CN217010341U - Circuit and UPS that relay anti-adhesion is even - Google Patents
Circuit and UPS that relay anti-adhesion is even Download PDFInfo
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- CN217010341U CN217010341U CN202123367342.1U CN202123367342U CN217010341U CN 217010341 U CN217010341 U CN 217010341U CN 202123367342 U CN202123367342 U CN 202123367342U CN 217010341 U CN217010341 U CN 217010341U
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Abstract
The utility model discloses a relay anti-adhesion circuit and a UPS (uninterrupted Power supply), wherein the UPS comprises a bypass circuit and an inverter circuit, the inverter circuit comprises a filter capacitor, a conversion module and a relay, the relay anti-adhesion circuit comprises a control module and a release module, the control module can control the release module to discharge the filter capacitor before the relay is closed, and the phenomenon that the relay is adhered due to the fact that instant large current flows through the relay when the relay is conducted can not occur, so that the UPS is prevented from being damaged due to the fact that the relay is adhered, and normal power supply of a load is guaranteed.
Description
Technical Field
The utility model relates to the technical field of relays, in particular to a relay anti-adhesion circuit and a UPS.
Background
In a UPS (Uninterruptible Power Supply) system, the UPS includes an inverter circuit including a filter capacitor and a relay, and a bypass circuit. Usually, the inverter circuit converts the utility power into a stable ac voltage and supplies the stable ac voltage to the load, and when the UPS is overloaded and over-heated, the UPS switches the power supply of the load from the inverter circuit to the bypass circuit, so as to ensure that the load end is not powered down. However, when the UPS is switched from the bypass circuit to the inverter circuit, if two paths of alternating currents are inconsistent in instantaneous phase output, a large voltage difference exists between two ends of the relay, and a large energy is stored in the filter capacitor, so that an instantaneous large current may be caused to flow through the relay to cause the relay to be adhered, and therefore the bypass voltage and the inverter voltage are output in an instantaneous parallel connection mode, the UPS may be damaged, and the load cannot work normally.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a relay anti-adhesion circuit and a UPS (uninterrupted Power supply), which avoid the phenomenon of relay adhesion, avoid the damage of the UPS due to the relay adhesion and ensure the normal power supply of a load.
In order to solve the technical problem, the utility model provides a circuit for preventing a relay from being adhered, which is applied to a UPS (uninterrupted power supply), wherein the UPS comprises a bypass circuit and an inverter circuit, the bypass circuit is connected with the inverter circuit in parallel, one end of the parallel circuit is connected with a mains supply, the other end of the parallel circuit is connected with one end of a load, and the other end of the load is connected with a zero line; the inverter circuit comprises a filter capacitor, a transformation module and a relay, one end of the filter capacitor is connected with a common end connected with the transformation module and the relay, and the other end of the filter capacitor is connected with the zero line;
the anti-sticking circuit of the relay comprises a control module and a release module;
the bleeding module is respectively connected with the control module and the relay;
the control module is used for controlling the discharge module to discharge the filter capacitor before the relay is closed.
Preferably, the bypass circuit comprises two thyristors connected in anti-parallel.
Preferably, the transformation module comprises a rectification module, a bus capacitor, an inversion module and a filter inductor which are sequentially connected in series, one end of the filter inductor is connected with the output end of the inversion module, and the other end of the filter inductor is respectively connected with one end of the filter capacitor and one end of the relay;
the bleeder module is the bleeder module that constitutes the contravariant module, bus capacitor and the filter inductance.
