Motor with built-in driver and carrying tool

Abstract

The utility model discloses a motor with a built-in driver and a carrying tool. The motor comprises a driver assembly arranged in a cavity of a motor shell. The driver assembly comprises a first circuit board and a second circuit board which are communicated through a connector; a static part of an angle sensor and a current sensor are arranged on the first circuit board, and the static part of the angle sensor is matched with a moving part of the angle sensor arranged on the rotating shaft and / or the rotor to obtain the rotating angle of the rotating shaft and / or the rotor of the motor; a motor phase line column and a power semiconductor are arranged on the second circuit board, the motor phase line column penetrates through a current sensor to be connected with a phase line of the stator, and the current sensor measures current in the motor phase line; the power semiconductor converts bus voltage into set voltage through switching action and applies the set voltage to phase lines of the stator, so that the stator generates a set magnetic field to drive the rotor to rotate. According to the utility model, layout can be optimized, interference of high-voltage and low-voltage signals is reduced, wire harness length is reduced, and integration level and stability are improved.

Description

TECHNICAL FIELD

[0001] The application relates to an electric machine with a built-in driver and a vehicle, and belongs to the technical field of electric machines. BACKGROUND

[0002] The electric machine mainly comprises a motor stator, a motor rotor and a transmission device; the electric machine driver or controller mainly comprises a measurement unit, a calculation unit and a power conversion unit, which are used for controlling the voltage and current of the stator coil to drive the rotor to rotate. In the field of electric machine design, manufacturing and use, in order to further reduce the system volume and save cost, it has become a trend to integrate the electric machine and the driver together.

[0003] In the existing electric machine with a built-in driver, the layout between low-voltage elements and high-voltage and high-current elements is complex, the wiring is complicated, the occupied space is large, and the signal interference is large. SUMMARY

[0004] The utility model discloses a built-in driver's electric machine and vehicle can optimize the layout between low-voltage element and high-voltage element, reduce the interference of high and low voltage signal, reduce the wire harness length, improve the integration level and stability. In order to achieve the above object, the application is realized by the following technical scheme:

[0005] Firstly, the utility model provides a built-in driver's electric machine, including electric machine casing, with the fixed connection of electric machine casing stator, the rotation of opposite stator rotor, with the fixed connection of rotor shaft, its characterized in that, still including the driver assembly that is located in the cavity of electric machine casing;

[0006] The driver assembly comprises a first circuit board and a second circuit board, and the first circuit board and the second circuit board are fixedly connected to the electric machine casing; the first circuit board and the second circuit board are communicated through a connector to exchange signals and / or power supply;

[0007] The first circuit board is provided with a stationary part of an angle sensor and a current sensor, the stationary part of the angle sensor cooperates with a moving part of the angle sensor arranged on the shaft and / or the rotor, and is used to obtain the rotation angle of the motor shaft and / or the rotor;

[0008] The second circuit board is provided with a motor phase column and a power semiconductor, the motor phase column is connected with the phase line of the stator through the current sensor, and the current sensor is used to measure the current in the motor phase line; the power semiconductor is used to convert the bus voltage into a set voltage applied to the phase line of the stator through switching action to make the stator generate a set magnetic field to drive the rotor to rotate.

[0009] Optionally, the first circuit board is provided with a first connector, and the second circuit board is provided with a second connector, and when the first connector and the second connector are in communication, the first circuit board and the second circuit board exchange signals and / or power.

[0010] Optionally, the first circuit board is provided with a voltage transformer, an input end of the voltage transformer is connected to the first connector, and the voltage transformer is used to reduce the power supplied via the second connector and the first connector to a set voltage value to supply power to the first circuit board.

[0011] Optionally, the moving part of the angle sensor is a radially magnetized permanent magnet, which is used to reflect the rotation angle of the rotating shaft and / or the rotor.

[0012] The stationary part of the angle sensor is a magnetic encoder chip, which is used to collect the rotation angle of the radially magnetized permanent magnet, so as to obtain the rotation angle of the motor rotating shaft and / or the rotor.

[0013] The second circuit board is provided with a power semiconductor driving element and a second power supply, the second power supply is connected to the power semiconductor driving element, and the second power supply is used to supply power to the power semiconductor driving element second circuit board to drive the power semiconductor switch to act.

