Three-phase input sleep wake-up circuit and device

Abstract

The utility model relates to a three-phase input dormancy wake-up circuit and equipment. The three-phase input dormancy wake-up circuit comprises a pre-charging module, a control module and an auxiliary module. The pre-charging module is used for executing dormancy or awakening operation, so that the circuit is in a dormancy state or an awakening state; the control module is connected with the pre-charging module and is used for controlling the pre-charging module to execute dormancy or awakening operation; and the auxiliary module is connected with the control module and is used for supplying power to the control module when the circuit is in the dormant state or the wake-up state. The circuit can significantly reduce the active power consumption, and achieves the close zero reactive power consumption when the circuit is dormant. Meanwhile, circuit devices are protected through the pre-charging module, and safe awakening of the circuit is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of power electronics, in particular to a three-phase input hibernation wake -up circuit and equipment. BACKGROUND

[0002] With the continuous development of power electronics, three-phase input circuit has been widely applied in various power supply equipment. The traditional three-phase input circuit is mainly composed of EMC (Electromagnetic Compatibility) filter circuit, PFC (Power Factor Correction) boost circuit and the like.

[0003] However, in standby state, the three-phase input circuit has active power loss of power devices, and part of the devices has reactive current, causing reactive power loss, which causes energy waste. SUMMARY

[0004] Therefore, it is necessary to provide a three-phase input hibernation wake-up circuit and equipment capable of solving the problem of energy waste of three-phase input circuit in standby state, realizing low-power operation and improving the energy-saving performance of the circuit.

[0005] In a first aspect, the utility model provides a three-phase input hibernation wake-up circuit, which comprises:

[0006] A pre-charging module is used to perform hibernation or wake-up operation to make the circuit in hibernation state or wake-up state.

[0007] A control module is connected with the pre-charging module and used to control the pre-charging module to perform hibernation or wake-up operation.

[0008] An auxiliary module is connected with the control module and used to supply power to the control module when the circuit is in hibernation state or wake-up state.

[0009] In one embodiment, the circuit further comprises:

[0010] An input module is connected with the pre-charging module and the filter boost module respectively and used to input three-phase alternating current.

[0011] A filter boost module is connected with the pre-charging module and the output module respectively and used to correct the power factor of three-phase alternating current and transmit the corrected three-phase alternating current to the output module.

[0012] An output module is connected with the auxiliary module and used to supply power to the auxiliary module.

[0013] In one of the embodiments, the pre-charging module includes a first pre-charging resistor, a second pre-charging resistor, a first diode, a first main power relay, a second main power relay and a pre-charging relay, the first pre-charging resistor is connected in parallel with the first main power relay and in series with the pre-charging relay, the second pre-charging resistor is connected in series with the pre-charging relay and in parallel with the second main power relay, the anode of the first diode is connected with the second pre-charging resistor, and the first main power relay, the second main power relay and the pre-charging relay are connected to the filter and booster module respectively.

[0014] The input module includes an A-phase input end, a B-phase input end, a C-phase input end and a ground port, the A-phase input end is connected with the first pre-charging resistor and the first main power relay respectively, the B-phase input end is connected with the second pre-charging resistor and the second main power relay respectively, and the C-phase input end is connected with the filter and booster module.

[0015] The output module includes a positive output end, a negative output end and an output capacitor, the output capacitor is connected with the positive output end and the negative output end respectively, and the negative output end is connected with the cathode of the first diode.

[0016] In one of the embodiments, the filter and booster module includes a filter unit and a booster unit, the input end of the filter unit is connected with the output end of the pre-charging module, the output end of the filter unit is connected with the input end of the booster unit, and the output end of the booster unit is connected with the output module.

[0017] In one of the embodiments, the booster unit includes a first inductor, a second inductor, a third inductor and a booster circuit.

[0018] The first end of the first inductor, the second inductor and the third inductor is connected with the filter unit respectively, and the second end of the first inductor, the second inductor and the third inductor is connected with the booster circuit respectively.

[0019] In one of the embodiments, the control module is further configured to, in the case of receiving a sleep instruction or not receiving a start instruction within a preset time period, disconnect the first main power relay, the second main power relay and the pre-charging relay, so that the circuit is in a sleep state.

[0020] In one of the embodiments, the control module is further configured to, in the case of receiving a wake-up instruction or a start instruction, close the pre-charging relay; after closing the pre-charging relay, in the case of charging the output capacitor to a preset threshold value, disconnect the pre-charging relay, and turn on the first main power relay and the second main power relay, so that the circuit is in a wake-up state.

