Inverter module and electric compressor comprising the same

Abstract

An inverter module according to an embodiment of the present application includes a high-voltage circuit unit that generates an inverter control voltage and a motor drive voltage by using a first DC voltage, a high-voltage circuit pattern that electrically connects the high-voltage circuit unit, a low-voltage circuit unit that communicates with an external device by using a second DC voltage having a smaller amplitude than the first DC voltage, and a low-voltage circuit pattern that electrically connects the low-voltage circuit unit. The high-voltage circuit pattern and the low-voltage circuit pattern are spaced apart from each other.

Description

TECHNICAL FIELD

[0001] Embodiments relate to an inverter module and an electric compressor including the same. BACKGROUND

[0002] An inverter is a power conversion device that can control a motor by receiving alternating current (AC) commercial power and converting the AC commercial power into direct current (DC) commercial power and then converting the DC commercial power back into the AC commercial power for motor control. The inverter is used in various forms such as fans, pumps, elevators, transfer devices, and production lines throughout the industry. In the general power conversion principle of a general-purpose inverter for motor driving, three-phase AC commercial power is received and then converted into DC commercial power through a rectifier circuit, and the DC commercial power is stored in a DC link capacitor and then converted into AC commercial power through an inverter.

[0003] The inverter module can be roughly divided into a high-voltage part and a low-voltage part. The high-voltage part is composed of elements for operating power of a main integrated circuit (IC) and motor operating power, and the low-voltage part driven by a voltage of about 12V is composed of communication elements for controller area network (CAN) communication with a vehicle. A power semiconductor switching element mainly used for the high-voltage part includes an insulated gate bipolar transistor (IGBT), a metal oxide silicon field effect transistor (MOSFET), etc. The IGBT can operate in a voltage range of 300V or more and is suitable for a high-efficiency and high-speed power system.

[0004] Figure 1 FIG. 1 is a diagram illustrating an example of an inverter module.

[0005] Figure 1 The inverter module shown in FIG. 1 is implemented in a manner in which a high-voltage circuit pattern 20 electrically connecting high-voltage circuit units 12 and 13 and a low-voltage circuit pattern 40 electrically connecting low-voltage circuit units 31 and 32 cross each other. Therefore, since noise coupling occurs between the high-voltage circuit pattern 20 and the low-voltage circuit pattern 40 due to conducted emission (CE), a problem of electromagnetic compatibility (EMC) deterioration can occur.

[0006] In addition, since a separation interval between the low-voltage connector 31 and the low-voltage circuit part 32 among the low-voltage circuit units increases, a problem of electromagnetic compatibility deterioration can occur.

[0007] In addition, since portions that are not electrically connected among the element 12 using a 15 [V] voltage and the element 13 using a 3.3 [V] voltage among the high-voltage circuit unit become closer to each other, a problem of noise coupling occurs between the element 12 using a 15 [V] voltage and the element 13 using a 3.3 [V] voltage, and thus deterioration of electromagnetic compatibility can occur.

[0008] The technology behind the present invention is disclosed in Korean Patent Publication No. 10-2015-0108165 (published on September 25, 2015). SUMMARY

[0009] TECHNICAL PROBLEM

[0010] The embodiment aims to provide an inverter module capable of reducing noise coupling occurring between high-voltage components and low-voltage components thereof.

[0011] The problems solved by the present invention are not limited to the above problems, and also include objects and effects understood from the solutions and embodiments to be described below.

[0012] TECHNICAL SOLUTION

[0013] The inverter module according to the embodiment of the present invention includes a high-voltage circuit unit configured to generate an inverter control voltage and a motor drive voltage using a first direct current (DC) voltage, a high-voltage circuit pattern configured to electrically connect the high-voltage circuit unit, a low-voltage circuit unit configured to communicate with an external device using a second DC voltage having a smaller amplitude than the first DC voltage, and a low-voltage circuit pattern configured to electrically connect the low-voltage circuit unit, wherein the high-voltage circuit pattern and the low-voltage circuit pattern are disposed to be spaced apart from each other.

[0014] The high-voltage circuit pattern and the low-voltage circuit pattern can be printed on a board, and a region in which the high-voltage circuit pattern is printed and a region in which the low-voltage circuit pattern is printed can be separated from each other on the board.

[0015] The high-voltage circuit unit can include a first circuit component driven by the first DC voltage, a second circuit component driven by a third DC voltage having a smaller amplitude than the first DC voltage, and a third circuit component driven by a fourth DC voltage having a smaller amplitude than the third DC voltage.