Preferably, the bleeder module comprises a first switch tube provided with a first diode, a second switch tube provided with a second diode, a third switch tube provided with a third diode, a fourth switch tube provided with a fourth diode, a first capacitor, a second capacitor and the filter inductor;
the first capacitor and the second capacitor are sequentially connected in series between a positive bus and a negative bus, a connection common end of the first capacitor and the second capacitor is respectively connected with the zero line and a first end of the second switch tube, the first switch tube and the fourth switch tube are sequentially connected in series between the positive bus and the negative bus, a second end of the second switch tube is connected with a first end of the third switch tube, a connection common end of the first switch tube and the fourth switch tube is respectively connected with a second end of the third switch tube and one end of the filter inductor, a cathode of the first diode is connected with the positive bus, an anode of the first diode is connected with one end of the filter inductor, a cathode of the second diode is connected with the zero line, and an anode of the second diode is connected with a second end of the second switch tube, the anode of the third diode is connected with the first end of the third switching tube, the cathode of the third diode is connected with one end of the filter inductor, the cathode of the fourth diode is connected with one end of the filter inductor, the anode of the fourth diode is connected with the negative bus, and the other end of the filter inductor is connected with one end of the filter capacitor and one end of the relay respectively.
Preferably, the bleeder module comprises a fifth switching tube provided with a fifth diode, a sixth switching tube provided with a sixth diode, a seventh switching tube provided with a seventh diode, an eighth switching tube provided with an eighth diode, a ninth diode, a twelfth diode, a third capacitor, a fourth capacitor and the filter inductor;
the third capacitor and the fourth capacitor are sequentially connected in series between a positive bus and a negative bus, the connection common end of the third capacitor and the fourth capacitor is respectively connected with the zero line, the anode of the ninth diode and the cathode of the twelfth diode, the fifth switch tube, the sixth switch tube, the seventh switch tube and the eighth switch tube are sequentially connected in series between the positive bus and the negative bus, the cathode of the ninth diode is connected with the connection common end of the fifth switch tube and the sixth switch tube, the anode of the twelfth diode is connected with the connection common end of the seventh switch tube and the eighth switch tube, the connection common end of the sixth switch tube and the seventh switch tube is connected with one end of the filter inductor, the cathode of the fifth diode is connected with the positive bus, and the anode of the fifth diode is connected with the cathode of the ninth diode, the cathode of the sixth diode is connected with the cathode of the ninth diode, the anode of the sixth diode is connected with one end of the filter inductor, the cathode of the seventh diode is connected with one end of the filter inductor, the anode of the seventh diode is connected with the anode of the dodecapole tube, the cathode of the eighth diode is connected with the anode of the dodecapole tube, the anode of the eighth diode is connected with the negative bus, and the other end of the filter inductor is respectively connected with one end of the filter capacitor and one end of the relay.
Preferably, the first switching tube, the second switching tube, the third switching tube and the fourth switching tube are all IGBTs.
Preferably, the fifth switching tube, the sixth switching tube, the seventh switching tube and the eighth switching tube are all IGBTs.
In order to solve the technical problem, the utility model also provides a UPS which comprises a bypass circuit and an inverter circuit, wherein the bypass circuit is connected with the inverter circuit in parallel, one end of the parallel circuit is connected with a mains supply, the other end of the parallel circuit is connected with one end of a load, and the other end of the load is connected with a zero line; the inverter circuit comprises a filter capacitor, a transformation module and a relay, one end of the filter capacitor is connected with a common end connected with the transformation module and the relay, and the other end of the filter capacitor is connected with the zero line; the anti-sticking circuit of the relay is also included.
