Patent application number | Description | Published |
20080302628 | SHIFT RANGE CONTROL APPARATUS - A rod-lock mechanism is provided in an automatic transmission for a vehicle. The rod-lock mechanism has an engaging pin which will be engaged with a rod when the rod is in its initial position, so as to hold the rod in its initial position. The rod-lock mechanism further has an electric actuator for driving the engaging pin when electric power is supplied, so that the engaging pin is brought out of engagement from the rod. A forced parking current supply unit controls electric power supply to the electric actuator. When the electric power is supplied to the electric actuator, the rod is moved in a direction of a parking position to bring a vehicle into a parking condition. | 12-11-2008 |
20090039822 | Position detecting apparatus having electric motor and method for detecting position - A reference position detecting apparatus includes an electric motor and a motor control unit. The electric motor includes a plurality of first coils and a plurality of second coils. The electric motor further includes a rotor that rotates when at least one of the plurality of first coils and the plurality of second coils is supplied with electricity. The motor control unit controls electricity supplied to either one of the plurality of first coils and the plurality of second coils to rotate the rotor to a limit position in a movable range of an object. | 02-12-2009 |
20090058208 | ELECTRIC MOTOR AND AN ACTUATOR HAVING THE SAME - In an electric motor of an SBW actuator, a rotor shaft is rotated upon energization of the motor. A rotor core is rotated integrally with the rotor shaft. A resilient member enables tilting or decentering of the rotor shaft upon application of a decentering force on the rotor shaft. A stator core contacts the rotor core when the rotor shaft is tilted or decentered. | 03-05-2009 |
20090108791 | MOTOR CONTROL APPARATUS - At an initial drive operation after turning on of an electric power source, an ECU sequentially changes each current exciting phase among multiple phases through one complete cycle at a predetermined time schedule, so that a rotational position of a rotor and the corresponding exciting phase coincide with each other at some timing during the initial drive operation, and thereby the rotor is rotated. The ECU counts the A-phase signal and the B-phase signal during the rotation of the rotor in the initial drive operation and learns a relationship among a count value of the A-phase signal and the B-phase signal, a rotational position of the rotor and each exciting one of the plurality of phases at an end of the initial drive operation. When the ECU determines that a result of the learning is erroneous, the ECU re-executes the learning by re-executing the initial drive operation. | 04-30-2009 |
20090140599 | ROTATING MACHINE - A thin plate | 06-04-2009 |
20100052595 | Position detecting apparatus having electric motor and method for detecting position - A reference position detecting apparatus includes an electric motor and a motor control unit. The electric motor includes a plurality of first coils and a plurality of second coils. The electric motor further includes a rotor that rotates when at least one of the plurality of first coils and the plurality of second coils is supplied with electricity. The motor control unit controls electricity supplied to either one of the plurality of first coils and the plurality of second coils to rotate the rotor to a limit position in a movable range of an object. | 03-04-2010 |
20100170355 | ROTARY ACTUATOR AND MANUFACTURING METHOD OF THE SAME - An electric motor drives and rotates a rotor shaft, and a speed reducer reduces speed of rotation of the rotor shaft and outputs the rotation. A shaft is fixed to a front housing. A turning member is meshed with an external teeth member provided to an output shaft of the speed reducer and is supported to be able to rotate around an axis line of the shaft. A turning angle sensor senses a turning angle of the turning member by sensing a magnetic field corresponding to a turning angle of a magnet section provided to the turning member. An outer wall of a cup is fixed to the turning member, and an inner wall of the cup is fitted to a ball bearing. A plate is provided slidably between a bottom outer wall surface of the cup and an end surface of the front housing around the shaft. | 07-08-2010 |
20110263373 | ROTARY ACTUATOR - A sun gear is supported by an eccentric portion of a rotor via a bearing and rotatable eccentrically to the rotor axis. A ring gear includes inner teeth via which the ring gear is meshed with outer teeth of the sun gear. An output shaft is located adjacent to the sun gear in the axial direction. A fitted portion of the output shaft is loosely fitted to a fitting portion of the sun gear to transfer rotation of the sun gear to the output shaft. The bearing has a center position located in a fitting overlap region between the fitting portion of the sun gear and the fitted portion of the output shaft in the axial direction and/or located in a gear overlap region between the outer teeth of the sun gear and the inner teeth of the ring gear which are meshed with the outer gear. | 10-27-2011 |