Switch unit of circuit breaker control device, AC / DC conversion unit and circuit breaker control device

Abstract

The utility model provides a switch unit of a circuit breaker control device, an AC / DC conversion unit and the circuit breaker control device. The switch unit of the circuit breaker control device comprises an electromagnetic switch and an H-bridge drive circuit. A first end of a contact in the electromagnetic switch is used for accessing a power supply signal, and a second end of the contact in the electromagnetic switch is used for outputting the power supply signal; a first end of a coil in the electromagnetic switch is electrically connected with a first output end of the H-bridge driving circuit, and a second end of the coil in the electromagnetic switch is electrically connected with a second output end of the H-bridge driving circuit; the first driving end of the H-bridge driving circuit is used for accessing a first driving signal, the second driving end of the H-bridge driving circuit is used for accessing a second driving signal, and the power supply end of the H-bridge driving circuit is used for accessing a working voltage signal. According to the utility model, the electromagnetic switch and the H-bridge drive circuit are used as switch units, the switching function is realized by using an electromagnetic induction mode, and the driving is physically isolated without causing related interference.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, and in particular to a switch unit, a conversion unit and a circuit breaker control device of a circuit breaker control device. Background Art

[0002] The external circuit breaker of the smart electricity meter is a key component for cooperating with the Internet of Things electricity meter to realize the remote fee control function, and is an important part of promoting the digital transformation of operating electricity information collection and management.

[0003] In the prior art, the switch unit of the circuit breaker control device usually adopts an electronic switch, but this method is difficult to isolate in terms of driving, thus causing related interference. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a switch unit, a conversion unit and a circuit breaker control device of a circuit breaker control device.

[0005] In a first aspect, in one embodiment, the utility model provides a switch unit of a circuit breaker control device, the switch unit of the circuit breaker control device comprising:

[0006] Electromagnetic switch and H-bridge drive circuit;

[0007] The first end of the contact in the electromagnetic switch is used to receive the power signal, and the second end of the contact in the electromagnetic switch is used to output the power signal;

[0008] The first end of the coil in the electromagnetic switch is electrically connected to the first output end of the H-bridge drive circuit, and the second end of the coil in the electromagnetic switch is electrically connected to the second output end of the H-bridge drive circuit;

[0009] The first driving end of the H-bridge driving circuit is used to receive a first driving signal, the second driving end of the H-bridge driving circuit is used to receive a second driving signal, and the power supply end of the H-bridge driving circuit is used to receive an operating voltage signal.

[0010] In one embodiment, the electromagnetic switch comprises a magnetic latching relay.

[0011] In one embodiment, the H-bridge driving circuit includes a first triode, a second triode, a third triode, a fourth triode, a first voltage drop resistor, and a second voltage drop resistor;

[0012] The first end of the coil in the magnetic latching relay is electrically connected to the base of the first triode through the first end of the second voltage drop resistor, the emitter of the first triode is electrically connected to the collector of the fourth triode and the second end of the coil in the magnetic latching relay, the emitter of the first triode is electrically connected to the base of the second triode and the first end of the first voltage drop resistor, the emitter of the second triode is electrically connected to the collector of the third triode, and the second end of the first voltage drop resistor, the collector of the second triode, the second voltage drop resistor and the collector of the first triode are respectively used to access the working voltage signal;

[0013] The base of the third transistor is used to access the first driving signal, and the base of the fourth transistor is used to access the second driving signal.

[0014] In a second aspect, in one embodiment, the utility model provides an AC / DC conversion unit, comprising a switch unit of the circuit breaker control device in any one of the above embodiments.

[0015] In one embodiment, the AC / DC conversion unit further includes a rectification unit and a voltage adjustment unit;

[0016] The input end of the rectifier unit is electrically connected to the power line, the output end of the rectifier unit is electrically connected to the first end of the contact in the electromagnetic switch, the second end of the contact in the electromagnetic switch is electrically connected to the input end of the voltage adjustment unit, and the output end of the voltage adjustment unit is electrically connected to the power supply end of the H-bridge drive circuit.

[0017] In a third aspect, in one embodiment, the utility model provides a circuit breaker control device, comprising the AC / DC conversion unit in one of the above embodiments.

[0018] In one embodiment, the circuit breaker control device further includes a first voltage detection unit, an energy storage power supply unit and a main control unit, the main control unit includes a first output terminal, a second output terminal and a third output terminal, and the first output terminal of the main control unit includes a first H-bridge driving output terminal and a second H-bridge driving output terminal;

[0019] An input end of the first voltage detection unit is electrically connected to the power line, and an output end of the first voltage detection unit is electrically connected to a first feedback end of the main control unit to feed back a first voltage detection signal to the main control unit;

[0020] The output end of the voltage adjustment unit and the output end of the energy storage power supply unit are electrically connected to the power supply end of the main control unit respectively, the first H-bridge driving output end of the main control unit is electrically connected to the first driving end of the H-bridge driving circuit, the second H-bridge driving output end of the main control unit is electrically connected to the second driving end of the H-bridge driving circuit, and the second output end of the main control unit is electrically connected to the control end of the energy storage power supply unit, so as to control the on / off states of the AC / DC conversion unit and the energy storage power supply unit respectively;

[0021] The third output terminal of the main control unit is electrically connected to the driving terminal of the circuit breaker to control the switching state of the circuit breaker.

