Intelligent molded case switch controller with Bluetooth communication function

Abstract

The invention discloses an intelligent molded case switch controller with a Bluetooth communication function. The intelligent molded case switch controller comprises a current transformer sampling unit, a power supply unit, a single-chip microcomputer data processing unit, a tripping action execution unit, a liquid crystal display unit and a Bluetooth communication unit. The single chip microcomputer data processing unit is respectively connected with the current transformer sampling unit, the liquid crystal display unit, the Bluetooth communication unit and the tripping action execution unit; the power supply unit is connected with all the units. The device has the functions of main loop current measurement, main loop current breaking, overcurrent protection and overheat protection, current monitoring and control of a main loop are more flexible and convenient, and the intelligent monitoring, display and automation level is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of controllers, and particularly to an intelligent molded case switch controller with Bluetooth communication function. Background Art

[0002] Currently, molded case circuit breakers only measure the current of the main circuit, perform arithmetic processing through a microprocessor, and perform corresponding tripping actions according to the set value of current protection to achieve the protection function of electrical equipment. However, because all parameters are operated through panel buttons, the operation is cumbersome and error-prone, and as the switch controller develops towards miniaturization and intelligence, it is difficult to layout buttons on the panel; and currently, most controllers use LED indicators or digital tubes for fault indication, and cannot intuitively display status and parameters such as fault current and tripping time.

[0003] Therefore, it is necessary to provide an intelligent molded case switch controller with Bluetooth communication function to solve the above technical problems. Summary of the Invention

[0004] The object of the present invention is to provide an intelligent molded case switch controller with Bluetooth communication function, which is more flexible and convenient for monitoring and controlling the current of the main circuit, and improves the intelligent monitoring, display and automation level.

[0005] The present invention adopts the following technical solutions: an intelligent molded case switch controller with Bluetooth communication function, including the following steps:

[0006] Current transformer sampling unit, power supply unit, single-chip microcomputer data processing unit, tripping action execution unit, liquid crystal display unit and Bluetooth communication unit.

[0007] The single-chip microcomputer data processing unit is respectively connected to the current transformer sampling unit, the liquid crystal display unit, the Bluetooth communication unit and the tripping action execution unit; the power supply unit is connected to all units.

[0008] Among them, the current transformer sampling unit includes a current transformer, a signal amplification and conditioning circuit and an ADC analog signal digital converter; the single-chip microcomputer data processing unit includes an MCU data processor, a data memory and a first peripheral circuit; the tripping action execution unit includes a D / A signal processing circuit and a magnetic flux tripping device; the liquid crystal display unit includes a liquid crystal display screen and a second peripheral circuit; the Bluetooth communication unit includes a Bluetooth communication module and a third peripheral circuit; the power supply unit includes a full-wave rectifier bridge, an AC / DC conversion chip, a diode, a resistor, a capacitor, an inductor and a low-dropout linear voltage regulator, and the power supply unit is used for power supply.

[0009] Further, in the liquid crystal display unit, the second peripheral circuit includes a first resistor R1, a second resistor R2, and a first triode Q1. The PWER_CTL of the MCU data processor is connected to one end of the second resistor R2. The other end of the second resistor R2 is respectively connected to one end of the first resistor R1 and the base of the first triode Q1. The other end of the first resistor R1 is respectively connected to the emitter of the first triode Q1 and the 3.3V power supply. The collector of the first triode Q1 is connected to the liquid crystal display screen.

[0010] The CS, RESET, SCK, and MOSI of the MCU data processor are directly connected to the liquid crystal display screen.

[0011] Further, in the power supply unit, the positive electrodes of the first diode D3, the second diode D5, and the third diode D6 are all connected to the busbar of the intelligent plastic shell switch circuit breaker. The negative electrodes of the first diode D3, the second diode D5, and the third diode D6 are connected together and are respectively connected to one end of the third resistor R9 and one end of the first capacitor C11. The other end of the third resistor R9 is connected to one end of the first inductor L2. The other end of the first inductor L2 is respectively connected to one end of the electrolytic capacitor C9 and the SW terminal of the ACDC control bridge U2. The FB terminal of the ACDC control bridge U2 is respectively connected to one end of the fourth capacitor C4, one end of the fourth resistor R5, and one end of the fifth resistor R7. The VDD terminal of the ACDC control bridge U2 is connected to one end of the third capacitor C3. The GND terminal of the ACDC control bridge U2 is respectively connected to the other end of the third capacitor C3, the negative electrode of the fourth diode D7, and one end of the second inductor L1. The other end of the fourth resistor R5 is respectively connected to one end of the fifth capacitor C1 and the negative electrode of the fifth diode D4. The positive electrode of the fifth diode D4 is respectively connected to one end of the sixth capacitor C7, the other end of the second inductor L1, and one end of the bidirectional voltage stabilizing diode D8, and outputs a 12V power supply. One end of the second inductor L1 is respectively connected to the other end of the fifth capacitor C1, the other end of the fifth resistor R7, the other end of the fourth capacitor C4, and the other end of the third capacitor C3. The other end of the sixth capacitor C7 is respectively connected to the other end of the bidirectional voltage stabilizing diode D8, the positive electrode of the fourth diode D7, the other end of the electrolytic capacitor C9, the other end of the first capacitor C11, and GND.

