Control device of circuit breaker and circuit breaker system

Abstract

The utility model provides a control device of a circuit breaker and a circuit breaker system. The control device of the circuit breaker comprises a commercial power supply processing unit, a commercial power on-off control unit, a main control unit, a manual trigger unit and an auxiliary power supply unit. The commercial power supply processing unit and the commercial power on-off control unit are connected in series between the commercial power and the power supply end of the main control unit; the commercial power on-off control unit is used for controlling the on-off of a line between the commercial power and the power supply end of the main control unit under the driving of the main control unit; the auxiliary power supply unit is electrically connected with the power supply end of the commercial power on-off control unit and the power supply end of the manual trigger unit, and is used for providing working voltage for the manual trigger unit and the commercial power on-off control unit; and the manual trigger unit is electrically connected with the mains supply on-off control unit and is used for driving the mains supply on-off control unit to control on-off of a line between the mains supply and the power supply end of the main control unit when the main control unit is in a power-off state. And the whole circuit breaker system can be recovered from a dead halt state and can work normally.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a control device and system for a circuit breaker. Background Technology

[0002] The external circuit breaker of a smart energy meter is a key component for enabling remote fee control functions in conjunction with IoT energy meters. It is an important link in promoting the digital transformation of electricity information collection and management. Specifically, it includes the circuit breaker actuator and the circuit breaker control device.

[0003] In the control device of a circuit breaker, a corresponding mains power on / off control unit is usually set up to control the connection and disconnection between the mains power and the power supply terminal of the main control unit. Since the timing sequence of the circuit breaker is: mains power supply > main control unit power supply > mains power on / off control unit action, the mains power on / off control unit must be in the on state by default before the circuit breaker is powered on.

[0004] However, if the circuit breaker's internal mains power on / off control unit is disconnected due to a strong impact or vibration during production or transportation, and then power is applied to the circuit breaker, the mains power cannot supply power to the main control unit because the mains power on / off control unit is disconnected. Consequently, the mains power on / off control unit cannot be driven by the main control unit and therefore cannot close, leaving the entire circuit breaker in a frozen state and unable to function properly. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the present invention provides a control device and circuit breaker system for a circuit breaker.

[0006] In one embodiment, the present invention provides a control device for a circuit breaker, the control device for the circuit breaker including a mains power supply processing unit, a mains power on / off control unit, a main control unit, a manual triggering unit and an auxiliary power supply unit;

[0007] The mains power supply processing unit and the mains power on / off control unit are connected in series between the mains power supply and the power supply terminal of the main control unit. The mains power on / off control unit is used to control the connection and disconnection of the line between the mains power supply and the power supply terminal of the main control unit under the drive of the main control unit.

[0008] The auxiliary power supply unit is electrically connected to the power supply terminal of the mains power on / off control unit and the power supply terminal of the manual trigger unit, respectively, and is used to provide working voltage to the manual trigger unit and the mains power on / off control unit;

[0009] The manual trigger unit is electrically connected to the mains power on / off control unit and is used to drive the mains power on / off control unit to control the connection and disconnection of the line between the mains power and the power supply terminal of the mains power when the main control unit is in the power-off state.

[0010] In one embodiment, the manual triggering unit includes a manual switch, a first capacitor, and a bleed resistor;

[0011] The first terminal of the manual switch is used to connect to the working voltage. The second terminal of the manual switch is electrically connected to the first terminal of the first capacitor and the first terminal of the bleeder resistor respectively. The second terminal of the first capacitor is electrically connected to the mains power on / off control unit. The second terminal of the bleeder resistor is grounded.

[0012] The manual trigger unit is used to drive and control the mains power supply control unit according to the voltage level of the first capacitor during the charging and discharging phase.

[0013] In one embodiment, the manual switch includes a DIP switch;

[0014] The first terminal of the DIP switch is used to connect to the working voltage. The second terminal of the DIP switch is electrically connected to the first terminal of the first capacitor, the first terminal of the bleeder resistor, and the output terminal of the mains power supply processing unit. The third terminal of the DIP switch is electrically connected to the main control unit.

[0015] A DIP switch is used to control the continuity of the circuit between its second and first terminals or between its second and third terminals.

[0016] The main control unit is used to determine the on / off state of the DIP switch based on the detection signal received from the third terminal of the DIP switch.

[0017] In one embodiment, the manual switch includes a DIP switch;

[0018] The first terminal of the DIP switch is electrically connected to the first terminal of the first capacitor and the first terminal of the bleeder resistor, the second terminal of the DIP switch is electrically connected to the output terminal of the mains power supply processing unit and is used to input the working voltage, and the third terminal of the DIP switch is electrically connected to the main control unit.

