Electronic oil pump and printed circuit board thereof

Abstract

Provided in the present invention are an electronic oil pump and a printed circuit board thereof. The printed circuit board used in an electronic oil pump comprises a three-phase inverter circuit with a phase-A transistor, a phase-B transistor and a phase-C transistor, and electric-motor terminal insertion holes for respective phases of a three-phase electric motor, wherein the electric-motor terminal insertion hole for the phases of the three-phase electric motor are each located between the transistors of the corresponding phases of the three-phase inverter circuit. Comparing with an existing printed circuit board used in an electronic oil pump, the printed circuit board used in an electronic oil pump in the embodiments of the present invention can increase the wiring area and heat dissipation area for a power signal on the printed circuit board and reduce the circuit transmission impedance, thereby reducing the heating of the printed circuit board itself and electromagnetic interference exerted by the printed circuit board to the outside.

Description

Electronic oil pump and printed circuit board Technical Field

[0001] The present invention relates to the field of vehicles, and more particularly to an electronic oil pump and a printed circuit board thereof. Background Art

[0002] An electronic oil pump continuously circulates oil in the cooling lines of the transmission, engine, or electric motor, removing heat generated by the transmission, engine, or electric motor and ensuring thermal balance. The performance of the electronic oil pump directly impacts the thermal reliability and performance of the vehicle's engine, transmission, or electric motor.

[0003] Currently, on the printed circuit board (PCB) of an electronic oil pump, the positional relationship between the transistors of each phase of the three-phase inverter circuit and the motor terminal jacks for the corresponding phase of the three-phase motor is arbitrarily set. This can result in spatial overlap between the inverter circuit wiring on different circuit layers of the PCB. When the inverter circuit wiring on different circuit layers of the PCB overlaps, different power signals need to be transmitted on different circuit layers of the PCB. This creates intersecting current paths on the different circuit layers of the PCB, resulting in low energy capacity, poor signal coupling, and poor heat dissipation performance of the PCB. This prevents the PCB from maximizing space utilization with the largest wiring area and reduces the PCB's electromagnetic compatibility.

[0004] Summary of the Invention

[0005] In view of one or more of the above problems, a printed circuit board for use in an electronic oil pump according to an embodiment of the present invention is provided.

[0006] According to an embodiment of the present invention, a printed circuit board used in an electronic oil pump includes a transistor for phase A, a transistor for phase B, and a transistor for phase C of a three-phase inverter circuit, and motor terminal jacks for corresponding phases of a three-phase motor, wherein the motor terminal jack for each phase of the three-phase motor is located between the transistors for the corresponding phase of the three-phase inverter circuit.

[0007] Compared with existing printed circuit boards used in electronic oil pumps, the printed circuit board used in the electronic oil pump according to an embodiment of the present invention can increase the routing area and heat dissipation area of ​​the power signal on the printed circuit board, reduce the line transmission impedance, and thus reduce the heat generation of the printed circuit board itself and external electromagnetic interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The present invention can be better understood from the following description of specific embodiments of the present invention in conjunction with the accompanying drawings, in which:

[0009] FIG1 shows a schematic diagram of an exemplary layout of a printed circuit board used in an electronic oil pump according to an embodiment of the present invention;

[0010] FIG. 2 shows a schematic diagram of a housing for the printed circuit board shown in FIG. 1 . DETAILED DESCRIPTION

[0011] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed in order to provide a comprehensive understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is by no means limited to any specific configuration and algorithm proposed below, but covers any modification, replacement and improvement of elements, components and algorithms without departing from the spirit of the present invention. In the accompanying drawings and the following description, well-known structures and technologies are not shown in order to avoid unnecessary ambiguity in the present invention. In addition, it should be noted that the term "A is connected to B" used herein can mean "A is directly connected to B" or "A is indirectly connected to B via one or more other elements."

[0012] In view of the above situation, an electronic oil pump and a printed circuit board thereof according to an embodiment of the present invention are proposed, which can increase the routing area and heat dissipation area of ​​the power signal on the printed circuit board, thereby reducing the heat generation of the printed circuit board itself and external electromagnetic interference.

