Power supply module

Abstract

The invention relates to the technical field of power supply, and discloses a power supply module, which comprises an input unit, a power conversion power supply and an output unit, the input unit is used for filtering and rectifying alternating current of a first external voltage level and outputting direct current of the first voltage level; the power supply conversion unit is connected with the input unit and is used for converting the input direct current of the first voltage level into direct current of different voltage levels suitable for working of the CPS controller; and the output unit is connected with the power supply conversion unit and is used for respectively filtering the direct current of different voltage levels and outputting the filtered direct current of different voltage levels. Through multi-stage filtering and direct current output of different voltage levels, high-stability output of the power supply module can be ensured, and meanwhile, the requirement of each module in the CPS controller for voltage can be met.

Description

Technical Field

[0001] The invention relates to the technical field of power supply, and in particular to a power supply module. Background Art

[0002] In the related art, most power modules only use multiple transformers to provide different working power supplies for various circuits or modules in a control and protective switching device (CPS for short), but their reliability and stability are low. Summary of the invention

[0003] In view of this, an embodiment of the present invention provides a power supply module to solve the technical problem of low stability and reliability when the power supply module supplies power to various circuits or modules of a CPS in the related art.

[0004] An embodiment of the present invention provides a power module, the power module comprising: an input unit, a power conversion power supply and an output unit;

[0005] An input unit, used for filtering and rectifying external alternating current of a first voltage level, and outputting direct current of a first voltage level;

[0006] a power conversion unit connected to the input unit and configured to convert the input direct current of a first voltage level into direct current of a different voltage level suitable for operation of the CPS controller;

[0007] The output unit is connected to the power conversion unit and is used to filter the direct current of different voltage levels respectively and output the filtered direct current of different voltage levels.

[0008] In an optional implementation, the input unit includes: an electromagnetic filter circuit, a rectifier bridge, and a capacitor filter circuit connected in sequence;

[0009] The electromagnetic filter circuit is used to suppress electromagnetic interference generated by external alternating current of the first voltage level;

[0010] The rectifier bridge is used to convert the suppressed alternating current of the first voltage level into direct current of the first voltage level;

[0011] The capacitor filter circuit is used to filter out ripples in direct current of the first voltage level.

[0012] In an optional implementation, the electromagnetic filter circuit includes: a first resistor, a varistor, a first capacitor and a choke coil magnetic ring;

[0013] One end of the first resistor is connected to the UA end, UB end or UC end of the external alternating current of the first voltage level, and the other end of the first resistor is respectively connected to one end of the varistor, one end of the first capacitor and the second pin of the choke magnetic ring; the other end of the varistor, the other end of the first capacitor and the first pin of the choke magnetic ring are all connected to the N end of the external alternating current of the first voltage level, the third pin of the choke magnetic ring is connected to the second pin of the rectifier bridge, and the fourth pin of the choke magnetic ring is connected to the first pin of the rectifier bridge.

[0014] In an optional implementation, the capacitor filter circuit includes: a second capacitor, a third capacitor, a second resistor, a first inductor, and a second inductor;

[0015] One end of the second capacitor is respectively connected to one end of the first inductor and the third pin of the rectifier bridge, the other end of the second capacitor is respectively connected to one end of the second resistor, one end of the second inductor, and the fourth pin of the rectifier bridge, the other end of the first inductor is respectively connected to one end of the third capacitor and the power conversion unit, and the other end of the third capacitor, the other end of the second resistor, and the other end of the second inductor are all connected to the power conversion unit.

[0016] In an optional embodiment, the power conversion unit includes: a fourth capacitor, a high-frequency transformer, a TVS tube, a first diode, a tenth capacitor and a power management subunit; one end of the fourth capacitor, a first pin of the high-frequency transformer, one end of the TVS tube, and a first pin of the power management subunit are all connected to the input unit; the other end of the fourth capacitor is respectively connected to the fourth pin of the high-frequency transformer and the output unit; the other end of the TVS tube is connected to one end of the first diode, and the other end of the first diode is respectively connected to the second pin of the high-frequency transformer and the fifth pin of the power management subunit, the secondary side of the high-frequency transformer is connected to the output unit, the first pin of the power management subunit is connected to one end of the tenth capacitor, and the third pin of the power management subunit is connected to the other end of the tenth capacitor.

