Power supply control device and power supply system

Abstract

The utility model provides a kind of power supply control device and power supply system, power supply control device includes power supply circuit, control circuit and detection circuit;Power supply circuit is used to access power supply and is used to be electrically connected with outgoing switch device, detection circuit is used to detect the assembly state of outgoing switch device and exports corresponding assembly signal;Control circuit is electrically connected with power supply circuit and detection circuit respectively, for according to the assembly signal of access, the output state of control power supply circuit.It is detected that detection circuit and control circuit are set respectively, and the assembly state of outgoing switch device can be detected and corresponding assembly signal is exported to control circuit, so that control circuit can control the output state of power supply circuit according to assembly signal, for example, when the assembly of outgoing switch device has problem, the output of power supply circuit is interrupted, finally, energy waste is avoided.

Description

Technical Field

[0001] This utility model relates to the field of electrical protection technology, specifically to a power supply control device and power supply system. Background Technology

[0002] In some power supply scenarios, the power circuit outputs electrical energy through corresponding outgoing switch devices. These outgoing switch devices can be turned on or off under certain control conditions, thereby controlling the output of electrical energy. Outgoing switch devices typically require reliable assembly and are connected in series between the power circuit and the downstream electrical load.

[0003] When there is a problem with the assembly of the outgoing line switch device, the power supply circuit will continue to output electrical energy. This will cause the outgoing line switch device to be unable to control the output of electrical energy, and the electrical energy output by the power supply circuit will also be unable to be transmitted to the electrical load, ultimately resulting in the waste of electrical energy. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the present invention provides a power supply control device and a power supply system.

[0005] In one embodiment, the present invention provides a power supply control device, which includes a power supply circuit, a control circuit, and a detection circuit.

[0006] The power supply circuit is used to connect to the power supply and to be electrically connected to the outgoing line switch device. The detection circuit is used to detect the assembly status of the outgoing line switch device and output the corresponding assembly signal.

[0007] The control circuit is electrically connected to both the power supply circuit and the detection circuit, and is used to control the output state of the power supply circuit according to the incoming assembly signal.

[0008] In one embodiment, the power supply circuit includes a first power supply unit and a second power supply unit, the detection circuit includes a first detection unit and a second detection unit, and the outgoing line switch device includes a first outgoing line switch and a second outgoing line switch.

[0009] The first power supply unit is used to connect to the power supply and to be electrically connected to the first outgoing switch. The second power supply unit is used to connect to the power supply and to be electrically connected to the second outgoing switch. The first detection unit is used to detect the first assembly state of the first outgoing switch and output the corresponding first assembly signal. The second detection unit is used to detect the second assembly state of the second outgoing switch and output the corresponding second assembly signal.

[0010] The control circuit is electrically connected to the first power supply unit, the second power supply unit, the first detection unit, and the second detection unit, respectively, and is used to control the output state of the first power supply unit and the second power supply unit according to the first assembly signal and the second assembly signal received.

[0011] In one embodiment, the control circuit includes a power management unit and a main control unit electrically connected to the power management unit;

[0012] The main control unit is also electrically connected to the first detection unit and the second detection unit respectively, and is used to output corresponding control signals to the power management unit according to the first assembly signal and the second assembly signal;

[0013] The power management unit is also electrically connected to the first power supply unit and the second power supply unit respectively, and is used to control the output state of the first power supply unit and the second power supply unit according to the control signal.

[0014] In one embodiment, the power supply circuit includes a primary-side processing subunit, a transformer, a first secondary-side processing subunit, and a second secondary-side processing subunit. The transformer includes a primary winding, a first secondary winding, and a second secondary winding. The primary-side processing subunit, the primary winding, the first secondary winding, and the first secondary-side processing subunit constitute a first power supply unit. The primary-side processing subunit, the primary winding, the second secondary winding, and the second secondary-side processing subunit constitute a second power supply unit.

[0015] The input terminal of the primary-side processing subunit is used to connect to the power supply. The first output terminal of the primary-side processing subunit is electrically connected to the input terminal of the primary winding. The second output terminal of the primary-side processing subunit is used to ground. The output terminal of the primary winding is used to ground through the power management unit.

[0016] The first secondary winding is electrically connected to the input terminal of the first secondary processing subunit, the first output terminal of the first secondary processing subunit is used to be electrically connected to the first outgoing switch, and the second output terminal of the first secondary processing subunit is used to be grounded.

[0017] The second secondary winding is electrically connected to the input terminal of the second secondary processing subunit. The first output terminal of the second secondary processing subunit is used to be electrically connected to the second outgoing switch, and the second output terminal of the second secondary processing subunit is used to be grounded.

