Dynamic braking load analyzer
US7733615B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2008 |
| Grant date | Jun 8, 2010 |
| Priority date | — |
| Expiry date | Dec 18, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P3/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dynamic braking load analyzer that determines the proper resistance value for a dynamic braking load resistor to be used in combination with a variable frequency drive or servo-drive to accommodate the power dissipated from an induction motor when it is being reduced in speed. The analyzer includes a resistor bank having a plurality of resistors electrically coupled in parallel. Switches are provided between the resistors, and a resistor selector switch determines which resistors are switched into the resistor bank circuit. A heat sensing resistor in the resistor bank measures the heat generated by the resistors and provides a signal that is read by a heat meter. The combination of the temperature measurement and the resistance of the resistors in the circuit gives the proper braking resistance value for the deceleration of the induction motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.