Lubricant used in the ball groove rolling sliding contact pair of a heavy load tracked vehicle is a lithium base grease which is waterproof and heat-resistant.

Study on acoustic detection of stator slot wedges in large generators;

After a long term running of large generator,the stator slot wedges would become loose under electromagnetism force as a result of the compositive effect of stator winding current and the magnetic field across through stator slot.

The overhaul procedure of the stator wedge in pumped storage power station is introduced in this paper.

An on\|site test was performed through the acoustic detection system to detect stator wedge looseness in a generator.

In this paper,a physical model,thin plate resonator model,is proposed and analyzed based on the thin plate theory to investigate the acoustic signal response of the loose stator wedge to an impact.

For a class of 12/8-pole skewed-rotor doubly salient motor, operation principles of its three-phase full-bridge power controller are first analyzed, with the single-chop control strategy.

The static characteristics and basic operating principles for a novel skewed-rotor doubly salient permanent magnet(DSPM) motor are first given.

The authors analyse at first the skin effect coefficient on rotor slot of different shapes by adopting finite element method; and then predict the skin effect coefficient of motor rotor by a new method which combines nonlinear mapping ability of artificial neural netwo.