The education of wasting energy by Windge in helical gears has achieved in high
speed by testing a group of gears that made of beech in determined geometrical
specifications. So a testing device is designed and developed to measure the Windge wasti
ng
energy in gears.
This device is consists of electrical driver (3kw) that turning a pivot that leaned on two
rolling carrier across a friction wheel. This indented friction wheel is ride in the end of pivot,
while the other free end is supplied with electromagnetic sensor to measure the turning
speed as a function of time across a control board.
The Windge wasting energy is determined by minus the wasting energy that resulting
from turning the pivot alone, from that resulting from turning the whole system (pivot-gear).
After doing the tests and experiments, the patterns of the losing (theoretical losses,
practical losses) is draw. Then a comparative between the theoretical losses and that has
gotten from testing device.
The consumption of power in the industrial field almost reaches approximately 40%
of the total generated power. One kind of useless consumption of power is the losses in the
electrical motors starting. The impact of the losing power might be ignore
d in the
continuous and short time working systems. However, in case of periodic starting up, the
losing ratio will be exaggerated. Also, the controlling of starting up process will be
considerable and can keep the losses at lowest levels. In this paper, the effect of using the
Semi-conductors controlling system in DC motors on power losses was studied and
compared with control system using resistors starting in periodic short time systems. The
obtained results show that there is a relationship between the power saving in KWh per
year as a function of the rated motor power and the number of starting up per Hour. Due to
conveying from conventional controlling system to modern control system uses semiconductor
rectifier.
