CN220874426U

CN220874426U - Power module and power supply system

Info

Publication number: CN220874426U
Application number: CN202322439005.1U
Authority: CN
Inventors: 华东; 孙中伟; 张少育; 林彬
Original assignee: Shenzhen Hello Tech Energy Co Ltd
Current assignee: Shenzhen Hello Tech Energy Co Ltd
Priority date: 2023-09-07
Filing date: 2023-09-07
Publication date: 2024-04-30
Anticipated expiration: 2033-09-07

Abstract

The application provides a power supply module and a power supply system. The second auxiliary power circuit is connected between a second power supply and a second primary winding to receive a second voltage output by the second power supply and supply power to the second primary winding. The control circuit is used for controlling one of the first auxiliary power supply circuit and the second auxiliary power supply circuit to stop working when the first power supply outputs a first voltage and the second power supply outputs a second voltage. The power supply module can work normally no matter under the condition of high-voltage side power supply or low-voltage side power supply. According to the application, the primary windings of the first auxiliary power supply circuit and the second auxiliary power supply circuit are wound in one transformer, so that the cost can be reduced.

Description

Power module and power supply system

Technical Field

The present application relates to the field of power technologies, and in particular, to a power module and a power supply system.

Background

The auxiliary power supply can generally provide a stable power supply for the control circuit and the driving circuit, so that the control circuit and the driving circuit can work stably and reliably.

Currently, multiple independent auxiliary power supplies are used in a conventional power supply system, for example, an output of a high-voltage auxiliary power supply is connected in series with an input of a low-voltage auxiliary power supply, and an output of the low-voltage auxiliary power supply is connected in series with an input of the high-voltage auxiliary power supply, so that the power supply system can work by high-voltage side power supply or low-voltage side power supply. However, the above power supply system requires multiple independent power supplies to be connected in series, which is costly.

Disclosure of utility model

The embodiment of the application discloses a power supply module and a power supply system applying the power supply module.

A first aspect of the present application provides a power supply module comprising:

The transformer comprises a first primary winding, a second primary winding and at least one secondary winding;

A first auxiliary power supply circuit connected between a first power supply and the first primary winding, the first auxiliary power supply circuit configured to receive a first voltage output by the first power supply and supply power to the first primary winding so that the at least one secondary winding generates a winding voltage;

A second auxiliary power supply circuit connected between a second power supply and the second primary winding, the second auxiliary power supply circuit configured to receive a second voltage output by the second power supply and supply power to the second primary winding so that the at least one secondary winding generates a winding voltage;

And the control circuit is used for controlling one of the first auxiliary power supply circuit and the second auxiliary power supply circuit to stop working when the first power supply outputs the first voltage and the second power supply outputs the second voltage.

Based on the design, the power module can work normally under the condition of high-voltage side power supply or low-voltage side power supply. According to the application, the primary windings of the first auxiliary power supply circuit and the second auxiliary power supply circuit are wound in one transformer, so that the cost can be reduced.

As an optional implementation manner, the control circuit is connected to the second power supply and the first auxiliary power supply circuit, and is configured to detect whether the second power supply outputs the second voltage, and control the first auxiliary power supply circuit to stop working when the first power supply outputs the first voltage and the second power supply outputs the second voltage.

As an optional implementation manner, the control circuit is connected to the first power supply and the second auxiliary power supply circuit, and is configured to detect whether the first power supply outputs the first voltage, and control the second auxiliary power supply circuit to stop working when the first power supply outputs the first voltage and the second power supply outputs the second voltage.

As an alternative implementation manner, the first auxiliary power supply circuit includes a first switching tube, a first controller and a first feedback circuit, the first feedback circuit is connected between the control circuit and the first controller, a first output end of the first power supply is connected with a first end of the first primary winding, the first switching tube is connected between a second end of the first primary winding and a second output end of the first power supply, the first controller is connected with the first switching tube, and the first controller is used for controlling the state of the first switching tube;

When the control circuit detects that the second power supply outputs the second voltage, the control circuit is used for outputting a first current signal to the first feedback circuit, and the first feedback circuit outputs a first control signal to the first controller according to the first current signal so as to control the first controller to stop working.

As an alternative implementation manner, the control circuit includes a first resistor, a second resistor and a first controllable precise voltage stabilizing source, a first end and a second end of the first controllable precise voltage stabilizing source are connected with the first feedback circuit, an adjusting end of the first controllable precise voltage stabilizing source is connected with the second power supply through the first resistor, and an adjusting end of the first controllable precise voltage stabilizing source is also connected with a second end of the first controllable precise voltage stabilizing source through the second resistor.