The utility model discloses a relay anti-adhesion circuit and a UPS (uninterrupted Power supply), wherein the UPS comprises a bypass circuit and an inverter circuit, the inverter circuit comprises a filter capacitor, a conversion module and a relay, the relay anti-adhesion circuit comprises a control module and a release module, the control module can control the release module to discharge the filter capacitor before the relay is closed, and the phenomenon that the relay is adhered due to the fact that instant large current flows through the relay when the relay is conducted can not occur, so that the UPS is prevented from being damaged due to the fact that the relay is adhered, and normal power supply of a load is guaranteed.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a relay anti-sticking circuit according to the present invention;
FIG. 2 is a schematic diagram of a UPS according to the present invention;
FIG. 3 is a timing diagram illustrating the operation of a UPS according to the present invention;
FIG. 4 is a schematic diagram of an operating state of a relay anti-sticking circuit according to the present invention;
FIG. 5 is a schematic diagram of another working state of the relay anti-sticking circuit provided by the utility model;
FIG. 6 is a schematic diagram of another working state of the anti-sticking relay circuit according to the present invention;
FIG. 7 is a schematic diagram of another working state of the anti-sticking relay circuit according to the present invention;
FIG. 8 is a schematic diagram of an operating state of another relay anti-sticking circuit provided in the present invention;
FIG. 9 is a schematic diagram of another operating state of another relay anti-sticking circuit according to the present invention;
FIG. 10 is a schematic diagram of another operating state of another relay anti-sticking circuit provided in the present invention;
fig. 11 is a schematic diagram of another working state of another relay anti-sticking circuit provided by the utility model.
Detailed Description
The utility model has the core that the circuit for preventing the relay from being adhered and the UPS are provided, so that the phenomenon of adhering the relay is avoided, the UPS is prevented from being damaged due to the adhering of the relay, and the normal power supply to a load is ensured.
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. 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.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a relay anti-sticking circuit provided in the present application.
The utility model provides an anti-adhesion circuit of a relay 43, wherein a UPS (uninterrupted Power supply) comprises a bypass circuit 3 and an inverter circuit 4, the bypass circuit 3 is connected with the inverter circuit 4 in parallel, one end of the parallel circuit is connected with a mains supply, the other end of the parallel circuit is connected with one end of a load, and the other end of the load is connected with a zero line; the inverter circuit 4 comprises a filter capacitor 42, a transformation module 41 and a relay 43, one end of the filter capacitor 42 is connected with a common end connected with the transformation module 41 and the relay 43, and the other end of the filter capacitor 42 is connected with a zero line;
the anti-adhesion circuit of the relay 43 comprises a control module 1 and a discharge module 2;
the bleeder module 2 is respectively connected with the control module 1 and the relay 43;
the control module 1 is used for controlling the bleeding module 2 to discharge the filter capacitor 42 before the relay 43 is closed.
Considering that when the bypass circuit 3 is switched to the inverter circuit 4 in the UPS system, if there is an output inconsistency between the bypass circuit 3 and the inverter circuit 4, in an extreme case, there may exist a situation where a peak exists and a trough exists in the two phases, at this time, there exists a large voltage difference between two ends of the relay 43 in the inverter circuit 4, and because the filter capacitor 42 in the inverter circuit 4 stores a large energy, when the static switch of the bypass circuit 3 is turned off and the relay 43 of the inverter circuit 4 is closed, a large impact current may be generated at a contact of the relay 43 to cause the relay 43 to be adhered, thereby causing instant parallel output of the bypass voltage and the inverter voltage, possibly damaging the UPS, and causing the load to fail to work normally.
For solving above-mentioned technical problem, in this application, the circuit that relay 43 anti-adhesion is connected is applied to UPS, and wherein UPS includes bypass circuit 3 and inverter circuit 4, and inverter circuit 4 includes filter capacitor 42, transform module 41 and relay 43, and wherein transform module 41 can carry out the vary voltage to the commercial power. The circuit that relay 43 anti-adhesion was even includes control module 1 and the module 2 of releasing, and control module 1 can control the module 2 of releasing before relay 43 is closed and discharge to filter capacitor 42 in inverter circuit 4 to realized the purpose that reduces relay 43 both ends voltage differential greatly, just also can not have the heavy current in the twinkling of an eye when relay 43 switches on and flow through relay 43 and lead to the phenomenon that relay 43 is even to take place, and circuit structure is simple, easily the operation.
In addition, the bleeding module 2 may be independently disposed in a module other than the UPS, or may multiplex a circuit module in the UPS, which is not particularly limited herein.
