Safety isolation power supply

Abstract

The utility model discloses a safety isolation power supply which is characterized in that a high-voltage box is provided with a plug access unit, a fuse, a first current regulation and control unit, a voltage regulation unit, a first filtering unit and a magnetic field driving unit, and a low-voltage box is provided with a magnetic field receiving unit, a second current regulation and control unit, a second filtering unit, a voltage stabilization output unit and a state indication unit. The first current regulation and control unit converts commercial power received by the plug access unit and generates magnetic field signals through the voltage regulation unit, the first filtering unit and the magnetic field driving unit, the magnetic field receiving unit receives the magnetic field signals and induces and outputs alternating current signals, and the second current regulation and control unit processes the alternating current signals and outputs direct current. A complete isolation power supply mode is adopted, the high-voltage box and the low-voltage box have multiple circuit modes, the problems of electric shock safety and fire safety of electric appliances are solved, and the working stability of the safe isolation power supply is improved.

Description

Technical Field

[0001] This utility model belongs to the field of power adapter technology, and in particular relates to a safe isolated power supply. Background Technology

[0002] Currently, most power adapters for handheld electronic products use switching power supplies, such as... Figure 1 Switching power supplies mainly consist of transformers and Y capacitors. Transformers typically have a high-voltage primary and a low-voltage secondary, insulated only by adhesive tape and paint. The Y capacitor is connected between the high-voltage and low-voltage grounds for interference suppression, but it is prone to damage or poor insulation. Therefore, low creepage insulation in the transformer or leakage in the Y capacitor can easily cause high voltage at the output, potentially leading to electric shock. Thus, there is an urgent need to provide a safe and isolated power supply to address these technical problems. Utility Model Content

[0003] To address the aforementioned issues, this utility model provides a safe isolated power supply that can solve the problems of electric shock safety and fire safety for handheld electronic products, and improves the operational stability of the safe isolated power supply.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model provides a safe isolated power supply, including a detachably connected high-voltage box and a low-voltage box. The high-voltage box includes a plug access unit, a fuse, a first current regulation unit, a voltage regulation unit, a first filter unit, and a magnetic field drive unit connected in sequence. The low-voltage box includes a magnetic field receiving unit, a second current regulation unit, a second filter unit, a regulated output unit, and a status indicator unit connected in sequence. The plug access unit is used to receive mains power, the first current regulation unit is used to convert the mains power into DC voltage, and the DC voltage is processed by the voltage regulation unit, the first filter unit, and the magnetic field drive unit to generate a magnetic field signal.

[0006] The magnetic field receiving unit is used to receive the magnetic field signal of the magnetic field driving unit and sense and output an AC signal. The second current regulation unit is used to process the output AC signal and output DC power. The second filtering unit is used to filter the DC power to obtain pure DC power. The pure DC power is loaded onto the voltage regulation output unit for voltage regulation and sent to the status indication unit.

[0007] As a preferred embodiment of the above technical solution, the high-voltage box includes at least one circuit mode, and the low-voltage box includes at least one circuit mode.

[0008] As a preferred embodiment of the above technical solution, the first circuit mode of the high-voltage box includes a P1 connector, a fuse F1, a first branch, and a second branch. The first branch includes a full-bridge diode D3, capacitors C3 and C4, a coil L1, a switching transistor Q1, resistors R10 and R11, a diode D13, an integrated circuit U2, resistors R7 and R20, a capacitor C18, a diode D5, a P4 terminal, and a diode D2. The P1 connector is used to receive mains power. The full-bridge diode D3 is used to rectify the current output from the fuse F1. The capacitor C3 is used to store energy and smooth out the pulsation gap. The resistor R10 is used to drive current limiting, and the resistor R11 is used to turn off... The circuit includes a fault compensation mechanism. Diode D13 is used for high-voltage protection. Resistor R7 is used for current sampling and outputting the current signal. Resistor R20 and capacitor C18 form an RC low-pass regulator. Terminal P4 is used to connect to the cooling fan. Diode D2 is used to prevent interference from the fan motor. The full-bridge diode D3, switching transistor Q1, and resistor R10 belong to the first current regulation unit. Capacitor C4 belongs to the first filtering unit. Diode D13 belongs to the voltage regulation unit. Coil L1 belongs to the magnetic field drive unit. Resistor R20 and capacitor C18 belong to the first filtering unit, and coil L1 belongs to the magnetic field drive unit.

[0009] The second branch includes capacitor C9, capacitor C10, resistors R13 and R14, a full-bridge diode D10, diodes D11 and D12, capacitors C13, C14, C15, C16, and C17, resistors R17, R18, R19, and R21. Capacitors C9, C10, R13, and R14 form an RC current-limiting circuit. The full-bridge diode D10 is used for rectification to obtain pulsating DC power. Diodes D11 and D12 are used for voltage reduction. C13 is used for anti-interference filtering, C14 is used for energy storage and smoothing out the pulsation gap, C15, C16, C17, R17, R18, R19 and R21 form the peripheral circuit of the integrated circuit U2, wherein C9, C10, R13, R14 and the full-bridge D10 belong to the first current regulation unit, D11 and D12 belong to the voltage regulation unit, and C13 belongs to the first filtering unit.

[0010] As a preferred embodiment of the above technical solution, the second circuit mode of the high-voltage box includes a P10 connector, fuse F4, half-bridge D21, capacitor C31, capacitor C32, a third branch, and a fourth branch. The third branch includes a coil L10, a switching transistor Q5, resistor R34, resistor R35, diode D27, integrated circuit U5, resistor R33, resistor R45, capacitor C46, ​​diode D20, a P9 terminal, and diode D19. The P10 connector is used to receive mains power. The half-bridge D21 is used to rectify the current output by the fuse F4. The capacitor C31 is used to store energy and smooth out the pulsation gap. The capacitor C32 is used for anti-interference filtering. The coil L10 is used to load electromagnetic conversion. The switching transistor Q5 and... The resistor R34 is used for drive current limiting, the resistor R35 is used for turn-off compensation, the diode D27 is used for high voltage protection, the resistor R33 is used for current sampling and outputting a current signal, the resistor R45 and the capacitor C46 form an RC low-pass filter to regulate the current signal, the coil L10 is used for electromagnetic conversion, the diode D20, the P9 terminal is used to connect to the cooling fan, the diode D19 is used to prevent interference from the fan motor, wherein the half-bridge D21, the switching transistor Q5, and the resistor R34 belong to the first current regulation unit, the resistor R45 and the capacitor C46 belong to the first filtering unit, the diode D27 belongs to the voltage regulation unit, and the coil L10 belongs to the magnetic field drive unit;