[0021] In one of the embodiments, the auxiliary module includes an auxiliary source circuit and a second diode.

[0022] The anode of the second diode is connected with the positive output end, and the cathode of the second diode is connected with the auxiliary source circuit.

[0023] In a second aspect, the utility model provides a kind of three-phase input dormancy wake-up device, including the three-phase input dormancy wake-up circuit of any one of the embodiment of the first aspect.

[0024] The three-phase input dormancy wake-up circuit and device described above, only let control module and auxiliary module work when circuit is dormant, significantly reduce active power consumption, realize near zero reactive power consumption when circuit is dormant;While protecting circuit device by pre-charging module, realize circuit safety wake-up. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be simply introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 It is a module structure of the three-phase input dormancy wake-up circuit of an embodiment;

[0027] Figure 2 It is a module structure of the three-phase input dormancy wake-up circuit of another embodiment;

[0028] Figure 3 It is the three-phase input dormancy wake-up circuit of a specific embodiment.

[0029] EXPLANATION OF REFERENCE NUMERALS:

[0030] 100, pre-charging module;200, control module;210, controller;300, auxiliary module;310, auxiliary source circuit;400, input module;500, filter boost module;510, filter unit;520, boost unit;521, boost circuit;600, output module;R1, first pre-charging resistance;R2, second pre-charging resistance;D1, first diode;D2, second diode;K1, first main power relay;K2, second main power relay;K3, pre-charging relay;C1, output capacitor;L1, first inductor;L2, second inductor;L3, third inductor. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the utility model, the utility model will be more fully described below with reference to relevant drawings. The embodiments of the utility model are shown in the drawings. However, the utility model can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0033] It is to be understood that the terms "first", "second", and etc. used in the present application can be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element. For example, without departing from the scope of the present application, a first resistor can be called a second resistor, and similarly, a second resistor can be called a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0034] It is to be understood that "connection" in the following embodiments, if the circuits, modules, units and the like connected to each other have the transmission of electrical signals or data, should be understood as "electrical connection", "communication connection" and the like.

[0035] As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. It is also to be understood that the term "comprising" or "including" or "having" and the like, specifies the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

[0036] With the continuous development of power electronic technology, three-phase input circuit has been widely used in various power supply devices. The traditional three-phase input circuit mainly consists of EMC filter circuit, PFC boost circuit and the like.

[0037] However, the three-phase input circuit has a certain energy waste problem in standby state. In standby state, the power devices of the three-phase input circuit work in uncontrolled rectification state, resulting in active loss of the circuit. The EMC filter capacitor and the bus capacitor in the three-phase input circuit always have reactive current flowing through in standby state, causing reactive loss. The above active loss and reactive loss cause the three-phase input circuit to be unable to realize low-power operation in standby state, resulting in serious energy waste problem.

[0038] The utility model provides a kind of three-phase input dormancy wake-up circuit, to solve the problem of energy waste of three-phase input circuit in standby state, realize low-power operation, improve the energy-saving performance of circuit;While protecting circuit device when circuit wakes up.

[0039] In one example embodiment, as shown in Figure 1 a three-phase input hibernation wake-up circuit is provided, including a pre-charge module 100, a control module 200 and an auxiliary module 300.

[0040] The pre-charge module 100 is configured to perform a hibernation operation or a wake-up operation to make the circuit in a hibernation state or a wake-up state.

[0041] The control module 200 is connected with the pre-charge module 100 and configured to control the pre-charge module 100 to perform the hibernation operation or the wake-up operation.

[0042] The auxiliary module 300 is connected with the control module 200 and configured to supply power to the control module 200 when the circuit is in the hibernation state or the wake-up state.

[0043] Optionally, the pre-charge module 100 is configured to perform the hibernation operation to control the current flow direction, cut off the input loop and make the circuit in the hibernation state. The pre-charge module 100 is also configured to perform the wake-up operation to pre-charge the circuit, reduce the current peak generated when the circuit wakes up, protect the devices of the circuit and make the circuit wake up safely.

[0044] The control module 200 is connected with the pre-charge module 100, and the control module 200 is configured to control the switch components in the pre-charge module 100 to perform the hibernation operation or the wake-up operation, thereby controlling the current flow direction and making the circuit in the hibernation state or the wake-up state.

[0045] When the circuit is in the hibernation state, the input loop is cut off. In order to make the circuit wake up, the control module 200 needs to work normally to accept the wake-up instruction, and therefore the auxiliary module 300 needs to supply power to the control module 200 when the circuit is in the hibernation state. In addition, when the circuit is in the wake-up state, the auxiliary module 300 draws power from the circuit to make the whole circuit work normally.

