Power module, electronic equipment, motor controller and vehicle

Abstract

The utility model discloses a power module, electronic equipment, a motor controller and a vehicle. The power module comprises a shell, a bridge power device and a filter capacitor. The bridge power device and the filter capacitor are packaged in the shell, the filter capacitor is connected with the bridge power device, and the filter capacitor can be used for reducing high-frequency pulse signals generated in the switching-on or switching-off process of the bridge power device. The electrical connection between the filter capacitor and the bridge power device can provide a short filter path for an interference signal generated by the power device, so that the stray inductance in a loop is reduced, and the switching loss of the power device can be effectively reduced. Besides, the filter capacitor and the bridge power device can be packaged in the shell, so that interference signals generated by the power device are limited in the power module, the electromagnetic interference of the interference signals on cables and circuit boards outside the power module is reduced, and the electromagnetic compatibility of the electronic equipment is effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of power modules, and more specifically, to a power module, an electronic device, a motor controller and a vehicle. Background Art

[0002] Power module is a kind of electrical equipment with high reliability and high efficiency, which is widely used in many fields, including industrial control, power electronics, new energy, automotive electronics, etc. It has the advantages of fast response speed, high precision and long life. The switching action of power devices at work will generate large electromagnetic interference. The high-frequency pulse signal generated during high-speed opening and closing has a large current and voltage change rate. The huge voltage change will generate pulse current through parasitic capacitance, and the huge current change will generate pulse voltage through the action of stray inductance, thus forming strong electromagnetic interference. Common mode interference is the main part of conducted interference, and the interference signal is mainly a high-frequency signal above 1MHz.

[0003] In the related art, plug-in capacitors are usually selected as filter capacitors and connected to the connection end of the DC bus to reduce the common-mode interference signal in the circuit. However, in this case, there are many connecting wires between the filter capacitor and the interference source, the distance is far, and the stray inductance in the loop is large, which easily increases the loss of the power device. Utility Model Content

[0004] Embodiments of the present application provide a power module, an electronic device, a motor controller and a vehicle.

[0005] The power module provided in the embodiment of the present application includes a housing, a bridge power device and a filter capacitor. The bridge power device and the filter capacitor are encapsulated in the housing, the filter capacitor is connected to the bridge power device, and the filter capacitor can be used to reduce the high-frequency pulse signal generated during the opening or closing process of the bridge power device.

[0006] In this way, the electrical connection between the filter capacitor and the bridge power device can provide a shorter filtering path for the interference signal generated by the power device, reduce the stray inductance in the loop, and effectively reduce the switching loss of the power device.

[0007] In addition, both the filter capacitor and the bridge power device can be packaged inside the shell, so that the interference signal generated by the power device is limited inside the power module, thereby reducing the electromagnetic interference of the interference signal to the cables and circuit boards outside the power module, and effectively improving the electromagnetic compatibility performance of the electronic equipment.

[0008] In some embodiments, the power module includes a substrate, and the filter capacitor and the bridge power device are disposed on the substrate and connected through the substrate.

[0009] In this way, the substrate can support and protect the filter capacitor and the bridge power device while realizing the electrical connection between the filter capacitor and the bridge power device, thereby improving the utilization efficiency of the substrate.

[0010] In some embodiments, the filter capacitor includes a Y capacitor.

[0011] In this way, the Y capacitor can effectively suppress the common-mode interference signal generated by the bridge power device during the turn-on or turn-off process, thereby reducing the interference of the power module.

[0012] In some embodiments, the filter capacitor includes a chip capacitor.

[0013] In this way, the filter capacitor can adopt a chip capacitor, so that the resonant frequency is increased and the filter capacitor has a better filtering effect on the interference signal.

[0014] In some embodiments, the power module includes a positive DC connection terminal and a negative DC connection terminal, and the filter capacitor is connected between the positive DC connection terminal and the negative DC connection terminal.

[0015] In some embodiments, the power module includes a grounding electrode, the filter capacitor includes a first capacitor and a second capacitor, the first capacitor is connected between the positive electrode of the DC connection terminal and the grounding electrode, and the second capacitor is connected between the grounding electrode and the negative electrode of the DC connection terminal.

[0016] In some embodiments, the power module includes a positive DC connection terminal and a negative DC connection terminal, and the bridge power device is connected between the positive DC connection terminal and the negative DC connection terminal.

