Current sensor module, motor driving assembly and vehicle

Abstract

The utility model relates to a current sensor module, a motor driving assembly and a vehicle, the current sensor module comprises a first signal terminal and a second signal terminal which are formed on a circuit controller, the first signal terminal is connected with a motor, and the second signal terminal is connected with a motor controller; the current sensing device is suitable for detecting the current change of the connecting copper bar; wherein the first signal terminal and the second signal terminal are suitable for transmitting temperature signals, resolver signals and current signals between the circuit controller and the motor controller. According to the utility model, the current sensor module detects the current change in the connecting copper bar through the current sensing device and transmits the current change to the circuit controller, and the circuit controller is provided with the first signal terminal and the second signal terminal which can transmit a temperature signal, a resolver signal and a current signal transmitted from the motor to the motor controller. Therefore, a temperature signal, a rotary transformer signal and a current signal can be simultaneously transmitted between the motor and the motor controller.

Description

Technical Field

[0001] The utility model relates to the field of vehicles, and particularly relates to a current sensor module, a motor drive assembly and a vehicle. Background Art

[0002] In the related art, current motor controllers usually separately design and then splice together the connection copper bar integrated with the current sensing device and the resolver plug-in, and install each device in the motor controller housing separately. The product integration degree is low and the anti-interference ability is weak. At the same time, the connection copper bar, the current sensing device and the resolver plug-in all work independently, and their connectivity to each other is poor, and they cannot simultaneously transmit the temperature signal, the resolver signal and the current signal sent from the motor to the motor controller. Content of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a current sensor module. The current sensor module according to the utility model is connected to the circuit controller through the current sensing device. The current sensing device can detect the current change in the connection copper bar and transmit it to the circuit controller, and then the circuit controller transmits it to the motor controller. The circuit controller is formed with a first signal terminal and a second signal terminal for transmitting the temperature signal and the resolver signal sent from the motor to the motor controller, thereby realizing the simultaneous transmission of the temperature signal, the resolver signal and the current signal between the motor and the motor controller.

[0004] The utility model also provides a motor drive assembly having the above current sensor module.

[0005] The utility model also provides a vehicle having the above motor drive assembly.

[0006] The current sensor module according to the utility model includes: a housing; a circuit controller disposed in the housing, the circuit controller being formed with a first signal terminal and a second signal terminal, the first signal terminal being connected to the motor, and the second signal terminal being connected to the motor controller; a connection copper bar disposed on the housing, the connection copper bar being adapted to connect the motor and the motor controller; a current sensing device disposed in the housing and connected to the circuit controller, the current sensing device being adapted to detect the current change in the connection copper bar and transmit it to the circuit controller to be converted into a current signal; wherein the first signal terminal and the second signal terminal are adapted to transmit the temperature signal, the resolver signal and the current signal between the circuit controller and the motor controller.

[0007] According to the current sensor module of the present utility model, by arranging a circuit controller, a connecting copper bar, and a current sensing device on a housing, a first signal terminal and a second signal terminal are formed on the circuit controller, the first signal terminal and the second signal terminal are respectively connected to a motor and a motor controller, the current sensing device is arranged on the outer periphery of the connecting copper bar and connected to the circuit controller, and the current sensing device can be used to detect the current change of the connecting copper bar and transmit it to the circuit controller to be converted into a current signal, thereby realizing the simultaneous transmission of temperature signals, resolver signals, and current signals between the motor and the motor controller.

[0008] According to some embodiments of the present utility model, the housing, the circuit controller, the connecting copper bar, and the current sensing device are integrally injection molded.

[0009] According to some embodiments of the present utility model, the first signal terminal is arranged on one side of the circuit controller in the thickness direction, the second signal terminal is arranged on the other side of the circuit controller in the thickness direction, and the first signal terminal and the second signal terminal extend in directions away from each other.

[0010] According to some embodiments of the present utility model, the current sensing device includes: a sensor, the sensor is arranged around the outer periphery of the connecting copper bar and connected to the circuit controller, and the sensor is adapted to detect the magnitude of the current in the connecting copper bar and be converted into a current signal by the circuit controller and transmitted to the motor controller.