Referring to fig. 2, fig. 2 is a schematic diagram of a UPS according to the present application. Referring to fig. 3, fig. 3 is a timing diagram illustrating an operation of a UPS according to the present application. The control module 1 can also control the bypass circuit 3 and the relay 43, before the relay 43 is not closed, the control module 1 controls the bypass circuit 3 to be conducted, so that the bypass circuit 3 is used for supplying power to a load, in the working process of switching the inverter circuit 4 by the bypass circuit 3, firstly, the control module 1 controls the bypass circuit 3 to be disconnected, after a signal for driving the relay 43 in the inverter circuit 4 to be closed is detected, the control module 1 sends a signal for driving the relay 43 in the inverter circuit 4 to be closed, then, the relay 43 is closed, the closing time of the relay 43 is about 4ms, after the driving signal of the relay 43 in the inverter circuit 4 is sent and before the contact of the relay 43 is actually attracted, the discharge module 2 is controlled to discharge so as to realize the adjustment of the inverter voltage in the inverter circuit 4, so that the inverter voltage is slowly reduced to be close to 0, and after the relay 43 is closed, the inverter voltage modulation recovers normal control, and the application is not limited herein.
In conclusion, the circuit that relay 43 of this application was prevented gluing has avoided relay 43 to glue the phenomenon emergence of even, has avoided UPS because of relay 43 glues even and damages, has guaranteed the normal power supply to the load.
On the basis of the above-described embodiment:
as a preferred embodiment, the bypass circuit 3 comprises two anti-parallel thyristors.
In this embodiment, the bypass circuit 3 may use two thyristors connected in parallel in reverse direction to conduct the positive half cycle or the negative half cycle of the alternating current, and the conduction of one cycle is alternatively completed by two thyristors, which has the advantages of wide application range and easy development.
As a preferred embodiment, the transformation module 41 includes a rectification module, a bus capacitor, an inversion module and a filter inductor connected in series in sequence, one end of the filter inductor is connected to the output end of the inversion module, and the other end of the filter inductor is connected to one end of the filter capacitor 42 and one end of the relay respectively;
the bleeder module 2 is the bleeder module 2 which forms an inversion module, a bus capacitor and a filter inductor.
In order to reduce the cost of the anti-adhesion circuit of the relay 43, in this embodiment, the conversion module 41 includes the rectifier module, the bus capacitor, the inverter module and the filter inductor which are sequentially connected in series, the discharge module 2 is the discharge module 2 which constitutes the inverter module, the bus capacitor and the filter inductor, that is, the discharge module 2 realizes the multiplexing of the circuit module in the inverter circuit 4, the control module 1 constitutes the inverter module through control, the discharge module 2 of the bus capacitor and the filter inductor discharges the filter capacitor 42 in the inverter circuit 4 before the relay 43 is closed, the problem that the arc-pulling adhesion condition of the relay 43 possibly caused by the overlarge voltage difference between the voltages at the two ends of the relay 43 is solved, thereby avoiding the damage of the UPS due to the adhesion of the relay 43, ensuring the normal power supply to the load, and simultaneously saving the cost of circuit design.
As a preferred embodiment, the bleeder module 2 includes a first switching tube Q1 provided with a first diode D1, a second switching tube Q2 provided with a second diode D2, a third switching tube Q3 provided with a third diode D3, a fourth switching tube Q4 provided with a fourth diode D4, a first capacitor C1, a second capacitor C2, and a filter inductor;
a first capacitor C1 and a second capacitor C2 are sequentially connected in series between the positive bus and the negative bus, the connection common ends of the first capacitor C1 and the second capacitor C2 are respectively connected with the zero line and the first end of a second switch tube Q2, a first switch tube Q1 and a fourth switch tube Q4 are sequentially connected in series between the positive bus and the negative bus, the second end of the second switch tube Q2 is connected with the first end of the third switch tube Q3, the connection common ends of the first switch tube Q1 and the fourth switch tube Q4 are respectively connected with the second end of the third switch tube Q3 and one end of a filter inductor, the cathode of a first diode D1 is connected with the positive bus, the anode of the first diode D1 is connected with one end of the filter inductor, the cathode of a second diode D2 is connected with the zero line, the anode of the second diode D2 is connected with the second end of the second switch tube Q2, the anode of the third diode D3 is connected with the first end of the first switch tube Q3, and the cathode of the filter inductor D3 are connected with the filter inductor, the cathode of the fourth diode D4 is connected to one end of the filter inductor, the anode of the fourth diode D4 is connected to the negative bus, and the other end of the filter inductor is connected to one end of the filter capacitor 42 and one end of the relay 43, respectively.