[0017] In an optional implementation, the secondary side of the high-frequency transformer includes a plurality of secondary windings, and the plurality of secondary windings correspondingly output direct current of different voltage levels suitable for the operation of the CPS controller.

[0018] In an optional implementation, the output unit includes multiple output circuits, and each output circuit is correspondingly connected to a secondary winding.

[0019] In an optional implementation, each output circuit includes a filter circuit; the target output circuit includes a linear voltage regulator circuit; the target output circuit is any one of the multiple output circuits;

[0020] The filtering circuit is connected to the corresponding secondary winding and is used to filter out noise and ripple in direct current of different voltage levels to obtain filtered direct current of different voltage levels;

[0021] The linear voltage stabilizing circuit is connected to the filtering circuit and is used to convert the filtered direct current of different voltage levels into direct current of other voltage levels suitable for the operation of the CPS controller.

[0022] In an optional implementation, the power module further includes: a protection unit;

[0023] The protection unit is respectively connected to the power conversion unit and at least one output circuit, and is used to monitor the voltage value, current value or temperature output by the output circuit, and cut off the connection between the input unit and the output unit when the voltage value, current value or temperature is abnormal.

[0024] In an optional implementation, the protection unit is further configured to perform pulse width modulation on the high-frequency transformer according to a voltage value output by the output circuit.

[0025] It can be seen from the above technical solutions that the present invention has the following advantages:

[0026] The power module of the embodiment of the present invention is provided with a filter circuit in both the front-stage circuit and the back-stage circuit to form a multi-stage filter circuit, which can ensure high-stability power supply of the power module. At the same time, the flyback transformer outputs direct current of different voltage levels to meet the voltage requirements of different circuits or modules inside the CPS. In addition, by providing a protection unit, a voltage regulator diode, and a power management subunit, etc., efficient and stable power supply can be achieved under the premise of multiple protections for the power module, thereby ensuring the normal operation of each circuit and module in the control and protection switch (CPS). BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 is a circuit schematic diagram of a power module provided by an embodiment of the present invention;

[0029] Figure 2 is an enlarged diagram of the circuit principle of the input unit provided in an embodiment of the present invention;

[0030] Figure 3 is an enlarged diagram of the circuit principle of the power conversion unit provided by an embodiment of the present invention;

[0031] Figure 4 is an enlarged diagram of the circuit principle of the output unit provided by an embodiment of the present invention;

[0032] Figure 5 is an enlarged diagram of the circuit principle of another output unit provided by an embodiment of the present invention;

[0033] Figure 6 It is an enlarged diagram of the circuit principle of the protection unit provided in an embodiment of the present invention. Description of the drawings:

[0035] 1. Input unit; 101. Electromagnetic filter circuit; 102. Capacitor filter circuit; 2. Power conversion unit; 3. Output unit; 301. Output circuit; 3011. Filter circuit; 3012. Linear voltage regulator circuit; 4. Protection unit; D27. Rectifier bridge; R266. First resistor; R267. Second resistor; R270. Third resistor; R268. Fourth resistor; R269. Fifth resistor; VR14. Varistor; C136. First capacitor; C137. Second capacitor; C138. Third capacitor; C133. Fourth capacitor; C14 1. The fifth capacitor; C142, the sixth capacitor; C149, the seventh capacitor; C134, the eighth capacitor; C135, the ninth capacitor; C146, the tenth capacitor; L10, the choke magnetic ring; L11, the first inductor; L12, the second inductor; T5, the high-frequency transformer; TVS1, the TVS tube; Z5, the first voltage-stabilizing diode; Z4, the second voltage-stabilizing diode; D28, the first diode; D26, the second diode; D32, the third diode; D33, the fourth diode; U42, the linear regulator; U44, the power management subunit; U43, the optocoupler. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] An embodiment of the present invention provides a power supply module, which is suitable for providing a stable power supply for various electronic devices, and is particularly suitable for providing a stable power supply for a controller of a control and protective switching device (CPS).