[0019] A DIP switch is used to control the continuity of the circuit between its second and first terminals or between its second and third terminals.

[0020] The main control unit is used to determine the on / off state of the DIP switch based on the detection signal received from the third terminal of the DIP switch.

[0021] In one embodiment, the first terminal of the first capacitor and the first terminal of the bleeder resistor are also electrically connected to the main control unit, respectively.

[0022] The main control unit is used to control the first capacitor to be fully charged when it is powered on.

[0023] In one embodiment, the manual triggering unit further includes a first anti-reverse diode and a second anti-reverse diode;

[0024] The DIP switch is connected to the operating voltage through the first anti-reverse diode, and the DIP switch is electrically connected to the output terminal of the mains power supply processing unit through the second anti-reverse diode.

[0025] In one embodiment, the manual triggering unit further includes a first current-limiting resistor and a second current-limiting resistor;

[0026] The DIP switch is electrically connected to the output terminal of the mains power supply processing unit through the first current-limiting resistor, and the DIP switch is electrically connected to the main control unit through the second current-limiting resistor.

[0027] In one embodiment, the manual trigger unit further includes a bidirectional TVS diode, a pull-down resistor, and a second capacitor;

[0028] The first anode of the bidirectional TVS diode, the first terminal of the pull-down resistor, and the first terminal of the second capacitor are electrically connected to the third terminal of the DIP switch, respectively. The second anode of the bidirectional TVS diode, the second terminal of the pull-down resistor, and the second terminal of the second capacitor are grounded, respectively.

[0029] In one embodiment, the auxiliary power supply unit includes an energy storage unit and an energy storage power supply processing unit;

[0030] The output terminal of the energy storage unit is electrically connected to the input terminal of the energy storage power supply processing unit. The output terminal of the energy storage power supply processing unit is electrically connected to the power supply terminal of the manual triggering unit and the power supply control unit, respectively, to provide operating voltage to the manual triggering unit and the power supply control unit.

[0031] In one embodiment, the mains power on / off control unit includes a magnetic latching relay and an H-bridge drive circuit;

[0032] The first end of the contact in the magnetic latching relay is electrically connected to the output end of the mains power supply processing unit, the second end of the contact in the magnetic latching relay is electrically connected to the power supply end of the main control unit, the first end of the coil in the magnetic latching relay is electrically connected to the first input end of the H-bridge drive circuit, the second end of the coil in the magnetic latching relay is electrically connected to the second input end of the H-bridge drive circuit, and the third and fourth input ends of the H-bridge drive circuit are respectively electrically connected to the auxiliary power supply unit.

[0033] The first driving terminal of the H-bridge drive circuit is electrically connected to the first output terminal of the main control unit, and the second driving terminal of the H-bridge drive circuit is electrically connected to the second output terminal of the main control unit and the output terminal of the manual trigger unit, respectively.

[0034] Secondly, in one embodiment, the present invention provides a circuit breaker system, including an actuator for the circuit breaker and a control device for the circuit breaker in any of the above embodiments.

[0035] The actuator of the circuit breaker is electrically connected to the main control unit in the circuit breaker's control unit, and is used to open and close the circuit under the drive of the main control unit.

[0036] By adding a manual triggering unit to the control device and circuit breaker system of the aforementioned circuit breaker, when the mains power on / off control unit is in the open state due to collision or vibration, although the main control unit cannot drive the mains power on / off control unit to the on state because it cannot be powered on, the manual triggering unit can serve as a backup solution. It can drive the mains power on / off control unit to the on state when the main control unit is powered off, thereby powering on the main control unit and restoring the entire circuit breaker from the dead state so that it can work normally. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the control device of the circuit breaker in one embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the control device of a circuit breaker including a manual triggering unit in one embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of the specific circuit implementation of the manual triggering unit in one embodiment of the present invention;

[0041] Figure 4 This is a schematic diagram of the specific circuit implementation of the manual triggering unit in another embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram of the specific circuit implementation of the mains power on / off control unit in one embodiment of the present invention;

[0043] Figure 6 This is a schematic diagram of the specific circuit implementation of the rectifier unit in one embodiment of the present invention;

[0044] Figure 7 This is a schematic diagram of the control device for a circuit breaker that includes an energy storage power supply processing unit in one embodiment of the present invention.