[0016] The first circuit part can include a first switch mode power supply (SMPS) configured to generate a third DC voltage through a first DC voltage, and a plurality of switching elements configured to convert the first DC voltage into a motor driving voltage through switching driving.

[0017] The second circuit part can include a second SMPS configured to generate a fourth DC voltage through the third DC voltage, and a gate driver configured to control the plurality of switching elements through the third DC voltage.

[0018] The first circuit part can include a processor configured to control the gate driver through the fourth DC voltage and communicate with a low voltage circuit unit.

[0019] The first circuit part, the second circuit part, and the third circuit part can be disposed on a high voltage circuit pattern.

[0020] The first circuit part, the second circuit part, and the third circuit part can be sequentially disposed according to a current direction during inverter driving.

[0021] A plurality of elements constituting the second circuit part can be sequentially disposed along a first direction, and a plurality of elements constituting the third circuit part can be sequentially disposed along a second direction forming a predetermined angle with the first direction.

[0022] The plurality of elements constituting the third circuit part can be sequentially disposed to be farther apart from the second circuit part along the second direction.

[0023] The low voltage circuit unit can include a connector part configured to receive a second DC voltage, and a fourth circuit part configured to communicate with an external device through the second DC voltage.

[0024] The connector part and the fourth circuit part can be disposed on a low voltage circuit pattern.

[0025] The connector part and the fourth circuit part can be disposed to be spaced apart from each other, and the high voltage circuit pattern can be disposed not to cross between the connector part and the fourth circuit part.

[0026] The inverter module can further include a transceiver configured to transmit a signal between the high voltage circuit unit and the low voltage circuit unit.

[0027] The transceiver can include an insulating element configured to insulate the high voltage circuit unit and the low voltage circuit unit.

[0028] An electric compressor according to an embodiment of the present application includes the above-described inverter module.

[0029] Advantageous Effects

[0030] According to embodiments, electromagnetic compatibility of the inverter module can be increased.

[0031] Advantageous effects of the present application are not limited to the above-mentioned and can be readily understood in the course of the following detailed description of exemplary embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a diagram illustrating an example of an inverter module.

[0033] Figure 2 is a configuration diagram of an inverter module according to an embodiment of the present application.

[0034] Figure 3 is a configuration diagram of a high-voltage circuit unit according to an embodiment of the present application.

[0035] Figure 4 is a configuration diagram of a low-voltage circuit unit according to an embodiment of the present application.

[0036] Figure 5 is a diagram illustrating an inverter module according to an embodiment of the present application.

[0037] Figure 6 is a diagram for describing a voltage supply flow of an inverter module according to an embodiment of the present application. DETAILED DESCRIPTION

[0038] Since the present application can vary and have various embodiments, specific embodiments will be illustrated and described in the drawings. However, it should be understood that the present application is not limited to the specific embodiments and includes all changes, equivalents, and alternatives within the spirit and scope of the present application.

[0039] Further, it should be understood that although the terms "second", "first", and the like can be used herein to describe various elements, the elements are not limited by the terms. The terms are only used to distinguish one element from another element. For example, a first element can be termed a second element, and similarly, a second element can be termed a first element without departing from the scope of the present application. The term "and / or" includes any one of a plurality of related listed items or any combination thereof.

[0040] When a predefined component is mentioned as being "linked" or "connected" to other components, the component can be directly linked or connected to the other components, but it should be understood that additional components can be present therebetween. On the other hand, when it is mentioned that a predefined component is "directly linked" or "directly connected" to other components, it should be understood that no additional components are present between the above-mentioned components.

[0041] The terms used in the present application are used only to describe specific embodiments and not to limit the present application. Singular forms are intended to include plural forms unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," "includes" and / or "including," "provides" and / or "provided," "provides" and / or "provided," and / or "has" and / or "having" specify the presence of stated features, integers, steps, operations, elements, components, and / or combinations thereof but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or combinations thereof.

[0042] Unless otherwise defined, all terms including technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0043] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings, like reference numerals are applied to like or corresponding elements, and redundant descriptions thereof will be omitted.

[0044] Figure 2 is a configuration diagram of an inverter module according to an embodiment of the present application.

[0045] The inverter module according to an embodiment of the present application can be a device provided in a vehicle to supply power to various components such as a vehicle air conditioner, but is not limited thereto.

[0046] Referring to Figure 2 , the inverter module 100 according to an embodiment of the present application can include a high-voltage circuit unit 110, a high-voltage circuit pattern 120, a low-voltage circuit unit 130, and a low-voltage circuit pattern 140, and can further include an insulating element (transceiver) 150.

