Power module, electric control inverter and vehicle

Abstract

The utility model relates to a power module, an electric control inverter and a vehicle. The power module comprises a power module body, a magnetic core and a current sensor. The power module body comprises a base, a power unit located on the base and a plurality of phase terminals which extend outwards from the power unit and are used for transmitting phase current; the magnetic cores and the phase terminals are arranged in a one-to-one correspondence mode, in a plane perpendicular to the extending direction of the phase terminals, the magnetic cores are arranged around the phase terminals and provided with openings, the current sensors and the magnetic cores are arranged in a one-to-one correspondence mode, and the current sensors are arranged in the openings. According to the current sensor, the magnetic cores are integrated in the power module, and the magnetic cores are arranged around the corresponding phase terminals, so that magnetic core barriers capable of playing a magnetic field shielding role exist between the phase terminals of the power module, the anti-crosstalk capability between the phase terminals is improved, and the sampling precision of the current sensor is further improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of power semiconductor devices, and in particular to a power module, an electric-controlled inverter and a vehicle. Background Art

[0002] With the continuous development of social economy, cars have become an indispensable part of people's lives. At present, with the rapid development of the new energy vehicle market, industry competition has become increasingly fierce. Reducing the size of the electric control inverter and increasing the power density of the electric control inverter has become a major trend.

[0003] In the prior art, in order to reduce the volume of the electronically controlled inverter, the current sensor is usually installed in the plastic sealing opening of the phase terminal (e.g., phase copper busbar) of the power module by crimping. The current sensor is integrated into the power module. Although this reduces the volume of the electronically controlled inverter and improves the power density of the electronically controlled inverter, there is magnetic field crosstalk between the phase terminals, resulting in a decrease in the sampling accuracy of the current sensor. Utility Model Content

[0004] In order to solve the above technical problems, the present disclosure provides a power module, an electric-controlled inverter and a vehicle to shield the magnetic field crosstalk between phase terminals and improve the sampling accuracy of the current sensor.

[0005] The embodiment of the present disclosure provides a power module, including: a power module body, a magnetic core and a current sensor;

[0006] The power module body includes a base, a power unit located on the base, and a plurality of phase terminals extending outward from the power unit for transmitting phase current;

[0007] The magnetic core is arranged in one-to-one correspondence with the phase terminal. In a plane perpendicular to the extension direction of the phase terminal, the magnetic core portion is arranged around the phase terminal and has an opening. The current sensor is arranged in one-to-one correspondence with the magnetic core, and the current sensor is placed in the opening.

[0008] Optionally, a length of the magnetic core in an extension direction of the phase terminal is greater than a length of the current sensor in the extension direction of the phase terminal.

[0009] Optionally, the opening is arranged on a side of the magnetic core facing away from the base.

[0010] Optionally, the power module further includes a circuit board, wherein the circuit board is fixed on the base, and the current sensor is mounted on a surface of the circuit board facing the base.

[0011] Optionally, the circuit board seals the opening.

[0012] Optionally, two ends of the magnetic core located at the opening pass through the circuit board.

[0013] Optionally, the power module body further includes a plastic-encapsulated shell, wherein the plastic-encapsulated shell covers the magnetic core; and / or the plastic-encapsulated shell covers a portion of the phase terminal corresponding to a position of the magnetic core.

[0014] Optionally, the power module further includes a direct copper clad ceramic substrate, the base is a heat sink, the direct copper clad ceramic substrate is located on a surface of the base facing the power unit, and the phase terminal is in contact with the direct copper clad ceramic substrate.

[0015] The embodiments of the present disclosure also provide an electronically controlled inverter, comprising any power module as described above.

[0016] The disclosed embodiment also provides a vehicle, comprising the electronically controlled inverter as described above.