[0011] The fourth branch includes a voltage regulator chip VR1, diodes D22 and D24, capacitor C33, resistor R38, inductor L13, capacitor C38, resistor R40, capacitor C35, chip U12, inductor L11, diode D23, resistor R39, resistor R41, capacitor C34, capacitor C42, capacitor C41, integrated circuit U5, capacitor C44, capacitor C43, capacitor C45, resistors R42, resistor R43, resistor R44, and resistor R46. The voltage regulator chip VR1, diodes D22 and D24, capacitor C33, resistor R38, inductor L13, and capacitor C38... 8. Resistor R40 forms a switching buck regulator circuit. Capacitors C35 and C41 are used for anti-interference filtering. Chip U12, inductor L11, diode D23, resistors R39 and R41, capacitors C34 and C42 form a boost regulator circuit. Capacitors C44, C43, and C45, resistors R42, R43, R44, and R46 are peripheral circuits of integrated circuit U5. The switching buck regulator circuit and the boost regulator circuit belong to the voltage regulation unit, and capacitors C35 and C41 belong to the first filtering unit.

[0012] As a preferred embodiment of the above technical solution, the third circuit mode of the high-voltage box includes a P2 connector, a fuse F2, a resistor R8, a capacitor C2, a full-bridge diode D4, a diode D6, a diode D7, a switching transistor Q2, a switching transistor Q3, a resistor R15, a resistor R16, a coil L2, a coil L3, a capacitor C5, and a capacitor C6. The P2 connector is used to connect to AC power. The resistor R8 and the capacitor C2 form an RC circuit for current limiting to obtain an AC voltage source. The full-bridge diode D4 is used to rectify the AC voltage source to obtain a DC voltage source. The diode D6... A step-down oscillation circuit is composed of diode D7, switching transistors Q2 and Q3, resistors R15 and R16, coils L2 and L3. The coils L2 and L3 cross to generate a magnetic field that drives the low-voltage box. Capacitors C5 and C6 are used for power supply filtering. Among them, the full-bridge diode D4, resistor R8, and capacitor C2 belong to the first current regulation unit, the step-down oscillation circuit belongs to the voltage regulation unit, coils L2 and L3 belong to the magnetic field driving unit, and capacitors C5 and C6 belong to the first filtering unit.

[0013] As a preferred embodiment of the above technical solution, the fourth circuit mode of the high-voltage box includes a P7 connector, a fuse F3, a resistor R22, a capacitor C29, a full-bridge circuit D15, a switching transistor Q4, a resistor R30, a resistor R31, a coil L7, a coil L6, capacitors C23 and C24. The P7 connector is used to connect to AC power. The resistor R22 and capacitor C29 form an RC circuit for current limiting to obtain an AC voltage source. The full-bridge circuit D15 is used to rectify the AC voltage source to obtain a DC voltage source. The switching transistor Q4, the fuse F3, a resistor R22, a capacitor C29, a full-bridge circuit D15, a switching transistor Q4, a resistor R30, a resistor R31, a coil L7, a coil L6, a capacitor C23, and a capacitor C24. The P7 connector is used to connect to AC power. The resistor R22 and capacitor C29 form an RC circuit for current limiting to obtain an AC voltage source. The full-bridge circuit D15 is used to rectify the AC voltage source to obtain a DC voltage source. The switching transistor Q4, the fuse F3, a resistor R22, a capacitor C29, a full-bridge circuit D15 ... Resistor R30, resistor R31, coil L7, and coil L6 form a step-down oscillation circuit. Coil L6 and coil L7 cross to generate a magnetic field that drives the low-voltage box. Capacitors C23 and C24 are used for power supply filtering. The full-bridge D15, resistor R22, and capacitor C29 belong to the first current regulation unit. The step-down oscillation circuit belongs to the voltage regulation unit. Coil L6 and coil L7 belong to the magnetic field driving unit. Capacitors C23 and C24 belong to the first filtering unit.

[0014] As a preferred embodiment of the above technical solution, the first circuit mode of the low-voltage box includes coil L5, full-bridge D9, capacitor C11, capacitor C12, chip U1, diode D8, coil L4, capacitor C7, capacitor C8, resistor R9, resistor R4, resistor R5, P5 socket, chip U25, resistor R3, capacitor C1, resistor R1, diode D1, resistor R2, and indicator light D32. Coil L5 is used to receive a magnetic field and induce an AC signal output. The full-bridge D9 is used to rectify the AC signal and output pulsating DC. Capacitor C11 is used to store energy and smooth the pulsation gap. Capacitor C12 is used for anti-interference filtering to obtain pure DC power. The components include chip U1, diode D8, coil L4, capacitor C7, capacitor C8, resistor R9, and resistor R4. A voltage regulator circuit composed of resistor R5 is used to regulate the pure DC power. The P5 socket is used to output the regulated pure DC power to the appliance. The P5 socket is used for communication encoding according to the PD protocol of the appliance. The chip U25, resistor R3, capacitor C1 and resistor R1 form a PD protocol circuit and are used to decode to obtain the output control signal. The voltage regulator circuit receives the output control signal and supplies power to the indicator light D32 through resistor R2 to indicate the output status. Among them, coil L5 belongs to the magnetic field receiving unit, full bridge D9 belongs to the second current regulation unit, voltage regulator circuit and P5 socket belong to the voltage regulation output unit, capacitor C12 belongs to the second filtering unit, and resistor R2 and indicator light D32 belong to the status indication unit.

[0015] As a preferred embodiment of the above technical solution, the second circuit mode of the low-voltage box includes coil L9, diode D16, diode D18, capacitors C20, C21, C27, C28, C29, C30, chip U3, diode D17, coil L8, capacitor C25, capacitor C26, resistors R25, R26, R27, P8 socket, chip U6, resistor R24, capacitor C19, resistor R22, diode D14, resistor R23, and indicator light D28. Coil L9 receives a magnetic field and senses and outputs an AC signal. Diodes D16, D18, C20, C21, C27, and C28 form a boost circuit and process the AC signal to obtain a DC signal. Capacitors C29 and C30 filter the DC signal to obtain pure DC power. Chip U3, diode D18, C29, C20, C21, C27, and C28 form a boost circuit and process the AC signal to obtain a DC signal. 17. Coil L8, capacitors C25 and C26, resistors R25, R26, and R27 form a voltage regulator circuit to regulate the pure DC power. The P8 socket is used to output the regulated pure DC power to the appliance. The P8 socket is also used for communication encoding according to the PD protocol of the appliance. Chip U6, resistor R24, capacitor C19, and resistor R22 form a PD protocol circuit and are used to decode and obtain the output control signal. The voltage regulator circuit receives the output DC signal through diode D14 and supplies power to indicator light D28 through resistor R23 to indicate the output status. Among them, coil L9 belongs to the magnetic field receiving unit, the boost circuit, the voltage regulator circuit, and the P8 socket belong to the voltage regulation output unit, capacitors C29 and C30 belong to the second filtering unit, and resistor R23 and indicator light D28 belong to the status indication unit.