[0047] The high-voltage circuit unit 110 generates an inverter control voltage and a motor driving voltage using a first direct current (DC) voltage. Specifically, the high-voltage circuit unit 110 can generate a motor driving voltage and an inverter control voltage for generating the motor driving voltage using a first DC voltage applied from an external power source. Here, the external power source refers to a power source that supplies power from the outside of the inverter module. For example, the external power source can be a battery included in a vehicle. The high-voltage circuit unit 110 can receive the first DC voltage and include a plurality of elements for generating the motor driving voltage and the inverter control voltage. The plurality of elements can be grouped by the functions of the high-voltage circuit unit 110. Further, the first DC voltage can mean a high voltage applied to the inverter module 100. The first DC voltage can be a voltage greater than 15 [V].

[0048] The high-voltage circuit pattern 120 electrically connects the high-voltage circuit unit 110. Specifically, the high-voltage circuit pattern 120 can electrically connect a plurality of elements included in the high-voltage circuit unit 110 so that the high-voltage circuit unit 110 performs a function. The high-voltage circuit pattern 120 can be implemented in a shape printed on a board.

[0049] The low-voltage circuit unit 130 communicates with an external device using a second DC voltage. Here, the external device can refer to a device disposed outside the inverter module. For example, the external device can be an on-board diagnostic (OBD) module installed in a vehicle. The low-voltage circuit unit 130 can receive the second DC voltage and include a plurality of elements for performing communication with the external device. The plurality of elements can be grouped by a function of the low-voltage circuit unit 130. Further, the second DC voltage can mean a low voltage applied to the inverter module 100. The second DC voltage can be smaller than the first DC voltage. The second DC voltage can be a voltage of 12 [V].

[0050] Next, the low-voltage circuit pattern 140 electrically connects the low-voltage circuit unit 130. Specifically, the low-voltage circuit unit 130 can electrically connect a plurality of elements included in the low-voltage circuit unit 130 so that the low-voltage circuit unit 130 performs a function. The low-voltage circuit pattern 140 can be implemented in a shape printed on a board.

[0051] Next, the transceiver 150 can transmit a signal between the high-voltage circuit unit 110 and the low-voltage circuit unit 130. In this case, the transceiver 150 can be implemented as an insulating element so that power does not flow between the high-voltage circuit unit 110 and the low-voltage circuit unit 130. For example, the transceiver 150 can include an optical coupler or an opto-coupler. Accordingly, the inverter module according to the embodiment of the present application can prevent coupled noise generated between the high-voltage circuit unit 110 and the low-voltage circuit unit 130.

[0052] Figure 3 is a configuration diagram of a high-voltage circuit unit according to an embodiment of the present application.

[0053] As Figure 3 shown, the high-voltage circuit unit 110 according to the embodiment of the present application can include a first circuit part 111, a second circuit part 112, and a third circuit part 113. The first circuit part 111, the second circuit part 112, and the third circuit part 113 can be classified according to the magnitude of the applied voltage.

[0054] First, the first circuit part 111 can implement a predetermined function using the first DC voltage as an input voltage. The first circuit part 111 can generate a motor driving voltage and a third DC voltage through the first DC voltage. To this end, the first circuit part 111 can include a first switch mode power supply (SMPS) and a plurality of switching elements.

[0055] Specifically, the first SMPS generates a third DC voltage smaller than the first DC voltage through the first DC voltage. In this case, the first SMPS can be a circuit including a switching transistor or the like. The first SMPS can generate the third DC voltage through the first DC voltage by controlling a ratio of on and off times of a semiconductor switching transistor. Here, the third DC voltage can be a voltage of 15 [V]. The generated third DC voltage is applied to the second circuit part 112.

[0056] Next, the plurality of switching elements convert the first DC voltage into a motor driving voltage through switching driving. In this case, a motor receiving the motor driving voltage can be a three-phase motor. Accordingly, the motor driving voltage can be a three-phase AC voltage. The plurality of switching elements can be implemented as at least one of an insulated gate bipolar transistor (IGBT) and a metal oxide semiconductor field effect transistor (MOSFET). For example, the plurality of switching elements can be implemented as six switching elements. When the plurality of switching elements are implemented as six switching elements, since one of three switching elements connected to a high side is turned on and one of three switching elements connected to a low side is turned on, the first DC voltage is converted into the motor driving voltage. In this case, when switching of the same phase is turned on at the same time, since a voltage is not applied to the motor, switching located in different phases can be turned on. Similarly to the above, the plurality of switching elements can repeatedly turn on and off according to a predetermined rule to generate the motor driving voltage.

