Abstract: A steering angle detection device includes plural control units and plural steering angle sensors. Each control unit is configured to transmit steering angle information related to a steering angle of a vehicle to an external device and transmit and receive information mutually therebetween. Each steering angle sensor is provided in correspondence to each control unit and configured to output a sensor signal corresponding to a detection value of a change in the steering angle to the corresponding control unit. One of the control units transmits, as a transmission control unit, the steering angle information to the external device at one transmission timing.

Abstract: A steering angle detection device is provided with a plurality of rotation angle sensors and a plurality of control units. The rotation angle sensors are capable of at least continuously calculating a rotation speed while an ignition switch of a vehicle is turned off, and are provided so as to correspond to steering angle calculation units which calculate steering angle based on the rotation speed and a rotation angle acquired from the rotation angle sensors and midpoint information related to the neutral position of a steering member. Power supplies are provided on a per-system basis. The rotation angle sensors or the control units are capable of holding the midpoint information while the ignition switch is turned off. If a power supply abnormality resulting in power supply failure occurs in some of the systems, the control unit of the abnormal system acquires the midpoint information and the rotation speed from the control unit of a normal system when the ignition switch is turned on.

Abstract: A semiconductor module includes: semiconductor devices; a resin mold that integrally seals the semiconductor devices; and external terminals that are disposed at a lateral side of the resin mold along a direction perpendicular to a thickness direction of the semiconductor devices. Each semiconductor device includes an insulated gate semiconductor device having a gate electrode, a first electrode, and a second electrode. In the insulated gate semiconductor device, carriers move from the first electrode to the second electrode through a channel provided by a voltage applied to the gate electrode. The external terminals include: a gate terminal electrically connected to the gate electrode; a first terminal electrically connected to the first electrode; and a second terminal electrically connected to the second electrode. The gate terminal and the second terminal, which are electrically connected to an identical semiconductor device, are not adjacent to each other.

Abstract: In a rotation detecting apparatus, each of first and second sensor elements measures rotation of a detection target. A circuit module includes first and second rotational angle calculators each calculating, based on a corresponding one of a first measurement value of the first sensor element and a second measurement value of the second sensor element, a rotational angle of the detection target. The circuit module includes first and second rotation number calculators each calculating, based on the corresponding one of the first measurement value and the second measurement value, a rotation number of the detection target. The circuit module includes first and second communicators each outputting, to a controller, a rotational angle signal based on the rotational angle and a rotation number signal based on the rotation number. A package packages the first and second sensor elements, and is mounted to a circuit board separately from the controller.

Abstract: A semiconductor module includes: semiconductor devices; a resin mold that integrally seals the semiconductor devices; and external terminals that are disposed at a lateral side of the resin mold along a direction perpendicular to a thickness direction of the semiconductor devices. Each semiconductor device includes an insulated gate semiconductor device having a gate electrode, a first electrode, and a second electrode. In the insulated gate semiconductor device, carriers move from the first electrode to the second electrode through a channel provided by a voltage applied to the gate electrode. The external terminals include: a gate terminal electrically connected to the gate electrode; a first terminal electrically connected to the first electrode; and a second terminal electrically connected to the second electrode. The gate terminal and the second terminal, which are electrically connected to an identical semiconductor device, are not adjacent to each other.

Abstract: A drive device includes a cover and a connector case. The cover is shaped into a cup form and has a connector insertion hole at a bottom portion of the cover. In a view taken in a connector inserting direction, the connector insertion hole is larger than a contour of a connector portion of the connector case, and a gap between an inner wall surface of the connector insertion hole and the contour of the connector portion is equal to or smaller than 3 mm. Thereby, although the connector insertion hole is formed to be larger than the connector portion to enable the insertion of the connector portion into the connector insertion hole at a time of assembly, a size of a cross section of the opening of the connector insertion hole is minimized.

