Multi-output protection control power supply device

Abstract

The utility model discloses a multipath output protection control power supply device, which comprises a power supply modulation module, a plurality of output modules and a plurality of over-current self-locking protection modules, the plurality of output modules are connected in parallel, each output module at least comprises a switch unit, and the over-current self-locking protection modules are connected in parallel. The head end of each switch unit is connected with the output end of the power supply modulation module, the tail end of each switch unit is used for being connected with a corresponding load, the controlled end of each switch unit is used for being connected with a control module, and each overcurrent self-locking protection module is connected with the output module in a one-to-one correspondence mode. The sampling end of the overcurrent self-locking protection module is connected with the corresponding output module to sample the working current, the control end of the overcurrent self-locking protection module is connected with the controlled end of the corresponding switch unit to drive the switch unit to be disconnected when the working current exceeds a current threshold value, and the design is convenient to use, safe and reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to power supply equipment technical field especially relates to a kind of multi-output protection control power supply device. BACKGROUND

[0002] The existing power supply device for load power supply, usually one power supply device sets an output end, which is correspondingly connected with a load to supply power, in order to expand port, so that the power supply device can supply power for more loads, the power supply device is provided with multiple output ends, and the output voltage level of each output end can be same or different, and each output end is correspondingly connected with a load.

[0003] But in the use process, when the current and voltage of certain output end appear problems or load appears fault, the current of this output end will cause influence to the output of other output ends, and the whole power supply device needs to be stopped, inconvenient to use. UTILITY MODEL CONTENTS

[0004] The utility model aims at at least solving one of the technical problems existing in prior art. For this purpose, the utility model provides a kind of multi-output protection control power supply device, convenient to use, safe and reliable.

[0005] A kind of multi-output protection control power supply device according to the first aspect embodiment of the utility model, comprising: power modulation module;Multiple output modules, multiple the output module is parallelly connected with each other, each the output module at least includes switch unit, the head of each described switch unit is connected with the output end of power modulation module, the tail of each described switch unit is used for the load connection of respective corresponding, the controlled end of the switch unit is used to be connected with control module;Multiple overcurrent self-locking protection modules, each overcurrent self-locking protection module is correspondingly connected with the output module, the sampling end of the overcurrent self-locking protection module is connected with corresponding the output module to sample operating current, the control end of the overcurrent self-locking protection module is connected with the controlled end of corresponding the switch unit to drive the switch unit to disconnect when operating current exceeds current threshold.

[0006] A kind of multi-output protection control power supply device according to the utility model embodiment, at least has following beneficial effects:

[0007] The utility model discloses a multi -way output protection control power supply device, and power modulation module modulates the power supply and exports through each output module, and the current of each output module needs to pass through switch unit, and the overcurrent self -locking protection module has multiple, and detects the working current of each output module one by one, when the working current exceeds the current threshold, and the overcurrent self -locking protection module controls the switch unit of corresponding and turns off, and the corresponding output module will stop exporting power supply, but does not influence the output of other output modules, and the design is convenient to use, safe and reliable.

[0008] According to some embodiments of the utility model, one of the output modules further includes diode D803, diode D804, resistor R811 and capacitor C805, and the switch unit of the output module includes a semiconductor switch tube Q802; the negative electrode of the diode D803 is connected to the first pole of the output end of the power modulation module and forms the first pole of the output module, the positive electrode of the diode D803 is connected to one end of the capacitor C805 and the first end of the switch tube Q802 respectively and forms the second pole of the output module, the other end of the capacitor C805 is connected to one end of the resistor R811 and the positive electrode of the diode D804 respectively, the negative electrode of the diode D804 is connected to the other end of the resistor R811, the tail end of the switch tube Q802 and the second pole of the output end of the power modulation module respectively, and the controlled end of the switch tube Q802 is connected to the control module.

[0009] According to some embodiments of the utility model, the output module further includes a sampling resistor JR501, the tail end of the switch tube Q802 is connected to the second pole of the output end of the power modulation module through the sampling resistor JR501, and the sampling end of the overcurrent self-locking protection module is connected to the tail end of the switch tube Q802 and one end of the sampling resistor JR501 respectively.

[0010] According to some embodiments of the utility model, the overcurrent self-locking protection module corresponding to one of the output modules includes a comparison unit, a reference unit and a semiconductor switch tube Q801, the reference unit is used to provide a reference signal representing a current threshold, the first input end of the comparison unit is connected to the tail end of the switch tube Q802 and one end of the sampling resistor JR501 respectively, the second input end of the comparison unit is connected to the reference unit, the output end of the comparison unit is connected to the controlled end of the switch tube Q801, the first end of the switch tube Q801 is connected to the controlled end of the switch tube Q802, and the tail end of the switch tube Q801 is grounded.

