Patent application number | Description | Published |
20130257232 | MOTOR DRIVE APPARATUS - A motor drive apparatus includes a rear end frame between a motor case and a control unit case. A shaft of a motor unit is supported rotatably by a bearing fixed to the rear end frame. A first socket-spigot fitting surface formed on the rear end frame is fitted with a second socket-spigot fitting surface formed on a heat sink. A rotation angle sensor mounted on a control unit substrate attached to the heat sink is provided on the rotation axis of the shaft. The rotation angle sensor can thus accurately detect the magnetic field of a magnet provided at the end of the shaft. | 10-03-2013 |
20130342066 | ROTOR, DYNAMO-ELECTRIC MACHINE HAVING THE ROTOR AND ROTOR MANUFACTURING METHOD - A cover is configured into a tubular form and is fitted to a radially outer surface of each of projections of a rotor core and a radially outer surface of each of permanent magnets. A circumferential center portion of the radially outer surface of each projection contacts a radially inner surface of the cover. Circumferential end portions of the radially outer surface of each projection are radially inwardly spaced from the radially inner surface of the cover. | 12-26-2013 |
20140021831 | ELECTRIC MOTOR - A rear frame has a fastening portion, which radially extends from an outer peripheral surface of the rear frame and receives a fastening force of a through bolt. A circuit board, which includes a control circuit, is installed to an axially outer surface of a main body of the rear frame. A reinforcing portion is provided in the fastening portion to limit deformation of the main body of the rear frame, which is induced by the fastening force of the through bolt. | 01-23-2014 |
20140097776 | ROTARY ELECTRIC MACHINE CONTROL APPARATUS AND ELECTRIC POWER STEERING APPARATUS USING THE SAME - A control unit controls driving of a motor by controlling a first inverter unit and a second inverter unit, specifically by controlling on/off operations of FETs. The control unit functions as an abnormality detection device. The control unit detects a short-circuit abnormality between a first winding set and a second winding set or between the first inverter unit and the second inverter unit, before starting to control driving of the motor, based on phase current values detected by current detectors when a high-side FET of the first inverter unit and a low-side FET of the second inverter unit are turned on. | 04-10-2014 |
20140125173 | ROTATING ELECTRIC MACHINE - The rotating electric machine has a motor case, a stator, a winding wire, a wire extension, a rotor, a shaft, a first plate, a second plate, a control unit, and a tubular bush. The first plate seals a first end of the motor case and supports a first end of the shaft. The second plate seals a second end of the motor case, supports a second end of the shaft, and has a through-hole. The control unit is positioned on an opposite side of the second plate that is opposite to the motor case. The control unit is connected with the wire extension to control electricity supplied to the winding wire. The tubular bush is disposed inside the through-hole, or is disposed outside the through-hole between the winging wire and the second plate. | 05-08-2014 |
20140145564 | ROTARY ELECTRIC MACHINE - A housing and a rotary shaft of a motor are formed of non-magnetic material. A soft magnetic member is provided between a first axial end surface of a fixed core and a bearing. The soft magnetic member is provided on the fixed core side relative to the first bearing thereby to suppress magnetic flux leaking to a vicinity of one end part of the rotary shaft by leading the magnetic flux, which is generated from a rotor, to the rotor core through the fixed core and a casing. A magnetic angular position sensor fixed to one end part of the rotary shaft can detect a magnetic angular position of the rotor accurately without being affected by external magnetic field. As a result, noise generated by vibration of the motor can be suppressed. | 05-29-2014 |
20150162789 | ROTOR AND DYNAMO-ELECTRIC MACHINE HAVING THE SAME - Each permanent magnet provided in a rotor includes a projection that projects toward a corresponding predetermined portion of the rotor core. An inner peripheral surface of each permanent magnet, which is radially opposed to the corresponding predetermined portion of the rotor core, includes a primary contacting portion and two primary non-contacting portions. The primary contacting portion contacts the corresponding predetermined portion of the rotor core at a circumferential location, which corresponds to the projection. The primary non-contacting portions do not contact the rotor core and are located on two circumferentially opposite sides, respectively, of the primary contacting portion. | 06-11-2015 |
