Stator and motor comprising same

Abstract

The present disclosure relates to a stator and a motor having same. The stator according to an embodiment of the present disclosure comprises: a stator core having a plurality of slots formed therein; and a plurality of windings disposed between an inner periphery and an outer periphery of the stator core, wherein, among the plurality of windings, a first winding corresponding to a first phase is disposed across a plurality of layers between the outer periphery and the inner periphery of the stator core, the first winding being disposed in a first number of slots among the plurality of slots, and not disposed in a second number of slots, the second number of slots being fewer than the first number of slots. Accordingly, heat generation during rotation of the motor can be reduced.

Description

Stator and motor equipped with the same

[0001] The present disclosure relates to a stator and a motor equipped with the same, and more specifically, to a stator capable of reducing heat generation during motor rotation and a motor equipped with the same.

[0002] Electric vehicles powered by electricity, or hybrid vehicles combining internal combustion engines, generate their output using motors and batteries.

[0003] Meanwhile, for automotive motors, wire motors or hairpin motors are being developed.

[0004] In particular, when using hairpin motors for heat control, there is a disadvantage that heat generation becomes more severe as you move further into the stator during high-speed rotation.

[0005] The technical problem of the present disclosure is to provide a stator capable of reducing heat generation during motor rotation and a motor equipped with the same.

[0006] Another technical objective of the present disclosure is to provide a stator capable of reducing heat generation by reducing AC (Alternating Current) resistance during motor rotation, and a motor equipped with the same.

[0007] A stator and a motor equipped with the same according to an embodiment of the present disclosure for solving the above technical problem comprises a stator core having a plurality of slots formed therein and a plurality of windings disposed between the inner circumference and the outer circumference of the stator core, wherein a first winding corresponding to a first phase among the plurality of windings is disposed across a plurality of layers between the outer circumference and the inner circumference of the stator core, and the first winding is disposed in a first number of slots among the plurality of slots and is not disposed in a second number of slots which is less than the first number.

[0008] Meanwhile, the first winding has a first parallel part and a second parallel part connected in parallel, the first parallel part is placed in a third number of slots which is half the number of first slots, and the second parallel part is placed in a third number of slots, and the third number may be smaller than half the number of multiple slots.

[0009] Meanwhile, the first winding has a first parallel part and a second parallel part connected in parallel, and a part of the first parallel part is disposed in the n slot of the first layer among a plurality of layers, another part of the first parallel part is disposed in the n+7 slot of the first layer, yet another part of the first parallel part is disposed in the n+3 slot of the second layer adjacent to the first layer, and yet another part of the first parallel part is disposed in the n+7 slot of the third layer adjacent to the second layer.

[0010] Meanwhile, the first winding has a first parallel part and a second parallel part connected in parallel, and a part of the second parallel part is disposed in the n+1 slot of the first layer among a plurality of layers, another part of the second parallel part is disposed in the n+6 slot of the first layer, yet another part of the second parallel part is disposed in the n+2 slot of the second layer adjacent to the first layer, and yet another part of the second parallel part is disposed in the n+6 slot of the third layer adjacent to the second layer.

[0011] Meanwhile, the first winding has a first parallel part and a second parallel part connected in parallel, and a part of the first parallel part is disposed in the n slot of the first layer among a plurality of layers, another part of the first parallel part is disposed in the n+7 slot of the first layer, yet another part of the first parallel part is disposed in the n+3 slot of the second layer adjacent to the first layer, and yet another part of the first parallel part is disposed in the n+6 slot of the third layer adjacent to the second layer.

[0012] Meanwhile, the first winding has a first parallel part and a second parallel part connected in parallel, and a part of the second parallel part is disposed in the n+1 slot of the first layer among a plurality of layers, another part of the second parallel part is disposed in the n+6 slot of the first layer, yet another part of the second parallel part is disposed in the n+2 slot of the second layer adjacent to the first layer, and yet another part of the second parallel part is disposed in the n+7 slot of the third layer adjacent to the second layer.

[0013] Meanwhile, the first winding has a first parallel part and a second parallel part connected in parallel, and a part of the first parallel part may be disposed in the n slot of the first layer among a plurality of layers, a part of the second parallel part may be disposed in the n+1 slot of the first layer, another part of the second parallel part may be disposed in the n+2 slot of the second layer adjacent to the first layer, and another part of the first parallel part may be disposed in the n+3 slot of the second layer.

[0014] Meanwhile, the first parallel part and the second parallel part of the first winding may not be placed in the n+3 slot and the n+4 slot.

[0015] Meanwhile, the first winding may include a hairpin of a first pitch disposed within a layer excluding the layer adjacent to the outer circumference and the layer adjacent to the inner circumference among a plurality of layers.

[0016] Meanwhile, the first winding is placed within a layer adjacent to the outer periphery and may further include a second hairpin with a second pitch larger than the first pitch.

[0017] Meanwhile, the first winding is disposed within a layer adjacent to the inner circumference and may further include a third hairpin of a third pitch larger than the first pitch.

[0018] Meanwhile, the first winding may further include a third hairpin with a third pitch smaller than the second pitch in a layer adjacent to the inner circumference.

[0019] Meanwhile, among the plurality of windings, the second winding corresponding to the second phase is arranged across the plurality of layers, and the second winding is arranged in a first number of slots among the plurality of slots and may not be arranged in a second number of slots.

[0020] Meanwhile, among the plurality of windings, the third winding corresponding to the third phase is arranged across the plurality of layers, and the third winding is arranged in the first number of slots among the plurality of slots and may not be arranged in the second number of slots.

[0021] Meanwhile, in each slot within the plurality of slots, at least one winding among the first phase, the second phase, and the third phase may be disposed.

[0022] Meanwhile, in each slot within the plurality of slots, a winding corresponding to two of the first, second, and third phases is arranged, and a winding corresponding to three phases may not be arranged.

[0023] Meanwhile, the first winding may include hairpins of different pitches within a layer excluding the layer adjacent to the outer circumference and the layer adjacent to the inner circumference among the plurality of layers.

[0024] Meanwhile, the first winding has a first parallel part and a second parallel part connected in parallel, the first parallel part is placed in a first number of slots, and the second parallel part can be placed in a first number of slots.

[0025] Meanwhile, the first parallel part is spaced apart within a plurality of layers, and the second parallel part can be spaced apart within a plurality of layers.

[0026] A stator and a motor equipped with the same according to another embodiment of the present disclosure comprise a stator core having a plurality of slots formed therein and a plurality of windings disposed between the inner circumference and the outer circumference of the stator core, wherein a first winding corresponding to a first phase among the plurality of windings is disposed across a plurality of layers between the outer circumference and the inner circumference of the stator core and is disposed in some of the plurality of slots, and the first winding comprises a hairpin of a first pitch disposed within a layer excluding the layer adjacent to the outer circumference and the layer adjacent to the inner circumference among the plurality of layers, and a second hairpin of a second pitch greater than the first pitch disposed within the layer adjacent to the outer circumference.

[0027] A stator and a motor equipped with the same according to an embodiment of the present disclosure comprise a stator core having a plurality of slots formed therein and a plurality of windings disposed between the inner circumference and the outer circumference of the stator core. A first winding corresponding to a first phase among the plurality of windings is disposed across a plurality of layers between the outer circumference and the inner circumference of the stator core, and the first winding is disposed in a first number of slots among the plurality of slots and is not disposed in a second number of slots that is less than the first number. Accordingly, heat generation during motor rotation can be reduced. In particular, heat generation can be reduced by reducing AC resistance during motor rotation.

[0028] Meanwhile, the first winding comprises a first parallel part and a second parallel part connected in parallel, the first parallel part is placed in a third number of slots which is half the number of the first, and the second parallel part is placed in a third number of slots, and the third number may be smaller than half the number of slots. Accordingly, heat generation during motor rotation can be reduced.

[0029] Meanwhile, the first winding comprises a first parallel part and a second parallel part connected in parallel, wherein a portion of the first parallel part is disposed in the n slot of the first layer among a plurality of layers, another portion of the first parallel part is disposed in the n+7 slot of the first layer, yet another portion of the first parallel part is disposed in the n+3 slot of the second layer adjacent to the first layer, and yet another portion of the first parallel part is disposed in the n+7 slot of the third layer adjacent to the second layer. Accordingly, heat generation during motor rotation can be reduced.

[0030] Meanwhile, the first winding comprises a first parallel part and a second parallel part connected in parallel, and a portion of the second parallel part may be disposed in the n+1 slot of the first layer among a plurality of layers, another portion of the second parallel part may be disposed in the n+6 slot of the first layer, yet another portion of the second parallel part may be disposed in the n+2 slot of the second layer adjacent to the first layer, and yet another portion of the second parallel part may be disposed in the n+6 slot of the third layer adjacent to the second layer. Accordingly, heat generation during motor rotation can be reduced.

[0031] Meanwhile, the first winding comprises a first parallel part and a second parallel part connected in parallel, wherein a portion of the first parallel part is disposed in the n slot of the first layer among a plurality of layers, another portion of the first parallel part is disposed in the n+7 slot of the first layer, yet another portion of the first parallel part is disposed in the n+3 slot of the second layer adjacent to the first layer, and yet another portion of the first parallel part is disposed in the n+6 slot of the third layer adjacent to the second layer. Accordingly, heat generation during motor rotation can be reduced.

[0032] Meanwhile, the first winding comprises a first parallel part and a second parallel part connected in parallel, and a portion of the second parallel part may be disposed in the n+1 slot of the first layer among a plurality of layers, another portion of the second parallel part may be disposed in the n+6 slot of the first layer, yet another portion of the second parallel part may be disposed in the n+2 slot of the second layer adjacent to the first layer, and yet another portion of the second parallel part may be disposed in the n+7 slot of the third layer adjacent to the second layer. Accordingly, heat generation during motor rotation can be reduced.

[0033] Meanwhile, the first winding comprises a first parallel part and a second parallel part connected in parallel, wherein a portion of the first parallel part is disposed in the n slot of the first layer among a plurality of layers, a portion of the second parallel part is disposed in the n+1 slot of the first layer, another portion of the second parallel part is disposed in the n+2 slot of the second layer adjacent to the first layer, and another portion of the first parallel part is disposed in the n+3 slot of the second layer. Accordingly, heat generation during motor rotation can be reduced.

[0034] Meanwhile, the first parallel part and the second parallel part of the first winding may not be placed in the n+3 slot and the n+4 slot. Accordingly, heat generation during motor rotation can be reduced.

[0035] Meanwhile, the first winding may include a hairpin of a first pitch disposed within a layer excluding the layer adjacent to the outer circumference and the layer adjacent to the inner circumference among a plurality of layers. Accordingly, heat generation during motor rotation can be reduced.

[0036] Meanwhile, the first winding is disposed within a layer adjacent to the outer circumference and may further include a second hairpin with a second pitch larger than the first pitch. Accordingly, heat generation during motor rotation can be reduced.

[0037] Meanwhile, the first winding is disposed within a layer adjacent to the inner circumference and may further include a third hairpin with a third pitch larger than the first pitch. Accordingly, heat generation during motor rotation can be reduced.

[0038] Meanwhile, the first winding may further include a third hairpin with a third pitch smaller than the second pitch in a layer adjacent to the inner circumference. Accordingly, heat generation during motor rotation can be reduced.

[0039] Meanwhile, among the plurality of windings, the second winding corresponding to the second phase is arranged across a plurality of layers, and the second winding may be arranged in a first number of slots among a plurality of slots and not arranged in a second number of slots. Accordingly, heat generation during motor rotation can be reduced.

[0040] Meanwhile, among the multiple windings, the third winding corresponding to the third phase is arranged across multiple layers, and the third winding may be arranged in a first number of slots among the multiple slots and not arranged in a second number of slots. Accordingly, heat generation during motor rotation can be reduced.

[0041] Meanwhile, at least one winding among the first phase, the second phase, and the third phase may be disposed in each slot within the plurality of slots. Accordingly, heat generation during motor rotation can be reduced.

[0042] Meanwhile, in each slot within the plurality of slots, a winding corresponding to two of the first, second, and third phases is arranged, and a winding corresponding to three phases may not be arranged. Accordingly, heat generation during motor rotation can be reduced.

