WO2023058722A1 - Motor driving circuit board, motor, and pump device - Google Patents

Motor driving circuit board, motor, and pump device Download PDF

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Publication number
WO2023058722A1
WO2023058722A1 PCT/JP2022/037467 JP2022037467W WO2023058722A1 WO 2023058722 A1 WO2023058722 A1 WO 2023058722A1 JP 2022037467 W JP2022037467 W JP 2022037467W WO 2023058722 A1 WO2023058722 A1 WO 2023058722A1
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WO
WIPO (PCT)
Prior art keywords
motor
region
board
circuit board
drive circuit
Prior art date
Application number
PCT/JP2022/037467
Other languages
French (fr)
Japanese (ja)
Inventor
敏 谷邑
Original Assignee
日本電産サンキョー株式会社
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Filing date
Publication date
Application filed by 日本電産サンキョー株式会社 filed Critical 日本電産サンキョー株式会社
Publication of WO2023058722A1 publication Critical patent/WO2023058722A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/02—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for suppression of electromagnetic interference
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/40—Structural association with grounding devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P31/00—Arrangements for regulating or controlling electric motors not provided for in groups H02P1/00 - H02P5/00, H02P7/00 or H02P21/00 - H02P29/00
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/46—Manufacturing multilayer circuits

Definitions

  • the present invention relates to a motor drive circuit board, a motor, and a pump device.
  • a motor drive circuit is provided with a signal system circuit including a control circuit and a power system circuit including a switching element that outputs a drive current.
  • a signal system circuit including a control circuit and a power system circuit including a switching element that outputs a drive current.
  • the signal system circuit and the power system circuit are provided on separate substrates in consideration of routing of wiring patterns (see Patent Document 1).
  • EMC Electromagnetic Compatibility
  • EMI Electromagnetic Interference
  • emission a phenomenon in which electromagnetic energy is emitted
  • EMS Electromagnetic Susceptibility
  • immunity the ability to operate without performance deterioration or malfunction due to external electromagnetic energy.
  • an object of the present invention is to provide a circuit board for driving a motor, a motor, and a pump that have excellent electromagnetic characteristics even when signal circuits and power circuits are mounted on a single board. It is to provide a device.
  • a signal system circuit including a motor control unit and a power system circuit including a switching element that outputs a drive current are provided on a multilayer substrate having a plurality of layers.
  • the ground pattern for the power system circuit and the ground pattern for the signal system circuit are integrated as a common ground pattern, and the common ground pattern is one of the plurality of layers. and a first conductive layer occupying an area of 75% or more of the substrate area in at least one layer.
  • the board since the board consists of a multilayer board, there is a high degree of freedom in designing the position of wiring in multiple layers. Therefore, ground patterns can be arranged in a wide range. Further, the ground pattern includes a common ground pattern composed of a first conductive layer electrically connected to both the signal system circuit and the power system circuit. Compared to the case where a ground pattern connected to each is provided, it is possible to continuously and integrally provide a wide range. Therefore, even when the drive circuit 150 is provided on one substrate, the EMC performance is excellent.
  • the common ground pattern includes a second conductive layer occupying an area of 40% or more of the substrate area in a layer different from the layer provided with the first conductive layer among the plurality of layers. .
  • a plurality of terminal holes into which connector terminals are fitted are arranged in a first area on one side with respect to the center of the multi-layer board along the edges of the board.
  • the switching element is arranged in a second region on the side opposite to the terminal with respect to the center of the, the motor control unit is arranged between the first region and the second region, the first region, the It is possible to employ a mode in which an electric element for noise countermeasures is mounted in a region in a direction intersecting a virtual line linearly extending through the center and the second region.
  • Another aspect of the present invention is a motor drive circuit board provided with a signal system circuit including a motor control unit and a power system circuit including a switching element for outputting a drive current, wherein the board has a center of the board.
  • a plurality of terminal holes into which connector terminals are fitted are arranged along the edge of the substrate in a first region on one side of the substrate, and a second region on the opposite side of the center of the substrate to the terminals. and the motor control unit is disposed between the first region and the second region, extending linearly through the first region, the center, and the second region.
  • a noise countermeasure electric element is mounted in a region in a direction intersecting the imaginary line.
  • the EMC performance is excellent. Further, when providing the noise countermeasure electric element, since the electric elements other than the noise countermeasure electric element are collectively arranged in the first area and the second area, it is possible to secure a space for arranging the noise countermeasure electric element. . Therefore, even when the drive circuit is provided on one substrate, the EMC performance is excellent.
  • the substrate is a single-sided substrate.
  • the substrate is a double-sided mounting substrate, and the electric element for the power circuit is mounted on one side of the double-sided mounting board, and the noise countermeasure electric element is mounted on the other side of the double-sided mounting board. Any aspect can be adopted.
  • the motor drive circuit board to which the present invention is applied is used for a motor
  • the motor is provided with a coil to which drive current output from the motor drive circuit board is supplied.
  • the pump device When a motor to which the present invention is applied is used in a pump device, the pump device has an impeller that is rotationally driven by the motor.
  • the substrate is a multi-layer substrate, there is a high degree of freedom in designing the position of wiring in multiple layers. Therefore, ground patterns can be arranged in a wide range. Further, the ground pattern includes a common ground pattern composed of a first conductive layer electrically connected to both the signal system circuit and the power system circuit. Compared to the case where a ground pattern connected to each is provided, it is possible to continuously and integrally provide a wide range. Therefore, even when the drive circuit 150 is provided on one substrate, the EMC performance is excellent.
  • the electrical element for noise countermeasures is provided, so the EMC performance is excellent. Further, when providing the noise countermeasure electric element, since the electric elements other than the noise countermeasure electric element are collectively arranged in the first area and the second area, it is possible to secure a space for arranging the noise countermeasure electric element. . Therefore, even when the drive circuit is provided on one substrate, the EMC performance is excellent.
  • FIG. 2 is a longitudinal sectional view of the pump device and motor shown in FIG. 1;
  • FIG. 2 is an exploded perspective view showing a state in which a cover is removed from the pump device shown in FIG. 1;
  • FIG. 4 is an explanatory diagram of a drive circuit of the motor drive circuit board shown in FIG. 3;
  • FIG. 4 is an explanatory view schematically showing a planar configuration of the motor drive circuit board shown in FIG. 3;
  • FIG. 4 is an explanatory diagram of a ground pattern of the motor drive circuit board shown in FIG. 3;
  • FIG. 4 is an explanatory diagram of a motor drive circuit board according to Embodiment 2 of the present invention;
  • FIG. 5 is an explanatory view schematically showing a planar configuration of a motor driving circuit board according to Embodiment 2 of the present invention
  • FIG. 5 is an explanatory view schematically showing a planar configuration of a motor drive circuit board according to Embodiment 4 of the present invention
  • a motor drive circuit board 19, a motor 10, and a pump device 1 according to an embodiment of the present invention will be described below with reference to the drawings.
  • the direction of the motor axis L means the direction in which the motor axis L extends
  • the radial inner and outer radial directions refer to the radial directions centered on the motor axis L.
  • the circumferential direction means the direction of rotation about the motor axis L.
  • FIG. 1 is a perspective view showing one aspect of a pump device 1 and a motor 10 to which the present invention is applied.
  • FIG. 2 is a longitudinal sectional view of pump device 1 and motor 10 shown in FIG.
  • FIG. 3 is an exploded perspective view of the pump device shown in FIG. 1 with the cover 18 removed.
  • the pump device 1 includes a case 2 having a suction pipe 21 and a discharge pipe 22, a motor 10 arranged on one side L1 of the case 2 in the direction of the motor axis L,
  • the impeller 25 is arranged in the internal pump chamber 20 , and the impeller 25 is rotationally driven around the motor axis L by the motor 10 .
  • the motor 10 includes a cylindrical stator 3, a rotor 4 arranged inside the stator 3, a resin housing 6 that covers the stator 3, and a support shaft 5 that rotatably supports the rotor 4. .
  • the stator 3 has a stator core 31, insulators 32 and 33 held by the stator core 31, and a coil 35 wound around the stator core 31 via the insulators 32 and 33.
  • the stator core 31 includes an annular portion 311 extending in an annular shape and a plurality of salient poles 312 protruding radially inward from the annular portion 311 .
  • Each of the insulators 32 and 33 overlaps the stator core 31 from both sides in the direction of the motor axis L and covers each of the plurality of salient poles 312 .
  • the coil 35 is wound around the salient pole 312 via insulators 32 and 33 .
  • Motor 10 is a three-phase motor.
  • the rotor 4 has a cylindrical portion 40 extending in the direction of the motor axis L.
  • a cylindrical magnet 47 is held on the outer peripheral surface of the cylindrical portion 40 so as to face the stator 3 radially inwardly.
  • a disk-shaped flange portion 45 is formed at the end of the cylindrical portion 40 on the other side L2 in the direction of the motor axis L, and the disk 26 is connected to the flange portion 45 from the other side L2 in the direction of the motor axis L. ing.
  • a plurality of blade portions 261 are formed at equal angular intervals on the surface of the disk 26 facing the flange portion 45 , and the disk 26 is fixed to the flange portion 45 via the blade portions 261 . Therefore, the impeller 25 connected to the cylindrical portion 40 of the rotor 4 is configured by the flange portion 45 and the disc 26 .
  • a cylindrical radial bearing 11 is held inside the cylindrical portion 40 in the radial direction of the rotor 4 , and the rotor 4 is rotatably supported by the support shaft 5 via the radial bearing 11 .
  • An end portion 51 on one side L1 of the support shaft 5 in the direction of the motor axis L is non-rotatably held by the bottom wall 63 of the housing 6 .
  • the case 2 includes a tubular portion 28 and a support portion 27 that supports the tubular portion 28.
  • An end portion 52 of the support shaft 5 on the other side L2 in the direction of the motor axis L is thrust to the tubular portion 28 of the case 2. It is supported via bearings 12 .
  • the housing 6 is a resin sealing member 60 that covers the stator 3 from both radial sides and both sides in the motor axis L direction. Accordingly, the housing 6 includes a first partition wall portion 61 forming a part of the wall surface of the pump chamber 20, a second partition wall portion 62 interposed between the stator 3 and the magnet 47, and the stator 3 from the outside in the radial direction. and a covering cylindrical body 66 .
  • FIG. 3 is an exploded perspective view showing a state in which the cover 18 is removed from the pump device 1 shown in FIG. 1.
  • FIG. 3 the direction of the motor axis L is vertically inverted with respect to FIGS. 1 and 2, and one side L1 of the direction of the motor axis L is the upper side of the drawing.
  • the cover 18 is fixed from one side L1 of the motor axis L direction to the end portion 64 of the housing 6 on the one side L1 of the motor axis L direction.
  • the motor drive circuit board 19 provided with a circuit for controlling power supply to the coil 35 and the like is arranged.
  • the motor drive circuit board 19 is fixed to the housing 6 by screws 91 and 92 which are tapping screws passing through the notches 197 and 198 . Further, the motor drive circuit board 19 is positioned in the circumferential direction by the protrusion 645 and the notch 199 of the housing 6 .
  • a plurality of metal winding terminals 71 protruding from the stator 3 through the bottom wall 63 of the housing 6 to one side L1 in the direction of the motor axis L are fitted and soldered to the motor drive circuit board 19.
  • terminal holes 190 are provided.
  • a total of four winding terminals 71 protrude from four terminal holes 190 .
  • Each of the three winding terminals 71 out of the four winding terminals 71 is connected to one end of the winding constituting the three coils 35 connected in series.
  • the remaining one winding terminal 71 is a common (C) terminal to which the other end of the winding is electrically connected.
  • the motor drive circuit board 19 is provided with a plurality of terminal holes 195 in which metal connector terminals 75 held by the housing 6 are fitted and soldered. Therefore, the motor drive circuit board 19 is formed with wirings and the like for electrically connecting the drive circuit and the like provided on the motor drive circuit board 19 to the winding terminals 71 and the connector terminals 75 .
  • a tubular connector housing 69 is formed in the housing 6 , and the ends of the connector terminals 75 are positioned inside the connector housing 69 . Therefore, when a signal or the like is supplied by connecting a connector to the connector housing 69 , the signal is input to the drive circuit through the connector terminal 75 , and as a result, the drive current generated by the drive circuit flows through the winding terminal 71 . It is supplied to each coil 35 . As a result, the rotor 4 rotates around the motor axis L. As a result, the impeller 25 rotates in the pump chamber 20 and the pressure inside the pump chamber 20 becomes negative, so that the fluid is sucked into the pump chamber 20 from the suction pipe 21 and discharged from the discharge pipe 22 .
  • FIG. 4 is an explanatory diagram of the drive circuit 150 of the motor drive circuit board 19 shown in FIG. FIG. 4 shows a schematic configuration of the drive circuit 150.
  • the three-phase coil 35 may be described with U, V, and W indicating each phase. It will be described as a coil 35 without attaching W.
