P1004-17

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Rotary potentiometers and rheostats are two closely related basic components in the electrical instruments and control engineering fields, commonly employed in many applications where an adjustable voltage or current is desired. The P1004-17 is a popular rotary potentiometer and rheostat, known for its reliability, precision and ease of use. This article will provide an overview of the P1004-17 application field and its working principle.

The Field of Application

The P1004-17 is primarily used as a voltage divider for signal measurement and control purposes. In this configuration, a single input voltage is fed into the component, while adjustable output signals are taken from the two end terminals and the shaft-wiper setting. These multiple outputs make it ideal for applications where multiple, adjustable, signal levels are desired. Additionally, the P1004-17 can also be used as a 4-wire potentiometer, allowing the input signal source to be electrically isolated from the output signal.

The P1004-17 is also commonly employed in process control systems, automatically adjusting one or more signals to desired set-points. This type of application makes it very well suited for complicated closed-loop systems, as the system only requires a single adjustment signal, simplifying the system design. The P1004-17 is also typically employed in motor control applications, as the variable speed of the motor requires the adjustable signal input.

In addition, the P1004-17 can also be used as an adjustable rheostat. This configuration, known as a dummy-load system, can be used to limit the maximum output voltage of a variable power supply. This type of application makes it very useful for study or testing purposes, as the power supply can be adjusted to the desired limit, while providing a safe and controlled environment.

Working Principle

The P1004-17 is typically powered by a DC voltage, applied between the two outer terminals. Internally, the P1004-17 consists of a resistor track with a sliding contact, known as a wiper, that establishes electrical contact with the resistive track. The sliding contact can be moved along the track in a linear fashion by rotating a knob, connected to the wiper shaft.

As the wiper moves along the resistor track, the resistance between one end and the wiper changes, while the resistance between the other end and the wiper remains constant. Thus, depending of the position of the wiper, the voltage across the two end terminals will be different, resulting in the variable output signal desired. The potentiometer is deemed complete when the wiper reaches the end of the resistor track.

Conclusion

The P1004-17 is a popular rotary potentiometer and rheostat, ideal for use in a variety of applications. Its adjustable voltage or current output signal is key component in many processes, making its working principle and field of application essential understanding for anyone working in electric instruments and control engineering. By gaining a basic understanding of the P1004-17, individuals can better assess the best application for the component in any system.

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