As an alternative implementation manner, the control circuit includes a detection circuit and a switching device, the detection circuit is connected with a second power supply, the detection circuit is used for detecting whether the second power supply outputs the second voltage, and the switching device is connected between the first feedback circuit and the detection circuit; when the detection circuit detects that the second power supply outputs the second voltage, the detection circuit controls the switching device to be conducted or closed, and further controls the first feedback circuit to output a control signal to the first controller so that the first controller stops working.

As an alternative implementation manner, the second auxiliary power supply circuit includes a second switching tube, a second controller and a second feedback circuit, the second feedback circuit is connected between the control circuit and the second controller, a first output end of the second power supply is connected with a first end of the second primary winding, the second switching tube is connected between a second end of the second primary winding and a second output end of the second power supply, the second controller is connected with the second switching tube, and the second controller is used for controlling the state of the second switching tube;

When the control circuit detects that the first power supply outputs the first voltage, the control circuit is used for outputting a second current signal to the second feedback circuit, and the second feedback circuit outputs a second control signal to the second controller according to the second current signal so as to control the second controller to stop working.

As an alternative implementation manner, the control circuit includes a third resistor, a fourth resistor and a second controllable precise voltage stabilizing source, a first end and a second end of the second controllable precise voltage stabilizing source are connected with the second feedback circuit, an adjusting end of the second controllable precise voltage stabilizing source is connected with the first power supply through the third resistor, and an adjusting end of the second controllable precise voltage stabilizing source is connected with a second end of the second controllable precise voltage stabilizing source through the fourth resistor.

As an alternative implementation manner, the control circuit includes a detection circuit and a switching device, the detection circuit is connected with the first power supply, the detection circuit is used for detecting whether the first power supply outputs the first voltage, and the switching device is connected between the second feedback circuit and the detection circuit; when the detection circuit detects that the first power supply outputs the first voltage, the detection circuit controls the switching device to be conducted or closed, and further controls the second feedback circuit to output a control signal to the second controller so that the second controller stops working.

The second aspect of the present application also provides a power supply system, comprising at least one power module and a power module as described above, wherein the power module is used for electrically connecting with the at least one power module and supplying power to the at least one power module.

It should be understood that the power supply system according to the second aspect corresponds to the power supply module according to the first aspect, and thus, the advantages achieved by the power supply system may refer to the advantages of the corresponding power supply module provided above, which are not described herein.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly describe the drawings in the embodiments, it being understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is an application scenario diagram of a power module provided in an embodiment of the present application.

Fig. 2 is a schematic diagram of a power module according to an embodiment of the application.

Fig. 3 is another schematic diagram of a power module according to an embodiment of the application.

Fig. 4 is a circuit diagram of a power module according to an embodiment of the application.

Fig. 5 is another circuit diagram of a power module according to an embodiment of the application.

Fig. 6 is another circuit diagram of a power module according to an embodiment of the application.

Fig. 7 is another circuit diagram of a power module according to an embodiment of the application.

Fig. 8 is a schematic diagram of a power supply system according to an embodiment of the present application.

Detailed Description

The terms "first" and "second" are used below for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the described embodiments of the application may be combined with other embodiments.

The application provides a power supply module and a power supply system using the same. The power supply module may include a first auxiliary power circuit, a second auxiliary power circuit, a transformer, and a control circuit. The transformer may include a first primary winding, a second primary winding, and at least one secondary winding. Wherein. The first auxiliary power circuit is connected between the first power supply and the first primary winding, and is used for receiving a first voltage output by the first power supply and supplying power to the first primary winding so that at least one secondary winding generates a winding voltage. The second auxiliary power circuit is connected between a second power supply and a second primary winding, and is used for receiving a second voltage output by the second power supply and supplying power to the second primary winding so that at least one secondary winding generates a winding voltage. The control circuit may control one of the first auxiliary power supply circuit and the second auxiliary power supply circuit to stop operation and control the other to normally operate when the first power supply outputs the first voltage and the second power supply outputs the second voltage.

Referring to fig. 1, fig. 1 is an application scenario diagram of a power module 100 according to an embodiment of the application.

In this embodiment, the input end of the power module 100 is used for electrically connecting the first power source 201 and the second power source 202, and the output end of the power module 100 is used for electrically connecting at least one load. In fig. 1, three loads 300a, 300b, 300c are illustrated as examples, and more than three loads or less than three loads may be used, which is not limited by the present application.

In one scenario, the power module 100 may receive the first voltage of the first power source 201, and convert the first voltage to output a supply voltage, thereby supplying power to the loads 300a, 300b, 300 c. In another scenario, the power module 100 may further receive a second voltage of the second power supply 201, and convert the second voltage to output a supply voltage, so as to supply power to the loads 300a, 300b, and 300 c. It will be appreciated that the first power supply 201 and the second power supply 202 may be completely isolated power supply systems, or may be a range of high voltages and a range of low voltages in the same power supply system.