[0013] FIG1 illustrates an exemplary layout diagram of a printed circuit board (PCB) used in an electronic oil pump according to an embodiment of the present invention. As shown in FIG1 , PCB 100 includes transistors 102-1A and 102-2A for phase A of a three-phase inverter circuit, transistors 102-1B and 102-2B for phase B, and transistors 102-1C and 102-2C for phase C, as well as motor terminal receptacles 104A, 104B, and 104C for corresponding phases of a three-phase motor. Motor terminal receptacle 104A is located between transistors 102-1A and 102-2A, motor terminal receptacle 104B is located between transistors 102-1B and 102-2B, and motor terminal receptacle 104C is located between transistors 102-1C and 102-2C.

[0014] In printed circuit board 100 shown in FIG1 , because the motor terminal jacks for each phase of a three-phase motor are located between the transistors of the corresponding phase of the three-phase inverter circuit, the same power signal can be transmitted simultaneously on different circuit layers within the same wiring area of ​​printed circuit board 100. This increases the routing area and heat dissipation area for the same power signal, thereby reducing heat generation within printed circuit board 100. Furthermore, transmitting the same power signal across multiple circuit layers reduces line transmission impedance and mitigates external electromagnetic interference from the power signal.

[0015] As shown in FIG1 , in some embodiments, the transistors 102-1A and 102-2A of phase A, the transistors 102-1B and 102-2B of phase B, and the transistors 102-1C and 102-2C of phase C of the three-phase inverter circuit are arranged in order from closer to the power input terminal of the printed circuit board 100 to farther away. In other words, the distances of the bridge arm of phase A (including transistors 102-1A and 102-2A), the bridge arm of phase B (including transistors 102-1B and 102-2B), and the bridge arm of phase C (including transistors 102-1C and 102-2C) of the three-phase inverter circuit from the power input terminal of the printed circuit board 100 increase in order. In this way, the current path from the power input terminal of the printed circuit board 100 to the bridge arms of each phase of the three-phase inverter circuit is shorter. At the same time, the same power signal can be transmitted on different circuit layers in the same wiring area. This can further increase the routing area and heat dissipation area of ​​the same power signal on the printed circuit board 100, reduce the line transmission impedance, and thus further reduce the heat generation of the printed circuit board 100 itself and external electromagnetic interference.

[0016] As shown in FIG1 , in some embodiments, the printed circuit board 100 further includes a storage capacitor 106 , wherein the storage capacitor 106 is located between the power input terminal of the printed circuit board 100 and the transistors 102-1A and 102-2A of phase A of the three-phase inverter circuit. In other words, the storage capacitor 106 is located between the power input terminal of the printed circuit board 100 and the bridge arm of phase A of the three-phase inverter circuit (including transistors 102-1A and 102-2A). This shortens the current path from the power input terminal of the printed circuit board 100 to the bridge arm of phase A of the three-phase inverter circuit. Furthermore, the same power signal can be transmitted between different circuit layers in the same wiring area. This further increases the routing area and heat dissipation area of ​​the same power signal on the printed circuit board 100, reduces the line transmission impedance, and thus further reduces heat generation and external electromagnetic interference of the printed circuit board 100 itself.

[0017] As shown in FIG1 , in some embodiments, the printed circuit board 100 further includes an energy storage capacitor 106 and a filter inductor 108 . Both the energy storage capacitor 106 and the filter inductor 108 are located between the power input terminal of the printed circuit board 100 and the transistors 102-1A and 102-2A of phase A of the three-phase inverter circuit (i.e., between the power input terminal of the printed circuit board 100 and the bridge arm of phase A of the three-phase inverter circuit). The energy storage capacitor 106 is located farther from the power input terminal of the printed circuit board 100 and closer to the bridge arm of phase A of the three-phase inverter circuit than the filter inductor 108. In other words, the energy storage capacitor 106 and the filter inductor 108 are arranged between the power input terminal of the printed circuit board 100 and the bridge arm of phase A of the three-phase inverter circuit in the order of filter inductor 108 -> energy storage capacitor 106 . In this way, the current path from the power input terminal of the printed circuit board 100 to the bridge arm of phase A of the three-phase inverter circuit is shorter, and the same power signal can be transmitted on different circuit layers in the same wiring area. This can further increase the routing area and heat dissipation area of ​​the same power signal on the printed circuit board 100, reduce the line transmission impedance, and thus further reduce the heat generation of the printed circuit board 100 itself and external electromagnetic interference.