[0012] The 12V power supply is input into the first low dropout linear regulator LOD1. The first low dropout linear regulator LOD1 is respectively connected to one end of the seventh capacitor C15 and one end of the second low dropout linear regulator LOD2, and outputs a 5V power supply. The other end of the second low dropout linear regulator LOD2 is connected to one end of the eighth capacitor C16 and outputs a 3.3V power supply. The other end of the seventh capacitor C15 is respectively connected to the other end of the eighth capacitor C16, the third terminal of the first low dropout linear regulator LOD1, and GND.

[0013] Further, in the Bluetooth communication unit, the VCC terminal of the Bluetooth communication module is respectively connected to the 3.3V power supply and one end of the ninth capacitor C22. The GND terminal of the Bluetooth communication module is respectively connected to the other end of the ninth capacitor C22 and GND. The AT0 terminal of the Bluetooth communication module is connected to one end of the sixth resistor R18. The other end of the sixth resistor R18 is connected to BLE_AT of the MCU data processor. The TXD0 terminal of the Bluetooth communication module is connected to one end of the seventh resistor R17. The other end of the seventh resistor R17 is connected to BLE_RXD of the MCU data processor. The RXD0 terminal of the Bluetooth communication module is connected to one end of the eighth resistor R15. The other end of the eighth resistor R15 is connected to BLE_TXD of the MCU data processor. The RST# terminal of the Bluetooth communication module is respectively connected to one end of the ninth resistor R14 and one end of the tenth capacitor C19. The other end of the ninth resistor R14 is connected to the 3.3V power supply. The other end of the tenth capacitor C19 is grounded.

[0014] Further, in the trip action execution unit, TRIP_CMD of the MCU data processor is connected to one end of the D / A signal processing circuit. The other end of the D / A signal processing circuit is connected to one end of the tenth resistor R3. The other end of the tenth resistor R3 is respectively connected to one end of the eleventh resistor R4 and the gate of the MOS transistor Q2. The other end of the eleventh resistor R4 is grounded. The source of the MOS transistor Q2 is grounded. The drain of the MOS transistor Q2 is respectively connected to the positive electrode of the sixth diode D2 and the TRIP- terminal of the flux trip. The negative electrode of the sixth diode D2 is respectively connected to the negative electrode of the seventh diode D1 and the TRIP+ terminal of the flux trip. The positive electrode of the seventh diode D1 is connected to the 12V power supply.

[0015] The flux trip is connected to the intelligent molded case circuit breaker.

[0016] Further, in the current transformer of the current transformer sampling unit, one end of the third inductor is respectively connected to one end of the tenth resistor R10 and one end of the eleventh resistor R8. The other end of the tenth resistor R10 is respectively connected to one end of the twelfth resistor R11 and GND. The other end of the eleventh resistor R8 is connected to one end of the eleventh capacitor C5. The other end of the eleventh capacitor C5 is respectively connected to one end of the twelfth capacitor C8 and GND. The other end of the third inductor is respectively connected to the other end of the twelfth resistor R11 and one end of the thirteenth resistor R12. The other end of the thirteenth resistor R12 is connected to the other end of the twelfth capacitor C8.

[0017] The current transformer is connected to the busbar of the intelligent molded case circuit breaker.

[0018] The HT_CS, HT_SCK, HT_MOSI, HT_MISO, and HT_SLP of the MCU data processor are connected to the ADC analog-to-digital signal converter.

[0019] Furthermore, the current transformer sampling unit obtains the AC current signals of phases A, B, C, and N in the intelligent molded case circuit breaker. Through the electromagnetic induction of the current transformer, a current signal is obtained. This signal is converted into a voltage signal through a signal amplification and conditioning circuit, and then through the sampling process of the ADC, a digital signal is obtained.

