A transmission for a vehicle includes a transmission shift unit that receives a shift command of the vehicle, a driving unit that generates a driving force for causing the transmission shift unit to be switched between positions, and a controller configured to control the driving unit for causing the transmission shift unit to be switched between the positions depending on whether a preset condition is satisfied. In particular, the driving unit includes a first stator to generate magnetic flux, a first rotor including first inner permanent magnets and second inner permanent magnets and configured to be rotated by the magnetic flux transmitted to the first inner permanent magnets, outer permanent magnets, a second rotor disposed between the second inner permanent magnets and the outer permanent magnets, and a clutch unit disposed between the first rotor and the second rotor.

A rotary actuator for a shift-by-wire system of a vehicle includes a motor with a motor shaft, an output shaft disposed in parallel with the motor shaft, a speed-reducing mechanism configured to reduce a rotational speed of the motor and transmit the rotation of the motor to the output shaft, and a case housing the motor and the speed-reducing mechanism. The speed-reducing mechanism includes a first speed-reducing portion including a ring gear and a sun gear, and a second speed reducing portion including a drive gear and a driven gear. The drive gear and the driven gear are coaxially disposed with the motor shaft and the output shaft, respectively, to serve as parallel shafts type gears. The drive gear is disposed between the motor and the first speed-reducing portion in an axial direction of the motor.

An abnormality monitoring apparatus includes a drive circuit unit, a current detection unit, a current cutoff unit, a first control unit, and a second control unit. The drive circuit unit switches an energization to the motor winding. The current detection unit detects a motor current, which is a current flowing through the motor winding. The current cutoff unit cuts off the motor current. The first control unit has an energization control unit for controlling energization to the motor winding and an energization state notification unit for outputting an energization state signal according to an energization command. The second control unit is provided separately from the first control unit and has an abnormality monitoring unit configured to monitor an abnormality based on a detection value of the current detection unit and an energization state signal so as to perform fail-safe measure according to a monitoring result.

A rotary actuator is used in a shift-by-wire system for a vehicle. The actuator includes a motor, an output shaft, a speed reducer, and a case. The motor includes a motor shaft. The output shaft is disposed in parallel with the motor shaft. The case houses the motor and the speed reducer. The case includes an upper case that houses the motor and a lower case that houses the speed reducer. The speed reducer includes a first reducer that includes a ring gear embedded in a resin portion of the lower case and a parallel-shaft type second reducer that includes a drive gear on the motor shaft and a driven gear on the output shaft. The ring gear includes an annular gear portion and a cover that protrudes radially inward from one end of the annular gear portion.

A shift range control device includes: multiple controllers that communicate with each other and control driving of a motor. The multiple controllers share control information, and include a first controller and a second controller. When the control information of the first controller is different from the control information of the second controller, one of the first controller and the second controller is set as a continuation controller, and a different one of the first controller and the second controller is set as a stop controller. The stop controller stops the drive control. The continuation controller performs the drive control of the motor.

A rotary actuator is used in a shift-by-wire system for a vehicle. The actuator includes a motor, a controller, a housing, and a bus bar. The controller controls the motor. The housing holds a stator of the motor and the controller. The bus bar includes a terminal and a holder. The terminal electrically connects a coil of the stator to a control board of the controller. The holder is molded with a part of the terminal. The terminal includes a board-side arm that extends from the holder and a connecting pin that protrudes from the board-side arm toward the control board and that is connected to the control board. The board-side arm includes a stress releasing member that extends along an imaginary plane in parallel with the control board. The stress releasing member includes at least one curved portion at which the stress releasing member is curved or bent.

A shift mechanism configuring an outboard motor comprises: an electric actuator that linearly moves a movable rod; and a shift shaft portion that switches from neutral to forward or reverse based on displacement of said movable rod. Moreover, a neutral adjusting mechanism enabling a neutral position of the shift mechanism to be adjusted is provided facing the shift shaft portion, by a separate body. The neutral adjusting mechanism, which comprises first and second adjusting arms that are supported in a freely rotating manner with respect to a frame and that have been biased in contrary directions to each other by elastic springing force of a coil spring, is provided in a manner that an adjusting screw mounted in the first adjusting arm capable of abutting on a shift arm always abuts on a contacting wall of the second adjusting arm capable of contacting a switch sensor.

A motor control method of a bistable gear shifter, comprising: determining a current required gear according to a position of a shift lever and a gear judgment strategy; determining whether the current required gear is a P gear, an R gear or an N gear; further determining whether the shift lever is in a second steady state position if it is determined that the current required gear is the P gear, the R gear or the N gear; determining whether a deviation of the position of the shift lever from the second steady state position is greater than or equal to a preset angle value, if it is determined that the shift lever is in the second steady state position; and determining a target angle of the motor as a target opening angle, if it is determined that the deviation is greater than or equal to a preset angle value.

In a vehicle including a shift-by-wire (SBW) transmission which may be parked in the neutral gear position of the transmission, method for controlling parking thereof includes determining whether the vehicle is in a situation in which neutral parking is required according to sensor information, when the vehicle is stopped, outputting first information configured to get a confirmation on whether a driver intends to perform the neutral parking from the driver, when the controller concludes that the vehicle is in the situation in which the neutral parking is required and when a park (P) gear position is input or an ignition of the vehicle is turned off, and controlling the SBW transmission to shift to a neutral (N) gear position, when there is an agreement input as a response to the first information.

A motor control method for a shift-by-wire system recognizes a current position of a switched reluctance (SR) motor at a point in time when a shifting request is input as a start position and determines whether the current position of the SR motor is the same as a target position, applies a current for rotating the SR motor toward the target position when the current position and the target position are not the same, counts time until a point in time when an actual motion of the SR motor is sensed, performs advanced-angle control of increasing a rotation speed of the SR motor when the counted time exceeds the time reference value, and measures a current applied to the SR motor and increases the advanced-angle control or performs retarded-angle control of decreasing the rotation speed of the SR motor, depending on the measured current value.