> The Taiyuan Steel Works stainless steel
cold-rolling mill decides the ruler to cut the system because the
original design is congenitally deficient, adds many years movement,
the machinery and the electrical equipment has all had the varying
degree aging, causes the steel plate to decide the ruler to cut the
precision to reduce (±4 mm), cannot satisfy the production request.
Carries on the transformation for this us to this control
system, and began the production in July, 1996, the result is
satisfying. The transverse cutting decides the ruler to cut the
system by to pull the material roller, to survey the roller, the
alligator shears is composed, is the transverse cutting unit's
essential equipment. Decides the ruler in view of the transverse
cutting to cut the system required accuracy high work characteristic,
we embarked from the development high accuracy servo system, have
analyzed the PWM driver mathematical model and the characteristic,
used the shutter speed to be quick, the pressure drop small new IGBT
power module constitutes each kind of power unit, by the PWM way work,
designed the total character style direct current pulse width
servosystem. The systems control partially uses based on 96
series monolithic integrated circuits special-purpose electric current
servo module constitution high speed electric current inner rim, and
constitutes the high accuracy speed closed loop in this foundation.
Based on the electric current servo module formidable
data-handling capacity and the extremely quick processing speed, the
system has the very high servo precision. In order to guarantee
the computer under any intense disturbance still to be able the normal
work, system foreign connection (including simulation hypothesis
mouth) complete photoelectricity isolation, and has used the unique
computer antijamming technology, once the disturbance occurrence, the
system could the discovery and enters the normal work in 100 mu s
after the replacement. In order to protect the power component
the security and enhances the system the entire machine reliability,
the system has realized omni-directional protecting oneself, like the
voltage owes presses the protection, the electric current has flowed
the protection, the overload protection (reports to the police), out
of control protection, on, under spacing, system "pumping energy"
泄放 protection and so on. Since this system investment
movement, the movement stable, has been reliable, cuts the stainless
steel operational accuracy to achieve ±1 mm, enhanced the product
qualified rate, has had the enormous economic efficiency. This
article produces the servosystem aims at the direct current moment of
force electrical machinery, after but changes the little parameter
also to be possible to use in the common direct current servo
electrical machinery. |
