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| Number | Title | Issue Date |
| 8159162 | Motor control apparatus, vehicle fan drive apparatus, and motor control method A motor control apparatus has a start control section. When the motor control apparatus receives a motor start command from a host control unit when a motor is in a stop state or a low-speed rotating state where a sensorless control cannot be applied, the control se... | 04/17/2012 |
| 7746013 | Method and device for controlling a brushless direct-current motor Presented in an apparatus for controlling a brushless DC motor with a permanent magnet arranged on a rotor and a stator with windings. The apparatus includes an observer that is adapted to determine an estimated temperature of the permanent magnet as a function of t... | 06/29/2010 |
| 7423395 | Sensorless vector control method for alternating-current motor and control apparatus therefor It is the objective of the present invention to provide a sensorless vector control method and a control apparatus, for an alternating-current motor, that can smoothly restart an alternating-current motor in the free running state. According to the present in... | 09/09/2008 |
| 7170256 | Motor control device In the control of a synchronous motor having a permanent magnet, an alternating current power supply voltage that is input to a power amplifier or a direct current link voltage of which input voltage is rectified is measured. A reactive current (a d-axis current) or... | 01/30/2007 |
| 7166978 | Motor temperature sensor system and method to determine motor performance An electric motor system includes an electric motor, a temperature sensor mounted therein capable of measuring a local temperature and generating a temperature related signal, and a processor configured to calculate an actual temperature of a rotor magnet from the t... | 01/23/2007 |
| 7071649 | Active temperature estimation for electric machines A method and system for estimating a temperature of an electric machine comprising obtaining a temperature value responsive to a temperature signal from a temperature sensor, the temperature sensor is operatively connected to and transmitting the temperature signal ... | 07/04/2006 |
| 7068008 | Electronic device for controlling a discharge pump driven by a synchronous electric motor with a permanent-magnet rotor The present invention relates to an electronic device (10) for controlling a discharge pump, driven by a synchronous electric motor with a permanent-magnet rotor (3) and of the type comprising at least a controller (1) receiving at its input a s... | 06/27/2006 |
| 4291263 | Amortisseur winding protection system This invention relates to a system for protecting an amortisseur winding during the starting of a synchronous motor. The system compares the actual slip frequency of the accelerating motor with predetermined slip frequencies. These predetermined slip freq... | 09/22/1981 |