[0046] Optionally, when the control module 200 receives a hibernation instruction issued by a terminal device or the control module 200 does not receive a start-up instruction from the terminal device within a preset time length, the control module 200 controls the pre-charge module 100 to perform the hibernation operation to make the circuit in the hibernation state. For example, the preset time length can be 1 minute. When the control module 200 receives a start-up instruction or a wake-up instruction issued by the terminal device, the control module 200 controls the pre-charge module 100 to perform the wake-up operation to make the circuit in the wake-up state.

[0047] The three-phase input hibernation wake-up circuit described above only makes the control module 200 and the auxiliary module 300 work when the circuit is in the hibernation state, thereby significantly reducing the active power consumption of the circuit and realizing near-zero reactive power consumption when the circuit is in the hibernation state. At the same time, the pre-charge module 200 protects the devices of the circuit and makes the circuit wake up.

[0048] The utility model discloses three -phase input dormancy wake -up circuit's structure is specifically introduced in some embodiments below.

[0049] In an exemplary embodiment, as shown in Figure 2 The circuit further comprises an input module 400, a filter boost module 500 and an output module 600.

[0050] The input module 400 is connected with the pre-charging module 100 and the filter boost module 500 respectively, and is used for inputting three-phase alternating current.

[0051] The filter boost module 500 is connected with the pre-charging module 100 and the output module 600 respectively, and is used for correcting the power factor of the three-phase alternating current and transmitting the corrected three-phase alternating current to the output module 600.

[0052] The output module 600 is connected with the auxiliary module 300, and is used for supplying power to the auxiliary module 300.

[0053] Exemplarily, the input module 400 adopts three-phase four-wire access mode, receives external three-phase alternating current, and transmits the three-phase alternating current to the pre-charging module 100. In addition, the input module 400 is connected with the filter boost module 500, and when the circuit switch device has not started to work in the circuit dormant state, a certain current flow is established between phases, so as to reduce the voltage peak and current surge when the circuit starts, so as to realize safe start of the circuit.

[0054] The filter boost module 500 receives the three-phase alternating current from the input module 400, filters and corrects the three-phase alternating current, realizes AC (alternating current)-DC (direct current) conversion, and transmits the converted direct current to the output module 600.

[0055] The output module 600 outputs direct current that can be used by a load; at the same time, when the circuit is in the wake-up state, the output module 600 supplies power to the auxiliary module 300, releases the stored electric energy of the auxiliary module 300, and realizes normal work of the entire circuit.

[0056] In an exemplary embodiment, as shown in Figure 3 The pre-charging module 100 comprises a first pre-charging resistor R1, a second pre-charging resistor R2, a first diode D1, a first main power relay K1, a second main power relay K2 and a pre-charging relay K3. The first pre-charging resistor R1 is connected in parallel with the first main power relay K1 and in series with the pre-charging relay K3. The second pre-charging resistor R2 is connected in series with the pre-charging relay K3 and in parallel with the second main power relay K2. The anode of the first diode D1 is connected with the second pre-charging resistor R2. The first main power relay K1, the second main power relay K2 and the pre-charging relay K3 are connected with the filter boost module 500 respectively.

[0057] The input module 400 includes an A-phase input end, a B-phase input end, a C-phase input end and a grounding port. The A-phase input end is connected with the first pre-charge resistor R1 and the first main power relay K1 respectively. The B-phase input end is connected with the second pre-charge resistor R2 and the second main power relay K2 respectively. The C-phase input end is connected with the filter and boost module 500.

[0058] The output module 600 includes a positive output end, a negative output end and an output capacitor C1. The output capacitor C1 is connected with the positive output end and the negative output end respectively. The negative output end is connected with the cathode of the first diode D1.

[0059] Exemplarily, the output module 600 includes a positive output end +BUS, a negative output end -BUS and an output capacitor C1.

[0060] Exemplarily, the current is input from the B-phase input end, passes through the second pre-charge resistor R2, forms half-wave rectification through the first diode D1, and flows back to the C-phase input end through the negative output end -BUS and the internal diode of the filter and boost module. This mode can establish a certain current flow between the phases when the circuit switching device has not started to work, thereby helping to balance the capacitor voltage and improve the starting characteristics of the system, reducing the voltage spike and current surge during starting, and protecting the circuit elements.

[0061] In an exemplary embodiment, referring to Figure 3 The filter and boost module 500 includes a filter unit 510 and a boost unit 520. The input end of the filter unit 510 is connected with the output end of the pre-charge module 100. The output end of the filter unit 510 is connected with the input end of the boost unit 520. The output end of the boost unit 520 is connected with the output module 600.