[0043] Meanwhile, the first winding may include hairpins of different pitches within the layer excluding the layer adjacent to the outer circumference and the layer adjacent to the inner circumference among the plurality of layers. Accordingly, heat generation during motor rotation can be reduced.

[0044] Meanwhile, the first winding comprises a first parallel part and a second parallel part connected in parallel, the first parallel part may be disposed in a first number of slots, and the second parallel part may be disposed in a first number of slots. Accordingly, heat generation during motor rotation can be reduced.

[0045] Meanwhile, the first parallel part is spaced apart within a plurality of layers, and the second parallel part can be spaced apart within a plurality of layers. Accordingly, heat generation during motor rotation can be reduced.

[0046] A stator and a motor equipped with the same according to another embodiment of the present disclosure comprise a stator core having a plurality of slots formed therein and a plurality of windings disposed between the inner circumference and the outer circumference of the stator core. A first winding corresponding to a first phase among the plurality of windings is disposed across a plurality of layers between the outer circumference and the inner circumference of the stator core and is disposed in some of the plurality of slots. The first winding comprises a hairpin of a first pitch disposed within a layer excluding the layer adjacent to the outer circumference and the layer adjacent to the inner circumference among the plurality of layers, and a second hairpin of a second pitch greater than the first pitch disposed within the layer adjacent to the outer circumference. Accordingly, heat generation during motor rotation can be reduced. In particular, heat generation can be reduced by reducing AC resistance during motor rotation.

[0047] FIG. 1 is a schematic drawing showing a vehicle body according to an embodiment of the present disclosure.

[0048] FIG. 2 is an example of a motor drive system according to an embodiment of the present disclosure.

[0049] FIG. 3 illustrates an example of an internal block diagram of the motor drive unit of FIG. 2.

[0050] Figure 4 is an example of an internal circuit diagram of the motor drive unit of Figure 3.

[0051] FIG. 5 is an example of a perspective view of a motor according to an embodiment of the present disclosure.

[0052] FIGS. 6a to 6e are drawings referenced in the description of FIG. 5.

[0053] FIG. 7a is an example of a stator related to the present disclosure.

[0054] FIG. 7b is an example of a stator according to an embodiment of the present disclosure.

[0055] FIGS. 8a to 9b are drawings referenced in the description of FIG. 7b.

[0056] FIGS. 10a to 10c are examples of windings of a motor related to the present disclosure.

[0057] FIGS. 11a to 11c are examples of winding of a motor according to an embodiment of the present disclosure.

[0058] FIG. 12 is another example of a motor winding related to the present disclosure.

[0059] FIGS. 13a to 13c illustrate various examples of windings arranged within multiple layers.

[0060] FIGS. 14a to 14c are drawings referenced in the description of FIGS. 13a to 13c.

[0061] FIG. 15a is a drawing illustrating an example of winding of a motor according to one embodiment of the present disclosure.

[0062] FIG. 15b is a drawing illustrating an example of winding of a motor according to another embodiment of the present disclosure.

[0063] FIG. 15c is a drawing illustrating an example of winding of a motor according to another embodiment of the present disclosure.

[0064] Fig. 16a is an example of the winding of Fig. 15c.

[0065] Fig. 16b is a drawing referenced in the description of Fig. 16a.

[0066] Figure 17a illustrates various examples of hairpins.

[0067] FIG. 17b illustrates a performance graph of a motor corresponding to the hairpin of FIG. 17.

[0068] The present disclosure will be described in more detail below with reference to the drawings.

[0069] The suffixes "module" and "part" for components used in the following description are assigned solely for the ease of drafting this specification and do not inherently confer any particularly significant meaning or role. Accordingly, the terms "module" and "part" may be used interchangeably.

[0070] FIG. 1 is a schematic drawing showing a vehicle body according to an embodiment of the present disclosure.

[0071] Referring to the drawings, a vehicle (100) according to an embodiment of the present disclosure may include a battery (205) that supplies voltage, a motor drive unit (200) that receives voltage from the battery (205), a motor (250) that is driven and rotated by the motor drive unit (200), a front wheel (150) and a rear wheel (155) that are rotated by the motor (250), a front suspension unit (160) and a rear suspension unit (165) that block vibrations from the road surface from being transmitted to the vehicle body, and an inclination angle detection unit (190) that detects the inclination angle of the vehicle body. Meanwhile, a drive gear (not shown) that converts the rotational speed of the motor (250) based on a gear ratio may be additionally provided.

[0072] The battery (205) supplies voltage to the motor drive unit (200). In particular, it supplies DC voltage to the capacitor (C) within the motor drive unit (200).

[0073] Such a battery (205) may be formed as a set of multiple unit cells. The multiple unit cells may be managed by a Battery Management System (BMS) to maintain a constant voltage and may discharge a constant voltage by the Battery Management System.

[0074] For example, the battery management system may detect the voltage (Vbat) of the battery (205) and transmit it to an electronic control unit (not shown) or an inverter control unit (250) within the motor drive unit (200), and when the battery voltage (Vbat) drops below a lower limit, it may supply the DC voltage stored in the capacitor (C) within the motor drive unit (200) to the battery. Additionally, when the battery voltage (Vbat) rises above an upper limit, it may supply the DC voltage to the capacitor (C) within the motor drive unit (200).

[0075] The battery (205) is preferably composed of a secondary battery capable of charging and discharging, but is not limited thereto.

[0076] The motor drive unit (200) receives a DC voltage from the battery (205) via a voltage input cable (120). The motor drive unit (200) converts the DC voltage received from the battery (205) into an AC voltage and supplies it to the motor (250). The converted AC voltage is preferably a three-phase AC voltage. The motor drive unit (200) supplies a three-phase AC voltage to the motor (250) through a three-phase output cable (125) provided in the motor drive unit (200).

[0077] The motor drive device (200) of FIG. 1 is shown as a three-phase output cable (125) composed of three cables, but three cables can be provided within a single cable.

[0078] Meanwhile, a motor driving device (200) according to an embodiment of the present disclosure will be described later in FIG. 3 and below.

[0079] The motor (250) includes a stator (131) that is fixed and does not rotate, and a rotor (135) that rotates. The motor (250) is equipped with an input cable (140) and receives an alternating voltage supplied from a motor drive device (200). The motor (250) may be, for example, a three-phase motor, and when a voltage-variable / frequency-variable alternating voltage of each phase is applied to the coils of each phase stator, the rotational speed of the rotor is varied based on the applied frequency.

[0080] The motor (250) can be of various forms, such as an induction motor, a BLDC motor (blushless DC motor), or a reluctance motor.

[0081] Meanwhile, a drive gear (not shown) may be provided on one side of the motor (250). The drive gear converts the rotational energy of the motor (250) based on the gear ratio. The rotational energy output from the drive gear is transmitted to the front wheel (150) and / or rear wheel (155) to cause the vehicle (100) to move.

[0082] The front suspension system (160) and the rear suspension system (165) each support the front wheel (150) and the rear wheel (155) with respect to the vehicle body. The vertical direction of the front suspension system (160) and the rear suspension system (165) is supported by springs or damping mechanisms so that vibrations from the road surface do not reach the vehicle body.

[0083] The front wheel (150) may be further equipped with a steering device (not shown). The steering device is a device that controls the direction of the front wheel (150) to drive the vehicle (100) in the direction intended by the driver.

[0084] Meanwhile, although not shown in the drawing, the vehicle (100) may further include an electronic controller for controlling electronic devices throughout the vehicle. The electronic controller (not shown) controls each device to operate, display, etc. Additionally, it may control the battery management system described above.

[0085] Additionally, the control unit (170 in FIG. 2) can generate driving command values ​​according to various driving modes (driving mode, reverse mode, neutral mode, and parking mode, etc.) based on detection signals from an inclination angle detection unit (not shown) that detects the inclination angle of the vehicle (100), a speed detection unit (not shown) that detects the speed of the vehicle (100), a brake detection unit (not shown) according to the operation of the brake pedal, and an accelerator detection unit (not shown) according to the operation of the accelerator pedal. At this time, the driving command values ​​may be, for example, torque command values ​​or torque command values.

[0086] Meanwhile, the vehicle (100) according to the embodiment of the present disclosure may be a concept that includes a pure electric vehicle using a battery and a motor, as well as a hybrid electric vehicle using a battery and a motor while using an engine.

[0087] At this time, the hybrid electric vehicle may further be equipped with a switching means capable of selecting at least one of a battery and an engine, and a transmission.

[0088] Meanwhile, hybrid electric vehicles can be classified into a series type, which converts mechanical energy output from an engine into electrical energy to drive a motor; a parallel type, which simultaneously utilizes mechanical energy output from an engine and electrical energy from a battery; and a series-parallel type, which combines these.

[0089] FIG. 2 is an example of a motor drive system according to an embodiment of the present disclosure.

[0090] Referring to the drawings, a motor drive system according to one embodiment of the present disclosure may include a vehicle (100) and a server (500).

[0091] Here, the server (500) may be a server operated by the manufacturer of the motor drive unit (200) or the vehicle (100), or may correspond to a mobile terminal of the driver of the motor drive unit (200) or the vehicle (100).

[0092] Meanwhile, the vehicle (100) may be equipped with an input unit (120), a communication unit (130), a memory (140), a control unit (170), and a motor drive unit (200).

[0093] The input unit (120) is equipped with an operation button, a key, etc., and can output an input signal for voltage on / off, operation setting, etc. of the vehicle (100).

[0094] The communication unit (130) can exchange data with a peripheral device, for example, a server (500), via wired or wireless means, or exchange data wirelessly with a server at a remote location, etc. For example, it can perform mobile communication such as 4G or 5G, infrared (IR) communication, RF communication, Bluetooth communication, Zigbee communication, WiFi communication, etc.

[0095] Meanwhile, the memory (140) of the vehicle (100) can store data necessary for the operation of the vehicle (100). For example, it can store data regarding the operation time, operation mode, etc., when the motor drive unit (200) is operated.

[0096] Additionally, the memory (140) of the vehicle (100) can store management data including power consumption information, recommended driving information, current driving information, and management information of the vehicle.

[0097] Additionally, the memory (140) of the vehicle (100) can store diagnostic data including operation information, driving information, and error information of the vehicle.

[0098] The control unit (170) can control each unit within the vehicle (100). For example, the control unit (170) can control the input unit (120), the communication unit (130), the memory (140), the motor drive unit (200), etc.

[0099] The motor drive unit (200) may be named a motor drive unit as a drive unit for driving the motor (250).

[0100] Meanwhile, the motor driving device (200) comprises a plurality of inverter switching elements, an inverter (420) that outputs an AC voltage to the motor (250), an output current detection unit (E) that detects an output current (io) flowing through the motor (250), and current information (id, iq) and a torque command value (T) based on the output current (io) detected by the output current detection unit (E). * Based on ), it may include an inverter control unit (430) that outputs a switching control signal to the inverter (420).

[0101] Meanwhile, current information (id,iq) based on the output current (io) and torque command value (T * ) can be transmitted to an external server (500), and a current command value (i) from the server (500) * d,i * q) may also be received. And, based on the current command value received from the communication unit (130), the inverter control unit (430) may output a switching control signal to the inverter (420).

[0102] Accordingly, the motor (250) can be driven based on the current command value corresponding to the maximum torque calculated in real time by the server (500). Thus, maximum torque driving of the motor (250) becomes possible.

[0103] Meanwhile, the communication unit (130) within the motor drive unit (200) has current information (id, iq) and torque command value (T *Voltage information regarding the ), and the detected DC voltage (Vdc) can be transmitted to the server (500). Accordingly, maximum torque driving of the motor (250) under various conditions becomes possible.

[0104] Meanwhile, the detailed operation of the motor drive device (200) is described with reference to FIG. 3.

[0105] FIG. 3 illustrates an example of an internal block diagram of the motor drive unit of FIG. 2.

[0106] Referring to the drawings, a motor driving device (200) according to an embodiment of the present disclosure may include a driving device for driving a motor (250), an inverter (420) that outputs an AC voltage to the motor (250) and has a plurality of inverter switching elements (Sa~Sc, S'a~S'c), and an inverter control unit (430) that controls the inverter (420). Additionally, it may include a memory (270) that provides various stored data to the inverter control unit (430).