20150236570 | ROTATIONAL ELECTRIC MACHINE - A stator is disposed inside a motor case having a cylindrical shape. A winding wire is wound around the stator. A rotor is rotatably disposed inside the stator. A shaft is disposed in a rotational center of the rotor. A first plate covers one side of the motor case. The first plate rotatably supports one end portion of the shaft. A second plate has an insert hole extending in a thickness direction of the second plate. The second plate covers an other side of the motor case and rotatably supports an other end portion of the shaft. A wire extending portion has one end electrically connected to the winding wire. The wire extending portion extends from the winding wire and is inserted into the insert hole. A controller is disposed on a side of the second plate opposite to the motor case. The controller includes a substrate and is electrically connected to an other end of the wire extending portion at a side of the substrate opposite to the second plate to control energization to the winding wire. | 08-20-2015 |
20150326166 | CONTROL DEVICE FOR MULTI-PHASE AC MOTOR - A control device for controlling a multi-phase AC motor generating a steering assist torque in an electric power steering device of a vehicle, includes: first and second inverters in first and second systems that output first and second alternating current voltages to first and second multi-phase winding wire sets, respectively; and a control unit that controls a phase difference between the first and second alternating current voltages. The first and second multi-phase winding wire sets provide a stator of the motor, and generate a rotating magnetic field in a rotor. The control unit sets a control range including a reference phase difference, which reduces a specified-order harmonic component, and changes the phase difference within the control range according to a characteristic required of the motor, or so as to cause a fluctuation in the energization of the motor. | 11-12-2015 |
Patent application number | Description | Published |
20090304429 | IMAGE FORMING APPARATUS - There is a provided a curl corrector which corrects a curl formed by a fixer when a duplex image formation mode is selected. The curl corrector is provided in a conveying path other than conveying paths commonly used in a conveying path for multiple image formation and a conveying path for duplex image formation. | 12-10-2009 |
20110091258 | IMAGE FORMING APPARATUS - An image forming apparatus includes an image forming unit configured to form an image on a sheet, a fixing unit configured to fix the image formed by the image forming unit on the sheet, a cooling unit configured to cool the sheet having the image fixed thereon by the fixing unit, a curl amount changing unit configured to change an amount of curl of the sheet by bending the sheet having the image fixed thereon, and a path configured to guide the sheet having the image fixed thereon to the image forming unit, after the sheet is conveyed through the curl amount changing unit and the curl amount changing unit. The curl amount changing unit changes an amount of bending the sheet according to whether the sheet is stopped at the cooling unit or not. | 04-21-2011 |
20150078781 | IMAGE FORMING APPARATUS - An image forming apparatus includes a belt unit capable of being inserted into and pulled out of the apparatus, the belt unit including a movable endless belt, a supporting frame supporting the endless belt and having an accommodating portion, a grip member which is provided on the supporting frame at a position outside the belt in a widthwise direction of the belt crossing with a moving direction of the belt and which is movable between a first position in which the grip member is projected out of the accommodating portion in a direction crossing with the widthwise direction and a second position in which the grip member is accommodated in the accommodating portion, and an urging member configured to urge the grip member in a direction from the second position toward the first position. | 03-19-2015 |
20150086235 | IMAGE FORMING APPARATUS - An image forming apparatus includes; a belt unit detachably mountable to a main assembly, said belt unit including a movable endless belt, a belt supporting roller, a steering unit for swinging the belt to incline relative to the supporting roller by a force produced by movement of the belt in a widthwise direction, and a cleaning unit, supported by the steering unit, for removing and collecting toner from the belt; a toner receiving unit, provided in the assembly, for receiving the toner collected by the cleaning unit; and a path member for guiding the toner collected by the cleaning unit to the toner receiving unit, the path member being supported by the assembly when the belt unit is not mounted, and the path member being supported by the cleaning swingably relative to the toner receiving unit when the belt unit is mounted. | 03-26-2015 |
Patent application number | Description | Published |