  • the motor drive circuit board 19 shown in FIG. 3 includes a board 110 and a drive circuit 150 shown in FIG.
  • the drive circuit 150 supplies drive currents to the three-phase coils 35 based on the output signals from the motor control unit 161 that controls the rotation of the motor 10 by PWM signals and the motor control unit 161.
  • It comprises a power system circuit 170 consisting of an inverter, a drive voltage line 135 for supplying a drive voltage to the power system circuit 170, and a common line 140 connected to neutral points 165 of three-phase coils 35U, 35V, and 35W.
  • the drive voltage line 135 supplies a rated voltage of 12V to the motor control section 161 and the power system circuit 170 .
  • the drive circuit 150 also includes a control signal line 115 for inputting a PWM signal from an external device to the motor control unit 161, and an FG output for transmitting a rotational speed signal corresponding to the rotational speed of the motor 10 to the external device. line 116;
  • the motor drive circuit board 19 has four connector terminals 75 consisting of a constant voltage terminal 751, a first signal terminal 752, a second signal terminal 753, and a ground terminal 754, which will be described below.
  • the constant voltage terminal 751 is electrically connected to the driving voltage line 135, the first signal terminal 752 is electrically connected to the control signal line 115, and the second signal terminal 753 is electrically connected to the FG output line 116.
  • the ground terminal 754 is electrically connected to the ground pattern 100 of the motor drive circuit board 19 .
  • the drive voltage line 135 supplies electric power to the motor control section 161 via the first line 136 and the second line 137 .
  • a capacitor 127 is electrically connected between the drive voltage line 135 and the ground pattern 100 .
  • the first line 136 and the second line 137 are branched after the connecting position of the capacitor 127 , and the electrolytic capacitor 128 is connected between the first line 136 and the ground pattern 100 .
  • the second line 137 is electrically connected to the motor control section 161 via the resistor R32.
  • capacitors 122 and 123 are electrically connected in series.
  • a common line 140 is electrically connected between the capacitors 122 and 123 , and a ground terminal 754 to which a ground potential is applied is electrically connected between the capacitor 123 and the ground pattern 100 .
  • the control signal line 115 is electrically connected to the first signal terminal 752 and transmits the PWM signal from the external device to the motor control section 161 .
  • a resistor R3 is electrically connected in series to the control signal line 115 .
  • the control signal line 115 is electrically connected to the ground pattern 100 via the capacitor 124 between the resistor R3 and the motor controller 161 .
  • the first signal terminal 752 and the resistor R3 of the control signal line 115 are electrically connected to the ground pattern 100 via the capacitor 126.
  • the connection position of the capacitor 126 and the resistor R3 Between is electrically connected to the first line 136 via the third line 151 .
  • a resistor R2 is electrically connected in series to the third line 151 .
  • the FG output line 116 transmits the rotation speed signal of the motor 10 output from the motor control unit 161 to an external device.
  • a capacitor 125, a resistor R1, and a NOT gate Q7 are connected to the FG output line 116.
  • FIG. Capacitor 125 is electrically connected between FG output line 116 and ground pattern 100 .
  • the resistor R1 is electrically connected in series to the FG output line 116 between the connection position of the capacitor 125 and the motor control section 161 .
  • the NOT gate Q7 is electrically connected in series to the FG output line 116 between the resistor R1 and the motor control section 161.
  • the motor control unit 161 is composed of an IC chip or the like arranged on the motor drive circuit board 19 . Motor control unit 161 outputs an output signal for controlling power system circuit 170 based on a PWM signal input from an external device. Also, the motor control unit 161 outputs a rotational speed signal corresponding to the rotational speed of the rotor 4 to an external device. Based on the rotation speed signal, the external device outputs a PWM signal to the motor control unit 161 in order to set the motor 10 to a desired rotation speed.
  • the power system circuit 170 includes U-phase coil switching elements Q1 and Q2, V-phase coil switching elements Q3 and Q4, and W-phase coil switching elements Q5 and Q6.
  • MOSFETs for example, are used for the switching elements Q1 to Q6.
  • the drains of the switching elements Q1, Q3 and Q5 are connected to the driving voltage line 135, and the sources of the switching elements Q2, Q4 and Q6 are connected to the ground pattern 100 via the shunt resistor Rs. Both ends of the shunt resistor Rs are connected to the motor control section 161 via output lines 141 and 142 .
  • Resistors R33 and R34 are electrically connected in series to the output lines 141 and 142, respectively.
  • a capacitor 151 is connected between the source of switching element Q1 and the drain of switching element Q2, a capacitor 152 is connected between the source of switching element Q3 and the drain of switching element Q4, and the source of switching element Q5 and the drain of switching element Q6 are connected.
  • a capacitor 153 is connected to the drain.
  • Capacitors 151 to 153 serve as charge/discharge capacitors for the bootstrap circuit.
  • Bootstrap diodes D31 to D33 are connected between the capacitors 151 to 153 and the motor controller 161, respectively. Diodes D31 to D33 are connected to motor control section 161 via resistor R31.
  • Resistors R11 to R16 are connected between the gates and sources of the switching elements Q1 to Q6, respectively.
  • Resistors R21 to R26 are connected between the gates of the switching elements Q1 to Q6 and the motor control section 161, respectively.
  • Filters 141-146 are connected between the drains and sources of the switching elements Q1-Q6, respectively.
  • the filters 141-146 are composed of series-connected resistors and capacitors.
  • the switching elements Q1 to Q6 are switched based on the output signal output from the motor control section 161 to supply the coil 35 with a three-phase AC drive current.
  • FIG. 5 is an explanatory diagram schematically showing a planar configuration of the motor drive circuit board 19 shown in FIG.
  • FIG. 6 is an explanatory diagram of the ground pattern 100 of the motor drive circuit board 19 shown in FIG.
  • the drive circuit shown in FIG. 4 is configured, for example, on the substrate 110 shown in FIG.
  • Substrate 110 is a multi-layer substrate 110A having multiple layers.
  • a plurality of insulating layers laminated on the substrate body constitute a plurality of layers in which conductive layers such as wiring and electrodes are arranged, and the conductive layers formed in different layers pass through the insulating layers. They are electrically connected by contact holes.
  • Conductive layers such as wiring and electrodes are made of copper layers.
  • a plurality of terminal holes 195 into which the connector terminals 75 are fitted are arranged along the edges of the multilayer substrate 110A in the first region 101 on one side with respect to the center O of the multilayer substrate 110A. are placed.
  • the four terminal holes 195 are the first terminal hole 191 and the second terminal hole 191 into which the constant voltage terminal 751, the first signal terminal 752, the second signal terminal 753, and the ground terminal 754 shown in FIG. It consists of a terminal hole 192 , a third terminal hole 193 and a fourth terminal hole 194 .
  • the first terminal hole 191 corresponds to the constant voltage terminal 751
  • the second terminal hole 192 corresponds to the first signal terminal 752
  • the third terminal hole 193 corresponds to the second signal terminal 753
  • the second terminal hole 193 corresponds to the second signal terminal 753.
  • the 4-terminal hole 194 corresponds to the ground terminal 754 . Therefore, among the plurality of terminal holes 195, the first terminal holes 191 and the fourth terminal holes 194 on both sides correspond to constant voltage.
  • the switching elements Q1 to Q6 are mounted in the second region 102 on the side opposite to the first region 101 with respect to the center O.
  • a motor control unit 161 is provided between the first area 101 and the second area 102 .
  • a virtual line P extending linearly through the first region 101, the center O, and the second region 102 is defined as the center line, and two regions positioned on both sides in a direction intersecting the virtual line P are the third regions.
  • a plurality of terminal holes 190 in which the winding terminals 71 are fitted are arranged in the first region 101 and the third region 103 along the edges of the multilayer substrate 110A.
  • the electrolytic capacitor 128 shown in FIG. 4 is provided, the electrolytic capacitor 128 is arranged in the third region 103 .
  • the circuit including the motor control unit 161 is a relatively low voltage signal system circuit 160, and the circuit including the switching elements Q1 to Q6 for outputting the drive current is a relatively high voltage power system circuit.
  • the circuit 170 in this embodiment, as will be described below with reference to FIG. It is included.
  • the multilayer board 110A has four layers 111, 112, 113 and 114 shown in FIG.
  • the side layer 111 is formed with lands (not shown) on which the electric elements shown in FIG. 4 are mounted.
  • At least one of the four layers 111, 112, 113, and 114 of the multilayer board 110A includes a first conductive layer 106 occupying an area of 75% or more of the board area, and a signal circuit 160 and a power circuit. 170 are configured as a common ground pattern 100c electrically connected to both.
  • the common ground pattern 100 c functions both as the ground pattern 100 for the signal system circuit 160 and as the ground pattern 100 for the power system circuit 170 .
  • the second layer 112 from the upper layer side extends over the first region 101, the second region 102, the third region 103, and the fourth region 104.
  • a first conductive layer 106 is formed.
  • the first conductive layer 106 does not exist in the contact holes, the wiring, around the contact holes, and around the wiring, but the first conductive layer 106 has an area of 75% or more of the substrate area. , forming a continuous common ground pattern 100c.
  • the third layer 113 and the fourth layer 114 from the upper layer side include part of the third region 103, part of the fourth region 104, and a second conductive layer 107 extending over the first region 101 .
  • the first conductive layer 106 does not exist in the contact holes, wirings, around the contact holes, and around the wirings, but the second conductive layer 107 has an area of 40% or more of the substrate area. , forming a continuous common ground pattern 100c.
  • the board 110 is made of the multilayer board 110A, so that there is a high degree of freedom in designing the positions of the wirings in a plurality of layers. Therefore, the ground pattern 100 can be arranged over a wide range.
  • the ground pattern 100 includes a common ground pattern 100c composed of a first conductive layer 106 electrically connected to both the signal system circuit 160 and the power system circuit 170.
  • the common ground pattern 100c is used for the signal system Compared to the case where a ground pattern connected to each of the circuit 160 and the power system circuit 170 is provided, it can be provided continuously and integrally over a wide range. More specifically, it is possible to provide a common ground pattern 100c composed of the first conductive layer 106 that is continuous over a wide area that occupies 75% or more of the substrate area. Therefore, even when the drive circuit 150 is provided on one substrate 110, the EMC performance is excellent.
  • the ground pattern 100 includes a common ground pattern 100c composed of the second conductive layer 107 electrically connected to both the signal system circuit 160 and the power system circuit 170.
  • the common ground pattern 100c composed of the second conductive layer 107 is continuous over a wide range that occupies 40% or more of the substrate area. Therefore, even when the drive circuit 150 is provided on one substrate 110, the EMC performance is excellent.
  • the first terminal hole 191 and the fourth terminal hole 194 on both sides correspond to a constant voltage, so that the wires extending from the first terminal hole 191 and the fourth terminal hole 194 are arranged. can be used as shield wiring.
  • FIG. 7 is an explanatory diagram of the motor drive circuit board 19 according to Embodiment 2 of the present invention.
  • FIG. 7 shows a schematic configuration of the drive circuit 150.
  • FIG. 8 is an explanatory view schematically showing a planar configuration of the motor drive circuit board 19 according to Embodiment 2 of the present invention. Since the basic configuration of this embodiment is the same as that of the first embodiment, common parts are denoted by the same reference numerals and descriptions thereof are omitted.
  • the drive circuit 150 is provided with noise countermeasure electric elements 180 such as an inductor 118, an electrolytic capacitor 121, and a diode 131.
  • FIG. 1 noise countermeasure electric elements 180 such as an inductor 118, an electrolytic capacitor 121, and a diode 131.
  • Ferrite beads 119 may also be provided as electrical elements 180 for noise countermeasures.
  • Electrolytic capacitor 121 has a capacitance of 150 ⁇ F.
  • Inductor 118 is electrically connected in series to drive voltage line 135 , and electrolytic capacitor 121 and diode 131 are each arranged between drive voltage line 135 and ground pattern 100 .
  • ferrite bead 119 and capacitor 126 are provided, ferrite bead 119 is electrically connected to control signal line 115 between the connection position of capacitor 126 and the branch position of third line 151 .
  • the board 110 is the multilayer board 110A, and the common ground pattern 100c described in the first embodiment is provided, as in the first embodiment.
  • a plurality of terminal holes 195 into which the connector terminals 75 are fitted are formed along the edge of the multilayer substrate 110A in the first region 101 on one side with respect to the center O of the multilayer substrate 110A.
  • Switching elements Q1 to Q6 are mounted in a second region 102 opposite to the first region 101 with respect to the center O.
  • the first terminal hole 191 corresponds to the constant voltage terminal 751 and the fourth terminal hole 194 corresponds to the ground terminal 754 . Therefore, among the plurality of terminal holes 195, the first terminal holes 191 and the fourth terminal holes 194 on both sides correspond to constant voltage.
  • a motor control unit 161 is provided between the first area 101 and the second area 102 .
  • a virtual line P extending linearly through the first region 101, the center O, and the second region 102 is defined as the center line, and two regions positioned on both sides in a direction intersecting the virtual line P are the third regions.