[0022] In one embodiment, the circuit breaker control device further includes a second voltage detection unit;

[0023] The input end of the second voltage detection unit is electrically connected to the output end of the energy storage power supply unit, and the output end of the second voltage detection unit is electrically connected to the second feedback end of the main control unit to feed back a second voltage detection signal to the main control unit.

[0024] In one embodiment, the energy storage and power supply unit includes an energy storage unit and a power management unit;

[0025] The output end of the energy storage unit is electrically connected to the input end of the power management unit, the output end of the power management unit is electrically connected to the power end of the main control unit, and the control end of the power management unit is electrically connected to the second output end of the main control unit.

[0026] In one embodiment, the power management unit includes a PMOS tube, a third voltage drop resistor and an NMOS tube;

[0027] The source of the PMOS tube is electrically connected to the output end of the energy storage unit and the first end of the third voltage drop resistor, respectively; the gate of the PMOS tube is electrically connected to the second end of the third voltage drop resistor and the drain of the NMOS tube, respectively; the drain of the PMOS tube is electrically connected to the power supply end of the main control unit, the gate of the NMOS tube is electrically connected to the second output end of the main control unit, and the source of the NMOS tube is grounded.

[0028] Through the switch unit, conversion unit and circuit breaker control device of the above-mentioned circuit breaker control device, an electromagnetic switch and an H-bridge drive circuit are used as the switch unit, and the switching function is realized by electromagnetic induction. The drive is physically isolated and will not cause related interference. In addition, the electromagnetic switch usually only requires driving current when it is in action, which can reduce power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 This is a schematic diagram of the structure of a circuit breaker system in one embodiment of the utility model;

[0031] Figure 2 This is a schematic diagram of the specific structure of the second voltage detection unit in one embodiment of the utility model;

[0032] Figure 3 This is a schematic diagram of the specific structure of the second voltage detection unit in another embodiment of the utility model;

[0033] Figure 4 This is a schematic diagram of the specific structure of an AC / DC conversion unit in one embodiment of the utility model;

[0034] Figure 5 This is a schematic diagram of the specific structure of a power control unit and a control drive unit in one embodiment of the utility model;

[0035] Figure 6 This is a schematic diagram of the specific structure of a first voltage adjustment circuit and an isolation circuit in one embodiment of the utility model;

[0036] Figure 7 This is a schematic diagram of the specific structure of an energy storage power supply unit in one embodiment of the utility model;

[0037] Figure 8 This is a schematic diagram of the specific structure of a power management unit in one embodiment of the utility model;

[0038] Fig. 9 This is a schematic diagram of the specific structure of an energy storage unit in one embodiment of the utility model;

[0039] Fig.10 This is a schematic diagram of the specific structure of the first voltage detection unit in one embodiment of the utility model;

[0040] Fig.11 This is a schematic diagram of a structure including a third voltage detection unit in one embodiment of the utility model;

[0041] Fig.12 The figure is a schematic diagram of the specific structure of the third voltage detection unit in one embodiment of the utility model. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0043] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In the present application, the word "exemplary" is used to mean "used as an example, illustration or description". Any embodiment described as "exemplary" in the present application is not necessarily interpreted as being more preferred or more advantageous than other embodiments. In order to enable any person skilled in the art to implement and use the utility model, the following description is given. In the following description, details are listed for the purpose of explanation. It should be understood that one of ordinary skill in the art can recognize that the utility model can be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid unnecessary details that make the description of the utility model obscure. Therefore, the utility model is not intended to be limited to the embodiments shown, but is consistent with the widest range of principles and features disclosed in this application.

[0044] First, as Figure 1 As shown, in one embodiment, the utility model provides a circuit breaker control device, which includes a first voltage detection unit, an AC / DC conversion unit, an energy storage power supply unit and a main control unit.

[0045] The input end of the AC / DC conversion unit and the input end of the first voltage detection unit are electrically connected to the power line respectively, and the output end of the first voltage detection unit is electrically connected to the first feedback end of the main control unit to feed back a first voltage detection signal to the main control unit; the output end of the AC / DC conversion unit and the output end of the energy storage power supply unit are electrically connected to the power supply end of the main control unit respectively, the first output end of the main control unit is electrically connected to the control end of the AC / DC conversion unit, and the second output end of the main control unit is electrically connected to the control end of the energy storage power supply unit to control the on / off states of the AC / DC conversion unit and the energy storage power supply unit respectively.