[0045] Figure 8 This is a schematic diagram of the specific circuit implementation of the energy storage power supply processing unit in one embodiment of the present invention. Detailed Implementation

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0047] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified. In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use this invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of this invention with unnecessary detail. Therefore, this invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0048] Firstly, such as Figure 1 As shown, in one embodiment, the present invention provides a control device for a circuit breaker, which includes a mains power supply processing unit, a mains power on / off control unit, a main control unit, a manual triggering unit, and an auxiliary power supply unit.

[0049] exist Figure 1In this circuit, the mains power supply processing unit and the mains power on / off control unit are connected in series between the mains power supply and the power supply terminal of the main control unit. The mains power on / off control unit is used to control the connection and disconnection of the line between the mains power supply and the power supply terminal of the main control unit under the drive of the main control unit.

[0050] The mains power supply processing unit is used to process the mains power, including rectification and voltage reduction, to obtain a power supply that meets the power requirements of the main control unit and other loads.

[0051] The main control unit can be a Bluetooth SOC (System on Chip), which is an integrated circuit chip that integrates all the necessary computer and wireless communication functions onto a single silicon chip. These functions include a processor, memory, input / output (I / O) interfaces, and a Bluetooth wireless communication module.

[0052] Under normal circumstances, the mains power on / off control unit remains in a conducting state before the circuit breaker is powered on. After the circuit breaker is powered on, the mains power can be transmitted to the power supply terminal of the main control unit through the mains power supply processing unit and the mains power on / off control unit, thus enabling the main control unit to power on and start based on the mains power. However, if the mains power on / off control unit is disconnected due to a collision or vibration, after the circuit breaker is powered on, the mains power cannot be transmitted to the power supply terminal of the main control unit through the mains power on / off control unit, thus preventing the main control unit from starting.

[0053] The manual trigger unit is electrically connected to the mains power on / off control unit and is used to drive the mains power on / off control unit to control the connection and disconnection of the line between the mains power and the power supply terminal of the mains power when the main control unit is in the power-off state.

[0054] The manual triggering unit can achieve the same drive control function as the main control unit under the operation of the operator, so as to play the purpose of manual drive control when the main control unit cannot drive the mains power on / off control unit.

[0055] The auxiliary power supply unit is electrically connected to the power supply terminals of the mains power on / off control unit and the manual trigger unit, respectively, and is used to provide operating voltage to the manual trigger unit and the mains power on / off control unit.

[0056] The mains power on / off control unit and the manual triggering unit typically require a corresponding operating voltage to function properly. Therefore, even when the mains power on / off control unit is in the off state, it still needs to be able to receive the operating voltage to ensure it can be turned on under the manual drive control of the manual triggering unit. This necessitates ensuring that the operating voltage supplied to the mains power on / off control unit and the manual triggering unit is stable and reliable, preventing it from being drawn from the output of the mains power on / off control unit. In other words, a corresponding auxiliary power supply unit is required to provide a stable and reliable operating voltage. Specifically, the operating voltage supplied to the mains power on / off control unit and the manual triggering unit can still originate from the mains power, but an additional corresponding power supply processing unit is needed. This unit is not subject to the on / off control of the mains power on / off control unit, so that when the circuit breaker is powered on, the mains power on / off control unit and the manual triggering unit are powered on according to the supplied mains power, ensuring their normal operation.

[0057] Through the control device of the circuit breaker, when the mains power on / off control unit is in the open state due to collision or vibration, although the main control unit cannot drive the mains power on / off control unit to the on state because it cannot be powered on, the manual trigger unit can be used as a backup solution. It can drive the mains power on / off control unit to the on state when the main control unit is powered off, thereby powering on the main control unit and restoring the entire circuit breaker from the dead state so that it can work normally.

[0058] like Figure 2 As shown, in one embodiment, the manual triggering unit includes a manual switch, a first capacitor C1, and a bleeder resistor R18.

[0059] exist Figure 2 In the circuit, the first terminal of the manual switch is used to connect to the working voltage, the second terminal of the manual switch is electrically connected to the first terminal of the first capacitor C1 and the first terminal of the bleeder resistor R18, the second terminal of the first capacitor C1 is electrically connected to the mains power on / off control unit, and the second terminal of the bleeder resistor R18 is grounded.

[0060] The manual trigger unit is used to drive and control the mains power supply control unit according to the voltage level of the first capacitor C1 during the charging and discharging phase.