In this embodiment, the bleeder module 2 includes a first switching tube Q1 provided with a first diode D1, a second switching tube Q2 provided with a second diode D2, a third switching tube Q3 provided with a third diode D3, a fourth switching tube Q4 provided with a fourth diode D4, a first capacitor C1, a second capacitor C2, and a filter inductor. The control module 1 controls the on and off of the circuit of the T-shaped switch tube to discharge the filter capacitor 42.
Specifically, please refer to fig. 4, fig. 4 is a schematic diagram of an operating state of a relay anti-sticking circuit provided in the present application. When the voltage of the filter capacitor 42 is a positive voltage, the circuit forms a BOOST circuit, the control module 1 controls the second switching tube Q2 and the third switching tube Q3 to be turned on at the same time, controls the first switching tube Q1 and the fourth switching tube Q4 to be turned off, and the current of the filter capacitor 42 passes through the filter inductor, the second switching tube Q2 and the third switching tube Q3 to form a loop so that the energy storage of the filter inductor and the discharge of the filter capacitor 42 are enabled. Alternatively, referring to fig. 5, fig. 5 is a schematic view illustrating another working state of the relay anti-sticking circuit provided in the present application. The control module 1 controls the first switch tube Q1, the second switch tube Q2, the third switch tube Q3 and the fourth switch tube Q4 to be turned off, and the energy of the filter inductor flows through the first diode D1 of the first switch tube Q1 to enable current to flow into the bus capacitor, so that the filter capacitor 42 is discharged.
Referring to fig. 6, fig. 6 is a schematic view illustrating another working state of a relay anti-sticking circuit provided in the present application. When the voltage of the filter capacitor 42 is a negative voltage, the control module 1 controls the second switching tube Q2 and the third switching tube Q3 to be turned on, controls the first switching tube Q1 and the fourth switching tube Q4 to be turned off, and the current of the filter capacitor 42 forms a loop through the filter inductor, the second switching tube Q2 and the third switching tube Q3 to enable the filter inductor to store energy and the filter capacitor 42 to discharge. Alternatively, referring to fig. 7, fig. 7 is a schematic view illustrating another working state of the relay anti-sticking circuit provided in the present application. The control module 1 controls the first switch tube Q1, the second switch tube Q2, the third switch tube Q3 and the fourth switch tube Q4 to be turned off, and the energy of the filter inductor flows through the fourth diode D4 of the fourth switch tube Q4, so that the current flows into the bus capacitor, and the filter capacitor 42 is discharged.
In addition, the driving duty ratios of the first switching tube Q1, the second switching tube Q2, the third switching tube Q3 and the fourth switching tube Q4 may be limited, and the limited value is reduced from 20% to approximately 0% with time, so that the voltage of the inverter circuit is slowly reduced to approximately 0, and the application is not limited herein.