[0016] As a preferred embodiment of the above technical solution, the third circuit mode of the low-voltage box includes coil L14, diode D26, capacitor C39, capacitor C40, chip U4, diode D25, coil L12, capacitor C36, capacitor C37, P11 socket, resistor R37, and indicator light D36. Coil L14 receives a magnetic field and senses and outputs an AC signal. Diode D26 rectifies the AC signal and sends it to capacitor C39. Capacitor C39 stores energy and smooths out the pulsation gap to obtain a DC signal. Capacitor C40 performs anti-interference filtering on the DC signal to obtain a pure signal. The DC power supply is regulated by a voltage regulator circuit consisting of chip U4, diode D25, coil L12, capacitor C36, and capacitor C37. The P11 socket outputs the regulated DC power, which is then supplied to indicator light D36 by capacitor C37 to indicate the output status. Coil L14 is a magnetic field receiving unit, diode D26 is a second current regulation output unit, the voltage regulator circuit and P11 socket constitute a voltage regulation output unit, capacitor C40 is a second filtering unit, and capacitor C37 and indicator light D36 constitute a status indication unit.

[0017] As a preferred embodiment of the above technical solution, the high-voltage box and the low-voltage box are connected by ABS outer shell fasteners and magnetic attraction.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] By incorporating a plug-in unit, fuse, first current regulation unit, voltage regulation unit, first filter unit, and magnetic field drive unit in the high-voltage box, and a magnetic field receiving unit, second current regulation unit, second filter unit, regulated output unit, and status indicator unit in the low-voltage box, the system utilizes a fully isolated power supply. The high-voltage and low-voltage boxes feature multiple circuit modes, addressing electrical safety and fire safety issues, and improving the operational stability of the safety isolation power supply. Attached Figure Description

[0020] Figure 1 The circuit diagram of the existing proposed switching power supply;

[0021] Figure 2 This is a structural block diagram of the safety isolation power supply proposed in this utility model;

[0022] Figure 3 This is a schematic diagram of the high-voltage box and low-voltage box proposed in this utility model;

[0023] Figure 4 The circuit diagram shows the first circuit mode of the high-voltage box proposed in this utility model.

[0024] Figure 5 The circuit diagram shows the second circuit mode of the high-voltage box proposed in this utility model.

[0025] Figure 6 The circuit diagram shows the third circuit mode of the high-voltage box proposed in this utility model.

[0026] Figure 7 The circuit diagram is for the fourth circuit mode of the high-voltage box proposed in this utility model.

[0027] Figure 8 The circuit diagram shows the first circuit mode of the low-voltage box proposed in this utility model.

[0028] Figure 9 The circuit diagram shows the second circuit mode of the low-voltage box proposed in this utility model.

[0029] Figure 10 This is a circuit diagram of the third circuit mode of the low-voltage box proposed in this utility model.

[0030] The symbols for the main components are explained below:

[0031] 100-High voltage box; 110-Plug connection unit; 120-Fuse; 130-First current regulation unit; 140-Voltage regulation unit; 150-First filter unit; 160-Magnetic field drive unit; 200-Low voltage box; 210-Magnetic field receiving unit; 220-Second current regulation unit; 230-Second filter unit; 240-Regulated output unit; 250-Status indication unit. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0033] See Figure 2 and Figure 3This utility model provides a safe isolated power supply, including a detachably connected high-voltage box 100 and a low-voltage box 200. The high-voltage box 100 includes a plug access unit 110, a fuse 120, a first current regulation unit 130, a voltage regulation unit 140, a first filter unit 150, and a magnetic field drive unit 160 connected in sequence. The low-voltage box 200 includes a magnetic field receiving unit 210, a second current regulation unit 220, a second filter unit 230, a voltage regulated output unit 240, and a status indicator unit 250 connected in sequence. The plug access unit 110 is used to receive mains power, the first current regulation unit 130 is used to convert the mains power into DC voltage, and the DC voltage is processed by the voltage regulation unit 140, the first filter unit 150, and the magnetic field drive unit 160 to generate a magnetic field signal.

[0034] The magnetic field receiving unit 210 is used to receive the magnetic field signal of the magnetic field driving unit 160 and sense and output an AC signal. The second current regulation unit 220 is used to process the output AC signal and output DC power. The second filtering unit 230 is used to filter the DC power to obtain pure DC power. The pure DC power is loaded onto the voltage stabilizing output unit 240 for voltage stabilization and sent to the status indication unit 250.

[0035] In this embodiment, the high-voltage box 100 and the low-voltage box 200 are connected by ABS snap-fit ​​fasteners and magnetic attraction. The high-voltage box 100 includes at least one circuit mode, and the low-voltage box 200 includes at least one circuit mode. The high-voltage box 100 and the low-voltage box 200 are connected by ABS snap-fit ​​fasteners and magnetic attraction. Figure 2 As shown, the product consists of two parts: a high-voltage box and a low-voltage box. The high-voltage box has a completely sealed and independent ABS and flame-retardant resin shell, and a magnetic field is generated by a coil inside the high-voltage box. The low-voltage box also has a sealed and independent ABS and flame-retardant resin shell, and a coil inside the low-voltage box senses the magnetic field of the high-voltage box, thus generating electrical energy, which is then output through a regulated USB port. There is no electrical connection between the high-voltage and low-voltage boxes; the only connection is a combination of ABS snap-fit ​​fasteners and magnetic attraction. The high-voltage box receives AC 220V mains power, while the low-voltage box mainly includes voltage regulation and output.

[0036] It should be noted that the high-voltage box 100 includes four circuit modes, and the low-voltage box 200 includes three circuit modes. Preferably, at least one circuit mode from both the high-voltage box 100 and the low-voltage box 200 is used. A completely isolated power supply method is adopted to thoroughly solve the safety issues of electric shock and fire prevention for handheld electronic products. The fire safety problem caused by leakage is as follows: Most handheld electronic products have their casing grounded (negative terminal). When there is a leakage, the danger transmitted by the wire enters the handheld electronic product (electrical appliance), flows out through the casing, and forms a circuit to the ground through the human body. This can cause the relevant electronic components inside the handheld electronic product to break down, overload the lithium battery, and lead to a fire.

