Electronic control system for electric machine and electrical assembly
By integrating a second electronic subassembly with reduced dimension sensors and peripheral connections, the system addresses temperature measurement inaccuracies and cooling inefficiencies, improving the electronic control system's accuracy and efficiency.
Patent Information
- Application Number
- FR2019005245
- Authority / Receiving Office
- FR · FR
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2019-05-20
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2039-05-20
AI Technical Summary
Existing electronic control systems for electric machines face challenges in accurately measuring the temperature of power electronic components due to heat losses between the components and temperature sensors, which are often distant, and suffer from reduced cooling efficiency and space constraints due to bulky interconnectors and centralized control pin connections.
The system integrates a second electronic subassembly with a current and/or temperature sensor closer to the power electronic module, using a magnetic core with a Hall effect sensor and reduced dimensions to minimize heat loss and increase cooling airflow, while allowing peripheral connection of control pins for improved component spacing.
This configuration enhances temperature measurement accuracy and cooling efficiency by reducing heat losses and increasing available space for components, thus optimizing the electronic control system's performance and cost.
Smart Images
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Abstract
Description
Title of the invention: Electronic control system for electric machine and electrical assembly
[0001] The invention relates to an electronic control system for an electric machine as well as to an electrical assembly comprising such an electronic system and an electric machine.
[0002] In a known manner, an electronic control system for an electrical machine comprises:
[0003] - an electronic power module allowing the conversion of a direct current to an alternating current, the electronic power module comprising:
[0004] - a first bus bar and a second bus bar allowing a power supply power electronic module with direct current,
[0005] - a third bus bar capable of supplying a phase winding of a rotating electric machine,
[0006] - a control pin receiving a control signal allowing to control the power electronic module,
[0007] - an electronic control module separate from the electronic power module and configured to generate the control signal.
[0008] To ensure good control of the power electronic module, it is important to evaluate the temperature of a power electronic component, such as a controllable switch of a switching arm, of the power electronic module. French patent application No. 1855045 proposes measuring this temperature using a temperature sensor, for example a thermistor, carried by the electronic card of the electronic control module, the heat of the power electronic components being conducted to the temperature sensor by an electrical conductor connected to one of the bus bars or the control pin. In this type of temperature measurement means, the temperature sensor is far from the power electronic component whose temperature is to be known. The accuracy of the temperature measurement is therefore reduced due to heat losses between the power electronic component and the temperature sensor.
[0009] It has been considered to position the temperature sensor in the power electronic module close to the power electronic component. However, the manufacturing process of the power electronic module can make it difficult or even impossible to integrate the temperature sensor into the power electronic module. This is the case in particular when the power electronic module is produced using a TML (Transfer Molded Leadframe) type technology. in French transfer molded bus bar) where an electrical insulator is overmolded onto the bus bars, the control pin and the power electronic component. The electrical insulator is for example an epoxy type thermosetting resin.
[0010] It is known to use an interconnector separate from the power electronic module to connect the third bus bar of the power electronic module to the phase winding of the rotating electrical machine. Such an interconnector is presented in patent application FR3068564 A1. The interconnector comprises a conductive part electrically connecting the third bus bar to the phase winding of the rotating electrical machine as well as a magnetic torus. The magnetic torus surrounds the conductive part. The torus has a notch in which a Hall effect sensor can be placed. A voltage dependent on the magnetic field is generated by the current flowing in the conductive part. The interconnector may further comprise a housing overmolded on the conductive part and the toroid. The use of such an interconnector allows a simplification of the power electronic module and the manufacturing of the power electronic module. Indeed, particularly in the case of a power electronic module produced by the TML process, it is difficult to overmold the housing on a third bus bar which would have been bent so as to receive a magnetic toroid to be integrated into the overmolding. However, the use of such an interconnector has the disadvantage of being bulky and therefore of reducing the possibilities of cooling air flow in the electronic control system. In patent application FR3068564 A1, the axis of the magnetic toroid is parallel to the general orientation plane of the power electronic module.The interconnector therefore has thick parts whose thickness is at least equal to the outer diameter of the magnetic core. These thick parts reduce the possibilities of cooling air flow in the electronic control system.