[0011] According to some embodiments of the present utility model, the sensor includes: a ferromagnetic coil, the ferromagnetic coil is arranged around the outer periphery of the connecting copper bar, and a notch is formed on the ferromagnetic coil; a Hall component, the Hall component is arranged on the circuit controller, the Hall component extends towards the ferromagnetic coil and is arranged in the notch; wherein the ferromagnetic coil and the Hall chip are adapted to detect the change of the magnetic flux in the connecting copper bar and be converted into a current signal by the circuit controller and transmitted to the motor controller.

[0012] According to some embodiments of the present utility model, the current sensing device is plugged and connected to the circuit controller.

[0013] According to some embodiments of the present utility model, a plurality of sub-copper bars are arranged on the connecting copper bar, a boss is formed on the housing, and the boss is arranged between two adjacent sub-copper bars.

[0014] According to some embodiments of the present utility model, a groove is formed at the edge of the housing facing the motor controller; the current sensor module further includes: a sealing member, and the sealing member is arranged in the groove to seal the connection between the housing and the motor controller.

[0015] The motor drive assembly according to the present utility model will be briefly described below.

[0016] The electric drive assembly according to the present utility model is provided with the current sensor module in the above-mentioned embodiment. Since the motor drive assembly according to the present utility model is provided with the current sensor module in the above-mentioned embodiment, the reliability and safety of the motor drive assembly according to the present application during operation are higher.

[0017] The vehicle according to the present utility model will be briefly described below.

[0018] The vehicle according to the present utility model is provided with the motor drive assembly in the above-mentioned embodiment. Since the vehicle according to the present utility model is provided with the motor drive assembly in the above-mentioned embodiment, the stability and reliability of the vehicle according to the present application during driving are higher. The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0019] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0020] Figure 1 is a side view of a current sensor module according to an embodiment of the present utility model;

[0021] Figure 2 is an internal structure diagram of a current sensor module according to an embodiment of the present utility model;

[0022] Figure 3 is a schematic diagram of the internal electrical connection relationship of an electric drive assembly according to an embodiment of the present utility model.

[0023] Reference Signs:

[0024] 100, current sensor module;

[0025] 11, housing;

[0026] 12, circuit controller; 121, first signal terminal; 122, second signal terminal;

[0027] 13, connecting copper bar; 131, boss;

[0028] 14, iron core coil; 15, Hall element. Detailed Embodiments

[0029] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0030] In the related art, current motor controllers usually separately design and then piece together the connection copper bar integrated current sensing device and the resolver plug-in. Each device is installed in the motor controller housing separately. The product integration degree is low and the anti-interference ability is weak. At the same time, the connection copper bar, the current sensing device and the resolver plug-in all work independently, and their connectivity to each other is poor, and they cannot simultaneously transmit the temperature signal, the resolver signal and the current signal sent from the motor to the motor controller.

[0031] Next, reference will be made to Figures 1 - 3 describe the current sensor module according to an embodiment of the present utility model.

[0032] The current sensor module 100 according to the present utility model includes: a housing 11, a circuit controller 12, a connection copper bar 13 and a current sensing device. The circuit controller 12 is disposed in the housing 11. A first signal terminal 121 and a second signal terminal 122 are formed on the circuit controller 12. The first signal terminal 121 is connected to the motor, and the second signal terminal 122 is connected to the motor controller. The connection copper bar 13 is disposed on the housing 11, and the connection copper bar 13 is adapted to connect the motor and the motor controller. The current sensing device is disposed in the housing 11 and is connected to the circuit controller 12. The current sensing device is adapted to detect the current change of the connection copper bar 13 and transmit it to the circuit controller 12 to be converted into a current signal. Wherein the first signal terminal 121 and the second signal terminal 122 are adapted to convey the temperature signal, the resolver signal and the current signal between the circuit controller 12 and the motor controller.