Referring to fig. 2, fig. 2 is a schematic diagram of a power module 100 according to an embodiment of the application.

As shown in fig. 2, the power module 100 includes a first auxiliary power circuit 10, a second auxiliary power circuit 20, a transformer 30, a control circuit 50, and at least one output terminal circuit. In fig. 2, three output circuits 40a, 40b, 40c are illustrated as examples, and more than three or less than three may be used, which is not limited by the present application.

The transformer 30 includes a first primary winding 31, a second primary winding 32, a magnetic core 34, and at least one secondary winding, and fig. 1 illustrates three secondary windings 33a, 33b, 33c, which may be more or less than three, and the application is not limited thereto. The secondary windings 33a, 33b, 33c are identical in number and in one-to-one correspondence with the output circuits 40a, 40b, 40 c.

The first primary winding 31 is connected to a first power supply 201 via a first auxiliary power supply circuit 10. The second primary winding 32 is connected to a second power supply 202 through a second auxiliary power circuit 20. The secondary windings 33a, 33b, 33c are connected to the output circuits 40a, 40b, 40c, respectively. Wherein the first voltage output by the first power supply 201 and the second voltage output by the second power supply 202 are isolated from each other by the transformer 30.

The control circuit 50 is connected between the first auxiliary power supply circuit 10 and the second power supply 202. The control circuit 50 may detect whether the second power supply 202 outputs the second voltage, and may control the operation state of the first auxiliary power supply circuit 10.

The first auxiliary power circuit 10 may control the on and off of the input of the first primary winding 31 so that the output circuits led out from the secondary windings 33a, 33b, 33c of the transformer 30 normally output voltages. The second auxiliary power circuit 20 may control the on and off of the input of the second primary winding 32 so that the output circuits led out by the secondary windings 33a, 33b, 33c of the transformer 30 normally output voltages.

Specifically, the first auxiliary power circuit 10 may be configured to receive the first voltage output by the first power supply 201 and provide an output voltage to the first primary winding 31 of the transformer 30. The first primary winding 31 and the secondary windings 33a, 33b, 33c of the transformer 30 are coupled by a magnetic core 34. The first primary winding 31 of the transformer 30 is configured to receive the output voltage of the first auxiliary power circuit 10 and may generate a primary winding voltage. The secondary windings 33a, 33b, 33c of the transformer 30 are coupled to the first primary winding 31, and a secondary winding voltage may be generated across the secondary windings 33a, 33b, 33 c.

Specifically, the second auxiliary power circuit 20 may be configured to receive the second voltage output by the second power supply 202 and provide an output voltage to the second primary winding 32 of the transformer 30. The second primary winding 32 and the secondary windings 33a, 33b, 33c of the transformer 30 are coupled by a magnetic core 34. The second primary winding 32 of the transformer 30 is configured to receive the output voltage of the second auxiliary power circuit 20 and may generate a primary winding voltage. Secondary windings 33a, 33b, 33c of transformer 30 are coupled to second primary winding 32, and secondary winding voltages may be generated at secondary windings 33a, 33b, 33 c.

It is understood that the first primary winding and the second primary winding may each refer to a winding placed on the primary of the transformer. The secondary winding may refer to a winding placed on the secondary of the transformer.

In the first scenario, when the first power supply 201 outputs the first voltage and the second power supply 202 does not output the second voltage, that is, when the high voltage side has power and the low voltage side has no power, the first auxiliary power circuit 10 in the power module 100 operates normally. Wherein "the first auxiliary power circuit 10 is operating normally" means that the first auxiliary power circuit 10 can provide an output voltage to the first primary winding 31 of the transformer 30, so that a secondary winding voltage can be generated on the secondary windings 33a, 33b, 33 c.

In the second scenario, when the first power supply 201 does not output the first voltage and the second power supply 202 outputs the second voltage, i.e. the high voltage side is powered down and the low voltage side is powered up, the second auxiliary power circuit 20 in the power module 100 operates normally. Wherein "the second auxiliary power circuit 20 is operating normally" means that the second auxiliary power circuit 20 can provide an output voltage to the second primary winding 32 of the transformer 30, so that a secondary winding voltage can be generated on the secondary windings 33a, 33b, 33 c.

In the third scenario, when the first power supply 201 outputs the first voltage and the second power supply 202 outputs the second voltage, i.e. the high-side and the low-side are simultaneously powered, the control circuit 50 will control the first auxiliary power supply circuit 10 to stop working, and at this time, the second auxiliary power supply circuit 20 works normally. The power module 100 of the present application is designed such that the power module 100 can normally operate regardless of the high-side power supply or the low-side power supply by winding the first primary winding of the high-side auxiliary power supply circuit and the second primary winding of the low-side auxiliary power supply circuit in one transformer.

Referring to fig. 3, fig. 3 is a schematic diagram of a power module 100 according to an embodiment of the application.