[0046] Among them, the AC / DC conversion unit converts the AC power transmitted by the power line to obtain the corresponding DC power. Similarly, the energy storage power supply unit can also output the corresponding DC power. Therefore, the DC power output by the AC / DC conversion unit and the DC power output by the energy storage power supply unit are output in parallel to the main control unit to realize the power supply to the main control unit, and the main control unit can realize two power supply options by controlling the on and off of the AC / DC conversion unit and the energy storage power supply unit respectively. Specifically, if the AC / DC conversion unit is turned on and the energy storage power supply unit is turned off, the AC / DC conversion unit will supply power; if the AC / DC conversion unit is turned off and the energy storage power supply unit is turned on, the energy storage power supply unit will supply power.

[0047] The main control unit is used to disconnect the AC / DC conversion unit and turn on the energy storage power supply unit when the first voltage detection signal indicates that the power line is powered on.

[0048] Among them, the main control unit can obtain the voltage condition of the input end of the AC / DC conversion unit through the first voltage detection unit, thereby obtaining the corresponding first voltage detection signal. When the power line does not input the corresponding alternating current, the circuit breaker system does not need to work, so there is no need to be powered by the energy storage power supply unit, thereby avoiding waste of electricity in the energy storage power supply unit; when the power line inputs the corresponding alternating current, the circuit breaker system needs to work normally. In order to avoid additional billing, the energy storage power supply unit is controlled to be turned on and the AC / DC conversion unit is disconnected so that the energy storage power supply unit can be used for power supply.

[0049] The third output terminal of the main control unit is electrically connected to the driving terminal of the circuit breaker to control the switching state of the circuit breaker.

[0050] Among them, the main control unit controls the switch status of the AC / DC conversion unit and the energy storage power supply unit in the power supply channel selection, and is mainly used to control the switch status of the circuit breaker. Since the circuit breaker is connected in series with the power line, when the switch status of the circuit breaker is disconnected, the AC power on the power line cannot be transmitted to the subsequent power load. When the switch status of the circuit breaker is on, the AC power on the power line can be transmitted to the subsequent power equipment.

[0051] Among them, Figure 1 As shown, the circuit breaker may further include a circuit breaker body and a motor actuator unit, and the main control unit controls the opening and closing of the circuit breaker body through the motor actuator unit; if the main control unit can operate at a higher voltage and can send a higher voltage driving signal to the motor actuator unit, the motor actuator unit can be directly driven by the main control unit without providing additional working voltage to the motor actuator unit.

[0052] Among them, in the selection of power supply channels, the energy storage power supply unit can be used as the normal power supply, and the AC / DC conversion unit can be used as the backup power supply, so as to minimize the power drawn from the power line to reduce additional billing. Specifically, since the energy storage unit outputs power with stored electric energy, the amount of energy it can provide is limited, and when the circuit breaker body needs to be opened and closed (that is, when the drive motor execution unit is in action), a higher energy is required. In order to ensure the reliability of the opening and closing of the circuit breaker body, the AC / DC conversion unit can be used for power supply, and in other cases, the energy storage unit is used for power supply.

[0053] The main control unit may be a Bluetooth SOC, which is an integrated circuit chip that integrates all necessary computer and wireless communication functions on a single silicon chip. These functions include a processor, memory, input / output (I / O) interface, and a Bluetooth wireless communication module. The parameters of the Bluetooth SOC are shown in Table 1:

[0054] Table 1

[0055]

[0056]

[0057] Among them, Figure 1 As shown, the circuit breaker control device also includes a position detection unit connected to the main control unit. The position detection unit is used to obtain the key position information of the circuit breaker and send the key position information to the main control unit; the key position information is used to indicate the state of the circuit breaker and the mode of the circuit breaker, wherein the state of the circuit breaker includes the micro-motion state of the closing position, the micro-motion state of the initial position, the micro-motion state of the tripping position, and the micro-motion state of the handle, and the mode of the circuit breaker includes the automatic closing mode and the manual closing mode.

[0058] Among them, Figure 1 As shown, in the scenario where the electric energy meter has an external circuit breaker, the circuit breaker control device also includes a networking identification unit; the networking identification unit is used to draw power from the power line and automatically network with the electric energy meter, thereby completing data interaction between the circuit breaker control device and the electric energy meter.

[0059] Through the above-mentioned circuit breaker control device, two power supply modes, an AC / DC conversion unit and an energy storage power supply unit, are set, and the main control unit is used to control the on and off of the two respectively, so that one of the two power supply modes can be flexibly selected to power the device, thereby avoiding the problem of more additional billing caused by always taking power from the power line in the prior art, which greatly alleviates the user's concerns about additional billing; in addition, the first voltage detection unit is used to perform voltage detection on the input end of the AC / DC conversion unit, and when the first voltage detection signal indicates that the power line is powered on, the AC / DC conversion unit is disconnected and the energy storage power supply unit is turned on, so as to ensure that the power line is switched to the energy storage power supply unit for power supply in time after power is powered on, which not only reduces additional billing, but also avoids power supply waste caused by continuous power consumption of the energy storage power supply unit before power-on.

[0060] In one embodiment, the main control unit is further configured to turn on the AC / DC conversion unit and disconnect the energy storage power supply unit when the first voltage detection signal indicates that the power line is powered off.

