Motor & Motion Control
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Most
electrical applications use standard AC motors. The starting of such motors
causes currents of up to 8 times full load current to be drawn. This dramatic
current drawn will affect the line voltage and distrub other electronic
equiments. Serveral method are used to decrease the starting current. Such
as Star-Delta starter, Autotransformers can used to decrease the starting
current. However, programming of the starting current and voltage are very
difficult by using those method, and sometimes starting current and starting
torque cannot be satifactory at the same time. The speed control of AC-motor
is very difficult in the pass. Only DC-motor can have acurate speed control.
Stopping a motor is also a major problem in the pass, mechanic brake are
use to stop a motor. Recently, rapid development in power electronics,
soft starter, speed controller and electronic brake are availiable.
AC Motor Start
Most
Recently, advance technology in power electronics provide a electronic
method to control the starting of a AC motor more flexiable. Both current
and torque can set to a desired value easily. Also protection of overcurrent,
overvoltage etc can be found in those kind of devices. DIGITAL
SUPERSTART is most advance digital electronic AC motor soft starter
to provide full protection and smooth start of AC motor.
AC Motor Speed Control
Variation
of the frequency supplied to the motor will alter the speed of rotation
of motor. Frequency inverter combine a variable speed drive with the advantage
of a standard three phase motor. So that making the speed control low costing,
robust, no regular maintenance, no wearing parts. Also using the inverters
are more compact than gear-box, high enclosure classes can be achieved.
The inverter can be transport and replace easily. Espeical, the inverter
can provide high speed application. Volkmann9000
and AV-2 inverter can provide superior performance on speed control.
AC Motor Brake
Traditonally, only mechanical brake are availiable for AC-motor. Mechanical
wear out are frequently occur. Expensive and frequent maintence are required.
New technology using electronic brake can provide quickly and safe brake
without damage to the motor and windings.
BRAKETRON
can improve productivity, maintenace free, simple installation and maintance
by supply the total control of motor brake electronically.