Abstract: A steering angle detection device is provided with a plurality of rotation angle sensors and a plurality of control units. The rotation angle sensors are capable of at least continuously calculating a rotation speed while an ignition switch of a vehicle is turned off, and are provided so as to correspond to steering angle calculation units which calculate steering angle based on the rotation speed and a rotation angle acquired from the rotation angle sensors and midpoint information related to the neutral position of a steering member. Power supplies are provided on a per-system basis. The rotation angle sensors or the control units are capable of holding the midpoint information while the ignition switch is turned off. If a power supply abnormality resulting in power supply failure occurs in some of the systems, the control unit of the abnormal system acquires the midpoint information and the rotation speed from the control unit of a normal system when the ignition switch is turned on.

Abstract: A steering angle detection device includes plural control units and plural steering angle sensors. Each control unit is configured to transmit steering angle information related to a steering angle of a vehicle to an external device and transmit and receive information mutually therebetween. Each steering angle sensor is provided in correspondence to each control unit and configured to output a sensor signal corresponding to a detection value of a change in the steering angle to the corresponding control unit. One of the control units transmits, as a transmission control unit, the steering angle information to the external device at one transmission timing.

Abstract: In a rotation detecting apparatus, while a switch is in an on state so that electrical power is supplied from a power source to a controller via the switch, the controller receives, as a first output signal, an output signal output from an output unit of a first rotation sensor, and receives, as a second output signal, an output signal output from an output unit of the second rotation sensor. The first output signal includes at least the first rotational information and the second rotational information based on the first rotation sensor, and the second output signal includes at least the first rotational information and the second rotational information based on the second rotation sensor. The controller determines whether there is a malfunction in each of the first and second rotation sensors as a function of the first output signal and the second output signal.

Abstract: A drive device includes a cover and a connector case. The cover is shaped into a cup form and has a connector insertion hole at a bottom portion of the cover. In a view taken in a connector inserting direction, the connector insertion hole is larger than a contour of a connector portion of the connector case, and a gap between an inner wall surface of the connector insertion hole and the contour of the connector portion is equal to or smaller than 3 mm. Thereby, although the connector insertion hole is formed to be larger than the connector portion to enable the insertion of the connector portion into the connector insertion hole at a time of assembly, a size of a cross section of the opening of the connector insertion hole is minimized.

Abstract: In a rotation detecting apparatus, a sensor includes a sensor element outputting a measurement value representing rotation of a detection target, and a circuit module. The circuit module includes a rotational angle calculator calculating, based on the measurement value, rotational angle information indicative of a rotational angle of the detection target. The rotational angle calculator generates a rotational angle signal including the rotational angle information. The circuit module includes a rotation number calculator calculating, based on the measurement value, rotation number information representing the number of rotations of the detection target. The rotation number calculator generates a rotation number signal including the rotation number information. An output unit outputs, as an output signal, a series of the rotational angle signal and the rotation number signal.

Abstract: In a rotation detecting apparatus, each of first and second sensor elements measures rotation of a detection target. A circuit module includes first and second rotational angle calculators each calculating, based on a corresponding one of a first measurement value of the first sensor element and a second measurement value of the second sensor element, a rotational angle of the detection target. The circuit module includes first and second rotation number calculators each calculating, based on the corresponding one of the first measurement value and the second measurement value, a rotation number of the detection target. The circuit module includes first and second communicators each outputting, to a controller, a rotational angle signal based on the rotational angle and a rotation number signal based on the rotation number. A package packages the first and second sensor elements, and is mounted to a circuit board separately from the controller.

Abstract: A first power control system has a first to a third motor wires and a second power control system has a fourth to a sixth motor wires. The first to the third motor wires and the fourth to the sixth motor wires are located on a concentric circle of a center of a magnet and located to be symmetrical to each other with respect to the magnet. The first and the third motor wires, which are located at both sides of the second motor wire in a circumferential direction of an electric motor portion, are asymmetrically arranged with respect to the second motor wire. The fourth and the sixth motor wires, which are located at both sides of the fifth motor wire in the circumferential direction, are asymmetrically arranged with respect to the fifth motor wire. As a result, a size of an electrical driving device can be made smaller.

