Power supply module

Abstract

The utility model 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. According to the utility model, through multi-stage filtering and direct current output of different voltage levels, high-stability output of the power supply module can be ensured, and the requirement of each module in the CPS controller on voltage can be met at the same time.

Description

Technical Field

[0001] This utility model relates to the field of power supply technology, specifically to a power supply module. Background Technology

[0002] In related technologies, most power modules use multiple transformers to provide different operating power to various circuits or modules in the control and protective switching device (CPS), but their reliability and stability are low. Utility Model Content

[0003] In view of this, 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 the CPS in the related art.

[0004] This utility model embodiment provides a power module, which includes: an input unit, a power conversion power supply, and an output unit;

[0005] The input unit is used to filter and rectify the external AC power of the first voltage level and output DC power of the first voltage level.

[0006] A power conversion unit, connected to the input unit, is used to convert the input DC power of a first voltage level into DC power of different voltage levels suitable for the operation of the CPS controller.

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

[0008] In one 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 the external first voltage level AC power.

[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 ripple in the DC current of the first voltage level.

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

[0013] One end of the first resistor is connected to the UA, UB, or UC terminal of an external AC power supply of the first voltage level. The other end of the first resistor is connected to one end of the varistor, one end of the first capacitor, and the second pin of the choke coil. The other end of the varistor, the other end of the first capacitor, and the first pin of the choke coil are all connected to the N terminal of the external AC power supply of the first voltage level. The third pin of the choke coil is connected to the second pin of the rectifier bridge, and the fourth pin of the choke coil is connected to the first pin of the rectifier bridge.

[0014] In one optional embodiment, 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 connected to one end of the first inductor and the third pin of the rectifier bridge, respectively. The other end of the second capacitor is connected to one end of the second resistor, one end of the second inductor and the fourth pin of the rectifier bridge, respectively. The other end of the first inductor is connected to one end of the third capacitor and the power conversion unit, respectively. The other ends of the third capacitor, the second resistor and the second inductor are all connected to the power conversion unit.

[0016] In one optional embodiment, the power conversion unit includes: a fourth capacitor, a high-frequency transformer, a TVS diode, 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 diode, and the first pin of the power management subunit are all connected to the input unit; the other end of the fourth capacitor is connected to the fourth pin of the high-frequency transformer and the output unit, respectively; the other end of the TVS diode is connected to one end of the first diode, the other end of the first diode is 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 one alternative implementation, the secondary side of the high-frequency transformer includes multiple secondary windings, which output DC current at different voltage levels suitable for the operation of the CPS controller.

[0018] In one optional implementation, the output unit includes a multi-output circuit, with each output circuit corresponding to a secondary winding.

[0019] In one 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 filter circuit is connected to the corresponding secondary winding to filter out noise and ripple in DC current of different voltage levels, so as to obtain filtered DC current of different voltage levels.

[0021] The linear voltage regulator circuit is connected to the filter circuit and is used to convert the filtered DC power of different voltage levels into DC power of other voltage levels suitable for the operation of the CPS controller.

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

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

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

[0025] As can be seen from the above technical solutions, this utility model has the following advantages:

[0026] The power module of this utility model has a multi-stage filtering circuit formed by setting filtering circuits in both the front-end and rear-end circuits, which can ensure the high stability of the power supply module. At the same time, the flyback transformer outputs DC power of different voltage levels to meet the voltage requirements of different circuits or modules inside the CPS. Furthermore, by setting protection units, Zener diodes, and power management sub-units, the power module can achieve efficient and stable power supply under multiple protections, ensuring the normal operation of various circuits and modules in the control and protection switching device (CPS). Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a circuit schematic diagram of the power module provided in this embodiment of the utility model;

[0029] Figure 2 This is an enlarged circuit diagram of the input unit provided in this embodiment of the utility model;

[0030] Figure 3 This is an enlarged circuit diagram of the power conversion unit provided in this embodiment of the utility model;

[0031] Figure 4 This is an enlarged circuit diagram of the output unit provided in this embodiment of the utility model;