[0017] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0018] In the solution provided by the embodiment of the present disclosure, the magnetic core is integrated into the power module, and the magnetic core surrounds the phase terminal and is arranged one-to-one with the phase terminal, so that an electromagnetic barrier that can play a magnetic field shielding role exists between each phase terminal in the power module, thereby shielding the magnetic field crosstalk between the phase terminals. The current sensor is placed in the power module through the opening of the magnetic core, and the magnetic field shielding role played by the magnetic core is used to prevent the current sensor from being disturbed by the magnetic field generated by the surrounding phase terminals when collecting the magnetic field generated by the corresponding phase terminal, thereby improving the sampling accuracy of the current sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 A schematic diagram of a power module structure provided in an embodiment of the present disclosure;

[0022] Figure 2 A schematic diagram of the size relationship between a magnetic core and a current sensor provided in an embodiment of the present disclosure;

[0023] Figure 3An exploded diagram of a power module provided in an embodiment of the present disclosure;

[0024] Figure 4 A cross-sectional view of a power module provided in an embodiment of the present disclosure;

[0025] Figure 5 A schematic diagram of the positional relationship between a magnetic core and a circuit board provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0028] The electronically controlled inverter (i.e., motor controlled inverter) is the energy conversion component of electric vehicles. Its core is to realize the inverter function from DC to AC. The power module is an indispensable part of the electronically controlled inverter, which is used for switch control to realize energy conversion. At the same time, the motor controller samples the phase current output by the power module, and then controls the switching moment of the full bridge of the power module through the space vector pulse modulation algorithm, thereby realizing closed-loop control of the phase current, and finally realizing the control of the motor torque and speed. Therefore, the sampling of phase current in the electronically controlled inverter is particularly important for realizing high-performance control of the motor.

[0029] In the prior art, in order to reduce the volume of the electronically controlled inverter, the current sensor is usually installed in the plastic sealing opening of the phase terminal (e.g., phase copper busbar) of the power module by crimping. The current sensor is integrated into the power module. Although this reduces the volume of the electronically controlled inverter and improves the power density of the electronically controlled inverter, there is magnetic field crosstalk between the phase terminals, resulting in a decrease in the sampling accuracy of the current sensor.

[0030] In order to solve the above-mentioned problems, the embodiments of the present disclosure provide a power module, an electric controlled inverter and a vehicle. By integrating a magnetic core in the power module and arranging the magnetic core around the corresponding phase terminals, a magnetic core barrier that can shield the magnetic field exists between the phase terminals of the power module, thereby improving the anti-crosstalk capability between the phase terminals and further improving the sampling accuracy of the current sensor.

[0031] In the following, in conjunction with the accompanying drawings, a power module, an electric-controlled inverter and a vehicle provided in an embodiment of the present disclosure are exemplarily described.

[0032] Figure 1 A schematic diagram of a power module structure provided in an embodiment of the present disclosure is shown in FIG. Figure 1 As shown, the power module includes: a power module body, a magnetic core 200 and a current sensor 300;

[0033] The power module body includes a base 110 , a power unit 120 located on the base 110 , and a plurality of phase terminals 130 extending outward from the power unit 120 for transmitting phase currents.

[0034] The magnetic core 200 is arranged one-to-one with the phase terminal 130. In a plane perpendicular to the extension direction of the phase terminal 130, the magnetic core 200 is partially arranged around the phase terminal 130 and has an opening. The current sensor 300 is arranged one-to-one with the magnetic core 200 and is placed in the opening.

[0035] Exemplarily, the magnetic core 200 surrounds the phase terminal 130 and is provided with an opening in a plane perpendicular to the extension direction of the phase terminal 130 , and the current sensor 300 can be placed in the magnetic core through the opening provided in the magnetic core 200 .

[0036] It should be noted that the opening direction of the magnetic core 200 can be any direction that is convenient for placing the current sensor 300 in the opening, and is not specifically limited here.

[0037] Exemplarily, multiple phase terminals 130 are arranged along the circumference of the power module body. When the power module is working, the phase current is transmitted through the phase terminal 130. When the phase current flows through the phase terminal 130, the phase terminal 130 generates a magnetic field that diverges outward, and the current sensor 300 outputs a voltage by collecting the magnetic field of the corresponding phase terminal 130. However, since multiple phase terminals 130 are provided on the power module, and interference will occur between the magnetic fields diverged by the phase terminals 130, the current sensor 300 will collect the magnetic field after being interfered by the surrounding magnetic field, thereby affecting the sampling accuracy of the current sensor 300. The magnetic core 200 can be set in the gap between the original phase terminal 130 and the base 110 in the power module, without adjusting the electrical layout in the power module. The power density of the module is obtained by calculating the ratio of the output power of the module to the overall volume of the module. When the performance of the power module itself remains unchanged, the volume increment of the power module is small, thereby ensuring that the power density of the power module itself will not decrease. Since the current sensor with integrated magnetic core has a large volume, which will lead to a decrease in the power density of the power module installed with the current sensor, the present invention integrates a magnetic core on the power module, so that the power module does not need to use a current sensor with integrated magnetic core, but only needs to use a smaller current sensor without magnetic core, thereby ensuring that the volume of the power module will not be too large due to the excessive volume of the current sensor, thereby ensuring that the power density of the power module itself will not be reduced.

