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:
Aug. 28, 1990
Filed:
Jan. 12, 1989
Applicant:
Inventors:
Pierre Periou, Cergy Pontoise, FR;
Jean Dauvergne, Fosses, FR;
Assignee:
Rockwell-CIM, , FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318257 ; 318778 ;
Abstract
A motor control devise including an auxiliary resistor in series with the motor, a relay, including a coil for activation thereof for shorting the resistor, voltage terminals for determining the current in the auxiliary resistor and the voltage in the supply line, a microprocessor programmed to calculate the sum of the resistance of the supply line and the internal motor resistance, a time delay in energizing the relay for shorting the resistor immediately after the calculation of the resistances, and wherein the microprocessor is programmed to calculate instantaneous values of speed and torque of the motor.