电气工程及其自动化,专业英语课程论文

2021年1月25日发(作者：尤贝尔)

重庆邮电大学移通学院







《电气工程及其自动化专业英语》
课程论文








年级
2012
专业电气工程与自动化

姓名孙猜胜

学号















Three-phase asynchronous motor

Abstract
:
The three-phase asynchronous motor is motor's one ed with single phase
asynchronous motor, three-phase asynchronous motor operating performance is good,
and can save various the structure to be simple, the manufacture is easy,
firm durable, the service is convenient, cost inexpensive ,drag the ability is good,and
so on a series of merits. thus becomes in each kind of electrical machinery the output
to be biggest utilizes

the broadest one kind of electric motor.

Key words:


Moror

Motor starting

Star delta Starting


Three-phase asynchronous motor principle:
When
the
stator
winding
through
into
the
three-phase
ac
three-phase
symmetric
arises when a synchronous speed n1 along the stator and rotor round for space in a
clockwise rotation magnetic field. Because of a rotating magnetic field rotating speed
to n1, rotor conductor of the static beginning, so the rotor conductor will cut the stator
and produce a rotating magnetic field induction emf (induction emf direction DingZe
judge with the right hand). Because the child is short circuit loop ends conductor short
meet, in the role of the induced emf, will produce the rotor conductor with induction
emf direction basic consistent induced current. The rotor current-carrying conductor at
stator magnetic field is the role of the electromagnetic force (the direction of the force
with
the
left
hand
DingZe
judge).
The
electromagnetic
force
of
the
rotor
axis
electromagnetic
torque,
drive
along
the
rotor
rotating
magnetic
field
rotation
direction.
[1]
Through the above analysis can be summed up the motor principle: when
the three-phase motor stator winding (each differ 120 KWH Angle), ventilation with
three-phase
ac,
will
produce
a
rotating
magnetic
field,
the
rotating
magnetic
field
cutting rotor winding, and thus to the rotor winding induced current (rotor winding is
closed
access),
load
flow
of
rotor
stator
conductor
under
the
action
of
a
rotating
magnetic field will produce the electromagnetic force, thus in the motor shaft formed
on
the
electromagnetic
torque,
driving
motor
rotation,
and
motor
rotation
direction
and the rotating magnetic field in the same direction.


The structure of three-phase asynchronous motor:
Types
of
three-phase
asynchronous
motor,
but
all
kinds
of
three-phase

asynchronous motor is the same basic structure, they are the stator and rotor of these
two basic components, the stator and rotor has a certain air gap between. In addition,
end caps, bearings, cable boxes, rings and other accessories,
1). Stator part


Stator
is
used
to
generate
the
rotating
magnetic

Three- phase
motors