ABB DO610 Analog module industrial system controller

Description

Packaging details: if you need an urgent delivery order, please feel free to contact us, and we will do our best to meet your needs.

Price problem: if you find that other suppliers offer cheaper prices for the same product, we are also willing to provide you with reference prices and give you further discounts.

These are just some of the demands from industry. DTC can
deliver solutions to all these demands as well as bringing new
benefits to many standard applications.
Who invented DTC?
ABB has been carrying out research into DTC since 1988 foll owing the publication of the theory in 1971 and 1985 by German
doctor Blaschke and his colleague Depenbrock. DTC leans on
the theory of field oriented control of induction machines and
the theory of direct self control. ABB has spent over 100 man
years developing the technology.
Performance
What are the main benefits of DTC technology over traditional AC drive
technology?
There are many benefits of DTC technology. But most significantly, drives using DTC technology have the following exceptional dynamic performance features, many of which are obtained
without the need for an encoder or tachometer to monitor shaft
position or speed:
– Torque response: – How quickly the drive output can reach
the specified value when a nominal 100 percent torque reference step is applied.
For DTC, a typical torque response is 1 to 2 ms below 40 Hz
compared to between 10-20 ms for both flux vector and DC
drives fitted with an encoder. With open loop PWM drives (see
page 11) the response time is typically well over 100 ms. In
fact, with its torque response, DTC has achieved the natural
limit. With the voltage and current available, response time
cannot be any shorter. Even in the newer “sensorless” drives
the torque response is hundreds of milliseconds.
– Accurate torque control at low frequencies, as well as full
load torque at zero speed without the need for a feedback
device such as an encoder or tachometer. With DTC, speed
can be controlled to frequencies below 0.5 Hz and still provide
100 percent torque right the way through to zero speed.
– Torque repeatability: – How well the drive repeats its output torque with the same torque reference command. DTC,
without an encoder, can provide 1 to 2 percent torque repeatability of the nominal torque across the speed range. This is
half that of other open-loop AC drives and equal to that of
closed-loop AC and DC drives.