Abstract: A wiring board (3) has first and second rigid sections (11, 12) each having six metal leaf layers, and a flexible section (13) having two metal leaf layers that connect the both rigid sections (11, 12). A capacitor unit (34) and a filter unit 31, which supplies power to an inverter, are mounted on the first rigid section (11), and a CPU (21) and a pre-driver circuit element (22) are mounted on the second rigid section (12). Mutually-independent two control systems are arranged so as to be symmetrical about a board center line (M). Detection signal lines (51) of rotation sensors (37, 38) located at the middle of the first rigid section (11) extend along the board center line (M) on the flexible section (13). Each of the two control systems is configured along a wiring direction of the detection signal lines (51).

Abstract: A wiring board (3) has first and second rigid sections (11, 12) each having six metal leaf layers, and a flexible section (13) having two metal leaf layers that connect the both rigid sections (11, 12). A capacitor unit (34) and a filter unit 31, which supplies power to an inverter, are mounted on the first rigid section (11), and a CPU (21) and a pre-driver circuit element (22) are mounted on the second rigid section (12). Mutually-independent two control systems are arranged so as to be symmetrical about a board center line (M). Detection signal lines (51) of rotation sensors (37, 38) located at the middle of the first rigid section (11) extend along the board center line (M) on the flexible section (13). Each of the two control systems is configured along a wiring direction of the detection signal lines (51).

Abstract: A wiring board (3) has first and second rigid sections (11, 12) each having six metal leaf layers, and a flexible section (13) having two metal leaf layers that connect the both rigid sections (11, 12). A capacitor unit (34) and a filter unit 31, which supplies power to an inverter, are mounted on the first rigid section (11), and a CPU (21) and a pre-driver circuit element (22) are mounted on the second rigid section (12). Mutually-independent two control systems are arranged so as to be symmetrical about a board center line (M). Detection signal lines (51) of rotation sensors (37, 38) located at the middle of the first rigid section (11) extend along the board center line (M) on the flexible section (13). Each of the two control systems is configured along a wiring direction of the detection signal lines (51).

Abstract: A circuit board (3) is provided with a first rigid part (11) having a power system electronic component mounted thereon, a second rigid part (12) having a control system electronic component mounted thereon, and a thin flexible part (13) connecting the first and second rigid parts to each other. The flexible part (13) is provided with a plurality of conductive wires (27) conducted with the electronic components of the first and second rigid parts (11, 12). A non-conductive metal pattern (33) that is a dummy pattern is formed along an outer edge (13a) of the flexible part (13). By the non-conductive metal pattern (33), the disconnection of the conductive wires (27) due to cracking is suppressed.

Abstract: A circuit board (3) is provided with a first rigid part (11) having a power system electronic component mounted thereon, a second rigid part (12) having a control system electronic component mounted thereon, and a thin flexible part (13) connecting the first and second rigid parts to each other. The flexible part (13) is provided with a plurality of conductive wires (27) conducted with the electronic components of the first and second rigid parts (11, 12). A non-conductive metal pattern (33) that is a dummy pattern is formed along an outer edge (13a) of the flexible part (13). By the non-conductive metal pattern (33), the disconnection of the conductive wires (27) due to cracking is suppressed.

Abstract: A wiring board (3) has first and second rigid sections (11, 12) each having six metal leaf layers, and a flexible section (13) having two metal leaf layers that connect the both rigid sections (11, 12). A capacitor unit (34) and a filter unit 31, which supplies power to an inverter, are mounted on the first rigid section (11), and a CPU (21) and a pre-driver circuit element (22) are mounted on the second rigid section (12). Mutually-independent two control systems are arranged so as to be symmetrical about a board center line (M). Detection signal lines (51) of rotation sensors (37, 38) located at the middle of the first rigid section (11) extend along the board center line (M) on the flexible section (13). Each of the two control systems is configured along a wiring direction of the detection signal lines (51).

Abstract: A circuit board (3) of an electronic control device has a connector fixing screw penetration hole (16) which a connector fixing screw penetrates, a resist layer (13) and a joining portion (23) which is formed at a circumference of connector fixing screw penetration hole (16) and to which the connector fixing screw can be soldered. Joining portion (23) is formed at an inner side of a resist layer opening (22) which is open at the circumference of connector fixing screw penetration hole (16). Joining portion (23) is formed so that an area of joining portion (23) located at an inner side of circuit board (3) with respect to a center (C1) of connector fixing screw penetration hole (16) is larger than an area of joining portion (23) located at an outer side of circuit board (3) with respect to the center (C1) of connector fixing screw penetration hole (16).

Abstract: A circuit board (3) of an electronic control device has a connector fixing screw penetration hole (16) which a connector fixing screw penetrates, a resist layer (13) and a joining portion (23) which is formed at a circumference of connector fixing screw penetration hole (16) and to which the connector fixing screw can be soldered. Joining portion (23) is formed at an inner side of a resist layer opening (22) which is open at the circumference of connector fixing screw penetration hole (16). Joining portion (23) is formed so that an area of joining portion (23) located at an inner side of circuit board (3) with respect to a center (C1) of connector fixing screw penetration hole (16) is larger than an area of joining portion (23) located at an outer side of circuit board (3) with respect to the center (C1) of connector fixing screw penetration hole (16).

Abstract: To increase vibration resistance of a connection terminal, a tip of which is soldered to a circuit board. In a controller, the circuit board is accommodated in a controller housing made of metal, and the tip of the connection terminal that extends from an actuator housing through an opening is fixed to the circuit board. Semiconductor switching elements and electrolytic capacitors as heat generating components are collectively arranged in an area of the circuit board adjacent to the connection terminal, and the circuit board is adhered and fixed to a top surface of a heat mass via a thermal conductive adhesive. At the same time as that heat dissipation is improved by the thermal conductive adhesive, a load caused by vibration is reduced because the circuit board is fixed at a position near the connection terminal to the controller housing.