[0037] It should be understood that by assembling a plug connection unit 110, a fuse 120, a first current regulation unit 130, a voltage regulation unit 140, a first filter unit 150, and a magnetic field drive unit 160 in the high-voltage box 100, and assembling a magnetic field receiving unit 210, a second current regulation unit 220, a second filter unit 230, a regulated output unit 240, and a status indication unit 250 in the low-voltage box 200, the first current regulation unit 130 converts the mains power received by the plug connection unit 110 and passes it through the voltage regulation unit 140, the first filter unit 150, and the magnetic field drive unit 160. The dynamic unit 160 processes the generated magnetic field signal, the magnetic field receiving unit 210 receives the magnetic field signal and senses and outputs an AC signal, the second current regulation unit 220 processes the AC signal to output DC power, the second filtering unit 230 filters the DC power to obtain pure DC power and loads it to the voltage regulation output unit 240 for voltage regulation, and sends it to the status indication unit 250. It adopts a completely isolated power supply method. The high voltage box 100 and the low voltage box 200 have multiple circuit modes, which can solve the problems of electric shock safety of electrical appliances and fire safety, and improve the working stability of the safety isolation power supply.

[0038] Optionally, see Figure 4The first circuit configuration of the high-voltage box 100 includes a P1 connector, a fuse F1, a first branch, and a second branch. The first branch includes a full-bridge diode D3, capacitors C3 and C4, a coil L1, a switching transistor Q1, resistors R10 and R11, a diode D13, an integrated circuit U2, resistors R7 and R20, a capacitor C18, a diode D5, a P4 terminal, and a diode D2. The P1 connector is used to receive mains power. The full-bridge diode D3 is used to rectify the current output from the fuse F1. The capacitor C3 is used to store energy and smooth out the pulsation gap. The resistor R10 is used for driving current limiting. The resistor R11 is used for turn-off compensation. The diode D1... 3 is used for high voltage protection. The resistor R7 is used for current sampling and output current signal. The resistor R20 and capacitor C18 form an RC low-pass regulator. The P4 terminal is used to connect to the cooling fan. The diode D2 is used to prevent interference from the fan motor. The full-bridge diode D3, the switching transistor Q1, and the resistor R10 belong to the first current regulation unit. The capacitor C4 belongs to the first filter unit 150. The diode D13 belongs to the voltage regulation unit 140. The coil L1 belongs to the magnetic field drive unit 160. The resistor R20 and the capacitor C18 belong to the first filter unit 150. The coil L1 belongs to the magnetic field drive unit 160.

[0039] The second branch includes capacitor C9, capacitor C10, resistor R13, resistor R14, full-bridge diode D10, diode D11, diode D12, capacitor C13, capacitor C14, capacitor C15, capacitor C16, capacitor C17, resistor R17, resistor R18, resistor R19, and resistor R21. Capacitors C9, C10, R13, and R14 form an RC current-limiting circuit. The full-bridge diode D10 is used for rectification to obtain pulsating DC power. Diodes D11 and D12 are used for voltage reduction. Capacitor C13 is used for… For anti-interference filtering, capacitor C14 is used to store energy and smooth out the pulsation gap. Capacitors C15, C16, and C17, resistors R17, R18, R19, and R21 constitute the peripheral circuit of integrated circuit U2. Among them, capacitors C9 and C10, resistors R13 and R14, and the full-bridge D10 belong to the first current regulation unit 130. Diodes D11 and D12 belong to the voltage regulation unit 140, and capacitor C13 belongs to the first filter unit 150.

[0040] In this embodiment, the AC 220V mains power is connected through plug P1, and after passing through fuse F1, it is split into two paths: one path is rectified by D3 full-bridge rectifier to obtain a pulsating DC power with a peak voltage of 310V. The pulsation gap is smoothed by energy storage capacitor C3 to make the DC power more stable. Then, after being filtered by anti-interference capacitor C4, it is loaded onto electromagnetic conversion coil L1. After current limiting by switch Q1 and R10, compensation by R11, and high-voltage protection by D13, it is converted into a magnetic field to drive the low-voltage box with the cooperation of integrated circuit U2. At the same time, the current signal output by current sampling resistor R7 is regulated by RC low-pass filter composed of R20 and C18, and the closed-loop power is fed back to integrated circuit U2 to stabilize the magnetic field. The magnetic field conversion is carried out simultaneously using the discharge principle of L1. After being selected by D5, the discharge output from P4 powers the cooling fan, while D2 bypasses interference generated by the fan motor. Another path, via an RC circuit composed of C9, C10, R13, and R14, limits the current. D10 then rectifies the pulsating DC voltage, which is stepped down by D11 and D12. C13 acts as an anti-interference capacitor for filtering, and C14, an energy storage capacitor, smooths out the pulsation gap, ultimately powering integrated circuit U2. C15, C16, C17, R17, R18, R19, and R21 form the peripheral circuitry for integrated circuit U2, ensuring the proper functioning of its internal control circuit, pulse width modulation circuit, and oscillation circuit. The RC circuit primarily powers or drives the circuitry. The chip U2 is model UC3843A-SOP8.

[0041] Optionally, see Figure 5The second circuit mode of the high-voltage box 100 includes a P10 connector, fuse F4, half-bridge D21, capacitor C31, capacitor C32, a third branch, and a fourth branch. The third branch includes a coil L10, a switching transistor Q5, resistor R34, resistor R35, diode D27, integrated circuit U5, resistor R33, resistor R45, capacitor C46, ​​diode D20, a P9 terminal, and diode D19. The P10 connector is used to receive mains power. The half-bridge D21 is used to rectify the current output by the fuse F4. The capacitor C31 is used to store energy and smooth out the pulsation gap. The capacitor C32 is used for anti-interference filtering. The coil L10 is used to load electromagnetic conversion. The switching transistor Q5 and the resistor R34 are used to drive... The current limiting mechanism includes: resistor R35 for shutdown compensation; diode D27 for high voltage protection; resistor R33 for current sampling and outputting a current signal; resistor R45 and capacitor C46 forming an RC low-pass filter to regulate the current signal; coil L10 for electromagnetic conversion; diode D20; terminal P9 for connecting to a cooling fan; diode D19 for preventing interference from the fan motor; half-bridge D21, switching transistor Q5, and resistor R34 belonging to the first current regulation unit 130; resistor R45 and capacitor C46 belonging to the first filter unit 150; diode D27 belonging to the voltage regulation unit 140; and coil L10 belonging to the magnetic field drive unit 160.