[0057] The second circuit part 112 can implement a predetermined function using the third DC voltage as an input voltage. The second circuit part 112 can generate a fourth DC voltage and control the switching elements of the first circuit part 111. To this end, the second circuit part 112 can include a second SMPS and a gate driver.

[0058] Specifically, the second SMPS generates a fourth DC voltage smaller than the third DC voltage through the third DC voltage. In this case, the second SMPS can be a circuit including a switching transistor or the like, and can generate the fourth DC voltage through the third DC voltage by controlling a ratio of on and off times of a semiconductor switching transistor. Here, the fourth DC voltage can be a voltage of 3.3 [V]. The generated fourth DC voltage is applied to the third circuit part 113.

[0059] Next, the gate driver controls the plurality of switching elements by the third DC voltage. The gate driver can include a first gate driver that controls the plurality of switching elements connected to the high side and a second gate driver that controls the plurality of switching elements connected to the low side. The first gate driver and the second gate driver can generate gate control signals by the third DC voltage, and transmit the gate control signals to the plurality of switching elements included in the first circuit part 111. Accordingly, on-off operations of the plurality of switching elements can be controlled according to the gate control signals.

[0060] The third circuit part 113 can implement a predetermined function using the fourth DC voltage as an input voltage. The third circuit part 113 can control the gate driver included in the second circuit part 112, and communicate with the low voltage circuit unit 130. To this end, the third circuit part 113 can include a processor.

[0061] The processor can control the gate driver by the fourth DC voltage and communicate with the low voltage circuit unit 130. The processor can be a digital signal processor (DSP) implemented as an integrated circuit (IC) chip.

[0062] Figure 4 is a configuration diagram of a low voltage circuit unit according to an embodiment of the present application.

[0063] The low voltage circuit unit 130 according to an embodiment of the present application can include a connector part 131 and a fourth circuit part 132.

[0064] The connector part 131 receives the second DC voltage. The connector part 131 can be connected to an external power source that supplies the second DC voltage by a cable.

[0065] The fourth circuit part 132 communicates with an external device by the second DC voltage. In addition, the fourth circuit part 132 can communicate with the high voltage circuit unit 110. Specifically, the fourth circuit part 132 can communicate with the processor included in the third circuit part 113. To this end, the fourth circuit part 132 can include a communication element. For example, the fourth circuit part 132 can include a communication element such as a controller area network (CAN) communication device or a communication microcomputer.

[0066] Figure 5 is a diagram of an inverter module according to an embodiment of the present application.

[0067] Referring to Figure 5The high-voltage circuit pattern 120 and the low-voltage circuit pattern 140 can be printed on the board. The area of the high-voltage circuit pattern 120 and the area of the low-voltage circuit pattern 140 printed on the board are disposed to be spaced apart from and separated from each other. That is, the high-voltage circuit pattern 120 and the low-voltage circuit pattern 140 can not be electrically connected to each other.

[0068] The first circuit component 111, the second circuit component 112, and the third circuit component 113 included in the high-voltage circuit unit 110 are disposed on the high-voltage circuit pattern 120. Accordingly, the first circuit component 111, the second circuit component 112, and the third circuit component 113 can be electrically connected through the high-voltage circuit pattern 120.

[0069] The connector component 131 and the fourth circuit component 132 included in the low-voltage circuit unit 130 are disposed on the low-voltage circuit pattern 140. Accordingly, the connector component 131 and the fourth circuit component 132 can be electrically connected through the low-voltage circuit pattern 140.

[0070] The arrangement structure of the high-voltage circuit unit 110 will be specifically examined.

[0071] As shown in FIG. 1, Figure 5 The first circuit component 111, the second circuit component 112, and the third circuit component 113 are disposed to be spaced apart from each other. In this case, the separation interval can vary according to the size of the board 101 or the like. The first circuit component 111 can be disposed adjacent to the second circuit component 112, and the second circuit component 112 can be disposed adjacent to the third circuit component 113. The first circuit component 111 can be electrically connected to the second circuit component 112, and the second circuit component 112 can be electrically connected to the third circuit component 113. This electrical connection can be achieved through the high-voltage circuit pattern 120.

