Absorption circuit and inverter

Abstract

The utility model provides an absorption circuit and an inverter, and relates to the relay application field, the absorption circuit comprises a unidirectional conductive module and an energy storage module; one end of the unidirectional conductive module is used for connecting one end of a coil of the relay and one end of the driving circuit, the other end of the unidirectional conductive module is connected with one end of the energy storage module and the control circuit, and the other end of the energy storage module is connected with the control circuit; the one-way conductive module is used for transferring energy generated by a coil of the relay into the energy storage module when the switch of the relay is switched off so as to charge the energy storage module; the energy storage module is used for discharging to the control circuit, redundant electric energy generated by the relay can be transferred through the one-way conductive module and stored through the energy storage module, and therefore the redundant electric energy generated by the relay can be utilized through the energy storage module, energy generated by a relay coil can be absorbed, and the purpose of energy saving is achieved. Energy waste is avoided, and interference to other circuits is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the application field of relay, specifically, relates to an absorption circuit and inverter. BACKGROUND

[0002] In the use scene of relay, the relay is usually arranged between the power supply and the driving circuit, so that when the driving circuit is turned on, the power supply charges the coil of the relay, and the relay contact is closed. However, this processing mode will cause the existence of excess energy in the circuit where the relay is located when the driving circuit is turned off due to the coil inductance, thereby generating a large voltage spike, which causes an overvoltage risk to the driving circuit.

[0003] In the prior art, the energy can be absorbed by the absorption circuit, specifically, a resistor is usually connected in parallel at the position of the coil, so that the energy is absorbed by the parallel resistor.

[0004] However, this absorption circuit causes the energy to be wasted in the form of resistance heat, and the instantaneous current generated by the energy is easy to cause damage to the absorption circuit, and the safety performance is low. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing an absorption circuit and inverter, which can absorb the energy generated by the coil of the relay, reduce the interference to other circuits, and thereby avoid the generation of faults.

[0006] The utility model provides a technical scheme:

[0007] In a first aspect, the utility model provides an absorption circuit, which comprises a unidirectional conductive module and an energy storage module.

[0008] One end of the unidirectional conductive module is used for connecting one end of the coil of the relay and one end of the driving circuit, and the other end of the unidirectional conductive module is connected with one end of the energy storage module and a control circuit, and the other end of the energy storage module is connected with the control circuit.

[0009] The unidirectional conductive module is used for transferring the energy generated by the coil of the relay to the energy storage module when the switch of the relay is turned off, so as to charge the energy storage module.

[0010] The energy storage module is used for discharging to the control circuit.

[0011] In a possible implementation manner, the unidirectional conductive module comprises a first diode.

[0012] An anode of the first diode is used for connecting one end of a coil of a relay and one end of a driving circuit, and a cathode of the first diode is connected with one end of an energy storage module and a control circuit.

[0013] In a possible implementation, the energy storage module comprises a capacitor.

[0014] One end of the capacitor is connected with the other end of the unidirectional conduction module and the control circuit, and the other end of the capacitor is connected with the control circuit.

[0015] In a possible implementation, further comprising a freewheeling module.

[0016] One end of the freewheeling module is connected with the other end of the unidirectional conduction module, and the other end of the freewheeling module is connected with the control circuit.

[0017] In a possible implementation, the freewheeling module comprises a second diode.

[0018] An anode of the second diode is connected with the other end of the unidirectional conduction module, and the other end of the second diode is connected with the control circuit.

[0019] In a second aspect, the utility model provides a kind of inverter, and the inverter comprises: the snubber circuit of the first aspect, control circuit, driving circuit, power circuit and relay;

[0020] The relay comprises a coil and a switch.

[0021] In a possible implementation, the control circuit comprises at least one of the following: a digital signal processor, an ARM energy management control circuit and an analog-digital chip auxiliary power supply circuit.

[0022] In a possible implementation, the switch of the relay is connected with the power circuit.

[0023] In a possible implementation, the power circuit comprises at least one of the following: a direct current converter, an alternating current-direct current converter, an alternating current converter and an alternating current-direct current converter.

[0024] In a possible implementation, one end of the coil is connected with the driving circuit, and the driving circuit comprises a triode.