[0014] Optionally, the first circuit board and the second circuit board are fixed to the end cover of the motor shell.

[0015] Optionally, a heat dissipation layer is arranged between the second circuit board and the end cover of the motor shell, and the heat dissipation layer is used to transfer heat on the second circuit board to the end cover of the motor shell.

[0016] Optionally, the motor shell is provided with a first cavity and a second cavity, the stator and the rotor are arranged in the first cavity, and the driver assembly is arranged in the second cavity.

[0017] Optionally, the motor shell is provided with heat conducting oil, a through hole is arranged on the cavity wall connecting the first cavity and the second cavity, and the heat conducting oil flows through the first cavity and the second cavity through the through hole.

[0018] In a second aspect, the utility model provides a kind of vehicle, including the motor of the built-in driver of the first aspect.

[0019] Compared with the prior art, the motor with built-in driver and vehicle provided by the embodiments of the utility model have the beneficial effects that:

[0020] The driver assembly of the utility model includes a first circuit board and a second circuit board, which are fixed to the motor housing and connected to the first circuit board and the second circuit board via a connector for signal and / or power exchange. The utility model divides the driver into two circuit boards, one of which processes low-voltage and low-current signals, and the other processes high-voltage and high-current signals.

[0021] The utility model provides a first circuit board with a stationary component of an angle sensor and a current sensor. The stationary component of the angle sensor cooperates with the moving component of the angle sensor arranged on the rotating shaft and / or the rotor to obtain the rotation angle of the motor rotating shaft and / or the rotor; the second circuit board provides a motor phase line column and a power semiconductor. The motor phase line column passes through the current sensor and is connected to the phase line of the stator. The current sensor is used to measure the current in the motor phase line; the power semiconductor is used to convert the bus voltage into a set voltage through a switching action and apply it to the phase line of the stator so that the stator generates a set magnetic field to drive the rotor to rotate; the utility model reasonably arranges the topological structure of the angle sensor and the current sensor, optimizes the layout, can reduce the interference of high and low voltage signals, reduce the length of the wiring harness, and improve the integration and stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a motor with a built-in driver provided in Example 1 of the present utility model;

[0023] Figure 2 This is a first exemplary diagram of a first circuit board in a motor with a built-in driver provided in Example 1 of the utility model;

[0024] Figure 3 This is a first exemplary diagram of a second circuit board in a motor with a built-in driver provided in Example 1 of the utility model;

[0025] Figure 4 This is a second exemplary diagram of a first circuit board in a motor with a built-in driver provided in Example 1 of the utility model;

[0026] Figure 5 This is a second example diagram of a second circuit board in a motor with a built-in driver provided in Example 1 of the utility model.

[0027] In the picture:

[0028] 1. Motor housing, 101. Heat dissipation interface, 102. Heat dissipation ribs;

[0029] 2. stator, 201, phase line of stator;

[0030] 3. Rotor;

[0031] 4. Rotating shaft, 401, moving parts of angle sensor;

[0032] 5. First circuit board, 501. Stationary component of angle sensor, 502. Current sensor, 503. First connector, 504. Operation chip, 505. Interface chip, 506. First power supply;

[0033] 6. Second circuit board, 601. Motor phase line column, 602. Power semiconductor, 60201. Power semiconductor drive element, 603. Second connector, 604. Auxiliary circuit element, 605. Cable interface, 606. Energy storage filter capacitor;

[0034] 7. Through hole;

[0035] 8. Heat dissipation layer. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] In the description of this utility model, it should be noted that the terms "upper / lower end," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "set / mounted," "sleeved," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances. Example 1

[0039] like Figure 1As shown, the embodiment provides a motor with built-in driver, which comprises a motor housing 1, a stator 2 fixed to the motor housing, a rotor 3 rotating relative to the stator, a rotating shaft 4 connected to the rotor, and a driver assembly arranged in the cavity of the motor housing.

[0040] The driver assembly comprises a first circuit board 5 and a second circuit board 6, which are fixed to the motor housing. The first circuit board and the second circuit board are connected through a connector for signal and / or power exchange.

