Devices for measuring braking torques generated by electromagnetic retarders, and devices for adjusting such torques
US5187433A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 1991 |
| Grant date | Feb 16, 1993 |
| Priority date | — |
| Expiry date | Sep 27, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P15/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A measuring device for measuring the braking torques generated by a vehicle-mounted electromagnetic retarder having a fixed secondary magnetic circuit or "stator". The device includes a sensor for measuring the speed of rotation V of the rotor of the retarder, a detector for detecting variations in the electrical potential difference U that is generated during operation of the retarder between two points on its stator, which points are sufficiently distinct from each other with respect to the way electrical potential varies at the two points during the operation, a further sensor for measuring the amplitude A of the variation, a memory circuit suitable for causing to correspond to each pair of measured values A and V the value C of the corresponding torque, and a unit for displaying or making use of the values C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.