[0041] Figure 1 is an equivalent circuit diagram of a power module according to an embodiment of the present invention, such as Figure 1 As shown, an embodiment of the present invention provides a power module, including: an input unit 1, a power conversion unit 2 and an output unit 3.

[0042] Specifically, the input unit 1 is used to filter and rectify the external alternating current of the first voltage level, and output direct current of the first voltage level; the power conversion unit 2 is connected to the input unit 1, and the power conversion unit 2 is used to convert the input direct current of the first voltage level into direct current of a different voltage level suitable for the operation of the CPS controller; the output unit 3 is connected to the power conversion unit 2, and the output unit 3 is used to filter the direct current of different voltage levels respectively, and output the filtered direct current of different voltage levels.

[0043] The external AC power is used to provide power input for the power module, and may be a wide range AC voltage input. In one example, the external AC power may be 220V 50Hz AC mains.

[0044] The input unit 1 serves as the front-stage circuit of the power module 100. Pre-stage filtering is performed in the front-stage circuit to suppress electromagnetic interference, reduce ripples, and smooth the waveform, thereby ensuring the stability of the current and voltage output by the input unit 1, thereby protecting the subsequent circuit from external interference and improving the reliability and stability of the entire power module.

[0045] The power conversion unit 2 converts the input direct current of the first voltage level into direct current of multiple voltage levels, which can meet the voltage requirements of different circuits or modules inside the CPS controller.

[0046] The output unit 3 is used as the post-stage circuit of the power module. Post-stage filtering is performed in the post-stage circuit to further filter out high-frequency harmonics and electromagnetic interference in the DC power, thereby improving the power supply stability and reliability of the power module and ensuring the normal operation of the CPS controller.

[0047] The embodiment of the present invention adopts a multi-stage filtering method and DC output of different voltage levels, which can not only ensure the high stability output of the power module, but also meet the voltage requirements of different circuits or modules inside the CPS controller.

[0048] In an optional embodiment, if Figure 2 As shown, the input unit 1 includes: an electromagnetic filter circuit 101, a rectifier bridge D27 and a capacitor filter circuit 102 connected in sequence.

[0049] Specifically, the electromagnetic filtering circuit 101 is used to suppress the electromagnetic interference generated in the external first voltage level alternating current; the rectifier bridge D27 is used to convert the suppressed first voltage level alternating current into the first voltage level direct current; the capacitor filtering circuit is used to filter out the ripple in the first voltage level direct current.

[0050] Among them, the rectifier bridge D27 is composed of four diodes, which are connected into a bridge structure to form a rectifier bridge. The rectifier bridge D27 includes four pins, the first pin and the second pin are used as input ends, and the third pin and the fourth pin are used as output ends. Its function is to convert alternating current into direct current through the unidirectional conduction characteristics of the diode.

[0051] In an optional implementation, the electromagnetic filter circuit 101 includes: a first resistor R266, a varistor VR14, a first capacitor C136 and a choke magnetic ring L10.

[0052] Specifically, one end of the first resistor R266 is connected to the UA end, UB end or UC end of the external first voltage level alternating current, and the other end of the first resistor R266 is respectively connected to one end of the varistor VR14, one end of the first capacitor C136 and the second pin of the choke magnetic ring L10; the other end of the varistor VR14, the other end of the first capacitor C136 and the first pin of the choke magnetic ring L10 are all connected to the N end of the external first voltage level alternating current, the third pin of the choke magnetic ring L10 is connected to the second pin of the rectifier bridge D27, and the fourth pin of the choke magnetic ring L10 is connected to the first pin of the rectifier bridge D27.

[0053] Among them, in the external alternating current of the first voltage level, the UA terminal, UB terminal and UC terminal represent the measurement points of the A phase, B phase and C phase voltages respectively (equivalent to the live wire), which are the high potential terminals; the N terminal represents the neutral point (equivalent to the zero wire), which is the low potential terminal. Therefore, the first voltage level can be the voltage value between the A phase, B phase or C phase and the neutral point.

