Supervisory and control system for rotary machinery, particularly rotary electrical machines

Claim 1

Rotary machine supervisory system for components of a rotating part of the machine comprising at least one measuring sensor (53,54) providing measuring signals, located in or on the rotary machine part; a rotary transducer (1) forming a transformer having a stator (1a), including a stator core and a stator winding located on a stationary part of the machine, and a rotor (7) including a rotor core and a rotor winding located on the rotary machine part; the core of the stator being ring-shaped and having, in axial section, an L-shaped cross section and the core of the rotor (7) being ring-shaped and having, in axial section, an L-shaped cross section, said cores of the stator, and rotor, respectively, being positioned to form, together, a generally O-shaped, or rectangular axial section providing for coupling of said cores and hence of said windings. a threshold circuit (14) rotating with the rotor (7) and electrically coupled to the sensor, or sensors (53, 54) and converting the measured signals into threshold-value signals having discrete steps or intervals between adjacent threshold levels, the threshold circuit having its output electrically coupled to the rotor (7) of the rotary transducer (1) in form of a load to load the rotor winding, selectively, in said discrete steps; an electrical power supply (50) connected to the stator winding to transfer power to the rotor winding by transformer action; and a control unit (33) connected to the power supply and electrically coupled to the stator (1a) of the rotary transducer (1), the control unit including response circuits providing discrete output signals corresponding to the discrete levels of the signals provided by the threshold circuit (14) and coupled through the transducer (1) to the control unit, said transducer further coupling electrical power from the stator to the rotor and hence to the threshold circuit (14) and the sensor, or sensors (53, 54).