[0061] Among them, the above embodiments have mentioned that when the power line does not input the corresponding AC power, the circuit breaker system does not need to work, so there is no need for the energy storage power supply unit to supply power, thereby avoiding the waste of power in the energy storage power supply unit. Therefore, in this embodiment, when the detected first voltage detection signal indicates that the power line is powered off, the AC / DC conversion unit is turned on and the energy storage power supply unit is disconnected, thereby stopping the power consumption of the energy storage power supply unit, and also ensuring that the main control unit can be started based on the power supply of the AC / DC conversion unit when it is powered on next time.

[0062] like Figure 1 As shown, in one embodiment, the circuit breaker control device further includes a second voltage detection unit.

[0063] The input end of the second voltage detection unit is electrically connected to the output end of the energy storage power supply unit, and the output end of the second voltage detection unit is electrically connected to the second feedback end of the main control unit to feed back a second voltage detection signal to the main control unit.

[0064] The main control unit is also used to turn on the AC / DC conversion unit and disconnect the energy storage power supply unit when the second voltage detection signal indicates that the energy storage power supply unit is abnormal.

[0065] In the above embodiment, it has been mentioned that the voltage condition of the input end of the AC / DC conversion unit can be obtained through the first voltage detection unit, so as to select the corresponding power supply mode according to the voltage condition. In this embodiment, the voltage condition of the energy storage power supply unit can also be obtained through the second voltage detection unit.

[0066] Among them, when the circuit breaker control device needs to be powered, under normal circumstances, it is powered by the energy storage power supply unit. However, in actual situations, various abnormal conditions may occur in the energy storage power supply unit, causing its output voltage to be overvoltage or undervoltage, thereby failing to meet the power supply demand. Therefore, in this embodiment, the output voltage of the energy storage power supply unit is detected by the second voltage detection unit. When the detected second voltage detection signal is overvoltage or undervoltage, it indicates that the energy storage power supply unit is abnormal and can no longer meet the power supply demand, thereby turning on the AC / DC conversion unit and disconnecting the energy storage power supply unit, so that the AC / DC conversion unit is powered to ensure the normal operation of the device, and the low power of the energy storage unit is reported through the networking identification unit.

[0067] It should be noted that abnormalities in the energy storage power supply unit occur only in a few cases and do not affect its use as the main power supply method.

[0068] like Figure 2 As shown, in one embodiment, the second voltage detection unit includes a comparator U2A.

[0069] The first input terminal (such as the inverting input terminal) of the comparator U2A is electrically connected to the output terminal of the energy storage power supply unit to receive the BATTERY_3V3 signal, the second input terminal (such as the in-phase input terminal) of the comparator U2A is connected to the reference voltage (such as the +3V3 reference voltage), and the output terminal of the comparator U2A is electrically connected to the second feedback terminal of the main control unit to output the ADC_BATTERY signal.

[0070] Among them, when the BATTERY_3V3 signal is undervoltage, the voltage obtained by the voltage division of resistors R15 and R22 is less than the voltage obtained by the voltage division of +3V3 through resistors R28, R29 and R30, and the comparator U2A outputs a high-level ADC_BATTERY signal through resistor R26; conversely, when the BATTERY_3V3 signal is overvoltage, the voltage obtained by the voltage division of resistors R15 and R22 is greater than the voltage obtained by the voltage division of +3V3 through resistors R28, R29 and R30, and the comparator U2A outputs a low-level ADC_BATTERY signal through resistor R26. In this way, the main control unit can determine whether the energy storage power supply unit is undervoltage or overvoltage according to the level of the connected ADC_BATTERY signal.

[0071] like Figure 3 As shown, in one embodiment, the second voltage detection unit includes a reset chip U13.

[0072] The input terminal IN of the reset chip U13 is electrically connected to the output terminal of the energy storage power supply unit to receive the BATTERY_3V3 signal, and the output terminal RESET / OUT of the reset chip U13 is electrically connected to the second feedback terminal of the main control unit to output the ADC_BATTERY signal.

[0073] The reset chip U13 is used to output a reset signal when the input voltage exceeds its reset threshold.

[0074] When the second voltage detection unit adopts the reset chip U13, the main control unit can also determine whether the power supply unit is under-voltage or over-voltage according to the level of the connected ADC_BATTERY signal.

[0075] like Figure 4 As shown, in one embodiment, the AC / DC conversion unit includes a rectifying unit, a power control unit, a control driving unit and a voltage adjusting unit, and the voltage adjusting unit includes a first voltage adjusting unit and a second voltage adjusting unit.

[0076] The input end of the rectifier unit is electrically connected to the power line, the output end of the rectifier unit is electrically connected to the input end of the power control unit, the output end of the power control unit is electrically connected to the input end of the first voltage adjustment unit, the output end of the first voltage adjustment unit is electrically connected to the input end of the second voltage adjustment unit and the power end of the motor execution unit, respectively, the output end of the second voltage adjustment unit is electrically connected to the power end of the main control unit and the power end of the control drive unit, the control end of the control drive unit is electrically connected to the first output end of the main control unit, and the output end of the control drive unit is electrically connected to the control end of the power control unit.