  • a plurality of terminal holes 190 in which the winding terminals 71 are fitted are arranged in the first region 101 and the third region 103 along the edges of the multilayer substrate 110A.
  • An electrolytic capacitor 128 is arranged in the third region 103 .
  • noise countermeasure electric elements 180 such as the electrolytic capacitor 121, the inductor 118, the diode 131, and the ferrite bead 119 are arranged in the fourth region 104. .
  • the electrical element 180 for noise countermeasures is provided in addition to the common ground pattern 100c, so that the EMC performance is excellent.
  • the noise countermeasure electric element 180 since the electric elements other than the noise countermeasure electric element 180 are collectively arranged in the first region 101, the second region 102, and the third region 103, the fourth region 104 is It can be used as an arrangement space for the electrical element 180 for noise countermeasures. Therefore, even when the drive circuit 150 is provided on one substrate 110, the EMC performance is excellent.
  • the noise countermeasure electric element 180 can be arranged near the first terminal hole 191 corresponding to the constant voltage (power supply), thereby improving the EMC performance.
  • the inductor 118 can be arranged near the first terminal hole 191 corresponding to the constant voltage to particularly improve the EMC performance.
  • the noise countermeasure electric element 180 is provided for the motor drive circuit board 19 provided with the common ground pattern 100c described in the first embodiment.
  • the motor drive circuit board 19 including the multilayer board 110A without the common ground pattern 100c using the fourth region 104, the inductor 118, the electrolytic capacitor 121, the diode 131, and the A noise countermeasure electric element 180 such as a ferrite bead 119 may be provided.
  • the substrate 110 is a multilayer single-sided substrate, but the present invention may be applied to a case where the substrate 110 is a single-layer single-sided substrate.
  • FIG. 9 is an explanatory view schematically showing the planar configuration of the motor drive circuit board 19 according to Embodiment 4 of the present invention.
  • FIG. 9 shows the layout (a) of the electrical elements on the first surface 110B1 of the double-sided mounting board 110B used for the motor driving circuit board 19, and the second surface of the double-sided mounting board 110B used for the motor driving circuit board 19.
  • Layout (b) of the electrical elements in 110B2 is shown. It should be noted that layouts (a) and (b) shown in FIGS.
  • the board 110 is a double-sided mounting board 110B.
  • a plurality of terminal holes 195 into which the connector terminals 75 are fitted are arranged in the first area 101 on one side with respect to the center O along the edges of the double-sided mounting board 110B.
  • the switching elements Q1 to Q6 are mounted in the second area 102 on the side opposite to the first area 101 with respect to the center O.
  • a motor control unit 161 is provided between the first area 101 and the second area 102 .
  • the first terminal hole 191 corresponds to the constant voltage terminal 751 and the fourth terminal hole 194 corresponds to the ground terminal 754 . Therefore, among the plurality of terminal holes 195, the first terminal holes 191 and the fourth terminal holes 194 on both sides correspond to constant voltage.
  • a virtual line P extending linearly through the first region 101, the center O, and the second region 102 is defined as the center line, and two regions located on both sides of the direction intersecting the virtual line P are defined as the center line.
  • the winding terminal 71 is provided between the end of the first region 101 on the third region 103 side and the end of the first region 101 on the fourth region 104 side.
  • a plurality of terminal holes 190 for fitting are arranged along the edges of the double-sided mounting board 110B.
  • an electrolytic capacitor 128 may be arranged in the third region 103 .
  • noise countermeasure electric elements 180 such as the electrolytic capacitor 121, the inductor 118, the diode 131, and the ferrite bead 119 are arranged in the fourth region 104. .
  • the electrical elements other than the noise countermeasure electrical element 180 are collectively arranged in the first area 101, the second area 102, and the third area 103, so that the fourth area 104 is arranged. It can be used as an arrangement space for the electrical element 180 for noise countermeasures. Therefore, even when the drive circuit 150 is provided on one substrate 110, the EMC performance is excellent.

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Abstract

Provided are: a motor driving circuit board which exhibits excellent electromagnetic properties even when a signal system circuit and a power system circuit are mounted on a single substrate; a motor; and a pump device.　In a motor driving circuit board 19, a ground pattern 100 is provided with, at a layer 112 of a multilayer substrate 110A, a common ground pattern 100c composed of a first conductive layer 106 that is electrically connected to both the signal system circuit and the power system circuit. The first conductive layer 106 is continuous over a wide range occupying 75% or more of the substrate area. Further, the ground pattern 100 is provided with, at layers 113, 114 of the multilayer substrate 110A, a common ground pattern 100c composed of a second conductive layer 107 that is electrically connected to both the signal system circuit and the power system circuit. The second conductive layer 107 is continuous over a wide range occupying 40% or more of the substrate area.

Description

モータ駆動用回路基板、モータおよびポンプ装置Circuit boards for motor drives, motors and pump devices
　本発明は、モータ駆動用回路基板、モータおよびポンプ装置に関するものである。 The present invention relates to a motor drive circuit board, a motor, and a pump device.
　モータの駆動回路には、制御回路を含む信号系回路と、駆動電流を出力するスイッチング素子を含むパワー系回路とが設けられている。かかる駆動回路において、配線パターンの引き回し等を考慮して、信号系回路およびパワー系回路を別の基板に設けた態様が提案されている（特許文献１参照）。 A motor drive circuit is provided with a signal system circuit including a control circuit and a power system circuit including a switching element that outputs a drive current. In such a drive circuit, there has been proposed a mode in which the signal system circuit and the power system circuit are provided on separate substrates in consideration of routing of wiring patterns (see Patent Document 1).
特開平４－６１３６６号公報JP-A-4-61366
　近年、モータに対し、回路モジュールの小型化が求められるとともに、ＥＭＣ（Ｅｌｅｃｔｒｏｍａｇｎｅｔｉｃ　Ｃｏｍｐａｔｉｂｉｌｉｔｙ；電磁両立性）が求められることがある。ＥＭＣとは、ＥＭＩ（Ｅｌｅｃｔｒｏｍａｇｎｅｔｉｃ　Ｉｎｔｅｒｆｅｒｅｎｃｅ；エミッション、電磁エネルギーが放出する現象）とＥＭＳ（Ｅｌｅｃｔｒｏｍａｇｎｅｔｉｃ　Ｓｕｓｃｅｐｔｉｂｉｌｉｔｙ；イミュニティ、外部からの電磁エネルギーによって性能低下や誤動作を起こさずに動作できる能力）との両立のことである。前者に対しては、両面実装基板や多層基板によって対応可能であるが、後者に対しては、従来の回路構成では対応できない。 In recent years, motors have been required to have smaller circuit modules and EMC (Electromagnetic Compatibility). EMC is the compatibility between EMI (Electromagnetic Interference; emission, a phenomenon in which electromagnetic energy is emitted) and EMS (Electromagnetic Susceptibility; immunity, the ability to operate without performance deterioration or malfunction due to external electromagnetic energy). be. The former can be dealt with by using a double-sided mounting board or a multilayer board, but the latter cannot be dealt with by a conventional circuit configuration.
　以上の問題点に鑑みて、本発明の課題は、信号系回路とパワー系回路とを１枚の基板に搭載した場合でも、電磁面での特性に優れたモータ駆動用回路基板、モータおよびポンプ装置を提供することにある。 In view of the above problems, an object of the present invention is to provide a circuit board for driving a motor, a motor, and a pump that have excellent electromagnetic characteristics even when signal circuits and power circuits are mounted on a single board. It is to provide a device.
　上記課題を解決するために、本発明の一態様は、モータ制御部を含む信号系回路と、駆動電流を出力するスイッチング素子を含むパワー系回路とが、複数の層を有する多層基板に設けられたモータ駆動用回路基板において、前記多層基板では、前記パワー系回路に対するグランドパターン、および信号系回路のグランドパターンが一体の共通グランドパターンとして構成され、前記共通グランドパターンは、前記複数の層のうち、少なくとも１つの層において基板面積の７５％以上の面積を占める第１導電層を含むことを特徴とする。 In order to solve the above problems, in one aspect of the present invention, a signal system circuit including a motor control unit and a power system circuit including a switching element that outputs a drive current are provided on a multilayer substrate having a plurality of layers. In the motor drive circuit board, in the multilayer board, the ground pattern for the power system circuit and the ground pattern for the signal system circuit are integrated as a common ground pattern, and the common ground pattern is one of the plurality of layers. and a first conductive layer occupying an area of 75% or more of the substrate area in at least one layer.
　本発明では、基板が多層基板からなるため、複数の層において配線を配置する位置等に対する設計の自由度が高い。従って、グランドパターンを広い範囲に配置できる。また、グランドパターンは、信号系回路およびパワー系回路の双方に電気的に接続する第１導電層からなる共通グランドパターンを備えており、共通グランドパターンであれば、信号系回路およびパワー系回路の各々に接続するグランドパターンを設けた場合と比較して、広い範囲に連続して一体に設けることができる。従って、１つの基板に駆動回路１５０を設けた場合でも、ＥＭＣ性能に優れている。 In the present invention, since the board consists of a multilayer board, there is a high degree of freedom in designing the position of wiring in multiple layers. Therefore, ground patterns can be arranged in a wide range. Further, the ground pattern includes a common ground pattern composed of a first conductive layer electrically connected to both the signal system circuit and the power system circuit. Compared to the case where a ground pattern connected to each is provided, it is possible to continuously and integrally provide a wide range. Therefore, even when the drive circuit 150 is provided on one substrate, the EMC performance is excellent.
　本発明において、前記共通グランドパターンは、前記複数の層のうち、前記第１導電層が設けられた層と異なる層において基板面積の４０％以上の面積を占める第２導電層を含むことが好ましい。 In the present invention, it is preferable that the common ground pattern includes a second conductive layer occupying an area of 40% or more of the substrate area in a layer different from the layer provided with the first conductive layer among the plurality of layers. .
　本発明において、前記多層基板では、前記多層基板の中心に対して一方側の第１領域にコネクタ用の端子が嵌る複数の端子穴が前記基板の端部に沿うように配置され、前記多層基板の中心に対して前記端子とは反対側の第２領域に前記スイッチング素子が配置され、前記第１領域と前記第２領域との間に前記モータ制御部が配置され、前記第１領域、前記中心、および前記第２領域を通って直線的に延在する仮想線に対して、前記仮想線と交差する方向の領域にノイズ対策用電気素子が実装されている態様を採用することができる。 In the present invention, in the multi-layer board, a plurality of terminal holes into which connector terminals are fitted are arranged in a first area on one side with respect to the center of the multi-layer board along the edges of the board. The switching element is arranged in a second region on the side opposite to the terminal with respect to the center of the, the motor control unit is arranged between the first region and the second region, the first region, the It is possible to employ a mode in which an electric element for noise countermeasures is mounted in a region in a direction intersecting a virtual line linearly extending through the center and the second region.
　本発明の別態様は、モータ制御部を含む信号系回路、および駆動電流を出力するスイッチング素子を含むパワー系回路が基板に設けられたモータ駆動用回路基板において、前記基板では、前記基板の中心に対して一方側の第１領域にコネクタ用の端子が嵌る複数の端子穴が前記基板の端部に沿うように配置され、前記基板の中心に対して前記端子とは反対側の第２領域に前記スイッチング素子が配置され、前記第１領域と前記第２領域との間に前記モータ制御部が配置され、前記第１領域、前記中心、および前記第２領域を通って直線的に延在する仮想線に対して、前記仮想線と交差する方向の領域にノイズ対策用電気素子が実装されていることを特徴とする。 Another aspect of the present invention is a motor drive circuit board provided with a signal system circuit including a motor control unit and a power system circuit including a switching element for outputting a drive current, wherein the board has a center of the board. A plurality of terminal holes into which connector terminals are fitted are arranged along the edge of the substrate in a first region on one side of the substrate, and a second region on the opposite side of the center of the substrate to the terminals. and the motor control unit is disposed between the first region and the second region, extending linearly through the first region, the center, and the second region. A noise countermeasure electric element is mounted in a region in a direction intersecting the imaginary line.
　本発明では、ノイズ対策用電気素子が設けられているため、ＥＭＣ性能に優れている。また、ノイズ対策用電気素子を設けるにあたっては、ノイズ対策用電気素子以外の電気素子を第１領域および第２領域に纏めて配置したため、ノイズ対策用電気素子を配置するスペースを確保することができる。従って、１つの基板に駆動回路を設けた場合でも、ＥＭＣ性能に優れている。 　In the present invention, since the electrical element for noise countermeasures is provided, the EMC performance is excellent. Further, when providing the noise countermeasure electric element, since the electric elements other than the noise countermeasure electric element are collectively arranged in the first area and the second area, it is possible to secure a space for arranging the noise countermeasure electric element. . Therefore, even when the drive circuit is provided on one substrate, the EMC performance is excellent.
　本発明において、前記基板は片面基板である態様を採用することができる。 In the present invention, it is possible to employ an aspect in which the substrate is a single-sided substrate.