[0041] Preferably, the motor housing and the end cover are connected, and the first circuit board and the second circuit board are fixed to the end cover.

[0042] Further preferably, the first circuit board and the second circuit board are fixed to the end cover through bolts.

[0043] In the embodiment, the first circuit board and / or the second circuit board are filled with fixing glue between the first circuit board and / or the second circuit board and the end cover, so as to enhance the waterproof and anti-vibration performance.

[0044] Further, the connector can be a wire connector.

[0045] As shown in Figure 2 and Figure 4 , the first circuit board 5 is provided with a stationary part 501 of an angle sensor, a current sensor 502, a first connector 503, an operation chip 504, an interface chip 505, a first power supply 506, and a voltage converter.

[0046] The stationary part of the angle sensor cooperates with a moving part 401 of the angle sensor arranged on the rotating shaft and / or the rotor, so as to obtain the rotation angle of the rotating shaft and / or the rotor of the motor.

[0047] Specifically, the moving part of the angle sensor is a radially magnetized permanent magnet, which is used to reflect the rotation angle of the rotating shaft and / or the rotor. The stationary part of the angle sensor is a magnetic encoder chip, which is used to collect the rotation angle of the radially magnetized permanent magnet, so as to obtain the rotation angle of the rotating shaft and / or the rotor of the motor.

[0048] Alternatively, the moving part of the angle sensor can also be a permanent magnet, and correspondingly, the stationary part of the angle sensor is a Hall sensor for sensing the polarity of the permanent magnet. Further alternatively, the moving part of the angle sensor and the stationary part of the angle sensor are respectively the rotor and the stator part of a rotary transformer.

[0049] The element reflecting the change of the angle is mounted on the rotating part (the rotating shaft and / or the rotor) of the motor, and the element detecting the change of the angle is mounted on the first circuit board, and then the detected signal is directly transmitted to the operation chip, which can greatly reduce the complexity of the system and improve the anti-interference ability of the signal.

[0050] In this embodiment, the moving component of the angle sensor is disposed on the rotating shaft.

[0051] The interface chip is used for external communication. The outputs of the angle sensor and current sensor are connected to the input of the arithmetic chip, and the input of the power semiconductor driver is connected to the output of the arithmetic chip. The arithmetic chip is used to output the switching action of the power semiconductor based on the rotation angle of the motor shaft and / or rotor and the current in the motor phase line.

[0052] In this embodiment, the computing chip is preferably a single chip microcomputer or a digital signal processor.

[0053] The first power supply is mainly used to supply power to the computing chip, the stationary parts of the angle sensor, the current sensor, the interface chip, etc.

[0054] like Figure 3 and Figure 5 As shown, the second circuit board 6 is provided with a motor phase line column 601, a power semiconductor 602, a power semiconductor driving element 60201, a second connector 603, a second power supply, an auxiliary circuit element 604, a cable interface 605 and an energy storage filter capacitor 606.

[0055] like Figure 2 Current sensor and Figure 3 The position of the motor phase pole setting, such as Figure 4 Current sensor and Figure 5 The motor phase line is located at a position where it passes through a current sensor connected to the stator phase line. The current sensor is used to measure the current in the motor phase line. Preferably, a current sensor is also provided to measure the current flowing through the negative pole of the busbar, thereby detecting excessive motor current and / or calculating the motor input power.

[0056] The high-voltage and high-current motor phase line passes through the current sensor installed on the first circuit board. The current sensor directly transmits the detected signal to the computing chip, which greatly reduces the complexity of the system and improves the signal's anti-interference ability.

[0057] In this embodiment, there are three motor phase wire poles, each connected to a phase of the motor phase wire.

[0058] When the first connector and the second connector are connected, signals and / or power are exchanged between the first and second circuit boards. A voltage converter is provided on the first circuit board, and the input of the voltage converter is connected to the first connector. The voltage converter is used to reduce the power flowing through the second connector and the first connector to a set voltage value, thereby supplying power to the first circuit board.

[0059] Power semiconductors are used to convert the bus voltage into a set voltage through switching action and apply it to the phase line of the stator to generate a set magnetic field to drive the rotor to rotate.

