The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 29, 1991
Filed:
May. 29, 1990
Leonhard Reng, Herzogenaurach, DE;
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Abstract
A method for the formation of the actual load angle value for a field-oriented regulated rotary field machine and apparatus for field-oriented regulation of the machine. In order to impress in a voltage-impressing converter the load angle, i.e. the angle between field axis and stator current vector, an angle regulator is used to which a given nominal load angle value (wif*) is supplied. In order to form from the stator-oriented acutal current angle (wis) tapped off at the machine via a current detector (I-DET) the actual load angle value associated the nominal load angle value with wif*, by a decoupling computing unit (CAL) from the given components of the field-oriented nominal current vector, the field-oriented angle (wuf*) of the associated field-oriented nominal voltage vector is calculated and subtracted from the stator-oriented angle (wus) of the actual voltage vector. The actual load angle value (wif) is then given by wis-wus+wuf*. The output signal of the angle regulator (W-REG) and the decoupling computing unit (CAL) form the input quantities of the trigger unit for a voltage-impressing converter (PWR) feeding the machine at which the stator-oriented voltage angle (wus) can be tapped off.