[0042] The fourth branch includes a voltage regulator chip VR1, diodes D22 and D24, capacitor C33, resistor R38, inductor L13, capacitor C38, resistor R40, capacitor C35, chip U12, inductor L11, diode D23, resistor R39, resistor R41, capacitor C34, capacitor C42, capacitor C41, integrated circuit U5, capacitor C44, capacitor C43, capacitor C45, resistors R42, R43, R44, and resistor R46. The voltage regulator chip VR1, diodes D22 and D24, capacitor C33, resistor R38, inductor L13, capacitor C38, and... Resistor R40 forms a switching buck regulator circuit. Capacitors C35 and C41 are used for anti-interference filtering. Chip U12, inductor L11, diode D23, resistors R39 and R41, capacitors C34 and C42 form a boost regulator circuit. Capacitors C44, C43, and C45, resistors R42, R43, R44, and R46 are peripheral circuits of integrated circuit U5. The switching buck regulator circuit and the boost regulator circuit belong to the voltage regulation unit 140, and capacitors C35 and C41 belong to the first filter unit 150.

[0043] In this embodiment, the AC 220V mains power is connected through plug P10, rectified by half-bridge rectifier D21 via fuse F4, and the DC power is stabilized by energy storage capacitor C31 to smooth out the pulsation gap. After filtering by anti-interference capacitor C32, it yields approximately 310V DC power, which is divided into two paths: one path loads the electromagnetic conversion coil L10, and is driven by current limiting via switch Q5 and R34, with R35 providing off-compensation and D27 providing high-voltage protection. With the cooperation of integrated circuit U5, it is converted into a magnetic field to drive the low-voltage box. Simultaneously, the current signal output from current sampling resistor R33 is RC low-pass regulated by R45 and C46. Afterwards, the closed-loop power is fed back to integrated circuit U5 to stabilize its magnetic field. Simultaneously, the magnetic field is converted, and the discharge principle of L10 is utilized. The discharge, after being selected by D20, is output from P9 to power the cooling fan, while D19 bypasses interference generated by the fan motor. Another path passes through a switching buck regulator circuit composed of VR1, D22, D24, C33, R38, L13, C38, and R40. After being filtered by anti-interference capacitor C35, the output 5V passes through a boost regulator circuit composed of U12, L11, D23, R39, R41, C34, and C42. This boost regulator is filtered by anti-interference capacitor C41, ultimately powering integrated circuit U5. C44, C43, C45, R42, R43, R44, and R46 are peripheral circuits for integrated circuit U5, ensuring the normal operation of the internal control circuit, pulse width modulation circuit, and oscillation circuit of integrated circuit U5. Among them, the model of chip U12 is SX1308-SOT23-6, the model of voltage regulator chip VR1 is H9805-5v-SOT23, and the model of chip U5 is UC3843A-SOP8.

[0044] Optionally, see Figure 6 The third circuit mode of the high-voltage box 100 includes a P2 connector, fuse F2, resistor R8, capacitor C2, full-bridge diode D4, diode D6, diode D7, switching transistor Q2, switching transistor Q3, resistor R15, resistor R16, coil L2, coil L3, capacitor C5, and capacitor C6. The P2 connector is used to connect to AC power. Resistor R8 and capacitor C2 form an RC circuit for current limiting to obtain an AC voltage source. The full-bridge diode D4 is used to rectify the AC voltage source to obtain a DC voltage source. Diodes D6, D7, and switching transistor Q2... A step-down oscillation circuit is composed of a switching transistor Q3, resistors R15 and R16, and coils L2 and L3. The coils L2 and L3 cross to generate a magnetic field that drives the low-voltage box 200. Capacitors C5 and C6 are used for power supply filtering. The full-bridge transistor D4, resistor R8, and capacitor C2 belong to the first current regulation unit 130. The step-down oscillation circuit belongs to the voltage regulation unit 140. The coils L2 and L3 belong to the magnetic field driving unit 160. Capacitors C5 and C6 belong to the first filtering unit 150.

[0045] In this embodiment, the AC220V mains power is connected through the P2 plug. After passing through the fuse F2, the current is limited by the RC circuit R8 and C2. After current limiting, the AC is rectified by the D4 full-bridge rectifier to obtain a DC voltage, which is applied to the step-down oscillation circuit composed of D6, D7, Q2, Q3, R15, R16, L2, and L3. The magnetic field generated by L2 and L3 is used to drive the low-voltage box. C5 and C6 are used for power supply filtering to ensure stable operation.

[0046] Optionally, see Figure 7 The fourth circuit mode of the high-voltage box 100 includes a P7 connector, fuse F3, resistor R22, capacitor C29, full-bridge circuit D15, switching transistor Q4, resistor R30, resistor R31, coil L7, coil L6, capacitor C23, and capacitor C24. The P7 connector is used to connect to AC power. Resistor R22 and capacitor C29 form an RC circuit for current limiting to obtain an AC voltage source. The full-bridge circuit D15 is used to rectify the AC voltage source to obtain a DC voltage source. The switching transistor Q4, resistor R30, and resistor R31... Coil L7 and coil L6 form a step-down oscillation circuit. The cross-flow of coil L6 and coil L7 generates a magnetic field that drives the low-voltage box. Capacitors C23 and C24 are used for power supply filtering. The full-bridge D15, resistor R22, and capacitor C29 belong to the first current regulation unit 130. The step-down oscillation circuit belongs to the voltage regulation unit 140. Coil L6 and coil L7 belong to the magnetic field driving unit 160. Capacitors C23 and C24 belong to the first filtering unit 150.

[0047] In this embodiment, the AC220V mains power is connected through the P7 plug. After passing through the fuse F3, the current is limited by the RC circuit R22 and C29. After current limiting, the AC is rectified by the full bridge rectifier D15 to obtain a DC voltage, which is applied to the step-down oscillation circuit composed of Q4, R30, R31, L7, and L6. The L6 coil and L7 coil crosswise to generate a magnetic field to drive the low-voltage box. C23 and C24 are power supply filters to ensure stable operation.