[0107] Meanwhile, the motor driving device (200) according to the embodiment of the present disclosure may further include a capacitor (C) that stores the DC terminal voltage (Vdc) of the input terminal of the inverter (420), a DC terminal voltage detection unit (B) that detects the DC terminal voltage (Vdc), an output current detection unit (E) that detects the output current flowing through the motor (250), and a position detection sensor (105).

[0108] According to an embodiment of the present disclosure, the motor (250) may be a three-phase motor driven by an inverter (420).

[0109] Meanwhile, the inverter control unit (430) has a current command value (i) corresponding to the calculated maximum torque. * d,i * Based on q), a switching control signal (Sic) can be output to the inverter (420). Thus, maximum torque driving of the motor (250) becomes possible.

[0110] An inverter control unit (430) according to an embodiment of the present disclosure receives current information (id, iq) and torque command value (T) in real time. * Calculate ) and the torque command value (T * Based on ), current command value (i * d,i * Calculate q), and the current command value (i * d,i * The motor (250) is driven using q). Accordingly, the accuracy for high-efficiency driving is improved.

[0111] Meanwhile, the motor drive device (200) may further include a capacitor (C) that stores the DC voltage (Vdc) of the input terminal of the inverter (420) and a DC voltage detection unit (B) that detects the DC voltage (Vdc).

[0112] The inverter control unit (430) includes current information (id, iq) and torque command value (T * Based on ), and the detected dc terminal voltage (Vdc), the current command value (i * d,i * Calculate q), and the current command value (i * d,i * The motor (250) is driven using q). Accordingly, the accuracy for high-efficiency driving is improved.

[0113] Figure 4 is an example of an internal circuit diagram of the motor drive unit of Figure 3.

[0114] Referring to the drawings, the motor driving device (200) according to an embodiment of the present disclosure may include an inverter (420), an inverter control unit (430), an output current detection unit (E), a DC voltage detection unit (Vdc), and a position detection sensor (105).

[0115] Meanwhile, the motor drive device (200) can be named a power conversion device because it converts power to drive the motor.

[0116] The DC-terminal capacitor (C) stores the voltage input to the DC-terminal (ab-terminal). In the drawing, a single component is exemplified as the DC-terminal capacitor (C), but multiple components may be provided to ensure component stability.

[0117] Meanwhile, the input voltage supplied to the DC-side capacitor (C) may be the voltage stored in the battery (205) or the voltage level-converted by a converter (not shown).

[0118] Meanwhile, since DC voltage is stored across the two ends of the DC terminal capacitor (C), it may also be named the DC terminal or DC link terminal.

[0119] The DC terminal voltage detection unit (B) can detect the DC terminal voltage (Vdc) across the DC terminal capacitor (C). To this end, the DC terminal voltage detection unit (B) may include a resistor element, an amplifier, etc. The detected DC terminal voltage (Vdc) can be input to the inverter control unit (430) as a discrete signal in the form of a pulse.

[0120] The inverter (420) is equipped with a plurality of inverter switching elements (Sa~Sc, S'a~S'c) and can convert a DC voltage (Vdc) into a three-phase AC voltage (Va, Vb, Vc) of a predetermined frequency by the on / off operation of the switching elements (Sa~Sc, S'a~S'c) and output it to a three-phase synchronous motor (250).

[0121] The inverter (420) has a pair of upper arm switching elements (Sa, Sb, Sc) and lower arm switching elements (S'a, S'b, S'c) each connected in series with one another, and a total of three pairs of upper and lower arm switching elements are connected in parallel (Sa&S'a, Sb&S'b, Sc&S'c). A diode is connected in antiparallel to each switching element (Sa, S'a, Sb, S'b, Sc, S'c).

[0122] The switching elements within the inverter (420) perform on / off operations based on the inverter switching control signal (Sic) from the inverter control unit (430). As a result, a three-phase AC voltage having a predetermined frequency is output to the three-phase synchronous motor (250).

[0123] The inverter control unit (430) can control the switching operation of the inverter (420) based on a sensorless method.

[0124] To this end, the inverter control unit (430) can receive the output current (io) detected by the output current detection unit (E).

[0125] The inverter control unit (430) can output an inverter switching control signal (Sic) to each gate terminal of the inverter (420) to control the switching operation of the inverter (420). Accordingly, the inverter switching control signal (Sic) may also be referred to as a gate driving signal.

[0126] Meanwhile, the inverter switching control signal (Sic) is a switching control signal of the pulse width modulation (PWM) method, and is generated and output based on the output current (io) detected by the output current detection unit (E).

[0127] The output current detection unit (E) detects the output current (io) flowing between the inverter (420) and the three-phase motor (250). That is, it can detect the current flowing through the motor (250).

[0128] The output current detection unit (E) can detect all output currents of each phase (ia, ib, ic), or it can detect the output currents of two phases using three-phase balance.

[0129] The output current detection unit (E) can be located between the inverter (420) and the motor (250), and for current detection, a CT (current transformer), a shunt resistor, etc. may be used.

[0130] The detected output current (io) can be applied to the inverter control unit (430) as a discrete signal in the form of a pulse, and a switching control signal (Sic) is generated based on the detected output current (io).

[0131] The position detection sensor (105) can sense rotor position information (θ) of the motor (250). The sensed position information (θ) can be input to the inverter control unit (430).

[0132] Meanwhile, the three-phase motor (250) is equipped with a stator and a rotor, and an alternating current voltage of a predetermined frequency is applied to the coils of the stator of each phase (phases a, b, and c) so that the rotor rotates.

[0133] These motors (250) may include, for example, a surface-mounted permanent-magnet synchronous motor (SMPMSM), an interior permanent magnet synchronous motor (IPMSM), and a synchronous reluctance motor (Synrm). Among these, SMPMSM and IPMSM are synchronous motors (Permanent Magnet Synchronous Motor; PMSM) that use permanent magnets, and Synrm is characterized by not having permanent magnets.

[0134] FIG. 5 is an example of a perspective view of a motor according to an embodiment of the present disclosure.

[0135] Referring to the drawings, a motor (250) according to an embodiment of the present disclosure includes a housing (310), a stator (400) located inside the housing (310), and a rotor (300) disposed in a hollow within the stator (400) and rotating.

[0136] Meanwhile, the rotor (300) may include a surface-attached permanent magnet or an embedded permanent magnet, etc.

[0137] Meanwhile, the motor (250) according to an embodiment of the present disclosure includes a hairpin motor having a plurality of hairpins.

[0138] FIGS. 6a to 6e are drawings referenced in the description of FIG. 5.

[0139] FIG. 6a is an example of a perspective view of a stator according to an embodiment of the present disclosure.

[0140] Referring to the drawings, a stator (400) according to an embodiment of the present disclosure includes a stator core (CRE) having a plurality of slots formed therein and a plurality of windings (APW, BPW, CPW) disposed between the inner circumference and the outer circumference of the stator core (CRE).

[0141] Meanwhile, a plurality of windings (APW, BPW, CPW) may include a first winding (APW) corresponding to a first phase (u phase), a second winding (BPW) corresponding to a second phase (v phase), and a third winding (CPW) corresponding to a third phase (w phase).

[0142] Meanwhile, multiple windings (APW, BPW, CPW) may each be equipped with multiple hairpins.

[0143] Meanwhile, the stator (400) according to an embodiment of the present disclosure may further include an insulator for insulating between the stator core (CRE) and the winding (APW, BPW, CPW) or the hairpin within the winding (APW, BPW, CPW). Furthermore, the coating of the hairpin within the winding (APW, BPW, CPW) may be protected.

[0144] FIG. 6b is an example of a side view of the stator of FIG. 6a, and FIG. 6c is a top view of the stator of FIG. 6a.

[0145] Referring to the drawing, a plurality of windings (APW, BPW, CPW) are arranged in an internal slot of a stator core (CRE), some of the plurality of windings (APW, BPW, CPW) protrude to the upper outer side (UPW) of the stator core (CRE), and other parts of the plurality of windings (APW, BPW, CPW) may protrude to the lower outer side (LPW) of the stator core (CRE).

[0146] Meanwhile, the stator (400) according to the embodiment of the present disclosure may further include a connection ring (CNR) for supplying external power to the windings (APW, BPW, CPW).

[0147] For example, each phase terminal of the inverter (420) of FIG. 4 can be connected to the connection ring (CNR).

[0148] Meanwhile, the connection ring (CNR) can be placed on the upper outer side (UPW) of the stator core (CRE).

[0149] To this end, it is preferable that the height of the upper outer (UPW) of the stator core (CRE) be greater than the height of the lower outer (LPW) of the stator core (CRE).

[0150] Fig. 6d is a partial enlarged view of the upper part of the stator in Fig. 6a.

[0151] Referring to the drawing, some of the multiple windings (APW, BPW, CPW) may protrude to the upper outer side (UPW) of the stator core (CRE).

[0152] For example, among the plurality of windings (APW, BPW, CPW), the first winding (APW) corresponding to the first phase (u phase) may include a plurality of hairpins (HP1~HP6).

[0153] FIG. 6e illustrates a front view of a plurality of hairpins (HP1 to HP6) of FIG. 6d.

[0154] Referring to the drawing, the first hairpin (HP1) has a second pitch (D2) that is larger than the first pitch (D1) and can be placed in a layer adjacent to the outer circumference (ORA) of the stator core (CRE).

[0155] The second hairpin (HP2) has a third pitch (D3) smaller than the second pitch (D2) and can be placed in a layer adjacent to the outer circumference (ORA) of the stator core (CRE). In this case, it is preferable that the third pitch (D3) is larger than the first pitch (D1).

[0156] The third hairpin (HP3) has a second pitch (D2) and can be placed in a layer adjacent to the inner circumference (IRA) of the stator core (CRE).

[0157] The fourth hairpin (HP4) has a third pitch (D3) that is smaller than the second pitch (D2) and can be placed in a layer adjacent to the inner circumference (IRA) of the stator core (CRE).

[0158] The fifth hairpin (HP5) has a first pitch (D1) and can be positioned between the inner circumference (IRA) and the outer circumference (ORA) of the stator core (CRE). In particular, the fifth hairpin (HP5) can be positioned within a layer excluding the layer adjacent to the outer circumference and the layer adjacent to the inner circumference among a plurality of layers.

[0159] The sixth hairpin (HP6) has a first pitch (D1) and can be positioned between the inner circumference (IRA) and the outer circumference (ORA) of the stator core (CRE). In particular, the sixth hairpin (HP6) can be positioned within a layer excluding the layer adjacent to the outer circumference and the layer adjacent to the inner circumference among a plurality of layers.

[0160] In particular, the 6th hairpin (HP6) can be positioned closer to the inner circumference (IRA) than the 5th hairpin (HP5).

[0161] Meanwhile, the twisting directions of both ends of the first to fourth hairpins (HP1~HP4) are the same, and the twisting directions of both ends of the fifth to sixth hairpins (HP5~HP6) may be different from each other.

[0162] In particular, the twisting of both ends of the 5th and 6th hairpins (HP5~HP6) may be in a shape that converges toward the center.

[0163] FIG. 7a is an example of a stator related to the present disclosure.

[0164] Referring to the drawings, the stator (400x) related to the present disclosure includes a stator core (CRE) having a plurality of slots formed therein and a plurality of windings (APW, BPW, CPW) disposed between the inner circumference and the outer circumference of the stator core (CRE).

[0165] Meanwhile, a plurality of windings (APW, BPW, CPW) are arranged in an internal slot of the stator core (CRE), some of the plurality of windings (APW, BPW, CPW) protrude to the upper outer side (UPWx) of the stator core (CRE), and other parts of the plurality of windings (APW, BPW, CPW) may protrude to the lower outer side (LPWx) of the stator core (CRE).

[0166] At this time, the height of the stator core (CRE) is Hb, the height of the upper outer side (UPWx) of the stator core (CRE) is Hx, and the height of the lower outer side (LPWx) of the stator core (CRE) may be Hy, which is smaller than Hx.

[0167] FIG. 7b is an example of a stator according to an embodiment of the present disclosure.

[0168] Referring to the drawings, a stator (400) according to an embodiment of the present disclosure includes a stator core (CRE) having a plurality of slots formed therein and a plurality of windings (APW, BPW, CPW) disposed between the inner circumference and the outer circumference of the stator core (CRE).