[0025] The absorption circuit provided by the utility model has the beneficial effects that: the one-way conductive module and the energy storage module are arranged in the absorption circuit, the excess electric energy generated by the relay can be transferred through the one-way conductive module and stored through the energy storage module, the excess electric energy generated by the relay can be utilized through the energy storage module, the energy generated by the relay coil can be absorbed, the waste of energy is avoided, the interference on other circuits is reduced, and the generation of faults is also avoided. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the premise of the drawings.

[0027] Figure 1 It is a schematic diagram of the absorption circuit in the prior art;

[0028] Figure 2 It is a structural schematic diagram of the absorption circuit provided by the embodiments of the utility model;

[0029] Figure 3 It is a structural schematic diagram of the one-way conduction module in the absorption circuit provided by the embodiments of the utility model;

[0030] Figure 4 It is a structural schematic diagram of the energy storage module in the absorption circuit provided by the embodiments of the utility model;

[0031] Figure 5 It is another structural schematic diagram of the absorption circuit provided by the embodiments of the utility model;

[0032] Figure 6 It is still another structural schematic diagram of the absorption circuit provided by the embodiments of the utility model;

[0033] Figure 7 It is a structural schematic diagram of the inverter provided by the embodiments of the utility model. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model more clear, the following will combine the drawings in the embodiments of the utility model, and clearly and completely describe the technical scheme in the embodiments of the utility model, and obviously, the described embodiments are some embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based upon these embodiments of the application, all other embodiments obtained by persons of ordinary skill in the art without having creative work are within the scope of the application.

[0036] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0037] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly understood by those skilled in the art, and are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0038] In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the use scene of the relay, the relay is usually arranged between the power supply and the driving circuit, so that when the driving circuit is turned on, the power supply charges the coil of the relay, and the relay contact is closed. However, this processing method will cause that when the driving circuit is turned off, due to the existence of the coil inductance, extra energy will be generated in the circuit where the relay is located, thereby generating a large voltage peak, which will cause overvoltage risk to the driving circuit.

[0041] Figure 1 is a schematic diagram of the absorption circuit in the prior art, referring to Figure 1As shown in the prior art, a parallel resistor and a diode are connected at the position of the coil, so that the energy is absorbed by the parallel resistor.

[0042] However, this absorption circuit causes the energy to be wasted in the form of resistance heat, and the instantaneous current generated by the energy is easy to cause damage to the absorption circuit, and the safety performance is low.

[0043] The utility model discloses based on above problem, propose a kind of absorption circuit, by being provided with unidirectional conduction module and energy storage module in absorption circuit, so that the excess energy generated by relay can be transferred by unidirectional conduction module, and is stored by energy storage module, so that the excess energy generated by relay can be utilized by energy storage module, realize the energy generated by relay coil is absorbed, avoid the waste of energy and reduce the interference to other circuits, also can avoid the generation of fault.

[0044] Figure 2 For the structure of the absorption circuit provided in the embodiment of the utility model, refer to Figure 2 As shown, the absorption circuit comprises: a unidirectional conduction module and an energy storage module.

[0045] One end of the unidirectional conduction module is used to connect one end of the coil of the relay and one end of the driving circuit, and the other end of the unidirectional conduction module is connected with one end of the energy storage module and the control circuit, and the other end of the energy storage module is connected with the control circuit.

[0046] Optionally, the input end of the unidirectional conduction module is used to connect one end of the coil of the relay and one end of the driving circuit, and the output end of the unidirectional conduction module is connected with one end of the energy storage module and the control circuit, which can allow the current to flow in the direction from the coil to the control circuit, and prevent the current from flowing in the direction from the control circuit to the coil, so as to protect the relay coil from damage caused by reverse current or transient voltage.

[0047] Exemplarily, the unidirectional conduction module can include electronic devices such as thyristors and diodes.

[0048] The unidirectional conduction module is used to transfer the energy generated by the coil of the relay to the energy storage module when the switch of the relay is turned off, so as to charge the energy storage module.

[0049] Exemplarily, when the driving circuit does not need power supply from the power supply VDD, the excess energy generated by the coil of the relay can charge the energy storage module through the unidirectional conduction module.

[0050] The energy storage module is used to discharge to the control circuit.

[0051] Optionally, the energy storage module can store the excess energy generated by the coil of the relay and discharge to the control circuit.