[0017] In this way, the filter capacitor can introduce the high-frequency pulse signal generated by the power module into the ground electrode, which can reduce the stray inductance of the filter circuit and reduce the loss of the power device.

[0018] In some embodiments, the power module includes an AC connection terminal connected to a midpoint of the bridge power device.

[0019] In some embodiments, the power module may further include a metal conductor layer and a connecting wire. The filter capacitor is electrically connected to the bridge power device through the connecting wire and the metal conductor layer.

[0020] In this way, the metal conductor layer and the connecting traces can realize the electrical connection between the filter capacitor and the bridge power device.

[0021] In certain embodiments, the power module substrate includes an insulating layer, the power module substrate includes the insulating layer and the plurality of metal conductor layers, and the insulating layer is configured to insulate and isolate the plurality of metal conductor layers.

[0022] In this way, the insulating layer can insulate and isolate multiple metal conductor layers to achieve electrical connection of electronic devices on the conductor layers.

[0023] The electronic device provided in the embodiment of the present application includes the power module of the above embodiment.

[0024] The motor controller provided in the embodiments of the present application includes the power module of the above embodiments.

[0025] The vehicle provided in the embodiments of the present application includes the power module, electronic device or motor controller of the above embodiments.

[0026] The embodiments of the present application provide a power module, an electronic device, a motor controller and a vehicle. The power module includes a housing, a bridge power device and a filter capacitor. The bridge power device and the filter capacitor are encapsulated in the housing, and the filter capacitor is connected to the bridge power device. The filter capacitor can be used to reduce the high-frequency pulse signal generated during the opening or closing of the bridge power device. The electrical connection between the filter capacitor and the bridge power device can provide a shorter filtering path for the interference signal generated by the power device, reduce the stray inductance in the loop, and effectively reduce the switching loss of the power device. In addition, the filter capacitor and the bridge power device can be encapsulated and arranged inside the housing, so that the interference signal generated by the power device is limited to the inside of the power module, thereby reducing the electromagnetic interference of the interference signal to the cables and circuit boards outside the power module, and effectively improving the electromagnetic compatibility performance of the electronic equipment.

[0027] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0029] Figure 1 is a circuit diagram of a power module according to an embodiment of the present application;

[0030] Figure 2 is a schematic diagram of an electronic device according to an embodiment of the present application;

[0031] Figure 3 It is a schematic diagram of the interference signal coupling path of the filter capacitor installation solution in the related art;

[0032] Figure 4 is a schematic diagram of an interference signal coupling path of a power module according to an embodiment of the present application;

[0033] Figure 5is a schematic diagram of the installation of a filter capacitor of a power module according to an embodiment of the present application;

[0034] Figure 6 is a schematic diagram of a motor controller and a vehicle according to an embodiment of the present application.

[0035] Description of the main component symbols: housing 10, bridge power device 20, filter capacitor 30, first capacitor 31, second capacitor 32, substrate 40, DC connection positive terminal 51, DC connection negative terminal 52, grounding terminal 53, AC connection terminal 54, metal conductor layer 61, connecting wiring 62, insulating layer 70, power module 100, electronic device 1000, motor controller 2000, vehicle 10000. DETAILED DESCRIPTION

[0036] The embodiments of the present application are described in detail below, and the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0037] Power module is a kind of electrical equipment with high reliability and high efficiency, which is widely used in many fields, including industrial control, power electronics, new energy, automotive electronics, etc. It has the advantages of fast response speed, high precision and long life. The switching action of power devices at work will generate large electromagnetic interference. The high-frequency pulse signal generated during high-speed opening and closing has a large current and voltage change rate. The huge voltage change will generate pulse current through parasitic capacitance, and the huge current change will generate pulse voltage through the action of stray inductance, thus forming strong electromagnetic interference. Common mode interference is the main part of conducted interference, and the interference signal is mainly a high-frequency signal above 1MHz.

[0038] In the related art, plug-in capacitors are usually selected as filter capacitors and connected to the connection end of the DC bus to reduce the common-mode interference signal in the circuit. However, in this case, there are many connecting wires between the filter capacitor and the interference source, the distance is far, and the stray inductance in the loop is large, which easily increases the loss of the power device.