[0048] Optionally, referring to 8, the first circuit mode of the low-voltage box 200 includes coil L5, full-bridge D9, capacitor C11, capacitor C12, chip U1, diode D8, coil L4, capacitor C7, capacitor C8, resistor R9, resistor R4, resistor R5, P5 socket, chip U25, resistor R3, capacitor C1, resistor R1, diode D1, resistor R2, and indicator light D32. Coil L5 is used to receive a magnetic field and induce an AC signal output. The full-bridge D9 is used to rectify the AC signal and output pulsating DC. Capacitor C11 is used to store energy and smooth the pulsation gap. Capacitor C12 is used for anti-interference filtering to obtain pure DC power. Chip U1, diode D8, coil L4, capacitor C7, capacitor C8, resistor R9, resistor R4, and resistor R5 form a stable... The voltage regulator circuit is used to regulate the pure DC power. The P5 socket is used to output the regulated pure DC power to the appliance. The P5 socket is used to communicate and encode according to the PD protocol of the appliance. The chip U25, resistor R3, capacitor C1 and resistor R1 form a PD protocol circuit and are used to decode and obtain the output control signal. The voltage regulator circuit receives the output control signal and supplies power to the indicator light D32 through resistor R2 to indicate the output status. Among them, the coil L5 belongs to the magnetic field receiving unit 210, the full bridge D9 belongs to the second current regulation unit 220, the voltage regulator circuit and the P5 socket belong to the voltage regulator output unit 240, the capacitor C12 belongs to the second filter unit 230, and the resistor R2 and the indicator light D32 belong to the status indication unit 250.

[0049] In this embodiment, the L5 coil receives the magnetic field and induces AC output. This AC output is then rectified by the D9 full-bridge rectifier to produce pulsating DC. The C11 energy storage capacitor smooths out the pulsation gap, making the DC more stable. The purified DC, filtered by the C12 anti-interference capacitor, is then applied to a voltage regulator circuit composed of U1, D8, L4, C7, C8, R9, R4, and R5 for regulation. The output is then sent to the P5 socket. Simultaneously, the P5 socket, according to the PD protocol communication code of the electrical product, is decoded by the PD protocol circuit composed of R3, C1, and R1 of the U25 chip. The output control signal, after passing through D1, is input to the control circuit corresponding to the U1 voltage regulator. R2 supplies power to the indicator light D32, indicating the output status. The model of the U25 chip is DK601-SOT23-6.

[0050] Optionally, see Figure 9The second circuit mode of the low-voltage box 200 includes coil L9, diodes D16 and D18, capacitors C20, C21, C27, C28, C29, and C30, chip U3, diode D17, coil L8, capacitors C25 and C26, resistors R25, R26, and R27, a P8 socket, chip U6, resistor R24, capacitor C19, resistor R22, diode D14, resistor R23, and indicator light D28. Coil L9 receives a magnetic field and senses and outputs an AC signal. Diodes D16 and D18, capacitors C20, C21, C27, and C28 form a boost circuit and process the AC signal to obtain a DC signal. Capacitors C29 and C30 filter the DC signal to obtain pure DC power. Chip U3, diode D17, coil L8, and capacitors... C25, C26, R25, R26, and R27 form a voltage regulator circuit to regulate the pure DC power. The P8 socket is used to output the regulated pure DC power to the appliance. The P8 socket is also used for communication encoding according to the PD protocol of the appliance. The chip U6, R24, C19, and R22 form a PD protocol circuit to decode and obtain the output control signal. The voltage regulator circuit receives the output DC signal through the diode D14 and supplies power to the indicator light D28 through the resistor R23 to indicate the output status. The coil L9 belongs to the magnetic field receiving unit 210. The boost circuit, the voltage regulator circuit, and the P8 socket belong to the voltage regulator output unit 240. The capacitors C29 and C30 belong to the second filter unit 230. The resistor R23 and the indicator light D28 belong to the status indication unit 250.

[0051] In this embodiment, the L9 coil receives the magnetic field and induces an AC output. The resulting DC voltage, after being boosted by a bootstrap voltage multiplier (D16, D18, C20, C21, C27, C28), is filtered by C29 and C30 to obtain a clean DC voltage. This DC voltage is then applied to a voltage regulator circuit composed of U3, D17, L8, C25, C26, R25, R26, and R27 for regulation. The output voltage is then supplied through the P8 socket. Simultaneously, the P8 socket, according to the PD protocol communication code of the electrical product, is decoded by a PD protocol circuit composed of U6 chip R24, C19, and R22. The output control signal, after passing through D14, is input to the control circuit corresponding to the U3 voltage regulator. Meanwhile, R23 supplies power to indicator light D28, indicating the output status. The model of chip U6 is DK601-SOT23-6.

[0052] Optionally, see Figure 10The third circuit mode of the low-voltage box 200 includes coil L14, diode D26, capacitor C39, capacitor C40, chip U4, diode D25, coil L12, capacitor C36, capacitor C37, P11 socket, resistor R37, and indicator light D36. Coil L14 receives a magnetic field and senses and outputs an AC signal. Diode D26 rectifies the AC signal and sends it to capacitor C39. Capacitor C39 stores energy and smooths out the pulsation gap to obtain a DC signal. Capacitor C40 performs anti-interference filtering on the DC signal to obtain pure DC power. The chip U4, diode D25, coil L12, capacitor C36, capacitor C37, P11 socket, resistor R37, and indicator light D36... The diode D25, coil L12, capacitor C36, and capacitor C37 form a voltage regulator circuit to regulate the pure DC power. The P11 socket is used to output the regulated pure DC power, and the capacitor C37 supplies power to the indicator light D36 to indicate the output status. The coil L14 belongs to the magnetic field receiving unit 210, the diode D26 belongs to the second current regulation output unit 220, the voltage regulator circuit and the P11 socket belong to the voltage regulator output unit 240, the capacitor C40 belongs to the second filter unit 230, and the capacitor C37 and the indicator light D36 belong to the status indication unit 250.

[0053] In this embodiment, the magnetic field received by coil L14 induces AC output, which is rectified by D26 and the DC voltage with the energy storage capacitor C39 smooths out the pulsating gap is then filtered by anti-interference capacitor C40 to obtain pure DC voltage, which is then applied to the voltage regulator circuit composed of U4, D25, L12, C36, and C37 for voltage regulation. The voltage is output from socket P11, and at the same time, power is supplied to indicator light D36 by R37 to indicate the output status.

[0054] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A safety isolated power supply, characterized by, The high-voltage box and the low-voltage box are detachably connected, the high-voltage box comprises a plug access unit, a fuse, a first current regulating unit, a voltage regulating unit, a first filter unit and a magnetic field driving unit connected in sequence, and the low-voltage box comprises a magnetic field receiving unit, a second current regulating unit, a second filter unit, a voltage stabilizing output unit and a state indicating unit connected in sequence, wherein the plug access unit is used for receiving commercial power, the first current regulating unit is used for converting the commercial power into a DC voltage, and the DC voltage is processed by the voltage regulating unit, the first filter unit and the magnetic field driving unit to generate a magnetic field signal; the magnetic field receiving unit is used for receiving the magnetic field signal of the magnetic field driving unit and inductively outputting an alternating current signal, the second current regulating unit is used for processing the output alternating current signal to output a direct current, the second filter unit is used for filtering the direct current to obtain pure direct current, and the pure direct current is loaded to the voltage stabilizing output unit for voltage stabilization and sent to the state indicating unit.