[0054] The embodiment of the present invention can prevent overvoltage from damaging the rectifier bridge by arranging a varistor before the rectifier bridge, and can also set a choke magnetic ring to limit the flow of high-frequency current through the reverse magnetic field generated by itself, thereby reducing the radiation of EMI electromagnetic interference and having an inhibitory effect on electromagnetic interference.

[0055] In an optional implementation, the capacitor filter circuit 103 includes: a second capacitor C137, a third capacitor C138, a second resistor R267, a first inductor L11, and a second inductor L12.

[0056] Specifically, one end of the second capacitor C137 is respectively connected to one end of the first inductor L11 and the third pin of the rectifier bridge D27, the other end of the second capacitor C137 is respectively connected to one end of the second resistor R267, one end of the second inductor L12, and the fourth pin of the rectifier bridge D27, the other end of the first inductor L11 is respectively connected to one end of the third capacitor C138 and the power conversion unit 2, the other end of the third capacitor C138, the other end of the second resistor R267, and the other end of the second inductor L12 are all connected to the power conversion unit 2.

[0057] As an example, the second capacitor C137 and the third capacitor C138 may be electrolytic capacitors.

[0058] The embodiment of the present invention adopts a capacitor filter circuit for pre-stage filtering. Through the energy storage and discharge characteristics of the capacitor, the ripple component in the rectified direct current can be filtered out, so that the output voltage of the input unit 1 is smoother and more stable.

[0059] In an optional embodiment, if Figure 3As shown, the power conversion unit 2 includes: a fourth capacitor C133, a high-frequency transformer T5, a TVS tube TVS1, a first diode D28, a tenth capacitor C146 and a power management subunit U44;

[0060] Specifically, one end of the fourth capacitor C133, the first pin of the high-frequency transformer T5, one end of the TVS tube TVS1, and the first pin of the power management sub-unit U44 are all connected to the input unit 1; the other end of the fourth capacitor C133 is respectively connected to the fourth pin of the high-frequency transformer T5 and the output unit 3; the other end of the TVS tube TVS1 is connected to one end of the first diode D28, and the other end of the first diode D28 is respectively connected to the second pin of the high-frequency transformer T5 and the fifth pin of the power management sub-unit, the secondary side of the high-frequency transformer T5 is connected to the output unit 3, the first pin of the power management sub-unit U44 is connected to one end of the tenth capacitor C146, and the third pin of the power management sub-unit U44 is connected to the other end of the tenth capacitor C146.

[0061] In an optional implementation, the secondary side of the high-frequency transformer T5 includes a plurality of secondary windings, and the plurality of secondary windings correspondingly output direct current of different voltage levels suitable for the operation of the CPS controller.

[0062] As an example, the plurality of secondary windings may be four, which respectively output two 5V DC power and two 24V DC power.

[0063] As an example, the high-frequency transformer T5 includes 10 pins, the primary side corresponds to the first pin and the second pin, the secondary side includes four secondary windings, the first secondary winding corresponds to the fourth pin and the fifth pin, the second secondary winding corresponds to the sixth pin and the seventh pin, the third secondary winding corresponds to the ninth pin and the tenth pin, and the fourth secondary winding corresponds to the eleventh pin and the twelfth pin.

[0064] In an optional embodiment, one end of the fourth capacitor C133, the first pin of the high-frequency transformer T5, one end of the TVS tube TVS1, and the first pin of the power management sub-unit U44 are all connected to the first inductor L11 and the third capacitor C138; the other end of the fourth capacitor C133 is respectively connected to the fourth pin of the high-frequency transformer T5 and the output unit 3; the other end of the TVS tube TVS1 is connected to one end of the first diode D28, and the other end of the first diode D28 is respectively connected to the second pin of the high-frequency transformer T5 and the fifth pin of the power management sub-unit, all the pins on the secondary side of the high-frequency transformer T5 are connected to the output unit 3, the first pin of the power management sub-unit U44 is connected to one end of the tenth capacitor, the third pin of the power management sub-unit U44 is connected to the other end of the tenth capacitor, and the first pin of the power management sub-unit U44 is also respectively connected to the other end of the third capacitor C138, the other end of the second resistor R267, and the other end of the second inductor L12.

