Patent application number | Description | Published |
20090122489 | Electronic control device and method of manufacturing electronic control device - Provided is an electronic control device, including: a housing ( | 05-14-2009 |
20090250289 | ELECTRIC POWER STEERING DEVICE - Provided are an electric power steering device which is capable of determining a failure without using a motor current, and an electric power steering device which removes any motor current detecting unit for detecting the motor current such as a shunt resistor, and suppresses the heat generation and the power loss in the device, thereby making it possible to realize the downsized device, a reduction in the costs, and the higher efficiency. An electric power steering device according to the present invention includes: a motor coupled with a steering system; a drive control unit for controlling a drive of the motor; a motor impression voltage detecting unit for detecting an applied voltage of the motor; and an abnormality determining unit for determining abnormality based on a comparison result of the detected motor impression voltage and an output voltage of the drive control unit. | 10-08-2009 |
20090254252 | ELECTRIC POWER STEERING CONTROL APPARATUS - Provided is an electric power steering control apparatus for an electric power steering system equipped with a torque sensor for detecting a steering torque of the steering system and a motor for generating a torque for assisting the steering torque, including a motor target torque calculation unit for calculating a torque of the motor in response to a steering torque signal from the torque sensor and a motor-applied voltage calculation unit for calculating a voltage applied to the motor in response to a motor target torque signal from the motor target torque calculation unit, in which the motor target torque calculation unit generates the motor target torque signal indicating a motor target torque whose ratio to a steering torque indicated by the steering torque signal is set such that an influence of a torque fluctuation of the motor on a driver becomes equal to or smaller than a predetermined value. | 10-08-2009 |
20100222968 | STEERING CONTROL APPARATUS - A steering control apparatus is obtained which can achieve a sophisticated control function and redundancy of a motor output torque control unit with a simple construction. The apparatus includes a motor | 09-02-2010 |
20110221481 | GATE DRIVE CIRCUIT - Provided is a gate drive circuit capable of turning off a MOS-FET reliably without adding a complicated structure. The gate drive circuit for driving a power MOS-FET includes: a first switching element connected to a gate terminal of the power MOS-FET through a first resistor, for setting a gate potential of the power MOS-FET to a potential for turning on the power MOS-FET, based on a signal from a signal source; and a second switching element connected to the gate terminal of the power MOS-FET through a second resistor, for setting the gate potential of the power MOS-FET to a potential for turning off the power MOS-FET, based on the signal from the signal source, in which the first resistor has a resistance value set to a value larger than a resistance value of the second resistor. | 09-15-2011 |
20110241579 | CONTROLLER FOR AC ROTARY MACHINE AND CONTROLLER FOR ELECTRIC POWER STEERING - A storage section stores three-phase detection currents and outputs them as three-phase storage detection currents and also stores three-phase voltage commands and outputs them as three-phase storage voltage commands. A second voltage command calculating section outputs three-phase voltage commands on the basis of the three-phase storage detection currents and the three-phase storage voltage commands, which are acquired from the storage section, and the three-phase detection currents acquired from a current detecting means. A voltage command output means outputs, to a voltage application means, three-phase voltage commands acquired on the basis of the three-phase voltage commands from the storage section and the three-phase voltage commands from the second voltage command calculating section. The voltage application means applies a voltage to an AC rotary machine on the basis of the three-phase voltage commands from the voltage command output means. | 10-06-2011 |
20110264330 | ELECTRIC POWER STEERING APPARATUS - An electric power steering apparatus includes an rotating AC machine which generates an auxiliary torque for assisting a steering torque of a steering system; and a controller which performs control so that the allowed electric current amplitude of the rotating AC machine becomes large if a rotational speed of the rotating AC machine is increased. Accordingly, it is possible to release or lessen the limit on the number of repetitions or continuous time of the “stationary steering” or the “end contact”. | 10-27-2011 |
20120057381 | ELECTRIC-POWER CONVERSION APPARATUS - There is provided an electric-power conversion apparatus including a chopper circuit; a current sense resistor that detects the output current of the chopper circuit; a differential detection circuit that outputs, as a differential detection signal (vo), the electric potential difference across the current sense resistor; and a calculation means that corrects the differential detection signal (vo) from the differential detection circuit by use of a control signal (D | 03-08-2012 |
20120273290 | MOTOR CONTROL DEVICE - Provided is a motor control device including a main calculation unit ( | 11-01-2012 |
20120296525 | STEERING CONTROLLER - In a steering control device, a road surface reaction force torque calculation module ( | 11-22-2012 |
20130014583 | ANGLE DETECTION METHOD WITH RESOLVERAANM KIMPARA; YoshihikoAACI Chiyoda-kuAACO JPAAGP KIMPARA; Yoshihiko Chiyoda-ku JPAANM HORI; YasuakiAACI Kobe-shiAACO JPAAGP HORI; Yasuaki Kobe-shi JPAANM MORI; TatsuyaAACI TokyoAACO JPAAGP MORI; Tatsuya Tokyo JPAANM KIFUKU; TakayukiAACI Chiyoda-kuAACO JPAAGP KIFUKU; Takayuki Chiyoda-ku JPAANM OKANOUE; TakahiroAACI TokyoAACO JPAAGP OKANOUE; Takahiro Tokyo JP - In an angle detection method with a resolver, the method being for detecting a rotational angle of a rotator by synchronously detecting a first signal and a second signal that are two phase sine wave modulation signals obtained from a one phase excitation/two phase output resolver, the method includes: a first signal detection process which detects a signal in the order of the first signal and the second signal; and a second signal detection process which detects a signal in the order of the second signal and the first signal. | 01-17-2013 |
20140058630 | ELECTRIC POWER STEERING CONTROL DEVICE - Provided is a control device for an electric power steering device, for controlling an output torque of a motor for outputting an assist torque based on a steering-torque signal from a torque sensor for detecting a steering torque, the control device for negatively feeding back a correction signal based on a motor-speed signal from motor-speed detection means for detecting a rotation speed of a rotary shaft of the motor to damp a vibration at a natural frequency determined in accordance with a transfer characteristic from the steering-torque signal to the output torque. | 02-27-2014 |
20140316733 | ANGLE DETECTING APPARATUS - An angle detecting apparatus is obtained. The angle detecting apparatus is capable of correcting an electrical angle frequency component of an angle signal contained angle signal. An angle detecting apparatus computes an angle signal of a rotary machine from a sine signal and a cosine signal obtained from the angle signal. Offset correction values for the sine signal and the cosine signal are computed from the angle signal. The computed offset correction value for the sine signal is added to the sine signal to correct the sine signal, and the computed offset correction value for the cosine signal is added to the cosine signal to correct the cosine signal. | 10-23-2014 |