2. The safety isolated power supply of claim 1, wherein, The high-voltage box comprises at least one circuit mode, and the low-voltage box comprises at least one circuit mode.

3. The safety isolated power supply of claim 2, wherein, The first circuit mode of the high-voltage box comprises a P1 plug, a fuse F1, a first branch and a second branch, the first branch comprises a full-bridge D3, a capacitor C3, a capacitor C4, a coil L1, a switch tube Q1, a resistor R10, a resistor R11, a diode D13, an integrated circuit U2, a resistor R7, a resistor R20, a capacitor C18, a diode D5, a P4 terminal and a diode D2, the P1 plug is used for receiving commercial power, the full-bridge D3 is used for rectifying the current output by the fuse F1, the capacitor C3 is used for storing energy and flattening the pulse gap, the resistor R10 is used for driving current limiting, the resistor R11 is used for shutting off compensation, the diode D13 is used for limiting high-voltage protection, the resistor R7 is used for current sampling output current signal, the resistor R20 and the capacitor C18 constitute RC low-pass regulation, the P4 terminal is used for connecting a cooling fan, and the diode D2 is used for preventing interference generated by the fan motor, wherein the P1 plug belongs to the plug access unit, the full-bridge D3, the switch tube Q1 and the resistor R10 belong to the first current regulating unit, the capacitor C4 belongs to the first filter unit, the diode D13 belongs to the voltage regulating unit, the coil L1 belongs to the magnetic field driving unit, the resistor R20 and the capacitor C18 belong to the first filter unit, and the coil L1 belongs to the magnetic field driving unit. The second branch includes capacitor C9, capacitor C10, resistor R13, resistor R14, full bridge D10, diode D11, diode D12, capacitor C13, capacitor C14, capacitor C15, capacitor C16, capacitor C17, resistor R17, resistor R18, resistor R19 and resistor R21, the capacitor C9, capacitor C10, resistor R13, resistor R14 constitute an RC current limiting circuit, the full bridge D10 is used for rectifying to obtain pulsating direct current, the diode D11, diode D12 are used for voltage reduction, the capacitor C13 is used for anti-interference filtering, the capacitor C14 is used for energy storage and flat pulse gap, the capacitor C15, capacitor C16, capacitor C17, resistor R17, resistor R18, resistor R19 and resistor R21 constitute the peripheral circuit of the integrated circuit U2, wherein the capacitor C9, capacitor C10, resistor R13, resistor R14 and the full bridge D10 belong to the first current regulation unit, the diode D11, diode D12 belong to the voltage regulation unit, and the capacitor C13 belongs to the first filter unit.

4. The safety-isolated power supply of claim 2, wherein, The second circuit mode of the high-voltage box includes a P10 plug, a fuse F4, a half bridge D21, a capacitor C31, a capacitor C32, a third branch and a fourth branch, the third branch includes a coil L10, a switch tube Q5, a resistor R34, a resistor R35, a diode D27, an integrated circuit U5, a resistor R33, a resistor R45, a capacitor C46, a diode D20, a P9 terminal and a diode D19, the P10 plug is used for receiving mains, the half bridge D21 is used for rectifying the current output by the fuse F4, the capacitor C31 is used for energy storage and flat pulse gap, the capacitor C32 is used for anti-interference filtering, the coil L10 is used for loading electromagnetic conversion, the switch tube Q5 and the resistor R34 are used for driving current limiting, the resistor R35 is used for shutdown compensation, the diode D27 is used for high voltage protection, the resistor R33 is used for current sampling and outputting a current signal, the resistor R45 and the capacitor C46 constitute an RC low-pass to regulate the current signal, the coil L10 is used for electromagnetic conversion, the diode D20, the P9 terminal is used for connecting a cooling fan, and the diode D19 is used for preventing interference generated by the fan motor, wherein the P10 plug belongs to the plug access unit, the half bridge D21, the switch tube Q5 and the resistor R34 belong to the first current regulation unit, the resistor R45 and the capacitor C46 belong to the first filter unit, the diode D27 belongs to the voltage regulation unit, and the coil L10 belongs to the magnetic field driving unit; The fourth branch includes voltage regulator chip VR1, diode D22, diode D24, capacitor C33, resistor R38, inductor L13, capacitor C38, resistor R40, capacitor C35, chip U12, inductor L11, diode D23, resistor R39, resistor R41, capacitor C34, capacitor C42, capacitor C41, integrated circuit U5, capacitor C44, capacitor C43, capacitor C45, resistor R42, resistor R43, resistor R44 and resistor R46, the voltage regulator chip VR1, diode D22, diode D24, capacitor C33, resistor R38, inductor L13, capacitor C38, resistor R40 constitute a switch voltage reduction circuit, the capacitor C35 and the capacitor C41 are used for anti-interference filter, the chip U12, inductor L11, diode D23, resistor R39, resistor R41, capacitor C34, capacitor C42 constitute a boost voltage regulator circuit, the capacitor C44, capacitor C43, capacitor C45, resistor R42, resistor R43, resistor R44 and resistor R46 are the peripheral circuit of the integrated circuit U5, wherein the switch voltage reduction circuit, the boost voltage regulator circuit belong to the voltage regulation unit, the capacitor C35 and the capacitor C41 belong to the first filter unit.

5. The safety-isolated power supply of claim 2, wherein, The third circuit mode of the high-voltage box includes a P2 plug, a fuse F2, a resistor R8, a capacitor C2, a full-bridge D4, a diode D6, a diode D7, a switch tube Q2, a switch tube Q3, a resistor R15, a resistor R16, a coil L2, a coil L3, a capacitor C5 and a capacitor C6, the P2 plug is used for accessing the mains, the resistor R8 and the capacitor C2 constitute an RC circuit for current limiting to obtain an AC voltage source, the full-bridge D4 is used for rectifying the AC voltage source to obtain a DC voltage source, the diode D6, the diode D7, the switch tube Q2, the switch tube Q3, the resistor R15, the resistor R16, the coil L2 and the coil L3 constitute a voltage reduction oscillation circuit, the coil L2 and the coil L3 cross to generate a magnetic field for driving the low-voltage box, and the capacitor C5 and the capacitor C6 are used for power supply filtering, wherein the P2 plug belongs to the plug access unit, the full-bridge D4, the resistor R8 and the capacitor C2 belong to the first current regulation unit, the voltage reduction oscillation circuit belongs to the voltage regulation unit, the coil L2 and the coil L3 belong to the magnetic field driving unit, and the capacitor C5 and the capacitor C6 belong to the first filter unit.