[0038] The magnetic core 200 is arranged in one-to-one correspondence with the phase terminal 130, and the magnetic core 200 is arranged around the phase terminal 130, so that each phase terminal 130 has a magnetic core barrier that plays a role in magnetic field shielding. At this time, the magnetic core 200 will only have leakage magnetic field in the opening direction and in the extension direction of the phase terminal 130, and the magnetic field in directions other than the above two directions will be limited in the magnetic core 200, so as to avoid the magnetic field diverged by the magnetic field leaked from the adjacent phase terminal 130 in directions other than the above two directions, thereby improving the anti-crosstalk capability between each phase terminal 130. Since the anti-crosstalk capability between each phase terminal 130 is enhanced, it can be avoided that the magnetic field diverged by the phase terminal 130 is cross-talked by the magnetic field diverged by the adjacent phase terminal 130, thereby preventing the magnetic field intensity collected by the current sensor 300 corresponding to the phase terminal 130 from increasing, thereby preventing the voltage output by the current sensor 300 from increasing due to the increase in the collected magnetic field intensity, thereby improving the sampling accuracy of the current sensor. Furthermore, the magnetic field emitted by the phase terminal 130 can be gathered by the magnetic core 200 without being disturbed by other magnetic fields, so that the current sensor 300 arranged at the opening of the phase terminal 130 can collect a magnetic field with less interference and greater intensity, thereby improving the sampling accuracy of the current sensor.

[0039] It should be noted that Figure 1 Three phase terminals 130 and corresponding magnetic cores 200 and current sensors 300 are exemplarily drawn, and the shape of the magnetic core 200 and the positional relationship with the phase terminals 130 and the current sensor 300 are exemplarily drawn, which are not specifically limited here.

[0040] In some embodiments, Figure 2 A schematic diagram of the relationship between the dimensions of a magnetic core and a current sensor provided in an embodiment of the present disclosure is shown in FIG. Figure 2 As shown, the length of the magnetic core 200 in the extension direction X of the phase terminal 130 is greater than the length of the current sensor 300 in the extension direction X of the phase terminal 130 .

[0041] Exemplarily, the length of the magnetic core 200 in the extension direction X of the phase terminal 130 is greater than the length of the current sensor 300 in the extension direction X of the phase terminal 130. As a result, the current sensor 300 can be completely wrapped in the magnetic core 200 to achieve spatial shielding of the magnetic field, while avoiding the collection of magnetic fields leaked from the phase terminals 130 other than the corresponding phase terminals 130 due to the length of the current sensor 300 in the extension direction X exceeding the length of the magnetic core 200 in the extension direction X. The present disclosure enables the current sensor 300 to be completely wrapped in the magnetic core 200 through the above-mentioned setting to ensure that the current sensor 300 will not collect the magnetic field diverged by the adjacent phase terminal 130. And because the magnetic core 200 can also have a gathering effect on the magnetic field diverged by the phase terminal 130, the current sensor 300 completely wrapped in the magnetic core 200 can collect a magnetic field with less interference and greater intensity, thereby further improving the sampling accuracy of the current sensor.

[0042] In some embodiments, see Figure 1 The opening is arranged on a side of the magnetic core 200 away from the base 110 .

[0043] For example, since the phase terminals 130 are arranged one by one around the power unit 120 in the horizontal direction, the crosstalk between the phase terminals 130 in the horizontal direction is relatively serious. Based on this, the present disclosure arranges the opening of the magnetic core 200 on the side of the magnetic core 200 away from the base 110, that is, the opening of the magnetic core 200 is vertically upward, thereby shielding the magnetic field emitted by the phase terminals 130 in the horizontal direction, and further improving the anti-crosstalk capability between the phase terminals 130.