[0169] Meanwhile, a plurality of windings (APW, BPW, CPW) are arranged in an internal slot of the stator core (CRE), some of the plurality of windings (APW, BPW, CPW) protrude to the upper outer side (UPW) of the stator core (CRE), and other parts of the plurality of windings (APW, BPW, CPW) may protrude to the lower outer side (LPW) of the stator core (CRE).

[0170] At this time, the height of the stator core (CRE) is Ho, the height of the upper outer (UPW) of the stator core (CRE) is Ha, which is smaller than Hx, and the height of the lower outer (LPW) of the stator core (CRE) may be Hb, which is smaller than Ha. At this time, it is preferable that Hb is smaller than Hy in FIG. 7a.

[0171] Meanwhile, the upper outer (UPW) of the stator core (CRE) can be named the upper end turn area, and the lower outer (LPW) of the stator core (CRE) can be named the lower end turn area.

[0172] Compared to the stator (400x) of FIG. 7a, the stator (400) of FIG. 7b is equipped with a first pitch hairpin that is smaller than the pitch of the hairpin of FIG. 7a, thereby reducing the size of the upper and lower end-turn regions, reducing the weight of the coil, further reducing the inter-line resistance, and ultimately reducing the copper loss.

[0173] Ultimately, according to the stator (400) of FIG. 7b, heat generation during motor rotation can be reduced. In particular, by reducing AC resistance during motor rotation, heat generation can be reduced.

[0174] FIGS. 8a to 9b are drawings referenced in the description of FIG. 7b.

[0175] FIG. 8a illustrates the arrangement of the first to fourth hairpins among a plurality of hairpins.

[0176] Referring to the drawing, the first to fourth hairpins (HP1 to HP4) among the plurality of hairpins (HP1 to HP6) of FIG. 6e can be arranged sequentially.

[0177] In the drawing, the first hairpin (HP1), second hairpin (HP2), third hairpin (HP3), and fourth hairpin (HP4) are exemplified as being arranged in order from right to left.

[0178] Meanwhile, to reduce end turn, it is preferable that some points (SBD) of the first to fourth hairpins (HP1~HP4) are each bent.

[0179] Meanwhile, it is preferable that some points (CTT) of the first to fourth hairpins (HP1~HP4) be welded.

[0180] That is, the points (CTT) of the twisting portions of the first to fourth hairpins (HP1~HP4) can be welded and connected to each other.

[0181] Meanwhile, in the drawing, the bending point (SBD) is shown as being on the upper side and the welding point (CTT) as being on the lower side, but is not limited thereto.

[0182] For example, based on FIGS. 6b and 6d, the point (CTT) of the twisting portion of the first to fourth hairpins (HP1 to HP4) may be positioned on the upper outer side (UPW) of the stator core (CRE), and the bending point (SBD) may be positioned on the lower outer side (LPW) of the stator core (CRE).

[0183] FIG. 8b is a drawing showing a plurality of hairpins placed in the internal slots of a stator core (CRE).

[0184] Referring to the drawing, the hairpin structure (720) has a plurality of hairpins disposed in the internal slots of the stator core (CRE).

[0185] Meanwhile, in one area (Arm) of the upper outer side (UPW) of the stator core (CRE), at least some of the plurality of hairpins (HP1 to HP6) are twisted and welded, and in one area (Arn) of the lower outer side (LPW) of the stator core (CRE), at least some of the plurality of hairpins (HP1 to HP6) are bent.

[0186] Accordingly, by taking into account interference between adjacent coils, the size of the end-turn area can be reduced, and furthermore, inter-line resistance and copper loss can be reduced.

[0187] Ultimately, according to the hairpin structure (720) of FIG. 8b, heat generation during motor rotation can be reduced. In particular, by reducing AC resistance during motor rotation, heat generation can be reduced.

[0188] FIG. 9a is a diagram illustrating multiple layers within an internal slot of a stator core (CRE).

[0189] Referring to the drawings, a plurality of slots (S1 to S48) are formed inside the stator core (CRE) according to an embodiment of the present disclosure.

[0190] In the drawing, 48 multiple slots (S1 to S48) are formed inside the stator core (CRE), but various variations are possible.

[0191] Meanwhile, multiple layers (LY1~LY6) in which windings are arranged can be formed inside each slot (S1~S8).

[0192] For example, a first layer (LY1), a second layer (LY2), a third layer (LY3), a fourth layer (LY4), a fifth layer (LY5), and a sixth layer (LY6) can be formed sequentially from the outer circumference (ORA) of the stator core (CRE) toward the inner circumference (IRA).

[0193] In the drawing, the first part (WR1) of the first winding (APW) is placed in the first layer (LY1), third layer (LY3), and fifth layer (LY5) of the first slot (S1), and the second part (WR2) of the first winding (APW) is placed in the second layer (LY2), fourth layer (LY4), and sixth layer (LY6) of the first slot (S1).

[0194] Meanwhile, the first part (WR1) and the second part (WR2) of the first winding (APW) can be connected in parallel.

[0195] In the drawing, the third part (WR3) of the first winding (APW) is placed in the first layer (LY1), third layer (LY3), and fifth layer (LY5) of the second slot (S2) and the third slot (S3), and the first part (WR1) of the first winding (APW) is placed in the second layer (LY2), fourth layer (LY4), and sixth layer (LY6) of the second slot (S2) and the third slot (S3).

[0196] Meanwhile, the third part (WR3) and the first part (WR1) of the first winding (APW) can be connected in parallel.

[0197] In the drawing, the second part (WR2) of the first winding (APW) is placed in the first layer (LY1), third layer (LY3), and fifth layer (LY5) of the fourth slot (S4) and fifth slot (S5), and the third part (WR3) of the first winding (APW) is placed in the second layer (LY2), fourth layer (LY4), and sixth layer (LY6) of the fourth slot (S4) and fifth slot (S5).

[0198] Meanwhile, the second part (WR2) and the third part (WR3) of the first winding (APW) can be connected in parallel.

[0199] In this way, since multiple winding parts are arranged in a double-layer winding form in one slot, vibration or noise of the motor can be reduced.

[0200] Meanwhile, the spacing between adjacent slots can be referred to as the pitch (PTH). In the drawing, the spacing between the 6th slot (S6) and the 7th slot (S7) is shown as the pitch (PTH).

[0201] FIG. 9b illustrates an example of winding according to an embodiment of the present disclosure.

[0202] Referring to the drawing, among the plurality of windings (APW, BPW, CPW), the first winding (APW) corresponding to the first phase has a first parallel part (PWa) and a second parallel part (PWb) connected in parallel.

[0203] For example, a first parallel part (PWa) of a first winding (APW) may be disposed in a part of a plurality of layers (LY1~LY6) formed inside each slot (S1~S8), and a second parallel part (PWb) may be disposed in another part of the plurality of layers (LY1~LY6).

[0204] In this way, by configuring the first winding (APW) with the first parallel part (PWa) and the second parallel part (PWb), the resistance between lines can be reduced, and consequently, the copper loss can be reduced. Consequently, heat generation during motor rotation can be reduced, and in particular, by reducing the AC resistance during motor rotation, heat generation can be reduced.

[0205] FIGS. 10a to 10c are examples of windings of a motor related to the present disclosure.

[0206] FIG. 10a illustrates a parallel pattern (900x) of a 5-pitch based hairpin.

[0207] Referring to the drawings, the parallel pattern (900x) within the winding of the motor related to the present disclosure comprises a 5-pitch based hairpin (HPy).

[0208] In particular, the parallel pattern (900x) within the winding of the motor related to the present disclosure has a 5-pitch based hairpin (HPy) in the layers (LY2~LY5), excluding the layer (LY1) adjacent to the outer circumference (ORA) and the layer (LY6) adjacent to the inner circumference (IRA) among the plurality of layers.

[0209] Accordingly, the spacing within the hairpin (HPy) can be 5 pitches corresponding to 5 slots as Dx.

[0210] FIG. 10b illustrates a first parallel part and a second parallel part of a first winding including a 5-pitch based hairpin (HPy) of FIG. 10a.

[0211] Referring to the drawings, (a) of FIG. 10b illustrates a first parallel part of a first winding including a 5-pitch based hairpin (HPy).

[0212] The first parallel part of the first winding starts at point 1 of the first layer (LY1) in the 48 slots (S48), passes through point 2 of the first layer (LY1) in the 7 slots (S7), point 3 of the second layer (LY2) in the 2 slots (S2), point 4 of the third layer (LY3) in the 7 slots (S7), point 5 of the fourth layer (LY4) in the 2 slots (S2), point 6 of the fifth layer (LY5) in the 7 slots (S7), point 7 of the sixth layer (LY6) in the 2 slots (S2), point 8 of the sixth layer (LY6) in the 7 slots (S7), and so on, and passes through point 47 of the third layer (LY3) in the 48 slots (S48) and point 48 of the second layer (LY2) in the 43 slots (S43).

[0213] Accordingly, the first parallel part of the first winding is placed in all six layers (LY1~LY6) within slots 7, 19, 31, and 43.

[0214] Meanwhile, the first parallel part of the first winding is placed in three layers (LY1, LY3, LY5) within 12 slots, 24 slots, 36 slots, and 48 slots, and the first parallel part of the first winding is placed in three layers (LY2, LY4, LY6) within 2 slots, 14 slots, 26 slots, and 38 slots.

[0215] Meanwhile, the first parallel part of the first winding may further include a 7-pitch based hairpin for connecting point 1 and point 2 within the first layer (LY1) adjacent to the outer circumference (ORA) among the plurality of layers (LY1~LY6).

[0216] Meanwhile, the first parallel part of the first winding may further include a 5-pitch based hairpin for connecting points 7 and 8 within the 6th layer (LY6) adjacent to the inner circumference (IRA) among the plurality of layers (LY1~LY6).

[0217] Figure 10b (b) illustrates a second parallel part of a first winding including a 5-pitch based hairpin (HPy).

[0218] The second parallel part of the first winding starts at point 1 of the first layer (LY1) in 1 slot (S1), passes through point 2 of the first layer (LY1) in 6 slots (S6), point 3 of the second layer (LY2) in 1 slot (S1), point 4 of the third layer (LY3) in 6 slots (S6), point 5 of the fourth layer (LY4) in 1 slot (S1), point 6 of the fifth layer (LY5) in 6 slots (S6), point 7 of the sixth layer (LY6) in 1 slot (S1), point 8 of the sixth layer (LY6) in 8 slots (S8), and so on, and passes through point 47 of the third layer (LY3) in 1 slot (S1) and point 48 of the second layer (LY2) in 44 slots (S44).

[0219] Accordingly, the second parallel part of the first winding is placed in all six layers (LY1~LY6) within slot 1, slot 13, slot 25, and slot 37.

[0220] Meanwhile, the second parallel part of the first winding is placed in three layers (LY1, LY3, LY5) within slots 6, 18, 30, and 42, and the second parallel part of the first winding is placed in three layers (LY2, LY4, LY6) within slots 8, 20, 32, and 44.

[0221] Meanwhile, the second parallel part of the first winding may further include a 5-pitch based hairpin for connecting one point and two points within the first layer (LY1) adjacent to the outer circumference (ORA) among the plurality of layers (LY1~LY6).

[0222] Meanwhile, the second parallel part of the first winding may further include a 7-pitch based hairpin for connecting points 7 and 8 within the 6th layer (LY6) adjacent to the inner circumference (IRA) among the plurality of layers (LY1~LY6).

[0223] FIG. 10c illustrates the arrangement of first to third windings (APW~CPW) including a 5-pitch based hairpin (HPy) of FIG. 10a.

[0224] Referring to the drawings, FIG. 10c (a) illustrates a first parallel part (PWa) of a first winding (APW) and a second parallel part (PWb) of a first winding (APW).

[0225] Meanwhile, the first parallel part (PWa) of the first winding (APW) is placed in all six layers (LY1~LY6) within slots 7, 19, 31, and 43, the first parallel part (PWa) of the first winding (APW) is placed in three layers (LY1, LY3, LY5) within slots 12, 24, 36, and 48, and the first parallel part (PWa) of the first winding (APW) is placed in three layers (LY2, LY4, LY6) within slots 2, 14, 26, and 38.

[0226] Meanwhile, the second parallel part (PWb) of the first winding (APW) is placed in all six layers (LY1~LY6) within slot 1, slot 13, slot 25, and slot 37, the second parallel part (PWb) of the first winding (APW) is placed in three layers (LY1,LY3,LY5) within slot 6, slot 18, slot 30, and slot 42, and the second parallel part (PWb) of the first winding (APW) is placed in three layers (LY2,LY4,LY6) within slot 8, slot 20, slot 32, and slot 44.