[0018] In one embodiment, the power supply circuit further includes a third secondary processing subunit, and the transformer further includes a third secondary winding;

[0019] The third secondary winding is electrically connected to the input terminal of the third secondary processing subunit, the first output terminal of the third secondary processing subunit is electrically connected to the power supply terminal of the power management unit, and the second output terminal of the third secondary processing subunit is used for grounding.

[0020] In one embodiment, the second output terminal of the primary-side processing subunit, the ground terminal of the power management unit, and the second output terminal of the third secondary-side processing subunit are respectively used to be electrically connected to the first ground terminal, the second output terminal of the first secondary-side processing subunit is used to be electrically connected to the second ground terminal, and the second output terminal of the second secondary-side processing subunit is used to be electrically connected to the third ground terminal.

[0021] In one embodiment, the power supply circuit further includes an overvoltage feedback unit;

[0022] The output terminal of the overvoltage feedback unit is electrically connected to the feedback terminal of the power management unit;

[0023] The input terminal of the overvoltage feedback unit is electrically connected to the first output terminal of the first secondary-side processing subunit, and is used to output a corresponding overvoltage feedback signal to the power management unit according to the output state of the first secondary-side processing subunit; and / or, the input terminal of the overvoltage feedback unit is electrically connected to the first output terminal of the second secondary-side processing subunit, and is used to output a corresponding overvoltage feedback signal to the power management unit according to the output state of the second secondary-side processing subunit.

[0024] In one embodiment, the overvoltage feedback unit includes an optocoupler, a reference source, a first voltage divider resistor, and a second voltage divider resistor. The optocoupler includes a light-emitting diode and a phototransistor.

[0025] The anode of the light-emitting diode is electrically connected to the first output terminal of the first secondary processing subunit and / or the first output terminal of the second secondary processing subunit, the cathode of the light-emitting diode is electrically connected to the cathode of the reference source, and the anode of the reference source is used for grounding.

[0026] The first end of the first voltage divider resistor is electrically connected to the anode of the light-emitting diode, the second end of the first voltage divider resistor is electrically connected to the first end of the second voltage divider resistor and the reference electrode of the reference source, and the second end of the second voltage divider resistor is electrically connected to the anode of the reference source.

[0027] The collector of the phototransistor is electrically connected to the feedback terminal of the power management unit, and the emitter of the phototransistor is used for grounding.

[0028] In one embodiment, the first detection unit includes a first micro switch, and the second detection unit includes a second micro switch;

[0029] The first input terminal of the first micro switch and the first input terminal of the second micro switch are respectively used to connect to the working voltage. The second input terminal of the first micro switch is electrically connected to the first acquisition terminal of the main control unit, and the second input terminal of the second micro switch is electrically connected to the second acquisition terminal of the main control unit.

[0030] The first micro switch is used to mechanically connect with the first outgoing switch and to turn on or off according to the first assembly state of the first outgoing switch;

[0031] The second micro switch is mechanically connected to the second outgoing switch and is used to turn on or off according to the second assembly state of the second outgoing switch.

[0032] Secondly, in one embodiment, the present invention provides a power supply system, which includes a power supply, an outgoing switch device, and a power supply control device as described in any of the above embodiments.

[0033] The aforementioned power supply control device and power supply system are equipped with control circuits and detection circuits. The detection circuit can detect the assembly status of the outgoing line switch device and output a corresponding assembly signal to the control circuit. This allows the control circuit to control the output status of the power supply circuit based on the assembly signal. For example, if there is a problem with the assembly of the outgoing line switch device, the output of the power supply circuit can be interrupted, thus avoiding energy waste. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of a power supply system including a power supply control device in one embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of a power supply control device using dual-channel power supply in one embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of a control circuit including a power management unit and a main control unit in one embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of the power supply control device in one embodiment of the present invention;

[0039] Figure 5 This is a schematic diagram illustrating grounding isolation in one embodiment of the present invention;

[0040] Figure 6 This is a partial circuit diagram of the overvoltage feedback unit in one embodiment of the present invention;

[0041] Figure 7 This is a schematic diagram of the detection unit and the main control unit in one embodiment of the present invention;

[0042] Figure 8 This is a circuit diagram of a method for step-down processing of the output of the first secondary processing subunit in one embodiment of the present invention;

[0043] Figure 9This is a circuit diagram of a method for stepping down the output of the second secondary processing subunit in one embodiment of the present invention. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0045] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified. In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use this invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of this invention with unnecessary detail. Therefore, this invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0046] Firstly, such as Figure 1 As shown, in one embodiment, the present invention provides a power supply control device, which includes a power supply circuit, a control circuit, and a detection circuit.

