Vibratory feeder voltage control
US5145054A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 2, 1991 |
| Grant date | Sep 8, 1992 |
| Priority date | — |
| Expiry date | Apr 2, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB06B1/0261
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A control for regulating the AC voltage provide to a vibratory feeder, which includes electronic circuitry for generating a "desired" voltage signal, feedback circuitry for generating an "actual" voltage signal, a logic circuit for comparing the "desired" and "actual" voltage signals and generating a difference signal, and a controller which uses the difference signal to generate a control signal for regulating the AC voltage provided to the feeder. An initialization circuit enables the control a predetermined time after AC power is applied and an automatic relay couples a DC power source to the control for selective adjustment of the control output. A fault circuit automatically shuts down the control if the feedback signal is lost when the "desired" voltage signal is at or turned down to a predetermined level. A maximum AC output indicator identifies the optimum setting for a maximum output adjustment, regardless of load, and a ramp function determines the build-up and decay of the AC output voltage. Logic circuits are utilized in conjunction with the control for independently setting "on" and "off" delay periods and for controlling the on/off operation of the control in response…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.