[0018] As shown in FIG1 , in some embodiments, the printed circuit board 100 further includes an energy storage capacitor 106, a filter inductor 108, and an anti-reverse transistor 110, wherein the energy storage capacitor 106, the filter inductor 108, and the anti-reverse transistor 110 are all located between the power input terminal of the printed circuit board 100 and the transistors 102-1A and 102-2A of the phase A of the three-phase inverter circuit (i.e., located between the power input terminal of the printed circuit board 100 and the bridge arm of the phase A of the three-phase inverter circuit). The energy storage capacitor 106 is farther from the power input terminal of the printed circuit board 100 and closer to the bridge arm of the phase A of the three-phase inverter circuit than the filter inductor 108. The filter inductor 108 is farther from the power input terminal of the printed circuit board 100 and closer to the bridge arm of the phase A of the three-phase inverter circuit than the anti-reverse transistor 110. That is, the energy storage capacitor 106, the filter inductor 108, and the anti-flyback transistor 110 are arranged between the power input terminal of the printed circuit board 100 and the bridge arm of the A phase of the three-phase inverter circuit in the order of anti-flyback transistor 110 -> filter inductor 108 -> energy storage capacitor 106. This shortens the current path from the power input terminal of the printed circuit board 100 to the bridge arm of the A phase of the three-phase inverter circuit. Simultaneously, the same power signal can be transmitted between different circuit layers in the same wiring area. This further increases the routing area and heat dissipation area of ​​the same power signal on the printed circuit board 100, reduces line transmission impedance, and thus further reduces heat generation and external electromagnetic interference of the printed circuit board 100 itself.

[0019] As can be seen from Figures 1 and 2 , one side of the printed circuit board 100 can be covered by the housing 200 shown in Figure 1 , and the other side can be covered by the housing 300 shown in Figure 2 . The housings 200 and 300 can be used together to protect and dissipate heat for the printed circuit board 100. Typically, the printed circuit board 100 needs to be placed in the housings 200 and 300 before it can be used in an electronic oil pump.

[0020] The present invention may be implemented in other specific forms without departing from its spirit and essential characteristics. For example, the algorithms described in the specific embodiments may be modified without departing from the basic spirit of the present invention. Therefore, the present embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the invention is defined by the appended claims rather than the foregoing description, and all modifications coming within the meaning and scope of equivalents of the claims are intended to be included within the scope of the present invention.

Claims

1. A printed circuit board for an electronic oil pump, comprising a transistor for phase A, a transistor for phase B, a transistor for phase C of a three-phase inverter circuit, and motor terminal jacks for corresponding phases of a three-phase motor, wherein: A motor terminal receptacle for each phase of the three-phase motor is located between transistors of a corresponding phase of the three-phase inverter circuit.

2. The printed circuit board for use in an electronic oil pump according to claim 1, wherein: The transistors of the A phase, the B phase, and the C phase of the three-phase inverter circuit are arranged in order from a position closer to the power input terminal of the printed circuit board to a position farther away.

3. The printed circuit board used in the electronic oil pump according to claim 1 or 2, further comprising an energy storage capacitor, wherein: The energy storage capacitor is located between the power input terminal of the printed circuit board and the transistor of phase A of the three-phase inverter circuit.

4. The printed circuit board used in the electronic oil pump according to claim 1 or 2, further comprising an energy storage capacitor and a filter inductor, wherein: The energy storage capacitor and the filter inductor are both located between the power input terminal of the printed circuit board and the transistor of phase A of the three-phase inverter circuit, and the energy storage capacitor is farther from the power input terminal of the printed circuit board and closer to the transistor of phase A of the three-phase inverter circuit than the filter inductor.

5. The printed circuit board used in the electronic oil pump according to claim 1 or 2, further comprising an energy storage capacitor, a filter inductor, and an anti-reverse transistor, wherein: The energy storage capacitor, the filter inductor, and the anti-reverse transistor are all located between the power input terminal of the printed circuit board and the transistor of phase A of the three-phase inverter circuit. The energy storage capacitor is farther from the power input terminal of the printed circuit board and closer to the transistor of phase A of the three-phase inverter circuit than the filter inductor. The filter inductor is farther from the power input terminal of the printed circuit board and closer to the transistor of phase A of the three-phase inverter circuit than the anti-reverse transistor. 6 . An electronic oil pump comprising the printed circuit board for use in the electronic oil pump according to claim 1 , and a housing for protecting and dissipating heat from the printed circuit board.

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