[0047] The power supply circuit is used to connect to the power supply and to be electrically connected to the downstream electrical load through the outgoing switch device.

[0048] The power supply circuit mainly performs power processing, thereby converting the power supply into the required target power, and then supplying power to the electrical load through the outgoing switch device.

[0049] Among them, outgoing line switching devices can be manually shut off by operators or automatically shut off under the control of the corresponding controller in the event of certain faults, so as to achieve the purpose of fault protection. Outgoing line switching devices include, but are not limited to, circuit breakers.

[0050] The detection circuit is used to detect the assembly status of the outgoing line switch device and output the corresponding assembly signal.

[0051] The detection circuit can be mechanically connected, electrically connected, or non-contactly connected to the outgoing switch device, depending on its specific type.

[0052] Specifically, taking a non-contact method as an example, the detection circuit can be a vision detection circuit, which can detect the assembly gap of the outgoing line switch device through visual inspection. If the assembly gap is too large, it is determined that there is a problem with the assembly state of the outgoing line switch device and an assembly signal indicating that there is a problem is output; if the assembly gap is not too large, it is determined that there is no problem with the assembly state of the outgoing line switch device and an assembly signal indicating that there is no problem is output.

[0053] The control circuit is electrically connected to both the power supply circuit and the detection circuit, and is used to control the output state of the power supply circuit according to the incoming assembly signal.

[0054] The control circuit acquires the assembly signal output by the detection circuit to determine if there are any problems with the assembly status of the outgoing line switch device. If a problem is found, the control circuit disconnects the power supply circuit to prevent continuous power output; if no problem is found, the control circuit turns the power supply circuit on to ensure normal power supply.

[0055] The aforementioned power supply control device includes a control circuit and a detection circuit. The detection circuit can detect the assembly status of the outgoing line switch device and output a corresponding assembly signal to the control circuit. This allows the control circuit to control the output status of the power supply circuit based on the assembly signal. For example, if there is a problem with the assembly of the outgoing line switch device, the output of the power supply circuit can be interrupted, ultimately avoiding energy waste.

[0056] like Figure 2 As shown, in one embodiment, the power supply circuit includes a first power supply unit and a second power supply unit, the detection circuit includes a first detection unit and a second detection unit, and the outgoing line switch device includes a first outgoing line switch and a second outgoing line switch.

[0057] When the outgoing line switch device is specifically a circuit breaker, on the one hand, the first outgoing line switch and the second outgoing line switch can be two independent circuit breakers; on the other hand, the first outgoing line switch and the second outgoing line switch can also be two actuators in the same circuit breaker, such as two trip units.

[0058] The first power supply unit is used to connect to the power supply and to be electrically connected to the electrical load through the first outgoing switch. The second power supply unit is used to connect to the power supply and to be electrically connected to the electrical load through the second outgoing switch.

[0059] In this embodiment, a dual-channel power supply is used, with the first power supply unit and the second power supply unit each outputting two power sources, which are simultaneously supplied to a single electrical load. In other embodiments, the two power sources may also be supplied to different electrical loads, which will not be elaborated further here.

[0060] The first detection unit is used to detect the first assembly state of the first outgoing switch and output the corresponding first assembly signal, and the second detection unit is used to detect the second assembly state of the second outgoing switch and output the corresponding second assembly signal.

[0061] The first outgoing switch and the second outgoing switch can be two independent switches, that is, there is no connection between the first outgoing switch and the second outgoing switch. The first assembly position corresponding to the first outgoing switch and the second assembly position corresponding to the second outgoing switch are also independent of each other. In this case, a first detection unit and a second detection unit need to be set up respectively to detect the first assembly state of the first outgoing switch and the second assembly state of the second outgoing switch.

[0062] In other embodiments, the first and second outgoing switches can also be two switches with a synchronous relationship. That is, the first and second outgoing switches are fixedly connected by other connectors. When the first outgoing switch is assembled to its corresponding first assembly position and the corresponding first assembly state is problem-free, the second outgoing switch is usually also synchronously assembled to its corresponding second assembly position and the corresponding second assembly state is problem-free. In this scenario, only one detection unit is needed, namely either the first detection unit or the second detection unit. When both the first and second detection units are set, redundancy can be achieved to improve detection accuracy.