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

[0033] Figure 6 This is an enlarged circuit diagram of the protection unit provided in this embodiment of the utility model. Attached image description:

[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. Fifth capacitor; C142. Sixth capacitor; C149. Seventh capacitor; C134. Eighth capacitor; C135. Ninth capacitor; C146. Tenth capacitor; L10. Choke coil magnetic ring; L11. First inductor; L12. Second inductor; T5. High-frequency transformer; TVS1. TVS diode; Z5. First Zener diode; Z4. Second Zener diode; D28. First diode; D26. Second diode; D32. Third diode; D33. Fourth diode; U42. Linear regulator; U44. Power management subunit; U43. Optocoupler. Detailed Implementation

[0036] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0037] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0040] This utility model provides a power supply module suitable for providing a stable power supply for various electronic devices, especially for providing a stable power supply for the controller of a control and protective switching device (CPS).

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

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

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

[0044] Input unit 1 serves as the front-end circuit of power module 100. It performs pre-stage filtering in the front-end circuit, which can suppress electromagnetic interference, reduce ripple, and smooth waveforms, ensuring the stability of the current and voltage output by input unit 1. This, in turn, protects the subsequent circuits from external interference and improves the reliability and stability of the entire power module.

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

[0046] Output unit 3 serves as the downstream circuit of the power module. Downstream filtering is performed in the downstream 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] This utility model embodiment employs a multi-stage filtering method and DC power output at different voltage levels, which not only ensures the high stability of the power module's output but also meets the voltage requirements of different circuits or modules within the CPS controller.

[0048] In one alternative implementation, such as 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 filter circuit 101 is used to suppress electromagnetic interference generated in the external first voltage level AC power; the rectifier bridge D27 is used to convert the suppressed first voltage level AC power into first voltage level DC power; and the capacitor filter circuit is used to filter out the ripple in the first voltage level DC power.

[0050] The rectifier bridge D27 consists of four diodes connected in a bridge structure to form a rectifier bridge. The rectifier bridge D27 has four pins: the first and second pins are the input terminals, and the third and fourth pins are the output terminals. Its function is to convert alternating current into direct current through the unidirectional conduction characteristics of the diodes.

[0051] In one alternative embodiment, the electromagnetic filter circuit 101 includes: a first resistor R266, a varistor VR14, a first capacitor C136, and a choke ring L10.

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

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

[0054] This embodiment of the invention prevents overvoltage from damaging the rectifier bridge by setting a varistor before the rectifier bridge, and sets a choke coil magnetic ring to limit the flow of high-frequency current through its own reverse magnetic field, thereby reducing the radiation of EMI electromagnetic interference and suppressing electromagnetic interference.

[0055] In one optional embodiment, 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 connected to one end of the first inductor L11 and the third pin of the rectifier bridge D27, respectively. The other end of the second capacitor C137 is 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, respectively. The other end of the first inductor L11 is connected to one end of the third capacitor C138 and the power conversion unit 2, respectively. The other ends of the third capacitor C138, the second resistor R267, and 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 can be electrolytic capacitors.

[0058] This embodiment of the invention uses a capacitor filter circuit for pre-stage filtering. By utilizing the energy storage and discharge characteristics of the capacitor, the ripple component in the rectified DC power can be filtered out, making the output voltage of the input unit 1 smoother and more stable.

[0059] In one alternative implementation, such as Figure 3As shown, the power conversion unit 2 includes: a fourth capacitor C133, a high-frequency transformer T5, a TVS transistor 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 transistor TVS1, and the first pin of the power management subunit U44 are all connected to the input unit 1; the other end of the fourth capacitor C133 is connected to the fourth pin of the high-frequency transformer T5 and the output unit 3 respectively; the other end of the TVS transistor TVS1 is connected to one end of the first diode D28, the other end of the first diode D28 is connected to the second pin of the high-frequency transformer T5 and the fifth pin of the power management subunit respectively, the secondary side of the high-frequency transformer T5 is connected to the output unit 3, the first pin of the power management subunit U44 is connected to one end of the tenth capacitor C146, and the third pin of the power management subunit U44 is connected to the other end of the tenth capacitor C146.