[0020] The digital signal is transmitted to the single-chip microcomputer data processing unit. Through the sampling process of the MCU data processor, a binary current value is obtained. This value is stored in the data memory, and through the display and communication processing of the first peripheral circuit, the effective value of the current is obtained.

[0021] The effective value of the current is transmitted to the trip action execution unit. When the effective value of the current exceeds any one of the short-circuit protection current, overload protection current, short-circuit short-time delay protection current, and short-circuit long-time delay protection current, a trip instruction is issued. This instruction is converted through the D / A signal processing circuit to obtain an AC pulse signal. This signal is converted through the flux tripping device to obtain an execution command, and the flux tripping device is used to push the traction rod to trip the switch of the intelligent molded case circuit breaker, cutting off the main circuit, and realizing the operation of disconnecting the intelligent molded case circuit breaker.

[0022] The effective value of the current is transmitted to the liquid crystal display unit for display; the effective value of the current is transmitted to the Bluetooth communication unit and sent to the intelligent terminal through wireless communication, and the parameter setting instruction sent by the intelligent terminal is received.

[0023] The voltage source connected to the incoming line busbar of the intelligent molded case circuit breaker is transmitted to the power supply unit. After rectification and filtering by a full-wave rectifier bridge, a high-voltage DC voltage is obtained. This voltage is stepped down by an AC / DC conversion chip to obtain a 12V low-voltage DC voltage. This voltage is rectified by a diode to obtain a +12V first voltage. This voltage is current-limited by a resistor to obtain a current-limited protected voltage. This voltage is filtered by a capacitor to obtain a +12V second voltage. This voltage is further filtered by an inductor to obtain a +12V third voltage. This voltage is stepped down by a low-dropout linear voltage regulator to obtain voltage sources of +5V and +3.3V.

[0024] Further, the value range of the short-circuit protection current is between 5 and 10 times the rated current of the trip action execution unit; the value range of the overload protection current is between 0.7 and 1 times the short-circuit protection current; the value range of the short-circuit short-delay protection current is between 1.5 and 10 times the overload protection current; the value range of the short-circuit long-delay protection current is between 0.7 and 1 times the rated current of the trip action execution unit.

[0025] Compared with the prior art, the present invention adopts the above technical solutions and has the following technical effects:

[0026] The present invention can not only flexibly set or read the parameters of the intelligent molded case switch controller through Bluetooth, but also monitor and control the current of the main circuit more flexibly and conveniently. In addition, it greatly improves the intelligent monitoring, display and automation level of the intelligent molded case switch circuit breaker, and can be widely applied to various models of intelligent molded case switch circuit breakers. Description of the Drawings

[0027] Figure 1 It is the overall structure diagram of the controller of the present invention.

[0028] Figure 2 It is the connection schematic diagram of the controller of the present invention and the intelligent molded case switch circuit breaker.

[0029] Figure 3 It is the schematic diagram of the liquid crystal display unit of the present invention.

[0030] Figure 4 It is the schematic diagram of the power supply unit of the present invention.

[0031] Figure 5 It is the schematic diagram of the Bluetooth communication unit of the present invention.

[0032] Figure 6 It is the schematic diagram of the trip action execution unit of the present invention.

[0033] Figure 7 It is the schematic diagram of the current transformer of the present invention. Detailed Embodiments

[0034] The present invention will be further described below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0035] To achieve the above object, the present invention provides an intelligent molded case switch controller with Bluetooth communication function, as Figure 1 shown, including:

[0036] A current transformer sampling unit, a power supply unit, a single-chip microcomputer data processing unit, a trip action execution unit, a liquid crystal display unit and a Bluetooth communication unit.

[0037] The single-chip microcomputer data processing unit is the core unit, which is respectively connected to the current transformer sampling unit, the liquid crystal display unit, the Bluetooth communication unit, and the trip action execution unit; the power supply unit is connected to all units.

[0038] Among them, the current transformer sampling unit includes a current transformer, a signal amplification and conditioning circuit, and an ADC analog-to-digital converter; the single-chip microcomputer data processing unit includes an MCU data processor, a data memory, and a first peripheral circuit; the trip action execution unit includes a D / A signal processing circuit and a flux trip; the liquid crystal display unit includes a liquid crystal display screen and a second peripheral circuit; the Bluetooth communication unit includes a Bluetooth communication module and a third peripheral circuit; the power supply unit includes a full-wave rectifier bridge, an AC / DC conversion chip, a diode, a resistor, a capacitor, an inductor, and a low-dropout linear voltage regulator. The power supply unit converts the input power supply into low-voltage direct current to supply power to the functional modules of each unit.