[0063] The control circuit is electrically connected to the first power supply unit, the second power supply unit, the first detection unit, and the second detection unit, respectively, and is used to control the output state of the first power supply unit and the second power supply unit according to the first assembly signal and the second assembly signal received.

[0064] In one aspect, the control circuit determines the first assembly state of the first outgoing switch based on the first assembly signal, thereby controlling the first power supply unit to be turned off or on. On the other hand, the control circuit also determines the second assembly state of the second outgoing switch based on the second assembly signal, thereby controlling the second power supply unit to be turned off or on.

[0065] Depending on the specific topology of the first and second power supply units, the control circuit can simultaneously control the first and second power supply units to disconnect or connect. For example, if the first and second power supply units have the same front-end topology, the control circuit can directly control the connection and disconnection of that front-end topology. In other words, when there is a problem with the first assembly state of the first outgoing switch, the control circuit will control both the first and second power supply units to disconnect simultaneously, regardless of the second assembly state of the second outgoing switch. Similarly, when there is a problem with the second assembly state of the second outgoing switch, the control circuit will control both the first and second power supply units to disconnect simultaneously, regardless of the first assembly state of the first outgoing switch.

[0066] In other embodiments, the first power supply unit and the second power supply unit can also be controlled to be disconnected or connected separately. That is, when there is a problem with the first assembly state of the first outgoing switch but not with the second assembly state of the second outgoing switch, the control circuit can control the first power supply unit to be disconnected but control the second power supply unit to be connected. Similarly, when there is a problem with the second assembly state of the second outgoing switch but not with the first assembly state of the first outgoing switch, the control circuit can control the second power supply unit to be disconnected but control the first power supply unit to be connected. By controlling them separately, the purpose of selectively selecting the output of the first power supply unit and the second power supply unit can be achieved.

[0067] like Figure 3 As shown, in one embodiment, the control circuit includes a power management unit and a main control unit electrically connected to the power management unit.

[0068] The main control unit is also electrically connected to the first detection unit and the second detection unit, respectively, and is used to output corresponding control signals to the power management unit according to the first assembly signal and the second assembly signal.

[0069] The main control unit can be a main control chip, such as an MCU. The main control unit processes assembly signals. When the assembly signal indicates a problem with the assembly state, it outputs a control signal indicating disconnection; when the assembly signal indicates no problem with the assembly state, it outputs a control signal indicating connection.

[0070] The main control unit can output a first control signal and a second control signal to the power management unit based on the first assembly signal and the second assembly signal, respectively. Each control signal represents one of two single logic operations: disconnection or conduction. Alternatively, in other embodiments, the main control unit can output a single control signal to the power management unit based on the first assembly signal and the second assembly signal. This control signal can represent four combined logic operations: disconnection or conduction of the first power unit and disconnection or conduction of the second power unit.

[0071] The power management unit is also electrically connected to the first power supply unit and the second power supply unit respectively, and is used to control the output state of the first power supply unit and the second power supply unit according to the control signal.

[0072] The power management unit (PMU) can be a power management chip, such as a switching power supply chip. The PMU is primarily used to drive the power supply unit and is controlled by the main control unit. When the main control unit outputs a control signal indicating disconnection, the PMU controls the power supply unit to disconnect; when the main control unit outputs a control signal indicating conduction, the PMU controls the power supply unit to conduct.

[0073] The power management unit can control the first power unit and the second power unit simultaneously, or control the first power unit and the second power unit separately, based on the control signal output by the main control unit. For details, please refer to the above embodiments, which will not be repeated here.

[0074] like Figure 4 As shown, in one embodiment, the power supply circuit includes a primary-side processing subunit consisting of a fuse FR2, a varistor RV1, a capacitor CX2, a resistor R4, a resistor R8, a common-mode inductor LF1, a rectifier bridge BD2, a capacitor EC2, a resistor R6, a resistor R7, a resistor R11, a resistor R13, a capacitor C5, and a freewheeling diode D4; a transformer consisting of a first transformer assembly T1A and a second transformer assembly T2A of the same core; a first secondary-side processing subunit consisting of a diode D3, a capacitor C6, a resistor R3, a capacitor EC3, a capacitor C7, and a resistor R9; and a second secondary-side processing subunit consisting of a diode D5, a capacitor C9, a resistor R14, a capacitor EC4, a capacitor C10, and a resistor R20. The power management unit includes a switching power supply chip UZ1.

[0075] The transformer includes a primary winding (windings corresponding to pins 1 and 3) and a first secondary winding (windings corresponding to pins 9 and 10) belonging to the first transformer assembly T1A, and a second secondary winding (windings corresponding to pins 6 and 7) belonging to the second transformer assembly T2A.