The difference from the power supply module 100 shown in the embodiment of fig. 2 is that, as shown in fig. 3, in the present embodiment, the control circuit 50 is connected between the second auxiliary power supply circuit 20 and the first power supply 102. The control circuit 50 in this embodiment can detect whether the first power supply 201 outputs the first voltage, and can control the operation state of the second auxiliary power supply circuit 20.

For example, when the first power source 201 outputs the first voltage and the second power source 202 outputs the second voltage, the control circuit 50 controls the second auxiliary power source circuit 20 to stop operating, and at this time, the first auxiliary power source circuit 10 operates normally.

Referring to fig. 4, fig. 4 is a circuit diagram of a power module 100 according to an embodiment of the application. In this embodiment, the power module 100 is a flyback topology-based power module.

As shown in fig. 4, the first auxiliary power supply circuit 10 includes a control circuit 50, a first feedback circuit 12, a first controller U1, and a first switching transistor Q1. The second auxiliary power supply circuit 20 includes a second feedback circuit 22, a second controller U2, and a second switching tube Q2. The transformer 30 further includes a first auxiliary winding L1 and a second auxiliary winding L2.

The positive output terminal hv+ of the first power supply 201 is connected to the anode of the diode D1, the cathode of the diode D1 is connected to the first end of the first primary winding 31, and the cathode of the diode D1 is also connected to the negative output terminal HV-of the first power supply 201 via the capacitor C1. The first end of the first switching tube Q1 is connected with the signal OUTPUT end OUTPUT of the first controller U1, the second end of the first switching tube Q1 is connected with the second end of the first primary winding 31, and the third end of the first switching tube Q1 is connected with the negative OUTPUT end HV-of the first power supply 201 through a resistor R11. GND of the first controller U1 is connected with a negative output end HV-of the first power supply 201, a Current detection end (CS) of the first controller U1 is connected with a node between a third end of the first switching tube Q1 and a resistor R11, a power end VCC of the first controller U1 is connected with a cathode of a diode D3, an anode of the diode D3 is connected with a first end of the first auxiliary winding L1, a second end of the first auxiliary winding L1 is connected with the negative output end HV-of the first power supply 201, and a power end VCC of the first controller U1 is also connected with the negative output end HV-of the first power supply 201 through a capacitor C3. The first auxiliary winding L1 is used to supply power to the first controller U1 after the power module 100 starts to establish balance, so as to improve power efficiency.

The first end of the first switching tube Q1 is a control end of the first switching tube Q1. For example, the signal OUTPUT terminal OUTPUT of the first controller U1 may OUTPUT a pulse width modulation (Pulse width modulation, PWM) signal to the first terminal of the first switching tube Q1 to control the on and off of the first switching tube Q1, thereby controlling the on and off of the input terminal of the first primary winding 31 of the transformer 30, so that the OUTPUT terminal circuit led out from the secondary winding of the transformer 30 normally OUTPUTs a voltage. For example, when the first switching tube Q1 is turned on, energy is stored in the transformer 30, the rectifier diodes in the output side circuits 40a, 40b, 40c are in the reverse cut-off state, and when the first switching tube Q1 is turned off, the stored energy in the transformer 30 flows to the load through the rectifier diodes in the output side circuits 40a, 40b, 40 c.

In this embodiment, the first feedback circuit 12 includes resistors R1-R5, a photo coupler U3, a capacitor C5, and a controllable precision voltage stabilizing source D5. The photocoupler U3 includes a first light emitting unit and a first switching unit. The first switching unit includes an emitter and a collector. The collector of the first switch unit is connected to a Voltage Feedback terminal (VFB) of the first controller U1, and the emitter of the first switch unit is connected to a negative output terminal HV-of the first power supply 201.

The positive pole of first lighting unit passes through resistance R2 to be connected the arbitrary output circuit in multiplex output circuit 40a, 40b, 40C, and the positive pole of first lighting unit still passes through resistance R3 to be connected the negative pole of first lighting unit, and controllable accurate steady voltage source D5's first end is connected to the negative pole of first lighting unit, and the first end of resistance R1 is still passed through resistance R4 and electric capacity C5 to the negative pole of first lighting unit, and node P2 is connected to the second end of resistance R1, and wherein node P2 can be connected to arbitrary output circuit of transformer 30. The second end of the controllable precision voltage stabilizing source D5 is connected with the first end of the resistor R5, and the first end of the resistor R5 is also connected to the ground of any one of the output end circuits 40a, 40b and 40 c. The adjusting end of the controllable precise voltage stabilizing source D5 is connected with the first end of the resistor R1 and the second end of the resistor R5. The control circuit 50 is connected at a node P1 between a first end of the controllable precision voltage regulator D5 and the cathode of the first light emitting unit. The control circuit 50 is configured to detect whether the second power supply 202 outputs the second voltage, and output a control signal to the first controller U1 through the first feedback circuit 12 when the second voltage is acquired, so that the first controller U1 stops working.

