Hyster A1.00XL, Руководство по обслуживанию и ремонту

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FIGURE 11. SERIES TRACTION MOTOR
DIAGRAM
FORWARD &
REVERSE
CONTACTOR
ASSEMBLY
BATT
ARM
6931
Parallel or Shunt Wound
In the parallel or shunt wound motor, the current
divides. Most of the current flows through the armature
windings and the remaining current flows through the
field windings. This motor tends to keep a constant
speed under varying load conditions, but has very little
starting torque. A pure shunt motor is not used in Hyster
lift truck systems.
Compound Wound
The compound wound motor uses a combination of
series and shunt windings. The field consists of two
separate sets of windings. One set, whose coils are
wound with a few turns of heavv wire is connected in
series with the armature as a series field. The other set,
whose coil(s) are wound with many turns of fine wire, is
connected across the armature as a shunt or parallel
field. The result is a motor that combines the features of
the series and shunt motors. This motor has good
starting characteristics like the series motor, and
reasonably constant speed between a loaded and
no–load condition like the shunt motor. This type motor
is used for power steering and the hydraulic system.
6932
FIGURE 12. COMPOUND MOTOR DIAGRAM
(HOIST AND STEERING)
BATT
ARM
SHUNT
FIELD
SERIES
FIELD