According to one embodiment, a control device detects a field current in a rotary electrical machine, estimates a rate of rotation of a rotor of the machine based on the detected current, obtains a field voltage in the machine based on a difference between the estimated rate of rotation and a target rate of rotation, and controls the switching of an inverter based on the field voltage such that the rate of rotation follows the target rate of rotation. A permanent magnet using the machine is an R—Co permanent magnet containing 25 to 40 at % iron. The control device performs field-weakening control by increasing and decreasing the field voltage based on a negative-field current in accordance with the rate of rotation by a material of the permanent magnet.
Rotary electrical machine system, drive unit for rotary electrical machine, method for driving rotary electrical machine and vehicle
2018-10-16
Patent
Elektronische Ressource
Englisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02K Dynamoelektrische Maschinen , DYNAMO-ELECTRIC MACHINES / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern |
Europäisches Patentamt | 2017
|ROTARY ELECTRICAL MACHINE AND VEHICLE PROVIDED WITH ROTARY ELECTRICAL MACHINE
Europäisches Patentamt | 2020
|Rotary electrical machine and vehicle provided with rotary electrical machine
Europäisches Patentamt | 2016
|Rotary Electrical Machine, and Rotor for Rotary Electrical Machine
Europäisches Patentamt | 2016
|ROTARY ELECTRICAL MACHINE, AND ROTOR FOR ROTARY ELECTRICAL MACHINE
Europäisches Patentamt | 2018
|