[0039] Reference Figure 1 The embodiment of the present application provides a power module 100. The power module 100 includes a housing 10, a bridge power device 20 and a filter capacitor 30. The bridge power device 20 and the filter capacitor 30 are encapsulated in the housing 10, and the filter capacitor 30 is connected to the bridge power device 20. The filter capacitor 30 can be used to reduce the high-frequency pulse signal generated during the opening or closing process of the bridge power device 20.

[0040] Reference Figure 2 The embodiment of the present application also provides an electronic device 1000, which may include a power module 100 of the embodiment of the present application. The power module 100 may be used in technical fields such as industrial control, power electronics, new energy, and automotive electronics, and the electronic device 1000 may be an industrial control device, a power electronics device, a new energy device, a vehicle, and the like.

[0041] Specifically, the bridge power device 20 may include power devices. Power devices include semiconductor devices such as diodes, MOSFETs, IGBTs, and SICs. Power devices may be used to adjust current and voltage and control power conversion in the electronic device 1000.

[0042] A pulse signal is an electrical signal that appears in the form of a pulse and can be generated instantaneously by a sudden high voltage or high current. When a power device is turned on or off, the current or voltage on the power device connection line may change suddenly, generating a high-frequency pulse signal of more than 1MHz. High-frequency pulse signals can be used as interference signals. High-frequency pulse signals have a large current and voltage change rate. The huge voltage change will generate a pulse current through parasitic capacitance, while the huge current change will generate a pulse voltage through the action of stray inductance, thereby forming a strong electromagnetic interference.

[0043] The filter capacitor 30 can form a corresponding filter circuit for filtering high-frequency pulse signals in the circuit. By properly configuring the capacitance value of the filter capacitor 30, the frequencies of different signals can be filtered.

[0044] The connecting wires, electronic device leads, and electronic device bodies in the circuit all have stray inductance. The longer the connection path in the circuit, the more electronic devices it passes through, the greater the inductance value of the stray inductance in the circuit, and the greater the loss of the power device.

[0045] In the related art, the interference signal coupling path of the filter capacitor 30 installation solution can be referred to Figure 3 The filter capacitor 30 is arranged on the DC side outside the power module 100. The power module 100 can be connected to an AC load through the AC side, the parasitic capacitance between the AC load and the common ground can be set to Ca1, the parasitic capacitance between the housing 10 and the common ground can be set to Ca2, and the parasitic capacitance between the DC side and the common ground can be set to Ca3. The stray inductance on the AC side can be set to inductance L2, and the stray inductance on the DC side can be set to inductance L3.

[0046] Taking the power device Q2 as an example, the path of the common-mode interference signal is shown by the arrow in the figure, which can be set as line Ib1 and line Ib3. Among them, line Ib1 includes stray inductance L2, parasitic capacitance Ca1, Ca3 and stray inductance L3, and line Ib3 includes stray inductance L1, parasitic capacitance Ca2, Ca3 and stray inductance L3. The interference signal at the midpoint of the bridge arm can reach the capacitor Cy2 through the stray inductance L2, parasitic capacitance Ca1, common ground, parasitic capacitance Ca3 and stray inductance L3, and can also reach the capacitor Cy2 through the stray inductance L1, parasitic capacitance Ca2, common ground, parasitic capacitance Ca3 and stray inductance L3.

[0047] The interference generated by the power device Q2 needs to pass through multiple parasitic capacitors to be grounded via the filter capacitor element Cy2, and the inductance value of the stray inductance in the filter path is relatively large.

[0048] In the power module 100 of the embodiment of the present application, no additional electronic devices are required between the bridge power device 20 and the filter capacitor 30, and the inductance value of the stray inductance in the filter path is small, which effectively reduces the switching loss of the bridge power device 20 and thereby reduces the loss of the power module 100.

[0049] by Figure 4 For example, the bridge power device 20 may include a power device Q2, the filter capacitor 30 may include a capacitor element Cy2, the first electrode of the power device Q2 may be connected to the first end of the capacitor element Cy2, and the stray inductance of the power device Q2 may be set to the inductance L1.

