US 9,531,304 B2 · Method and device for operating an electrical machine having separate excitation

Abstract

A method and a device for operating an electrical machine having separate excitation, especially a synchronous machine. With the aid of a sensor system, a variable characterizing a rotor temperature and/or a stator temperature are/is determined, and an excitation current and stator currents for the electrical machine are specified by a control unit as a function of the variable characterizing the rotor temperature and/or the stator temperature, at least in specifiable operating ranges.

Claims13

Dependent claims

A method for operating an electrical machine having separate excitation, the method comprising:

determining a variable that characterizes a stator temperature;
and
shifting a current distribution between an excitation current and stator currents for the electrical machine at least in specifiable operating ranges, as a function of the variable characterizing the stator temperature,
wherein in a first operating range, in which the stator temperature lie(s) below a specifiable first limit value, the excitation current and the stator currents for a specified working point of the electrical machine, which is defined by a torque and an engine speed, are specified in efficiency-optimized manner independently of the stator temperature.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

13/990,898Filed 30 Sep 2011

Priority

DE 10 2010 062 3382 Dec 2010

Published

US 2014/0125268 A18 May 2014

Granted

27 Dec 2016

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

H02P 29/666
The rotor having windings: by rotor current detection
G05D 23/20
Characterised by the use of electric means: with sensing elements having variation of electric or magnetic properties with change of temperature
H02P 9/30
Using discharge tubes or semiconductor devices: using semiconductor devices
H02P 9/48
Arrangements for controlling electric generators for the purpose of obtaining a desired output: arrangements for obtaining a constant output value…

Method and device for operating an electrical machine having separate excitation

Life of this patent

Method and device for operating an electrical machine having separate excitation

Life of this patent

Abstract

Claims13