Idle Motor - Segway SNARLER ATV 2021 Series Service Manual

ELECTRICAL SYSTEM
B
A
The idle motor is composed of a plurality of steel stators
and rotors arranged in a circle. Each steel stator is wound
with a coil; the rotor is a permanent magnet, and the
center of the permanent magnet is a nut. All stator coils
are always energized. As long as the current direction of
one of the coils is changed, the rotor will rotate through
an angle. When each stator coil changes the direction of
current in the proper sequence, a rotating magnetic fi eld
is formed, which makes the rotor made of permanent
A
magnets rotate in a certain direction. If the order of
the current direction changes is reversed, the direction
of rotation of the rotor will also be reversed. The nut
connected to the center of the rotor drives a screw rod.
Because the screw rod is designed to be unable to rotate,
it can only move in the axial direction, so it is also called a
linear axis. The end of the screw rod is a plug, so the plug
can be retracted or extended to increase or decrease the
cross-sectional area of the bypass air inlet passage of
the idle speed actuator until it is blocked. Whenever the
current direction of a certain coil is changed, the rotor
rotates through a fixed angle, called the step length,
which is equal to 360° divided by the number of stators
or coils. Correspondingly, the distance the screw rod
moves in each step is also fi xed. The ECU controls the
C
number of moving steps of the idle motor by controlling
the number of times the current direction of the coil is
D
replaced, thereby adjusting the cross-sectional area of
the bypass channel and the air fl ow through it. The idle
motor is installed on the throttle valve body (see【A】on
the left), and the probe of the idle motor is generally fl at
or down.
Idle motor pin defi nition:
The idle motor probe cannot be placed on top, which
may cause loss of step, resulting in unstable idling or
even stalling of the vehicle.

Idle motor

【A】Idle motor phase A
【B】Idle motor phase B
【C】Idle motor phase C
【D】Idle motor phase D
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