[0227] That is, the first winding (APW) is placed in slots 1, 2, 6~8, 12~14, 18~20, 24~26, 30~32, 36~38, 42~44, and 48 out of 48 slots, and is not placed in slots 3~5, 9~11, 15~17, 21~23, 27~29, 33~35, 39~41, and 45~47.

[0228] Ultimately, the first winding (APW) is placed in 24 of the 48 slots and not in the 24 slots.

[0229] Figure 10c (b) illustrates a first parallel part (PWa) of a second winding (BPW) and a second parallel part (PWb) of a first winding (APW).

[0230] Referring to the drawing, Fig. 10c (b) illustrates a first parallel part (PWa) of a second winding (BPW) and a second parallel part (PWb) of a first winding (APW).

[0231] Meanwhile, the first parallel part (PWa) of the second winding (BPW) is placed in all six layers (LY1~LY6) within slots 3, 15, 27, and 39, the first parallel part (PWa) of the second winding (BPW) is placed in three layers (LY1, LY3, LY5) within slots 8, 20, 32, and 44, and the second parallel part (PWb) of the second winding (BPW) is placed in three layers (LY2, LY4, LY6) within slots 10, 22, 34, and 46.

[0232] Meanwhile, the second parallel part (PWb) of the second winding (BPW) is placed in all six layers (LY1~LY6) within slots 9, 21, 33, and 45, the second parallel part (PWb) of the second winding (BPW) is placed in three layers (LY1, LY3, LY5) within slots 2, 14, 26, and 38, and the second parallel part (PWb) of the second winding (BPW) is placed in three layers (LY2, LY4, LY6) within slots 4, 16, 28, and 40.

[0233] Ultimately, the second winding (BPW) is placed in 24 of the 48 slots and not in the 24 slots.

[0234] Figure 10c (c) illustrates a first parallel part (PWa) of a third winding (CPW) and a second parallel part (PWb) of a first winding (APW).

[0235] Referring to the drawing, (c) of FIG. 10c illustrates a first parallel part (PWa) of a third winding (CPW) and a second parallel part (PWb) of a first winding (APW).

[0236] Meanwhile, the first parallel part (PWa) of the third winding (CPW) is placed in all six layers (LY1~LY6) within slots 11, 23, 35, and 47, the first parallel part (PWa) of the third winding (CPW) is placed in three layers (LY1, LY3, LY5) within slots 4, 16, 28, and 40, and the first parallel part (PWa) of the third winding (CPW) is placed in three layers (LY2, LY4, LY6) within slots 6, 18, 30, and 42.

[0237] Meanwhile, the second parallel part (PWb) of the third winding (CPW) is placed in all six layers (LY1~LY6) within slots 5, 17, 29, and 41, the second parallel part (PWb) of the third winding (CPW) is placed in three layers (LY1, LY3, LY5) within slots 10, 22, 34, and 46, and the second parallel part (PWb) of the third winding (CPW) is placed in three layers (LY2, LY4, LY6) within slots 12, 24, 36, and 48.

[0238] Ultimately, the third winding (CPW) is placed in 24 of the 48 slots and not in the 24 slots.

[0239] Meanwhile, according to the winding of the motor related to the present disclosure of FIGS. 10a to 10c, as shown in FIG. 7a, the size of the upper end turn region of the upper outer (UPWx) of the stator core (CRE) and the lower end turn region of the lower outer (LPWx) of the stator core (CRE) increases, so the resistance between lines may be significant, and accordingly, heat generation during motor rotation may become a problem.

[0240] Accordingly, the present disclosure proposes a method to reduce heat generation during motor rotation by reducing the resistance between lines while reducing the size of the upper and lower end-turn regions. This is described with reference to FIG. 11a and below.

[0241] FIGS. 11a to 11c are examples of winding of a motor according to an embodiment of the present disclosure.

[0242] FIG. 11a illustrates a parallel pattern (900) of a 4-pitch based hairpin.

[0243] Referring to the drawings, the parallel pattern (900) in the winding of the motor according to an embodiment of the present disclosure has a 4-pitch based hairpin (HP).

[0244] In particular, the parallel pattern (900) in the winding of the motor according to the embodiment of the present disclosure has a 4-pitch based hairpin (HP) in the layers (LY2~LY5), excluding the layer (LY1) adjacent to the outer circumference (ORA) and the layer (LY6) adjacent to the inner circumference (IRA) among the plurality of layers.

[0245] Accordingly, the spacing within the hairpin (HP) can be 4 pitches corresponding to 4 slots as Ds.

[0246] FIG. 11b illustrates a first parallel part and a second parallel part of a first winding including a 4-pitch based hairpin (HP) of FIG. 11a.

[0247] Referring to the drawings, FIG. 11b(a) illustrates a first parallel part (PWa) of a first winding (APW) including a 4-pitch based hairpin (HP).

[0248] The first parallel part (PWa) of the first winding (APW) starts at point 1 of the first layer (LY1) in the 9 slots (S9), passes through point 2 of the first layer (LY1) in the 16 slots (S16), point 3 of the second layer (LY2) in the 12 slots (S12), point 4 of the third layer (LY3) in the 16 slots (S16), point 5 of the fourth layer (LY4) in the 12 slots (S2), point 6 of the fifth layer (LY5) in the 16 slots (S16), point 7 of the sixth layer (LY6) in the 12 slots (S12), point 8 of the sixth layer (LY6) in the 16 slots (S16), and so on, and passes through point 47 of the third layer (LY3) in the 9 slots (S9) and point 48 of the second layer (LY2) in the 5 slots (S5).

[0249] Accordingly, the first parallel part (PWa) of the first winding (APW) is placed in three layers (LY1, LY3, LY5) within slots 9, 16, 21, 28, 33, 40, and 45, and the first parallel part (PWa) of the first winding (APW) is placed in three layers (LY2, LY4, LY6) within slots 5, 12, 17, 24, 29, 36, 41, and 48.

[0250] Meanwhile, the first parallel part (PWa) of the first winding (APW) may further include a 7-pitch based hairpin for connecting one point and two points within the first layer (LY1) adjacent to the outer circumference (ORA) among the plurality of layers (LY1~LY6).

[0251] Meanwhile, the first parallel part (PWa) of the first winding (APW) may further include a 5-pitch based hairpin for connecting points 7 and 8 within the 6th layer (LY6) adjacent to the inner circumference (IRA) among the plurality of layers (LY1~LY6).

[0252] Meanwhile, BDP represents the bending part, and CDP represents the welding part.

[0253] Figure 11b (b) illustrates a second parallel part (PWb) of a first winding (APW) including a 4-pitch based hairpin (HP).

[0254] The second parallel part (PWb) of the first winding (APW) starts at point 1 of the first layer (LY1) within the 10 slots (S10), passes through point 2 of the first layer (LY1) within the 15 slots (S15), point 3 of the second layer (LY2) within the 11 slots (S11), point 4 of the third layer (LY3) within the 15 slots (S15), point 5 of the fourth layer (LY4) within the 11 slots (S11), point 6 of the fifth layer (LY5) within the 15 slots (S15), point 7 of the sixth layer (LY6) within the 11 slots (S11), point 8 of the sixth layer (LY6) within the 15 slots (S15), and so on, to point 47 of the third layer (LY3) within the 10 slots (S10) and point 48 of the second layer (LY2) within the 6 slots (S6). It passes through.

[0255] Accordingly, the first parallel part (PWa) of the first winding (APW) is placed in three layers (LY1, LY3, LY5) within slots 10, 15, 22, 27, 34, 39, and 46, and the second parallel part (PWb) of the first winding (APW) is placed in three layers (LY2, LY4, LY6) within slots 6, 11, 18, 23, 30, 35, 42, and 47.

[0256] Meanwhile, the second parallel part (PWb) of the first winding (APW) may further include a 5-pitch based hairpin for connecting one point and two points within the first layer (LY1) adjacent to the outer circumference (ORA) among the plurality of layers (LY1~LY6).

[0257] Meanwhile, the second parallel part (PWb) of the first winding (APW) may further include a 7-pitch based hairpin for connecting points 7 and 8 within the 6th layer (LY6) adjacent to the inner circumference (IRA) among the plurality of layers (LY1~LY6).

[0258] Meanwhile, according to FIG. 11b, the first parallel part (PWa) of the first winding (APW) is spaced apart within some layers (LY1, LY3, LY5) among the plurality of layers (LY1~LY6), and the second parallel part (PWb) can be spaced apart within other layers (LY2, LY4, LY6) among the plurality of layers (LY1~LY6). Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0259] FIG. 11c illustrates the arrangement of first to third windings (APW~CPW) including a 4-pitch based hairpin (HP) of FIG. 11a. In particular, FIG. 11c illustrates a first embodiment of a winding according to an embodiment of the present disclosure.

[0260] Referring to the drawings, FIG. 11c (a) illustrates a first parallel part (PWa) of a first winding (APW) and a second parallel part (PWb) of a first winding (APW).

[0261] Meanwhile, the first parallel part (PWa) of the first winding (APW) is placed in three layers (LY1, LY3, LY5) within slots 4, 9, 16, 21, 28, 33, 40, and 45, and the first parallel part (PWa) of the first winding (APW) is placed in three layers (LY2, LY4, LY6) within slots 5, 12, 17, 24, 29, 36, 41, and 48.

[0262] Meanwhile, the second parallel part (PWb) of the first winding (APW) is placed in three layers (LY1, LY3, LY5) within slots 3, 10, 15, 22, 27, 34, 39, and 46, and the second parallel part (PWb) of the first winding (APW) is placed in three layers (LY2, LY4, LY6) within slots 6, 11, 18, 23, 30, 35, 42, and 47.

[0263] That is, the first winding (APW) is placed in slots 3–6, 9–12, 15–18, 21–24, 27–30, 33–36, 39–42, and 45–48 out of 48 slots, and is not placed in slots 1–2, 7–8, 13–14, 19–20, 25–26, 31–32, 37–38, and 43–44.

[0264] Ultimately, the first winding (APW) is placed in 36 of the 48 slots and not in 12 slots.

[0265] Meanwhile, a first winding (APW) corresponding to a first phase in a stator (400) according to an embodiment of the present disclosure is disposed across a plurality of layers (LY1 to LY6) between the outer circumference (ORA) and the inner circumference (IRA) of a stator core (CRE), and the first winding (APW) is disposed in a first number of slots among a plurality of slots (1 to 48) and is not disposed in a second number of slots that is less than the first number.

[0266] At this time, the number of multiple slots is 48, the first number is 32, and the second number is 16.

[0267] Accordingly, the size of the upper and lower end-turn regions can be reduced, and the resistance between lines can be reduced. Furthermore, heat generation during motor (250) rotation can be reduced, and in particular, heat generation can be reduced by reducing AC resistance during motor (250) rotation.

[0268] Meanwhile, the first winding (APW) is provided with a first parallel part (PWa) and a second parallel part (PWb) connected in parallel, the first parallel part (PWa) is placed in a third number of slots which is half the number of the first, and the second parallel part (PWb) is placed in a third number of slots, and the third number may be smaller than half the number of slots (1 to 48).

[0269] At this time, the first number may be 32 and the third number may be 16. Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0270] Among the plurality of windings (APW, BPW, CPW), the first winding (APW) corresponding to the first phase is arranged across a plurality of layers (LY1~LY6) between the outer circumference (ORA) and the inner circumference (IRA) of the stator core (CRE), and the first winding (APW) is arranged in a first number of slots among a plurality of slots (1~48) and is not arranged in a second number of slots that is less than the first number. Accordingly, heat generation during motor (250) rotation can be reduced. In particular, heat generation can be reduced by reducing AC resistance during motor (250) rotation.