[0011] It is known to connect the control pin directly to the electronic control module as for example in patent application FR3068541 AL The position of the connection of the control pin to the electronic control module is therefore constrained by the position of the control pin on the electronic power module. The position of the connection of the control pin can therefore be located in a central area of the electronic control module which has the disadvantage of reducing the space available for arranging the electronic control components of the electronic control module.
[0012] The present invention aims to eliminate all or part of these drawbacks.
[0013] The invention relates to an electronic system comprising:
[0014] - an electronic power module allowing the conversion of a direct current to an alternating current, the electronic power module comprising:
[0015] - a first bus bar and a second bus bar allowing a power supply power electronic module with direct current,
[0016] - a third bus bar capable of supplying a phase winding of a rotating electric machine,
[0017] - a control pin receiving a control signal allowing to control the power electronic module,
[0018] - an electronic control module separate from the electronic power module and configured to generate the control signal, the electronic control module comprising:
[0019] - a first electronic subassembly comprising at least a first trace and at least one electronic control component, the at least one electronic control component being electrically connected to the at least one first trace,
[0020] - a second electronic subassembly distinct from the first electronic subassembly electronics and comprising an electronic control device for generating the control signal and / or an electronic measuring device for measuring an operating parameter of the power electronic module,
[0021] the second electronic subassembly being connected to the first electronic subassembly by a first control pin.
[0022] The use of an electronic control module comprising such a second electronic subassembly can make it possible to bring the electronic control device which generates the control signal closer to the electronic power module. Thus it is possible to shorten the length of the electrical connections between the electronic control device and the electronic power module. This can make it possible to significantly reduce the cost of the electronic system. For example, in the case of an electronic power module produced using TML type technology, it is possible to reduce the dimensions of the conductive metal plate, for example a copper plate, from which the various bus bars of the electronic power module are produced.
[0023] An example of embodiment of a first electronic subassembly distinct from a second electronic subassembly is obtained for example by providing for the first electronic subassembly, a first support and for the second electronic subassembly, a second support, the first support and the second support being at a distance from each other.
[0024] According to an additional characteristic of the invention, the electronic measuring device is a current sensor.
[0025] According to an additional characteristic of the invention, the electronic power module extends in a first plane and one end of the third bus bar is perpendicular to the first plane.
[0026] According to an additional characteristic of the invention, the current sensor comprises a magnetic core having an air gap and a Hall effect sensor arranged in the air gap to measure the current passing through a conductor passing through the magnetic core, the third bus bar passing through the magnetic core or the magnetic core being capable of being passed through by the phase winding of the rotating electrical machine.
[0027] According to an additional characteristic of the invention, the height of the current sensor in the direction of the axis of the magnetic torus is less than its width and its length in the plane perpendicular to the axis of the magnetic torus.
[0028] The use of a current sensor whose magnetic core is crossed by the third bus bar or a phase winding oriented in the direction perpendicular to the first plane in which the power electronic module extends makes it possible to reduce the size in the direction perpendicular to the first plane. This reduction in size makes it possible, for example, in particular in the case of an air-cooled electronic control system, to provide more space for the passage of the cooling air flow. Better cooling of the electronic control system is therefore possible.
[0029] According to an additional characteristic of the invention, the electronic measuring device is a temperature sensor.
[0030] The implantation of the temperature sensor on the second electronic subassembly makes it possible to bring the temperature sensor closer to the power electronic module. This makes it possible to improve the accuracy of the temperature measurement. This improvement is obtained in particular when the temperature sensor is thermally connected to an electrical conductor electrically connecting the power electronic module to the second electronic subassembly. The length of the electrical conductor can be reduced so as to limit heat losses into the environment.
[0031] According to an additional characteristic of the invention:
[0032] - the second electronic subassembly comprises a second connected trace electrically to the first control pin,
[0033] - the first electronic subassembly comprises an electronic circuit of order,
[0034] - the first control pin is electrically connected to the electronic circuit order.
[0035] According to an additional characteristic of the invention:
[0036] - at least one second control pin is electrically connected to one of the first bus bar, second bus bar, third bus bar and control pin,
[0037] - the second trace is electrically connected to the second control pin.