6. The safety-isolated power supply of claim 2, wherein, The fourth circuit mode of the high-voltage box comprises a P7 plug, a fuse F3, a resistor R22, a capacitor C29, a full-bridge D15, a switch tube Q4, a resistor R30, a resistor R31, a coil L7, a coil L6, a capacitor C23 and a capacitor C24, the P7 plug is used for accessing the mains, the resistor R22 and the capacitor C29 constitute an RC circuit for current limiting to obtain an AC voltage source, the full-bridge D15 is used for rectifying the AC voltage source to obtain a DC voltage source, the switch tube Q4, the resistor R30, the resistor R31, the coil L7 and the coil L6 constitute a step-down oscillation circuit, the coil L6 and the coil L7 cross to generate a magnetic field for driving the low-voltage box, and the capacitor C23 and the capacitor C24 are used for power supply filtering, wherein the P7 plug belongs to the plug access unit, the full-bridge D15, the resistor R22 and the capacitor C29 belong to the first current regulation unit, the step-down oscillation circuit belongs to the voltage regulation unit, the coil L6 and the coil L7 belong to the magnetic field driving unit, and the capacitor C23 and the capacitor C24 belong to the first filter unit.

7. The safety-isolated power supply of claim 2, wherein, The first circuit mode of the low-voltage box comprises a coil L5, a full-bridge D9, a capacitor C11, a capacitor C12, a chip U1, a diode D8, a coil L4, a capacitor C7, a capacitor C8, a resistor R9, a resistor R4, a resistor R5, a P5 socket, a chip U25, a resistor R3, a capacitor C1, a resistor R1, a diode D1, a resistor R2 and an indicator lamp D32, the coil L5 is used for receiving a magnetic field and inducting an alternating current signal, the full-bridge D9 is used for rectifying the alternating current signal to output a pulsating direct current, the capacitor C11 is used for storing energy and pushing the pulsating gap, the capacitor C12 is used for anti-interference filtering to obtain pure direct current, the chip U1, the diode D8, the coil L4, the capacitor C7, the capacitor C8, the resistor R9, the resistor R4 and the resistor R5 constitute a voltage stabilizing circuit for stabilizing the pure direct current, the P5 socket is used for outputting the stabilized pure direct current to an electrical appliance, the P5 socket is used for communication coding according to the PD protocol of the electrical appliance, the chip U25, the resistor R3, the capacitor C1 and the resistor R1 constitute a PD protocol circuit and are used for decoding to obtain an output control signal, the voltage stabilizing circuit receives the output control signal and supplies power to the indicator lamp D32 through the resistor R2 to indicate the output state, wherein the coil L5 belongs to the magnetic field receiving unit, the full-bridge D9 belongs to the second current regulation unit, the voltage stabilizing circuit and the P5 socket belong to the voltage stabilizing output unit, the capacitor C12 belongs to the second filter unit, and the resistor R2 and the indicator lamp D32 belong to the state indicating unit.

8. The safety-isolated power supply of claim 2, wherein, The second circuit mode of the low-voltage box comprises a coil L9 for receiving a magnetic field and inducting an alternating current signal, a diode D16, a diode D18, a capacitor C20, a capacitor C21, a capacitor C27, a capacitor C28, a capacitor C29, a capacitor C30, a chip U3, a diode D17, a coil L8, a capacitor C25, a capacitor C26, a resistor R25, a resistor R26, a resistor R27, a P8 socket, a chip U6, a resistor R24, a capacitor C19, a resistor R22, a diode D14, a resistor R23 and an indicator lamp D28, the diode D16, the diode D18, the capacitor C20, the capacitor C21, the capacitor C27 and the capacitor C28 constitute a voltage boosting circuit and process the alternating current signal to obtain a direct current signal, the capacitor C29 and the capacitor C30 filter the direct current signal to obtain pure direct current, the chip U3, the diode D17, the coil L8, the capacitor C25, the capacitor C26, the resistor R25, the resistor R26 and the resistor R27 constitute a voltage stabilizing circuit and stabilize the pure direct current, the P8 socket is used for outputting the stabilized pure direct current to an electrical appliance, the P8 socket is also used for communication coding according to the PD protocol of the electrical appliance, the chip U6, the resistor R24, the capacitor C19 and the resistor R22 constitute a PD protocol circuit and are used for decoding to obtain an output control signal, the voltage stabilizing circuit receives an output direct current signal through the diode D14 and supplies power to the indicator lamp D28 through the resistor R23 to indicate the output state, wherein the coil L9 belongs to a magnetic field receiving unit, the voltage boosting circuit, the voltage stabilizing circuit and the P8 socket belong to the voltage stabilizing output unit, the capacitor C29 and the capacitor C30 belong to the second filtering unit, and the resistor R23 and the indicator lamp D28 belong to the state indicating unit.

9. The safety-isolated power supply of claim 2, wherein, The third circuit mode of the low-voltage box comprises a coil L14 for receiving a magnetic field and inducting an alternating current signal, a diode D26, a capacitor C39, a capacitor C40, a chip U4, a diode D25, a coil L12, a capacitor C36, a capacitor C37, a P11 socket, a resistor R37 and an indicator lamp D36, the diode D26 rectifies the alternating current signal and sends it to the capacitor C39, the capacitor C39 is used for storing energy and pushing the pulsating gap to obtain a direct current signal, the capacitor C40 is used for anti-interference filtering of the direct current signal to obtain pure direct current, the chip U4, the diode D25, the coil L12, the capacitor C36 and the capacitor C37 constitute a voltage stabilizing circuit and stabilize the pure direct current, the P11 socket is used for outputting the stabilized pure direct current and supplying power to the indicator lamp D36 through the capacitor C37 to indicate the output state, wherein the coil L14 belongs to a magnetic field receiving unit, the diode D26 belongs to a second current regulating output unit, the voltage stabilizing circuit and the P11 socket belong to a voltage stabilizing output unit, the capacitor C40 belongs to a second filtering unit, and the capacitor C37 and the indicator lamp D36 belong to a state indicating unit.

10. The safety-isolated power supply of claim 1, wherein, The high-pressure box and the low-pressure box are connected by ABS concave-convex fasteners and magnetic attraction.

Images