As a preferred embodiment, the bleeder module 2 includes a fifth switching tube Q5 provided with a fifth diode D5, a sixth switching tube Q6 provided with a sixth diode D6, a seventh switching tube Q7 provided with a seventh diode D7, an eighth switching tube Q8 provided with an eighth diode D8, a ninth diode D9, a twelfth diode D10, a third capacitor C3, a fourth capacitor C4, and a filter inductor;
a third capacitor C3 and a fourth capacitor C4 are connected in series between the positive bus and the negative bus in sequence, the connection common ends of the third capacitor C3 and the fourth capacitor C4 are connected with the zero line, the anode of a ninth diode D9 and the cathode of a ninth diode D10 in sequence, a fifth switch tube Q5, a sixth switch tube Q6, a seventh switch tube Q7 and an eighth switch tube Q8 are connected in series between the positive bus and the negative bus in sequence, the cathode of the ninth diode D9 is connected with the connection common ends of the fifth switch tube Q5 and the sixth switch tube Q6, the anode of the twelfth diode D592 is connected with the connection common end of the seventh switch tube Q7 and the eighth switch tube Q8, the connection common ends of the sixth switch tube Q6 and the seventh switch tube Q7 are connected with one end of a filter inductor, the cathode of the fifth diode D5 is connected with the positive bus, the cathode of the fifth diode D5 is connected with the cathode of the ninth diode D3872 and the cathode of the ninth diode D6, the anode of the sixth diode D6 is connected to one end of the filter inductor, the cathode of the seventh diode D7 is connected to one end of the filter inductor, the anode of the seventh diode D7 is connected to the anode of the twelfth diode D10, the cathode of the eighth diode D8 is connected to the anode of the twelfth diode D10, the anode of the eighth diode D8 is connected to the negative bus, and the other end of the filter inductor is connected to one end of the filter capacitor 42 and one end of the relay 43, respectively.
The bleeder module 2 comprises a fifth switching tube Q5 provided with a fifth diode D5, a sixth switching tube Q6 provided with a sixth diode D6, a seventh switching tube Q7 provided with a seventh diode D7, an eighth switching tube Q8 provided with an eighth diode D8, a ninth diode D9, a twelfth diode D10, a third capacitor C3, a fourth capacitor C4 and a filter inductor. The control module 1 controls the on and off of the circuit of the I-shaped switch tube to discharge the filter capacitor 42.
Specifically, please refer to fig. 8, fig. 8 is a schematic diagram of an operating state of another relay anti-sticking circuit provided in the present application. When the voltage of the filter capacitor 42 is a positive voltage, the control module 1 controls the seventh switching tube Q7 to be turned on, controls the fifth switching tube Q5, the sixth switching tube Q6 and the eighth switching tube Q8 to be turned off, and the current of the filter capacitor 42 passes through the filter inductor, the seventh switching tube Q7 and the twelfth diode D10 to form a loop, so that the filter inductor stores energy and the filter capacitor 42 discharges the energy. Alternatively, referring to fig. 9, fig. 9 is a schematic diagram of another working state of another relay anti-sticking circuit provided in the present application. The control module 1 controls the fifth switch tube Q5 and the sixth switch tube Q6 to be turned on, controls the seventh switch tube Q7 and the eighth switch tube Q8 to be turned off, and enables the filter inductance energy to pass through the fifth switch tube Q5 and the sixth switch tube Q6, so that current flows into the bus capacitor, and the filter capacitor 42 is discharged.
Referring to fig. 10, fig. 10 is a schematic view illustrating another working state of another relay anti-sticking circuit provided in the present application. When the voltage of the filter capacitor 42 is a negative voltage, the control module 1 controls the sixth switching tube Q6 to be turned on, controls the fifth switching tube Q5, the seventh switching tube Q7 and the eighth switching tube Q8 to be turned off, and forms a loop through the ninth diode D9, the sixth switching tube Q6 and the filter inductor for the current of the filter capacitor 42 to enable the filter inductor to store energy and the filter capacitor 42 to discharge. Alternatively, referring to fig. 11, fig. 11 is a schematic diagram illustrating another working state of another relay anti-sticking circuit provided in the present application. The control module 1 controls the seventh switch tube Q7 and the eighth switch tube Q8 to be turned on, controls the fifth switch tube Q5 and the sixth switch tube Q6 to be turned off, and enables the energy of the filter inductor to pass through the seventh switch tube Q7 and the eighth switch tube Q8, so that current flows into the bus capacitor, and the filter capacitor 42 is discharged.