[0038] The use of a second trace of the second electronic subassembly to electrically connect the first control pin to the second control pin allows the second electronic subassembly to provide an interconnection function between the power electronic module and the first electronic subassembly. It is thus possible to position the electrical connections to the first electronic subassembly in an improved manner. It is for example possible to position these electrical connections on a peripheral zone of the first electronic subassembly so as to increase the space available for the electronic components of the first electronic subassembly.
[0039] According to an additional characteristic of the invention, the first control pin is distinct from the second trace and / or the second trace is distinct from the second control pin.
[0040] According to an additional characteristic of the invention, the second electronic subassembly further comprises a thermal connection between the second trace and the temperature sensor.
[0041] The thermal connection allows the conduction of heat between the second trace and the temperature sensor. It is thus possible to evaluate the temperature of a component electrically connected to the second trace, for example the temperature of a component of the power electronic module.
[0042] According to an additional characteristic of the invention, the second electronic subassembly further comprises a housing securing the second trace and the electronic control device and / or an electronic measuring device, in particular a housing overmolded on the second trace and the electronic control device and / or an electronic measuring device.
[0043] According to an additional characteristic of the invention, the second electronic subassembly comprises an electronic card on which the second trace is arranged and carrying the control device and / or the measuring device.
[0044] The invention also relates to an electrical assembly comprising:
[0045] - an electronic system as described previously,
[0046] - a rotating electrical machine.
[0047] The invention may be better understood by reading the following description of non-limiting examples of its implementation and by examining the attached drawing in which:
[0048] - [Fig.l] [Fig.l] represents an electrical diagram of an electrical assembly comprising an electronic system according to the invention,
[0049] - [Fig.2] [Fig.2] represents a schematic view in partial section of a system electronics according to a first embodiment of the invention,
[0050] - [Fig.3] [Fig.3] represents a partial schematic view of the electronic system of [Fig.2],
[0051] - [Fig.4] [Fig.4] represents another partial schematic view of the electrical system tronics of [Fig.2],
[0052] - [Fig.5] [Fig.5] represents a partial schematic sectional view of a system electronics according to a second embodiment,
[0053] - [Fig.6] [Fig.6] represents a partial schematic view of the electronic system of [Fig.5],
[0054] - [Fig.7] [Fig.7] represents another partial schematic view of the electrical system tronics of [Fig.5].
[0055] In all the figures, identical elements or elements providing the same function bear the same reference numbers. The following embodiments are examples. Although the description refers to one or more embodiments, this does not necessarily mean that each reference relates to the same embodiment or that the characteristics apply only to a single embodiment. Single characteristics of different embodiments may also be combined or interchanged to provide other embodiments.
[0056] [Fig.l] represents an electrical assembly 100 in which the invention can be implemented.
[0057] The electrical assembly 100 is for example intended to be installed in a motor vehicle.
[0058] The electrical assembly 100 firstly comprises an electrical power source 102 designed to provide a direct voltage U, for example between 20 V and 100 V, for example 48 V. The electrical power source 102 comprises for example a battery.
[0059] The electrical assembly 100 further comprises a rotating electrical machine 130 comprising several phase windings (not shown) intended to present respective phase voltages.
[0060] The electrical assembly 100 further comprises an electronic system 104.
[0061] In the different embodiments shown in the figures, the electronic system 104 is a voltage converter 104. However, in other embodiments not shown, the assembly can perform a different function.
[0062] The voltage converter 104 is connected between the electrical power source 102 and the electrical machine 130 to perform a conversion between the DC voltage U and the phase voltages.
[0063] The voltage converter 104 firstly comprises a positive electrical line 106 and a negative electrical line 108 intended to be connected to the electrical power source 102 to receive the direct voltage U, the electrical line positive 106 receiving a high electrical potential and the negative electrical line 108 receiving a low electrical potential. The negative electrical line receives for example a zero potential and is connected to a ground of the motor vehicle.
[0064] The voltage converter 104 further comprises at least one electronic power module 110 comprising one or more phase electrical lines 122 intended to be respectively connected to one or more phases of the electrical machine 130, to provide their respective phase voltages.
[0065] In the example described, the voltage converter 104 comprises three electronic power modules 110 each comprising two phase electrical lines 122 connected to two phases of the electrical machine 130.