[0072] The plurality of elements constituting the second circuit component 112 can be sequentially disposed along the first direction. That is, the second SMPS and the gate driver of the second circuit component 112 can be sequentially disposed along the first direction. Since the elements included in the second circuit component 112 are sequentially disposed along the first direction, the second circuit component 112 can have a shape extending in the first direction. Accordingly, the first direction can be the longitudinal direction of the second circuit component 112 as shown in FIG. 1. Figure 5

[0073] ​Multiple components constituting the third circuit component 113 can be arranged sequentially along the second direction. That is, the processor of the third circuit component 113 and other components to be supplied with a fourth DC voltage can be arranged sequentially along the second direction. Since the components included in the third circuit component 113 are arranged sequentially along the second direction, the third circuit component 113 can have a shape extending in the second direction. Therefore, the second direction can be... Figure 5 The longitudinal direction of the third circuit component 113 shown.

[0074] The first direction and the second direction can form a predetermined angle with each other. For example, such as Figure 5 As shown, the first direction and the second direction can form an angle of 90 degrees to each other. However, the above example and the present invention are not limited thereto. However, a predetermined angle can be designed based on the structure of the inverter module so that one end of the second circuit component 112 and one end of the third circuit component 113 are as far apart as possible. For example, the lower end of the second circuit component 112 and the left end of the third circuit component 113 can be electrically connected to each other so that a third DC voltage can be transmitted. A plurality of elements constituting the third circuit component 113 are arranged from the left end to the right end (i.e., along the second direction), and a plurality of elements arranged sequentially can be arranged to be far away from the second circuit component 112 from the left end to the right end. Therefore, noise coupling (i.e., coupling noise) occurring between the second circuit component 112 and the third circuit component 113 can be minimized.

[0075] Furthermore, connector component 131 is positioned adjacent to and spaced apart from one side of the fourth circuit component 132. In this case, the separation spacing can be set taking into account the size of board 101.

[0076] Please refer to the specific layout of the low-voltage circuit unit 130.

[0077] Figure 6 This is a diagram used to describe the voltage supply flow of an inverter module according to an embodiment of the present invention.

[0078] Figure 6 The arrow shown indicates the direction of current flow.

[0079] Reference Figure 6When the power storage element 111-1 of the high-voltage circuit unit 110 receives a first DC voltage from an external power source, the first DC voltage is applied to each of the first SMPS 111-2 and the switching element 111-3. The switching element 111-3 generates a motor drive voltage through a switch drive and provides the generated motor drive voltage to the motor. Therefore, the switching element 111-3 can be connected to the motor. Furthermore, the first SMPS 111-2 converts the first DC voltage into a third DC voltage and provides the third DC voltage to the second circuit component 112. Therefore, the second circuit component 112 generates a fourth DC voltage from the third DC voltage and provides the fourth DC voltage to the third circuit component 113. In addition, the connector component 131 of the low-voltage circuit unit 130 receives the second DC voltage and then provides the second DC voltage to the fourth circuit component 132. That is, the first circuit component 111, the second circuit component 112, and the third circuit component 113 can be arranged sequentially according to the current direction during inverter driving.

[0080] Check the supply based on DC voltage. Figure 6 As shown in the diagram, since the high-voltage circuit pattern 120, in which the high-voltage circuit unit 110 is disposed, and the low-voltage circuit pattern 140, in which the low-voltage circuit unit 130 is disposed, do not overlap, it can be seen that the currents flowing through the high-voltage circuit unit 110 and the low-voltage circuit unit 130 do not overlap. Therefore, the coupling noise between the current flowing through the low-voltage circuit unit 130 and the current flowing through the high-voltage circuit unit 110 can be significantly reduced.

[0081] Furthermore, it can be seen that the side through which the current flows between the second circuit component 112 and the third circuit component 113, and the opposite side, are configured to have a large gap between them. Therefore, the coupling noise generated between the second circuit component 112 and the third circuit component 113 can be significantly reduced.

[0082] Furthermore, since the connector component 131 and the fourth circuit component 132 are arranged adjacent to each other, the coupling noise generated by current movement can be significantly reduced.

[0083] Furthermore, the inverter module according to an embodiment of the present invention can be disposed in an electric compressor. The electric compressor includes the inverter module according to an embodiment of the present invention and may include a housing, a drive motor, and a compression component. According to an embodiment of the present invention, the electric compressor supplies electricity to the drive motor through the inverter module, the drive motor transmits rotational driving force to the compression component, and the compression component compresses the refrigerant by the rotational driving force.

