Automatic control system with gain switching
First Claim
1. An automatic control system for a device to be controlled such as a prime mover comprising(a) means for detecting an operating condition of said controlled device and generating a proportional signal,(b) amplifier means receiving said proportional signal and producing an error signal representative of the difference between the detected condition and a preset value thereof for controlling said device,(c) means for switching the gain of said amplifier means between at least two preset values, and(d) means for controlling said switching means in accordance with load conditions on the controlled device.
2 Assignments
0 Petitions
Accused Products
Abstract
An automatic control system wherein repetitive pulses, the frequency of which is responsive to a remote condition, such as prime mover RPM, are converted to a DC voltage level. The voltage level is compared to a reference by a difference amplifier to produce an error signal. Further signals are produced from the error signal which are ultimately used to control the remote condition. The gain of the amplifier is externally adjustable depending upon conditions relating to the prime mover load conditions.
28 Citations
10 Claims
-
1. An automatic control system for a device to be controlled such as a prime mover comprising
(a) means for detecting an operating condition of said controlled device and generating a proportional signal, (b) amplifier means receiving said proportional signal and producing an error signal representative of the difference between the detected condition and a preset value thereof for controlling said device, (c) means for switching the gain of said amplifier means between at least two preset values, and (d) means for controlling said switching means in accordance with load conditions on the controlled device.
-
10. In an automatic control system having means for detecting an operating condition of a controlled device, and amplifier means for producing an error signal representative of the difference between the detected condition and a preset value thereof, the improvement comprising:
-
means for switching the gain of said amplifier means between at least two preset values, means for controlling said switching means in accordance with load conditions on the controlled device.
-
Specification