The control circuit 50 includes a resistor R13, a resistor R14, and a controllable precision regulated source D7.

The first end of the controllable precise voltage stabilizing source D7 is connected to the node P1, the second end of the controllable precise voltage stabilizing source D7 is connected with the first end of the resistor R5, the adjusting end of the controllable precise voltage stabilizing source D7 is connected with the output end LV+ of the second power supply 202 through the resistor R13, and the adjusting end of the controllable precise voltage stabilizing source D7 is connected with the second end of the controllable precise voltage stabilizing source D7 through the resistor R14. In other words, the control circuit 50 may detect in real time whether the second power supply 202 outputs the second voltage, and output the control signal to the voltage feedback terminal VFB of the first controller U1 through the first feedback circuit 12 when detecting that the second power supply 202 outputs the second voltage.

The positive output LV+ of the second power supply 202 is connected to the anode of the diode D2, the cathode of the diode D2 is connected to the first end of the second primary winding 32, and the cathode of the diode D2 is also connected to the negative output LV-of the second power supply 202 via the capacitor C2. The first end of the second switching tube Q2 is connected with the signal OUTPUT end OUTPUT of the second controller U2, the second end of the second switching tube Q2 is connected with the second end of the first primary winding 32, and the third end of the second switching tube Q2 is connected with the negative OUTPUT end LV-of the second power supply 202 through a resistor R12. GND of the second controller U2 is connected with a negative output end LV-of the second power supply 202, a current detection end CS of the second controller U2 is connected with a node between a third end of the second switching tube Q2 and a resistor R12, a power end VCC of the second controller U2 is connected with a cathode of a diode D4, an anode of the diode D4 is connected with a first end of the second auxiliary winding L2, a second end of the second auxiliary winding L2 is connected with the negative output end LV-of the second power supply 202, and a power end VCC of the second controller U2 is also connected with the negative output end LV-of the second power supply 202 through a capacitor C4. The second auxiliary winding L2 is used to supply power to the second controller U2 after the power module 100 starts to establish balance, so as to improve power efficiency.

The first end of the second switching tube Q2 is the control end of the second switching tube Q2. For example, the signal OUTPUT terminal OUTPUT of the second controller U2 may OUTPUT a PWM signal to the first terminal of the second switching tube Q2 to control the on and off of the second switching tube Q2, thereby controlling the on and off of the input terminal of the second primary winding 32 of the transformer 30, so that the OUTPUT terminal circuit led out from the secondary winding of the transformer 30 normally OUTPUTs a voltage. For example, when the second switching tube Q2 is turned on, energy is stored in the transformer 30, the rectifier diodes in the output end circuits 40a, 40b, 40c are in the reverse cut-off state, and when the second switching tube Q2 is turned off, the stored energy in the transformer 30 flows to the load through the rectifier diodes in the output end circuits 40a, 40b, 40 c.

In this embodiment, the second feedback circuit 22 includes resistors R6-R10, a photo coupler U4, a capacitor C6 and a controllable precision voltage stabilizing source D6. The photocoupler U4 includes a second light emitting unit and a second switching unit. The second switching unit includes an emitter and a collector. The collector of the second switching unit is connected to the voltage feedback terminal VFB of the second controller U2, and the emitter of the second switching unit is connected to the negative output terminal LV-of the second power supply 202.

The positive pole of second luminescence unit passes through resistance R7 to be connected the arbitrary output circuit in multiplexing output circuit 40a, 40b, 40C, and the positive pole of second luminescence unit still passes through resistance R6 to be connected the negative pole of second luminescence unit, and the first end of controllable accurate steady voltage source D6 is connected to the negative pole of second luminescence unit, and the first end of resistance R8 is still passed through resistance R9 and electric capacity C6 to the negative pole of second luminescence unit, and node P3 is connected to the second end of resistance R8, and wherein node P3 can be connected to arbitrary output circuit of transformer 30. The second end of the controllable precision voltage stabilizing source D6 is connected with the first end of the resistor R10, and the first end of the resistor R10 is also connected to the ground of any one of the output end circuits 40a, 40b and 40 c. The adjusting end of the controllable precise voltage stabilizing source D6 is connected with the first end of the resistor R8 and the second end of the resistor R10.

It is understood that in the embodiment of the present application, the first switching transistor Q1 and the second switching transistor Q2 may be Metal-Oxide-semiconductor field effect transistors (MOSFETs), insulated gate bipolar transistors (Insulated Gate Bipolar Transistor, IGBTs), thyristors, bipolar power transistors (bipolarpower transistor), or wide bandgap semiconductor field effect transistors.