[0065] In an optional implementation, the secondary side of the high-frequency transformer T5 includes a plurality of secondary windings, and the plurality of secondary windings correspondingly output direct current of different voltage levels suitable for the operation of the CPS controller.

[0066] Among them, the embodiment of the present invention adopts a flyback transformer, which transmits the electric energy of the primary winding to the secondary winding through the principle of electromagnetic induction to achieve energy transmission, and because the flyback transformer has the characteristic of electrical isolation, it can effectively isolate the input unit and the output unit to prevent high voltage from directly acting on the output unit, thereby protecting the components in the CPS from damage.

[0067] In addition, by providing multiple voltage levels through one transformer, the number of transformers can be reduced, thereby reducing the complexity and maintenance cost of the power module.

[0068] In an optional embodiment, if Figure 4 As shown, the output unit 3 includes a multi-channel output circuit 301, and each channel of the output circuit is correspondingly connected to a secondary winding.

[0069] In an optional embodiment, if Figure 5 As shown, each output circuit includes a filter circuit 3011; the target output circuit also includes a linear voltage regulator circuit 3012; the target output circuit is any one of the multiple output circuits;

[0070] The filter circuit 3011 is connected to the corresponding secondary winding, and is used to filter out noise and ripples in DC power of different voltage levels to obtain DC power of different voltage levels after filtering; the linear voltage regulator circuit 3012 is connected to the filter circuit 3011, and is used to convert the DC power of different voltage levels after filtering into DC power of other voltage levels suitable for the operation of the CPS controller.

[0071] In an optional implementation, the filter circuit 3011 is composed of an electrolytic capacitor, a common capacitor and a voltage regulator diode connected in parallel, and then a diode connected in series, wherein the common capacitor can also be omitted.

[0072] As an example, taking one of the output circuits 301 as an example, the filtering circuit 3011 includes a second diode D26, a fifth capacitor C141, a sixth capacitor C142 and a first voltage regulator diode Z5, the fifth capacitor C141 is an electrolytic capacitor, the sixth capacitor C142 is an ordinary capacitor, one end of the second diode D26 is connected to the fifth pin of the high-frequency transformer T5, the other end of the second diode D26 is respectively connected to the fifth capacitor C141, the sixth capacitor C142 and one end of the first voltage regulator diode Z5, and the other end of the second diode D26 is also connected to the linear voltage regulator circuit 3012; the other ends of the fifth capacitor C141, the sixth capacitor C142 and the first voltage regulator diode Z5 are all connected to the fourth pin of the high-frequency transformer T5 and the linear voltage regulator circuit 3012, and the other ends of the fifth capacitor C141, the sixth capacitor C142 and the first voltage regulator diode Z5 are also grounded.

[0073] It should be noted that the connection relationship of the filter circuit 3011 in the output circuit 301 of other paths is the same as that of the above example, the only difference is the pin connection method of the high-frequency transformer T5 and whether the ordinary capacitor is omitted, which will not be repeated here. The detailed connection method is as follows Figure 5 shown.

[0074] In an optional implementation, the linear voltage regulator circuit 3012 includes a seventh capacitor C149, a third resistor R270, a third diode D32, a fourth diode D33, a linear voltage regulator U42, an eighth capacitor C134, and a ninth capacitor C135. One end of the seventh capacitor C149 is connected to one end of the third resistor R270 and one end of the fourth diode D33 respectively; the other end of the seventh capacitor C149 is connected to the filter circuit 3011, and the other end of the seventh capacitor C149 is also grounded; the other end of the third resistor R270 is connected to the filter circuit 3011 and one end of the third diode D32 respectively, and the other end of the third diode D32 is connected to the other end of the fourth diode and V of the linear voltage regulator U42 respectively. IN The GND pin of the linear regulator U42 is connected to ground, and the V OUT The pins are respectively connected to one end of the eighth capacitor C134 and the ninth capacitor C135, and the other ends of the eighth capacitor C134 and the ninth capacitor C135 are grounded.

