G - Physics – 05 – B
Patent
G - Physics
05
B
318/25
G05B 11/16 (2006.01) G05D 3/18 (2006.01) G08C 19/02 (2006.01) G08C 25/02 (2006.01)
Patent
CA 2018733
A two-wire power and position control system uses a pair of electrical conductors between a central station and remote station. The remote station is arranged to generate a physical displacement by a permanent magnet DC motor and attached gear-linkage mechanism. Pulsating voltage is applied to the two-wire connecting link from the central station to the remote station as the power source for the DC motor. The physical displacement information of the remote station is extracted by the central station within the off-cycles of the pulsating power signal. In the first arrangement. the remote station enables or disables the flow of back-EMF signal generated by the permanent magnet DC motor as a means of position indication. In the second arrangement, the remote station is arranged to sequentially connect various impedance to form part of a voltage divider network in combination with circuit elements at the central station. The change in impedance is used to affect a voltage derived from the voltage divider at the central station. In either arrangement, the central control station will be capable of monitoring and controlling the position of the remote station.
Ho Kwok-Chuen
Tong Chi-Shing
Vepy Tamas A.
Honeywell Limited - Honeywell Limitee
Smart & Biggar
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