[0060] The second power supply is connected to the power semiconductor driving element and is used to supply power to the power semiconductor driving element.

[0061] The reasons for placing power semiconductors on the second circuit board are: First, power semiconductor driving components generate high-frequency signals. If placed on the first circuit board, they will not only be far away from the power semiconductor to be driven, but will also cause signal interference. Therefore, placing them on the second circuit board is a better choice. Second, the power supply required by power semiconductor driving components is generally 9-12 volts (typical value 12V), and placing them on the second circuit board can provide the required power.

[0062] Energy storage filter capacitors are used to provide large-capacity electrical energy storage and reduce AC ripple to ensure the stability and efficiency of motor control.

[0063] like Figure 1 As shown in FIG, from the perspective of cross section, the energy storage filter capacitor is relatively large and may need to be placed axially through the first circuit board. Figure 2 As shown, the first circuit board is arched, and the bottom notch is penetrated by the energy storage filter capacitor of the second circuit board; Figure 5 As shown, a hole is provided on the first circuit board through which the energy storage filter capacitor passes.

[0064] The high-voltage, high-current motor phase line passes through the current sensor installed on the first circuit board. The current sensor directly transmits the detected signal to the calculation unit, greatly reducing the complexity of the system and improving the signal's anti-interference ability; the energy storage filter capacitor, which is larger in size, passes through the first circuit board in cross section, reducing the system volume.

[0065] In this embodiment, the first circuit board has two power supply modes. The first power supply mode is direct power from the first power source. The second power supply mode is powering the second circuit board, sequentially through the second circuit board, the second connector, the first connector, and the voltage converter. The second power supply mode is preferably used.

[0066] The second circuit board is also provided with an element for detecting the bus voltage. The voltage signal obtained by the detection is transmitted to the first circuit board through the second connector and the first connector, and is input into the operation chip.

[0067] In this embodiment, the auxiliary circuit elements include but are not limited to fuses and circuit breakers as overload and short circuit protection devices, relays and contactors that serve as switches and protectors, circuits for transmitting data, and power-related elements for stabilizing power supply.

[0068] The cable interface connects the power and signal cables. The output end of the power cable connects to a second power source for power supply and to the energy storage filter capacitor for charging. The input end passes through the motor housing and connects to an external power supply. One end of the signal cable connects to the computing chip and / or interface chip, and the other end connects to an external control device for signal transmission.

[0069] Figure 4 The first circuit board and Figure 5 The second combination of the second circuit board, relative to Figure 2 The first circuit board and Figure 3 In the first combination of the second circuit board and the second combination, the motor phase conductors, current sensors, and power semiconductors are arranged circumferentially, which is more conducive to connection with the motor stator.

[0070] This embodiment rationally arranges the topological structures of the angle sensor and the current sensor and optimizes the layout, thereby reducing interference between high and low voltage signals, shortening the wiring harness length, and improving the integration and stability of the system.

[0071] This embodiment provides a variety of settings for heat dissipation.

[0072] Heat dissipation setting 1: Figure 1 As shown, a heat dissipation layer 8 is provided between the second circuit board and the end cover of the motor housing. The heat dissipation layer is used to transfer heat on the second circuit board to the end cover of the motor housing.

[0073] In this embodiment, the heat dissipation layer is a heat dissipation pad or heat dissipation grease.

[0074] Heat dissipation setting 2: Figure 1 As shown, the motor housing is provided with heat dissipation ribs 102. The heat dissipation ribs can enhance the heat dissipation capability, mechanical strength and reliability of the motor and / or driver.

[0075] Heat dissipation setting three: The motor housing is provided with a first cavity and a second cavity, the stator and the rotor are provided in the first cavity, and the driver assembly is provided in the second cavity. The motor housing is provided with heat transfer oil, such as Figure 1 As shown, a through hole is provided on the cavity wall connecting the first cavity and the second cavity, and the heat transfer oil flows through the first cavity and the second cavity at the same time through the through hole 7.

[0076] Furthermore, the thermal oil has electrical insulation properties.