　本発明において、前記基板は両面実装基板であり、前記両面実装基板における一方面に前記パワー系回路の電気素子が実装され、前記両面実装基板における他方面に前記ノイズ対策用電気素子が実装されている態様を採用することができる。 In the present invention, the substrate is a double-sided mounting substrate, and the electric element for the power circuit is mounted on one side of the double-sided mounting board, and the noise countermeasure electric element is mounted on the other side of the double-sided mounting board. Any aspect can be adopted.
　本発明において、前記複数の端子穴のうち、両側に配置された端子穴には、前記端子として、定電圧が印加される端子が嵌る態様を採用することができる。 In the present invention, it is possible to employ a mode in which terminals to which a constant voltage is applied are fitted as the terminals in the terminal holes arranged on both sides among the plurality of terminal holes.
　本発明を適用したモータ駆動用回路基板をモータに用いる場合、モータは、前記モータ駆動用回路基板から出力される駆動電流が供給されるコイルを備える。 When the motor drive circuit board to which the present invention is applied is used for a motor, the motor is provided with a coil to which drive current output from the motor drive circuit board is supplied.
　本発明を適用したモータをポンプ装置に用いる場合、ポンプ装置は、前記モータによって回転駆動されるインペラを有する。 When a motor to which the present invention is applied is used in a pump device, the pump device has an impeller that is rotationally driven by the motor.
　本発明の一態様では、基板が多層基板からなるため、複数の層において配線を配置する位置等に対する設計の自由度が高い。従って、グランドパターンを広い範囲に配置できる。また、グランドパターンは、信号系回路およびパワー系回路の双方に電気的に接続する第１導電層からなる共通グランドパターンを備えており、共通グランドパターンであれば、信号系回路およびパワー系回路の各々に接続するグランドパターンを設けた場合と比較して、広い範囲に連続して一体に設けることができる。従って、１つの基板に駆動回路１５０を設けた場合でも、ＥＭＣ性能に優れている。 In one aspect of the present invention, since the substrate is a multi-layer substrate, there is a high degree of freedom in designing the position of wiring in multiple layers. Therefore, ground patterns can be arranged in a wide range. Further, the ground pattern includes a common ground pattern composed of a first conductive layer electrically connected to both the signal system circuit and the power system circuit. Compared to the case where a ground pattern connected to each is provided, it is possible to continuously and integrally provide a wide range. Therefore, even when the drive circuit 150 is provided on one substrate, the EMC performance is excellent.
　本発明の別態様では、ノイズ対策用電気素子が設けられているため、ＥＭＣ性能に優れている。また、ノイズ対策用電気素子を設けるにあたっては、ノイズ対策用電気素子以外の電気素子を第１領域および第２領域に纏めて配置したため、ノイズ対策用電気素子を配置するスペースを確保することができる。従って、１つの基板に駆動回路を設けた場合でも、ＥＭＣ性能に優れている。 In another aspect of the present invention, the electrical element for noise countermeasures is provided, so the EMC performance is excellent. Further, when providing the noise countermeasure electric element, since the electric elements other than the noise countermeasure electric element are collectively arranged in the first area and the second area, it is possible to secure a space for arranging the noise countermeasure electric element. . Therefore, even when the drive circuit is provided on one substrate, the EMC performance is excellent.
本発明を適用したポンプ装置およびモータの一態様を示す斜視図。A perspective view showing one mode of a pump device and a motor to which the present invention is applied. 図１に示すポンプ装置およびモータの縦断面図。FIG. 2 is a longitudinal sectional view of the pump device and motor shown in FIG. 1; 図１に示すポンプ装置からカバーを外した状態を示す分解斜視図。FIG. 2 is an exploded perspective view showing a state in which a cover is removed from the pump device shown in FIG. 1; 図３に示すモータ駆動用回路基板の駆動回路の説明図。FIG. 4 is an explanatory diagram of a drive circuit of the motor drive circuit board shown in FIG. 3; 図３に示すモータ駆動用回路基板の平面構成を模式的に示す説明図。FIG. 4 is an explanatory view schematically showing a planar configuration of the motor drive circuit board shown in FIG. 3; 図３に示すモータ駆動用回路基板のグランドパターンの説明図。FIG. 4 is an explanatory diagram of a ground pattern of the motor drive circuit board shown in FIG. 3; 本発明の実施形態２に係るモータ駆動用回路基板の説明図。FIG. 4 is an explanatory diagram of a motor drive circuit board according to Embodiment 2 of the present invention; 本発明の実施形態２に係るモータ駆動用回路基板の平面構成を模式的に示す説明図。FIG. 5 is an explanatory view schematically showing a planar configuration of a motor driving circuit board according to Embodiment 2 of the present invention; 本発明の実施形態４に係るモータ駆動用回路基板の平面構成を模式的に示す説明図。FIG. 5 is an explanatory view schematically showing a planar configuration of a motor drive circuit board according to Embodiment 4 of the present invention;
　以下、図面を参照して、本発明の実施の形態に係るモータ駆動用回路基板１９、モータ１０およびポンプ装置１を説明する。以下の説明において、モータ軸線Ｌ方向とは、モータ軸線Ｌが延在している方向を意味し、径方向の内側および径方向の外側における径方向とは、モータ軸線Ｌを中心とする半径方向を意味し、周方向とは、モータ軸線Ｌを中心とする回転方向を意味する。 A motor drive circuit board 19, a motor 10, and a pump device 1 according to an embodiment of the present invention will be described below with reference to the drawings. In the following description, the direction of the motor axis L means the direction in which the motor axis L extends, and the radial inner and outer radial directions refer to the radial directions centered on the motor axis L. , and the circumferential direction means the direction of rotation about the motor axis L.
［実施形態１］
（全体構成）
　図１は、本発明を適用したポンプ装置１およびモータ１０の一態様を示す斜視図である。図２は、図１に示すポンプ装置１およびモータ１０の縦断面図である。図３は、図１に示すポンプ装置からカバー１８を外した状態を示す分解斜視図である。図１および図２において、ポンプ装置１は、吸入管２１および吐出管２２を備えたケース２と、ケース２に対してモータ軸線Ｌ方向の一方側Ｌ１に配置されたモータ１０と、ケース２の内部のポンプ室２０に配置されたインペラ２５とを有しており、インペラ２５は、モータ１０によってモータ軸線Ｌ周りに回転駆動される。モータ１０は、円筒状のステータ３と、ステータ３の内側に配置されたロータ４と、ステータ３を覆う樹脂製のハウジング６と、ロータ４を回転可能に支持する支軸５とを備えている。 [Embodiment 1]
(overall structure)
FIG. 1 is a perspective view showing one aspect of a pump device 1 and a motor 10 to which the present invention is applied. FIG. 2 is a longitudinal sectional view of pump device 1 and motor 10 shown in FIG. FIG. 3 is an exploded perspective view of the pump device shown in FIG. 1 with the cover 18 removed. 1 and 2, the pump device 1 includes a case 2 having a suction pipe 21 and a discharge pipe 22, a motor 10 arranged on one side L1 of the case 2 in the direction of the motor axis L, The impeller 25 is arranged in the internal pump chamber 20 , and the impeller 25 is rotationally driven around the motor axis L by the motor 10 . The motor 10 includes a cylindrical stator 3, a rotor 4 arranged inside the stator 3, a resin housing 6 that covers the stator 3, and a support shaft 5 that rotatably supports the rotor 4. .
　モータ１０において、ステータ３は、ステータコア３１と、ステータコア３１に保持されたインシュレータ３２、３３と、ステータコア３１にインシュレータ３２、３３を介して巻回されたコイル３５とを有している。ステータコア３１は、円環状に延在する円環部３１１と、円環部３１１から径方向の内側へ突出する複数の突極３１２とを備えている。インシュレータ３２、３３は各々、ステータコア３１に対してモータ軸線Ｌ方向の両側から重なり、複数の突極３１２の各々に被さっている。コイル３５は、インシュレータ３２、３３を介して突極３１２に巻回されている。モータ１０は３相モータである。 In the motor 10, the stator 3 has a stator core 31, insulators 32 and 33 held by the stator core 31, and a coil 35 wound around the stator core 31 via the insulators 32 and 33. The stator core 31 includes an annular portion 311 extending in an annular shape and a plurality of salient poles 312 protruding radially inward from the annular portion 311 . Each of the insulators 32 and 33 overlaps the stator core 31 from both sides in the direction of the motor axis L and covers each of the plurality of salient poles 312 . The coil 35 is wound around the salient pole 312 via insulators 32 and 33 . Motor 10 is a three-phase motor.
　ロータ４は、モータ軸線Ｌ方向に延在する円筒部４０を備えており、円筒部４０の外周面には、ステータ３に径方向の内側で対向するように円筒状の磁石４７が保持されている。円筒部４０のモータ軸線Ｌ方向の他方側Ｌ２の端部には、円板状のフランジ部４５が形成され、フランジ部４５には、モータ軸線Ｌ方向の他方側Ｌ２から円板２６が連結されている。円板２６のフランジ部４５と対向する面には、複数の羽根部２６１が等角度間隔に形成されており、円板２６は、羽根部２６１を介してフランジ部４５に固定されている。従って、フランジ部４５と円板２６とによって、ロータ４の円筒部４０に接続されたインペラ２５が構成される。 The rotor 4 has a cylindrical portion 40 extending in the direction of the motor axis L. A cylindrical magnet 47 is held on the outer peripheral surface of the cylindrical portion 40 so as to face the stator 3 radially inwardly. there is A disk-shaped flange portion 45 is formed at the end of the cylindrical portion 40 on the other side L2 in the direction of the motor axis L, and the disk 26 is connected to the flange portion 45 from the other side L2 in the direction of the motor axis L. ing. A plurality of blade portions 261 are formed at equal angular intervals on the surface of the disk 26 facing the flange portion 45 , and the disk 26 is fixed to the flange portion 45 via the blade portions 261 . Therefore, the impeller 25 connected to the cylindrical portion 40 of the rotor 4 is configured by the flange portion 45 and the disc 26 .
　ロータ４において、円筒部４０の径方向の内側には円筒状のラジアル軸受１１が保持されており、ロータ４は、ラジアル軸受１１を介して支軸５に回転可能に支持されている。支軸５のモータ軸線Ｌ方向の一方側Ｌ１の端部５１は、ハウジング６の底壁６３に回転不能に保持されている。ケース２は、筒部２８と、筒部２８を支持する支持部２７とを備えており、支軸５のモータ軸線Ｌ方向の他方側Ｌ２の端部５２は、ケース２の筒部２８にスラスト軸受１２を介して支持されている。 A cylindrical radial bearing 11 is held inside the cylindrical portion 40 in the radial direction of the rotor 4 , and the rotor 4 is rotatably supported by the support shaft 5 via the radial bearing 11 . An end portion 51 on one side L1 of the support shaft 5 in the direction of the motor axis L is non-rotatably held by the bottom wall 63 of the housing 6 . The case 2 includes a tubular portion 28 and a support portion 27 that supports the tubular portion 28. An end portion 52 of the support shaft 5 on the other side L2 in the direction of the motor axis L is thrust to the tubular portion 28 of the case 2. It is supported via bearings 12 .
　ハウジング６は、ステータ３を径方向の両側、およびモータ軸線Ｌ方向の両側から覆う樹脂封止部材６０である。従って、ハウジング６は、ポンプ室２０の壁面の一部を構成する第１隔壁部６１と、ステータ３と磁石４７との間に介在する第２隔壁部６２と、ステータ３を径方向の外側から覆う円筒状の胴部６６とを備えている。 The housing 6 is a resin sealing member 60 that covers the stator 3 from both radial sides and both sides in the motor axis L direction. Accordingly, the housing 6 includes a first partition wall portion 61 forming a part of the wall surface of the pump chamber 20, a second partition wall portion 62 interposed between the stator 3 and the magnet 47, and the stator 3 from the outside in the radial direction. and a covering cylindrical body 66 .
　（モータ駆動用回路基板１９等の構成）
　図３は、図１に示すポンプ装置１からカバー１８を外した状態を示す分解斜視図である。なお、図３は、図１および図２に対してモータ軸線Ｌ方向を上下反転してあり、モータ軸線Ｌ方向の一方側Ｌ１を図面の上側としてある。 (Structure of Motor Drive Circuit Board 19, etc.)
FIG. 3 is an exploded perspective view showing a state in which the cover 18 is removed from the pump device 1 shown in FIG. 1. FIG. In FIG. 3, the direction of the motor axis L is vertically inverted with respect to FIGS. 1 and 2, and one side L1 of the direction of the motor axis L is the upper side of the drawing.