[0061] When the manual switch is in the off state for an extended period, the presence of the bleeder resistor R18 prevents the first capacitor C1 from storing any charge. The first capacitor C1 then outputs a low-level signal to the mains power on / off control unit, keeping the control unit in the off state. When the manual switch is in the on state for an extended period, the applied operating voltage has fully charged the first capacitor C1, resulting in charge stored on it, but the voltage between its plates has stabilized. The first capacitor C1 then outputs a low-level signal to the mains power on / off control unit, keeping it in the off state. When the manual switch switches from the off state to the on state, the applied operating voltage charges the first terminal of the first capacitor C1. Utilizing the characteristic that the voltage across a capacitor cannot change abruptly, this raises the voltage at the second terminal of the first capacitor C1 until the charging phase ends. This allows the first capacitor C1 to output a high-level signal to the mains power on / off control unit during the charging phase, keeping the control unit in the on state. When the manual switch switches from the on state to the off state, the discharge resistor R18 discharges the charge stored on the first capacitor C1 until the discharge phase ends. Then, the first capacitor C1 outputs a low level to the mains power on / off control unit so that the mains power on / off control unit is in the off state.

[0062] Therefore, when the mains power supply control unit is disconnected due to collision or vibration, the operator can operate the manual switch several times to ensure that at least once it switches from the disconnected state to the on state, and then output a high level to the mains power supply control unit to drive the mains power supply control unit to turn on.

[0063] like Figure 3 As shown, in one embodiment, the manual switch includes a DIP switch SW1.

[0064] exist Figure 3 In this circuit, the first terminal of the DIP switch SW1 is used to connect the working voltage BATTERY_3V3. The second terminal of the DIP switch SW1 is electrically connected to the first terminal of the first capacitor C1, the first terminal of the bleeder resistor R18, and the output terminal of the mains power supply processing unit to connect the working voltage DCDC_3V5. The third terminal of the DIP switch SW1 is electrically connected to the main control unit to output the detection signal A / M. The second terminal of the first capacitor C1 is electrically connected to the mains power on / off control unit to output the drive signal PB2.

[0065] The DIP switch SW1 is used to control the connection between its second and first terminals or between its second and third terminals.

[0066] The main control unit is used to determine the switching state of the DIP switch SW1 based on the detection signal A / M input from the third terminal of the DIP switch SW1.

[0067] When the mains power on / off control unit is in the on state, it can output the operating voltage DC-DC_3V5. If the DIP switch SW1 is connected between its second and third terminals, the main control unit can receive a high-level detection signal A / M. If the DIP switch SW1 is connected between its second and first terminals, the main control unit can receive a low-level detection signal A / M. This allows the operator to not only implement the system recovery function based on the DIP switch SW1, but also to give relevant instructions to the main control unit by controlling the level of the detection signal A / M, such as indicating the control mode. Specifically, a high-level detection signal A / M can be predefined to represent manual mode, and a low-level detection signal A / M can represent automatic mode. When the main control unit receives the detection signal A / M, it can determine the mode to be executed based on its level.

[0068] like Figure 4 As shown, in one embodiment, the manual switch includes a DIP switch SW1.

[0069] exist Figure 4 In this circuit, the first terminal of the DIP switch SW1 is electrically connected to the first terminal of the first capacitor C1 and the first terminal of the bleeder resistor R18, respectively. The second terminal of the DIP switch SW1 is electrically connected to the output terminal of the mains power supply processing unit to receive the working voltage DC-DC_3V5 and the working voltage BATTERY_3V3. The third terminal of the DIP switch SW1 is electrically connected to the main control unit to output the detection signal A / M. The second terminal of the first capacitor C1 is electrically connected to the mains power on / off control unit to output the drive signal PB2.

[0070] The DIP switch SW1 is used to control the connection between its second and first terminals or between its second and third terminals.

[0071] The main control unit is used to determine the switching state of the DIP switch based on the detection signal A / M input from the third terminal of the DIP switch SW1.

[0072] in, Figure 3 The difference between the embodiments shown is that, Figure 4 The illustrated embodiment uses the second terminal of the DIP switch SW1 connected to the operating voltage BATTERY_3V3, instead of... Figure 3 The illustrated embodiment uses the first terminal of the DIP switch SW1 for connection. The operating voltage BATTERY_3V3 is more stable than the operating voltage DCDC_3V5 and is not controlled by the mains power on / off control unit. This allows the DIP switch SW1 to output different levels of detection signals A / M based on the connected operating voltage BATTERY_3V3 and the corresponding switch state, regardless of whether the operating voltage DCDC_3V5 can be connected. Figure 3The illustrated embodiment cannot be achieved using only the operating voltage DC-CDC_3V5.