[0075] As an example, assume that the secondary winding outputs 5V and 24V DC respectively, which are suitable for the voltage requirements of various circuits or modules in the CPS. When the voltage required by other circuits or modules in the CPS is 3.3V, the voltage output by the secondary winding of the high-frequency transformer T5 cannot meet the requirement. At this time, the linear voltage regulator circuit 3012 reduces the 5V voltage to the required level to provide a stable output voltage and current, ensuring that the 3.3V load device can operate normally without being affected by voltage changes.

[0076] In an optional implementation, the power module 100 further includes: a protection unit 4;

[0077] The protection unit 4 is respectively connected to the power conversion unit 2 and at least one output circuit 301, and is used to monitor the voltage value, current value or temperature output by the output circuit 301, and cut off the connection between the input unit 1 and the output unit 3 when the voltage value, current value or temperature is abnormal.

[0078] Among them, the protection unit 4 monitors the voltage value, current value or temperature fed back by the output circuit 301 in real time. When the voltage value, current value or temperature exceeds the set value, it is determined to be abnormal. At this time, the connection between the input unit 1 and the output unit 3 is automatically cut off to prevent the CPS from being damaged due to overcurrent.

[0079] In some optional implementations, the protection unit 4 also provides a short-circuit protection function. When a short circuit occurs in the output circuit 301, the connection between the input unit and the output unit can be quickly restored to protect the CPS from damage.

[0080] In an optional implementation, the protection unit 4 is further configured to perform pulse width modulation on the high-frequency transformer T5 according to the voltage value output by the output circuit 301 .

[0081] In an optional embodiment, if Figure 6 As shown, the protection unit 4 includes: a power management subunit U44, a tenth capacitor C146, an optical coupler U43, a fourth resistor R268, a fifth resistor R269, and a second voltage stabilizing diode Z4. The first pin of the power management subunit U44 is respectively connected to the input unit 1, the power conversion unit 2, and one end of the tenth capacitor C146, and the other end of the tenth capacitor C146 is respectively connected to the third pin of the power management subunit U44 and one end of the optical coupler U43; one end of the optical coupler U43 is also connected to the fourth pin of the power management subunit U44, and the other end of the optical coupler U43 is respectively connected to one end of the fourth resistor R268 and the fifth resistor R269, and the other end of the fourth resistor R268 and the other end of the optical coupler U43 are also grounded at the same time, and the other end of the fifth resistor R269 is also connected to the second voltage stabilizing diode Z4.

[0082] It should be noted that the power management subunit U44 and the tenth capacitor C146 are common parts of the power conversion unit 2 and the protection unit 4 , and can be used as both a part of the power conversion unit 2 and a part of the protection unit 4 .

[0083] In an optional implementation, the power management subunit U44 is a high-frequency offline conversion switch.

[0084] The embodiment of the present invention can realize efficient voltage conversion, reduce energy loss, and improve the power supply efficiency of the entire power module by adopting an offline high-frequency conversion switch. At the same time, it can also realize precise control of the power load, that is, each circuit or module of the CPS, meet the voltage requirements of different circuits or modules, and improve the flexibility and reliability of the power module.

[0085] At the same time, the use of offline high-frequency transfer switches can quickly cut off the circuit, prevent overload or short circuit and other faults from causing damage to the CPS and the power module itself, and protect the safe operation of the equipment.

[0086] Although example embodiments and their advantages have been described in detail, those skilled in the art may make various changes, substitutions and modifications to these embodiments without departing from the spirit and defined scope of the present invention, and such modifications and variations are all within the defined scope.

Claims

1. A power module, characterized in that: The power module comprises: an input unit, a power conversion power supply and an output unit; An input unit, used for filtering and rectifying external alternating current of a first voltage level, and outputting direct current of a first voltage level; a power conversion unit connected to the input unit and configured to convert the input direct current of a first voltage level into direct current of a different voltage level suitable for operation of the CPS controller; The output unit is connected to the power conversion unit and is used to filter the direct current of different voltage levels respectively and output the filtered direct current of different voltage levels.

