Patent application number | Description | Published |
20120074885 | MOTOR CONTROL DEVICE - PROBLEMS TO BE SOLVED | 03-29-2012 |
20120086375 | MOTOR CONTROL DEVICE - Problems to be Solved | 04-12-2012 |
20130314016 | MOTOR CONTROL DEVICE - A motor control device includes feed-forward control means for detecting a change amount of a predetermined monitoring target, which is used for changing the number of revolutions of a motor without depending on revolution number detecting means, and correcting the number of revolutions recognized by a controller. | 11-28-2013 |
20130320890 | MOTOR CONTROLLER - Phase voltage setting means defines an actual current phase region including a current phase error range based on parameters including an individual difference of at least any one of a motor and an inverter, defines a stable operation current phase region in which a rotor position can be detected through sensorless control, and sets, as a target current, an electric current obtained by adding a predetermined phase difference corresponding to the number of revolutions detected by revolution number detecting means to an electric current set by current vector control such that the actual current phase region is within the stable operation current phase region. | 12-05-2013 |
20130320897 | MOTOR CONTROL DEVICE - It is an object of the present invention to provide a motor control device that can improve stability of sensorless control of a permanent magnetic synchronous motor. Rotor position detecting means ( | 12-05-2013 |
20140028238 | Inverter Device - The present invention includes: an electrolytic capacitor that smoothes a rectified voltage to a direct voltage; an inverter circuit that generates an alternating voltage from the direct voltage, to drive an electric motor; a controlling device that controls drive of switching elements included in the inverter circuit; and a temperature measuring device that measures a temperature of the electrolytic capacitor, to output the measured temperature to the controlling device, in which, when the temperature obtained by the temperature measuring device is lower than a predetermined target temperature, the controlling device supplies the electric motor with a current which is restricted so that a ripple voltage of the direct voltage falls within an allowable range, before starting a normal operation of the electric motor, so that the temperature of the electrolytic capacitor is raised to the target temperature. Thus, the electrolytic capacitor can be used even in a lower-temperature environment. | 01-30-2014 |
20140049201 | Motor Control Device - Proposed is a motor control device that executes rotational control that follows load fluctuations in a startup mode. The proposed motor control device is provided with: detection means | 02-20-2014 |
20140070745 | Applied-Voltage Electrical Angle Setting Method For Synchronous Motor, And Motor Control Apparatus - An applied-voltage electrical angle setting method for a synchronous motor includes detecting applied voltage and current of the synchronous motor M, calculating current peak value Ip based on the detected values while calculating present applied voltage phase α, calculating target current phase βtarg based on the current peak value Ip followed by calculating target applied voltage phase αtarg corresponding to the target current phase in a target value setting unit | 03-13-2014 |
20140347067 | Fault Detection Device For Inverter System - To provide a fault detection device for an inverter system, that detects a fault in the inverter system including an inverter circuit | 11-27-2014 |