[0076] The primary-side processing subunit, the primary-side winding, the first secondary-side winding, and the first secondary-side processing subunit constitute the first power supply unit, while the primary-side processing subunit, the primary-side winding, the second secondary-side winding, and the second secondary-side processing subunit constitute the second power supply unit.

[0077] The specific connection relationships are as follows:

[0078] The first end of fuse FR2 serves as the first input terminal of the primary-side processing subunit and is electrically connected to the live wire L of the power supply. The second end of varistor RV1 serves as the second input terminal of the primary-side processing subunit and is electrically connected to the neutral wire N of the power supply. The first end of capacitor C5 serves as the first output terminal of the primary-side processing subunit and is electrically connected to the input terminal (pin 1) of the primary winding. The second end of capacitor EC2 serves as the second output terminal of the primary-side processing subunit and is grounded. The output terminal (pin 2) of the primary winding is grounded through the switching power supply chip UZ1.

[0079] The output terminal (pin 10) of the first secondary winding is electrically connected to the anode of diode D3, which serves as the first input terminal of the first secondary processing subunit. The input terminal (pin 9) of the first secondary winding is electrically connected to the second terminal of capacitor EC3, which serves as the second input terminal of the first secondary processing subunit. The first terminal of resistor R9 serves as the first output terminal of the first secondary processing subunit and is used to connect to the first outgoing switch to output the first 18V / 1A power. The second terminal of resistor R9 serves as the second output terminal of the first secondary processing subunit and is used to ground.

[0080] The output terminal (pin 7) of the second secondary winding is electrically connected to the anode of diode D5, which serves as the input terminal of the second secondary processing subunit. The input terminal (pin 6) of the second secondary winding is electrically connected to the second terminal of capacitor EC4, which serves as the second input terminal of the second secondary processing subunit. The first terminal of resistor R20 serves as the first output terminal of the second secondary processing subunit and is used to connect to the second outgoing switch to output the second 18V / 1A power. The second terminal of resistor R20 serves as the second output terminal of the second secondary processing subunit and is used for grounding.

[0081] In this embodiment, the switching power supply chip UZ1 controls the on / off state between its pins 6 and 7 and pin 3 based on the control signal BR connected to its pin 2, thereby controlling the on / off state of the circuit containing the primary winding, and consequently controlling the output states of the first and second secondary processing subunits. Specifically, when the circuit containing the primary winding remains open, neither the first 18V / 1A nor the second 18V / 1A outputs can be output; when the circuit containing the primary winding is normally on / off, both the first and second 18V / 1A outputs can be output.

[0082] like Figure 4As shown, in one embodiment, the power supply circuit further includes a third secondary processing subunit consisting of diode D6, resistor R18, capacitor C11 and capacitor EC5, and the transformer further includes a third secondary winding (windings corresponding to pins 4 and 5) belonging to the second transformer assembly T2A.

[0083] The output terminal (pin 5) of the third secondary winding is electrically connected to the anode of diode D6, which serves as the first input terminal of the third secondary processing subunit. The second terminal of capacitor C11 serves as the second input terminal of the third secondary processing subunit and is electrically connected to the input terminal (pin 4) of the third secondary winding. The first terminal of capacitor EC5, which serves as the first output terminal of the third secondary processing subunit, is electrically connected to the power supply terminal (pin 5) of the switching power supply chip UZ1. The second terminal of capacitor EC5, which serves as the second output terminal of the third secondary processing subunit, is grounded.

[0084] When the system is powered on, the primary winding can store energy, and then use electromagnetic induction to transfer energy to the first secondary winding, the second secondary winding, and the third secondary winding. The third secondary winding supplies power to the switching power supply chip UZ1 through the third secondary processing subunit, so that the switching power supply chip UZ1 is powered on and can control the on and off of the primary winding.

[0085] like Figure 4 As shown, in one embodiment, the second terminal of capacitor EC2, which is the second output terminal of the primary-side processing subunit, the ground terminal (pin 3) of the switching power supply chip UZ1, and the second terminal of capacitor EC5, which is the second output terminal of the third secondary-side processing subunit, are respectively used to be electrically connected to the first ground terminal GND. The second terminal of resistor R9, which is the second output terminal of the first secondary-side processing subunit, is used to be electrically connected to the second ground terminal SGND1. The second terminal of resistor R20, which is the second output terminal of the second secondary-side processing subunit, is used to be electrically connected to the third ground terminal SGND2.