[0050] Taking the power device Q2 as an example, the common-mode interference signal path is shown by the arrow in the figure, and can be set to line Ia1. Line Ia1 includes stray inductance L1, and other electronic devices may not pass through between the power device Q2 and the capacitor element Cy2, so that the filtering path of the interference signal generated by the power device Q2 is shorter, and the inductance value of the stray inductance in the filtering path is smaller, which effectively reduces the switching loss of the power device Q2, thereby reducing the loss of the power module 100.

[0051] In this way, the electrical connection between the filter capacitor 30 and the bridge power device 20 can provide a shorter filtering path for the interference signal generated by the power device, reduce the stray inductance in the loop, and effectively reduce the switching loss of the power device.

[0052] In addition, the filter capacitor 30 and the bridge power device 20 can be packaged and arranged inside the shell 10, so that the interference signal generated by the power device is limited to the inside of the power module 100, thereby reducing the electromagnetic interference of the interference signal to the cables and circuit boards outside the power module 100, and effectively improving the electromagnetic compatibility performance of the electronic device 1000.

[0053] In some embodiments, the power module 100 includes a substrate 40 , and the filter capacitor 30 and the bridge power device 20 are disposed on the substrate 40 and connected through the substrate 40 .

[0054] Specifically, the substrate 40 can be set as a ceramic substrate 40, and welding points corresponding to the electronic components can be set on the ceramic substrate 40. The substrate 40 can connect the welding points of each electronic component to each other according to a certain layout. When the electronic components are welded to the corresponding welding points, the electronic components of the power module 100 can be electrically connected according to a certain layout.

[0055] In this way, the substrate 40 can support and protect the filter capacitor 30 and the bridge power device 20 while achieving electrical connection between the filter capacitor 30 and the bridge power device 20 .

[0056] In some embodiments, the filter capacitor 30 includes a Y capacitor.

[0057] Specifically, a Y capacitor is a safety capacitor with specific safety standards. Y capacitors can be used in situations where there is no risk of electric shock after the capacitor fails.

[0058] The Y capacitor has a good effect on suppressing the common-mode interference signal of the power module 100. The common-mode interference signal of the power module 100 may come from the high-speed switching action of the power device. The common-mode interference signal is the main part of the conducted interference inside the power module and the electronic device. The Y capacitor can provide a low-impedance path so that the common-mode current can flow into the ground, thereby reducing the impact of the common-mode interference on the circuit.

[0059] In this way, the Y capacitor can effectively suppress the interference signal generated during the switching on or off of the bridge power device 20 , thereby reducing the interference of the power module 100 .

[0060] In some embodiments, the filter capacitor 30 includes a chip capacitor.

[0061] Specifically, the Y capacitor of the above embodiment can be a chip capacitor. The chip capacitor can include a ceramic chip capacitor, an organic chip capacitor, an aluminum electrolytic chip capacitor, a tantalum chip capacitor and a super capacitor. The size of the chip capacitor is usually small and the pins are short, which makes the chip capacitor installation occupy a small space and easy to integrate into the power module, so the filter path connected to the chip capacitor is short.

[0062] The parasitic inductance of the filter capacitor 30 and the pin can be set to ESL, and the capacitance value of the filter capacitor 30 can be set to C. According to the resonant frequency formula It can be seen that, under the condition of the same capacitance value, the smaller the parasitic inductance of the filter capacitor 30 is, the higher the resonant frequency of the filter capacitor 30 will be, the lower the impedance will be, the wider the filtering frequency band will be, and the better the filtering effect on the interference signal will be.

[0063] The filter capacitor 30 can be a chip capacitor. Compared with the plug-in capacitor, the pin length of the chip capacitor is very small, so the parasitic inductance between the chip capacitor and the pin is also very small. Since the pin of the chip capacitor is short, the parasitic inductance between the filter capacitor 30 and the pin is smaller, so that the filter capacitor 30 has a better filtering effect on the interference signal.

[0064] In this way, the filter capacitor 30 can be a chip capacitor, so that the resonant frequency is increased and the filter capacitor 30 has a better filtering effect on the interference signal.

[0065] Reference Figure 1 In some embodiments, the power module 100 includes a DC connection terminal positive electrode 51 and a DC connection terminal negative electrode 52 , and the filter capacitor 30 is connected between the DC connection terminal positive electrode 51 and the DC connection terminal negative electrode 52 .