[0077] Cooling setting three includes three cooling modes:

[0078] When the driver power consumption is less than a preset threshold, the thermal oil flows in the first cavity;

[0079] When the driver power consumption is greater than or equal to a preset threshold and less than or equal to a preset critical threshold, the thermal oil flows in the first cavity and the second cavity;

[0080] When the driver power consumption is greater than a preset critical threshold, the heat conducting oil is connected to an external oil pump through the heat dissipation interface 101 on the motor shell, and flows through a special heat sink under the driving of the external oil pump to dissipate heat.

[0081] As shown in Figure 1 To ensure the heat dissipation effect, one or more heat dissipation interfaces are arranged on the cavity wall of the first cavity and the cavity wall of the second cavity.

[0082] It should be noted that the above three heat dissipation settings can be used alone or in combination with two or more to achieve good heat dissipation effect. Embodiment 2

[0083] The embodiment provides a vehicle including the motor with the built-in driver provided in the embodiment 1.

[0084] In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two; The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0085] In the description of the utility model, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; It can be mechanically connected, or it can be electrically connected; It can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0086] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A motor with a built-in driver, comprising a motor housing, a stator fixed to the motor housing, a rotor rotating relative to the stator, and a rotating shaft connected to the rotor, characterized in that: Also included is a driver assembly disposed within the motor housing cavity; The driver assembly includes a first circuit board and a second circuit board, wherein the first circuit board and the second circuit board are fixed to the motor housing; the first circuit board and the second circuit board are connected via a connector to exchange signals and / or power; The first circuit board is provided with a stationary component of an angle sensor and a current sensor. The stationary component of the angle sensor cooperates with a moving component of the angle sensor provided on the rotating shaft and / or the rotor to obtain the rotation angle of the motor rotating shaft and / or the rotor. The second circuit board is provided with a motor phase line column and a power semiconductor. The motor phase line column is connected to the phase line of the stator through a current sensor. The current sensor is used to measure the current in the motor phase line; the power semiconductor is used to convert the bus voltage into a set voltage through a switching action and apply it to the phase line of the stator so that the stator generates a set magnetic field to drive the rotor to rotate.

2. The motor with a built-in driver according to claim 1, characterized in that: The first circuit board is provided with a first connector, and the second circuit board is provided with a second connector. When the first connector and the second connector are connected, signals and / or power are exchanged between the first circuit board and the second circuit board.

3. The motor with a built-in driver according to claim 2, characterized in that: A voltage converter is provided on the first circuit board, an input end of the voltage converter is connected to the first connector, and the voltage converter is used to reduce the power supply via the second connector and the first connector to a set voltage value to supply power to the first circuit board.

4. The motor with a built-in driver according to claim 1, characterized in that: The moving part of the angle sensor is a radially magnetized permanent magnet, which is used to reflect the rotation angle of the shaft and / or rotor; The stationary component of the angle sensor is a magnetic encoder chip, which is used to collect the rotation angle of the radially magnetized permanent magnet, thereby obtaining the rotation angle of the motor shaft and / or rotor.

5. The motor with a built-in driver according to claim 1, characterized in that: A power semiconductor driving element and a second power supply are provided on the second circuit board. The second power supply is connected to the power semiconductor driving element and is used to supply power to the power semiconductor driving element.

6. The motor with a built-in driver according to claim 1, characterized in that: The first circuit board and the second circuit board are fixedly connected to the end cover of the motor housing.

7. The motor with a built-in driver according to claim 6, characterized in that: A heat dissipation layer is provided between the second circuit board and the end cover of the motor housing, and the heat dissipation layer is used to transfer heat on the second circuit board to the end cover of the motor housing.

8. The motor with a built-in driver according to claim 1, characterized in that: A first cavity and a second cavity are provided in the motor housing. The stator and the rotor are provided in the first cavity, and the driver assembly is provided in the second cavity.

9. The motor with a built-in driver according to claim 8, characterized in that: Heat transfer oil is provided in the motor housing, and a through hole is provided on the cavity wall connecting the first cavity and the second cavity. The heat transfer oil flows through the first cavity and the second cavity simultaneously through the through hole.

10. A vehicle, characterized in that: A motor comprising a built-in driver according to any one of claims 1 to 9.

Images