[0077] The main control unit is also used to control the switch state of the power control unit by controlling the driving unit.

[0078] Among them, the rectifier unit is used to convert the AC power in the power line to obtain an initial DC power supply, and the voltage adjustment unit is used to adjust the voltage (usually step down) of the initial DC power supply output by the rectifier unit to obtain the target DC power supply to power the main control unit.

[0079] Among them, the above embodiments have mentioned that if the main control unit can operate at a higher voltage and can output a driving signal with a higher voltage, the motor execution unit can be driven directly by the main control unit, thereby eliminating the need to provide an additional working voltage to the motor execution unit; however, under normal circumstances, the main control unit operates at a lower voltage and can only output a driving signal with a lower voltage, such as 3.3V; and the drive of the motor execution unit requires a higher working voltage, such as 15V.

[0080] In this scenario, the main control unit cannot independently drive the motor execution unit. In this embodiment, in view of this situation, the voltage adjustment unit includes a first voltage adjustment unit and a second voltage adjustment unit, so that the initial DC power output by the rectifier unit is adjusted twice in voltage, that is, the voltage is reduced twice, and the amplitude of the first target DC power output by the first voltage adjustment unit meets the working voltage requirement of the motor execution unit, and the amplitude of the second target DC power output by the second voltage adjustment unit meets the working voltage requirement of the main control unit.

[0081] When the second voltage detection unit is in the form of a comparator, the output voltage of the second voltage adjustment unit can be used as a reference voltage of the comparator, that is, the output end of the second voltage adjustment unit can also be electrically connected to the second input end of the comparator.

[0082] like Figure 4 As shown, in one embodiment, the AC / DC conversion unit further includes a surge protection unit and an isolation unit.

[0083] The surge protection unit is connected in series between the power line and the rectifying unit, and the isolation unit is connected in series between the first voltage regulating unit and the second voltage regulating unit.

[0084] Among them, the surge protection unit is used to limit the surge signal on the power line to prevent it from being transmitted to the subsequent stage to damage the subsequent stage devices.

[0085] Among them, since the power line is in a strong power environment, and the main control unit is in a weak power environment, when the main control unit is electrically connected to the power line through a series of lines, it is easy to be disturbed by the strong power environment, causing damage to the main control unit. Therefore, in this embodiment, in view of this situation, an isolation unit is added, and the isolation unit can achieve electrical isolation between the strong power environment and the weak power environment, thereby preventing the main control unit from being damaged due to interference from the strong power environment.

[0086] like Figure 5 As shown, in one embodiment, the power control unit includes a magnetic holding relay K1, the control drive unit includes an H-bridge drive circuit, the H-bridge drive circuit includes transistors Q1, Q2, Q3, Q4, a voltage drop resistor R5, and a voltage drop resistor R6, and the first output end of the main control unit includes a first H-bridge drive output end and a second H-bridge drive output end.

[0087] The first end of the contact in the magnetic latching relay K1 is electrically connected to the power line, the second end of the contact in the magnetic latching relay K1 is electrically connected to the input end of the voltage adjustment unit, the first end of the coil in the magnetic latching relay K1 is electrically connected to the first end of the voltage drop resistor R6 and the base of the transistor Q1 through the resistor R9, the emitter of the transistor Q1 is electrically connected to the collector of the transistor Q4 and the second end of the coil in the magnetic latching relay K1, the emitter of the transistor Q1 is also electrically connected to the base of the transistor Q2 and the first end of the voltage drop resistor R5 through the resistor R8, and the transistors are electrically connected to the collector of the transistor Q4 and the second end of the coil in the magnetic latching relay K1. The emitter of transistor Q2 is electrically connected to the collector of transistor Q3, the second end of voltage drop resistor R5, the collector of transistor Q2, voltage drop resistor R6 and the collector of transistor Q1 are electrically connected to the output end of the voltage adjustment circuit and the output end of the energy storage power supply unit respectively to access the BAT_J signal, the base of transistor Q3 is electrically connected to the first H-bridge driving output end of the main control unit through resistor R12 to access the PB1 signal, and the base of transistor Q4 is electrically connected to the second H-bridge driving output end of the main control unit through resistor R14 to access the PB2 signal.

[0088] The main control unit controls the H-bridge drive circuit by sending PB1 and PB2 signals, thereby controlling the current direction on the coil in the magnetic latching relay K1, and further opening and closing the contacts in the magnetic latching relay K1.

[0089] The magnetic latching relay K1 is a purely physical isolation device and does not generate leakage current after being disconnected. In other embodiments, the power control unit may also use other types of electromagnetic switches.

[0090] Among them, when the magnetic latching relay K1 is used as the core of the switch control, it only needs to provide a short-time driving current at the moment of disconnection or conduction, and no driving current is required at other times, thereby maximizing the reduction of power consumption. When other ordinary normally open relays are used, they also only need to provide driving current during the conduction process, and no consumption is required during the disconnection process. Overall, power consumption can also be reduced to a certain extent.