Abstract: In a rotation detecting apparatus, while a switch is in an on state so that electrical power is supplied from a power source to a controller via the switch, the controller receives, as a first output signal, an output signal output from an output unit of a first rotation sensor, and receives, as a second output signal, an output signal output from an output unit of the second rotation sensor. The first output signal includes at least the first rotational information and the second rotational information based on the first rotation sensor, and the second output signal includes at least the first rotational information and the second rotational information based on the second rotation sensor. The controller determines whether there is a malfunction in each of the first and second rotation sensors as a function of the first output signal and the second output signal.

Abstract: A connector unit of a drive device includes an electric power supply connector, a signal connector, a base portion and leg portions and is fixed to an opposite side of a heat sink, which is opposite from an electric motor. The leg portions are formed at an outer peripheral edge of the base portion. A cover member receives the connector unit and the heat sink in the state where the electric power supply connector and the signal connector are exposed from the cover member. A connector side O-ring is installed between the base portion and the cover member. A height position of a first end surface of each leg portion is on a first side of a second base end surface of the base portion. With this construction, it is possible to limit deterioration of waterproofness of the drive device caused by a thermal load.

Abstract: A rotation angle detector has a rotation angle sensor and a microcomputer, where the sensor detects a change of a magnetic field of a magnet that rotates with a shaft. The microcomputer has a first corrector for correcting a pre-correction mechanical angle, based on a first correction value that corrects an error due to an assembly process for assembling the magnet and the sensor, and a second corrector for correcting the pre-correction mechanical angle based on a second correction value that corrects an error due to a spill magnetic flux that is generated by a supply of an electric current to a winding wire. In such configuration, the rotation angle detector may correct the error due to the spill magnetic flux, thereby enabling an accurate detection of a mechanical angle.

Abstract: In a rotation detecting apparatus, a sensor includes a sensor element outputting a measurement value representing rotation of a detection target, and a circuit module. The circuit module includes a rotational angle calculator calculating, based on the measurement value, rotational angle information indicative of a rotational angle of the detection target. The rotational angle calculator generates a rotational angle signal including the rotational angle information. The circuit module includes a rotation number calculator calculating, based on the measurement value, rotation number information representing the number of rotations of the detection target. The rotation number calculator generates a rotation number signal including the rotation number information. An output unit outputs, as an output signal, a series of the rotational angle signal and the rotation number signal.

Abstract: A connector unit of a drive device includes an electric power supply connector, a signal connector, a base portion and leg portions and is fixed to an opposite side of a heat sink, which is opposite from an electric motor. The leg portions are formed at an outer peripheral edge of the base portion. A cover member receives the connector unit and the heat sink in the state where the electric power supply connector and the signal connector are exposed from the cover member. A connector side O-ring is installed between the base portion and the cover member. A height position of a first end surface of each leg portion is on a first side of a second base end surface of the base portion. With this construction, it is possible to limit deterioration of waterproofness of the drive device caused by a thermal load.

Abstract: A circuit board is held by a holding member. A connector portion is located on an opposite side of the circuit board from the holding member. A connector terminal is projected from a portion of the peripheral wall portion, bent at a bent portion toward the circuit board, and connected with the circuit board. The connector terminal includes a projected portion, which is located closer to the peripheral wall portion than the bent portion, and an inserted portion, which is inserted in a through hole of the circuit board. The projected portion is shifted from the inserted portion when viewed from a side of the connector portion.

Abstract: A circuit board is held by a holding member. A connector portion is located on an opposite side of the circuit board from the holding member. A connector terminal is projected from a portion of the peripheral wall portion, bent at a bent portion toward the circuit board, and connected with the circuit board. The connector terminal includes a projected portion, which is located closer to the peripheral wall portion than the bent portion, and an inserted portion, which is inserted in a through hole of the circuit board. The projected portion is shifted from the inserted portion when viewed from a side of the connector portion.