When the first power supply 201 outputs the first voltage and the second power supply 202 does not output the second voltage, the first auxiliary power supply circuit 10 in the power module 100 operates normally, the second auxiliary power supply circuit 20 does not operate, and the first controller U1 may control the first switching tube Q1 to be turned on and off so that the output end circuits 40a, 40b, 40c led out by the secondary windings 33a, 33b, 33c output the voltages normally. When the first power supply 201 does not output the first voltage and the second power supply 202 outputs the second voltage, the second auxiliary power supply circuit 20 in the power module 100 operates normally, the first auxiliary power supply circuit 10 does not operate, and the second controller U2 may control the second switching transistor Q2 to be turned on and off so that the output end circuits 40a, 40b, 40c led out by the secondary windings 33a, 33b, 33c output the voltages normally.

When the first power supply 201 outputs the first voltage and the second power supply 202 outputs the second voltage, the control circuit 50 may sample the second voltage output by the second power supply 202, where the second voltage, after being divided by the resistor R13 and the resistor R14, generates a large current by the controllable precision voltage stabilizing source D7, and pulls down the potential of the node P1, and the current of the controllable precision voltage stabilizing source D7 is output to the photo coupler U3, so that the photo coupler U3 outputs a control signal to the voltage feedback end VFB of the first controller U1. The voltage feedback terminal VFB of the first controller U1 stops working after receiving the control signal of the photo coupler U3. In other words, the first auxiliary power supply circuit 10 stops operating, and the second auxiliary power supply circuit 20 operates normally.

Based on the embodiment shown in fig. 4, when the first power supply 201 and the second power supply 202 supply power to the power supply module 100 at the same time, the power supply module 100 of the present application controls the second auxiliary power supply circuit 20 to operate normally, and controls the first auxiliary power supply circuit 10 to stop operating, so that the power supply module 100 can operate normally no matter when the power is supplied at the high voltage side or the low voltage side.

Referring to fig. 5, fig. 5 is a circuit diagram of a power module 100 according to another embodiment of the application.

The difference from the power supply module shown in the embodiment of fig. 4 is that the control circuit 50 of the present embodiment may include a detection circuit and a switching device. Wherein the detection circuit is connected to the second power supply 202 and the switching device is connected between the detection circuit and the first feedback circuit 12. In this embodiment, the detection circuit is configured to detect whether the second power supply 202 outputs the second voltage, and when the second voltage is detected, control the switching device to be turned on or turned off, so that the first feedback circuit 12 outputs a control signal to the first controller U1, thereby controlling the first controller U1 to stop working.

The switching device may be, but is not limited to, a relay, a triode, a MOS transistor, or the like.

As shown in fig. 5, in the present embodiment, the switching device may be a relay, in other words, the control circuit 50 includes the detection circuit 13 and the relay U5. The detection circuit 13 may comprise an operational amplifier or a comparator, or the detection circuit 13 may be a micro control unit (Microcontroller Unit, MCU), for example.

In the present embodiment, the detection circuit 13 is connected between the second power supply 202 and the relay U5. The two ends of the coil of the relay U5 are both connected with the detection circuit 13, the fixed contact of the relay U5 is connected with the first end of the resistor R5, and the movable contact of the relay U5 is connected with the node P1.

When the first power supply 201 outputs the first voltage and the second power supply 202 outputs the second voltage, that is, when the detection circuit 13 detects that the second power supply 202 outputs the second voltage, the relay coil is controlled to be energized, so that the relay U5 is attracted, the node P1 is grounded, so that the first light emitting unit of the photo coupler U3 generates a large current, and further, the photo coupler U3 outputs a control signal to the voltage feedback end VFB of the first controller U1. The voltage feedback terminal VFB of the first controller U1 stops working after receiving the control signal of the photo coupler U3. In other words, the first auxiliary power supply circuit 10 stops operating, and the second auxiliary power supply circuit 20 operates normally.

It will be appreciated that in other embodiments, the relay U5 may be replaced by a transistor, for example, the base of the transistor is connected to the detection circuit 13, the emitter of the transistor is connected to the node P1, and the collector of the transistor is grounded. When the detection circuit 13 detects that the second power supply 202 outputs the second voltage, the output signal is sent to the base electrode of the triode to control the triode to be turned on, and the node P1 is grounded, so that the first light emitting unit of the photo coupler U3 generates a large current, and the photo coupler U3 outputs a control signal to the voltage feedback end VFB of the first controller U1, thereby controlling the first controller U1 to stop working.

Referring to fig. 6, fig. 6 is a circuit diagram of a power module 100 according to another embodiment of the application.

The difference from the power module shown in the embodiment of fig. 4 is that, as shown in fig. 6, in this embodiment, the control circuit 50 includes a resistor R15, a resistor R16, and a controllable precision voltage-stabilizing source D8. The control circuit 50 is connected between the second auxiliary power supply circuit 20 and the first power supply 201. And a control circuit 50.