[0091] In other embodiments, the transistors in the H-bridge driving circuit may also be replaced by MOS transistors.

[0092] like Figure 5 As shown, in one embodiment, the surge protection unit includes a varistor RV1. When a surge signal exists, the voltage across the varistor RV1 increases rapidly, while the resistance of the varistor RV1 decreases rapidly, thereby short-circuiting the subsequent circuit and directing the surge signal to the ground.

[0093] like Figure 5As shown, in one embodiment, the rectifying unit includes a diode D1, and the unidirectional conduction characteristic of the diode is used to realize half-wave rectification, and only the positive half-wave signal can be output to the subsequent stage. In other embodiments, the rectifying circuit can also be a bridge rectifier.

[0094] In one embodiment, the AC / DC conversion unit further includes a filtering unit, which is used to smooth the initial DC power output by the rectifying unit to make the amplitude change of the DC power smoother. Figure 5 As shown, the filtering unit includes an electrolytic capacitor CE2, and the electrolytic capacitor CE2 can smooth waves by charging and discharging.

[0095] like Figure 6 As shown, the first voltage adjustment unit includes a switching power chip U4, the isolation unit includes a transformer U3, and the control terminal ZC of the switching power chip U4 is electrically connected to the fourth output terminal of the main control unit to access the ACDC_ZC signal. The DC power output by the rectifier unit is introduced to the ground after passing through the primary winding of the transformer U3 (the winding corresponding to pins 1 and 2) and the built-in switch tube in the switching power chip U4. The switching power chip U4 controls the breaking frequency of the built-in switch tube by PWM control, thereby adjusting the voltage amplitude output by the primary winding of the transformer U3. The first secondary winding of the transformer U3 (the winding corresponding to pins 6 and 10) uses the principle of electromagnetic induction to output the corresponding DC power supply (such as a +15V DC power supply), and the second secondary winding (the winding corresponding to pins 4 and 5) also uses the principle of electromagnetic induction to output the corresponding working voltage to the switching power chip U4 to realize the power supply of the switching power chip U4.

[0096] When the first voltage adjustment unit outputs a +15V DC power supply and the power supply requirement of the main control unit is a +3.3V DC power supply, the second voltage adjustment unit needs to reduce the voltage of the +15V DC power supply to a +3.3V DC power supply.

[0097] exist Figure 6 middle:

[0098] A diode D3 and a resistor R2 are also included for freewheeling.

[0099] Resistor R3 and capacitor C2 are also included for filtering.

[0100] It also includes a diode D2, a capacitor C1 and a resistor R1 for output rectification and filtering.

[0101] An electrolytic capacitor CE1 is also included for energy storage.

[0102] A diode D4 and a resistor R4 are also included for power supply rectification and current limiting.

[0103] It also includes capacitors C3 and C4 for power supply, energy storage and filtering.

[0104] Resistors R7 and R13 are also included for power supply feedback sampling.

[0105] Among them, the specific working principles and details of the above devices can be referred to the existing technology and will not be repeated here.

[0106] like Figure 7 As shown, in one embodiment, the energy storage and power supply unit includes an energy storage unit and a power management unit.

[0107] The output end of the energy storage unit is electrically connected to the input end of the power management unit, the output end of the power management unit is electrically connected to the power end of the main control unit, and the control end of the power management unit is electrically connected to the second output end of the main control unit.

[0108] The energy storage unit may be a battery, a supercapacitor, etc. In other embodiments, the energy storage unit may also be a combination of a battery and a capacitor, wherein the battery is used to charge the capacitor, and the capacitor is used to discharge after charging. Discharging through the capacitor can quickly output energy to meet the power demand of the subsequent stage.

[0109] like Figure 8 As shown, in one embodiment, the power management unit includes a PMOS tube Q5, a voltage drop resistor R31 and an NMOS tube Q6.

[0110] The source of the PMOS tube Q5 is electrically connected to the output end of the energy storage unit and the first end of the voltage drop resistor R31 respectively to access the BATTERY_3V3 signal, the gate of the PMOS tube Q5 is electrically connected to the second end of the voltage drop resistor R31 and the drain of the NMOS tube Q6 respectively, the drain of the PMOS tube Q5 is electrically connected to the power supply end of the main control unit to output the working voltage (such as +3V3 working voltage), the gate of the NMOS tube Q6 is electrically connected to the second output end of the main control unit to access the BATTERY_3V3_CTL signal, and the source of the NMOS tube Q6 is grounded.

[0111] Among them, when the BATTERY_3V3_CTL signal output by the main control unit is at a high level, the NMOS tube Q6 is turned on, a voltage drop is generated on the voltage drop resistor R31, the PMOS tube Q5 is turned on, and the connected BATTERY_3V3 signal passes through the PMOS tube Q5 and outputs a +3V3 working voltage to the power supply end of the main control unit; conversely, when the BATTERY_3V3_CTL signal output by the main control unit is at a low level, the NMOS tube Q6 is turned off, no voltage drop is generated on the voltage drop resistor R31, the PMOS tube Q5 is turned off, the connected BATTERY_3V3 signal cannot pass through the PMOS tube Q5, and ultimately cannot output a +3V3 working voltage to the power supply end of the main control unit.