[0011] According to some embodiments of the utility model, the reference unit includes resistance R815, resistance R816 and capacitor C808, one end of resistance R815 is used for connecting with reference signal given source, the other end of resistance R815 is connected with one end of resistance R816, one end of capacitor C808 and the second input end of comparison unit respectively, the other end of resistance R816 and the other end of capacitor C808 are all grounded.

[0012] According to some embodiments of the utility model, the overcurrent self-locking protection module further includes diode D805, the output end of comparison unit is connected with the anode of diode D805, the cathode of diode D805 is connected with the controlled end of switch tube Q801.

[0013] According to some embodiments of the utility model, the power modulation module includes switching power module, transformer module and rectifier module, the output end of switching power module is connected with the input end of transformer module, the output end of transformer module is connected with the input end of rectifier module, and the output end of rectifier module is connected with the first end of each switch unit.

[0014] According to some embodiments of the utility model, the rectifier module includes semiconductor switch tube Q503, diode D504, resistance R512 and capacitor C503, the cathode of diode D504 is connected with one end of capacitor C503, the first end of switch tube Q503 and the output end of transformer module respectively, the other end of capacitor C503 is connected with one end of resistance R512, the other end of resistance R512 is connected with the anode of diode D504, the tail end of switch tube Q503 and output module respectively.

[0015] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0017] Figure 1 It is the principle structure block diagram of one kind of embodiment of the utility model multiway output protection control power supply device;

[0018] Figure 2 It is the circuit schematic diagram of power modulation module and output module of one kind of embodiment of the utility model multiway output protection control power supply device;

[0019] Figure 3The circuit schematic view of one overcurrent self-locking protection module of one of the embodiments of the utility model multi-output protection control power supply device is as follows:

[0020] Figure 4 The circuit schematic view of another overcurrent self-locking protection module of one of the embodiments of the utility model multi-output protection control power supply device is as follows.

[0021] Reference signs:

[0022] Power supply modulation module 100, transformer module 110, rectifier module 120, output module 200, overcurrent self-locking protection module 300, comparison unit 310, reference unit 320. DETAILED DESCRIPTION

[0023] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as a limitation on the utility model.

[0024] In the description of the utility model, it is understood that the orientation description, such as the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0025] In the description of the utility model, the meaning of several is one or more, and the meaning of multiple is more than two, greater than, less than, more than and the like are understood as not including the number, above, below, within and the like are understood as including the number. If the first, second is described, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0026] In the description of the utility model, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0027] As Figures 1 to 4 shown, according to the first aspect embodiment of the utility model discloses a kind of multi-output protection control power supply device, including power modulation module 100, multiple output modules 200 and multiple overcurrent self-locking protection modules 300, multiple the output module 200 is parallelly connected with each other, each the output module 200 at least includes switch unit, the head of each described switch unit is connected with the output end of power modulation module 100, the tail of each described switch unit is used for each corresponding load connection, the controlled end of the switch unit is used to be connected with control module, each overcurrent self-locking protection module 300 is connected with the output module 200 one by one, the sampling end of the overcurrent self-locking protection module 300 is connected with corresponding output module 200 to sample operating current, the control end of the overcurrent self-locking protection module 300 is connected with the controlled end of corresponding switch unit to drive the switch unit to disconnect when operating current exceeds current threshold.

[0028] It can be understood that power modulation module 100 can be selected in conventional power supply module, for example, in some embodiments of the utility model, the power modulation module 100 includes switching power supply module, transformer module 110 and rectifier module 120, the output end of the switching power supply module is connected with the input end of the transformer module 110, the output end of the transformer module 110 is connected with the input end of the rectifier module 120, and the output end of the rectifier module 120 is connected with the head of each switch unit respectively.

[0029] Switching power supply module includes rectifier circuit, switching power supply chip, power switch tube and the like (not shown in the figure), transformer module 110 includes mutually coupled primary winding and secondary winding, the input end of rectifier circuit is connected with external power supply, the output end of rectifier circuit is connected with the head of power switch tube and one end of primary winding respectively, the other end of primary winding and the tail of power switch tube are grounded, and the secondary winding is connected with the input end of rectifier module 120.

[0030] In some embodiments of the utility model, the rectifier module 120 includes semiconductor switch tube Q503, diode D504, resistor R512 and capacitor C503, the negative electrode of diode D504 is connected with one end of capacitor C503, the head of switch tube Q503 and the output end of transformer module 110 respectively, the other end of capacitor C503 is connected with one end of resistor R512, the other end of resistor R512 is connected with the positive electrode of diode D504, the tail of switch tube Q503 and output module 200 respectively.