[0039] As Figure 2 shown, the current transformer of the current transformer sampling unit is connected to the busbar of the intelligent molded case circuit breaker, and the flux trip is connected to the intelligent molded case circuit breaker.

[0040] As Figure 3 shown, in the liquid crystal display unit, the CS, RESET, SCK, and MOSI of the MCU data processor are directly connected to the liquid crystal display screen. The second peripheral circuit includes a first resistor R1, a second resistor R2, and a first triode Q1. The PWER_CTL of the MCU data processor is connected to one end of the second resistor R2. The other end of the second resistor R2 is respectively connected to one end of the first resistor R1 and the base of the first triode Q1. The other end of the first resistor R1 is respectively connected to the emitter of the first triode Q1 and the 3.3V power supply. The collector of the first triode Q1 is connected to the liquid crystal display screen.

[0041] Display information such as display data, alarm signals, and parameter status on the liquid crystal display screen.

[0042] As Figure 4As shown in the figure, in the power supply unit, the anodes of the first diode D3, the second diode D5, and the third diode D6 are all connected to the busbar of the intelligent molded case circuit breaker; the cathodes of the first diode D3, the second diode D5, and the third diode D6 are connected together and are respectively connected to one end of the third resistor R9 and one end of the first capacitor C11; the other end of the third resistor R9 is connected to one end of the first inductor L2, and the other end of the first inductor L2 is respectively connected to one end of the electrolytic capacitor C9 and the SW terminal of the ACDC control bridge U2. The FB terminal of the ACDC control bridge U2 is respectively connected to one end of the fourth capacitor C4, one end of the fourth resistor R5, and one end of the fifth resistor R7. The VDD terminal of the ACDC control bridge U2 is connected to one end of the third capacitor C3. The GND terminal of the ACDC control bridge U2 is respectively connected to the other end of the third capacitor C3, the cathode of the fourth diode D7, and one end of the second inductor L1. The other end of the fourth resistor R5 is respectively connected to one end of the fifth capacitor C1 and the cathode of the fifth diode D4. The anode of the fifth diode D4 is respectively connected to one end of the sixth capacitor C7, the other end of the second inductor L1, and one end of the bidirectional voltage regulator diode D8, and outputs a 12V power supply. One end of the second inductor L1 is respectively connected to the other end of the fifth capacitor C1, the other end of the fifth resistor R7, the other end of the fourth capacitor C4, and the other end of the third capacitor C3. The other end of the sixth capacitor C7 is respectively connected to the other end of the bidirectional voltage regulator diode D8, the anode of the fourth diode D7, the other end of the electrolytic capacitor C9, the other end of the first capacitor C11, and GND.

[0043] The 12V power supply is input into the first low dropout linear regulator LOD1. The first low dropout linear regulator LOD1 is respectively connected to one end of the seventh capacitor C15 and one end of the second low dropout linear regulator LOD2, and outputs a 5V power supply. The other end of the second low dropout linear regulator LOD2 is connected to one end of the eighth capacitor C16 and outputs a 3.3V power supply. The other end of the seventh capacitor C15 is respectively connected to the other end of the eighth capacitor C16, the third terminal of the first low dropout linear regulator LOD1, and GND.

[0044] The voltage source connected to the incoming line busbar of the intelligent molded case circuit breaker is transmitted to the power supply unit. After rectification and filtering by the full-wave rectifier bridge, a high-voltage DC voltage is obtained. This voltage is stepped down by the AC / DC conversion chip to obtain a 12V low-voltage DC voltage. This voltage is rectified by the diode to obtain a +12V first voltage. This voltage is current-limited by the resistor to obtain a voltage after current-limiting protection. This voltage is filtered by the capacitor to obtain a +12V second voltage. This voltage is filtered again by the inductor to obtain a constant and clean +12V third voltage. This voltage is stepped down by the low dropout linear regulator to obtain voltage sources of +5V and +3.3V.

[0045] AsFigure 5 As shown, in the Bluetooth communication unit, the VCC terminal of the Bluetooth communication module is respectively connected to the 3.3V power supply and one end of the ninth capacitor C22. The GND terminal of the Bluetooth communication module is respectively connected to the other end of the ninth capacitor C22 and GND. The AT0 terminal of the Bluetooth communication module is connected to one end of the sixth resistor R18. The other end of the sixth resistor R18 is connected to BLE_AT of the MCU data processor. The TXD0 terminal of the Bluetooth communication module is connected to one end of the seventh resistor R17. The other end of the seventh resistor R17 is connected to BLE_RXD of the MCU data processor. The RXD0 terminal of the Bluetooth communication module is connected to one end of the eighth resistor R15. The other end of the eighth resistor R15 is connected to BLE_TXD of the MCU data processor. The RST# terminal of the Bluetooth communication module is respectively connected to one end of the ninth resistor R14 and one end of the tenth capacitor C19. The other end of the ninth resistor R14 is connected to the 3.3V power supply. The other end of the tenth capacitor C19 is grounded.