The first end of the controllable precise voltage stabilizing source D8 of the control circuit 50 is connected to the node P4, the second end of the controllable precise voltage stabilizing source D8 is connected with the first end of the resistor R10, the adjusting end of the controllable precise voltage stabilizing source D8 is connected with the positive output end HV+ of the first power supply 201 through the resistor R15, and the adjusting end of the controllable precise voltage stabilizing source D8 is connected with the second end of the controllable precise voltage stabilizing source D8 through the resistor R16. In other words, the control circuit 50 may detect in real time whether the first power supply 201 outputs the first voltage, and output the control signal to the voltage feedback terminal VFB of the second controller U2 through the second feedback circuit 22 when detecting that the first power supply 201 outputs the first voltage.

When the first power supply 201 outputs the first voltage and the second power supply 202 outputs the second voltage, the control circuit 50 may sample the first voltage output by the first power supply 201, where the first voltage, after being divided by the resistor R15 and the resistor R16, generates a large current by the controllable precision voltage stabilizing source D8, and pulls down the potential of the node P4, and the current of the controllable precision voltage stabilizing source D8 is output to the photo coupler U4, so that the photo coupler U4 outputs a control signal to the voltage feedback end VFB of the second controller U2. The voltage feedback terminal VFB of the second controller U2 stops working after receiving the control signal of the photo coupler U4. In other words, the second auxiliary power supply circuit 20 stops operating, and the first auxiliary power supply circuit 10 operates normally.

Referring to fig. 7, fig. 7 is a circuit diagram of a power module 100 according to another embodiment of the application.

The difference from the power supply module shown in the embodiment of fig. 6 is that the control circuit 50 of the present embodiment may include a detection circuit and a switching device. Wherein the detection circuit is connected to the second power supply 202 and the switching device is connected between the detection circuit and the second feedback circuit 22. In this embodiment, the detection circuit is configured to detect whether the first power supply 201 outputs the first voltage, and when the first voltage is detected, control the switching device to be turned on or turned off, so that the first feedback circuit 12 outputs a control signal to the first controller U1, thereby controlling the first controller U1 to stop working.

In this embodiment, the switching device is a relay, and as shown in fig. 7, the control circuit 50 includes a detection circuit 23 and a relay U6.

In the present embodiment, the detection circuit 23 is connected between the first power supply 201 and the relay U6. The two ends of the coil of the relay U6 are both connected with the detection circuit 23, the stationary contact of the relay U6 is connected with the first end of the resistor R10, and the movable contact of the relay U6 is connected with the node P4.

The detection circuit 23 may be used to detect and monitor whether the first power supply 201 is powered, i.e. the detection circuit 23 may be used to detect whether the first power supply 201 outputs the first voltage.

When the first power supply 201 outputs the first voltage and the second power supply 202 outputs the second voltage, that is, the detection circuit 23 controls the relay coil to be energized when detecting that the first power supply 201 outputs the first voltage, so that the relay U6 is attracted, the node P4 is grounded, so that the second light emitting unit of the photo coupler U4 generates a large current, and further, the photo coupler U4 outputs a control signal to the voltage feedback end VFB of the second controller U2. The voltage feedback terminal VFB of the second controller U2 stops working after receiving the control signal of the photo coupler U4. The second auxiliary power supply circuit 20 stops operating and the first auxiliary power supply circuit 10 operates normally.

It will be appreciated that in other embodiments, the relay U6 is replaced, for example, the base of the transistor is connected to the detection circuit 23, the emitter of the transistor is connected to node P4, and the collector of the transistor is grounded. When the detection circuit 23 detects that the first power supply 201 outputs the first voltage, a signal is output to control the triode to be turned on, and at this time, the node P1 is grounded, so that the second light emitting unit of the photo coupler U4 generates a large current, and further, the photo coupler U4 outputs a control signal to the voltage feedback terminal VFB of the second controller U2, thereby controlling the second controller U2 to stop working.

Based on the embodiments shown in fig. 4 to 7 described above, and when one of the first auxiliary power supply circuit or the second auxiliary power supply circuit is configured with the control circuit, the power supply module 100 can control one of the first auxiliary power supply circuit 10 and the second auxiliary power supply circuit 20 to operate normally and the other to stop operating when power is supplied simultaneously on the high-voltage side and the low-voltage side. According to the application, the primary winding of the first auxiliary power supply circuit 10 and the primary winding of the second auxiliary power supply circuit 20 are wound in one transformer, so that the cost of the power supply module can be reduced, and the competitiveness of a power supply product can be improved.

Referring to fig. 8, an embodiment of the present application further provides a power supply system 400, where the power supply system 400 includes the power module 100 in the foregoing embodiment, and the power module 100 may supply power to a load in the power supply system 400.