[0044] In some embodiments, Figure 3 An exploded diagram of a power module provided in an embodiment of the present disclosure, Figure 4 A cross-sectional view of a power module provided in an embodiment of the present disclosure, such as Figure 3 and Figure 4 As shown, the power module further includes a circuit board 400 , which is fixed on the base 110 , and the current sensor 300 is mounted on a surface of the circuit board 400 facing the base 110 .

[0045] Specifically, the circuit board 400 includes a fixing through hole 401, and the base 110 includes a fixing female seat 111, and the fixing through hole 401 and the fixing female seat 111 are arranged one by one. First, the fixing through hole 401 is aligned with the fixing female seat 111, and after alignment, the circuit board 400 can be fixed on the base 110 by installing screws, thereby fixing the relative position of the circuit board 400 and the base 110. The power unit is arranged on the base 110 and the phase terminal 130 is extended outward from the power unit. Therefore, since the relative position of the circuit board 400 and the base 110 is fixed, and the relative position of the power unit and the base 110 is also fixed, the positional relationship between the phase terminal 130 and the circuit board 300 is also fixed. In addition, since the magnetic core 200 is arranged around the phase terminal 130, and the current sensor 300 is arranged at the opening position of the magnetic core 200, the position of the magnetic core 200 relative to the circuit board 400 can be determined, and then the relative position of the current sensor 300 and the circuit board 400 can be determined. Based on the relative position relationship between the current sensor 300 and the circuit board 400, the current sensor 300 can be mounted on the circuit board 400. Since the current sensor 300 needs to be arranged in the opening of the magnetic core 200, and the magnetic core 200 is arranged on the side of the circuit board 400 facing the base 110, the current sensor 300 needs to be mounted on the surface of the circuit board 400 facing the base 110. The present disclosure mounts the current sensor 300 on the circuit board 300, and fixes the relative positions of the components in the power module, so that the vibration displacement of the current sensor 300 relative to the magnetic core 200 or the phase terminal 130 when the power module vibrates is reduced, or even does not exist, so that the position of the current sensor 300 can always stay at the position with the maximum magnetic field, further improving the sampling accuracy of the current sensor.

[0046] In some embodiments, a circuit board seals the opening.

[0047] Specifically, when the circuit board is fixed to the base, the circuit board will seal the opening of the magnetic core accordingly, and at the same time, the current sensor arranged on the surface of the circuit board facing the base is sealed in the magnetic core. An electromagnetic shielding layer is also arranged on the circuit board, which is equivalent to arranging the current sensor and the phase terminal in a four-end closed magnetic field shielding barrier, thereby shielding the magnetic field that diverges outward in various directions perpendicular to the extension direction of the phase terminal, preventing the phase terminal from leaking the magnetic field outward from the opening direction of the magnetic core, and at the same time, shielding the magnetic field diverged by the adjacent phase terminals in various directions perpendicular to the extension direction of the phase terminal, thereby improving the anti-crosstalk capability between the phase terminals. In addition, the four-end closed magnetic field shielding barrier composed of the magnetic core and the circuit board can also gather the magnetic field emitted by the phase terminal, so that the current sensor can collect a magnetic field with less interference and greater intensity, thereby improving the sampling accuracy of the current sensor.

[0048] In some embodiments, Figure 5 A schematic diagram of the positional relationship between a magnetic core and a circuit board provided in an embodiment of the present disclosure is shown in FIG. Figure 5 As shown, two ends of the magnetic core 200 located at the opening pass through the circuit board 400 .

[0049] Exemplarily, the two ends of the magnetic core 200 at the opening pass through the circuit board 400 and extend beyond the circuit board 400, so that the magnetic core 200 and the circuit board 400 can form a complete magnetic field shielding area. At this time, the phase terminal 130 only has a magnetic field in the direction extending toward the phase terminal, further improving the anti-crosstalk capability between adjacent phase terminals 130. It can also avoid that the gap between the magnetic core 200 and the circuit board 400 is left because the two ends of the magnetic core 200 do not pass through the circuit board 400, thereby causing the phase terminal to leak magnetic flux, which affects the sampling accuracy of the current sensor. At the same time, the height of the magnetic core 200 is not higher than the height of the original signal terminal in the power module, so that the setting of the magnetic core 200 will not increase the height of the power module, thereby avoiding the setting of the magnetic core 200 to increase the volume of the power module.

