补发英文步进电机及其驱动系统简介中英文翻译

2021年1月26日发(作者：leapt)
步进电机及其驱动系统简介中英文翻译

Step characteristics for machine for angular displacement for
entering the electrical engineering is first kind will give or get
an electric shocking the pulse signal conversion cowgirl or line
potential moving battery carry outing a piece, having the fast stopping,
accurate step entering and directly accepting the arithmetic figure
measuring, because of but got the extensive as in the
drafting machine, print the machine and optical instrument inside, and
all adopt the inside of a place control system for entering the
electrical engineering to positioning to paint the pen print head or
optical prinipal, especially indrstry process the type control, and move
to spread to feel the to can immediately attain the precision fixed
position because of its precision and need not potential, and control
the technique along with the calculator of continuously deveolp, applied
to would be more and more extensive.
Control and can is divided into the simple control sum the
complicacy
to control to motor two simple control points to proceeds
to start to motor, the system move, positive and negative revolution and
sequential cacy the control point to the motor's revolving
speed, screw angle, turning moment, tension, electric current etc.
physics quantisty progress l technique that the
development that motor get force is in latest development achievement
that
micro-electronics technique, electric power electronics, spread to
feel the the technique, automatic control the technique, tiny machine
the application technique to y the advance of these
techniques make the motor control the technique at near two 10-year
insides change for turn overing the ground of day is take
them the motor's control division have already been controled by
emulation gradually let locate to regard single flake machine as
principle of microprocessor control, formation the mix control system of
the arithmetic figure and emulation and the application of the pure
arithmetic figure control system, combine control the direction to total
amount word to quickly motor's drive part of power for using
the piece experienced a few renewals
1
to change the on behalf, current switch speed sooner, more simple
whole
type power piece of control the MOSFET become the main current with
IGBT.
Stepper motors have the following benefits:
? Low cost

? Ruggedness

? Simplicity in construction

? High reliability

? No maintenance

? Wide acceptance

? No tweaking to
stabilize
? No feedback components are needed

? They work in just about any environment

? Inherently more failsafe than servo motors.

There is virtually no conceivable failure within the stepper drive
module that could cause the motor to run away. Stepper motors are simple
to drive and control in an open-loop configuration. They only
require four
leads. They provide excellent torque at low speeds, up to 5 times
the
continuous torque of a brush motor of the same frame size or double
the
torque of the equivalent brushless motor. This often eliminates the
need
for a gearbox. A stepper-driven-system is inherently stiff, with
known
limits to the dynamic position error.
Stepper Motor Disadvantages
Stepper motors have the following disadvantages:
? Res
onance effects and relatively long settling
times
? Rough performance at low speed unless a

microstep drive is used
? Liability to undetected position loss as a result of

operating open-loop
? They consume current regardless of load

conditions and therefore tend to run hot
? Losses at speed are relatively high and can cause

excessive heating, and they are frequently noisy
(especially at high speeds).
2
? They can exhibit lag
-lead oscillation, which is
difficult to damp. There is a limit to their available
size, and positioning accuracy relies on the
mechanics (e.g., ballscrew accuracy). Many of
these drawbacks can be overcome by the use of
a closed-loop control scheme.
Note: The Compumotor Zeta Series minimizes or
reduces many of these different stepper motor disadvantages.
There are three main stepper motor types:
? Permanent Magnet (P.M.) Motors

? Variable Reluctance (V.R.) Motors

? Hybrid Motors

When the motor is driven in its full-step mode, energizing two
windings or “phases” at a
time (see Fig. 1.8), the torque available on
each step will be the same (subject to very small variations in the
motor
and drive characteristics). In the half-step mode, we are
alternately
energizing two phases and then only one as shown in Fig. 1.9.
Assuming
the drive delivers the same winding current in each case, this will
cause
greater torque to be produced when there are two windings energized.
In
other words, alternate steps will be strong and weak. This does not
represent a major deterrent to motor performance
—
the available
torque
is obviously limited by the weaker step, but there will be a
significant
improvement in low-speed smoothness over the full-step mode.
Applications in hazardous environments
or in a vacuum may not be able to use a brushed motor. Either a
stepper or a brushless motor is called for, depending on the demands of
the load.
Bear in mind that heat dissipation may be a problem in a vacuum when
the
loads are excessive.
continuous duty applications suit the servo motor, and in fact a
step motor should be avoided in such applications because the high-speed
losses
can cause excessive motor heating.
are the natural domain of the stepper due to its high torque at low
speeds, good torque-to-inertia ratio and lack of commutation problems.
The brushes of the DC motor can limit its potential for frequent
starts,
3
stops and direction changes.
continuous duty applications are appropriate to the step motor. At
low speeds it is very efficient in terms of torque output relative
to both
size and input power. Microstepping can be used to improve
smoothness in
lowspeed applications such as a metering pump drive for very
accurate flow
control.
Stepper motor is a stepper motor for precise electrical and
mechanical
actuators, which are widely used in industrial machinery, digital
control,
for the system reliability, interoperability, maintainability, and