Abstract: A permanent magnet-type rotary electric machine includes a stator, a first rotor, and a second rotor. The stator includes a stator core, a plurality of stator teeth, a plurality of stator slots, a plurality of stator magnets, and a stator coil. The first rotor is disposed inside the stator core relative to the plurality of stator magnets. The second rotor is disposed inside the stator core relative to a plurality of first pole pieces. The second rotor includes a plurality of second pole pieces. A proportion of the number of the plurality of stator slots to the number of poles of the plurality of second pole pieces of the second rotor is greater than 1.25 and less than 1.5, or greater than 1.5 and less than 3.0.

Abstract: Provided is a magnetic strain wave gear device that makes it possible to achieve both improvement of the efficiency of assembly work and suppression of decrease in energy conversion efficiency. A magnetic strain wave gear device includes: a stator having a stator core, a stator winding, and a stator magnet; a first rotor; and a second rotor. The second rotor includes a second rotor core provided with a plurality of rotor magnet insertion holes and a plurality of rotor magnets inserted into the plurality of respective rotor magnet insertion holes. The first rotor includes a cylindrical first rotor core and a first rotor end plate. The first rotor end plate has a rotor magnet passage hole through which the rotor magnets can be inserted into the rotor insertion holes from outside in a direction of a rotation shaft.

Abstract: A parking assist apparatus according to an embodiment includes a memory and a hardware processor coupled to the memory. The hardware processor: sets a first circumference being in contact with a first straight line extending in a traveling direction of a vehicle and passing through a position of the vehicle; sets a second circumference being in contact with a second straight line extending in an exit direction from a parking target area of the vehicle and passing through the parking target area; sets a third circumference obtained by shifting the second circumference along the second straight line until the second circumference comes in contact with the first circumference; acquires a guidance route including part of the first circumference as a route for moving the vehicle forward and part of the third circumference as a route for moving the vehicle backward; and guides the vehicle along the acquired guidance route.

Abstract: A parking assist device according to an embodiment includes: a peripheral image generation unit configured to generate a peripheral image representing conditions around a vehicle based on an imaging result of an imaging unit provided to the vehicle; a parking region acquisition unit configured to acquire a parking region where the vehicle is parkable; a display processing unit configured to display the peripheral image on a display device including a touch panel, and display a first symbol representing the parking region on the peripheral image; and an assist processing unit configured to start, when a position corresponding to the first symbol on the touch panel is touched, parking assist control for assisting parking at the parking region represented by the first symbol.

Abstract: A parking assist device according to an embodiment includes: a peripheral image generation unit configured to generate a peripheral image representing conditions around a vehicle based on an imaging result of an imaging unit provided to the vehicle; a parking region acquisition unit configured to acquire a parking region where the vehicle is parkable; a display processing unit configured to display the peripheral image on a display device including a touch panel, and display a first symbol representing the parking region on the peripheral image; and an assist processing unit configured to start, when a position corresponding to the first symbol on the touch panel is touched, parking assist control for assisting parking at the parking region represented by the first symbol.

Abstract: According to one embodiment, a position estimation device includes an acquirer that acquires wheel rotation information as information on rotation of wheels of a mobile structure and object information on an object, and an estimator that estimates a position of the mobile structure by calculating a directional deviation of a mobile structure as change in a direction of the mobile structure from the wheel rotation information and a predetermined direction parameter and calculating the direction of the mobile structure from the directional deviation of the mobile structure, and corrects the direction parameter on the basis of the directional deviation of the mobile structure and an object directional deviation as variation in a direction of the object relative to the mobile structure by calculating the object directional deviation from the object information.

Abstract: At a time when it is possible for a user's own vehicle to pull out from a parking space, an assist control unit of a parking exit assist device terminates an assist control in the event that the user's own vehicle has traveled forward by a predetermined distance (a minimum forward distance) from a predetermined position (a most recent intermediate position or an assist starting position).

Abstract: A parking support apparatus according to an embodiment includes: a memory configured to store in advance a plurality of movement routes having different turning radii of a vehicle; and a hardware processor coupled to the memory, the hardware processor being configured to: select one movement route from the plurality of movement routes based on magnitude of difference between a direction of the vehicle to a target position at a turning-back position where the vehicle turns back and a direction of the vehicle to the target position when the vehicle is positioned on the movement route; and move the vehicle based on the selected movement route.

Abstract: A driving assist system includes: a first detection unit configured to detect first rotational information that is information about rotation of a left wheel of a vehicle; a second detection unit configured to detect second rotational information that is information about rotation of a right wheel of the vehicle; and a processing unit configured to estimate a running turning radius of a running turning circle on a running route on which the vehicle drives from the first rotational information and the second rotational information.

Abstract: A parking support apparatus according to an embodiment includes: a hardware processor being configured to: calculate, when turning-back is performed for a vehicle to enter a parking frame, a steering angle such that a position of a turning center of the vehicle is, along a first direction that is vertical to a going-in direction of the vehicle with respect to the parking frame, more away from the parking frame than an outer edge that is opposite to an advancing direction of the vehicle on a turning-back position of the vehicle is; acquire, based on the calculated steering angle and the turning-back position, a moving path of the vehicle; and provide stationary steering control, based on the acquired moving path, in which the vehicle is steered while being stopped, so as to allow the vehicle to move.