　図２および図３に示すように、ハウジング６のモータ軸線Ｌ方向の一方側Ｌ１の端部６４には、モータ軸線Ｌ方向の一方側Ｌ１からカバー１８が固定され、カバー１８とハウジング６の底壁６３との間には、コイル３５に対する給電を制御する回路等が設けられたモータ駆動用回路基板１９が配置されている。モータ駆動用回路基板１９は、切り欠き１９７、１９８を貫通するタッピングねじからなるねじ９１、９２によってハウジング６に固定されている。また、モータ駆動用回路基板１９は、ハウジング６の突部６４５と切り欠き１９９とによって周方向で位置決めされている。 As shown in FIGS. 2 and 3, the cover 18 is fixed from one side L1 of the motor axis L direction to the end portion 64 of the housing 6 on the one side L1 of the motor axis L direction. Between the wall 63 and the motor drive circuit board 19 provided with a circuit for controlling power supply to the coil 35 and the like is arranged. The motor drive circuit board 19 is fixed to the housing 6 by screws 91 and 92 which are tapping screws passing through the notches 197 and 198 . Further, the motor drive circuit board 19 is positioned in the circumferential direction by the protrusion 645 and the notch 199 of the housing 6 .
　モータ駆動用回路基板１９には、ステータ３からハウジング６の底壁６３を貫通してモータ軸線Ｌ方向の一方側Ｌ１に突出した金属製の巻線端子７１が嵌った状態でハンダ付けされた複数の端子穴１９０が設けられている。本形態では、計４つの巻線端子７１が４つの端子穴１９０から突出している。４つの巻線端子７１のうち、３つの巻線端子７１の各々には、直列に接続された３つのコイル３５を構成する巻線の一方の端部が接続されている。残りの１つの巻線端子７１は、コモン（Ｃ）の端子であり、巻線の他方の端部が電気的に接続されている。 A plurality of metal winding terminals 71 protruding from the stator 3 through the bottom wall 63 of the housing 6 to one side L1 in the direction of the motor axis L are fitted and soldered to the motor drive circuit board 19. terminal holes 190 are provided. In this embodiment, a total of four winding terminals 71 protrude from four terminal holes 190 . Each of the three winding terminals 71 out of the four winding terminals 71 is connected to one end of the winding constituting the three coils 35 connected in series. The remaining one winding terminal 71 is a common (C) terminal to which the other end of the winding is electrically connected.
　モータ駆動用回路基板１９には、ハウジング６に保持された金属製のコネクタ端子７５が嵌った状態でハンダ付けされた複数の端子穴１９５が設けられている。従って、モータ駆動用回路基板１９には、モータ駆動用回路基板１９に設けられた駆動回路等を巻線端子７１およびコネクタ端子７５と電気的に接続する配線等が形成されている。 The motor drive circuit board 19 is provided with a plurality of terminal holes 195 in which metal connector terminals 75 held by the housing 6 are fitted and soldered. Therefore, the motor drive circuit board 19 is formed with wirings and the like for electrically connecting the drive circuit and the like provided on the motor drive circuit board 19 to the winding terminals 71 and the connector terminals 75 .
　ハウジング６には、筒状のコネクタハウジング６９が形成されており、コネクタハウジング６９の内側にコネクタ端子７５の端部が位置する。従って、コネクタハウジング６９にコネクタを連結して信号等を供給すると、かかる信号がコネクタ端子７５を介して駆動回路に入力される結果、駆動回路で生成された駆動電流が巻線端子７１を介して各コイル３５に供給される。その結果、ロータ４がモータ軸線Ｌ周りに回転する。これにより、ポンプ室２０内でインペラ２５が回転してポンプ室２０の内部が負圧となるため、流体は吸入管２１からポンプ室２０に吸い込まれて、吐出管２２から吐出される。 A tubular connector housing 69 is formed in the housing 6 , and the ends of the connector terminals 75 are positioned inside the connector housing 69 . Therefore, when a signal or the like is supplied by connecting a connector to the connector housing 69 , the signal is input to the drive circuit through the connector terminal 75 , and as a result, the drive current generated by the drive circuit flows through the winding terminal 71 . It is supplied to each coil 35 . As a result, the rotor 4 rotates around the motor axis L. As a result, the impeller 25 rotates in the pump chamber 20 and the pressure inside the pump chamber 20 becomes negative, so that the fluid is sucked into the pump chamber 20 from the suction pipe 21 and discharged from the discharge pipe 22 .
（駆動回路１５０の構成例）
　図４は、図３に示すモータ駆動用回路基板１９の駆動回路１５０の説明図である。図４には、駆動回路１５０の概略構成を示してある。以下の説明において、３相のコイル３５には、各相を示すＵ、Ｖ、Ｗを付して説明することがあるが、相を特定する必要がない場合、各相を示すＵ、Ｖ、Ｗを付さずに、コイル３５として説明する。 (Configuration example of drive circuit 150)
FIG. 4 is an explanatory diagram of the drive circuit 150 of the motor drive circuit board 19 shown in FIG. FIG. 4 shows a schematic configuration of the drive circuit 150. As shown in FIG. In the following description, the three-phase coil 35 may be described with U, V, and W indicating each phase. It will be described as a coil 35 without attaching W.
　図３に示すモータ駆動用回路基板１９は、基板１１０と、図４に示す駆動回路１５０とを備える。図４に示すように、駆動回路１５０は、モータ１０の回転をＰＷＭ信号により制御するモータ制御部１６１と、モータ制御部１６１からの出力信号に基づいて３相のコイル３５に駆動電流を供給するインバータからなるパワー系回路１７０と、駆動電圧をパワー系回路１７０に供給する駆動電圧線１３５と、３相のコイル３５Ｕ、３５Ｖ、３５Ｗの中性点１６５に接続されるコモン線１４０とを備える。 The motor drive circuit board 19 shown in FIG. 3 includes a board 110 and a drive circuit 150 shown in FIG. As shown in FIG. 4, the drive circuit 150 supplies drive currents to the three-phase coils 35 based on the output signals from the motor control unit 161 that controls the rotation of the motor 10 by PWM signals and the motor control unit 161. It comprises a power system circuit 170 consisting of an inverter, a drive voltage line 135 for supplying a drive voltage to the power system circuit 170, and a common line 140 connected to neutral points 165 of three-phase coils 35U, 35V, and 35W.
　駆動電圧線１３５は、モータ制御部１６１およびパワー系回路１７０に定格１２Ｖの電圧を供給する。また、駆動回路１５０は、外部機器からのＰＷＭ信号をモータ制御部１６１に入力するための制御信号線１１５と、モータ１０の回転数に応じた回転数信号を外部機器に伝達するためのＦＧ出力線１１６とを備える。 The drive voltage line 135 supplies a rated voltage of 12V to the motor control section 161 and the power system circuit 170 . The drive circuit 150 also includes a control signal line 115 for inputting a PWM signal from an external device to the motor control unit 161, and an FG output for transmitting a rotational speed signal corresponding to the rotational speed of the motor 10 to the external device. line 116;
　モータ駆動用回路基板１９は、以下に説明する定電圧用端子７５１、第１信号端子７５２、第２信号端子７５３、およびグランド端子７５４からなる４つのコネクタ端子７５を備える。定電圧用端子７５１は駆動電圧線１３５に電気的に接続され、第１信号端子７５２は制御信号線１１５に電気的に接続され、第２信号端子７５３はＦＧ出力線１１６に電気的に接続され、グランド端子７５４は、モータ駆動用回路基板１９のグランドパターン１００に電気的に接続されている。 The motor drive circuit board 19 has four connector terminals 75 consisting of a constant voltage terminal 751, a first signal terminal 752, a second signal terminal 753, and a ground terminal 754, which will be described below. The constant voltage terminal 751 is electrically connected to the driving voltage line 135, the first signal terminal 752 is electrically connected to the control signal line 115, and the second signal terminal 753 is electrically connected to the FG output line 116. , the ground terminal 754 is electrically connected to the ground pattern 100 of the motor drive circuit board 19 .
　駆動電圧線１３５は、第１線１３６および第２線１３７を介してモータ制御部１６１に電力を供給する。駆動電圧線１３５とグランドパターン１００との間にはコンデンサ１２７が電気的に接続されている。駆動電圧線１３５では、コンデンサ１２７の接続位置より後段で第１線１３６と第２線１３７とが分岐し、第１線１３６とグランドパターン１００との間に電解コンデンサ１２８が接続されている。第２線１３７は、抵抗Ｒ３２を介してモータ制御部１６１と電気的に接続している。 The drive voltage line 135 supplies electric power to the motor control section 161 via the first line 136 and the second line 137 . A capacitor 127 is electrically connected between the drive voltage line 135 and the ground pattern 100 . In the drive voltage line 135 , the first line 136 and the second line 137 are branched after the connecting position of the capacitor 127 , and the electrolytic capacitor 128 is connected between the first line 136 and the ground pattern 100 . The second line 137 is electrically connected to the motor control section 161 via the resistor R32.
　駆動電圧線１３５とグランドパターン１００との間では、コンデンサ１２２、１２３が直列に電気的に接続している。コンデンサ１２２、１２３の間にはコモン線１４０が電気的に接続し、コンデンサ１２３とグランドパターン１００との間には、グランド電位が印加されるグランド端子７５４が電気的に接続されている。 Between the drive voltage line 135 and the ground pattern 100, capacitors 122 and 123 are electrically connected in series. A common line 140 is electrically connected between the capacitors 122 and 123 , and a ground terminal 754 to which a ground potential is applied is electrically connected between the capacitor 123 and the ground pattern 100 .
　制御信号線１１５は、第１信号端子７５２に電気的に接続されており、外部機器からのＰＷＭ信号をモータ制御部１６１に伝達する。制御信号線１１５には、抵抗Ｒ３が直列に電気的に接続されている。制御信号線１１５のうち、抵抗Ｒ３とモータ制御部１６１との間はコンデンサ１２４を介してグランドパターン１００に電気的に接続している。制御信号線１１５のうち、第１信号端子７５２と抵抗Ｒ３との間をコンデンサ１２６を介してグランドパターン１００に電気的に接続する場合があり、この場合、コンデンサ１２６の接続位置と抵抗Ｒ３との間は、第３線１５１を介して第１線１３６に電気的に接続される。第３線１５１には抵抗Ｒ２が直列に電気的に接続されている。 The control signal line 115 is electrically connected to the first signal terminal 752 and transmits the PWM signal from the external device to the motor control section 161 . A resistor R3 is electrically connected in series to the control signal line 115 . The control signal line 115 is electrically connected to the ground pattern 100 via the capacitor 124 between the resistor R3 and the motor controller 161 . In some cases, the first signal terminal 752 and the resistor R3 of the control signal line 115 are electrically connected to the ground pattern 100 via the capacitor 126. In this case, the connection position of the capacitor 126 and the resistor R3 Between is electrically connected to the first line 136 via the third line 151 . A resistor R2 is electrically connected in series to the third line 151 .
　ＦＧ出力線１１６は、モータ制御部１６１から出力されたモータ１０の回転数信号を外部機器に伝達する。ＦＧ出力線１１６には、コンデンサ１２５、抵抗Ｒ１、およびＮＯＴゲートＱ７が接続されている。コンデンサ１２５は、ＦＧ出力線１１６とグランドパターン１００との間に電気的に接続されている。抵抗Ｒ１は、コンデンサ１２５の接続位置とモータ制御部１６１との間において、ＦＧ出力線１１６に直列に電気的に接続されている。ＮＯＴゲートＱ７は、抵抗Ｒ１とモータ制御部１６１との間において、ＦＧ出力線１１６に直列に電気的に接続されている。 The FG output line 116 transmits the rotation speed signal of the motor 10 output from the motor control unit 161 to an external device. A capacitor 125, a resistor R1, and a NOT gate Q7 are connected to the FG output line 116. FIG. Capacitor 125 is electrically connected between FG output line 116 and ground pattern 100 . The resistor R1 is electrically connected in series to the FG output line 116 between the connection position of the capacitor 125 and the motor control section 161 . The NOT gate Q7 is electrically connected in series to the FG output line 116 between the resistor R1 and the motor control section 161.
　モータ制御部１６１は、モータ駆動用回路基板１９に配置されたＩＣチップ等からなる。モータ制御部１６１は、外部機器から入力されるＰＷＭ信号に基づいて、パワー系回路１７０を制御するための出力信号を出力する。また、モータ制御部１６１は、ロータ４の回転数に応じた回転数信号を外部機器に出力する。外部機器は、回転数信号に基づいて、モータ１０を所望の回転数にするために、ＰＷＭ信号をモータ制御部１６１に出力する。 The motor control unit 161 is composed of an IC chip or the like arranged on the motor drive circuit board 19 . Motor control unit 161 outputs an output signal for controlling power system circuit 170 based on a PWM signal input from an external device. Also, the motor control unit 161 outputs a rotational speed signal corresponding to the rotational speed of the rotor 4 to an external device. Based on the rotation speed signal, the external device outputs a PWM signal to the motor control unit 161 in order to set the motor 10 to a desired rotation speed.