[0066] More specifically, in the example described, the electrical machine 130 comprises two three-phase systems each comprising three phases, and intended to be electrically phase-shifted by 120° relative to each other. Preferably, the first phase electrical lines 122 of the power electronic modules 110 are respectively connected to the three phases of the first three-phase system, while the second phase electrical lines 122 of the power electronic modules 110 are respectively connected to the three phases of the second three-phase system.
[0067] Each electronic power module 110 comprises, for each phase electrical line 122, a first controllable switch 112 connected between the positive electrical line 106 and the phase electrical line 122 and a second controllable switch 114 connected between the phase electrical line 122 and the negative electrical line 108. Thus, the controllable switches 112, 114 are arranged so as to form a chopping arm, in which the phase electrical line 122 forms a midpoint.
[0068] Each controllable switch 112, 114 comprises first and second main terminals 116, 118 and a control terminal 120 intended to selectively open and close the controllable switch 112, 114 between its two main terminals 116, 118 as a function of a control signal applied thereto. The controllable switches 112, 114 are preferably transistors, for example metal-oxide-semiconductor field effect transistors (MOSFETs) having a gate forming the control terminal 120, and a drain and a source respectively forming the main terminals 116, 118.
[0069] In the example described, the controllable switches 112, 114 each have the shape of a plate, for example substantially rectangular, having an upper face and a lower face. The first main terminal 116 extends on the lower face, while the second main terminal 118 extends on the upper face. In addition, the lower face forms a heat dissipation face.
[0070] The voltage converter 104 further comprises, for each electronic power module 110, a filtering capacitor 124 having a first terminal 126 and a second terminal 128 respectively connected to the positive electrical line 106 and to the negative electrical line 108.
[0071] It will be appreciated that the positive electrical line 106, the negative electrical line 108 and the phase electrical lines 122 are rigid elements designed to withstand electrical currents of at least 1 A. They preferably have a thickness of at least 1 mm.
[0072] Furthermore, in the example described, the electrical machine 130 has both an alternator and an electric motor function. More specifically, the motor vehicle further comprises a heat engine (not shown) having an output shaft to which the electrical machine 130 is connected, for example, by a belt or a chain or a gear train (not shown). The heat engine is intended to drive wheels of the motor vehicle via its output shaft. Thus, when operating as an alternator, the electrical machine supplies electrical energy to the electrical power source 102 from the rotation of the output shaft. The voltage converter 104 then operates as a rectifier. When operating as an electric motor, the electrical machine drives the output shaft (in addition to or instead of the heat engine). The voltage converter 104 then operates as an inverter.
[0073] The electrical machine 130 is for example located in a gearbox or in a clutch of the motor vehicle or in place of the alternator.
[0074] [Fig.2], [Fig.3] and [Fig.4] represent an electronic system 104 according to a first embodiment.
[0075] The electronic system 104 comprises:
[0076] - the electronic power module 110 allowing the conversion of a current direct current to alternating current, the electronic power module 110 comprising:
[0077] - a first bus bar 206 and a second bus bar 208 allowing a power supply of the electronic power module with direct current,
[0078] - a third bus bar 522 capable of supplying a phase winding 810 of a rotating electrical machine,
[0079] - a control pin 150 receiving a control signal allowing control the 110 power electronic module.
[0080] The first bus bar 206 is electrically connected to the positive power line 106. The second bus bar 208 is electrically connected to the negative power line 108. The third bus bar 522 is electrically connected to the phase power line 122. The control pin 150 is electrically connected trically to control terminal 120.
[0081] The electronic power module 110 may further comprise an overmolded box 550 on the first controllable switch 112, the second controllable switch 114, the first bus bar 206, the second bus bar 208, the third bus bar 522 and the control pin 150. The electronic power module is for example produced using TML type technology.
[0082] The electrical system 104 may further comprise a heat sink 502.
[0083] The power electronic module 110 is fixed on the heat sink 502 at using a fixing means not shown.
[0084] The power electronic module 110 comprises a heat dissipation surface. This heat dissipation surface is in thermal contact with a heat exchange surface of the heat sink 502. The thermal contact is for example made using a thermal paste or a thermal glue.
[0085] In this first embodiment, the heat sink 502 may comprise a pipe 530. The pipe 530 is for example connected to a cooling circuit in which a heat transfer fluid, in particular an aqueous-based cooling liquid, can circulate.