[0086] In this embodiment, a transformer is used to achieve physical isolation between high voltage and low voltage levels, and different grounding is used for the primary and secondary sides to improve the isolation effect.

[0087] Among them, reference Figure 5 The first ground terminal GND and the second ground terminal SGND1 are electrically connected through capacitors CY1 and CY2 connected in series. The first ground terminal GND and the third ground terminal SGND2 are electrically connected through capacitors CY3 and CY4 connected in series. Since both the primary and secondary sides are rectified DC circuits, the method of connecting them through capacitors can achieve the purpose of isolation.

[0088] In one embodiment, the power supply circuit further includes an overvoltage feedback unit.

[0089] The output terminal of the overvoltage feedback unit is electrically connected to the feedback terminal of the power management unit;

[0090] The input terminal of the overvoltage feedback unit is electrically connected to the first output terminal of the first secondary-side processing subunit, and is used to output a corresponding overvoltage feedback signal to the power management unit according to the output state of the first secondary-side processing subunit; and / or, the input terminal of the overvoltage feedback unit is electrically connected to the first output terminal of the second secondary-side processing subunit, and is used to output a corresponding overvoltage feedback signal to the power management unit according to the output state of the second secondary-side processing subunit.

[0091] The overvoltage feedback unit can detect the output status of at least one of the first secondary side processing subunit and the second secondary side processing subunit, and feed back an overvoltage feedback signal representing the overvoltage to the power management unit when an overvoltage occurs.

[0092] like Figure 4 and Figure 6 As shown, in one embodiment, the overvoltage feedback unit includes an optocoupler, a reference source IC2, a first voltage divider resistor consisting of resistors R22 and R26 connected in series, and a second voltage divider resistor consisting of resistor R27. The optocoupler includes a light-emitting diode U1A and a phototransistor U1B.

[0093] The anode of LED U1A is electrically connected to the first terminal of resistor R20, which serves as the first output terminal of the second secondary processing subunit, to receive the second 18V / 1A power. The cathode of LED U1A is electrically connected to the cathode of reference source IC2, and the anode of reference source IC2 is used for grounding.

[0094] The first end of resistor R22 is electrically connected to the anode of LED U1A. The second end of resistor R22 is electrically connected to the first end of resistor R26. The second end of resistor R26 is electrically connected to the first end of resistor R27 and the reference electrode of reference source IC2. The second end of resistor R27 is electrically connected to the anode of reference source IC2.

[0095] The collector of the phototransistor U1B is electrically connected to the feedback terminal (pin 4) of the switching power supply chip UZ1, and the emitter of the phototransistor U1B is used for grounding.

[0096] When an overvoltage occurs in the second 18V / 1A circuit, the voltage across resistor R27 exceeds the reference voltage of reference source IC2, causing reference source IC2 to conduct. At this time, LED U1A emits light, and phototransistor U1B conducts, ultimately inputting a low level to the feedback terminal of switching power supply chip UZ1.

[0097] Similar to the above embodiments, this embodiment can also improve the isolation effect through grounding isolation. Specifically, the anode of the reference source IC2 is electrically connected to the third ground terminal SGND2, and the emitter of the phototransistor U1B is electrically connected to the first ground terminal GND.

[0098] In this embodiment, the overvoltage feedback unit is only used to detect whether the second 18V / 1A channel of the second secondary-side processing subunit is overvoltage. In other embodiments, the same method can be used to detect whether the first 18V / 1A channel is overvoltage for the first secondary-side processing subunit, which will not be described in detail here.

[0099] like Figure 7 As shown, in one embodiment, the first detection unit includes a first micro switch S1, and the second detection unit includes a second micro switch S2.

[0100] The first input terminal of the first micro switch S1 and the first input terminal of the second micro switch S2 are respectively used to connect the working voltage (such as +3V3 working voltage). The second input terminal of the first micro switch S1 is electrically connected to the first acquisition terminal (pin 5) of the main control chip U4, and the second input terminal of the second micro switch S2 is electrically connected to the second acquisition terminal (pin 6) of the main control chip U4.

[0101] The first micro switch S1 is mechanically connected to the first outgoing switch (not shown in the figure) and is used to turn on or off according to the first assembly state of the first outgoing switch.

[0102] Specifically, when there is a problem with the first assembly state of the first outgoing switch, the first micro switch S1 is turned on by the first outgoing switch, thereby outputting a high-level first assembly signal DIANYUAN1 to the main control chip U4; when there is no problem with the first assembly state of the first outgoing switch, the first micro switch S1 is turned off by the first outgoing switch, thereby outputting a high-impedance first assembly signal DIANYUAN1 to the main control chip U4.