[0046] As Figure 6 shown, in the trip action execution unit, TRIP_CMD of the MCU data processor is connected to one end of the D / A signal processing circuit. The other end of the D / A signal processing circuit is connected to one end of the tenth resistor R3. The other end of the tenth resistor R3 is respectively connected to one end of the eleventh resistor R4 and the gate of the MOS transistor Q2. The other end of the eleventh resistor R4 is grounded. The source of the MOS transistor Q2 is grounded. The drain of the MOS transistor Q2 is respectively connected to the positive electrode of the sixth diode D2 and the TRIP- terminal of the flux trip. The negative electrode of the sixth diode D2 is respectively connected to the negative electrode of the seventh diode D1 and the TRIP+ terminal of the flux trip. The positive electrode of the seventh diode D1 is connected to the 12V power supply.

[0047] As Figure 7 shown, in the phase A current transformer, one end of the third inductor is respectively connected to one end of the tenth resistor R10 and one end of the eleventh resistor R8. The other end of the tenth resistor R10 is respectively connected to one end of the twelfth resistor R11 and GND. The other end of the eleventh resistor R8 is connected to one end of the eleventh capacitor C5. The other end of the eleventh capacitor C5 is respectively connected to one end of the twelfth capacitor C8 and GND. The other end of the third inductor is respectively connected to the other end of the twelfth resistor R11 and one end of the thirteenth resistor R12. The other end of the thirteenth resistor R12 is connected to the other end of the twelfth capacitor C8. The connection relationships of the phase B, phase C, and phase N current transformers are the same as those in the phase A current transformer.

[0048] HT_CS, HT_SCK, HT_MOSI, HT_MISO, and HT_SLP of the MCU data processor are connected to the ADC analog-to-digital signal converter.

[0049] The current transformer sampling unit obtains the AC current signals of phases A, B, C, and N in the intelligent molded case circuit breaker. Through the electromagnetic induction of the current transformer, a current signal is obtained. This signal passes through a signal amplification and conditioning circuit and is converted into a voltage signal. This voltage signal undergoes sampling processing by the ADC to obtain a digital signal for the sampling processing of the single-chip microcomputer data processing unit.

[0050] The digital signal is transmitted to the single-chip microcomputer data processing unit. Through the sampling processing of the MCU data processor, a binary current value is obtained. This value is stored in the data memory and, through the display and communication processing of the first peripheral circuit, the effective value of the current is obtained.

[0051] The effective value of the current is transmitted to the trip action execution unit. When the effective value of the current exceeds any one of the short-circuit protection current, overload protection current, short-circuit short-delay protection current, and short-circuit long-delay protection current, a trip command is issued. This command undergoes signal conversion by the D / A signal processing circuit to obtain an AC pulse signal. This signal undergoes conversion by the flux tripping device to obtain an execution command. The flux tripping device is used to push the traction rod to trip the switch of the intelligent molded case circuit breaker, cutting off the main circuit and realizing the operation of tripping the intelligent molded case circuit breaker.

[0052] The effective value of the current is transmitted to the liquid crystal display unit for display; the effective value of the current is transmitted to the Bluetooth communication unit and sent to intelligent terminals such as mobile phones and tablets through wireless communication for data interaction, and parameter setting instructions sent by the intelligent terminals are received.

[0053] The short-circuit protection current is defined as the current value at which the intelligent molded case circuit breaker can instantaneously trip during a short circuit, and its value range is between 5 and 10 times the rated current of the trip action execution unit. The overload protection current is defined as the current value at which the intelligent molded case circuit breaker trips during an overload, and it is usually adjustable, with a value range between 0.7 and 1 times the short-circuit protection current. The short-circuit short-delay protection current is defined as the current value at which the intelligent molded case circuit breaker delays tripping during a short circuit, and its value range is between 1.5 and 10 times the overload protection current. The short-circuit long-delay protection current is defined as a protection mechanism in which the intelligent molded case circuit breaker operates after a long time delay during a short-circuit fault. Its purpose is to cut off the circuit after the short-circuit current lasts for a long time to prevent equipment damage and fire risks, and its value range is between 0.7 and 1 times the rated current of the trip action execution unit.