As shown in fig. 8, the power supply system 400 includes the power module 100 and at least one power consumption module, and fig. 8 illustrates three power consumption modules 400a, 400b, 400c as an example, and the number of power consumption modules may be more than three or less than three. The power module 100 is electrically connected to the power utilization modules 400a, 400b, 400c. The power supply module 100 is electrically connected to a first power supply 201 and a second power supply 202. In other words, the power module 100 may convert the first voltage provided by the first power source 201 and output a power supply voltage to power the power usage modules 400a, 400b, 400c. The power module 100 may also convert a second voltage provided by the second power source 202 and output a supply voltage to power the power usage modules 400a, 400b, 400c. It can be understood that the above power module can be various instrument and meter modules, and auxiliary power supply in a large power supply system (UPS), a charging pile system, an energy storage system and the like.

It will be evident to those skilled in the art that the application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Therefore, appropriate modifications and variations of the above embodiments should be included within the scope of the application as hereinafter claimed.

Claims

1. A power module, the power module comprising:

2. The power module of claim 1, wherein the power module comprises a power module,

The control circuit is connected with the second power supply and the first auxiliary power supply circuit, and is used for detecting whether the second power supply outputs the second voltage or not and controlling the first auxiliary power supply circuit to stop working when the first power supply outputs the first voltage and the second power supply outputs the second voltage.

3. The power module of claim 1, wherein the power module comprises a power module,

The control circuit is connected with the first power supply and the second auxiliary power supply circuit, and is used for detecting whether the first power supply outputs the first voltage or not and controlling the second auxiliary power supply circuit to stop working when the first power supply outputs the first voltage and the second power supply outputs the second voltage.

4. The power module of claim 2, wherein the power module comprises a power module,

The first auxiliary power supply circuit comprises a first switching tube, a first controller and a first feedback circuit, wherein the first feedback circuit is connected between the control circuit and the first controller, a first output end of the first power supply is connected with a first end of the first primary winding, the first switching tube is connected between a second end of the first primary winding and a second output end of the first power supply, the first controller is connected with the first switching tube, and the first controller is used for controlling the state of the first switching tube;

5. The power module of claim 4, wherein the power module further comprises a power supply module,

The control circuit comprises a first resistor, a second resistor and a first controllable precise voltage stabilizing source, wherein a first end and a second end of the first controllable precise voltage stabilizing source are connected with the first feedback circuit, an adjusting end of the first controllable precise voltage stabilizing source is connected with the second power supply through the first resistor, and an adjusting end of the first controllable precise voltage stabilizing source is connected with a second end of the first controllable precise voltage stabilizing source through the second resistor.

6. The power module of claim 4, wherein the power module further comprises a power supply module,

The control circuit comprises a detection circuit and a switching device, the detection circuit is connected with a second power supply, the detection circuit is used for detecting whether the second power supply outputs the second voltage, and the switching device is connected between the first feedback circuit and the detection circuit;

When the detection circuit detects that the second power supply outputs the second voltage, the detection circuit controls the switching device to be conducted or closed, and further controls the first feedback circuit to output a control signal to the first controller so that the first controller stops working.

7. The power module of claim 3, wherein the power module comprises a power module,

The second auxiliary power supply circuit comprises a second switching tube, a second controller and a second feedback circuit, wherein the second feedback circuit is connected between the control circuit and the second controller, a first output end of the second power supply is connected with a first end of the second primary winding, the second switching tube is connected between a second end of the second primary winding and a second output end of the second power supply, the second controller is connected with the second switching tube, and the second controller is used for controlling the state of the second switching tube;

8. The power module of claim 7, wherein the power module further comprises a power supply module,

The control circuit comprises a third resistor, a fourth resistor and a second controllable precise voltage stabilizing source, wherein a first end and a second end of the second controllable precise voltage stabilizing source are connected with the second feedback circuit, an adjusting end of the second controllable precise voltage stabilizing source is connected with the first power supply through the third resistor, and an adjusting end of the second controllable precise voltage stabilizing source is connected with a second end of the second controllable precise voltage stabilizing source through the fourth resistor.

9. The power module of claim 7, wherein the power module further comprises a power supply module,

The control circuit comprises a detection circuit and a switching device, the detection circuit is connected with the first power supply, the detection circuit is used for detecting whether the first power supply outputs the first voltage, and the switching device is connected between the second feedback circuit and the detection circuit;

When the detection circuit detects that the first power supply outputs the first voltage, the detection circuit controls the switching device to be conducted or closed, and further controls the second feedback circuit to output a control signal to the second controller so that the second controller stops working.

10. A power supply system comprising at least one power module and a power module according to any one of claims 1-9, the power module being configured to electrically connect to the at least one power module for powering the at least one power module.