In addition, the driving duty cycles of the fifth switching tube Q5, the sixth switching tube Q6, the seventh switching tube Q7 and the eighth switching tube Q8 may be limited, and the limited value is reduced from 20% to approximately 0% with time, so that the voltage of the inverter circuit is slowly reduced to approximately 0, which is not limited herein.
As a preferred embodiment, the first switching Transistor Q1, the second switching Transistor Q2, the third switching Transistor Q3 and the fourth switching Transistor Q4 are all IGBTs (Insulated Gate Bipolar transistors).
In this embodiment, the first switching tube Q1, the second switching tube Q2, the third switching tube Q3 and the fourth switching tube Q4 may be IGBTs, and have the advantages of simple driving, easy protection, no buffer circuit, high switching frequency, and the like.
As a preferred embodiment, the fifth switching tube Q5, the sixth switching tube Q6, the seventh switching tube Q7 and the eighth switching tube Q8 are all IGBTs.
In this embodiment, the fifth switching tube Q5, the sixth switching tube Q6, the seventh switching tube Q7 and the eighth switching tube Q8 may be IGBTs, and have the advantages of simple driving, easy protection, no buffer circuit, high switching frequency, and the like.
The utility model also provides a UPS, which comprises a bypass circuit 3 and an inverter circuit 4, wherein the bypass circuit 3 is connected with the inverter circuit 4 in parallel, one end of the parallel circuit is connected with a mains supply, the other end of the parallel circuit is connected with one end of a load, and the other end of the load is connected with a zero line; the inverter circuit 4 comprises a filter capacitor 42, a transformation module 41 and a relay 43, one end of the filter capacitor 42 is connected with a common end connected with the transformation module 41 and the relay 43, and the other end of the filter capacitor 42 is connected with a zero line; also included is the anti-stick circuitry for relay 43 described above.
For the introduction of the UPS provided by the present invention, please refer to the above method embodiments, which are not described herein again.
It is to be noted that, in the present specification, relational terms such as first and second, and the like 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. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The circuit is characterized in that the circuit is applied to a UPS (uninterrupted power supply), the UPS comprises a bypass circuit and an inverter circuit, the bypass circuit is connected with the inverter circuit in parallel, one end of the parallel circuit is connected with a mains supply, the other end of the parallel circuit is connected with one end of a load, and the other end of the load is connected with a zero line; the inverter circuit comprises a filter capacitor, a transformation module and a relay, one end of the filter capacitor is connected with a common end connected with the transformation module and the relay, and the other end of the filter capacitor is connected with the zero line;
the anti-sticking circuit of the relay comprises a control module and a release module;
the bleeding module is respectively connected with the control module and the relay;
the control module is used for controlling the discharge module to discharge the filter capacitor before the relay is closed.
2. The relay anti-sticking circuit of claim 1, wherein the bypass circuit comprises two anti-parallel thyristors.
3. The anti-sticking circuit of the relay according to claim 1 or 2, characterized in that the transformation module comprises a rectification module, a bus capacitor, an inversion module and a filter inductor which are connected in series in sequence, wherein one end of the filter inductor is connected with the output end of the inversion module, and the other end of the filter inductor is respectively connected with one end of the filter capacitor and one end of the relay;
the bleeder module is the bleeder module that constitutes the contravariant module, bus capacitor and the filter inductance.