[0054] The short-delay time is defined as the action time of the short-circuit short-delay protection, and its value range is between 0.1 and 0.5 seconds. When the short-circuit current exceeds the short-circuit short-delay protection current and lasts for the short-delay time, the intelligent molded case circuit breaker should trip.

[0055] The long delay time is defined as the operating time of the overload protection, and its value range is between several seconds and several minutes. When the load current exceeds the short-circuit long delay protection and lasts for the long delay time, the intelligent molded case switch circuit breaker should trip.

[0056] Embodiment:

[0057] The MCU data processor selects the low-power and high-performance STM32 series single-chip microcomputer.

[0058] The intelligent molded case switch controller proposed by the present invention is applicable to intelligent molded case switch circuit breakers with different frame sizes. Therefore, the parameter settings should also be different according to the frame size. When the frame current of the intelligent molded case switch circuit breaker is 100A, the corresponding parameters of the intelligent molded case switch controller are set as follows:

[0059] The rated current (frame current) is 100A, the short-circuit protection current is 500A, the overload protection current is 80A, the short-circuit short delay protection current is 300A, the short-circuit long delay protection current is 100A, the short delay time is 0.2 seconds, and the long delay time is 10 seconds.

[0060] Before the intelligent molded case switch controller proposed by the present invention is used, the parameters are set through the Bluetooth communication unit.

[0061] The intelligent molded case switch controller proposed by the present invention can be installed without changing the existing electrical structure and the outer shell installation structure of the intelligent molded case circuit breaker. Only need to install the controller at the installation position of the original molded case controller of the intelligent molded case circuit breaker, connect the connecting wire of the current transformer to the transformer wiring seat of the controller, and at the same time connect the magnetic flux drive control wire to the wiring seat for driving the magnetic flux. In this way, as long as the intelligent molded case circuit breaker is powered on, the parameters of the molded case controller can be set or read through the Bluetooth communication method, the main circuit current can be sampled and monitored, and according to the monitored current value and the preset relevant parameters, it is decided whether to break the main circuit current, overcurrent protection and overheat protection are carried out, and the monitored values and fault values are visually displayed and stored to achieve intelligent monitoring and control.

[0062] In summary, through the intelligent molded case switch controller proposed by the present invention, not only can the current of the main circuit be measured, calculated and processed and tripped and disconnected according to the calculation result, but also the parameters such as current, time, and fault status are visually displayed. At the same time, the parameters of the switch controller can be flexibly set through the Bluetooth method, which greatly improves the automation degree of the molded case intelligent controller and is convenient for on-site staff to observe and operate.

[0063] Importantly, it should be noted that the construction and arrangement of the present application shown in multiple different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible without materially departing from the novel teachings and advantages of the subject matter described in this application (e.g., changes in the dimensions, scales, structures, shapes and proportions of various elements, as well as parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, colors, orientations, etc.). For example, an element shown as integrally formed may be composed of multiple parts or elements, the positions of the elements may be inverted or otherwise changed, and the nature, number or position of discrete elements may be altered or changed. Accordingly, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be altered or reordered according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover the structures that perform the recited function as described herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0064] In addition, in order to provide a concise description of the exemplary embodiments, not all features of the actual embodiments may be described (i.e., those features that are not relevant to the currently contemplated best mode of carrying out the present invention or those that are not relevant to the implementation of the present invention).

[0065] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous specific implementation decisions may be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, without undue experimentation, such development efforts will be a routine task of design, fabrication and production.

[0066] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An intelligent plastic case switch controller with Bluetooth communication function, characterized in that, Comprising: A current transformer sampling unit, a power supply unit, a single-chip microcomputer data processing unit, a tripping action execution unit, a liquid crystal display unit, and a Bluetooth communication unit; The single-chip microcomputer data processing unit is respectively connected to the current transformer sampling unit, the liquid crystal display unit, the Bluetooth communication unit, and the tripping action execution unit; the power supply unit is connected to all units; Among them, the current transformer sampling unit includes a current transformer, a signal amplification and conditioning circuit, and an ADC analog signal digital converter; the single-chip microcomputer data processing unit includes an MCU data processor, a data memory, and a first peripheral circuit; the tripping action execution unit includes a D / A signal processing circuit and a flux tripping device; the liquid crystal display unit includes a liquid crystal display screen and a second peripheral circuit; the Bluetooth communication unit includes a Bluetooth communication module and a third peripheral circuit; the power supply unit includes a full-wave rectifier bridge, an AC / DC conversion chip, a diode, a resistor, a capacitor, an inductor, and a low-dropout linear voltage regulator, and the power supply unit is used for power supply.