[0086] The electrical system 104 further comprises:
[0087] - an electronic control module separate from the electronic power module and configured to generate the control signal, the electronic control module comprising:
[0088] - a first electronic subassembly 700 comprising at least one first trace 710 and at least one electronic control component 720, the at least one electronic control component being electrically connected to the at least one first trace 710,
[0089] - a second electronic subassembly 900 distinct from the first subassembly electronics 700 and comprising an electronic measuring device making it possible to measure an operating parameter of the electronic power module.
[0090] In other words, the first electronic subassembly 700 comprises a first support and the second electronic subassembly 900 comprises a second support, the first support and the second support being at a distance from each other.
[0091] The second electronic subassembly 900 is connected to the first electronic subassembly by a first control pin 140.
[0092] The second electronic subassembly 900 comprises a second trace 930.
[0093] At least one second control pin 160 is electrically connected to one of the first bus bar 206, second bus bar 208, third bus bar 522 and control pin 150.
[0094] In the embodiments shown in Figures 2 to 7, a plurality of second control pins 160 is used. One of the second control pins 160 is the control pin 150. Another second control pin 160 is for example connected to the first bus bar 206. Another second control pin 160 is for example connected to the third bus bar 522.
[0095] The second control pin 160 can be connected to the second trace 930.
[0096] The second trace 930 is electrically connected to the first control pin 140.
[0097] In the embodiments of Figures 2 to 7, the first control pin 140 is distinct from the second trace 930 and the second trace 930 is distinct from the second control pin 160.
[0098] The first electronic subassembly 700 may comprise a first electronic card 730 carrying the electronic control component 720.
[0099] The first support of the first electronic subassembly 700 is for example the first electronic card 730.
[0100] The first control pin 140 is electrically connected to the electronic control component 720.
[0101] The second electronic subassembly 900 may comprise a second electronic card 410. The second trace 930 is for example a metal trace formed on the second electronic card 410.
[0102] The second support of the second electronic subassembly 900 is for example the second electronic card 410.
[0103] In another embodiment not shown, the second subassembly 900 comprises a housing overmolded on the second trace 930. The overmolded housing is for example made of an epoxy resin. The second subassembly 900 is for example made with a TML type technology.
[0104] In another embodiment not shown, the first control pin 140 is made in material continuity with the second trace 930.
[0105] In another embodiment not shown, the second control pin 160 is made in material continuity with the second trace 930.
[0106] In another embodiment not shown, the first control pin 140 and the second control pin 160 are made in material continuity with the second trace 930.
[0107] The electronic measuring device of the second electronic subassembly 900 is for example a current sensor 910.
[0108] The current sensor 910 may comprise a magnetic core 430 and a Hall effect sensor 440. The magnetic core 430 has an air gap in which the Hall effect sensor 440 is disposed to measure the current passing through an electrical conductor passing through the magnetic core 430.
[0109] The height of the current sensor 910 in the direction of the axis of the magnetic torus 430 is less than its width and its length in the plane perpendicular to the axis of the magnetic torus 430.
[0110] The height of the current sensor 910 is for example at least twice as small as its width and its length.
[0111] A magnetic torus support 432 may be overmolded onto the magnetic torus 430. The magnetic torus support 432 is for example fixed to the second electronic card 410 by means of fixing means 433. The fixing means 433 are for example screws or protrusions of the magnetic torus support 432 hot-crimped onto the second electronic card 410.
[0112] In the embodiments of Figures 2 to 7, the current sensor 910 allows the measurement of the current passing in the phase winding 810.
[0113] In the embodiments of Figures 2 to 7, the phase winding 810 passes through the magnetic core 430.
[0114] In another embodiment not shown, the third bus bar 522 passes through the magnetic core.
[0115] The power electronic module 110 extends in a first plane. The third bus bar 522 has an end perpendicular to the first plane. The perpendicular end of the third bus bar 522 is connected to the phase winding 810 which has the same orientation as the end of the third bus bar.
[0116] The third bus bar 522 and the phase winding 810 are for example electrically and mechanically connected by brazing / welding or by crimping (not shown).
[0117] The second electronic subassembly 900 has an orientation parallel to the first plane. The axis of the current sensor 910 is perpendicular to the orientation of the second electronic subassembly 900.