[0271] Meanwhile, the first winding (APW) is provided with a first parallel part (PWa) and a second parallel part (PWb) connected in parallel, the first parallel part (PWa) is placed in a third number of slots which is half the number of the first, and the second parallel part (PWb) is placed in a third number of slots, and the third number may be smaller than half the number of the plurality of slots (1 to 48). Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0272] Meanwhile, the first winding (APW) is provided with a first parallel part (PWa) and a second parallel part (PWb) connected in parallel, and a portion of the first parallel part (PWa) may be disposed in the n slot of the first layer (LY1) among a plurality of layers (LY1~LY6), another portion of the first parallel part (PWa) may be disposed in the n+7 slot of the first layer (LY1), yet another portion of the first parallel part (PWa) may be disposed in the n+3 slot of the second layer (LY2) adjacent to the first layer (LY1), and yet another portion of the first parallel part (PWa) may be disposed in the n+7 slot of the third layer (LY3) adjacent to the second layer (LY2). Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0273] Meanwhile, the first winding (APW) is provided with a first parallel part (PWa) and a second parallel part (PWb) connected in parallel, and a portion of the second parallel part (PWb) may be disposed in the n+1 slot of the first layer (LY1) among a plurality of layers (LY1~LY6), another portion of the second parallel part (PWb) may be disposed in the n+6 slot of the first layer (LY1), yet another portion of the second parallel part (PWb) may be disposed in the n+2 slot of the second layer (LY2) adjacent to the first layer (LY1), and yet another portion of the second parallel part (PWb) may be disposed in the n+6 slot of the third layer (LY3) adjacent to the second layer (LY2). Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0274] Meanwhile, the first winding (APW) is provided with a first parallel part (PWa) and a second parallel part (PWb) connected in parallel, and a portion of the first parallel part (PWa) may be disposed in the n slot of the first layer (LY1) among a plurality of layers (LY1~LY6), a portion of the second parallel part (PWb) may be disposed in the n+1 slot of the first layer (LY1), another portion of the second parallel part (PWb) may be disposed in the n+2 slot of the second layer (LY2) adjacent to the first layer, and another portion of the first parallel part (PWa) may be disposed in the n+3 slot of the second layer (LY2). Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0275] Meanwhile, the first parallel part (PWa) and the second parallel part (PWb) of the first winding (APW) may not be placed in the n+3 slot and the n+4 slot. Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0276] Meanwhile, the first winding (APW) may include a hairpin (HP5 or HP6) of a first pitch disposed within a layer (LY2~LY5) excluding the layer (LY1) adjacent to the outer circumference (ORA) and the layer (LY6) adjacent to the inner circumference (IRA) among a plurality of layers (LY1~LY6). At this time, the first pitch may be 4 pitches. Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0277] Meanwhile, the first winding (APW) is placed within a layer (LY1) adjacent to the outer circumference (ORA) and may further include a second hairpin (HP1) with a second pitch larger than the first pitch. The second pitch may be 7 pitches. Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0278] Meanwhile, the first winding (APW) is placed within a layer (LY6) adjacent to the inner circumference (IRA) and may further include a third hairpin (HP4) of a third pitch larger than the first pitch or a third hairpin (HP4) of a third pitch smaller than the second pitch. In this case, the third pitch may be 5 pitches. Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0279] Figure 11c (b) illustrates a first parallel part (PWa) of a second winding (BPW) and a second parallel part (PWb) of a first winding (APW).

[0280] Referring to the drawing, Fig. 11c (b) illustrates a first parallel part (PWa) of a second winding (BPW) and a second parallel part (PWb) of a first winding (APW).

[0281] Meanwhile, the first parallel part (PWa) of the second winding (BPW) is placed in three layers (LY1, LY3, LY5) within slots 5, 12, 17, 24, 29, 36, 41, and 48, and the first parallel part (PWa) of the second winding (BPW) is placed in three layers (LY2, LY4, LY6) within slots 1, 8, 13, 20, 25, 32, 37, and 44.

[0282] Meanwhile, the second parallel part (PWb) of the second winding (BPW) is placed in three layers (LY1, LY3, LY5) within slots 6, 11, 18, 23, 30, 35, 42, and 47, and the second parallel part (PWb) of the second winding (BPW) is placed in three layers (LY2, LY4, LY6) within slots 2, 7, 14, 19, 26, 31, 38, and 43.

[0283] That is, the second winding (BPW) is placed in slots 1-2, 5-8, 11-14, 17-20, 23-26, 29-32, 35-38, 41-44, and 47-48 out of 48 slots, and is not placed in slots 3-4, 9-10, 15-16, 21-22, 27-28, 33-34, 39-40, and 45-46.

[0284] Ultimately, the second winding (BPW) is placed in 36 of the 48 slots and not in 12 slots.

[0285] According to FIG. 11b, among the plurality of windings (APW, BPW, CPW), the second winding (BPW) corresponding to the second phase is arranged across the plurality of layers (LY1 to LY6), and the second winding (BPW) may be arranged in the first number of slots among the plurality of slots (1 to 48) and not arranged in the second number of slots. Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0286] Figure 11c (c) illustrates a first parallel part (PWa) of a third winding (CPW) and a second parallel part (PWb) of a first winding (APW).

[0287] Referring to the drawings, (c) of FIG. 11c illustrates a first parallel part (PWa) of a third winding (CPW) and a second parallel part (PWb) of a first winding (APW).

[0288] Meanwhile, the first parallel part (PWa) of the third winding (CPW) is placed in three layers (LY1, LY3, LY5) within slots 1, 8, 13, 20, 25, 32, 37, and 44, and the first parallel part (PWa) of the third winding (CPW) is placed in three layers (LY2, LY4, LY6) within slots 4, 9, 16, 21, 28, 33, 40, and 45.

[0289] Meanwhile, the second parallel part (PWb) of the third winding (CPW) is placed in three layers (LY1, LY3, LY5) within slots 2, 7, 14, 19, 26, 31, 38, and 43, and the second parallel part (PWb) of the third winding (CPW) is placed in three layers (LY2, LY4, LY6) within slots 3, 12, 15, 22, 27, 34, 39, and 46.

[0290] That is, the third winding (CPW) is placed in slots 1–4, 7–10, 13–16, 19–22, 25–28, 31–34, 37–40, and 43–46 out of 48 slots, and is not placed in slots 5–6, 11–12, 17–18, 23–24, 29–30, 35–36, 41–42, and 47–48.

[0291] Ultimately, the third winding (CPW) is placed in 36 of the 48 slots and not in 12 slots.

[0292] According to FIG. 11c, among the plurality of windings (APW, BPW, CPW), the third winding (CPW) corresponding to the third phase is arranged across the plurality of layers (LY1 to LY6), and the third winding (CPW) may be arranged in the first number of slots among the plurality of slots (1 to 48) and not arranged in the second number of slots. Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0293] Meanwhile, according to FIGS. 11a to 11c, at least one winding of the first phase, the second phase, and the third phase may be arranged in each slot within the plurality of slots (1 to 48). Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0294] Meanwhile, in each slot within the plurality of slots (1 to 48), a winding corresponding to two of the first, second, and third phases is arranged, and a winding corresponding to three phases (u, v, w phases) may not be arranged. Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0295] FIG. 12 is another example of a motor winding related to the present disclosure.

[0296] Referring to the drawings, the first to third windings (APW~CPW) of the motor related to the present disclosure include a 6-pitch based hairpin.

[0297] FIG. 12(a) illustrates a first parallel part (PWa) of a first winding (APW) of a motor related to the present disclosure and a second parallel part (PWb) of the first winding (APW).

[0298] Meanwhile, the first parallel part (PWa) of the first winding (APW) is placed in three layers (LY1, LY3, LY5) within slots 1, 2, 13, 14, 25, 26, 37, and 38, and the first parallel part (PWa) of the first winding (APW) is placed in three layers (LY2, LY4, LY6) within slots 7, 8, 19, 20, 31, 32, 43, and 44.

[0299] That is, the first winding (APW) is placed in 16 of the 48 slots and not in 32 slots.

[0300] Meanwhile, looking at a portion of region (PPa) of FIG. 12 (a), the first parallel part (PWa) of the first winding (APW) is arranged in three layers (LY1, LY3, LY5), and the first parallel part (PWa) of the first winding (APW) is arranged in three layers (LY2, LY4, LY6).

[0301] Since the number of these partial regions (PPa) appears to be 8, the winding of FIG. 12 can be named a 6-pitch based 3-phase 8-pole winding.

[0302] FIG. 12(b) illustrates a first parallel part (PWa) of a second winding (BPW) of a motor related to the present disclosure and a second parallel part (PWb) of a second winding (BPW).

[0303] Meanwhile, the first parallel part (PWa) of the second winding (BPW) is placed in three layers (LY1, LY3, LY5) within slots 3, 4, 15, 16, 27, 28, 39, and 40, and the first parallel part (PWa) of the second winding (BPW) is placed in three layers (LY2, LY4, LY6) within slots 9, 10, 21, 22, 33, 34, 45, and 46.

[0304] That is, the second winding (BPW) is placed in 16 of the 48 slots and not in 32 slots.

[0305] FIG. 12 (c) illustrates a first parallel part (PWa) of a third winding (CPW) of a motor related to the present disclosure and a second parallel part (PWb) of a third winding (CPW).

[0306] Meanwhile, the first parallel part (PWa) of the third winding (CPW) is placed in three layers (LY1, LY3, LY5) within slots 5, 6, 17, 18, 29, 30, 41, and 42, and the first parallel part (PWa) of the third winding (CPW) is placed in three layers (LY2, LY4, LY6) within slots 11, 12, 23, 24, 35, 36, 47, and 48.

[0307] That is, the third winding (CPW) is placed in 16 of the 48 slots and not in the 32 slots.

[0308] The winding (APW~CPW) of the motor related to the present disclosure of FIG. 12 is equipped with a 6-pitch based hairpin, so the length of the bent portion of the hairpin increases, and accordingly, the size of the upper and lower end-turn regions increases. Consequently, the resistance between lines increases, and consequently, the heat generated during motor rotation can be significant.

[0309] Accordingly, in the present disclosure, as shown in FIGS. 11a to 11c, the first winding (APW) is positioned in a first number of slots among a plurality of slots (1 to 48) and is not positioned in a second number of slots that is less than the first number. As a result, the length of the bent portion of the 4-pitch-based hairpin is reduced, so the resistance between lines is reduced, and thus the heat generated during motor rotation can be reduced.

[0310] FIGS. 13a to 13c illustrate various examples of windings arranged within a plurality of layers, and FIGS. 14a to 14c are drawings referenced in the description of FIGS. 13a to 13c.

[0311] FIGS. 13a and FIGS. 14a illustrate a winding (APW~CPW) having a 6-pitch based hairpin of FIG. 12.

[0312] Referring to the drawing, within the area (AAa) of two adjacent slots (e.g., slots 43 to 44), only the first parallel part (PWa) and the second parallel part (PWb) of the first winding (APW) corresponding to one phase of the three-phase winding (APW~CPW) are arranged.

[0313] In particular, a first parallel part (PWa) of the first winding (APW) is placed in three layers (LY1, LY3, LY5) within two slots, and a second parallel part (PWb) of the first winding (APW) is placed in three layers (LY2, LY4, LY6) within two slots.

[0314] FIGS. 13b and FIGS. 14b illustrate a winding (APW~CPW) having a 5-pitch based hairpin of FIG. 10c.

[0315] Referring to the drawing, within the area (AAb) of three adjacent slots (e.g., slots 42 to 44), the first parallel part (PWa) and the second parallel part (PWb) of the first winding (APW) among the three-phase windings (APW~CPW), the first parallel part (PWa) of the second winding (BPW), and the first parallel part (PWa) of the third winding (CPW) are respectively arranged.

[0316] That is, all three phase windings (APW~CPW) are placed within the area (AAb) of three adjacent slots (e.g., slots 42 to 44).

[0317] In particular, the first parallel part (PWa) of the first winding (APW) can be placed in the six layers (LY1~LY6) within the 43 slots.

[0318] Meanwhile, the first parallel part (PWa) of the first winding (APW) may be placed in three layers (LY1, LY3, LY5) within the 42 slots, and the first parallel part (PWa) of the third winding (CPW) may be placed in three layers (LY2, LY4, LY6) within the 42 slots.

[0319] Meanwhile, the second parallel part (PWb) of the first winding (APW) can be placed in three layers (LY2, LY4, LY6) within the 42 slots.

[0320] Meanwhile, since the first winding (APW) is placed in all six layers (LY1 to LY6) within the 43 slots, heat generation may be severe around the 43 slots when the motor rotates. Accordingly, the present disclosure proposes a method of using a 4-pitch hairpin, such as in FIGS. 11a to 11c, to disperse the windings within the slots.