[0061] In one alternative implementation, the secondary side of the high-frequency transformer T5 includes multiple secondary windings, which output DC current at different voltage levels suitable for the operation of the CPS controller.

[0062] As an example, there can be four secondary windings, which output two 5V DC power supplies and two 24V DC power supplies respectively.

[0063] As an example, the high-frequency transformer T5 has 10 pins. The primary side corresponds to pins 1 and 2, and the secondary side has four secondary windings. The first secondary winding corresponds to pins 4 and 5, the second secondary winding corresponds to pins 6 and 7, the third secondary winding corresponds to pins 9 and 10, and the fourth secondary winding corresponds to pins 11 and 12.

[0064] In one optional implementation, one end of the fourth capacitor C133, the first pin of the high-frequency transformer T5, one end of the TVS transistor TVS1, and the first pin of the power management subunit U44 are all connected to the first inductor L11 and the third capacitor C138; the other end of the fourth capacitor C133 is connected to the fourth pin of the high-frequency transformer T5 and the output unit 3, respectively; the other end of the TVS transistor TVS1 is connected to one end of the first diode D28, the other end of the first diode D28 is connected to the second pin of the high-frequency transformer T5 and the fifth pin of the power management subunit, all 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 subunit U44 is connected to one end of the tenth capacitor, the third pin of the power management subunit U44 is connected to the other end of the tenth capacitor, and the first pin of the power management subunit U44 is also 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, respectively.

[0065] In one alternative implementation, the secondary side of the high-frequency transformer T5 includes multiple secondary windings, which output DC current at different voltage levels suitable for the operation of the CPS controller.

[0066] In this embodiment of the invention, a flyback transformer is used to transfer electrical energy from the primary winding to the secondary winding through the principle of electromagnetic induction, thereby realizing energy transfer. Furthermore, since the flyback transformer has the characteristic of electrical isolation, it can effectively isolate the input unit and the output unit, preventing high voltage from directly acting on the output unit, thus protecting the components in the CPS from damage.

[0067] Furthermore, by providing multiple different voltage levels through a single transformer, the number of transformers can be reduced, thereby lowering the complexity and maintenance costs of the power module.

[0068] In one alternative implementation, such as Figure 4 As shown, the output unit 3 includes a multi-output circuit 301, with each output circuit connected to a secondary winding.

[0069] In one alternative implementation, such as 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. The filter circuit 3011 is used to filter out noise and ripple in DC power of different voltage levels to obtain DC power of different voltage levels after filtering. The linear 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 one optional implementation, the filter circuit 3011 consists of an electrolytic capacitor, a general-purpose capacitor, and a Zener diode connected in parallel, followed by a diode connected in series. The general-purpose capacitor can also be omitted.

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

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

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

[0075] As an example, suppose the secondary windings output 5V and 24V DC, respectively, suitable for the voltage requirements of various circuits or modules within the CPS. When another circuit or module within the CPS requires 3.3V, the voltage output from the secondary winding of the high-frequency transformer T5 cannot meet the requirement. In this case, the linear 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 fluctuations.

[0076] In one optional embodiment, the power module 100 further includes a protection unit 4;

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

[0078] The protection unit 4 monitors the voltage, current or temperature values ​​fed back by the output circuit 301 in real time. When the voltage, current or temperature value 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, which can quickly disconnect the connection between the input unit and the output unit when a short circuit occurs in the output circuit 301, protecting 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 based on the voltage value output by the output circuit 301.