　パワー系回路１７０は、Ｕ相のコイル用のスイッチング素子Ｑ１、Ｑ２と、Ｖ相のコイル用のスイッチング素子Ｑ３、Ｑ４と、Ｗ相のコイル用のスイッチング素子Ｑ５、Ｑ６とを備える。スイッチング素子Ｑ１～Ｑ６には、例えば、ＭＯＳ型ＦＥＴが使用されている。スイッチング素子Ｑ１、Ｑ３、Ｑ５のドレインは、駆動電圧線１３５と接続し、スイッチング素子Ｑ２、Ｑ４、Ｑ６のソースは、シャント抵抗Ｒｓを介してグランドパターン１００と接続している。シャント抵抗Ｒｓの両端は、出力線１４１、１４２を介してモータ制御部１６１に接続されている。出力線１４１、１４２には、抵抗Ｒ３３、Ｒ３４が直列に電気的に接続されている。 The power system circuit 170 includes U-phase coil switching elements Q1 and Q2, V-phase coil switching elements Q3 and Q4, and W-phase coil switching elements Q5 and Q6. MOSFETs, for example, are used for the switching elements Q1 to Q6. The drains of the switching elements Q1, Q3 and Q5 are connected to the driving voltage line 135, and the sources of the switching elements Q2, Q4 and Q6 are connected to the ground pattern 100 via the shunt resistor Rs. Both ends of the shunt resistor Rs are connected to the motor control section 161 via output lines 141 and 142 . Resistors R33 and R34 are electrically connected in series to the output lines 141 and 142, respectively.
　スイッチング素子Ｑ１のソースとスイッチング素子Ｑ２のドレインとにはコンデンサ１５１が接続され、スイッチング素子Ｑ３のソースとスイッチング素子Ｑ４のドレインとにはコンデンサ１５２が接続され、スイッチング素子Ｑ５のソースとスイッチング素子Ｑ６のドレインとにはコンデンサ１５３が接続されている。コンデンサ１５１～１５３は、ブートストラップ回路の充放電用コンデンサとなる。コンデンサ１５１～１５３とモータ制御部１６１との間には、ブートストラップ用のダイオードＤ３１～Ｄ３３がそれぞれ接続されている。ダイオードＤ３１～Ｄ３３は、抵抗Ｒ３１を介して、モータ制御部１６１と接続している。 A capacitor 151 is connected between the source of switching element Q1 and the drain of switching element Q2, a capacitor 152 is connected between the source of switching element Q3 and the drain of switching element Q4, and the source of switching element Q5 and the drain of switching element Q6 are connected. A capacitor 153 is connected to the drain. Capacitors 151 to 153 serve as charge/discharge capacitors for the bootstrap circuit. Bootstrap diodes D31 to D33 are connected between the capacitors 151 to 153 and the motor controller 161, respectively. Diodes D31 to D33 are connected to motor control section 161 via resistor R31.
　各スイッチング素子Ｑ１～Ｑ６のゲートとソースとの間には、抵抗Ｒ１１～Ｒ１６がそれぞれ接続されている。各スイッチング素子Ｑ１～Ｑ６のゲートとモータ制御部１６１との間には、抵抗Ｒ２１～Ｒ２６がそれぞれ接続されている。各スイッチング素子Ｑ１～Ｑ６のドレインとソースとの間には、フィルタ１４１～１４６がそれぞれ接続されている。フィルタ１４１～１４６は、直列接続された抵抗とコンデンサとから構成されている。 Resistors R11 to R16 are connected between the gates and sources of the switching elements Q1 to Q6, respectively. Resistors R21 to R26 are connected between the gates of the switching elements Q1 to Q6 and the motor control section 161, respectively. Filters 141-146 are connected between the drains and sources of the switching elements Q1-Q6, respectively. The filters 141-146 are composed of series-connected resistors and capacitors.
　かかるパワー系回路１７０において、スイッチング素子Ｑ１～Ｑ６は、モータ制御部１６１が出力した出力信号に基づいてスイッチングし、３相交流の駆動電流をコイル３５に供給する。 In the power system circuit 170, the switching elements Q1 to Q6 are switched based on the output signal output from the motor control section 161 to supply the coil 35 with a three-phase AC drive current.
（基板１１０等の構成例）
　図５は、図３に示すモータ駆動用回路基板１９の平面構成を模式的に示す説明図である。図６は、図３に示すモータ駆動用回路基板１９のグランドパターン１００の説明図である。 (Configuration example of substrate 110, etc.)
FIG. 5 is an explanatory diagram schematically showing a planar configuration of the motor drive circuit board 19 shown in FIG. FIG. 6 is an explanatory diagram of the ground pattern 100 of the motor drive circuit board 19 shown in FIG.
　図４に示す駆動回路は、例えば、図５に示す基板１１０に構成される。基板１１０は、複数の層を有する多層基板１１０Ａである。多層基板１１０Ａでは、基板本体に積層された複数の絶縁層によって、配線や電極等の導電層が配置される複数の層が構成され、異なる層に形成された導電層は、絶縁層を貫通するコンタクトホールによって電気的に接続されている。配線や電極等の導電層は銅層からなる。 The drive circuit shown in FIG. 4 is configured, for example, on the substrate 110 shown in FIG. Substrate 110 is a multi-layer substrate 110A having multiple layers. In the multilayer substrate 110A, a plurality of insulating layers laminated on the substrate body constitute a plurality of layers in which conductive layers such as wiring and electrodes are arranged, and the conductive layers formed in different layers pass through the insulating layers. They are electrically connected by contact holes. Conductive layers such as wiring and electrodes are made of copper layers.
　図５に示すように、多層基板１１０Ａでは、多層基板１１０Ａの中心Ｏに対して一方側の第１領域１０１にコネクタ端子７５が嵌る複数の端子穴１９５が多層基板１１０Ａの端部に沿うように配置されている。４つの端子穴１９５は、コネクタ端子７５のうち、図４に示す定電圧用端子７５１、第１信号端子７５２、第２信号端子７５３、およびグランド端子７５４が各々嵌る第１端子穴１９１、第２端子穴１９２、第３端子穴１９３、および第４端子穴１９４からなる。本形態において、第１端子穴１９１は定電圧用端子７５１に対応し、第２端子穴１９２は第１信号端子７５２に対応し、第３端子穴１９３は第２信号端子７５３に対応し、第４端子穴１９４はグランド端子７５４に対応する。従って、複数の端子穴１９５のうち、両側の第１端子穴１９１、および第４端子穴１９４は定電圧に対応する。 As shown in FIG. 5, in the multilayer substrate 110A, a plurality of terminal holes 195 into which the connector terminals 75 are fitted are arranged along the edges of the multilayer substrate 110A in the first region 101 on one side with respect to the center O of the multilayer substrate 110A. are placed. The four terminal holes 195 are the first terminal hole 191 and the second terminal hole 191 into which the constant voltage terminal 751, the first signal terminal 752, the second signal terminal 753, and the ground terminal 754 shown in FIG. It consists of a terminal hole 192 , a third terminal hole 193 and a fourth terminal hole 194 . In this embodiment, the first terminal hole 191 corresponds to the constant voltage terminal 751, the second terminal hole 192 corresponds to the first signal terminal 752, the third terminal hole 193 corresponds to the second signal terminal 753, and the second terminal hole 193 corresponds to the second signal terminal 753. The 4-terminal hole 194 corresponds to the ground terminal 754 . Therefore, among the plurality of terminal holes 195, the first terminal holes 191 and the fourth terminal holes 194 on both sides correspond to constant voltage.
　多層基板１１０Ａにおいて、中心Ｏに対して第１領域１０１とは反対側の第２領域１０２にはスイッチング素子Ｑ１～Ｑ６が実装されている。第１領域１０１と第２領域１０２との間にはモータ制御部１６１が設けられている。第１領域１０１、中心Ｏ、および第２領域１０２を通って直線的に延在する仮想線Ｐを中心線とし、仮想線Ｐに対して交差する方向の両側に位置する２つの領域を第３領域１０３および第４領域１０４としたとき、第１領域１０１および第３領域１０３には、巻線端子７１が嵌る複数の端子穴１９０が多層基板１１０Ａの端部に沿うように配置されている。また、図４に示す電解コンデンサ１２８が設けられる場合、電解コンデンサ１２８は第３領域１０３に配置される。 In the multilayer substrate 110A, the switching elements Q1 to Q6 are mounted in the second region 102 on the side opposite to the first region 101 with respect to the center O. A motor control unit 161 is provided between the first area 101 and the second area 102 . A virtual line P extending linearly through the first region 101, the center O, and the second region 102 is defined as the center line, and two regions positioned on both sides in a direction intersecting the virtual line P are the third regions. A plurality of terminal holes 190 in which the winding terminals 71 are fitted are arranged in the first region 101 and the third region 103 along the edges of the multilayer substrate 110A. Moreover, when the electrolytic capacitor 128 shown in FIG. 4 is provided, the electrolytic capacitor 128 is arranged in the third region 103 .
　ここで、図４に示すように、モータ制御部１６１を含む回路を比較的低電圧の信号系回路１６０とし、駆動電流を出力するスイッチング素子Ｑ１～Ｑ６を含む回路を比較的高電圧のパワー系回路１７０としたとき、本形態では、図６を参照して以下に説明するように、グランドパターン１００には、信号系回路１６０およびパワー系回路１７０の双方に電気的に接続する共通グランドパターン１００ｃが含まれている。 Here, as shown in FIG. 4, the circuit including the motor control unit 161 is a relatively low voltage signal system circuit 160, and the circuit including the switching elements Q1 to Q6 for outputting the drive current is a relatively high voltage power system circuit. As for the circuit 170, in this embodiment, as will be described below with reference to FIG. It is included.
　本形態のモータ駆動用回路基板１９において、多層基板１１０Ａは、図６に示す４つの層１１１、１１２、１１３、１１４を備えており、これらの層１１１、１１２、１１３、１１４のうち、最も上層側の層１１１には、図４に示す電気素子が実装されるランド等（図示せず）が形成されている。また、多層基板１１０Ａの４つの層１１１、１１２、１１３、１１４のうち、少なくとも１つの層には、基板面積の７５％以上の面積を占める第１導電層１０６が信号系回路１６０およびパワー系回路１７０の双方に電気的に接続する共通グランドパターン１００ｃとして構成されている。共通グランドパターン１００ｃは、信号系回路１６０のグランドパターン１００としての機能と、パワー系回路１７０に対するに対するグランドパターン１００としての機能の双方を担っている。 In the motor drive circuit board 19 of this embodiment, the multilayer board 110A has four layers 111, 112, 113 and 114 shown in FIG. The side layer 111 is formed with lands (not shown) on which the electric elements shown in FIG. 4 are mounted. At least one of the four layers 111, 112, 113, and 114 of the multilayer board 110A includes a first conductive layer 106 occupying an area of 75% or more of the board area, and a signal circuit 160 and a power circuit. 170 are configured as a common ground pattern 100c electrically connected to both. The common ground pattern 100 c functions both as the ground pattern 100 for the signal system circuit 160 and as the ground pattern 100 for the power system circuit 170 .
　本形態では、４つの層１１１、１１２、１１３、１１４のうち、上層側から第２番目の層１１２に、第１領域１０１、第２領域１０２、第３領域１０３、および第４領域１０４に跨る第１導電層１０６が形成されている。第１導電層１０６において、コンタクトホール、配線、コンタクトホールの周り、および配線の周りには第１導電層１０６が存在しないが、それでも、第１導電層１０６は、基板面積の７５％以上の面積を占めて連続する共通グランドパターン１００ｃを構成している。 In this embodiment, of the four layers 111, 112, 113, and 114, the second layer 112 from the upper layer side extends over the first region 101, the second region 102, the third region 103, and the fourth region 104. A first conductive layer 106 is formed. In the first conductive layer 106, the first conductive layer 106 does not exist in the contact holes, the wiring, around the contact holes, and around the wiring, but the first conductive layer 106 has an area of 75% or more of the substrate area. , forming a continuous common ground pattern 100c.
　さらに、４つの層１１１、１１２、１１３、１１４のうち、上層側から第３番目の層１１３および第４番目の層１１４には、第３領域１０３の一部、第４領域１０４の一部、および第１領域１０１に跨る第２導電層１０７が形成されている。第２導電層１０７において、コンタクトホール、配線、コンタクトホールの周り、および配線の周りには第１導電層１０６が存在しないが、それでも、第２導電層１０７は、基板面積の４０％以上の面積を占めて連続する共通グランドパターン１００ｃを構成している。 Furthermore, among the four layers 111, 112, 113, and 114, the third layer 113 and the fourth layer 114 from the upper layer side include part of the third region 103, part of the fourth region 104, and a second conductive layer 107 extending over the first region 101 . In the second conductive layer 107, the first conductive layer 106 does not exist in the contact holes, wirings, around the contact holes, and around the wirings, but the second conductive layer 107 has an area of 40% or more of the substrate area. , forming a continuous common ground pattern 100c.