[0118] The height of the current sensor 910 being less than its length and its width, it is possible to have a second electronic subassembly 900 whose thickness is reduced.
[0119] The electronic measuring device of the second electronic subassembly 900 may also be a temperature sensor 450, for example a thermistor.
[0120] The second electronic subassembly may further comprise a thermal connection between the second trace 930 and the temperature sensor 450.
[0121] The thermal connection comprises for example a thermally conductive trace 940 in particular a metal trace in particular a copper trace. The temperature sensor 450 is in thermal contact with the thermally conductive trace 940. The thermal contact is for example made by direct contact or using thermal paste or thermal glue. The thermally conductive trace 940 is for example welded to the second trace 930 to allow heat conduction between the second trace 930 and the thermally conductive trace 940. In the embodiment of [Fig.4], the second trace 930 and the thermally conductive trace 940 are formed in continuity of material. In another embodiment the second trace 930 and the thermally conductive trace 940 form a single trace.
[0122] Such a temperature sensor 450 can make it possible to evaluate the temperature of the power electronic module 110. The heat generated by the power electronic module 110 is transmitted by thermal conduction by the second control pin 160 and the second trace 930 to the thermal connection and to the temperature sensor.
[0123] The second electronic subassemblies of the embodiments shown in Figures 2 to 7 include both a temperature sensor 450 and a current sensor 910.
[0124] In the embodiment of [Fig.2], [Fig.3] and [Fig.4], the second electronic subassembly 900 also comprises an electronic control device 920 for generating the control signal. As seen previously, the control signal is sent to the control terminal 120 of a controllable switch of the electronic power module 110 to selectively open and close the controllable switch 112, 114.
[0125] In another embodiment not shown, the second electronic subassembly 900 does not comprise an electronic measuring device making it possible to measure an operating parameter of the electronic power module 110 but comprises an electronic control device 920 making it possible to generate the control signal.
[0126] In another embodiment not shown, the second electronic subassembly 900 comprises the electronic measuring device 910, 450 making it possible to measure an operating parameter of the electronic power module 110 but does not comprise an electronic control device making it possible to generate the control signal.
[0127] The first electronic subassembly 700 has an orientation parallel to the orientation of the second electronic subassembly 900.
[0128] The electronic system 104 may have a generally circular cylindrical shape whose axis is perpendicular to the first plane. The first electronic subassembly 700 and the second electronic subassembly 900 may have a disc shape.
[0129] The second electronic subassembly 900, the first control pin 140, the second control pin 160 can form an interconnection module between the power electronic module 110 and the first electronic subassembly 700. The interconnection module makes it possible to reduce the positioning constraints of the electrical connection of the first control pin 140 to the first electronic subassembly 700 relative to the positioning of the second control pin 160. It is thus, for example, possible to position the electrical connection of the first control pin 140 to the first electronic subassembly 700 on the outside of the first electronic subassembly 700. This position makes it possible to reduce the routing constraints of the first electronic subassembly 700 and to increase the space available for the electronic components of the first electronic subassembly 700.
[0130] In the first embodiment shown in Figures 2 to 4, the first electronic subassembly 700, the heat exchanger 502, the electronic power module 110 and the second electronic subassembly 900 are arranged successively in parallel planes.
[0131] The position of the heat exchanger between the first electronic subassembly 700 and the power electronic module 110 allows on the one hand the cooling of the power electronic module 110 as seen previously but also of the first electronic subassembly 700. The first electronic subassembly 700 comprises a heat dissipation surface. This heat dissipation surface is in thermal contact with a heat exchange surface of the heat sink 502. The thermal contact is for example made using a thermal paste or a thermal glue.
[0132] A first cover 300 can be fixed on the heat sink 502 to protect the second electronic subassembly 900 in particular from water projection and the intrusion of other pollutants.
[0133] A second cover 600 may be attached to the heat sink on the heat sink 502 opposite the first cover 300.
[0134] The first cover 300, the heat sink 502 and the second cover 600 can form a composite housing to protect the second electronic subassembly 900, the power electronic module 110, the first electronic subassembly 700 as well as connection elements such as the first control pin 140 and the second control pin 160.
[0135] [Fig.5], [Fig.6] and [Fig.7] represent an electronic system 104 according to a second embodiment.