[0050] It should be noted that the two ends of the magnetic core 200 at the opening can be flush with the circuit board 400 after passing through the circuit board 400, or other lengths of the two ends that can enable the magnetic core 200 and the circuit board 400 to form a closed magnetic field shielding area, which is not specifically limited here.

[0051] In some embodiments, see Figure 4 The power module body further includes a plastic package shell 140 , and the plastic package shell 140 covers the magnetic core 200 ; and / or the plastic package shell 140 covers a portion of the phase terminal 130 corresponding to the position of the magnetic core 200 .

[0052] Exemplarily, the overlapping portion of the phase terminal 130 and the magnetic core 200 in the vertical direction is the portion corresponding to the position of the phase terminal 130 and the magnetic core 200, and the plastic package shell 140 can wrap the portion of the phase terminal 130 corresponding to the position of the magnetic core 200. The plastic package shell 140 can completely wrap the magnetic core 200 and fix it to the base 110 of the power module body through the plastic package shell 140, or the plastic package shell 140 only wraps the corresponding portion of the magnetic core 200 and the position of the phase terminal 130 and fixes it to the base 110 of the power module body, thereby realizing the integration of the magnetic core 200 in the power module. And the phase terminal 130 can be passed through the plastic package shell 140, at which time the plastic package shell 140 can insulate and separate the magnetic core 200 from the phase terminal 130, thereby avoiding a short circuit between the magnetic core 200 and the phase terminal 130, thereby causing the magnetic field emitted by the phase terminal 130 to be abnormal, so that the current sensor 300 collects wrong magnetic field data, thereby avoiding the reduction of the sampling accuracy of the current sensor 300. At the same time, since the magnetic core 200 and the phase terminal 130 can be fixed by the plastic package shell 140, the relative position between the magnetic core 200 and the phase terminal 130 is also fixed, thereby fixing the relative position of the current sensor 300 to the magnetic core 200 and the phase terminal 130. As a result, the vibration displacement of the current sensor 300 relative to the magnetic core 200 or the phase terminal 130 is reduced when the power module vibrates, or even there is no vibration displacement, so that the position of the current sensor 300 can always stay at the position with the largest magnetic field, further improving the sampling accuracy of the current sensor 300.

[0053] In some embodiments, the power module further includes a direct copper clad ceramic substrate, the base is a heat sink, the direct copper clad ceramic substrate is located on a surface of the base facing the power unit, and the phase terminal is in contact with the direct copper clad ceramic substrate.

[0054] Specifically, a plurality of IGBT chips and a diode chip are arranged in the power unit, and the plurality of IGBT chips and the diode chip form an upper bridge arm and a lower bridge arm, and the direct copper-clad ceramic substrate is electrically connected to the midpoint of the bridge arm between the upper bridge arm and the lower bridge arm. The direct copper-clad ceramic substrate can collect the phase currents in the IGBT chips and the diode chips in the upper and lower bridge arms at the midpoint of the bridge arm, and output the collected phase currents through the phase terminal in contact with the direct copper-clad ceramic substrate, thereby further improving the current output capacity of the phase terminal. The direct copper-clad ceramic substrate is arranged between the power unit and the heat sink, and the direct copper-clad ceramic substrate is in contact with the heat sink, thereby achieving indirect contact between the phase terminal and the heat sink. Since the current output capacity of the phase terminal is further enhanced, the current output by the phase terminal is larger when the power module is working, and the phase terminal itself has a certain resistance value, so the heat generated by the phase terminal when the current flows through the phase terminal is greater. At this time, the heat generated by the phase terminal can be transferred to the heat sink through the direct copper-clad ceramic substrate, thereby achieving heat dissipation of the phase terminal and avoiding the problem of damage to the power module due to excessive heat generated by the phase terminal due to the power module working for too long. The direct copper-clad ceramic substrate can also insulate the power unit from the heat sink to prevent a short circuit between the power unit and the heat sink, which would cause the power unit to be abnormally grounded and thus malfunction.

[0055] In some embodiments, the magnetic core is U-shaped.