2. The power module according to claim 1, characterized in that: The input unit comprises: an electromagnetic filter circuit, a rectifier bridge and a capacitor filter circuit connected in sequence; The electromagnetic filter circuit is used to suppress electromagnetic interference generated by external alternating current of the first voltage level; The rectifier bridge is used to convert the suppressed alternating current of the first voltage level into direct current of the first voltage level; The capacitor filter circuit is used to filter out ripples in direct current of the first voltage level.

3. The power module according to claim 2, characterized in that: The electromagnetic filter circuit comprises: a first resistor, a varistor, a first capacitor and a choke coil magnetic ring; One end of the first resistor is connected to the UA end, UB end or UC end of the external alternating current of the first voltage level, and the other end of the first resistor is respectively connected to one end of the varistor, one end of the first capacitor and the second pin of the choke magnetic ring; the other end of the varistor, the other end of the first capacitor and the first pin of the choke magnetic ring are all connected to the N end of the external alternating current of the first voltage level, the third pin of the choke magnetic ring is connected to the second pin of the rectifier bridge, and the fourth pin of the choke magnetic ring is connected to the first pin of the rectifier bridge.

4. The power module according to claim 2 or 3, characterized in that: The capacitor filter circuit includes: a second capacitor, a third capacitor, a second resistor, a first inductor, and a second inductor; One end of the second capacitor is respectively connected to one end of the first inductor and the third pin of the rectifier bridge, the other end of the second capacitor is respectively connected to one end of the second resistor, one end of the second inductor, and the fourth pin of the rectifier bridge, the other end of the first inductor is respectively connected to one end of the third capacitor and the power conversion unit, and the other end of the third capacitor, the other end of the second resistor, and the other end of the second inductor are all connected to the power conversion unit.

5. The power module according to claim 1, characterized in that: The power conversion unit includes: a fourth capacitor, a high-frequency transformer, a TVS tube, a first diode, a tenth capacitor and a power management subunit; One end of the fourth capacitor, the first pin of the high-frequency transformer, one end of the TVS tube, and the first pin of the power management sub-unit are all connected to the input unit; the other end of the fourth capacitor is respectively connected to the fourth pin of the high-frequency transformer and the output unit; the other end of the TVS tube is connected to one end of the first diode, and the other end of the first diode is respectively connected to the second pin of the high-frequency transformer and the fifth pin of the power management sub-unit, the secondary side of the high-frequency transformer is connected to the output unit, the first pin of the power management sub-unit is connected to one end of the tenth capacitor, and the third pin of the power management sub-unit is connected to the other end of the tenth capacitor.

6. The power module according to claim 5, characterized in that: The secondary side of the high-frequency transformer includes a plurality of secondary windings, and the plurality of secondary windings correspondingly output direct current of different voltage levels suitable for the operation of the CPS controller.

7. The power module according to claim 6, characterized in that: The output unit includes multiple output circuits, and each output circuit is correspondingly connected to a secondary winding.

8. The power module according to claim 7, characterized in that: Each output circuit includes a filter circuit; the target output circuit includes a linear voltage stabilization circuit; the target output circuit is any one of the multiple output circuits; The filtering circuit is connected to the corresponding secondary winding and is used to filter out noise and ripple in direct current of different voltage levels to obtain filtered direct current of different voltage levels; The linear voltage stabilizing circuit is connected to the filtering circuit and is used to convert the filtered direct current of different voltage levels into direct current of other voltage levels suitable for the operation of the CPS controller.

9. The power module according to claim 8, characterized in that: The power module further includes: a protection unit; The protection unit is respectively connected to the power conversion unit and at least one output circuit, and is used to monitor the voltage value, current value or temperature output by the output circuit, and cut off the connection between the input unit and the output unit when the voltage value, current value or temperature is abnormal.

10. The power module according to claim 9, characterized in that: The protection unit is further used to perform pulse width modulation on the high-frequency transformer according to the voltage value output by the output circuit.

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