[0062] Exemplarily, the filter unit 510 includes an EMC filter circuit, so that the circuit meets the electromagnetic compatibility standard, prevents the device from emitting interference signals to the outside, and also improves the anti-interference ability of the device to the outside.

[0063] In an exemplary embodiment, referring to Figure 3 The boost unit 520 includes a first inductor L1, a second inductor L2, a third inductor L3 and a boost circuit 521.

[0064] The first ends of the first inductor L1, the second inductor L2 and the third inductor L3 are connected with the filter unit 510 respectively. The second ends of the first inductor L1, the second inductor L2 and the third inductor L3 are connected with the boost circuit 521 respectively.

[0065] Exemplarily, the boost circuit 521 is a PFC (Power Factor Correction) boost circuit, which is used for power factor correction of a power supply system, can use electric energy more effectively, reduce the burden of the circuit, and reduce energy loss. The PFC boost circuit converts input alternating current (AC) into direct current (DC), and improves the power factor in the AC-DC conversion process.

[0066] In an exemplary embodiment, referring to Figure 3 , the control module 200 comprises:

[0067] The controller 210 is connected with the first main power relay K1, the second main power relay K2 and the pre-charge relay K3 respectively.

[0068] Exemplarily, the controller 210 is a DSP (Digital Signal Processor) controller. The controller 210 is also connected with a terminal device in isolation communication, which can be a personal computer PC terminal, a notebook computer, a workstation or the like intelligent device.

[0069] In an exemplary embodiment, referring to Figure 3 , the auxiliary module 300 comprises an auxiliary source circuit 310 and a second diode D2.

[0070] The anode of the second diode D2 is connected with the positive output end, and the cathode of the second diode D2 is connected with the auxiliary source circuit 310.

[0071] Exemplarily, the auxiliary source circuit 310 is a flyback auxiliary source circuit, which can support the sleep or wake-up operation of the circuit under light load conditions.

[0072] The following some embodiments specifically illustrate the sleep or wake-up mode of the circuit of the utility model.

[0073] In an exemplary embodiment, referring to Figure 3 , the control module 200 is also used for disconnecting the first main power relay K1, the second main power relay K2 and the pre-charge relay K3 in the case of receiving a sleep instruction or not receiving a start-up instruction within a preset time period, so as to make the circuit in a sleep state.

[0074] Exemplarily, the PC terminal represents the terminal device. When the PC terminal issues a sleep instruction or the DSP controller does not receive a start-up instruction from the PC terminal within a preset time period, the control circuit enters a sleep state, and the first main power relay K1, the second main power relay K2 and the pre-charge relay K3 are disconnected. Since the input circuit is cut off, no current flows through the power device, the EMC filter circuit and the output capacitor C1, which greatly reduces the active and reactive power loss.

[0075] In order to realize the external wake-up function, the DSP controller needs to work normally to accept the wake-up instruction, and therefore the auxiliary source circuit 310 needs to work normally to supply power to the DSP controller in the sleep state. The B-phase input passes through the second pre-charge resistor R2, forms half-wave rectification through the first diode D1, and flows back to the C-phase through the -BUS and the internal diode of the PFC boost circuit. At this time, the auxiliary source circuit 310 and the DSP controller work normally. Because the second diode D2 blocks the charging of the output capacitor C1, only the DSP controller and the weak electric device work, and the active power consumption is less than 10 W in the sleep state, and the reactive power consumption is close to zero in the sleep state.

[0076] In an exemplary embodiment, the control module 200 is further configured to, in the case of receiving a wake-up instruction or a start-up instruction, close the pre-charge relay K3; after closing the pre-charge relay K3, in the case of charging the output capacitor C1 to a preset threshold, open the pre-charge relay K3, and turn on the first main power relay K1 and the second main power relay K2, so that the circuit is in a wake-up state.

[0077] Exemplarily, when the PC end issues a wake-up or start-up instruction, the DSP controller first closes the pre-charge relay K3. At this time, the input current passes through the first pre-charge resistor R1 and the second pre-charge resistor R2, and then passes through the non-controlled rectification state of the PFC boost circuit to charge the output capacitor C1. The non-controlled rectification refers to the process of converting an alternating current (AC) electrical signal into a direct current (DC) electrical signal using a diode without any additional control. This measure can effectively reduce the current peak generated at the moment of closing the K1 and K2 relays, thereby protecting the circuit devices. At this time, the auxiliary source circuit 310 draws electricity from the output capacitor C1 through the D2 diode, and the entire system works normally. When the output capacitor C1 is charged to a specific threshold, the pre-charge relay K3 is opened, the first main power relay K1 and the second main power relay K2 are closed, the main power circuit works normally, and the conversion of the circuit from the wake-up state or the AC-DC circuit is realized.

