitor C1 are determined through the diode, the electric quantity of the capacitor can be supplied to the high-voltage relay to a large extent, the capacitor with smaller electric capacity can be used, the occupied space of the capacitor is reduced, the cost is reduced, and meanwhile, the requirement on the arrangement of a PCB is reduced.
Referring to fig. 4, in some embodiments, the method further includes:
the resistor R1 is arranged between the cathode of the first diode D1 and the capacitor C1;
and the second diode D2 is arranged between the capacitor C1 and the first end A of the high-voltage relay, the anode of the second diode D2 is connected to the capacitor C1, and the cathode of the second diode D2 is connected to the first end A of the electromagnet coil of the high-voltage relay.
When the low voltage power supply 210 charges the capacitor C1, the low voltage power supply 210 is electrified for the capacitor C1 through the resistor R1, the phenomenon that the current is large when the low voltage power supply 210 charges the capacitor C1 is avoided, the service life of the capacitor C1 is shortened, when the capacitor C1 discharges, the low voltage power supply discharges in an electromagnet coil of the high voltage relay K1 through the second diode D2, the capacitor C1 can supply power for the high voltage relay K1 to the maximum extent, the charging and discharging directions of the capacitor are determined by adopting the two diodes, the electric quantity of the capacitor is supplied to the relay to the maximum extent, the electric quantity can be realized by using a small capacitor, and the space occupied by the capacitor is reduced.
In some embodiments, the switching transistor Q1 is a switching transistor. The shape of the Switch transistor (Switch transistor) is the same as that of a common transistor, and the Switch transistor works in a cut-off area and a saturation area, which is equivalent to the cut-off and the conduction of a circuit. Because it has the function of completing the open circuit and the close circuit, it is widely used in various switch circuits, such as the common switch power circuit, the drive circuit, the high frequency oscillation circuit, the analog-digital conversion circuit, the pulse circuit and the output circuit. In other embodiments, the switching tube Q1 may also be a field effect transistor, an insulated gate bipolar transistor, or the like
Referring to fig. 3-4, in some embodiments, the method further includes:
and the third diode D3 is a freewheeling diode, the anode of the third diode D3 is connected to the first end A of the electromagnet coil of the high-voltage relay, and the cathode of the third diode D3 is connected to the second end B of the electromagnet coil of the high-voltage relay. A freewheeling diode (sometimes referred to as a freewheeling diode or a snubber diode) is a diode used with an inductive load, and when the current of the inductive load changes suddenly or decreases, an abrupt voltage is generated across the inductor, which may damage other components. When the electromagnet coil of the high-voltage relay K1 is matched with the freewheeling diode, the current of the high-voltage relay can be changed more gently, and the occurrence of surge voltage is avoided.
Referring to fig. 3-4, in another embodiment, a power supply system includes a low voltage power supply 210, a control unit 220, a high voltage relay, a high voltage power supply 230, and a load device 240;
the low-voltage power supply 210 is used for supplying power to an electromagnet coil of the high-voltage relay;
the control unit 220 is used for controlling the on-off of the high-voltage relay;
the high-voltage relay is the high-voltage relay in the embodiment;
the high voltage power supply 230 is connected to a first contact of the high voltage relay;
the load device 240 is connected to the second contact of the high voltage relay.
The control unit 220 controls the switching tube Q1 to switch on and off the high-voltage relay K1, when the switching tube Q1 is switched off, the high-voltage relay K1 is switched off, and the low-voltage power supply 210 charges the capacitor C1 through the first diode D1. When the switching tube Q1 is turned on, the low-voltage power supply 210 directly supplies power to the electromagnet coil of the high-voltage relay K1, the high-voltage relay K1 is turned on, and the rear-end high-voltage power supply 230 supplies power to the load device 240. If the input end of the low-voltage power supply 210 shakes and the voltage suddenly decreases in the on state of the high-voltage relay K1, the capacitor C1 supplies power to the high-voltage relay K1, and because the diode has one-way conductivity, when the voltage of the low-voltage power supply 210 decreases, the first diode D1 is cut off, namely, the capacitor C1 only supplies power to the high-voltage relay K1, so that the situation that the K1 shakes and is disconnected due to the sudden drop of the power supply is prevented. The charging and discharging directions of the capacitor C1 are determined through the diode, the electric quantity of the capacitor can be supplied to the high-voltage relay to a large extent, the capacitor with smaller electric capacity can be used, the occupied space of the capacitor is reduced, the cost is reduced, and meanwhile, the requirement on the arrangement of a PCB is reduced.