[0031] Specifically, one end of the secondary winding is as the positive pole of the output module 200, the other end of the secondary winding is connected with the first end of the switch tube Q503, the tail end of the switch tube Q503 forms the negative pole of the output module 200, and the load is connected with the positive pole and the negative pole of the output module 200 respectively to form a power supply circuit, specifically, the switch tube Q503 can be a triode, a MOS tube and the like, the control module is connected with the controlled end of the switch tube Q503, and the on-off of the switch tube Q503 is controlled, so that the alternating current output by the transformer module 110 is rectified and the size of the working current is modulated.

[0032] The utility model discloses a multi -way output protection control power supply device, and power modulation module 100 modulation comes out power supply and is output through each output module 200, and the current of each output module 200 needs to pass through switch unit, and overcurrent self -locking protection module 300 has multiple, and the working current of each output module 200 is detected one by one, when the working current exceeds the current threshold value, and overcurrent self -locking protection module 300 controls the corresponding switch unit to shut down, and the corresponding output module 200 will stop outputting power supply, but does not affect the output of other output modules 200, and the design is convenient to use, safe and reliable.

[0033] The output module 200 has multiple, and one of the output modules 200 is taken as an example, in some embodiments of the utility model, the output module 200 further includes diode D803, diode D804, resistance R811 and capacitor C805, and the switch unit of the output module 200 includes the switch tube Q802 of semiconductor;The negative pole of the diode D803 and the first pole of the output end of the power modulation module 100 form the first pole of the output module 200, the positive pole of the diode D803 is connected with one end of the capacitor C805 and the first end of the switch tube Q802 respectively and forms the second pole of the output module 200, the other end of the capacitor C805 is connected with one end of the resistance R811 and the positive pole of the diode D804 respectively, the negative pole of the diode D804 is connected with the other end of the resistance R811, the tail end of the switch tube Q802 and the second pole of the output end of the power modulation module 100 respectively, and the controlled end of the switch tube Q802 is connected with the control module.

[0034] Among them, the switch tube Q802 can be a triode, a MOS tube and the like, the resistance R811 and the capacitor C805 are connected in series and then are connected in parallel with the switch tube Q802, and the output power is power compensated, when the load is connected to the input module, the control module can control the switch tube Q802 to be turned on, the power supply circuit is turned on, and the power supply device supplies power to the load corresponding to the output module 200, and when the working current of the power supply circuit exceeds the current threshold value, the overcurrent self-locking protection module 300 controls the switch tube Q802 to be disconnected.

[0035] In some embodiments of the utility model, as shown in Figure 2 As shown, the output module 200 further includes a sampling resistor JR501, the tail end of the switch tube Q802 is connected with the second pole of the output end of the power supply modulation module 100 through the sampling resistor JR501, and the sampling end of the overcurrent self-locking protection module 300 is connected with the tail end of the switch tube Q802 and one end of the sampling resistor JR501 respectively.

[0036] The working current flows through the sampling resistor JR501 to form a sampling voltage, and the sampling end of the overcurrent self-locking protection module 300 obtains the sampling voltage to determine whether the working current exceeds the current threshold value, and if so, the switch tube Q802 is controlled to be turned off.

[0037] In some embodiments of the utility model, as shown in Figure 3 As shown, the overcurrent self-locking protection module 300 corresponding to the output module 200 includes a comparison unit 310, a reference unit 320 and a semiconductor switch tube Q801, the reference unit 320 is used to provide a reference signal representing a current threshold value, the first input end of the comparison unit 310 is connected with the tail end of the switch tube Q802 and one end of the sampling resistor JR501 respectively, the second input end of the comparison unit 310 is connected with the reference unit 320, the output end of the comparison unit 310 is connected with the controlled end of the switch tube Q801, the first end of the switch tube Q801 is connected with the controlled end of the switch tube Q802, and the tail end of the switch tube Q801 is grounded, as shown in Figure 3 As shown, Figure 3 It is another overcurrent self-locking protection module 300.

[0038] The reference unit 320 provides a reference signal for the second input end of the comparison unit 310, the reference signal can be embodied in the form of a reference voltage, and the comparison unit 310 can be a conventional comparator, the comparison unit 310 compares the sampling voltage and the reference voltage, when the sampling voltage is higher than the reference voltage, the working current is greater than the current threshold value, then the comparison unit 310 outputs a high level, when the sampling voltage is lower than the reference voltage, the working current is less than the current threshold value, then the comparison unit 310 outputs a low level.

[0039] In some embodiments of the utility model, the reference unit 320 includes a resistor R815, a resistor R816 and a capacitor C808, one end of the resistor R815 is used to be connected with a reference signal given source, the other end of the resistor R815 is connected with one end of the resistor R816, one end of the capacitor C808 and the second input end of the comparison unit 310 respectively, and the other end of the resistor R816 and the other end of the capacitor C808 are both grounded.