20090237628 | OPTICAL REFLECTION DEVICE AND IMAGE PROJECTOR INCLUDNG THE SAME - An optical reflection device includes a mirror adapted to reflect light thereon, a first meander vibration beam supporting the mirror rotatably about the first rotation axis, a movable frame connected to the first meander vibration beam, a second meander vibration beam supporting the movable frame rotatably about a second rotation axis, and a supporter connected to the second meander vibration beam. The first meander vibration beam meanderingly extends along a first rotation axis, and has a first end and a second end opposite to the first end. The movable frame is connected to the second end of the first meander vibration beam. The second meander vibration beam extends meanderingly along the second rotation axis perpendicular to the first rotation axis, and has a third end and a fourth end opposite to the third end. The supporter is connected to the fourth end of the second meander vibration beam. The mirror is coupled to the movable frame only via the first meander vibration beam. This optical reflection device has a large angle by which the mirror rotates about the first rotation axis. | 09-24-2009 |
20100011859 | ANGULAR VELOCITY SENSOR - An angular velocity sensor detects an angular velocity of an object. The angular velocity sensor includes a detecting element, and a driving unit. The detecting element includes a supporting part, a first arm extending from the supporting part and being adapted to be fixed to the object, a second arm extending from the supporting part, and a first weight connected with the second arm. The second arm has substantially a U-shape and includes a first extending part extending from the supporting part, a first facing part facing the first extending part and extending in parallel with the first extending part, and a first joint part joining the first extending part to the first facing part. The first weight is connected with the facing part of the second arm. The driving unit includes first to fourth drivers. The first driver is provided at the first extending part and extends and contracts the first extending part. The second driver is positioned at the first extending part at a more outer circumference of the U-shape of the second arm than the first driver. The second driver extends and contracts the first extending part. The third driver is positioned at the first facing part, and extends and contracts the first facing part. The fourth driver is positioned at the first facing part at a more inner circumference of the U-shape of the second arm than the third driver, and extends and contracts the first facing part. This angular velocity sensor has a small size along a rotation axis about which an angular velocity to be detected. | 01-21-2010 |
20100126270 | INERTIA FORCE SENSOR - An inertial force sensor includes a weight, a first fixing portion linked to the weight, a second fixing portion linked to the weight via the first fixing portion, a first electrode on a first surface of the weight, a second electrode facing the first electrode, and first and second elastic portions elastically deforming so as to displace the weight. The first elastic portion displaces the weight along an X-axis but not along any of a Y-axis and a Z-axis. The second elastic portion displaces the first fixing portion along the Y-axis but not along any of the X-axis and the Z-axis. This inertial force sensor detects an acceleration at high sensitivity. | 05-27-2010 |
20100218604 | ANGULAR VELOCITY SENSOR - Disclosed is an angular velocity sensor for achieving downsizing of a variety of electronic devices. For this purpose, the angular velocity sensor has a subtracter for outputting a first differential signal based on two sensor signals output from a first sensing electrode unit and a second sensing electrode unit, an adder for outputting a first additional signal, another subtracter for outputting a second differential signal based on two sensor signals output from a third sensing electrode unit and a fourth sensing electrode unit, and another adder for outputting a second additional signal. The sensor then detects an angular velocity from an additional signal obtained based on the first differential signal and the second differential signal and a differential signal obtained based on the first additional signal and the second additional signal. | 09-02-2010 |
20100245956 | OPTICAL REFLECTION DEVICE - An optical reflection device includes a flexible substrate, an elastic member provided, an elastic portion connected with an end of the flexible substrate, an optical reflector coupled with the flexible substrate via the first elastic portion, a first electrode layer provided on the flexible substrate, and a piezoelectric layer provided on the first electrode layer. The optical reflection device may have a small size. | 09-30-2010 |