[0112] like Fig. 9 As shown, in one embodiment, the energy storage unit includes a 3.6V battery, the positive electrode of the battery is electrically connected to the power supply terminal of the control drive unit through a diode D5 to output a BAT_J signal, and the positive electrode of the battery is also electrically connected to the input terminal of the power management unit through a diode D6 to output a BATTERY_3V3 signal.

[0113] like Fig.10 As shown, in one embodiment, the first voltage detection unit includes a comparator U1A.

[0114] The inverting input terminal of the comparator U1A is electrically connected to the power line through a voltage divider unit composed of resistors R18, R19, R20 and R27 to access the UA signal. The non-inverting input terminal of the comparator U1A is connected to the reference voltage of +3V3 through a voltage divider unit composed of resistors R24 and R29. The output terminal of the comparator U1A is electrically connected to the first feedback terminal of the main control unit through a resistor R23 to output the FA signal.

[0115] Among them, when the power line is normally connected to AC power, the voltage at the inverting input terminal of the comparator U1A is greater than the voltage at its non-inverting input terminal, and the comparator U1A outputs a low-level FA signal; conversely, when the power line is not connected to AC power, the voltage at the inverting input terminal of the comparator U1A is less than the voltage at its non-inverting input terminal, and the comparator U1A outputs a high-level FA signal. Thus, the main control unit can determine whether the power line is connected to AC power according to the level of the connected FA signal.

[0116] like Fig.11 As shown, in one embodiment, the circuit breaker control device further includes a third voltage detection unit.

[0117] An input end of the third voltage detection unit is electrically connected to an output end of the first voltage adjustment unit, and an output end of the third voltage detection unit is electrically connected to a third feedback end of the main control unit.

[0118] Among them, the above embodiments have mentioned that the motor execution unit requires a voltage with a higher amplitude to be driven, and the voltage output by the first voltage adjustment unit is used to power the motor execution unit. Therefore, its voltage needs to be detected to ensure reliable driving of the motor execution unit.

[0119] like Fig.12 As shown, in one embodiment, the third voltage detection unit includes a voltage dividing unit composed of a resistor R32 and a resistor R33, the first end of the resistor R32 is connected to the working voltage of +15V, the second end of the resistor R32 is electrically connected to the third feedback end of the main control unit and the first end of the resistor R33 respectively to output a POWER_15V signal, and the second end of the resistor R33 is grounded.

[0120] The voltage value connected to the first end of the resistor R32 is +15V in an ideal situation, but it does not mean that it is always +15V. Fig.12 The +15V is used in the description only to indicate the voltage value under ideal conditions.

[0121] Among them, after the power control unit is turned on, when the first voltage adjustment unit is in working mode, the third voltage detection unit outputs a high-level POWER_15V signal, and when the first voltage adjustment unit processes the sleep mode or abnormal mode, the third voltage detection unit outputs a low-level POWER_15V signal.

[0122] Among them, the first voltage adjustment unit converts strong electricity into weak electricity to supply the second voltage adjustment unit. The opening and closing of this unit are controlled by the main control unit, with a low level opening (working mode) and a high level closing (sleep mode). In order to improve the electrical life of the magnetic holding relay in the power control unit, when the main control unit receives the opening and closing signal, the main control unit first starts the control drive unit to turn on the power control unit. At this time, the no-load current is purely mechanical life, and then the first voltage adjustment unit is controlled to be in working mode.

[0123] The main control unit may access the POWER_15V signal through its own ADC acquisition unit to determine its amplitude, and then determine whether the voltage output by the first voltage adjustment unit meets the driving requirements of the motor execution unit according to the amplitude.

[0124] Second, as Figure 1 As shown, in one embodiment, the utility model provides a circuit breaker system, which includes a circuit breaker and a circuit breaker control device in any one of the above embodiments.

[0125] Through the above-mentioned circuit breaker system, two power supply modes, an AC / DC conversion unit and an energy storage power supply unit, are set, and the main control unit is used to control the on and off of the two respectively, so that one of the two power supply modes can be flexibly selected to power the device, thereby avoiding the problem of more additional billing caused by always taking electricity from the power line in the prior art, which greatly alleviates the user's concerns about additional billing; in addition, the first voltage detection unit is used to perform voltage detection on the input end of the AC / DC conversion unit, and when the first voltage detection signal indicates that the power line is powered on, the AC / DC conversion unit is disconnected and the energy storage power supply unit is turned on, so as to ensure that the power line is switched to the energy storage power supply unit for power supply in time after power is powered on, which not only reduces additional billing, but also avoids power supply waste caused by continuous power consumption of the energy storage power supply unit before power-on.

[0126] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the detailed description of other embodiments above, and will not be repeated here.