[0066] Specifically, the DC connection terminal positive electrode 51 and the DC connection terminal negative electrode 52 can be used to access the DC voltage. For example, the DC connection terminal positive electrode 51 can be connected to the positive electrode of the DC bus capacitor, and the DC connection terminal negative electrode 52 can be connected to the negative electrode of the DC bus capacitor.

[0067] The filter capacitor 30 may be connected between the DC connection terminal positive electrode 51 and the DC connection terminal negative electrode 52 .

[0068] Reference Figure 1 In some embodiments, the power module 100 includes a grounding electrode 53, and the filter capacitor 30 includes a first capacitor 31 and a second capacitor 32, the first capacitor 31 is connected between the positive electrode 51 of the DC connection terminal and the grounding electrode 53, and the second capacitor 32 is connected between the grounding electrode and the negative electrode 52 of the DC connection terminal.

[0069] Specifically, the grounding electrode 53 can introduce the interference signal of the power module 100 into the ground electrode to reduce the interference signal of the power module 100. The first capacitor 31 can be set as the capacitor element Cy1, and the second capacitor 32 can be set as the capacitor element Cy2. It should be noted that the grounding electrode 53 can be a separate ground.

[0070] Reference Figure 1 In some embodiments, the power module 100 includes a DC connection terminal positive electrode 51 and a DC connection terminal negative electrode 52 , and the bridge power device 20 is connected between the DC connection terminal positive electrode 51 and the DC connection terminal negative electrode 52 .

[0071] Specifically, the bridge power device 20 may include a bridge arm circuit formed by a plurality of power devices. The bridge power device 20 may realize the conversion and control of electric energy. For example, the bridge power device 20 may realize rectification, buck-boost and inversion.

[0072] For example, the bridge power device 20 may include a switch tube Q1, a switch tube Q2, a diode D1 and a diode D2. The diode D1 is reversely connected to the switch tube Q1, and the diode D2 is reversely connected to the switch tube Q2. During the fast switching process of the power device, the common-mode interference signal generated by the continuous change of the potential at the point U can be introduced into the ground through the capacitor elements Cy1 and Cy2.

[0073] In this way, the filter capacitor 30 can introduce the high-frequency pulse signal generated by the power module 100 into the ground, thereby protecting the power module 100 .

[0074] In some embodiments, the power module 100 includes an AC connection terminal 54 , and the AC connection terminal 54 is connected to a midpoint of the bridge power device 20 .

[0075] Specifically, the AC connection terminal 54 may include a U-phase connection terminal, a Y-phase connection terminal and a W-phase connection terminal. The bridge power device 20 may include switch tubes Q1, Q2, Q3, Q4, Q5 and Q6 and their corresponding freewheeling diodes.

[0076] The U-phase connection end can be connected between the switch tube Q1 and the switch tube Q2. By controlling the switch tube Q1 and the switch tube Q2 and their freewheeling diodes, the bridge power device 20 can convert the DC voltage connected to the DC connection positive terminal 51 and the DC connection negative terminal 52 into an AC voltage for the U-phase connection end.

[0077] The V-phase connection end can be connected between the switch tube Q3 and the switch tube Q4. By controlling the switch tube Q3 and the switch tube Q4 and their freewheeling diodes, the bridge power device 20 can convert the DC voltage connected to the DC connection end positive electrode 51 and the DC connection end negative electrode 52 into an AC voltage for the V-phase connection end.

[0078] The W-phase connection end can be connected between the switch tube Q5 and the switch tube Q6. By controlling the switch tube Q5 and the switch tube Q6 and their freewheeling diodes, the bridge power device 20 can convert the DC voltage connected to the DC connection end positive electrode 51 and the DC connection end negative electrode 52 into an AC voltage for the W-phase connection end.

[0079] Reference Figure 5 In some embodiments, the power module 100 may further include a metal conductor layer 61 and a connection wire 62. The filter capacitor 30 is electrically connected to the bridge power device 20 through the connection wire 62 and the metal conductor layer 61.

[0080] The substrate 40 may be provided with welding points corresponding to the electronic components, and the metal layer and the connecting traces 62 may connect the welding points of the electronic components to each other according to a certain layout. When the electronic components are welded to the corresponding welding points, the electronic components of the power module 100 may be electrically connected according to a certain layout.