2. The intelligent plastic case switch controller with Bluetooth communication function according to claim 1, characterized in that, In the liquid crystal display unit, the second peripheral circuit includes a first resistor R1, a second resistor R2, and a first triode Q1. The PWER_CTL of the MCU data processor is connected to one end of the second resistor R2. The other end of the second resistor R2 is respectively connected to one end of the first resistor R1 and the base of the first triode Q1. The other end of the first resistor R1 is respectively connected to the emitter of the first triode Q1 and the 3.3V power supply. The collector of the first triode Q1 is connected to the liquid crystal display screen; The CS, RESET, SCK, and MOSI of the MCU data processor are directly connected to the liquid crystal display screen.

3. The intelligent plastic shell switch controller with Bluetooth communication function according to claim 1, characterized in that, In the power supply unit, the anodes of the first diode D3, the second diode D5, and the third diode D6 are all connected to the busbar of the intelligent molded case switch circuit breaker; the cathodes of the first diode D3, the second diode D5, and the third diode D6 are connected to each other and are respectively connected to one end of the third resistor R9 and one end of the first capacitor C11; the other end of the third resistor R9 is connected to one end of the first inductor L2, and the other end of the first inductor L2 is respectively connected to one end of the electrolytic capacitor C9 and the SW terminal of the ACDC control bridge U2. The FB terminal of the ACDC control bridge U2 is respectively connected to one end of the fourth capacitor C4, one end of the fourth resistor R5, and one end of the fifth resistor R7. The VDD terminal of the ACDC control bridge U2 is connected to one end of the third capacitor C3. The GND terminal of the ACDC control bridge U2 is respectively connected to the other end of the third capacitor C3, the cathode of the fourth diode D7, and one end of the second inductor L1; the other end of the fourth resistor R5 is respectively connected to one end of the fifth capacitor C1 and the cathode of the fifth diode D4; the anode of the fifth diode D4 is respectively connected to one end of the sixth capacitor C7, the other end of the second inductor L1, and one end of the bidirectional voltage regulator diode D8, and outputs a 12V power supply; one end of the second inductor L1 is respectively connected to the other end of the fifth capacitor C1, the other end of the fifth resistor R7, the other end of the fourth capacitor C4, and the other end of the third capacitor C3; the other end of the sixth capacitor C7 is respectively connected to the other end of the bidirectional voltage regulator diode D8, the anode of the fourth diode D7, the other end of the electrolytic capacitor C9, the other end of the first capacitor C11, and GND; The 12V power supply is input into the first low dropout linear regulator LOD1. The first low dropout linear regulator LOD1 is respectively connected to one end of the seventh capacitor C15 and one end of the second low dropout linear regulator LOD2, and outputs a 5V power supply; the other end of the second low dropout linear regulator LOD2 is connected to one end of the eighth capacitor C16 and outputs a 3.3V power supply; the other end of the seventh capacitor C15 is respectively connected to the other end of the eighth capacitor C16, the third terminal of the first low dropout linear regulator LOD1, and GND.

4. The intelligent plastic shell switch controller with Bluetooth communication function according to claim 1, characterized in that, In the Bluetooth communication unit, the VCC terminal of the Bluetooth communication module is respectively connected to the 3.3V power supply and one end of the ninth capacitor C22. The GND terminal of the Bluetooth communication module is respectively connected to the other end of the ninth capacitor C22 and GND. The AT0 terminal of the Bluetooth communication module is connected to one end of the sixth resistor R18. The other end of the sixth resistor R18 is connected to BLE_AT of the MCU data processor. The TXD0 terminal of the Bluetooth communication module is connected to one end of the seventh resistor R17. The other end of the seventh resistor R17 is connected to BLE_RXD of the MCU data processor. The RXD0 terminal of the Bluetooth communication module is connected to one end of the eighth resistor R15. The other end of the eighth resistor R15 is connected to BLE_TXD of the MCU data processor. The RST# terminal of the Bluetooth communication module is respectively connected to one end of the ninth resistor R14 and one end of the tenth capacitor C19. The other end of the ninth resistor R14 is connected to the 3.3V power supply. The other end of the tenth capacitor C19 is grounded.

