Regenerative drive control
US4469999A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 14, 1983 |
| Grant date | Sep 4, 1984 |
| Priority date | — |
| Expiry date | Feb 14, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P23/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A regenerative drive control is connectable to an AC power source and includes a negative converter bridge (10) having an input (12, 14, 16) connectable to the AC power source and an output connectable to a DC bus, including a positive bus (18) and a negative bus (20), a load (24) having inductance and resistance and operable to generate regenerative current and direct regenerative current through the negative converter bridge to the AC power source. The negative converter bridge includes a plurality of SCR's (41, 42, 43, 44, 45, 46) arranged in a plurality of series connected pairs with each series connected pair forming a leg of the converter bridge which extends between the positive and negative buses. A gating circuit (80) is provided for sequentially gating the SCR's to establish a controllable DC output on the DC bus. Sensing means (110) for generating an inhibit signal indicative of a fault is provided. The sensing means acts to de-energize the load to prevent generation of regenerative current upon the occurrence of a fault. The sensing means also acts to prevent the gating circuit from normally sequentially gating the plurality of switchable devices to deenergize the DC ou…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.