130-28176 Parallax Inc, 130-28176 Datasheet - Page 294
130-28176
Manufacturer Part Number
130-28176
Description
KIT PARTS PROCESS CONTROL
Manufacturer
Parallax Inc
Specifications of 130-28176
Accessory Type
Education Kit
Product
Microcontroller Accessories
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
Board of Education Full Kit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
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Consider Figure 8-14a, which has a proportional band of 100%, and a K
that 100% of the drive is controlled over 100% of the control band. This is known as a
100% Proportional Band of Control. Gain is 1 because it is:
Now consider Figure 8-14b. 100% of the drive is controlled over only 50% of the control
band. This is termed a 50% Proportional Band and has a gain of:
Gain and Proportional Band are actually inverses of one another. They are two different
ways of discussing the same concept.
Applying Proportional Drive
It's time to apply the theory to practice and see the response of the system. For this run
we want to be at the temperature that relates to a 50% bias drive.
Figure 8-14: 100% Proportional Band (a) and 50% Proportional Band (b)
K
K
P
P
= ∆Output/∆Input = 100%/100% = 1
= ∆Output/∆Input = 100%/50% = 2
a
b
P
of 1. It shows
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