Abstract: A control unit having a detection device that includes: a multi-turn detection unit capable of continuing detection of a rotation position of multiple rotations of a steering shaft driven by a motor without power supply from outside; a position detector detecting the rotation position in one rotation of the rotor; a count calculator calculating multiple rotation position information related to the rotation position of multiple rotations based on a detection value of the multi-turn detection unit; and an angle calculator calculating a motor rotation angle related to the rotation position in one rotation based on a detection value of the position detector. The multi-turn detection unit is disposed at a position different from the motor, thereby detection of the rotation position of multiple rotations is continuable even when a supply of electric power from outside is interrupted.

Abstract: A power supply system includes a system control unit, an auxiliary power supply, and an auxiliary-power-supply control unit. The system control unit and the auxiliary-power-supply control unit are configured such that information of at least one control unit of the system control unit and the auxiliary-power-supply control unit is able to be output to another control unit of the system control unit and the auxiliary-power-supply control unit. The at least one control unit is configured to output information indicating that an operation of the at least one control unit is stopped to the other control unit when the at least one control unit stops the operation of the at least one control unit.

Abstract: A main detection element detects a physical quantity that changes according to a rotation of a detection target. A sub detection element detects a physical quantity that changes according to the rotation of the detection target. A signal processing unit outputs main rotation information that is information corresponding to a detection value of the main detection element and sub rotation information that is information corresponding to a detection value of the sub detection element. A package seals the main detection element, the sub detection element, and the signal processing unit. Centers of all the main and the sub detection elements are arranged at positions shifted from a detection center of the detection target. The main detection element is arranged at a position closer to the detection center than the sub detection element. The package is arranged at a position where a center of the package deviates from the detection center.

Abstract: A semiconductor module includes a switching element, a sealing portion, a drain terminal, a source terminal, and a gate terminal. The drain terminal is connected to a drain of the switching element. The source terminal is connected to a source of the switching element. The gate terminal is connected to a gate of the switching element. The sealing portion has a rectangular shape in a plan view, and molds the switching element. Each of the drain terminal, the source terminal, and the gate terminal is exposed from the sealing portion on a short side of the rectangle.

Abstract: An electronic device includes an upper and lower arm module including an upper arm element and a lower arm element as one module, a relay module including one relay element that switches connection and disconnection between the upper and lower arm module and an output terminal, and a peripheral component including at least one of a current detection element and a noise removal element. The upper and lower arm module, the relay module and the output terminal are arranged in this order along a direction from a centerline of the substrate toward an outer end of the substrate on a same surface of a substrate. The peripheral component is arranged side by side with the relay module in a region between the upper and lower arm module and the output terminal.

Abstract: A semiconductor package includes semiconductor elements, a lead frame, a crosslinked member, and sealing resin. Each of the semiconductor elements has a first surface and a second surface located on a side opposite to the first surface. The lead frame has a mounting portion and a connected portion. At least one of the semiconductor elements mounts on the mounting portion. The connected portion is separated from the mounting portion. The crosslinked member is connected to the second surface of at least one of the semiconductor elements and the connected portion to electrically connect at least one of the semiconductor elements and the connected portion. The sealing resin is electrically insulated and covers a portion of the lead frame, the semiconductor elements and the crosslinked member. At least one of the semiconductor elements is different from another one of the semiconductor elements in element size or power consumption.

Abstract: A detection unit has a detection element for detecting a change of magnetic field according to a rotation of a magnet, and an angle calculator for calculating an angle signal according to a detected physical quantity detected by the detection element. Further, a storage stores a plurality of correction values for correcting detection error of the angle signal, and another storage stores a plurality of correction values for correcting detection error of the angle signal. An abnormality determiner determines abnormality of the correction values, an another abnormality determiner determines abnormality of the correction values. A control calculator performs a control calculation by using the angle signals corrected by using the correction value having been determined as normal.

Abstract: An electric power steering apparatus has a rotation detection device that includes a sensor section that detects a rotation of a motor and outputs a mechanical angle and a count value, and a signal obtainer that obtains the mechanical angle and the count value from the sensor section. The rotation detection device also includes an absolute angle calculator that calculates an absolute angle based on the mechanical angle and the count value and a storage area for storing a reference value that is used for correcting calculation errors in the absolute angle.

Abstract: A first circuit energizes a steering assist actuator to electrically assist steering of a driver. A second circuit is provided in a same housing as the first circuit and energizes a positional actuator to move a steering position. A controller operates the first and second circuits to control operations of the steering assist actuator and the positional actuator. The controller changes a priority between the first circuit and the second circuit in a start period, in which the steering control device is started, a normal operation period, in which the steering control device is operated normally, and a stop period, in which the steering control device is stopped. The priority includes at least one of an order of operating the first circuit and the second circuit, output allocation between the first circuit and the second circuit, and output magnitude between the first circuit and the second circuit.