[0321] FIGS. 13c and FIGS. 14c illustrate a winding (APW~CPW) having a 4-pitch based hairpin of FIG. 12.

[0322] Referring to the drawing, within the area (AAc) of four adjacent slots (e.g., slots 39 to 42), the first parallel part (PWa) and the second parallel part (PWb) of the first winding (APW) among the three-phase windings (APW~CPW), the first parallel part (PWa) and the first parallel part (PWa) and the second parallel part (PWb) of the second winding (BPW), and the first parallel part (PWa) and the first parallel part (PWb) of the third winding (CPW) are respectively arranged.

[0323] That is, all three phase windings (APW~CPW) are placed within the area (AAc) of four adjacent slots (e.g., slots 39 to 42).

[0324] For example, a second parallel part (PWb) of the first winding (APW) may be placed in three layers (LY1, LY3, LY5) within 39 slots, and a second parallel part (PWb) of the third winding (CPW) may be placed in three layers (LY2, LY4, LY6) within 39 slots.

[0325] Meanwhile, the first parallel part (PWa) of the first winding (APW) may be placed in three layers (LY1, LY3, LY5) within 40 slots, and the first parallel part (PWa) of the third winding (CPW) may be placed in three layers (LY2, LY4, LY6) within 40 slots.

[0326] Meanwhile, the first parallel part (PWa) of the first winding (APW) may be placed in three layers (LY2, LY4, LY6) within the 41 slots, and the first parallel part (PWa) of the second winding (BPW) may be placed in three layers (LY1, LY3, LY5) within the 41 slots.

[0327] Meanwhile, the second parallel part (PWb) of the first winding (APW) may be placed in three layers (LY2, LY4, LY6) within the 42 slots, and the second parallel part (PWb) of the second winding (BPW) may be placed in three layers (LY1, LY3, LY5) within the 42 slots.

[0328] According to FIGS. 13c and 14c, the windings of each phase are all arranged within four adjacent slots, and the first parallel part (PWa) and the second parallel part (PWb) of each phase are each distributed and arranged in only a portion of the six layers. Thus, heat generation during rotation of the motor (250) can be reduced. In particular, heat generation can be reduced by reducing the AC resistance during rotation of the motor (250).

[0329] FIG. 15a is a drawing illustrating an example of winding of a motor according to one embodiment of the present disclosure.

[0330] Referring to the drawings, among the windings (APW, BPW, CPW) of a motor (250) according to one embodiment of the present disclosure, the first winding (APW) is arranged across a plurality of layers (LY1~LY6) between the outer circumference (ORA) and the inner circumference (IRA) of a stator core (CRE), and the first winding (APW) is arranged in a first number of slots among a plurality of slots (1~48) and is not arranged in a second number of slots that is less than the first number.

[0331] In particular, FIG. 15a illustrates that there are six layers (LY1~LY6).

[0332] Meanwhile, the first winding (APW) may have a first parallel part (PWa) of the first winding (APW) of FIG. 15a (a) and a second parallel part (PWb) of the first winding (APW) of FIG. 15a (b).

[0333] Meanwhile, the first winding (APW) may include a first pitch-based hairpin (HP5 or HP6) within the layers (LY2~LY5) excluding the layer (LY1) adjacent to the outer circumference (ORA) and the layer (LY6) adjacent to the inner circumference (IRA) among the plurality of layers (LY1~LY6).

[0334] At this time, the first pitch may be a 4-pitch corresponding to 4 slots. Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0335] Meanwhile, the first parallel part (PWa) of the first winding (APW) is placed within a layer (LY1) adjacent to the outer circumference (ORA) as in (a) of FIG. 15a, and may further include a second hairpin (HP1) with a second pitch larger than the first pitch. The second pitch may be 7 pitches. Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0336] Meanwhile, the first parallel part (PWa) of the first winding (APW) is placed within a layer (LY6) adjacent to the inner circumference (IRA), as in (a) of FIG. 15a, and may further include a third hairpin (HP4) with a third pitch larger than the first pitch or a third hairpin (HP4) with a third pitch smaller than the second pitch. In this case, the third pitch may be 5 pitches. Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0337] Meanwhile, as in part area (QM) of FIG. 15a (a), the first parallel part (PWa) of the first winding (APW) is placed in three layers (LY1, LY3, LY5) within 9 slots, the first parallel part (PWa) of the first winding (APW) is not placed in slots 10 and 11, and the first parallel part (PWa) of the first winding (APW) can be placed in three layers (LY2, LY4, LY6) within 12 slots.

[0338] Meanwhile, the second parallel part (PWb) of the first winding (APW) is placed within a layer (LY1) adjacent to the outer circumference (ORA) as in (b) of FIG. 15a, and may further include a third hairpin (HP4) with a third pitch larger than the first pitch or a third hairpin (HP2) with a third pitch smaller than the second pitch. Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0339] Meanwhile, the second parallel part (PWb) of the first winding (APW) is placed within a layer (LY6) adjacent to the inner circumference (IRA), as shown in (b) of FIG. 15a, and may further include a second hairpin (HP3) with a second pitch larger than the first pitch. Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0340] Meanwhile, according to FIG. 15a, a first winding (APW) according to another embodiment of the present disclosure is positioned across a plurality of layers (LY1 to LY6) between the outer circumference (ORA) and the inner circumference (IRA) of a stator core (CRE), and is positioned in some of the plurality of slots (1 to 48).

[0341] Meanwhile, the first winding (APW) includes a hairpin (HP5 or HP6) of a first pitch disposed within a layer (LY2~LY5) excluding the layer (LY1) adjacent to the outer circumference (ORA) and the layer (LY6) adjacent to the inner circumference (IRA) among a plurality of layers (LY1~LY6), and a second hairpin (HP1) of a second pitch greater than the first pitch disposed within the layer (LY1) adjacent to the outer circumference (ORA).

[0342] The first pitch in the hairpin of the first pitch (HP5 or HP6) described above may be 4 pitches, and the second pitch in the second hairpin (HP1) of the second pitch may be 7 pitches.

[0343] Accordingly, heat generation during rotation of the motor (250) can be reduced. In particular, by reducing the AC resistance during rotation of the motor (250), heat generation can be reduced.

[0344] Meanwhile, the first winding (APW) is placed within a layer (LY6) adjacent to the inner circumference (IRA) and may further include a third hairpin (HP4) of a third pitch larger than the first pitch or a third hairpin (HP4) of a third pitch smaller than the second pitch. In this case, the third pitch may be 5 pitches. Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0345] FIG. 15b is a drawing illustrating an example of winding of a motor according to another embodiment of the present disclosure.

[0346] Referring to the drawings, among the windings (APW, BPW, CPW) of a motor (250) according to another embodiment of the present disclosure, the first winding (APW) is arranged across a plurality of layers (LY1~LY8) between the outer circumference (ORA) and the inner circumference (IRA) of a stator core (CRE), and the first winding (APW) is arranged in a first number of slots among a plurality of slots (1~48) and is not arranged in a second number of slots that is less than the first number.

[0347] In particular, FIG. 15b illustrates a plurality of layers (LY1~LY8) with 8 layers.

[0348] Meanwhile, the first winding (APW) may have a first parallel part (PWa) of the first winding (APW) of FIG. 15b (a) and a second parallel part (PWb) of the first winding (APW) of FIG. 15b (b).

[0349] Meanwhile, the first winding (APW) may include a first pitch-based hairpin (HP5 or HP6) within the layers (LY2~LY7), excluding the layer (LY1) adjacent to the outer circumference (ORA) and the layer (LY8) adjacent to the inner circumference (IRA) among the plurality of layers (LY1~LY6).

[0350] Meanwhile, the first parallel part (PWa) of the first winding (APW) is placed within a layer (LY1) adjacent to the outer circumference (ORA) as in (a) of FIG. 15b, and may further include a second hairpin (HP1) with a second pitch larger than the first pitch. Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0351] Meanwhile, the first parallel part (PWa) of the first winding (APW) is disposed within a layer (LY8) adjacent to the inner circumference (IRA), as in (a) of FIG. 15b, and may further include a third hairpin (HP4) with a third pitch larger than the first pitch or a third hairpin (HP4) with a third pitch smaller than the second pitch. Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0352] FIG. 15c is a drawing illustrating an example of winding of a motor according to another embodiment of the present disclosure.

[0353] Referring to the drawings, among the windings (APW, BPW, CPW) of a motor (250) according to another embodiment of the present disclosure, the first winding (APW) is arranged across a plurality of layers (LY1~LY6) between the outer circumference (ORA) and the inner circumference (IRA) of the stator core (CRE), and the first winding (APW) is arranged in a first number of slots among a plurality of slots (1~48) and is not arranged in a second number of slots that is less than the first number. Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0354] In particular, FIG. 15c illustrates a plurality of layers (LY1~LY6) with six layers.

[0355] Meanwhile, the first winding (APW) may have a first parallel part (PWa) of the first winding (APW) of FIG. 15c (a) and a second parallel part (PWb) of the first winding (APW) of FIG. 15c (b).

[0356] For example, the first parallel part (PWa) may be placed in a first number of slots, and the second parallel part (PWb) may be placed in a first number of slots. In this case, the first number may be 32 and the second number may be 16.

[0357] Meanwhile, the first winding (APW) may include hairpins of different pitches within layers (LY2~LY5), excluding the layer (LY1) adjacent to the outer circumference (ORA) and the layer (LY6) adjacent to the inner circumference (IRA) among the plurality of layers (LY1~LY6).

[0358] Specifically, the first winding (APW) may include a third pitch-based hairpin larger than the first pitch and a fourth pitch-based hairpin smaller than the first pitch within the layers (LY2~LY5) excluding the layer (LY1) adjacent to the outer circumference (ORA) and the layer (LY6) adjacent to the inner circumference (IRA) among the plurality of layers (LY1~LY6).

[0359] At this time, the first pitch may be a 4-pitch corresponding to 4 slots, the third pitch may be a 5-pitch corresponding to 5 slots, and the fourth pitch may be a 3-pitch corresponding to 3 slots.

[0360] In particular, the first winding (APW) can alternately arrange a third pitch-based hairpin and a fourth pitch-based hairpin within layers (LY2~LY5), excluding the layer (LY1) adjacent to the outer circumference (ORA) and the layer (LY6) adjacent to the inner circumference (IRA) among the plurality of layers (LY1~LY6).

[0361] Accordingly, similar to the use of a 4-pitch hairpin in Fig. 15a, the resistance between lines can be reduced, and consequently, the heat generated during rotation of the motor (250) can be reduced.

[0362] Meanwhile, the first parallel part (PWa) within the first winding (APW) may further include a 7-pitch hairpin in the layer (LY1) adjacent to the outer circumference (ORA) among the plurality of layers (LY1~LY6), as shown in (a) of FIG. 15c.

[0363] Meanwhile, the first parallel part (PWa) within the first winding (APW) may further include a 5-pitch hairpin in the layer (LY6) adjacent to the inner circumference (IRA) among the plurality of layers (LY1~LY6), as shown in (a) of FIG. 15c.

[0364] FIG. 16a is an example of the winding of FIG. 15c. In particular, FIG. 16a illustrates a second embodiment of the winding according to an embodiment of the present disclosure.

[0365] Referring to the drawing, FIG. 16a (a) illustrates a first parallel part (PWa) of a first winding (APW) and a second parallel part (PWb) of a first winding (APW).

[0366] The first parallel part (PWa) of the first winding (APW) starts at point 1 of the first layer (LY1) in the 9 slots (S9), passes through point 2 of the first layer (LY1) in the 16 slots (S16), point 3 of the second layer (LY2) in the 12 slots (S12), point 4 of the third layer (LY3) in the 15 slots (S15), point 5 of the fourth layer (LY4) in the 11 slots (S11), point 6 of the fifth layer (LY5) in the 16 slots (S16), point 7 of the sixth layer (LY6) in the 12 slots (S12), point 8 of the sixth layer (LY6) in the 17 slots (S17), and passes through point 47 of the third layer (LY3) in the 10 slots (S10) and point 48 of the second layer (LY2) in the 5 slots (S5).

[0367] That is, the first parallel part (PWa) of the first winding (APW) may include a 3-pitch based hairpin and a 5-pitch based hairpin that are alternately arranged within the layers (LY2~LY5), excluding the layer (LY1) adjacent to the outer circumference (ORA) and the layer (LY6) adjacent to the inner circumference (IRA) among the plurality of layers (LY1~LY6).