[0052] In the embodiment, by arranging the unidirectional conduction module and the energy storage module in the absorption circuit, the excess energy generated by the relay can be transferred by the unidirectional conduction module and stored by the energy storage module, so that the excess energy generated by the relay can be utilized by the energy storage module, the energy generated by the relay coil is absorbed, the waste of energy is avoided, the interference on other circuits is reduced, and the generation of faults is also avoided.

[0053] As a possible implementation manner, Figure 3 A structure diagram of the unidirectional conduction module in the absorption circuit provided by the embodiment of the utility model, refer to Figure 3 As shown in the figure, on the basis of Figure 2 The unidirectional conduction module comprises: a first diode D1.

[0054] The anode of the first diode D1 is used for connecting one end of the coil of the relay and one end of the driving circuit, and the cathode of the first diode D1 is connected with one end of the energy storage module and the control circuit.

[0055] Optionally, the first diode D1 can allow the current to flow in the direction from the coil to the control circuit, and prevent the current from flowing in the direction from the control circuit to the coil, so as to protect the relay coil from the damage of reverse current or transient voltage.

[0056] As a possible implementation manner, Figure 4 A structure diagram of the energy storage module in the absorption circuit provided by the embodiment of the utility model, refer to Figure 4 As shown in the figure, on the basis of Figure 2 The energy storage module comprises: a capacitor C1.

[0057] One end of the capacitor C1 is connected with the other end of the unidirectional conduction module and the control circuit, and the other end of the capacitor C1 is connected with the control circuit.

[0058] Optionally, the capacitor C1 is used for storing the excess energy generated by the coil of the relay and discharging to the control circuit.

[0059] As a possible implementation manner, Figure 5 Another structure diagram of the absorption circuit provided by the embodiment of the utility model, refer to Figure 5 As shown in the figure, further comprising: a freewheeling module.

[0060] One end of the freewheeling module is connected with the other end of the unidirectional conduction module, and the other end of the freewheeling module is connected with the control circuit.

[0061] Optionally, the freewheeling module is used for providing a current path to prevent the generation of high-voltage spikes and protect other circuit elements.

[0062] As a possible implementation manner, Figure 6 Another structural schematic diagram of the absorption circuit is provided in the embodiment of the utility model, referring to Figure 6 On the basis of Figure 5 The freewheeling module comprises a second diode D2.

[0063] The anode of the second diode D2 is connected with the other end of the unidirectional conduction module, and the other end of the second diode D2 is connected with the control circuit.

[0064] Optionally, the second diode D2 is used for providing a current path to prevent the generation of high-voltage spikes, protecting other circuit elements, and also for protecting other elements in the circuit from reverse voltage or transient voltage damage.

[0065] It is worth noting that the absorption circuit provided by the utility model can be applied to any scene that needs to absorb the energy generated by the relay coil, for example: inverters, frequency converters, switching power supplies and other electronic power equipment, and the following will be described taking the inverter as an example.

[0066] Based on the same inventive concept, the utility model also provides an inverter, Figure 7 A structural schematic diagram of the inverter is provided in the embodiment of the utility model, referring to Figure 7 On the basis of Figure 2 The inverter comprises the above-mentioned absorption circuit, control circuit, drive circuit, power circuit and relay.

[0067] Among them, the relay comprises a coil and a switch.

[0068] Optionally, the control circuit is used for adjusting the signal of the inverter and controlling the on-off state of the thyristor or field effect transistor in the inverter, and the control circuit is also used for generating a high-frequency driving pulse signal to drive the semiconductor device in the power circuit, and the control circuit is also used for protecting the inverter.

[0069] Optionally, the drive circuit is used for amplifying and converting the signal output by the control circuit and driving the switch tube, thereby realizing accurate control of the output current and voltage of the inverter.

[0070] Optionally, the power circuit is used for converting a direct-current power supply into an alternating-current output, and accurately adjusting the output voltage and current according to the instruction of the control circuit, thereby realizing the function of the inverter.

[0071] Optionally, the relay is used for controlling the conduction and turn-off of the power circuit.

[0072] By setting the absorbing circuit, the control circuit, the driving circuit, the power circuit and the relay in the inverter, efficient electric energy conversion, accurate output control, multiple protection and intelligent control can be realized, thereby improving the performance, stability and safety of the inverter.

[0073] As a possible implementation, with reference to Figure 7 The control circuit at least includes one of a digital signal processor (DSP), an ARM energy management control circuit and an analog-digital chip auxiliary power supply circuit.