4. The anti-sticking circuit of relay according to claim 3, wherein the bleeder module comprises a first switch tube provided with a first diode, a second switch tube provided with a second diode, a third switch tube provided with a third diode, a fourth switch tube provided with a fourth diode, a first capacitor, a second capacitor and the filter inductor;
the first capacitor and the second capacitor are sequentially connected in series between a positive bus and a negative bus, a connection common end of the first capacitor and the second capacitor is respectively connected with the zero line and a first end of the second switch tube, the first switch tube and the fourth switch tube are sequentially connected in series between the positive bus and the negative bus, a second end of the second switch tube is connected with a first end of the third switch tube, a connection common end of the first switch tube and the fourth switch tube is respectively connected with a second end of the third switch tube and one end of the filter inductor, a cathode of the first diode is connected with the positive bus, an anode of the first diode is connected with one end of the filter inductor, a cathode of the second diode is connected with the zero line, and an anode of the second diode is connected with a second end of the second switch tube, the anode of the third diode is connected with the first end of the third switching tube, the cathode of the third diode is connected with one end of the filter inductor, the cathode of the fourth diode is connected with one end of the filter inductor, the anode of the fourth diode is connected with the negative bus, and the other end of the filter inductor is connected with one end of the filter capacitor and one end of the relay respectively.
5. The anti-sticking circuit of relay according to claim 3, wherein the bleeder module comprises a fifth switch tube provided with a fifth diode, a sixth switch tube provided with a sixth diode, a seventh switch tube provided with a seventh diode, an eighth switch tube provided with an eighth diode, a ninth diode, a twelfth diode, a third capacitor, a fourth capacitor and the filter inductor;
the third capacitor and the fourth capacitor are sequentially connected in series between a positive bus and a negative bus, the connection common end of the third capacitor and the fourth capacitor is respectively connected with the zero line, the anode of the ninth diode and the cathode of the twelfth diode, the fifth switch tube, the sixth switch tube, the seventh switch tube and the eighth switch tube are sequentially connected in series between the positive bus and the negative bus, the cathode of the ninth diode is connected with the connection common end of the fifth switch tube and the sixth switch tube, the anode of the twelfth diode is connected with the connection common end of the seventh switch tube and the eighth switch tube, the connection common end of the sixth switch tube and the seventh switch tube is connected with one end of the filter inductor, the cathode of the fifth diode is connected with the positive bus, and the anode of the fifth diode is connected with the cathode of the ninth diode, the cathode of the sixth diode is connected with the cathode of the ninth diode, the anode of the sixth diode is connected with one end of the filter inductor, the cathode of the seventh diode is connected with one end of the filter inductor, the anode of the seventh diode is connected with the anode of the dodecapole tube, the cathode of the eighth diode is connected with the anode of the dodecapole tube, the anode of the eighth diode is connected with the negative bus, and the other end of the filter inductor is respectively connected with one end of the filter capacitor and one end of the relay.
6. The relay anti-sticking circuit of claim 4, wherein the first switch tube, the second switch tube, the third switch tube, and the fourth switch tube are IGBTs.
7. The anti-sticking circuit of claim 5, wherein the fifth switching tube, the sixth switching tube, the seventh switching tube, and the eighth switching tube are all IGBTs.
8. A UPS is characterized by comprising a bypass circuit and an inverter circuit, wherein the bypass circuit is connected with the inverter circuit in parallel, one end of the parallel circuit is connected with a mains supply, the other end of the parallel circuit is connected with one end of a load, and the other end of the load is connected with a zero line; the inverter circuit comprises a filter capacitor, a transformation module and a relay, one end of the filter capacitor is connected with a common end connected with the transformation module and the relay, and the other end of the filter capacitor is connected with the zero line; further comprising a relay anti-stick circuit as claimed in any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123367342.1U CN217010341U (en) | 2021-12-29 | 2021-12-29 | Circuit and UPS that relay anti-adhesion is even |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123367342.1U CN217010341U (en) | 2021-12-29 | 2021-12-29 | Circuit and UPS that relay anti-adhesion is even |
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| CN217010341U true CN217010341U (en) | 2022-07-19 |
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