[0127] The switch unit, conversion unit and circuit breaker control device of a circuit breaker control device provided by the utility model are introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. At the same time, for technicians in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

[0128] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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 switch unit of a circuit breaker control device, characterized in that: The switch unit of the circuit breaker control device comprises: Electromagnetic switch and H-bridge drive circuit; The first end of the contact in the electromagnetic switch is used to receive a power signal, and the second end of the contact in the electromagnetic switch is used to output a power signal; The first end of the coil in the electromagnetic switch is electrically connected to the first output end of the H-bridge drive circuit, and the second end of the coil in the electromagnetic switch is electrically connected to the second output end of the H-bridge drive circuit; The first driving end of the H-bridge driving circuit is used to receive a first driving signal, the second driving end of the H-bridge driving circuit is used to receive a second driving signal, and the power supply end of the H-bridge driving circuit is used to receive an operating voltage signal.

2. The switch unit of the circuit breaker control device according to claim 1, characterized in that: The electromagnetic switch includes a magnetic latching relay.

3. The switch unit of the circuit breaker control device according to claim 2, characterized in that: The H-bridge driving circuit includes a first triode, a second triode, a third triode, a fourth triode, a first voltage drop resistor, and a second voltage drop resistor; The first end of the coil in the magnetic latching relay is electrically connected to the base of the first triode through the first end of the second voltage drop resistor, the emitter of the first triode is electrically connected to the collector of the fourth triode and the second end of the coil in the magnetic latching relay, the emitter of the first triode is electrically connected to the base of the second triode and the first end of the first voltage drop resistor, the emitter of the second triode is electrically connected to the collector of the third triode, and the second end of the first voltage drop resistor, the collector of the second triode, the second voltage drop resistor and the collector of the first triode are respectively used to access the working voltage signal; The base of the third transistor is used to access the first driving signal, and the base of the fourth transistor is used to access the second driving signal.

4. An AC / DC conversion unit, characterized in that: A switch unit comprising the circuit breaker control device according to any one of claims 1 to 3.

5. The AC / DC conversion unit according to claim 4, characterized in that: The AC / DC conversion unit also includes a rectification unit and a voltage adjustment unit; The input end of the rectifier unit is electrically connected to the power line, the output end of the rectifier unit is electrically connected to the first end of the contact in the electromagnetic switch, the second end of the contact in the electromagnetic switch is electrically connected to the input end of the voltage adjustment unit, and the output end of the voltage adjustment unit is electrically connected to the power supply end of the H-bridge drive circuit.

6. A circuit breaker control device, characterized in that: Includes the AC / DC conversion unit as claimed in claim 5.

7. The circuit breaker control device according to claim 6, characterized in that: The circuit breaker control device further includes a first voltage detection unit, an energy storage power supply unit and a main control unit, wherein the main control unit includes a first output terminal, a second output terminal and a third output terminal, and the first output terminal of the main control unit includes a first H-bridge driving output terminal and a second H-bridge driving output terminal; The input end of the first voltage detection unit is electrically connected to the power line, and the output end of the first voltage detection unit is electrically connected to the first feedback end of the main control unit to feed back a first voltage detection signal to the main control unit; The output end of the voltage adjustment unit and the output end of the energy storage power supply unit are electrically connected to the power supply end of the main control unit respectively, the first H-bridge driving output end of the main control unit is electrically connected to the first driving end of the H-bridge driving circuit, the second H-bridge driving output end of the main control unit is electrically connected to the second driving end of the H-bridge driving circuit, and the second output end of the main control unit is electrically connected to the control end of the energy storage power supply unit, so as to control the on / off states of the AC / DC conversion unit and the energy storage power supply unit respectively; The third output terminal of the main control unit is electrically connected to the driving terminal of the circuit breaker to control the switching state of the circuit breaker.

8. The circuit breaker control device according to claim 7, characterized in that: The circuit breaker control device further includes a second voltage detection unit; The input end of the second voltage detection unit is electrically connected to the output end of the energy storage power supply unit, and the output end of the second voltage detection unit is electrically connected to the second feedback end of the main control unit to feed back a second voltage detection signal to the main control unit.

9. The circuit breaker control device according to claim 7, characterized in that: The energy storage and power supply unit includes an energy storage unit and a power management unit; The output end of the energy storage unit is electrically connected to the input end of the power management unit, the output end of the power management unit is electrically connected to the power end of the main control unit, and the control end of the power management unit is electrically connected to the second output end of the main control unit.

10. The circuit breaker control device according to claim 9, characterized in that: The power management unit includes a PMOS tube, a third voltage drop resistor and an NMOS tube; The source of the PMOS tube is electrically connected to the output end of the energy storage unit and the first end of the third voltage drop resistor, respectively; the gate of the PMOS tube is electrically connected to the second end of the third voltage drop resistor and the drain of the NMOS tube, respectively; the drain of the PMOS tube is electrically connected to the power supply end of the main control unit, the gate of the NMOS tube is electrically connected to the second output end of the main control unit, and the source of the NMOS tube is grounded.

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