[0056] For example, the vertical core parts at both ends of the U-shaped core will become the N pole and the S pole respectively during the operation of the power module. Since the vertical core parts at both ends of the U-shaped core are parallel to each other, the magnetic field emitted by the phase terminal can be changed from an arc to a horizontal line, thereby ensuring a more uniform distribution of the magnetic field, so that the current sensor can collect a uniform magnetic field, further ensuring the sampling accuracy of the current sensor.

[0057] It should be noted that the shape of the magnetic core may also be other shapes with openings other than the U-shape, such as a C-shape. The shape of the magnetic core may be set according to actual conditions and is not specifically limited here.

[0058] It should be noted that the magnetic core can be fixed by, for example, a plastic package shell and a base, or by other methods, which are not specifically limited here.

[0059] The embodiments of the present disclosure also provide an electronically controlled inverter, comprising any power module as described above.

[0060] The electric controlled inverter also includes a regulating module and a control module, and the current sensor in the power module is electrically connected to the control module through the regulating module. Since the control module has different requirements for the voltage signal output by the current sensor, it is necessary to use the regulating module to regulate the voltage signal collected by the current sensor.

[0061] Exemplarily, the regulating module includes a voltage divider circuit. For example, when the voltage signal collected and output by the current sensor is 5V, and the voltage signal required by the control module is 2.5V, the voltage signal collected and output by the current sensor can be divided by the voltage divider circuit in the regulating module to divide the 5V voltage signal, and output a 2.5V voltage signal to the control module to meet the needs of the control module.

[0062] Exemplarily, the regulating module includes a boost circuit. For example, when the voltage signal collected and output by the current sensor is 2.5V, and the voltage signal required by the control module is 5V, the voltage signal collected and output by the current sensor can be boosted by the boost circuit in the regulating module to boost the 2.5V voltage signal, and output a 5V voltage signal to the control module to meet the needs of the control module.

[0063] It should be noted that the regulating module may also include circuits such as filter circuits for regulating voltage signals, and the regulating module may include one or more circuits such as voltage divider circuits, boost circuits, and filter circuits, which are not specifically limited here.

[0064] The disclosed embodiment also provides a vehicle, comprising the electronically controlled inverter as described above.

[0065] The vehicle disclosed in the above embodiments has the same or corresponding beneficial effects as the electric-controlled inverter disclosed in the above embodiments, and will not be described again here to avoid repetition.

[0066] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0067] The above are only specific embodiments of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power module, characterized in that: include: Power module body, magnetic core and current sensor; The power module body includes a base, a power unit located on the base, and a plurality of phase terminals extending outward from the power unit for transmitting phase current; The magnetic core is arranged in one-to-one correspondence with the phase terminal. In a plane perpendicular to the extension direction of the phase terminal, the magnetic core portion is arranged around the phase terminal and has an opening. The current sensor is arranged in one-to-one correspondence with the magnetic core, and the current sensor is placed in the opening.

2. The power module according to claim 1, characterized in that: A length of the magnetic core in an extending direction of the phase terminal is greater than a length of the current sensor in the extending direction of the phase terminal.

3. The power module according to claim 1, characterized in that: The opening is arranged on a side of the magnetic core facing away from the base.

4. The power module according to claim 3, characterized in that: The power module further comprises a circuit board, which is fixed on the base, and the current sensor is mounted on a surface of the circuit board facing the base.

5. The power module according to claim 4, characterized in that: The circuit board seals the opening.

6. The power module according to claim 5, characterized in that: Two ends of the magnetic core located at the opening pass through the circuit board.

7. The power module according to claim 1, characterized in that: The power module body further comprises a plastic-encapsulated shell, wherein the plastic-encapsulated shell covers the magnetic core; and / or the plastic-encapsulated shell covers a portion of the phase terminal corresponding to a position of the magnetic core.

8. The power module according to claim 1, characterized in that: The power module further comprises a direct copper-clad ceramic substrate. The base is a heat sink. The direct copper-clad ceramic substrate is located on a surface of the base facing the power unit. The phase terminal contacts the direct copper-clad ceramic substrate.

9. An electric controlled inverter, characterized in that: Comprising a power module as described in any one of claims 1 to 8.

10. A vehicle, characterized in that: Comprising the electronically controlled inverter as claimed in claim 9.

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