[0033] In some specific embodiments, the current sensor module 100 includes a housing 11, a circuit controller 12, a connecting copper bar 13, and a current sensing device. The circuit controller 12, the connecting copper bar 13, and the current sensing device are all disposed on the housing 11. The housing 11 is fixed to the joint of the motor controller and the motor by bolts, realizing the connection of the current sensor module 100 with the motor controller and the motor. The circuit controller 12 is formed with a first signal terminal 121 and a second signal terminal 122. The first signal terminal 121 and the second signal terminal 122 are respectively connected to the motor and the motor controller. The first signal terminal 121 can receive signals such as temperature and resolver from the motor, and the second signal terminal 122 can transmit signals such as temperature and resolver to the motor controller. The connecting copper bar 13 is adapted to connect the motor and the motor controller, realizing the electrical connection between the motor and the motor controller. The current sensing device is disposed on the outer periphery of the connecting copper bar 13 and is connected to the circuit controller 12. The current sensing device can be used to detect the current change of the connecting copper bar 13 and transmit it to the circuit controller 12 to be converted into a current signal. The current signal is transmitted to the motor controller through the second signal terminal 122, thus realizing the simultaneous transmission of temperature signals, resolver signals, and current signals between the motor and the motor controller.

[0034] According to some embodiments of the present invention, in the current sensor module 100, the circuit controller 12, the connecting copper bar 13, and the current sensing device are disposed on the housing 11. The circuit controller 12 is formed with a first signal terminal 121 and a second signal terminal 122. The first signal terminal 121 and the second signal terminal 122 are respectively connected to the motor and the motor controller. The current sensing device is disposed on the outer periphery of the connecting copper bar 13 and is connected to the circuit controller 12. The current sensing device can be used to detect the current change of the connecting copper bar 13 and transmit it to the circuit controller 12 to be converted into a current signal, thus realizing the simultaneous transmission of temperature signals, resolver signals, and current signals between the motor and the motor controller.

[0035] According to some embodiments of the present invention, the housing 11, the circuit controller 12, the connecting copper bar 13, and the current sensing device are integrally injection-molded. The integral injection-molding technology makes the housing 11, the circuit controller 12, the connecting copper bar 13, and the current sensing device into a whole, eliminating the looseness or gaps that may be generated due to the connection of each component in traditional assembly, improving the integration degree of the current sensor module 100, enhancing the vibration resistance and anti-interference ability of the current sensor module 100, improving the accuracy and stability of the current sensor module 100 during operation. At the same time, since the housing 11, the circuit controller 12, the connecting copper bar 13, and the current sensing device are integrated into a whole, the assembly steps between the housing 11, the circuit controller 12, the connecting copper bar 13, and the current sensing device are reduced, the manual assembly cost and time are lowered, and the production efficiency of the motor drive assembly is improved.

[0036] According to some embodiments of the utility model, the circuit controller 12 is provided with a first signal terminal 121 on one side in the thickness direction, and the circuit controller 12 is provided with a second signal terminal 122 on the other side in the thickness direction. The first terminal can be configured as an input terminal, and the second signal terminal 122 can be configured as an output terminal. The first signal terminal 121 can receive temperature, resolver and current signals from the motor and transmit these signals to the circuit controller 12. The circuit controller 12 converts these analog signals into digital signals or performs necessary amplification and filtering processing, and then transmits them to the motor controller through the second signal terminal 122, so that the motor controller controls the motor according to temperature, resolver and current changes. The first signal terminal 121 and the second signal terminal 122 extend in directions away from each other, respectively, which helps to reduce the influence of electromagnetic interference, reduce signal crosstalk, and improve the accuracy of signal transmission. At the same time, the first signal terminal 121 and the second signal terminal 122 are arranged in back to back, which facilitates the first signal terminal 121 and the second signal terminal 122 to be connected to the motor and the motor controller respectively, reducing the connection difficulty of the current sensor module 100 and improving the assembly efficiency of the current sensor module 100.