[0073] like Figure 4 As shown, in one embodiment, the first terminal of the first capacitor C1 and the first terminal of the bleeder resistor R18 are also electrically connected to the main control unit to receive the control signal CD.

[0074] The main control unit is used to control the first capacitor C1 to be fully charged when it is powered on.

[0075] Among them, Figure 3 In the process, when the DIP switch SW1 is connected to its second and third terminals and the mains power on / off control unit can output the working voltage DC-CDC_3V5, the first capacitor C1 will enter the charging stage, causing it to output a high-level drive signal PB2, resulting in malfunction. Alternatively, when the DIP switch SW1 is connected to its second and first terminals and the mains power on / off control unit can output the working voltage DC-CDC_3V5, if the amplitude of the working voltage DC-CDC_3V5 is higher than the working voltage BATTERY_3V3, the first capacitor C1 will enter the charging stage, causing it to output a high-level drive signal PB2, resulting in malfunction.

[0076] Among them, Figure 4 In the process, when the DIP switch SW1 connects its second and first terminals and the mains power on / off control unit can output the working voltage DCC_3V5, if the amplitude of the working voltage DCC_3V5 is higher than the working voltage BATTERY_3V3, the first capacitor C1 will enter the charging stage, causing it to output a high-level drive signal PB2, resulting in malfunction.

[0077] In summary, the sudden connection of the operating voltage DC-CDC_3V5 can easily cause malfunctions. Therefore, in this embodiment, to address this issue, after the circuit breaker is operating normally, the main control unit outputs a high-level control signal CD to the first capacitor C1 to ensure that the first capacitor C1 is fully charged. At this time, regardless of whether the operating voltage DC-CDC_3V5 is connected or how the DIP switch SW1 is operated, the level of the drive signal PB2 will no longer change.

[0078] like Figure 3 or Figure 4 As shown, in one embodiment, the manual triggering unit further includes a first anti-reverse diode D7 and a second anti-reverse diode D6.

[0079] exist Figure 3 or Figure 4In the process, the DIP switch SW1 is connected to the working voltage BATTERY_3V3 through the first anti-reverse diode D7, and the DIP switch SW1 is electrically connected to the output terminal of the mains power supply processing unit through the second anti-reverse diode D6 to connect to the working voltage DCCDC_3V5.

[0080] Among them, the first anti-reverse diode D7 and the second anti-reverse diode D6 are both used to prevent current backflow.

[0081] like Figure 3 or Figure 4 As shown, in one embodiment, the manual triggering unit further includes a first current-limiting resistor R17 and a second current-limiting resistor R20.

[0082] exist Figure 3 or Figure 4 In the process, the DIP switch SW1 is electrically connected to the output terminal of the mains power supply processing unit through the first current limiting resistor R17 to receive the working voltage DCDC_3V5. The DIP switch SW1 is electrically connected to the main control unit through the second current limiting resistor R20 to output the detection signal A / M.

[0083] The first current-limiting resistor R17 and the second current-limiting resistor R20 are used to limit the current of the detection signal A / M output to the main control unit, so as to prevent the main control unit from burning out due to excessive current.

[0084] like Figure 3 or Figure 4 As shown, in one embodiment, the manual triggering unit further includes a bidirectional TVS diode D8, a pull-down resistor R19, and a second capacitor C2.

[0085] exist Figure 3 or Figure 4 In the circuit, the first anode of the bidirectional TVS diode D8, the first terminal of the pull-down resistor R19, and the first terminal of the second capacitor C2 are electrically connected to the third terminal of the DIP switch SW1, respectively. The second anode of the bidirectional TVS diode D8, the second terminal of the pull-down resistor R19, and the second terminal of the second capacitor C2 are grounded.

[0086] Among them, the bidirectional TVS diode D8 is used for electrostatic protection, the pull-down resistor R19 is used for voltage division, and the second capacitor C2 is used for high-frequency filtering.

[0087] In one embodiment, the mains power supply processing unit includes a rectifier unit and a step-down unit.

[0088] The rectifier unit includes an input terminal for connecting to mains power and an output terminal electrically connected to the input terminal of the buck unit. The buck unit also includes an output terminal electrically connected to the power supply terminal of the main control unit.

[0089] The AC mains output is high-amplitude AC power, such as 220VAC, while the main control unit typically requires low-amplitude DC power. Therefore, the AC mains power supply processing unit must include at least a rectifier unit and a step-down unit. Optionally, the rectifier unit can use rectifier diodes, and the step-down unit can use isolated or non-isolated switching power supply chips. After being processed by the rectifier and step-down units, the AC mains power is converted from high-amplitude AC power to low-amplitude DC power to meet the needs of the main control unit.