[0103] Alternatively, when there is a problem with the first assembly state of the first outgoing switch, the first micro switch S1 is opened under the action of the first outgoing switch, thereby outputting a high-impedance first assembly signal DIANYUAN1 to the main control chip U4; when there is no problem with the first assembly state of the first outgoing switch, the first micro switch S1 is turned on under the action of the first outgoing switch, thereby outputting a high-level first assembly signal DIANYUAN1 to the main control chip U4.

[0104] The second micro switch S2 is used for mechanical connection with the second outgoing switch (not shown in the figure) and for turning on or off according to the second assembly state of the second outgoing switch.

[0105] Specifically, when there is a problem with the second assembly state of the second outgoing switch, the second micro switch S2 is turned on by the second outgoing switch, thereby outputting a high-level second assembly signal DIANYUAN1 to the main control chip U4; when there is no problem with the second assembly state of the second outgoing switch, the second micro switch S2 is turned off by the second outgoing switch, thereby outputting a high-impedance second assembly signal DIANYUAN1 to the main control chip U4.

[0106] Alternatively, when there is a problem with the second assembly state of the second outgoing switch, the second micro switch S2 is opened under the action of the second outgoing switch, thereby outputting a high-impedance second assembly signal DIANYUAN1 to the main control chip U4; when there is no problem with the second assembly state of the second outgoing switch, the second micro switch S2 is turned on under the action of the second outgoing switch, thereby outputting a high-level second assembly signal DIANYUAN1 to the main control chip U4.

[0107] like Figure 8 As shown, the first power supply unit also includes capacitor C3, capacitor C4, power conversion chip U2, capacitor C1, and capacitor C2. Through the step-down processing of power conversion chip U2, the first 18V / 1A input can be converted into a +3V3 operating voltage.

[0108] Similarly, such as Figure 9 As shown, the second power supply unit also includes capacitors C14 and C15, power conversion chip U3, capacitors C16 and C17. Through the step-down processing of power conversion chip U3, the input second 18V / 1A can be converted into a +3V3 operating voltage.

[0109] Secondly, such as Figure 1 As shown, in one embodiment, the present invention provides a power supply system, which includes a power supply, an outgoing switch device, and a power supply control device as described in any of the above embodiments.

[0110] The power supply control device included in the power supply system is equipped with a control circuit and a detection circuit. The detection circuit can detect the assembly status of the outgoing line switch device and output a corresponding assembly signal to the control circuit. This allows the control circuit to control the output status of the power supply circuit based on the assembly signal. For example, if there is a problem with the assembly of the outgoing line switch device, the output of the power supply circuit can be interrupted, thus avoiding energy waste.

[0111] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the detailed descriptions of other embodiments above, which will not be repeated here.

[0112] The above provides a detailed description of the power supply control device and power supply system provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

[0113] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A power supply control device characterized by comprising: The power supply control device includes a power supply circuit, a control circuit, and a detection circuit; The power supply circuit is used to connect to the power supply and to be electrically connected to the outgoing switch device; the detection circuit is used to detect the assembly status of the outgoing switch device and output the corresponding assembly signal. The control circuit is electrically connected to the power supply circuit and the detection circuit respectively, and is used to control the output state of the power supply circuit according to the incoming assembly signal.

2. The power supply control device according to claim 1, characterized in that, The power supply circuit includes a first power supply unit and a second power supply unit; the detection circuit includes a first detection unit and a second detection unit; and the outgoing line switch device includes a first outgoing line switch and a second outgoing line switch. The first power supply unit is used to connect to the power supply and to be electrically connected to the first outgoing switch; the second power supply unit is used to connect to the power supply and to be electrically connected to the second outgoing switch; the first detection unit is used to detect the first assembly state of the first outgoing switch and output the corresponding first assembly signal; the second detection unit is used to detect the second assembly state of the second outgoing switch and output the corresponding second assembly signal. The control circuit is electrically connected to the first power supply unit, the second power supply unit, the first detection unit, and the second detection unit, respectively, and is used to control the output state of the first power supply unit and the second power supply unit according to the first assembly signal and the second assembly signal received.

3. The power supply control device according to claim 2, characterized in that, The control circuit includes a power management unit and a main control unit electrically connected to the power management unit; The main control unit is also electrically connected to the first detection unit and the second detection unit respectively, and is used to output corresponding control signals to the power management unit according to the first assembly signal and the second assembly signal; The power management unit is also electrically connected to the first power unit and the second power unit respectively, and is used to control the output state of the first power unit and the second power unit according to the control signal.