Abstract: The parking assistance apparatus of an embodiment includes: a memory; and a hardware processor coupled to the memory and configured to acquire a movement route to a target position when a steering angle of a vehicle is a given steering angle. The memory stores, with respect to individual steering angles other than the given steering angle, information representing a route where the vehicle is movable to a position included in the movement route by performing steering angle control beginning at the corresponding steering angle. The hardware processor acquires a steering angle of the vehicle, and calculates, based on the acquired steering angle, a corrected movement route to the target position by correcting the movement route with a route where the vehicle is movable to a position included in the movement route at the acquired steering angle in accordance with information representing the route stored in the memory.

Abstract: A parking assist apparatus according to an embodiment includes a memory and a hardware processor coupled to the memory. The hardware processor: sets a first circumference being in contact with a first straight line extending in a traveling direction of a vehicle and passing through a position of the vehicle; sets a second circumference being in contact with a second straight line extending in an exit direction from a parking target area of the vehicle and passing through the parking target area; sets a third circumference obtained by shifting the second circumference along the second straight line until the second circumference comes in contact with the first circumference; acquires a guidance route including part of the first circumference as a route for moving the vehicle forward and part of the third circumference as a route for moving the vehicle backward; and guides the vehicle along the acquired guidance route.

Abstract: A brushless motor device including: a rotor; a stator including a first coil, a second coil and a third coil, first ends of which are Y-connected to each other; a motor driver including an inverter circuit including switching elements and configured to: switch ON and OFF states of each switching element of the inverter circuit, wherein by switching the ON and OFF states of each switching element of the inverter circuit, the motor driver is configured to switch an energization time period from a first time period in which current is caused to flow from the first coil to the third coil to a second time period in which current is caused to flow from the second coil to the third coil and set both voltages of second ends of the second coil and the third coil to a power supply voltage during the second time period.

Abstract: A brushless motor device configured to: determine a first upper limit of a current value which flows through a coil when a rotation speed of a rotor is accelerated from a first speed to a second speed, wherein, in a case where the current value of the first upper limit flows through the coil when the rotor is rotated at the second speed, a first time period, which is from a start of a non-energization time period of the coil until an induced voltage reaches a threshold value, is longer than a second time period, which is from the start of the non-energization time period until a counter-electromotive voltage becomes zero; and change switching of each switching element of an inverter circuit by using a second upper limit greater than the first upper limit and the first upper limit.

Abstract: An image forming apparatus includes a controller, wherein the controller execute first control of controlling a rotational frequency of the motor based on a light receiving signal, wherein, when the target rotational frequency changes from a first rotational frequency to a second rotational frequency that is lower than the first rotational frequency, the controller executes speed change control of: stopping execution of the first control; and changing a rotational frequency of the motor, and non-lighting period change control of changing the non-lighting period in the lighting control from a first non-lighting period corresponding to the first rotational frequency to a second non-lighting period corresponding to the second rotational frequency, and the controller starts the first control in response to satisfying a condition where the deflection period of the mirror obtained based on a position signal of a rotor of the motor is longer than the second non-lighting period.

Abstract: In a brushless motor apparatus, a brushless motor has a rotor and Y-connected coils, and a controller has an inverter circuit selectively driving the coils. The controller detects an induced voltage generated in a specific coil which is not driven by the inverter circuit while the rotor rotates. The controller acquires a positional signal of the rotor on a basis of a timing at which the induced voltage reaches the reference value. The timing is obtained through comparison between the detected induced voltage and a reference value. The controller switches a coil driven by the inverter circuit on a basis of the positional signal, and sets a mask period on a basis of a result of comparison between voltage of the specific coil and a coil other than the specific coil. The comparison between the induced voltage and the reference value is not executed in the mask period.

Abstract: According to one embodiment, a position estimation device includes an acquirer that acquires wheel rotation information as information on rotation of wheels of a mobile structure and object information on an object, and an estimator that estimates a position of the mobile structure by calculating a directional deviation of a mobile structure as change in a direction of the mobile structure from the wheel rotation information and a predetermined direction parameter and calculating the direction of the mobile structure from the directional deviation of the mobile structure, and corrects the direction parameter on the basis of the directional deviation of the mobile structure and an object directional deviation as variation in a direction of the object relative to the mobile structure by calculating the object directional deviation from the object information.

Abstract: According to one embodiment, a parking assist device includes a detector configured to detect a target parking position from a captured image obtained from an imager; a position identifier that identifies, during a period while the vehicle is moving after the captured image was displayed on the display device and before a captured image captured next by the imager is displayed, the target parking position with respect to a current position of the vehicle, based on a first moving amount by which the vehicle has moved since the captured image was displayed on the display device and on a positional relation between the vehicle and the target parking position at the time when the captured image was captured; and a parking assist unit that guides the vehicle during the period based on the identified target parking position when a request for guiding the vehicle to the target parking position is made.

Abstract: A driving assist system includes: a first detection unit configured to detect first rotational information that is information about rotation of a left wheel of a vehicle; a second detection unit configured to detect second rotational information that is information about rotation of a right wheel of the vehicle; and a processing unit configured to estimate a running turning radius of a running turning circle on a running route on which the vehicle drives from the first rotational information and the second rotational information.

Abstract: A parking assist device according to an embodiment includes: a peripheral image generation unit configured to generate a peripheral image representing conditions around a vehicle based on an imaging result of an imaging unit provided to the vehicle; a parking region acquisition unit configured to acquire a parking region where the vehicle is parkable; a display processing unit configured to display the peripheral image on a display device including a touch panel, and display a first symbol representing the parking region on the peripheral image; and an assist processing unit configured to start, when a position corresponding to the first symbol on the touch panel is touched, parking assist control for assisting parking at the parking region represented by the first symbol.