[0136] In the second embodiment, the heat sink 502 is cooled by means of a heat exchange with the ambient air. Cooling fins 540 located on the surface of the heat sink 502 opposite the heat exchange surface between the power electronic module 110 and the heat sink 502 can improve cooling by increasing the heat exchange surface with the ambient air.
[0137] In the second embodiment, the heat exchanger 502, the electronic power module 110, the second electronic subassembly 900 and the first electronic subassembly 700 are arranged successively in parallel planes.
[0138] A cover 300 fixed on the heat sink 502 makes it possible to protect the electronic power module 110, the second electronic subassembly 900, the first electronic subassembly 700 as well as the connection elements such as the first control pin 140 and the second control pin 160.
[0139] In an alternative embodiment not shown, openings are provided in the cover to allow the passage of an air flow between the electronic power module 110 and the first electronic subassembly 700.
[0140] The low height of the current sensor 910 described above limits obstruction of the air passage by the current sensor 910.
[0141] In another variant embodiment not shown, the first electronic subassembly 700 is supported by a support box, for example fixed to the heat sink 502.
Claims
Claims
1. Electronic system (104) comprising: a. a power electronic module (110) enabling the conversion of a direct current to an alternating current, the power electronic module (110) comprising: i. a first bus bar (206) and a second bus bar (208) enabling the power electronic module (110) to be supplied with the direct current, ii. a third bus bar (522) capable of supplying a phase winding (810) of a rotating electrical machine (130), iii. a control pin (150) receiving a control signal for controlling the power electronic module (110), b. an electronic control module separate from the power electronic module (110) and configured to generate the control signal, the electronic control module comprising: i. a first electronic subassembly (700) comprising at least one first trace (710) and at least one electronic control component, the at least one electronic control component being electrically connected to the at least one first trace (710), ii. a second electronic subassembly (900) distinct from the first electronic subassembly (700) and comprising an electronic control device (920) for generating the control signal and / or a current sensor (910, 440) for measuring an operating parameter of the power electronic module (110), the second electronic subassembly (900) being connected to the first electronic subassembly (700) by a first pin of control (140), the current sensor (910) comprises a magnetic core (430) having an air gap and a Hall effect sensor (440) arranged in the air gap to measure the current passing through a conductor passing through the magnetic core, the third bus bar (522) passing through the magnetic core or the magnetic core (430) being capable of being passed through by the phase winding (810) of the rotating electrical machine (130).
2. Electronic system according to the preceding claim in which the power electronic module (110) extends in a first plane and in which one end of the third bus bar (522) is perpendicular to the first plane.
3. Electronic system (104) according to claim 1 wherein the electronic measuring device is a temperature sensor (450).
4. Electronic system (104) according to one of the preceding claims wherein: a. the second electronic subassembly (900) comprises a second trace (930) electrically connected to the first control pin (140), b. the first electronic subassembly (700) comprises an electronic control circuit, c. the first control pin (140) is electrically connected to the electronic control circuit.
5. An electronic system (104) according to the preceding claim wherein: a. at least one second control pin (160) is electrically connected to one of the first bus bar (206), second bus bar (208), third bus bar (522) and control pin (150), b. the second trace (930) is electrically connected to the second control pin (160).
6. The electronic system (104) of claim 5 wherein the first control pin (140) is distinct from the second trace (930) and / or the second trace (930) is distinct from the second control pin (160).
7. Electronic system (104) according to one of claims 4 to 6 taken in combination with claim 5 wherein the second electronic subassembly (900) further comprises a thermal connection between the second trace (930) and the temperature sensor (450).
8. Electronic system (104) according to one of claims 4 to 7 in which the second electronic subassembly (900) further comprises a housing securing the second trace (930) and the electronic control device and / or an electronic measurement device (810, 450), in particular a housing overmolded on the second trace (930) and the electronic control device and / or the electronic measurement device (810, 450).
9. Electronic system (104) according to one of the preceding claims in which the second electronic subassembly (900) comprises an electronic card (410) on which the second trace (930) is arranged and carrying the control device (920) and / or the measuring device (810, 450).
10. Electrical assembly (100) comprising: a. an electronic system (104) according to one of the preceding claims, b. a rotating electrical machine (130).