[0074] Optionally, the DSP can include an SCI interface circuit, an EEPROM circuit, a current sampling circuit, a rotating speed detection circuit and a DC detection circuit.

[0075] Optionally, the ARM energy management control circuit dynamically adjusts the performance and power consumption of the processor by monitoring parameters such as the activity state, power consumption level and temperature of the processor.

[0076] Optionally, the analog-digital chip auxiliary power supply circuit has functions such as providing stable power supply, reducing noise interference, protecting chip safety, optimizing system performance, adapting to different application scenarios and realizing power-on sequence control.

[0077] As a possible implementation, with reference to Figure 7 The switch of the relay is connected with the power circuit.

[0078] Optionally, the control circuit controls the conduction and the turn-off of the power circuit by controlling the conduction and the turn-off of the switch of the relay.

[0079] As a possible implementation, with reference to Figure 7 The power circuit at least includes one of a direct current converter (DC / DC), a direct alternating current converter (DC / AC), an alternating current converter (AC / AC) and an alternating current-direct current converter (AC / DC).

[0080] Optionally, the DC / DC is used to convert the input direct current voltage into a variable direct current voltage.

[0081] Optionally, the DC / AC is used to convert the input direct current voltage into a variable alternating current voltage.

[0082] Optionally, the AC / DC is used to convert the input alternating current voltage into a variable direct current voltage.

[0083] Optionally, the AC / AC is used to convert the input alternating current voltage into a variable alternating current voltage.

[0084] As a possible implementation, with reference toFigure 7 As shown, one end of the coil is connected with the driving circuit, and the driving circuit comprises a triode.

[0085] Optionally, the driving circuit is used to provide necessary current and voltage for the coil to generate a sufficient magnetic field to drive the relay. When the driving circuit receives a signal from the control circuit, it will provide the required current and voltage for the coil, so that the coil generates a magnetic field and drives the relay to work. In this way, the control circuit can control the switching state of the relay through the driving circuit and the coil, thereby realizing the control of other circuits.

[0086] Optionally, the driving circuit comprises a triode, and the triode controls the on-off of the driving circuit by turning on and off.

[0087] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An absorbing circuit, characterized by, Comprising: a unidirectional conductive module and an energy storage module; one end of the unidirectional conductive module is used to connect one end of a coil of a relay and one end of a driving circuit, the other end of the unidirectional conductive module is connected with one end of the energy storage module and a control circuit, the other end of the energy storage module is connected with the control circuit; the unidirectional conductive module is used to transfer energy generated by the coil of the relay to the energy storage module when a switch of the relay is turned off, so as to charge the energy storage module; the energy storage module is used to discharge to the control circuit.

2. The absorption circuit of claim 1, wherein the unidirectional conductive module comprises a first diode; an anode of the first diode is used to connect one end of a coil of a relay and one end of a driving circuit, a cathode of the first diode is connected with one end of an energy storage module and a control circuit.

3. The absorption circuit of claim 1, wherein, the energy storage module comprises a capacitor; one end of the capacitor is connected with the other end of the unidirectional conductive module and a control circuit, the other end of the capacitor is connected with the control circuit.

4. The absorption circuit of claim 1, wherein Further comprising: a freewheeling module; one end of the freewheeling module is connected with the other end of the unidirectional conductive module, the other end of the freewheeling module is connected with the control circuit.

5. The absorption circuit of claim 4, wherein, the freewheeling module comprises a second diode; an anode of the second diode is connected with the other end of the unidirectional conductive module, the other end of the second diode is connected with the control circuit.

6. An inverter, characterized by comprising: Comprising: the absorption circuit, the control circuit, the driving circuit, the power circuit and the relay of any one of claims 1-5; the relay comprises a coil and a switch.

7. The inverter of claim 6, wherein, the control circuit at least comprises one of the following: a digital signal processor, an ARM energy management control circuit and an analog-digital chip auxiliary power supply circuit.

8. The inverter of claim 6, wherein, the switch of the relay is connected with the power circuit.

9. The inverter of claim 8, wherein, the power circuit at least comprises one of the following: a direct current converter, an alternating current converter, an alternating current converter and an alternating current-direct current converter.

10. The inverter of claim 6, wherein, one end of the coil is connected with the driving circuit, and the driving circuit comprises a triode.

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