Patent ID: 7733615
Filing Date: 2010-06-08
Classification: H02P

Abstract:
1. A dynamic braking load analyzer for determining a braking resistance value for a variable frequency drive or servo-drive, said analyzer comprising: a positive bus line and a negative bus line operable to be electrically coupled to the variable frequency drive; a resistor bank including a plurality of resistors electrically coupled in parallel to the positive line and the negative line, said resistor bank further including a plurality of resistor switches electrically coupled between the resistors in the resistor bank for selectively switching the resistors into a resistor circuit; a multi-position selector switch for selectively closing the resistor switches so as to determine which of the resistors will be switched into the resistor circuit and be electrically coupled to the variable frequency drive; a temperature sensing device for sensing the temperature of the resistor bank; and a temperature meter for reading the temperature of the temperature sensing device, wherein the selector switch is positioned to change the resistance value of the resistor circuit and the temperature of the resistor circuit so as to identify the proper resistance value for providing dynamic braking of the variable frequency drive or servo-drive.