5. The intelligent plastic case switch controller with Bluetooth communication function according to claim 1, characterized in that, In the trip action execution unit, TRIP_CMD of the MCU data processor is connected to one end of the D / A signal processing circuit. The other end of the D / A signal processing circuit is connected to one end of the tenth resistor R3. The other end of the tenth resistor R3 is respectively connected to one end of the eleventh resistor R4 and the gate of the MOS transistor Q2. The other end of the eleventh resistor R4 is grounded. The source of the MOS transistor Q2 is grounded. The drain of the MOS transistor Q2 is respectively connected to the positive electrode of the sixth diode D2 and the TRIP- terminal of the flux tripping device. The negative electrode of the sixth diode D2 is respectively connected to the negative electrode of the seventh diode D1 and the TRIP+ terminal of the flux tripping device. The positive electrode of the seventh diode D1 is connected to the 12V power supply; The flux tripping device is connected to the intelligent molded case circuit breaker.

6. The intelligent plastic shell switch controller with Bluetooth communication function according to claim 3, characterized in that, In the current transformer of the current transformer sampling unit, one end of the third inductor is respectively connected to one end of the tenth resistor R10 and one end of the eleventh resistor R8. The other end of the tenth resistor R10 is respectively connected to one end of the twelfth resistor R11 and GND. The other end of the eleventh resistor R8 is connected to one end of the eleventh capacitor C5. The other end of the eleventh capacitor C5 is respectively connected to one end of the twelfth capacitor C8 and GND. The other end of the third inductor is respectively connected to the other end of the twelfth resistor R11 and one end of the thirteenth resistor R12. The other end of the thirteenth resistor R12 is connected to the other end of the twelfth capacitor C8; The current transformer is connected to the busbar of the intelligent molded case circuit breaker; HT_CS, HT_SCK, HT_MOSI, HT_MISO, and HT_SLP of the MCU data processor are connected to the ADC analog-to-digital signal converter.

7. The intelligent plastic shell switch controller with Bluetooth communication function according to claim 6, characterized in that, The current transformer sampling unit obtains the AC current signals of phases A, B, C, and N in the intelligent molded case circuit breaker. Through the electromagnetic induction of the current transformer, a current signal is obtained. This signal passes through the signal amplification and conditioning circuit and is converted into a voltage signal. This signal undergoes sampling processing by the ADC to obtain a digital quantity signal; The digital signal is transmitted to the single-chip microcomputer data processing unit. After sampling and processing by the MCU data processor, a binary current value is obtained. This value is stored in the data memory and, through the display and communication processing of the first peripheral circuit, the effective value of the current is obtained. The effective value of the current is transmitted to the tripping action execution unit. When the effective value of the current exceeds any one of the short-circuit protection current, overload protection current, short-circuit short-time delay protection current, and short-circuit long-time delay protection current, a tripping instruction is issued. This instruction undergoes signal conversion through the D / A signal processing circuit to obtain an AC pulse signal. This signal undergoes conversion through the flux tripper to obtain an execution command, and the traction rod is pushed by the flux tripper to trip the switch of the intelligent molded case circuit breaker, cutting off the main circuit and realizing the operation of breaking the intelligent molded case circuit breaker. The effective value of the current is transmitted to the liquid crystal display unit for display; the effective value of the current is transmitted to the Bluetooth communication unit and sent to the intelligent terminal through wireless communication, and a parameter setting instruction sent by the intelligent terminal is received. The voltage source connected to the incoming line busbar of the intelligent molded case circuit breaker is transmitted to the power supply unit. After rectification and filtering by the full-wave rectifier bridge, a high-voltage DC voltage is obtained. This voltage undergoes step-down through the AC / DC conversion chip to obtain a 12V low-voltage DC voltage. This voltage undergoes rectification through the diode to obtain a +12V first voltage. This voltage undergoes current limiting through the resistor to obtain a voltage after current limiting protection. This voltage undergoes filtering through the capacitor to obtain a +12V second voltage. This voltage undergoes further filtering through the inductor to obtain a +12V third voltage. This voltage undergoes step-down through the low-dropout linear regulator to obtain voltage sources of +5V and +3.3V.

8. The intelligent plastic case switch controller with Bluetooth communication function according to claim 7, characterized in that, The value range of the short-circuit protection current is between 5 and 10 times the rated current of the tripping action execution unit; the value range of the overload protection current is between 0.7 and 1 times the short-circuit protection current; the value range of the short-circuit short-time delay protection current is between 1.5 and 10 times the overload protection current; the value range of the short-circuit long-time delay protection current is between 0.7 and 1 times the rated current of the tripping action execution unit.

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