[0037] According to some embodiments of the present invention, the current sensing device includes: an inductor, which is arranged around the outer periphery of the connecting copper busbar 13 and connected to the circuit controller 12. The inductor can detect the change of the magnetic field generated by the current passing through the connecting copper busbar 13, and convert it into a corresponding current signal and output it to the circuit controller 12. The circuit controller 12 converts these analog signals into digital signals or performs necessary amplification and filtering processing, and then transmits them to the motor controller as control signals.

[0038] According to some embodiments of the utility model, the sensor includes: a ferromagnetic coil and a Hall element 15, wherein the ferromagnetic coil is arranged around the outer periphery of the connecting copper busbar 13, and a notch is formed on the ferromagnetic coil; the Hall element 15 is arranged on the circuit controller 12, and the Hall element 15 extends toward the ferromagnetic coil and is arranged in the notch; wherein the ferromagnetic coil and the Hall chip are suitable for detecting the change of magnetic flux in the connecting copper busbar 13 and converting it into a current signal by the circuit controller 12 and transmitting it to the motor controller.

[0039] In some specific embodiments, the inductor is composed of components such as a ferromagnetic coil and a Hall device 15. The ferromagnetic coil is configured as a toroidal coil, and the connecting copper bar 13 passes through the center of the ferromagnetic coil. A notch facing the circuit controller 12 is formed on the ferromagnetic coil, and a Hall device 15 is provided at the notch of the iron core coil 14. The Hall device 15 is configured as a Hall current sensor, and the output signal pins of the Hall device 15 are welded to the circuit controller 12. The basic principle of its circuit detection is that the iron core coil 14 senses the magnetic flux change of the three-phase current in the connecting copper bar 13 and transmits it to the Hall device 15 at the notch. Based on the Hall effect principle, the Hall device 15 converts the magnetic flux change amount into a corresponding current signal and outputs it to the circuit controller 12. The circuit controller 12 converts these analog signals into digital signals or performs necessary amplification and filtering processing, and then transmits them as control signals to the motor controller.

[0040] According to some embodiments of the present invention, the current sensing device is plugged into the circuit controller 12, so that the current sensing device can be more firmly connected to the circuit controller 12, reducing loosening or detachment caused by vibration, thermal expansion and contraction, or external force impact, thereby improving the connection stability of the current sensor module 100 and the reliability of long-term operation, and avoiding the connection instability problem of the traditional current sensing device using the form of a fish-eye needle to connect the circuit controller 12 due to external factors.

[0041] According to some embodiments of the present invention, a plurality of sub-copper bars are provided on the connecting copper bar 13, which can increase the conductive area of the connecting copper bar 13, thereby improving the current-carrying capacity of the connecting copper bar 13. A boss 131 is formed on the housing 11, and the boss 131 is provided between two adjacent sub-copper bars. Since discharge phenomena will occur on the insulating surfaces between two adjacent sub-copper bars and the grounded object, it will gradually erode the insulating material provided on the connecting copper bar 13, ultimately resulting in the insulation failure of the connecting copper bar 13. By providing the boss 131 on the housing 11 to increase the distance between two adjacent sub-copper bars, the physical and electrical distances between two adjacent sub-copper bars are increased, eliminating the hidden danger of surface discharge and improving the reliability and safety of the connecting copper bar 13 during operation.

[0042] According to some embodiments of the present invention, a groove is formed at the edge of the housing 11 facing the motor controller; the current sensor module 100 further includes: a seal, and the seal is disposed in the groove to seal the connection between the housing 11 and the motor controller.

[0043] In some specific embodiments, the housing 11 is fixed to the joint of the motor controller and the motor by bolts. An annular groove is formed at the edge of the housing 11 facing the motor controller, and a sealing ring is embedded in the groove, which improves the sealing performance between the housing 11 and the motor controller, completely separates the chambers of the motor controller and the motor, effectively blocks water vapor and other pollutants from entering the interior of the motor controller, reduces the risk of short - circuit of the motor controller caused by environmental factors, and improves the safety and stability of the motor controller during operation.

[0044] The motor drive assembly according to the present invention will be briefly described below.

