DEVICE FOR DETERMINING LOCATION AND DEGREE OF DAMAGE OF SHORT-CIRCUITED SQUIRREL CAGE BARS OF INDUCTION MOTOR ROTOR

摘要

Uses: electric measurement technique for determining the location and degree of damage to rods short-closed windings rotor induction motors. SUMMARY OF THE INVENTION: The device 2 comprises a magnetic circuit and measuring the magnetizing windings are mounted in series on each rod, the measuring coil is incorporated in a voltage circuit wattmeter, namagnichivayuscha winding is connected via a current loop wattmeter to an additional voltage source low frequency 5-10 Hz. In the presence of breakage, cracks, poor soldering closed a short-rod rings resistance increases, the power transmitted along the shaft is reduced, which is recorded by a wattmeter. By indications the wattmeter determined quality state rod. 3 yl.