BRUSHLESS LINEAR ROTARY TRANSFORMER

摘要

A brushless linear rotary transformer apparatus for determining angular position and velocity of a rotor includes a rotor, a stator, a primary coil winding, pairs of secondary coil windings, bearings, an excitation power supply, and a signal receiving and processing system. The primary coil winding is wrapped around a hollow cylinder body on one end of the stator. One end of the rotor shaft is arranged in the hollow cylinder body. Another ends of the rotor shaft and the stator are connected by a bearing. Pairs of secondary coil windings are embedded in the stator and on the inner side of the stator. An alternating magnetic field is produced by the excitation power supply through the primary coil winding, and the induced electromotive forces at the ends of the secondary coil windings are associated with the angular position of the rotor. The signal receiving and processing system samples and processes the signals from the secondary coil winding, and outputs the parameters concerning the angular position, the angular velocity, and the rotation number of the rotor. The brushless linear rotary transformer has the advantages of simple and reliable structure, which can be applied to measure the angular displacement and the angular velocity in multiple turns.

主权项

1. A brushless linear rotary transformer apparatus for determining angular position and angular velocity of a rotor, said apparatus compromising a rotor (1), a stator (2), a primary coil winding (3), pairs secondary coil windings (4), a bearing (5), an excitation power supply (6), and a signal receiving and processing system (7); the primary coil winding (3) being wrapped around a hollow cylinder body on one end of the stator (2); one end of the shaft the rotor (1) being arranged in the hollow cylinder body on the end of the stator (2); another ends of the saft of the rotor (1) and the stator (2) being connected by the bearing (5); pairs secondary coil windings (4) being embedded in the stator (2) and on the inner side of the stator (2); the excitation power supply (6) able to produce an alternating magnetic field through the primary coil winding (3); the electromotive forces induced at the ends of the secondary coil windings (4) being associated with the angular position of the rotor (1); the signal receiving and processing system (7) able to sample and process the signals from the secondary coil windings (4), and able to output the parameters concerning the angular position, the angular velocity, and the rotation number of the rotor (1).