[0045] The electric drive assembly according to the present invention is provided with the current sensor module 100 in the above - mentioned embodiment. Since the motor drive assembly according to the present invention is provided with the current sensor module 100 in the above - mentioned embodiment, the motor drive assembly according to the present application has higher reliability and stronger safety during operation.

[0046] The vehicle according to the present invention will be briefly described below.

[0047] The vehicle according to the present invention is provided with the motor drive assembly in the above - mentioned embodiment. Since the vehicle according to the present invention is provided with the motor drive assembly in the above - mentioned embodiment, the vehicle according to the present application has higher stability and stronger reliability during driving. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

[0048] In the description of the present invention, the "first feature" and "second feature" may include one or more of such features.

[0049] In the description of the present invention, the meaning of "a plurality" is two or more.

[0050] In the description of the present invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features therebetween.

[0051] In the description of the present utility model, the first feature being "above", "over" or "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature.

[0052] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0053] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A current sensor module, characterized in that: include: Housing (11); A circuit controller (12), the circuit controller (12) being arranged in the housing (11), the circuit controller (12) being formed with a first signal terminal (121) and a second signal terminal (122), the first signal terminal (121) being connected to the motor, and the second signal terminal (122) being connected to the motor controller; A connecting copper busbar (13), wherein the connecting copper busbar (13) is arranged on the housing (11), and the connecting copper busbar (13) is suitable for connecting the motor with the motor controller; a current sensing device, the current sensing device being arranged in the housing (11) and connected to the circuit controller (12), the current sensing device being adapted to detect a current change in the connecting copper busbar (13) and transmitting the current change to the circuit controller (12) to be converted into a current signal; The first signal terminal (121) and the second signal terminal (122) are suitable for transmitting temperature signals, resolver signals and current signals between the circuit controller (12) and the motor controller.

2. The current sensor module according to claim 1, characterized in that: The housing (11), the circuit controller (12), the connecting copper bus (13) and the current sensing device are integrally formed by injection molding.

3. The current sensor module according to claim 1, characterized in that: The circuit controller (12) is provided with the first signal terminal (121) on one side in the thickness direction, and the circuit controller (12) is provided with the second signal terminal (122) on the other side in the thickness direction, and the first signal terminal (121) and the second signal terminal (122) extend in directions away from each other.

4. The current sensor module according to claim 1, characterized in that: The current sensing device comprises: An inductor is disposed around the outer periphery of the connecting copper busbar (13) and is connected to the circuit controller (12). The inductor is suitable for detecting the magnitude of the current in the connecting copper busbar (13) and converting the current into a current signal by the circuit controller (12) and transmitting it to the motor controller.

5. The current sensor module according to claim 4, characterized in that: The sensor comprises: A ferromagnetic coil, the ferromagnetic coil is arranged around the outer periphery of the connecting copper bar (13), and a notch is formed on the ferromagnetic coil; A Hall element (15), the Hall element (15) being arranged on the circuit controller (12), the Hall element (15) extending toward the ferromagnetic coil and being arranged in the gap; The ferromagnetic coil and the Hall chip are suitable for detecting changes in magnetic flux in the connecting copper busbar (13) and converting the changes into current signals by the circuit controller (12) and transmitting them to the motor controller.

6. The current sensor module according to claim 1, characterized in that: The current sensing device is plug-connected to the circuit controller (12).

7. The current sensor module according to claim 1, characterized in that: A plurality of sub-copper bars are arranged on the connecting copper bar (13), a boss (131) is formed on the housing (11), and the boss (131) is arranged between two adjacent sub-copper bars.

8. The current sensor module according to claim 1, characterized in that: A groove is formed at an edge of the housing (11) facing the motor controller; The current sensor module further comprises a sealing member, which is arranged in the groove to seal the connection between the housing (11) and the motor controller.

9. A motor drive assembly, characterized in that: The current sensor module comprises any one of claims 1-8.

10. A vehicle, characterized in that: Includes the motor drive assembly of claim 9.

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