[0090] like Figure 5 As shown, in one embodiment, the mains power on / off control unit includes a magnetic latching relay K1 and an H-bridge drive circuit. The H-bridge drive circuit includes PMOS transistors Q2, Q3, Q4, and Q5, a voltage drop resistor R10, and a voltage drop resistor R8.

[0091] exist Figure 5 In the process, the first end of the contact of the magnetic latching relay K1 (i.e., pin 6 of the magnetic latching relay K1) is electrically connected to the output end of the rectifier unit to receive the power signal L1, and the second end of the contact of the magnetic latching relay K1 (i.e., pin 5 of the magnetic latching relay K1) is electrically connected to the input end of the step-down unit to output the power signal HV.

[0092] exist Figure 5 In the magnetic latching relay K1, the first terminal of the coil (i.e., pin 1 of the magnetic latching relay K1) is electrically connected to the first terminal of the voltage drop resistor R10 and the gate of the PMOS transistor Q2 through resistor R12. The drain of the PMOS transistor Q2 is electrically connected to the drain of the NMOS transistor Q5 and the second terminal of the coil of the magnetic latching relay K1 (i.e., pin 8 of the magnetic latching relay K1). The drain of the PMOS transistor Q2 is also electrically connected to the gate of the PMOS transistor Q3 and the first terminal of the voltage drop resistor R8 through resistor R11. The drain of the PMOS transistor Q3 is connected to the gate of the NMOS transistor Q5 and the gate of the NMOS transistor Q6. The drain of S-MOSFET Q4 is electrically connected. The second terminal of voltage drop resistor R8, the source of PMOS transistor Q3, voltage drop resistor R10, and the source of PMOS transistor Q2 are electrically connected to the output terminal of the energy storage power supply processing unit to receive the power signal BATTERY_3V3. The gate of NMOS transistor Q4 is electrically connected to the first output terminal of the main control unit through resistors R13 and R15 to receive the drive signal PB1. The gate of NMOS transistor Q5 is electrically connected to the second output terminal of the main control unit through resistors R14 and R16 to receive the drive signal PB2.

[0093] PMOS transistors Q2, Q3, Q4, and Q5 are off by default. When the drive signal PB1 output from the first output terminal of the main control unit is high and the drive signal PB2 output from the second output terminal of the main control unit is low, NMOS transistor Q4 is turned on, current flows through the voltage drop resistor R10, PMOS transistor Q2 is turned on, current flows from pin 8 to pin 1 in the coil of the magnetic latching relay K1, the contacts in the magnetic latching relay K1 are attracted, pins 3 and 2 of the magnetic latching relay K1 are connected and pins 6 and 5 are disconnected, power supply signal L1 and power supply signal HV are not connected, and 3.3V cannot be output to the main control unit through the subsequent step-down unit. When the drive signal PB1 output from the first output terminal of the main control unit is low and the drive signal PB2 output from the second output terminal of the main control unit is high, the NMOS transistor Q5 is turned on, there is current in the voltage drop resistor R8, the PMOS transistor Q3 is turned on, there is current flowing from pin 1 to pin 8 in the coil of the magnetic latching relay K1, the contacts in the magnetic latching relay K1 are repelled, pins 3 and 2 of the magnetic latching relay K1 are disconnected and pins 6 and 5 are connected, the power supply signal L1 and the power supply signal HV are turned on, and 3.3V is output to the main control unit after passing through the step-down unit of the subsequent stage.

[0094] In this embodiment, the magnetic latching relay K1 is a purely physical isolation device, and no leakage current is generated after it is disconnected. In other embodiments, other types of electromagnetic switches may also be used.

[0095] When the magnetic latching relay K1 is used as the core of the switch control, it only needs to provide a short drive current at the moment of disconnection or conduction, and no drive current is required at other times, thereby maximizing the reduction of power consumption.

[0096] In other embodiments, the MOS transistor in the H-bridge drive circuit can be replaced with a bipolar transistor.

[0097] like Figure 6 As shown, in one embodiment, the rectifier unit includes a varistor RV1, a fuse resistor FR1, and a rectifier diode D3.

[0098] exist Figure 6 In the process, the varistor RV1 includes a first terminal that is electrically connected to the first terminal of the fuse resistor FR1 and the live wire L corresponding to the mains power, and a second terminal that is electrically connected to the neutral wire N corresponding to the mains power and grounded.