[0084] The shell forms the outside of the electric compressor. A space in which components can be installed can be formed in the shell. For example, the shell can be implemented in a cylindrical shape having a through-hole in the center thereof, but is not limited thereto. The drive motor can be disposed on one side of the inside of the shell, and the compression part can be disposed on the other side of the inside of the shell.

[0085] The drive motor generates a rotational driving force. The drive motor can include a stator and a rotor. A rotational shaft can be coupled to the rotor. The stator is one of an electromagnet, and can be fixedly installed in the shell by press-fitting. The stator can be formed of a stator core and a coil bundle wound around the stator core, but is not limited thereto. The rotor is installed coaxially with the stator on the inside of the stator. The rotational shaft can be installed to rotate in association with the rotor.

[0086] The compression unit can compress a refrigerant by receiving the rotational driving force of the drive motor. The compression unit can include a fixed scroll and a moving scroll. The fixed scroll is fixedly installed in the compressor shell. The moving scroll can gradually compress a refrigerant compression space formed between the fixed scroll and the moving scroll while rotating together with the rotor in a state of being coupled to a portion of the rotational shaft. That is, the refrigerant introduced into the compression space is compressed by the relative rotation of the fixed scroll and the moving scroll.

[0087] Although the above-described embodiments have been described mainly with reference to the embodiments of the present application, the above are merely exemplary, and it should be understood by those skilled in the art that modifications and applications can be differently performed within the principles of the embodiments. For example, the elements specifically shown in the embodiments can be modified. Furthermore, differences related to modifications and changes should be understood to be included in the scope of the present application defined by the appended claims.

Claims

1. An inverter module comprising: a high-voltage circuit unit configured to generate an inverter control voltage and a motor drive voltage using a first direct current (DC) voltage; a high-voltage circuit pattern configured to electrically connect the high-voltage circuit unit; a low-voltage circuit unit configured to communicate with an external device using a second DC voltage having a smaller amplitude than the first DC voltage; and a low-voltage circuit pattern configured to electrically connect the low-voltage circuit unit, wherein the high-voltage circuit pattern and the low-voltage circuit pattern are disposed apart from each other, wherein the high-voltage circuit unit includes a first circuit part driven by the first DC voltage, a second circuit part driven by a third DC voltage having a smaller amplitude than the first DC voltage, and a third circuit part driven by a fourth DC voltage having a smaller amplitude than the third DC voltage, the first circuit part, the second circuit part, and the third circuit part are disposed on the high-voltage circuit pattern, the first circuit part, the second circuit part, and the third circuit part are sequentially disposed according to a current direction during inverter driving, a plurality of elements constituting the second circuit part are sequentially disposed in a first direction; and a plurality of elements constituting the third circuit part are sequentially disposed in a second direction forming a predetermined angle with the first direction, the plurality of elements constituting the third circuit part are sequentially disposed to become farther apart from the second circuit part along the second direction. 2.The inverter module of claim 1, wherein the high-voltage circuit pattern and the low-voltage circuit pattern are printed on a board, and a region in which the high-voltage circuit pattern is printed and a region in which the low-voltage circuit pattern is printed are separated from each other on the board.

3. The inverter module of claim 1, wherein, the first circuit part includes a first switch mode power supply (SMPS) configured to generate the third DC voltage by the first DC voltage and a plurality of switching elements configured to convert the first DC voltage into the motor drive voltage by switching driving.

4. The inverter module of claim 3, wherein, the second circuit part includes a second SMPS configured to generate the fourth DC voltage by the third DC voltage and a gate driver configured to control the plurality of switching elements by the third DC voltage.

5. The inverter module of claim 4, wherein, the third circuit part includes a processor configured to control the gate driver by the fourth DC voltage and to communicate with the low-voltage circuit unit.

6. The inverter module of claim 1, wherein, the low-voltage circuit unit includes a connector part configured to receive the second DC voltage and a fourth circuit part configured to communicate with the external device by the second DC voltage.

7. The inverter module of claim 6, wherein, the connector part and the fourth circuit part are disposed on the low-voltage circuit pattern.

8. The inverter module of claim 6, wherein, the connector member and the fourth circuit member are disposed apart from each other; and the high-voltage circuit pattern is disposed so as not to cross between the connector member and the fourth circuit member.

9. The inverter module according to claim 1, further comprising a transceiver configured to transmit a signal between the high-voltage circuit unit and the low-voltage circuit unit.

10. The inverter module of claim 9, wherein, the transceiver includes an insulating element configured to insulate the high-voltage circuit unit and the low-voltage circuit unit.

11. An electric compressor comprising the inverter module according to one of claims 1 to 10.

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