[0040] The reference signal given source can set different given signals according to the size of the current threshold value set as needed, thereby forming different reference signals.

[0041] In some embodiments of the utility model, the overcurrent self-locking protection module 300 further includes a diode D805, the output of the comparison unit 310 is connected with the positive pole of the diode D805, the negative pole of the diode D805 is connected with the controlled end of the switch tube Q801, the unidirectional conducting characteristic of the diode D805 can make the signal of one side of the switch tube Q801 not flow back to one side of the comparison unit 310 and affect the judgment of the comparison unit 310, and the control is more stable and reliable.

[0042] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0043] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A multi-output protection and control power supply device, characterized in that, include: Power modulation module; Multiple output modules are connected in parallel. Each output module includes at least one switching unit. The first end of each switching unit is connected to the output terminal of the power modulation module, and the last end of each switching unit is used for connecting to its corresponding load. The controlled end of each switching unit is used for connecting to a control module. Multiple overcurrent self-locking protection modules are connected to each output module in a one-to-one correspondence. The sampling end of each overcurrent self-locking protection module is connected to the corresponding output module to sample the operating current, and the control end of each overcurrent self-locking protection module is connected to the controlled end of the corresponding switching unit to drive the switching unit to disconnect when the operating current exceeds the current threshold.

2. The multi-output protection and control power supply device according to claim 1, characterized in that: The output module further includes diode D803, diode D804, resistor R811, and capacitor C805. The switching unit of the output module includes a semiconductor switching transistor Q802. The cathode of diode D803 is connected to the first terminal of the output of the power modulation module, forming the first terminal of the output module. The anode of diode D803 is connected to one end of capacitor C805 and the first terminal of switching transistor Q802, forming the second terminal of the output module. The other end of capacitor C805 is connected to one end of resistor R811 and the anode of diode D804. The cathode of diode D804 is connected to the other end of resistor R811, the tail end of switching transistor Q802, and the second terminal of the output of the power modulation module. The controlled terminal of switching transistor Q802 is connected to the control module.

3. The multi-output protection and control power supply device according to claim 2, characterized in that: The output module also includes a sampling resistor JR501. The tail end of the switching transistor Q802 is connected to the second pole of the output terminal of the power modulation module through the sampling resistor JR501. The sampling terminal of the overcurrent self-locking protection module is connected to the tail end of the switching transistor Q802 and one end of the sampling resistor JR501.

4. A multi-output protection and control power supply device according to claim 3, characterized in that: The overcurrent self-locking protection module corresponding to one of the output modules includes a comparison unit, a reference unit, and a semiconductor switching transistor Q801. The reference unit is used to provide a reference signal characterizing the current threshold. The first input terminal of the comparison unit is connected to the tail end of the switching transistor Q802 and one end of the sampling resistor JR501, respectively. The second input terminal of the comparison unit is connected to the reference unit. The output terminal of the comparison unit is connected to the controlled terminal of the switching transistor Q801. The first end of the switching transistor Q801 is connected to the controlled terminal of the switching transistor Q802. The tail end of the switching transistor Q801 is grounded.

5. A multi-output protection and control power supply device according to claim 4, characterized in that: The reference unit includes resistors R815 and R816 and capacitor C808. One end of resistor R815 is connected to a reference signal source. The other end of resistor R815 is connected to one end of resistor R816, one end of capacitor C808, and the second input terminal of the comparison unit. The other ends of resistor R816 and capacitor C808 are both grounded.

6. A multi-output protection and control power supply device according to claim 4, characterized in that: The overcurrent self-locking protection module also includes a diode D805. The output terminal of the comparator unit is connected to the positive terminal of the diode D805, and the negative terminal of the diode D805 is connected to the controlled terminal of the switching transistor Q801.

7. A multi-output protection and control power supply device according to claim 1, characterized in that: The power modulation module includes a switching power supply module, a transformer module, and a rectifier module. The output terminal of the switching power supply module is connected to the input terminal of the transformer module, the output terminal of the transformer module is connected to the input terminal of the rectifier module, and the output terminal of the rectifier module is connected to the first end of each of the switching units.

8. A multi-output protection and control power supply device according to claim 7, characterized in that: The rectifier module includes a semiconductor switching transistor Q503, a diode D504, a resistor R512, and a capacitor C503. The cathode of the diode D504 is connected to one end of the capacitor C503, the first end of the switching transistor Q503, and the output terminal of the transformer module. The other end of the capacitor C503 is connected to one end of the resistor R512. The other end of the resistor R512 is connected to the anode of the diode D504, the tail end of the switching transistor Q503, and the output module.

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