[0099] exist Figure 6 In the circuit, rectifier diode D3 includes an anode electrically connected to the second terminal of fuse resistor FR1 and a cathode electrically connected to the input terminal of buck unit to output power signal L1.

[0100] Among them, the varistor RV1 is used for surge protection, and the fuse resistor FR1 is used for overcurrent protection.

[0101] like Figure 7 As shown, in one embodiment, the auxiliary power supply unit includes an energy storage unit and an energy storage power supply processing unit.

[0102] exist Figure 7 In this system, the output terminal of the energy storage unit is electrically connected to the input terminal of the energy storage power supply processing unit, and the output terminal of the energy storage power supply processing unit is electrically connected to the power supply terminal of the manual triggering unit and the power supply on / off control unit, respectively, to provide operating voltage to the manual triggering unit and the power supply on / off control unit.

[0103] As mentioned in the above embodiments, the working voltage connected to the mains power on / off control unit and the manual trigger unit can be obtained by processing the mains power through an additional power supply processing unit. However, in this embodiment, in order to ensure reliability and safety, the voltage can be obtained directly by processing the output of the energy storage unit through the energy storage power supply processing unit.

[0104] The energy storage power supply processing unit is also electrically connected to the power supply terminal of the main control unit. After the main control unit is powered on, it can switch from mains power supply to energy storage power supply to reduce mains power consumption and reduce additional billing in the electricity metering scenario.

[0105] like Figure 8 As shown, in one embodiment, the energy storage power supply processing unit includes a bidirectional TVS diode D5 and a reverse protection diode D4.

[0106] exist Figure 8 In the bidirectional TVS diode D5, there is a first terminal that is electrically connected to the anode of the anti-reverse diode D4 and the positive terminal V+ of the energy storage unit, and a second terminal that is connected to the negative terminal V- of the energy storage unit and grounded.

[0107] Among them, the bidirectional TVS diode D5 is used for voltage clamping to maintain the stability of the output power supply voltage. The reverse protection diode D4 prevents current from flowing back into the energy storage unit, thereby protecting the energy storage unit.

[0108] In one embodiment, the energy storage unit includes a battery.

[0109] The battery can be a lithium-ion battery.

[0110] Secondly, in one embodiment, the present invention provides a circuit breaker system, including an actuator for the circuit breaker and a control device for the circuit breaker in any of the above embodiments.

[0111] The actuator of the circuit breaker is electrically connected to the main control unit in the circuit breaker's control unit, and is used to open and close the circuit under the drive of the main control unit.

[0112] By adding a manual triggering unit to the circuit breaker system, when the mains power on / off control unit is in the off state due to collision or vibration, although the main control unit cannot drive the mains power on / off control unit to the on state because it cannot be powered on, the manual triggering unit can serve as a backup solution. It can drive the mains power on / off control unit to the on state when the main control unit is powered off, thereby powering on the main control unit and restoring the entire circuit breaker from the dead state so that it can work normally.

[0113] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the detailed descriptions of other embodiments above, which will not be repeated here.

[0114] The control device and circuit breaker system of the circuit breaker provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

[0115] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A control device for a circuit breaker, characterized in that, The control device of the circuit breaker includes a mains power supply processing unit, a mains power on / off control unit, a main control unit, a manual triggering unit, and an auxiliary power supply unit; The mains power supply processing unit and the mains power on / off control unit are connected in series between the mains power and the power supply terminal of the main control unit. The mains power on / off control unit is used to control the connection and disconnection of the line between the mains power and the power supply terminal of the main control unit under the drive of the main control unit. The auxiliary power supply unit is electrically connected to the power supply terminal of the mains power on / off control unit and the power supply terminal of the manual trigger unit, respectively, and is used to provide operating voltage to the manual trigger unit and the mains power on / off control unit; The manual triggering unit is electrically connected to the mains power on / off control unit and is used to drive the mains power on / off control unit to control the connection and disconnection of the line between the mains power and the power supply terminal of the main control unit when the main control unit is in the power-off state.

2. The control device for the circuit breaker according to claim 1, characterized in that, The manual triggering unit includes a manual switch, a first capacitor, and a bleed resistor; The first input terminal of the manual switch is used to connect to the working voltage. The second input terminal of the manual switch is electrically connected to the first terminal of the first capacitor and the first terminal of the bleeder resistor. The second terminal of the first capacitor is electrically connected to the mains power on / off control unit. The second terminal of the bleeder resistor is grounded. The manual triggering unit is used to drive and control the mains power on / off control unit according to the voltage level of the first capacitor during the charging and discharging phase.