Finally, it should be noted that, although the above embodiments have been described in the text and drawings of the present application, the scope of the patent protection of the present application is not limited thereby. All technical solutions which are generated by replacing or modifying the equivalent structure or the equivalent flow according to the contents described in the text and the drawings of the present application, and which are directly or indirectly implemented in other related technical fields, are included in the scope of protection of the present application.
Claims (9)
1. A control circuit for a high voltage relay, comprising:
the positive electrode of the first diode D1 is connected with a low-voltage power supply, and the negative electrode of the first diode D1 is connected with the first end A of the electromagnet coil of the high-voltage relay;
one end of the capacitor C1 is connected to the cathode of the first diode D1 and the first end A of the electromagnet coil of the high-voltage relay, and the other end of the capacitor C1 is grounded;
the control end of the switch tube Q1 is connected to the control unit, one end of the switch tube Q1 is connected to the second end B of the electromagnet coil of the high-voltage relay, and the other end of the switch tube Q1 is grounded.
2. The control circuit of a high-voltage relay according to claim 1, further comprising:
the resistor R1 is arranged between the cathode of the first diode D1 and the capacitor C1;
and the second diode D2 is arranged between the capacitor C1 and the first end A of the high-voltage relay, the anode of the second diode D2 is connected to the capacitor C1, and the cathode of the second diode D2 is connected to the first end A of the electromagnet coil of the high-voltage relay.
3. The control circuit of the high-voltage relay according to claim 1, wherein the switching tube Q1 is a switching transistor.
4. The control circuit of a high-voltage relay according to claim 1, further comprising:
and the third diode D3 is a freewheeling diode, the anode of the third diode D3 is connected to the first end A of the electromagnet coil of the high-voltage relay, and the cathode of the third diode D3 is connected to the second end B of the electromagnet coil of the high-voltage relay.
5. A high voltage relay comprising a control circuit, said control circuit comprising:
the positive electrode of the first diode D1 is connected to a low-voltage power supply, and the negative electrode of the first diode D1 is connected to the first end A of the electromagnet coil of the high-voltage relay;
one end of the capacitor C1 is connected to the negative electrode of the first diode D1 and the first end A of the electromagnet coil of the high-voltage relay, and the other end of the capacitor C1 is grounded;
and the control end of the switch tube Q1 is connected to the control unit, one end of the switch tube Q1 is connected to the second end B of the electromagnet coil of the high-voltage relay, and the other end of the switch tube Q1 is grounded.
6. The high voltage relay according to claim 5, further comprising:
the resistor R1 is arranged between the cathode of the first diode D1 and the capacitor C1;
and the second diode D2 is arranged between the capacitor C1 and the first end A of the high-voltage relay, the anode of the second diode D2 is connected to the capacitor C1, and the cathode of the second diode D2 is connected to the first end A of the electromagnet coil of the high-voltage relay.
7. The high-voltage relay according to claim 5, wherein the switching tube Q1 is a switching transistor.
8. The high voltage relay according to claim 5, further comprising:
and the third diode D3 is a freewheeling diode, the anode of the third diode D3 is connected to the first end A of the electromagnet coil of the high-voltage relay, and the cathode of the third diode D3 is connected to the second end B of the electromagnet coil of the high-voltage relay.
9. A power supply system is characterized by comprising a low-voltage power supply, a control unit, a high-voltage relay, a high-voltage power supply and load equipment;
the low-voltage power supply is used for supplying power to an electromagnet coil of the high-voltage relay;
the control unit is used for controlling the on-off of the high-voltage relay;
the high-voltage relay is the high-voltage relay of any one of claims 5 to 8;
the high-voltage power supply is connected with a first contact of the high-voltage relay;
the load device is connected to the second contact of the high-voltage relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222192278.6U CN218568732U (en) | 2022-08-19 | 2022-08-19 | Control circuit of high-voltage relay, high-voltage relay and power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222192278.6U CN218568732U (en) | 2022-08-19 | 2022-08-19 | Control circuit of high-voltage relay, high-voltage relay and power supply system |
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| CN218568732U true CN218568732U (en) | 2023-03-03 |
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| CN202222192278.6U Active CN218568732U (en) | 2022-08-19 | 2022-08-19 | Control circuit of high-voltage relay, high-voltage relay and power supply system |
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2022
- 2022-08-19 CN CN202222192278.6U patent/CN218568732U/en active Active
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