[0081] For example, a welding point of the capacitor element Cy2 may be provided on the substrate 40, and the metal conductor layer 61 may include a copper cladding provided on the substrate 40. One end of the welding point of the capacitor element Cy2 may be electrically connected to the power device Q2 through the connection trace 62 and the copper cladding.

[0082] In some embodiments, the power module 100 includes an insulating layer 70 and a plurality of metal conductor layers 61 , and the insulating layer 70 is configured to insulate and isolate the plurality of metal conductor layers 61 .

[0083] Specifically, an insulating layer 70 may be provided on the substrate 40 , and the insulating layer 70 may divide the substrate 40 into a plurality of sections. The metal conductor layer 61 of each section is insulated and isolated, and the electronic components arranged on each insulated and isolated metal conductor layer 61 may be electrically connected via connecting traces 62 .

[0084] by Figure 5 For example, the insulating layer 70 can divide the substrate 40 into 9 metal conductor layer 61 intervals. Among them, the first interval can be provided with a switch tube Q2, a diode D2 and a capacitor element Cy2. The second interval can be provided with a switch tube Q1 and a diode D1. The third interval can be provided with a switch tube Q4, a diode D4 and a capacitor element Cy4. The fourth interval can be provided with a switch tube Q3 and a diode D3. The fifth interval can be provided with a switch tube Q6, a diode D6 and a capacitor element Cy6. The sixth interval can be provided with a switch tube Q5 and a diode D5. The seventh interval can be provided with a capacitor element Cy1, the eighth interval can be provided with a capacitor element Cy3, and the ninth interval can be provided with a capacitor element Cy5.

[0085] In this way, the insulating layer 70 can insulate and isolate multiple power device regions to ensure the normal operation of the circuit.

[0086] Reference Figure 6 The present application also provides a motor controller and a vehicle 10000. The motor controller 2000 may include the power module 100 of the above embodiment. The vehicle 10000 may include the power module 100, the electronic device 1000 or the motor controller 2000 of the above embodiment.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0088] In addition, the term "connection" should be understood in a broad sense, for example, it can include fixed connection, detachable connection, or integral connection; it can include direct connection, indirect connection through an intermediate medium, and internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0089] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0090] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0091] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A power module, characterized in that: The power module comprises: case; A bridge power device and a filter capacitor are encapsulated in the housing, wherein the filter capacitor is connected to the bridge power device and is used to reduce interference signals generated during the opening or closing process of the bridge power device.

2. The power module according to claim 1, characterized in that: The power module includes a substrate, and the filter capacitor and the bridge power device are arranged on the substrate and connected through the substrate.

3. The power module according to claim 1, characterized in that: The filter capacitor includes a Y capacitor.

4. The power module according to claim 1, characterized in that: The filter capacitor includes a chip capacitor.

5. The power module according to claim 1, characterized in that: The power module comprises a positive DC connection terminal and a negative DC connection terminal, and the filter capacitor is connected between the positive DC connection terminal and the negative DC connection terminal.

6. The power module according to claim 5, characterized in that: The power module includes a grounding electrode, and the filter capacitor includes a first capacitor and a second capacitor. The first capacitor is connected between the positive electrode of the DC connection terminal and the grounding electrode, and the second capacitor is connected between the grounding electrode and the negative electrode of the DC connection terminal.

7. The power module according to claim 1, characterized in that: The power module comprises a positive DC connection terminal and a negative DC connection terminal, and the bridge power device is connected between the positive DC connection terminal and the negative DC connection terminal.

8. The power module according to claim 7, characterized in that: The power module includes an AC connection terminal connected to a midpoint of the bridge power device.

9. The power module according to claim 1, characterized in that: The power module includes a connecting wire and a metal conductor layer, and the filter capacitor is electrically connected to the bridge power device through the connecting wire and the metal conductor layer.

10. The power module according to claim 9, characterized in that: The power module includes an insulating layer and a plurality of metal conductor layers, wherein the insulating layer is configured to insulate and isolate the plurality of metal conductor layers.

11. An electronic device, characterized in that: The electronic device comprises the power module according to any one of claims 1 to 10.

12. A motor controller, characterized in that: The motor controller comprises the power module according to any one of claims 1-10.

13. A vehicle, characterized in that: The vehicle comprises the power module according to any one of claims 1 to 10, the electronic device according to claim 11, or the motor controller according to claim 12.

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