3. The control device for a circuit breaker according to claim 2, characterized in that, The manual switch includes a DIP switch; The first terminal of the DIP switch is used to connect to the working voltage, the second terminal of the DIP switch is electrically connected to the first terminal of the first capacitor, the first terminal of the bleeder resistor and the output terminal of the mains power supply processing unit, and the third terminal of the DIP switch is electrically connected to the main control unit. The DIP switch is used to control the connection of the circuit between its second terminal and the first terminal or between its second terminal and the third terminal. The main control unit is used to determine the on / off state of the DIP switch based on the detection signal received from the third terminal of the DIP switch.

4. The control device for the circuit breaker according to claim 2, characterized in that, The manual switch includes a DIP switch; The first terminal of the DIP switch is electrically connected to the first terminal of the first capacitor and the first terminal of the bleeder resistor, the second terminal of the DIP switch is electrically connected to the output terminal of the mains power supply processing unit and is used to input the working voltage, and the third terminal of the DIP switch is electrically connected to the main control unit. The DIP switch is used to control the connection of the circuit between its second terminal and the first terminal or between its second terminal and the third terminal. The main control unit is used to determine the on / off state of the DIP switch based on the detection signal received from the third terminal of the DIP switch.

5. The control device for the circuit breaker according to claim 3 or 4, characterized in that, The first terminal of the first capacitor and the first terminal of the bleeder resistor are also electrically connected to the main control unit, respectively. The main control unit is used to control the first capacitor to be fully charged when it is powered on.

6. The control device for a circuit breaker according to claim 3 or 4, characterized in that, The manual triggering unit also includes a first anti-reverse diode and a second anti-reverse diode; The DIP switch is connected to the operating voltage through the first anti-reverse diode, and the DIP switch is electrically connected to the output terminal of the mains power supply processing unit through the second anti-reverse diode.

7. The control device for a circuit breaker according to claim 3 or 4, characterized in that, The manual triggering unit further includes a first current-limiting resistor and a second current-limiting resistor; The DIP switch is electrically connected to the output terminal of the mains power supply processing unit through the first current-limiting resistor, and the DIP switch is electrically connected to the main control unit through the second current-limiting resistor.

8. The control device for the circuit breaker according to claim 3 or 4, characterized in that, The manual triggering unit also includes a bidirectional TVS diode, a pull-down resistor, and a second capacitor; The first anode of the bidirectional TVS diode, the first end of the pull-down resistor, and the first end of the second capacitor are respectively electrically connected to the third end of the DIP switch, and the second anode of the bidirectional TVS diode, the second end of the pull-down resistor, and the second end of the second capacitor are respectively grounded.

9. The control device for a circuit breaker according to any one of claims 1 to 4, characterized in that, The auxiliary power supply unit includes an energy storage unit and an energy storage power supply processing unit; The output terminal of the energy storage unit is electrically connected to the input terminal of the energy storage power supply processing unit. The output terminal of the energy storage power supply processing unit is electrically connected to the power supply terminal of the manual triggering unit and the power supply terminal of the mains power on / off control unit, respectively, for providing operating voltage to the manual triggering unit and the mains power on / off control unit.

10. The control device for a circuit breaker according to any one of claims 1 to 4, characterized in that, The mains power on / off control unit includes a magnetic latching relay and an H-bridge drive circuit; The first end of the contact in the magnetic latching relay is electrically connected to the output end of the mains power supply processing unit, the second end of the contact in the magnetic latching relay is electrically connected to the power supply end of the main control unit, the first end of the coil in the magnetic latching relay is electrically connected to the first access end of the H-bridge drive circuit, the second end of the coil in the magnetic latching relay is electrically connected to the second access end of the H-bridge drive circuit, and the third and fourth access ends of the H-bridge drive circuit are respectively electrically connected to the auxiliary power supply unit. The first driving terminal of the H-bridge driving circuit is electrically connected to the first output terminal of the main control unit, and the second driving terminal of the H-bridge driving circuit is electrically connected to the second output terminal of the main control unit and the output terminal of the manual trigger unit, respectively.

11. A circuit breaker system, characterized in that, Includes the actuating device of the circuit breaker and the control device of the circuit breaker as described in any one of claims 1 to 10; The actuator of the circuit breaker is electrically connected to the main control unit in the control device of the circuit breaker, and is used to open and close the circuit under the drive of the main control unit.

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