20100296147 | OPTICAL REFLECTION ELEMENT - An optical reflection device includes a mirror having a reflection surface configured to reflect light, a first support beam connected to the mirror, a tuning fork vibrator connected to the first support beam, a second support beam connected to the tuning fork vibrator, and a supporter connected to the second support beam. The first support beam has a first end connected to the mirror and a second end located on an opposite side to the first end, and extends along a center axis. The tuning fork vibrator includes a joining portion connected to the second end of the first support beam, a first arm extending from the first joining portion while separated from the first center axis, and a second arm extending from the first joining portion symmetrically to the first arm about the first center axis. The second support beam has a third end connected to the joining portion of the tuning fork vibrator and a fourth end located on an opposite side to the third end, and extends along the first center axis. | 11-25-2010 |
20110032590 | MEANDERING OSCILLATOR, OPTICAL REFLECTING ELEMENT USING MEANDERING OSCILLATOR, AND IMAGE PROJECTION DEVICE USING MEANDERING OSCILLATOR - A meandering oscillator includes a plurality of oscillating plates bent and coupled in predetermined directions and piezoelectric actuators each including a lower electrode, a piezoelectric body, and an upper electrode stacked on the oscillating plate in this order, and wherein the piezoelectric actuators are alternately arranged on the oscillating plates. Thus, even when an element is made smaller, electrodes can be easily arranged. As a result, the productivity can be improved. | 02-10-2011 |
20110122471 | PIEZOELECTRIC ACTUATOR, OPTICAL REFLECTION ELEMENT USING THE SAME AND PIEZOELECTRIC DRIVER - A first oscillating portion is provided with a first piezoelectric element having a first drive electrode. A second oscillating portion has a central axis different from that of the first oscillating portion and is provided with a second piezoelectric element having a second drive electrode. The first drive electrode and the second drive electrode are connected together. | 05-26-2011 |
20110292479 | OPTICAL REFLECTION ELEMENT - An optical reflection element includes a mirror portion and an oscillator coupled to the mirror portion. The oscillator includes a base, an insulating layer, a drive element, and a monitor element. The insulating layer is formed on the base. The drive element and the monitor element are formed on the insulating layer, and are separated from each other by a separation groove. Each of the drive element and the monitor element includes a lower electrode layer, a piezoelectric layer, and an upper electrode layer formed in that order on the insulating layer. The monitor element has high detection accuracy, allowing the optical reflection element to perform self-excited driving with high accuracy. | 12-01-2011 |
20120033279 | OPTICAL REFLECTION ELEMENT - An optical reflection element has a frame-shaped supporting body, a first oscillator and a second oscillator each having a meander shape, and a mirror portion. A line segment connecting a joining position between the mirror portion and the first oscillator to a joining position between the supporting body and the first oscillator, and a line segment connecting a joining position of the mirror portion and the second oscillator to a joining position of the supporting body and the second oscillator cross a mirror portion central axis. An outer circumference of at least any one of turn portions of the first oscillator and the second oscillator is deviated from a first end portion axis that is parallel to the mirror portion central axis and extends along a first side of the mirror portion. Alternatively, an outer circumference of at least any one of the turn portions of the first oscillator and the second oscillator is deviated from a second end portion axis T | 02-09-2012 |
20120113492 | OPTICAL REFLECTION ELEMENT - An optical reflecting element includes a mirror, and a pair of high-frequency vibrators and a pair of low-frequency vibrators for vibrating the mirror. The high-frequency vibrators include a substrate, a bottom electrode layer formed on the substrate, a piezoelectric layer, and a drive electrode and a first monitor electrode as the top electrode layer. One end of the low-frequency vibrator has the substrate shared with the high-frequency vibrator, a bottom electrode layer, a piezoelectric layer, a drive electrode, and a second monitor electrode as the top electrode layer. The other end of the low-frequency vibrator has the substrate shared with the high-frequency vibrator, a bottom electrode layer, a piezoelectric layer, a drive electrode, a first monitor electrode, and an insulator layer as a dead zone for preventing a piezoelectric effect due to the piezoelectric layer from reaching the first monitor electrode. The first monitor electrode provided on the low-frequency vibrator is connected from the top of the vibrator to an extraction electrode. | 05-10-2012 |