[0078] In an exemplary embodiment, a three-phase input sleep wake-up device is provided, which includes the three-phase input sleep wake-up circuit according to any one of the above circuit embodiments.

[0079] It can be understood that the three-phase input sleep wake-up circuit can also adopt other forms, which are not limited to the forms mentioned in the above embodiments, as long as it can achieve the functions of completing the sleep and safe wake-up of the three-phase input circuit.

[0080] In addition, although flip-flops triggered along are used in the above embodiments, flip-flops triggered by levels can be used alternatively.

[0081] In the description of the specification, the description referring to the terms "some embodiments", "other embodiments", "ideal embodiments", and the like means that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0082] The technical features of the above-described embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not contradict each other, they should be considered as the scope of the present application.

[0083] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A three-phase input hibernate wake-up circuit, characterized by, The application relates to a power supply circuit, which comprises the following modules: a pre-charging module for performing a sleep or wake-up operation to make the circuit in a sleep state or a wake-up state; a control module connected with the pre-charging module for controlling the pre-charging module to perform the sleep or wake-up operation; an auxiliary module connected with the control module for supplying power to the control module when the circuit is in the sleep state or the wake-up state; an input module connected with the pre-charging module and a filter and booster module respectively for inputting three-phase alternating current; a filter and booster module connected with the pre-charging module and the output module respectively for performing power factor correction on the three-phase alternating current and transmitting the corrected three-phase alternating current to the output module; an output module connected with the auxiliary module for supplying power to the auxiliary module; wherein the output module comprises a positive output end, the auxiliary module comprises an auxiliary source circuit and a second diode, the anode of the second diode is connected with the positive output end, and the cathode of the second diode is connected with the auxiliary source circuit.

2. The three-phase input hibernate wake circuit of claim 1, wherein, The pre-charging module comprises a first pre-charging resistor, a second pre-charging resistor, a first diode, a first main power relay, a second main power relay and a pre-charging relay, the first pre-charging resistor is connected with the first main power relay in parallel and connected with the pre-charging relay in series, the second pre-charging resistor is connected with the pre-charging relay in series and connected with the second main power relay in parallel, the anode of the first diode is connected with the second pre-charging resistor, and the first main power relay, the second main power relay and the pre-charging relay are connected with the filter and booster module respectively. The input module comprises an A-phase input end, a B-phase input end, a C-phase input end and a grounding port, the A-phase input end is connected with the first pre-charging resistor and the first main power relay respectively, the B-phase input end is connected with the second pre-charging resistor and the second main power relay respectively, and the C-phase input end is connected with the filter and booster module. The output module further comprises a negative output end and an output capacitor, the output capacitor is connected with the positive output end and the negative output end respectively, and the negative output end is connected with the cathode of the first diode.

3. The three-phase input hibernate wake circuit of claim 1, wherein, The filter and booster module comprises a filter unit and a booster unit, the input end of the filter unit is connected with the output end of the pre-charging module, the output end of the filter unit is connected with the input end of the booster unit, and the output end of the booster unit is connected with the output module.

4. The three-phase input hibernate wake circuit of claim 3, wherein, The booster unit comprises a first inductor, a second inductor, a third inductor and a booster circuit. The first end of the first inductor, the second inductor and the third inductor is connected with the filter unit respectively, and the second end of the first inductor, the second inductor and the third inductor is connected with the booster circuit respectively.

5. The three-phase input hibernate wake circuit of claim 2, wherein, The control module comprises: a controller connected with the first main power relay, the second main power relay and the pre-charging relay respectively.

6. The three-phase input hibernate wake circuit of claim 2, wherein, The control module is further configured to, in a case where a sleep instruction is received or no start instruction is received within a preset time period, disconnect the first main power relay, the second main power relay, and the pre-charge relay, so that the circuit is in a sleep state.

7. The three-phase input hibernate wake circuit of claim 2, wherein, The control module is further configured to, in a case where a wake-up instruction or a start instruction is received, close the pre-charge relay; after the pre-charge relay is closed, in a case where the output capacitor is charged to a preset threshold, disconnect the pre-charge relay, and turn on the first main power relay and the second main power relay, so that the circuit is in a wake-up state.

8. A three-phase input hibernate wake-up device, characterized by, A three-phase input sleep wake-up circuit comprising any one of claims 1-7.

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