4. The power supply control device according to claim 3, characterized in that, The power supply circuit includes a primary-side processing subunit, a transformer, a first secondary-side processing subunit, and a second secondary-side processing subunit. The transformer includes a primary winding, a first secondary winding, and a second secondary winding. The primary-side processing subunit, the primary winding, the first secondary winding, and the first secondary-side processing subunit constitute the first power supply unit. The primary-side processing subunit, the primary winding, the second secondary winding, and the second secondary-side processing subunit constitute the second power supply unit. The input terminal of the primary-side processing subunit is used to connect to the power supply, the first output terminal of the primary-side processing subunit is electrically connected to the input terminal of the primary-side winding, the second output terminal of the primary-side processing subunit is used to ground, and the output terminal of the primary-side winding is used to ground through the power management unit. The first secondary winding is electrically connected to the input terminal of the first secondary processing subunit, the first output terminal of the first secondary processing subunit is used to be electrically connected to the first outgoing switch, and the second output terminal of the first secondary processing subunit is used to be grounded. The second secondary winding is electrically connected to the input terminal of the second secondary processing subunit, the first output terminal of the second secondary processing subunit is used to be electrically connected to the second outgoing switch, and the second output terminal of the second secondary processing subunit is used to be grounded.

5. The power supply control device according to claim 4, characterized in that, The power supply circuit also includes a third secondary processing subunit, and the transformer also includes a third secondary winding; The third secondary winding is electrically connected to the input terminal of the third secondary processing subunit, the first output terminal of the third secondary processing subunit is electrically connected to the power supply terminal of the power management unit, and the second output terminal of the third secondary processing subunit is used for grounding.

6. The power supply control device according to claim 5, characterized in that, The second output terminal of the primary-side processing subunit, the ground terminal of the power management unit, and the second output terminal of the third secondary-side processing subunit are respectively used to be electrically connected to the first ground terminal. The second output terminal of the first secondary-side processing subunit is used to be electrically connected to the second ground terminal, and the second output terminal of the second secondary-side processing subunit is used to be electrically connected to the third ground terminal.

7. The power supply control device according to claim 4, characterized in that, The power supply circuit also includes an overvoltage feedback unit; The output terminal of the overvoltage feedback unit is electrically connected to the feedback terminal of the power management unit; The input terminal of the overvoltage feedback unit is electrically connected to the first output terminal of the first secondary-side processing subunit, and is used to output a corresponding overvoltage feedback signal to the power management unit according to the output state of the first secondary-side processing subunit; and / or, the input terminal of the overvoltage feedback unit is electrically connected to the first output terminal of the second secondary-side processing subunit, and is used to output a corresponding overvoltage feedback signal to the power management unit according to the output state of the second secondary-side processing subunit.

8. The power supply control device according to claim 7, characterized in that, The overvoltage feedback unit includes an optocoupler, a reference source, a first voltage divider resistor, and a second voltage divider resistor. The optocoupler includes a light-emitting diode and a phototransistor. The anode of the light-emitting diode is electrically connected to the first output terminal of the first secondary processing subunit and / or the first output terminal of the second secondary processing subunit, the cathode of the light-emitting diode is electrically connected to the cathode of the reference source, and the anode of the reference source is used for grounding; The first end of the first voltage divider resistor is electrically connected to the anode of the light-emitting diode, the second end of the first voltage divider resistor is electrically connected to the first end of the second voltage divider resistor and the reference electrode of the reference source, and the second end of the second voltage divider resistor is electrically connected to the anode of the reference source. The collector of the phototransistor is electrically connected to the feedback terminal of the power management unit, and the emitter of the phototransistor is used for grounding.

9. The power supply control device according to claim 3, characterized in that, The first detection unit includes a first micro switch, and the second detection unit includes a second micro switch; The first input terminal of the first micro switch and the first input terminal of the second micro switch are respectively used to connect to the working voltage. The second input terminal of the first micro switch is electrically connected to the first acquisition terminal of the main control unit, and the second input terminal of the second micro switch is electrically connected to the second acquisition terminal of the main control unit. The first micro switch is used to mechanically connect with the first outgoing switch and to turn on or off according to the first assembly state of the first outgoing switch; The second micro switch is used for mechanical connection with the second outgoing switch and for turning on or off according to the second assembly state of the second outgoing switch.

10. A power supply system, characterized in that, The power supply system includes a power supply, an outgoing switch device, and a power supply control device as described in any one of claims 1 to 9.

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