　（本形態の主な効果）
　以上説明したように、本形態のモータ駆動用回路基板１９では、基板１１０が多層基板１１０Ａからなるため、複数の層において配線を配置する位置等に対する設計の自由度が高い。従って、グランドパターン１００を広い範囲に配置できる。 (Main effects of this form)
As described above, in the motor drive circuit board 19 of the present embodiment, the board 110 is made of the multilayer board 110A, so that there is a high degree of freedom in designing the positions of the wirings in a plurality of layers. Therefore, the ground pattern 100 can be arranged over a wide range.
　また、グランドパターン１００は、信号系回路１６０およびパワー系回路１７０の双方に電気的に接続する第１導電層１０６からなる共通グランドパターン１００ｃを備えており、共通グランドパターン１００ｃであれば、信号系回路１６０およびパワー系回路１７０の各々に接続するグランドパターンを設けた場合と比較して、広い範囲に連続して一体に設けることができる。より具体的には、基板面積の７５％以上を占める広い範囲で連続した第１導電層１０６からなる共通グランドパターン１００ｃを設けることができる。従って、１つの基板１１０に駆動回路１５０を設けた場合でも、ＥＭＣ性能に優れている。 Further, the ground pattern 100 includes a common ground pattern 100c composed of a first conductive layer 106 electrically connected to both the signal system circuit 160 and the power system circuit 170. The common ground pattern 100c is used for the signal system Compared to the case where a ground pattern connected to each of the circuit 160 and the power system circuit 170 is provided, it can be provided continuously and integrally over a wide range. More specifically, it is possible to provide a common ground pattern 100c composed of the first conductive layer 106 that is continuous over a wide area that occupies 75% or more of the substrate area. Therefore, even when the drive circuit 150 is provided on one substrate 110, the EMC performance is excellent.
　さらに、本形態のモータ駆動用回路基板１９において、グランドパターン１００は、信号系回路１６０およびパワー系回路１７０の双方に電気的に接続する第２導電層１０７からなる共通グランドパターン１００ｃを備えており、第２導電層１０７からなる共通グランドパターン１００ｃは、基板面積の４０％以上を占める広い範囲で連続している。従って、１つの基板１１０に駆動回路１５０を設けた場合でも、ＥＭＣ性能に優れている。 Further, in the motor drive circuit board 19 of this embodiment, the ground pattern 100 includes a common ground pattern 100c composed of the second conductive layer 107 electrically connected to both the signal system circuit 160 and the power system circuit 170. , the common ground pattern 100c composed of the second conductive layer 107 is continuous over a wide range that occupies 40% or more of the substrate area. Therefore, even when the drive circuit 150 is provided on one substrate 110, the EMC performance is excellent.
　また、複数の端子穴１９５のうち、両側の第１端子穴１９１、および第４端子穴１９４は、定電圧に対応するため、第１端子穴１９１、および第４端子穴１９４から延在する配線をシールド配線として利用することができる。 In addition, among the plurality of terminal holes 195, the first terminal hole 191 and the fourth terminal hole 194 on both sides correspond to a constant voltage, so that the wires extending from the first terminal hole 191 and the fourth terminal hole 194 are arranged. can be used as shield wiring.
［実施形態２］
　図７は、本発明の実施形態２に係るモータ駆動用回路基板１９の説明図である。図７には、駆動回路１５０の概略構成を示してある。図８は、本発明の実施形態２に係るモータ駆動用回路基板１９の平面構成を模式的に示す説明図である。なお、本形態の基本的な構成は、実施形態１と同様であるため、共通する部分には、同一の符号を付してそれらの説明を省略する。図７に示すように、本形態のモータ駆動用回路基板１９において、駆動回路１５０には、インダクタ１１８、電解コンデンサ１２１、ダイオード１３１等のノイズ対策用電気素子１８０が設けられている。また、ノイズ対策用電気素子１８０として、フェライトビーズ１１９が設けられることもある。電解コンデンサ１２１の静電容量は１５０μＦである。インダクタ１１８は、駆動電圧線１３５に直列に電気的に接続され、電解コンデンサ１２１およびダイオード１３１は各々、駆動電圧線１３５とグランドパターン１００との間に配置されている。なお、フェライトビーズ１１９およびコンデンサ１２６が設けられる場合、フェライトビーズ１１９は、制御信号線１１５に対し、コンデンサ１２６の接続位置と第３線１５１の分岐位置との間で電気的に接続される。 [Embodiment 2]
FIG. 7 is an explanatory diagram of the motor drive circuit board 19 according to Embodiment 2 of the present invention. FIG. 7 shows a schematic configuration of the drive circuit 150. As shown in FIG. FIG. 8 is an explanatory view schematically showing a planar configuration of the motor drive circuit board 19 according to Embodiment 2 of the present invention. Since the basic configuration of this embodiment is the same as that of the first embodiment, common parts are denoted by the same reference numerals and descriptions thereof are omitted. As shown in FIG. 7, in the motor drive circuit board 19 of the present embodiment, the drive circuit 150 is provided with noise countermeasure electric elements 180 such as an inductor 118, an electrolytic capacitor 121, and a diode 131. FIG. Ferrite beads 119 may also be provided as electrical elements 180 for noise countermeasures. Electrolytic capacitor 121 has a capacitance of 150 μF. Inductor 118 is electrically connected in series to drive voltage line 135 , and electrolytic capacitor 121 and diode 131 are each arranged between drive voltage line 135 and ground pattern 100 . When ferrite bead 119 and capacitor 126 are provided, ferrite bead 119 is electrically connected to control signal line 115 between the connection position of capacitor 126 and the branch position of third line 151 .
　このように構成したモータ駆動用回路基板１９においては、実施形態１と同様、基板１１０が多層基板１１０Ａであり、実施形態１で説明した共通グランドパターン１００ｃが設けられている。また、図８に示すように、多層基板１１０Ａでは、多層基板１１０Ａの中心Ｏに対して一方側の第１領域１０１にコネクタ端子７５が嵌る複数の端子穴１９５が多層基板１１０Ａの端部に沿うように配置され、中心Ｏに対して第１領域１０１とは反対側の第２領域１０２にはスイッチング素子Ｑ１～Ｑ６が実装されている。複数の端子穴１９５のうち、第１端子穴１９１は定電圧用端子７５１に対応し、第４端子穴１９４はグランド端子７５４に対応する。従って、複数の端子穴１９５のうち、両側の第１端子穴１９１、および第４端子穴１９４は、定電圧に対応する。 In the motor drive circuit board 19 configured as described above, the board 110 is the multilayer board 110A, and the common ground pattern 100c described in the first embodiment is provided, as in the first embodiment. Further, as shown in FIG. 8, in the multilayer substrate 110A, a plurality of terminal holes 195 into which the connector terminals 75 are fitted are formed along the edge of the multilayer substrate 110A in the first region 101 on one side with respect to the center O of the multilayer substrate 110A. Switching elements Q1 to Q6 are mounted in a second region 102 opposite to the first region 101 with respect to the center O. As shown in FIG. Among the plurality of terminal holes 195 , the first terminal hole 191 corresponds to the constant voltage terminal 751 and the fourth terminal hole 194 corresponds to the ground terminal 754 . Therefore, among the plurality of terminal holes 195, the first terminal holes 191 and the fourth terminal holes 194 on both sides correspond to constant voltage.
　第１領域１０１と第２領域１０２との間にはモータ制御部１６１が設けられている。第１領域１０１、中心Ｏ、および第２領域１０２を通って直線的に延在する仮想線Ｐを中心線とし、仮想線Ｐに対して交差する方向の両側に位置する２つの領域を第３領域１０３および第４領域１０４としたとき、第１領域１０１および第３領域１０３には、巻線端子７１が嵌る複数の端子穴１９０が多層基板１１０Ａの端部に沿うように配置されている。第３領域１０３には、電解コンデンサ１２８が配置されている。従って、第４領域１０４はスペース的に余裕があることから、第４領域１０４には、電解コンデンサ１２１、インダクタ１１８、ダイオード１３１、およびフェライトビーズ１１９等のノイズ対策用電気素子１８０が配置されている。 A motor control unit 161 is provided between the first area 101 and the second area 102 . A virtual line P extending linearly through the first region 101, the center O, and the second region 102 is defined as the center line, and two regions positioned on both sides in a direction intersecting the virtual line P are the third regions. A plurality of terminal holes 190 in which the winding terminals 71 are fitted are arranged in the first region 101 and the third region 103 along the edges of the multilayer substrate 110A. An electrolytic capacitor 128 is arranged in the third region 103 . Therefore, since the fourth region 104 has a margin in terms of space, noise countermeasure electric elements 180 such as the electrolytic capacitor 121, the inductor 118, the diode 131, and the ferrite bead 119 are arranged in the fourth region 104. .
　このように構成したモータ駆動用回路基板１９では、共通グランドパターン１００ｃに加えて、ノイズ対策用電気素子１８０が設けられているため、ＥＭＣ性能に優れている。また、ノイズ対策用電気素子１８０を設けるにあたっては、ノイズ対策用電気素子１８０以外の電気素子を第１領域１０１、第２領域１０２、および第３領域１０３に纏めて配置したため、第４領域１０４をノイズ対策用電気素子１８０の配置スペースとして利用できる。従って、１つの基板１１０に駆動回路１５０を設けた場合でも、ＥＭＣ性能に優れている。また、ノイズ対策用電気素子１８０については、定電圧（電源）に対応する第１端子穴１９１の近くに配置することによって、ＥＭＣ性能を向上することができる。特に、ノイズ対策用電気素子１８０のうち、インダクタ１１８については、定電圧に対応する第１端子穴１９１の近くに配置することによって、ＥＭＣ性能を特に向上することができる。 In the motor drive circuit board 19 configured in this manner, the electrical element 180 for noise countermeasures is provided in addition to the common ground pattern 100c, so that the EMC performance is excellent. In providing the noise countermeasure electric element 180, since the electric elements other than the noise countermeasure electric element 180 are collectively arranged in the first region 101, the second region 102, and the third region 103, the fourth region 104 is It can be used as an arrangement space for the electrical element 180 for noise countermeasures. Therefore, even when the drive circuit 150 is provided on one substrate 110, the EMC performance is excellent. Further, the noise countermeasure electric element 180 can be arranged near the first terminal hole 191 corresponding to the constant voltage (power supply), thereby improving the EMC performance. In particular, among the electrical elements 180 for noise countermeasures, the inductor 118 can be arranged near the first terminal hole 191 corresponding to the constant voltage to particularly improve the EMC performance.
　［実施形態３］
　実施形態２では、実施形態１で説明した共通グランドパターン１００ｃが設けられているモータ駆動用回路基板１９に対して、ノイズ対策用電気素子１８０が設けられている場合を説明した。これに対して、共通グランドパターン１００ｃが設けられていない多層基板１１０Ａを備えたモータ駆動用回路基板１９に対して、第４領域１０４を利用して、インダクタ１１８、電解コンデンサ１２１、ダイオード１３１、およびフェライトビーズ１１９等のノイズ対策用電気素子１８０が設けてもよい。この場合も、１つの基板１１０に駆動回路１５０を設けた場合でも、ＥＭＣ性能に優れたモータ駆動用回路基板１９を実現することができる。なお、本形態では、基板１１０が多層の片面基板であったが、基板１１０が単層の片面基板である場合に本発明を適用してもよい。 [Embodiment 3]
In the second embodiment, the case where the noise countermeasure electric element 180 is provided for the motor drive circuit board 19 provided with the common ground pattern 100c described in the first embodiment has been described. On the other hand, with respect to the motor drive circuit board 19 including the multilayer board 110A without the common ground pattern 100c, using the fourth region 104, the inductor 118, the electrolytic capacitor 121, the diode 131, and the A noise countermeasure electric element 180 such as a ferrite bead 119 may be provided. In this case as well, even when the driving circuit 150 is provided on one substrate 110, the motor driving circuit substrate 19 with excellent EMC performance can be realized. In this embodiment, the substrate 110 is a multilayer single-sided substrate, but the present invention may be applied to a case where the substrate 110 is a single-layer single-sided substrate.
［実施形態４］
　図９は、本発明の実施形態４に係るモータ駆動用回路基板１９の平面構成を模式的に示す説明図である。図９には、モータ駆動用回路基板１９に用いた両面実装基板１１０Ｂの第１面１１０Ｂ１における電気素子のレイアウト（ａ）と、モータ駆動用回路基板１９に用いた両面実装基板１１０Ｂの第２面１１０Ｂ２における電気素子のレイアウト（ｂ）とを示してある。なお、図９に示すレイアウト（ａ）、（ｂ）のいずれにおいても、第１面１１０Ｂ１の側からみた様子を示してある。 [Embodiment 4]
FIG. 9 is an explanatory view schematically showing the planar configuration of the motor drive circuit board 19 according to Embodiment 4 of the present invention. FIG. 9 shows the layout (a) of the electrical elements on the first surface 110B1 of the double-sided mounting board 110B used for the motor driving circuit board 19, and the second surface of the double-sided mounting board 110B used for the motor driving circuit board 19. Layout (b) of the electrical elements in 110B2 is shown. It should be noted that layouts (a) and (b) shown in FIGS.