[0081] In one alternative implementation, such as Figure 6As shown, protection unit 4 includes: power management subunit U44, tenth capacitor C146, optocoupler U43, fourth resistor R268, fifth resistor R269, and second Zener diode Z4. The first pin of power management subunit U44 is connected to input unit 1, power conversion unit 2, and one end of tenth capacitor C146. The other end of tenth capacitor C146 is connected to the third pin of power management subunit U44 and one end of optocoupler U43. One end of optocoupler U43 is also connected to the fourth pin of power management subunit U44. The other end of optocoupler U43 is connected to one end of fourth resistor R268 and fifth resistor R269. The other ends of fourth resistor R268 and optocoupler U43 are also grounded. The other end of fifth resistor R269 is also connected to the second Zener diode Z4.

[0082] It should be noted that the power management subunit U44 and the tenth capacitor C146 are shared by the power conversion unit 2 and the protection unit 4. They can be part of the power conversion unit 2 or the protection unit 4.

[0083] In one alternative implementation, the power management subunit U44 is a high-frequency offline transfer switch.

[0084] This utility model embodiment uses an offline high-frequency conversion switch to achieve efficient voltage conversion, reduce energy loss, and improve the power supply efficiency of the entire power module. At the same time, it can also achieve precise control of the power load, i.e., the various circuits or modules of the CPS, to meet the voltage requirements of different circuits or modules, thereby improving 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, preventing overload or short circuit faults from damaging the CPS and power module itself, thus protecting the safe operation of the equipment.

[0086] Although the exemplary embodiments and their advantages have been described in detail, those skilled in the art can make various changes, substitutions and modifications to these embodiments without departing from the spirit and scope of protection of this utility model, and such modifications and variations all fall within the scope defined by the present invention.

Claims

1. A power module, characterized in that, The power module includes: an input unit, a power conversion power supply, and an output unit; The input unit is used to filter and rectify the external AC power of the first voltage level and output DC power of the first voltage level. A power conversion unit, connected to the input unit, is used to convert the input DC power of a first voltage level into DC power of different voltage levels suitable for the operation of the CPS controller. The output unit, connected to the power conversion unit, is used to filter DC power of different voltage levels and output filtered DC power of different voltage levels.

2. The power module according to claim 1, characterized in that, The input unit includes: 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 the external first voltage level AC power. 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 ripple in the DC current of the first voltage level.

3. The power module according to claim 2, characterized in that, The electromagnetic filter circuit includes: a first resistor, a varistor, a first capacitor, and a choke magnetic ring; One end of the first resistor is connected to the UA, UB, or UC terminal of an external AC power supply of the first voltage level. The other end of the first resistor is connected to one end of the varistor, one end of the first capacitor, and the second pin of the choke coil. The other end of the varistor, the other end of the first capacitor, and the first pin of the choke coil are all connected to the N terminal of the external AC power supply of the first voltage level. The third pin of the choke coil is connected to the second pin of the rectifier bridge, and the fourth pin of the choke coil 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 connected to one end of the first inductor and the third pin of the rectifier bridge, respectively. The other end of the second capacitor is connected to one end of the second resistor, one end of the second inductor and the fourth pin of the rectifier bridge, respectively. The other end of the first inductor is connected to one end of the third capacitor and the power conversion unit, respectively. The other ends of the third capacitor, the second resistor and 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 diode, 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 diode, and the first pin of the power management subunit are all connected to the input unit; the other end of the fourth capacitor is connected to the fourth pin of the high-frequency transformer and the output unit, respectively; the other end of the TVS diode is connected to one end of the first diode, the other end of the first diode is 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.

6. The power module according to claim 5, characterized in that, The secondary side of the high-frequency transformer includes multiple secondary windings, and the multiple secondary windings output DC current at 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, each of which is 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 regulator circuit; the target output circuit is any one of the multiple output circuits. The filter circuit is connected to the corresponding secondary winding to filter out noise and ripple in DC current of different voltage levels, so as to obtain filtered DC current of different voltage levels. The linear voltage regulator circuit is connected to the filter circuit and is used to convert the filtered DC power of different voltage levels into DC power 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 connected to the power conversion unit and at least one output circuit, respectively, and is used to monitor the voltage, current or temperature output by the output circuit, and to disconnect the connection between the input unit and the output unit when the voltage, current or temperature is abnormal.

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

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