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 position detection device includes a first positional sensor mounted on a reference portion, and a second positional sensor mounted on a detection target that is movable relative to the reference portion. A controller calculates a position of the detection target based on a detection value of the first positional sensor and a detection value of the second positional sensor. The position detection device may be applied to a steer-by-wire system for a vehicle. The reference portion may be a fixed portion of the vehicle, and the detection target may be a steering wheel or a vehicle wheel of the vehicle. The controller may calculate a steering angle of the steering wheel or a turning angle of the vehicle wheel as the position of the detection target.

Abstract: An ECU, which is a signal control apparatus, has a plurality of control units, which control one same motor. Steering angle calculation units acquire sensor signals from the angle sensors provided corresponding to the steering angle calculation units, respectively, and calculate the steering angles in correspondence to the sensor signals. The angle FB units perform the angle FB control based on the angle differences, which are between the target angle and the steering angle and between the target angle and the steering angle, respectively. In the angular FB unit of at least one of the control units, the angular feedback control is performed using the angle difference, which is subjected to the correction processing to reduce the error between the detection angle of the own system and the detection angle of the other system calculated by the steering angle calculation unit of the other control unit.

Abstract: A magnet holder is used in a rotational angle sensing device and is shaped in a tubular form while the magnet holder is configured to hold a magnet opposed to a magnetic sensor and is also configured to be securely press-fitted to a rotatable body. The magnet holder includes: a magnet holding portion that is located at one side of the magnet holder in an axial direction; a press-fitting fixation portion that is located at another side of the magnet holder in the axial direction; and a connecting portion that connects between the magnet holding portion and the press-fitting fixation portion. An outer diameter of the press-fitting fixation portion is different from an outer diameter of the magnet holding portion, and a wall thickness of the press-fitting fixation portion is different from a wall thickness of the magnet holding portion.

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: In a detection unit, a control unit includes an abnormality monitoring unit and a control calculation unit, and obtains an angle signal from different sensor units. The abnormality monitoring unit monitors abnormality of the angle signal. The control calculation unit performs calculation by using the angle signal. A second control unit obtains the angle signal by communication with a first control unit, i.e., from an other control unit. The abnormality monitoring unit, when comparing a subject system calculation value with an other system calculation value, uses a communication delay corrected value which has a correction of communication delay as at least one of the subject system calculation value and the other system calculation value.

Abstract: An electric power steering apparatus has a rotation detection device that can recover from abnormalities in calculating an absolute angle. The rotation detection device includes a signal acquirer that acquires a mechanical angle and a count value from a sensor, and an absolute angle calculator that calculates an absolute angle based on the mechanical angle and the count value. The rotation detection device further includes an abnormality determiner that determines abnormalities in the calculation of the absolute angle. The absolute angle calculator stores an absolute angle hold value prior to the detection of the abnormality the absolute angle. When the abnormality of the absolute angle is resolved, the absolute angle calculator calculates a recovery-time absolute angle, and returns to a normal-time absolute angle calculation.

Abstract: An electric power steering apparatus has a rotation detection device for calculating an absolute angle that includes a sensor section that detects a rotation of a motor and outputs a mechanical angle and a count value. The rotation detection device also includes a signal acquisition unit that obtains the mechanical angle and the count value from the sensor section, and an absolute angle calculator that calculates an absolute angle based on the mechanical angle and the count value. Where one rotation of the motor is divided into indefinite regions and definite regions, the absolute angle calculator uses the count value from the definite regions to calculate the absolute angle.

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: An ECU includes plural sensor units and plural control units. The sensor units include magnetic field detection elements for detecting a rotation of a motor, and output mechanical angles related to the rotation angle in one rotation and count values related to the number of rotations of the motor, respectively. One rotation of the motor is divided into indefinite regions, in which detection deviation of the count values may occur, and definite regions, in which no detection deviation occurs. The definite region of the count value is set to deviate from the definite region of the other count value. Absolute angle calculation units calculate the absolute angles using the count values of the definite regions.

Abstract: An electronic device includes: a wiring board; an electric connection wiring connected to a power supply; motor connection wirings arranged on a peripheral side of the wiring board and connected to the electric motor; and semiconductor modules having semiconductor elements and a resin mold. The semiconductor modules are arranged at a position on the electric connection wiring or on the peripheral side of the electric connection wiring and on a center side of the motor connection wiring. At least a part of electrodes of the plurality of semiconductor modules is mounted on the electric connection wiring.