　図９に示すモータ駆動用回路基板１９において、基板１１０は両面実装基板１１０Ｂである。両面実装基板１１０Ｂの第１面１１０Ｂ１において、中心Ｏに対して一方側の第１領域１０１にコネクタ端子７５が嵌る複数の端子穴１９５が両面実装基板１１０Ｂの端部に沿うように配置され、両面実装基板１１０Ｂの第２面１１０Ｂ２において、中心Ｏに対して第１領域１０１とは反対側の第２領域１０２にはスイッチング素子Ｑ１～Ｑ６が実装されている。第１領域１０１と第２領域１０２との間にはモータ制御部１６１が設けられている。複数の端子穴１９５のうち、第１端子穴１９１は定電圧用端子７５１に対応し、第４端子穴１９４はグランド端子７５４に対応する。従って、複数の端子穴１９５のうち、両側の第１端子穴１９１、および第４端子穴１９４は、定電圧に対応する。 In the motor drive circuit board 19 shown in FIG. 9, the board 110 is a double-sided mounting board 110B. In the first surface 110B1 of the double-sided mounting board 110B, a plurality of terminal holes 195 into which the connector terminals 75 are fitted are arranged in the first area 101 on one side with respect to the center O along the edges of the double-sided mounting board 110B. On the second surface 110B2 of the mounting substrate 110B, the switching elements Q1 to Q6 are mounted in the second area 102 on the side opposite to the first area 101 with respect to the center O. As shown in FIG. A motor control unit 161 is provided between the first area 101 and the second area 102 . Among the plurality of terminal holes 195 , the first terminal hole 191 corresponds to the constant voltage terminal 751 and the fourth terminal hole 194 corresponds to the ground terminal 754 . Therefore, among the plurality of terminal holes 195, the first terminal holes 191 and the fourth terminal holes 194 on both sides correspond to constant voltage.
　また、第１領域１０１、中心Ｏ、および第２領域１０２を通って直線的に延在する仮想線Ｐを中心線とし、仮想線Ｐに対して交差する方向の両側に位置する２つの領域を第３領域１０３および第４領域１０４としたとき、第１領域１０１の第３領域１０３側の端部と第１領域１０１の第４領域１０４側の端部との間には、巻線端子７１が嵌る複数の端子穴１９０が両面実装基板１１０Ｂの端部に沿うように配置されている。また、第３領域１０３に電解コンデンサ１２８が配置されることがある。従って、第４領域１０４はスペース的に余裕があることから、第４領域１０４には、電解コンデンサ１２１、インダクタ１１８、ダイオード１３１、およびフェライトビーズ１１９等のノイズ対策用電気素子１８０が配置されている。 A virtual line P extending linearly through the first region 101, the center O, and the second region 102 is defined as the center line, and two regions located on both sides of the direction intersecting the virtual line P are defined as the center line. Assuming the third region 103 and the fourth region 104, the winding terminal 71 is provided between the end of the first region 101 on the third region 103 side and the end of the first region 101 on the fourth region 104 side. A plurality of terminal holes 190 for fitting are arranged along the edges of the double-sided mounting board 110B. Also, an electrolytic capacitor 128 may be arranged in the third region 103 . Therefore, since the fourth region 104 has a margin in terms of space, noise countermeasure electric elements 180 such as the electrolytic capacitor 121, the inductor 118, the diode 131, and the ferrite bead 119 are arranged in the fourth region 104. .
　このように構成したモータ駆動用回路基板１９では、ノイズ対策用電気素子１８０以外の電気素子を第１領域１０１、第２領域１０２、および第３領域１０３に纏めて配置したため、第４領域１０４をノイズ対策用電気素子１８０の配置スペースとして利用できる。従って、１つの基板１１０に駆動回路１５０を設けた場合でも、ＥＭＣ性能に優れている。 In the motor drive circuit board 19 configured as described above, the electrical elements other than the noise countermeasure electrical element 180 are collectively arranged in the first area 101, the second area 102, and the third area 103, so that the fourth area 104 is arranged. It can be used as an arrangement space for the electrical element 180 for noise countermeasures. Therefore, even when the drive circuit 150 is provided on one substrate 110, the EMC performance is excellent.
［他の実施の形態］
　上記実施形態では、ポンプ装置１に用いるモータ１０を例示したが、他の機器に搭載されるモータに本発明を適用してもよい。 [Other embodiments]
In the above embodiment, the motor 10 used in the pump device 1 was exemplified, but the present invention may be applied to motors mounted on other devices.
１…ポンプ装置、２…ケース、３…ステータ、４…ロータ、６…ハウジング、１０…モータ、１８…カバー、１９…モータ駆動用回路基板、２０…ポンプ室、２５…インペラ、３２，３３…インシュレータ、３５，３５Ｕ，３５Ｖ，３５Ｗ…コイル、４７…磁石、６０…樹脂封止部材、７１…巻線端子、７５…コネクタ端子、１００…グランドパターン、１００ｃ…共通グランドパターン、１０１…第１領域、１０２…第２領域、１０３…第３領域、１０４…第４領域、１０６…第１導電層、１０７…第２導電層、１１０…基板、１１０Ａ…多層基板、１１０Ｂ…両面実装基板、１１０Ｂ１…第１面、１１０Ｂ２…第２面、１１１，１１２，１１３，１１４…層、１３１…ダイオード、１１８…インダクタ、１１９…フェライトビーズ、１２１…電解コンデンサ、１５０…駆動回路、１６０…信号系回路、１６１…モータ制御部、１７０…パワー系回路、１８０…ノイズ対策用電気素子、１９０，１９５…端子穴、１９１…第１端子穴、１９２…第２端子穴、１９３…第３端子穴、１９４…第４端子穴、７５１…定電圧用端子、７５２…第１信号端子、７５３…第２信号端子、７５４…グランド端子、Ｌ…モータ軸線、Ｏ…中心、Ｐ…仮想線、Ｑ１～Ｑ６…スイッチング素子、ＦＥＴ…ＭＯＳ型、Ｒｓ…シャント抵抗 DESCRIPTION OF SYMBOLS 1... Pump apparatus 2... Case 3... Stator 4... Rotor 6... Housing 10... Motor 18... Cover 19... Motor drive circuit board 20... Pump chamber 25... Impeller 32, 33... Insulator 35, 35U, 35V, 35W Coil 47 Magnet 60 Resin sealing member 71 Winding terminal 75 Connector terminal 100 Ground pattern 100c Common ground pattern 101 First region , 102 . First surface 110B2 Second surface 111, 112, 113, 114 Layer 131 Diode 118 Inductor 119 Ferrite bead 121 Electrolytic capacitor 150 Drive circuit 160 Signal system circuit 161 Motor control unit 170 Power system circuit 180 Noise countermeasure electric element 190, 195 Terminal hole 191 First terminal hole 192 Second terminal hole 193 Third terminal hole 194 Third terminal hole 4 terminal holes 751 constant voltage terminal 752 first signal terminal 753 second signal terminal 754 ground terminal L motor axis line O center center P virtual line Q1 to Q6 switching element , FET... MOS type, Rs... shunt resistor

Claims (8)

  1. 　モータ制御部を含む信号系回路と、駆動電流を出力するスイッチング素子を含むパワー系回路とが、複数の層を有する多層基板に設けられたモータ駆動用回路基板において、
    　前記多層基板では、前記パワー系回路に対するグランドパターン、および信号系回路のグランドパターンが一体の共通グランドパターンとして構成され、
    　前記共通グランドパターンは、前記複数の層のうち、少なくとも１つの層において基板面積の７５％以上の面積を占める第１導電層を含むことを特徴とするモータ駆動用回路基板。     A motor driving circuit board in which a signal system circuit including a motor control unit and a power system circuit including a switching element for outputting a driving current are provided on a multi-layer board having a plurality of layers,
    In the multilayer substrate, the ground pattern for the power system circuit and the ground pattern for the signal system circuit are configured as an integrated common ground pattern,
    The motor drive circuit board, wherein the common ground pattern includes a first conductive layer occupying an area of 75% or more of the board area in at least one of the plurality of layers.
  2. 　請求項１に記載のモータ駆動用回路基板において、
    　前記共通グランドパターンは、前記複数の層のうち、前記第１導電層が設けられた層と異なる層において基板面積の４０％以上の面積を占める第２導電層を含むことを特徴とするモータ駆動用回路基板。     In the motor drive circuit board according to claim 1,
    The motor drive, wherein the common ground pattern includes a second conductive layer occupying an area of 40% or more of the substrate area in a layer different from the layer provided with the first conductive layer among the plurality of layers. circuit board for
  3. 　請求項１または２に記載のモータ駆動用回路基板において、
    　前記多層基板では、前記多層基板の中心に対して一方側の第１領域にコネクタ用の端子が嵌る複数の端子穴が前記基板の端部に沿うように配置され、前記多層基板の中心に対して前記端子とは反対側の第２領域に前記スイッチング素子が配置され、前記第１領域と前記第２領域との間に前記モータ制御部が配置され、前記第１領域、前記中心、および前記第２領域を通って直線的に延在する仮想線に対して、前記仮想線と交差する方向の領域にノイズ対策用電気素子が実装されていることを特徴とするモータ駆動用回路基板。     3. In the motor drive circuit board according to claim 1,
    In the multilayer board, a plurality of terminal holes into which connector terminals are fitted are arranged in a first area on one side with respect to the center of the multilayer board so as to extend along the edge of the board. and the switching element is arranged in a second region on the side opposite to the terminal, the motor control unit is arranged between the first region and the second region, and the first region, the center, and the A circuit board for driving a motor, wherein an electric element for noise countermeasures is mounted in a region in a direction intersecting a virtual line extending linearly through a second region.
  4. 　モータ制御部を含む信号系回路、および駆動電流を出力するスイッチング素子を含むパワー系回路が基板に設けられたモータ駆動用回路基板において、
    　前記基板では、前記基板の中心に対して一方側の第１領域にコネクタ用の端子が嵌る複数の端子穴が前記基板の端部に沿うように配置され、前記基板の中心に対して前記端子とは反対側の第２領域に前記スイッチング素子が配置され、前記第１領域と前記第２領域との間に前記モータ制御部が配置され、前記第１領域、前記中心、および前記第２領域を通って直線的に延在する仮想線に対して、前記仮想線と交差する方向の領域にノイズ対策用電気素子が実装されていることを特徴とするモータ駆動用回路基板。     A motor drive circuit board provided with a signal system circuit including a motor control unit and a power system circuit including a switching element for outputting a drive current,
    In the board, a plurality of terminal holes into which connector terminals are fitted are arranged along the edge of the board in a first region on one side with respect to the center of the board, and the terminals are arranged with respect to the center of the board. The switching element is arranged in a second region on the opposite side to the second region, the motor control unit is arranged between the first region and the second region, and the first region, the center, and the second region 1. A circuit board for driving a motor, wherein an electrical element for noise countermeasures is mounted in a region in a direction intersecting an imaginary line extending linearly through said imaginary line.
  5. 　請求項４に記載のモータ駆動用回路基板において、
    　前記基板は片面基板であることを特徴とするモータ駆動用回路基板。     In the motor drive circuit board according to claim 4,
    A circuit board for driving a motor, wherein the board is a single-sided board.
  6. 　請求項４に記載のモータ駆動用回路基板において、
    　前記基板は両面実装基板であり、
    　前記両面実装基板における一方面に前記パワー系回路の電気素子が実装され、
    　前記両面実装基板における他方面に前記ノイズ対策用電気素子が実装されていることを特徴とするモータ駆動用回路基板。     In the motor drive circuit board according to claim 4,
    The substrate is a double-sided mounting substrate,
    an electric element of the power system circuit is mounted on one side of the double-sided mounting board,
    A circuit board for driving a motor, wherein the electric element for noise suppression is mounted on the other side of the double-sided mounting board.
  7. 　請求項１から６までの何れか一項に記載のモータ駆動用回路基板を備えたモータであって、
    　前記モータ駆動用回路基板から出力される駆動電流が供給されるコイルを備えることを特徴とするモータ。     A motor comprising the motor drive circuit board according to any one of claims 1 to 6,
    A motor comprising a coil supplied with a drive current output from the motor drive circuit board.
  8. 　請求項７に記載のモータを備えたポンプ装置であって、
    　前記モータによって回転駆動されるインペラを有することを特徴とするポンプ装置。     A pump device comprising the motor according to claim 7,
    A pump device comprising an impeller that is rotationally driven by the motor.
PCT/JP2022/037467 2021-10-08 2022-10-06 Motor driving circuit board, motor, and pump device WO2023058722A1 (en)

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JP2020167920A (en) * 2019-03-29 2020-10-08 日本電産トーソク株式会社 Electric oil pump

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* Cited by examiner, † Cited by third party
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JP2019080471A (en) * 2017-10-27 2019-05-23 オムロンオートモーティブエレクトロニクス株式会社 Load driving device
JP2020167920A (en) * 2019-03-29 2020-10-08 日本電産トーソク株式会社 Electric oil pump

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