Compact vehicle drive module having improved thermal control
First Claim
1. An electric drive for a vehicle at least partially propelled by an electric motor, the drive comprising:
- a vehicle drive train;
a power converter operatively coupled to the drive train and comprising;
a power electronics circuit configured to generate controlled output power; and
an electrical and thermal subassembly to which the power electronics circuit is directly mounted, the subassembly including a fluid diverting means to direct cooling fluid into contact with an interface on which the power electronic circuit is supported and a flow regulating element to provide regulation of temperature of the power electronics circuit in a closed-loop manner.
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0 Petitions
Accused Products
Abstract
An electric vehicle drive includes a thermal support may receive one or more power electronic circuits. The support may aid in removing heat from the circuits through fluid circulating through the support, which may be controlled in a closed-loop manner. Interfacing between circuits, circuit mounting structure, and the support provide for greatly enhanced cooling. The support may form a shield from both external EMI/RFI and from interference generated by operation of the power electronic circuits. Features may be provided to permit and enhance connection of the circuitry to external circuitry, such as improved terminal configurations. Modular units may be assembled that may be coupled to electronic circuitry via plug-in arrangements or through interface with a backplane or similar mounting and interconnecting structures.
108 Citations
51 Claims
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1. An electric drive for a vehicle at least partially propelled by an electric motor, the drive comprising:
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a vehicle drive train;
a power converter operatively coupled to the drive train and comprising;
a power electronics circuit configured to generate controlled output power; and
an electrical and thermal subassembly to which the power electronics circuit is directly mounted, the subassembly including a fluid diverting means to direct cooling fluid into contact with an interface on which the power electronic circuit is supported and a flow regulating element to provide regulation of temperature of the power electronics circuit in a closed-loop manner. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An electric drive for a vehicle at least partially propelled by an electric motor, the drive comprising:
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a vehicle drive train;
a power converter for driving the drive train, the power electronic circuit being mounted on a support comprising;
a substrate having inlet and outlet ports and a circulation path coupled between the inlet and outlet ports, the inlet and outlet ports being configured to transmit a coolant for circulation through the circulation path, the substrate being made of a first material;
an interface plate configured to directly support a power electronics circuit and to be secured to the substrate, the interface plate having integral heat dissipation elements extending therefrom configured to extend into the coolant circulation path when the interface plate is mounted to the substrate for extraction of heat from the interface plate during operation, the interface plate being made of a second material different from the first material;
a fluid diverting means to direct cooling fluid into contact with the interface plate;
a flow control valve for regulating flow of cooling fluid through the coolant circulation path; and
at least one sensor for detecting temperature, and wherein the sensor is coupled to the flow control valve for closed loop control of flow of cooling fluid through the coolant circulation path. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. An electric drive for a vehicle at least partially propelled by an electric motor, the drive comprising:
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a vehicle drive train;
a plurality of controlled power electronics circuits including solid state switches configured to convert incoming power to controlled outgoing power for driving the drive train;
a fluid cooled support for supporting at least the power electronics circuits, the fluid cooled support including inlet and outlet ports for a cooling fluid and an internal fluid conduit for directing flow of cooling fluid adjacent to the power electronics circuits for removal of heat therefrom;
a plurality of interfaces on which the respective power electronics circuits are secured, the interfaces contacting cooling fluid flowing through the internal fluid conduit during operation to convectively remove heat from the power electronics circuit wherein the fluid cooled support includes a fluid diverting means to direct cooling fluid into contact with the interfaces;
a flow control valve coupled to the support for regulating flow of cooling fluid through the internal fluid conduit; and
at least one sensor for detecting temperature of a portion of the converter, and wherein the sensor is coupled to the flow control valve for closed loop control of flow of cooling fluid through the internal fluid conduit. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37)
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38. An electric drive for a vehicle at least partially propelled by an electric motor, the drive comprising:
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a vehicle drive train;
a power electronics circuit configured to produce output power for driving the drive train;
a substrate having inlet and outlet ports and a circulation path coupled between the inlet and outlet ports, the inlet and outlet ports being configured to transmit a coolant for circulation through the circulation path, the substrate being made of a first material;
an interface plate supporting the power electronics circuit and to be secured to the substrate, the interface plate having integral heat dissipation elements extending therefrom configured to extend into the coolant circulation path when the interface plate is mounted to the substrate for extraction of heat from the interface plate during operation, the interface plate being made of a second material different from the first material; and
a fluid diverting means to direct cooling fluid into contact with the interface plate;
wherein the substrate includes a plurality of heat exchange surfaces configured to cooperate with the heat exchange surfaces of the interface plate for heat transfer. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. An electric drive for a vehicle at least partially propelled by an electric motor, the drive comprising:
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a vehicle drive train;
a power converter for driving the drive train, the power electronic circuit being mounted on a support comprising;
a substrate having inlet and outlet ports and a circulation path coupled between the inlet and outlet ports, the inlet and outlet ports being configured to transmit a coolant for circulation through the circulation path, the substrate being made of a first material;
an interface plate configured to support a power electronics circuit and to be secured to the substrate, the interface plate having integral heat dissipation elements extending therefrom configured to extend into the coolant circulation path when the interface plate is mounted to the substrate for extraction of heat from the interface plate during operation, the interface plate being made of a second material different from the first; and
a fluid diverting means to direct cooling fluid into contact with the interface plate; and
wherein the substrate includes a plurality of heat exchange surfaces configured to cooperate with the heat exchange surfaces of the interface plate for heat transfer.
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50. An electric drive for a vehicle at least partially propelled by an electric motor, the drive comprising:
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a vehicle drive train;
a power converter for driving the drive train, the power electronic circuit being mounted on a support comprising;
a substrate having inlet and outlet ports and a circulation path coupled between the inlet and outlet ports, the inlet and outlet ports being configured to transmit a coolant for circulation through the circulation path, the substrate being made of a first material;
an interface plate configured to support a power electronics circuit and to be secured to the substrate, the interface plate having integral heat dissipation elements extending therefrom configured to extend into the coolant circulation path when the interface plate is mounted to the substrate for extraction of heat from the interface plate during operation, the interface plate being made of a second material different from the first material; and
a diverter disposed within the coolant circulation path to control flow of cooling fluid therethrough.
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51. An electric drive for a vehicle at least partially propelled by an electric motor, the drive comprising:
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a vehicle drive train;
a power converter for driving the drive train, the power electronic circuit being mounted on a support comprising;
a substrate having inlet and outlet ports and a circulation path coupled between the inlet and outlet ports, the inlet and outlet ports being configured to transmit a coolant for circulation through the circulation path, the substrate being made of a first material; and
an interface plate configured to support a power electronics circuit and to be secured to the substrate, the interface plate having integral heat dissipation elements extending therefrom configured to extend into the coolant circulation path when the interface plate is mounted to the substrate for extraction of heat from the interface plate during operation, the interface plate being made of a second material different from the first material the interface plate being removably secured to the substrate.
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Specification