[0368] Similarly, the second parallel part (PWb) of the first winding (APW) may include a 3-pitch based hairpin and a 5-pitch based hairpin alternately arranged within layers (LY2~LY5), excluding the layer (LY1) adjacent to the outer circumference (ORA) and the layer (LY6) adjacent to the inner circumference (IRA) among the plurality of layers (LY1~LY6).

[0369] That is, according to FIG. 16a (a), the first winding (APW) is provided with a first parallel part (PWa) and a second parallel part (PWb) connected in parallel, and a portion of the first parallel part (PWa) is disposed in the n slot of the first layer (LY1) among a plurality of layers (LY1~LY6), another portion of the first parallel part (PWa) is disposed in the n+7 slot of the first layer (LY1), yet another portion of the first parallel part (PWa) is disposed in the n+3 slot of the second layer (LY2) adjacent to the first layer (LY1), and yet another portion of the first parallel part (PWa) is disposed in the n+6 slot of the third layer (LY3) adjacent to the second layer (LY2). Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0370] Meanwhile, the first winding (APW) is provided with a first parallel part (PWa) and a second parallel part (PWb) connected in parallel, and a portion of the second parallel part (PWb) may be disposed in the n+1 slot of the first layer (LY1) among a plurality of layers (LY1~LY6), another portion of the second parallel part (PWb) may be disposed in the n+6 slot of the first layer (LY1), yet another portion of the second parallel part (PWb) may be disposed in the n+2 slot of the second layer (LY2) adjacent to the first layer (LY1), and yet another portion of the second parallel part (PWb) may be disposed in the n+7 slot of the third layer (LY3) adjacent to the second layer (LY2). Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0371] Meanwhile, the first winding (APW) is provided with a first parallel part (PWa) and a second parallel part (PWb) connected in parallel, and a portion of the first parallel part (PWa) may be disposed in the n slot of the first layer (LY1) among a plurality of layers (LY1~LY6), a portion of the second parallel part (PWb) may be disposed in the n+1 slot of the first layer (LY1), another portion of the second parallel part (PWb) may be disposed in the n+2 slot of the second layer (LY2) adjacent to the first layer, and another portion of the first parallel part (PWa) may be disposed in the n+3 slot of the second layer (LY2). Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0372] Meanwhile, the first parallel part (PWa) and the second parallel part (PWb) of the first winding (APW) may not be placed in the n+3 slot and the n+4 slot. Accordingly, heat generation during rotation of the motor (250) can be reduced.

[0373] Figure 16a (b) illustrates a first parallel part (PWa) of a second winding (BPW) and a second parallel part (PWb) of a second winding (BPW).

[0374] Referring to the drawings, the second winding (BPW) may include 3-pitch based hairpins and 5-pitch based hairpins alternately arranged within layers (LY2~LY5), excluding the layer (LY1) adjacent to the outer circumference (ORA) and the layer (LY6) adjacent to the inner circumference (IRA), similar to the first winding (APW).

[0375] Figure 16a (c) illustrates a first parallel part (PWa) of a third winding (CPW) and a second parallel part (PWb) of a third winding (CPW).

[0376] Referring to the drawings, the third winding (CPW) may include 3-pitch based hairpins and 5-pitch based hairpins alternately arranged within layers (LY2~LY5), excluding the layer (LY1) adjacent to the outer circumference (ORA) and the layer (LY6) adjacent to the inner circumference (IRA), similar to the first winding (APW).

[0377] FIG. 16b illustrates a first embodiment of winding according to an embodiment of the present disclosure, as in FIG. 11c.

[0378] Referring to the drawings, FIG. 16b illustrates that, as in FIG. 11c, the first winding (APW) includes a 4-pitch hairpin within layers (LY2~LY5) excluding the layer (LY1) adjacent to the outer circumference (ORA) and the layer (LY6) adjacent to the inner circumference (IRA) among the plurality of layers (LY1~LY6).

[0379] According to FIG. 16b, the first parallel part (PWa) of the first winding (APW) is spaced apart and arranged within the three layers (LY1, LY3, LY5) within the 9 slots.

[0380] Meanwhile, according to FIG. 16a, the first parallel part (PWa) of the first winding (APW), the second parallel part (PWb) of the first winding (APW), and the first parallel part (PWa) of the first winding (APW) are spaced apart and arranged within the three layers (LY1, LY3, LY5) within the 9 slots, respectively.

[0381] That is, in the first winding (APW) including the 3-pitch based hairpin and the 5-pitch based hairpin of FIG. 16a, the first parallel part (PWa) and the second parallel part (PWb) are alternately spaced apart within the same slot. Thus, heat generation can be further reduced.

[0382] Figure 17a illustrates various examples of hairpins.

[0383] Fig. 17a (a) illustrates hairpins of 5 pitch (DPm1), and Fig. 17b (a) illustrates hairpins of 4 pitch (DPm2).

[0384] In the stator core (CRE), the lengths of the 5-pitch hairpins and the 4-pitch hairpins may be the same as shown in the drawing.

[0385] Meanwhile, since the size of the bend or peak portion of the 5-pitch (DPm1) hairpin is larger, the length of the area protruding upward from the outside of the stator core (CRE) is hh1 and hh2, which appears larger in the case of the 5-pitch (DPm1) hairpin. In other words, the smaller the pitch, the smaller the size of the end turn becomes.

[0386] Accordingly, as described above, the resistance between wires is reduced when using a 4-pitch hairpin compared to when using a 5-pitch hairpin.

[0387] FIG. 17b illustrates a performance graph of a motor corresponding to the hairpin of FIG. 17.

[0388] Referring to the drawings, GRa represents a performance graph of a motor including a 5-pitch (DPm1) hairpin in (a) of FIG. 17a, and GRb represents a performance graph of a motor including a 4-pitch (DPm2) hairpin in (b) of FIG. 17a.

[0389] It can be seen that when the motor speed is less than TT1, the torque of GRa is greater, but when the motor speed is greater than TT1, the torque of GRb is greater.

[0390] That is, when the motor rotates at high speed, it is preferable to use a motor (250) that includes a 4-pitch hairpin.

[0391] Although preferred embodiments of the present disclosure have been illustrated and described above, the present disclosure is not limited to the specific embodiments described above. Various modifications are possible by those skilled in the art without departing from the essence of the present disclosure as claimed in the claims, and such modifications should not be understood individually from the technical spirit or perspective of the present disclosure.

Claims

1. A stator core in which multiple slots are formed; A plurality of windings disposed between the inner and outer circumferences of the stator core; including The first winding corresponding to the first phase among the plurality of windings is, It is arranged across a plurality of layers between the outer circumference and the inner circumference of the stator core, and The above-mentioned first winding is, A stator that is placed in a first number of slots among the plurality of slots above and is not placed in a second number of slots that is less than the first number.

2. In Paragraph 1, The above-mentioned first winding is, It has a first parallel part and a second parallel part connected in parallel, and The first parallel part is placed in a third number of slots, which is half the number of the first number, and The above second parallel part is placed in the above third number of slots, and The third number is a stator that is smaller than half the number of the plurality of slots.

3. In Paragraph 1, The above-mentioned first winding is, It has a first parallel part and a second parallel part connected in parallel, and A portion of the first parallel part is disposed in the n slot of the first layer among the plurality of layers above, and Another part of the first parallel part is placed in the n+7 slot of the first layer, and Another part of the first parallel part is placed in the n+3 slot of the second layer adjacent to the first layer, and A stator in which another part of the first parallel part is placed in the n+7 slot of the third layer adjacent to the second layer.

4. In Paragraph 3, The above-mentioned first winding is, It has a first parallel part and a second parallel part connected in parallel, and A portion of the second parallel part is disposed in the n+1 slot of the first layer among the plurality of layers above, and Another part of the second parallel part is placed in the n+6 slot of the first layer, and Another part of the second parallel part is placed in the n+2 slot of the second layer adjacent to the first layer, and A stator in which another part of the second parallel part is placed in the n+6 slot of the third layer adjacent to the second layer.

5. In Paragraph 1, The above-mentioned first winding is, It has a first parallel part and a second parallel part connected in parallel, and A portion of the first parallel part is disposed in the n slot of the first layer among the plurality of layers above, and Another part of the first parallel part is placed in the n+7 slot of the first layer, and Another part of the first parallel part is placed in the n+3 slot of the second layer adjacent to the first layer, and A stator in which another part of the first parallel part is placed in the n+6 slot of the third layer adjacent to the second layer.

6. In Paragraph 5, The above-mentioned first winding is, It has a first parallel part and a second parallel part connected in parallel, and A portion of the second parallel part is disposed in the n+1 slot of the first layer among the plurality of layers above, and Another part of the second parallel part is placed in the n+6 slot of the first layer, and Another part of the second parallel part is placed in the n+2 slot of the second layer adjacent to the first layer, and A stator in which another part of the second parallel part is placed in the n+7 slot of the third layer adjacent to the second layer.

7. In Paragraph 1, The above-mentioned first winding is, It has a first parallel part and a second parallel part connected in parallel, and A portion of the first parallel part is disposed in the n slot of the first layer among the plurality of layers above, and A portion of the second parallel part is placed in the n+1 slot of the first layer, and Another part of the second parallel part is placed in the n+2 slot of the second layer adjacent to the first layer, and A stator in which another part of the first parallel part is placed in the n+3 slot of the second layer.

8. In Paragraph 1, The above-mentioned first winding is, A stator comprising a first pitch hairpin disposed within a layer excluding the layer adjacent to the outer circumference and the layer adjacent to the inner circumference among the plurality of layers above.

9. In Paragraph 8, The above-mentioned first winding is, A stator disposed within a layer adjacent to the outer circumference above, further comprising a second hairpin of a second pitch larger than the first pitch.

10. In Paragraph 8, The above-mentioned first winding is, A stator disposed within a layer adjacent to the above inner circumference and further comprising a third hairpin of a third pitch larger than the first pitch.

11. In Paragraph 9, The above-mentioned first winding is, A stator comprising, in a layer adjacent to the above inner circumference, a third hairpin of a third pitch smaller than the second pitch.

12. In Paragraph 1, The second winding corresponding to the second phase among the plurality of windings above is, Arranged across the aforementioned plurality of layers, The above second winding is, A stator that is placed in the first number of slots among the plurality of slots and is not placed in the second number of slots.

13. In Paragraph 12, The third winding corresponding to the third phase among the plurality of windings above is, Arranged across the aforementioned plurality of layers, The above third winding is, A stator that is placed in the first number of slots among the plurality of slots and is not placed in the second number of slots.

14. In Paragraph 13, In each slot within the aforementioned plurality of slots, A stator having at least one winding among the first phase, the second phase, and the third phase arranged therein.

15. In Paragraph 1, The above-mentioned first winding is, A stator comprising hairpins of different pitches within a layer excluding the layer adjacent to the outer circumference and the layer adjacent to the inner circumference among the plurality of layers above.

16. In Paragraph 14, The above-mentioned first winding is, It has a first parallel part and a second parallel part connected in parallel, and The first parallel part is placed in the first number of slots, and The above second parallel part is a stator that is placed in the above first number of slots.

17. In Paragraph 2, The first parallel part within the first winding is spaced apart and arranged within a plurality of layers, A stator in which the second parallel part within the first winding is spaced apart and arranged within a plurality of layers.

18. A stator core in which multiple slots are formed; A plurality of windings disposed between the inner and outer circumferences of the stator core; including The first winding corresponding to the first phase among the plurality of windings is, It is disposed across a plurality of layers between the outer circumference and the inner circumference of the stator core, and is disposed in some of the plurality of slots, The above-mentioned first winding is, A stator comprising a first pitch hairpin disposed within a layer excluding the outer circumference adjacent layer and the inner circumference adjacent layer among the plurality of layers, and a second pitch hairpin disposed within the outer circumference adjacent layer and having a second pitch greater than the first pitch.

19. In Paragraph 18, The above-mentioned first winding is, A stator disposed within a layer adjacent to the above inner circumference and further comprising a third hairpin of a third pitch smaller than the second pitch.

20. A stator of any one of paragraphs 1 through 19; A motor comprising a rotor disposed in the hollow of the stator and rotating therein.

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