MC1003-000-203

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The rotary potentiometers and rheostats are versatile types of electrical instruments commonly used in a wide range of industrial and commercial applications, from basic control systems to complex machine monitoring. The MC1003-000-203 is an example of a slightly more complex rotary potentiometer, providing higher precision and technology for more advanced applications. This article looks at the application field and working principle of this particular rotary potentiometer.

Application Field

The MC1003-000-203 is suitable for a wide range of electronic applications with low to medium voltage requirements. It is particularly suited for controlling higher power motors, sometimes with current loading up to 10 amps. This type of rotary potentiometer has a full range of 100 turns and can be used for motor speed adjustment, over voltage and over current protection, and speed control of driven machines. It has also seen successful applications in the area of process automation, both in factory automation and medical automation.

More specifically, the MC1003-000-203 is also suitable for use in applications with operating temperatures as high as 125C. Therefore, this rotary potentiometer is also often chosen in situation where, for instance, car simulation systems need to be tested on different temperature conditions. The same can be said for HVAC and liquid pumps, vibration control systems, and active suspension systems.

Working Principle

The MC1003-000-203 is designed to provide accurate, repeatable, and reliable control of current, voltage, and power across a wide range of conditions. Its working principle is based on a single-armature potentiometer. Here, the armature is connected to a circular shaft that can be rotated. Upon rotation, the armature moves along the shaft, while its position is constantly monitored by a linear variable differential transformer (LVDT).

The LVDT consists of two coils and a core, each of which is positioned in a particular manner. The control current passes through the two coils, which induce a secondary magnetic field in the core. Then, as the core moves along with the armature, the relative positions of the coils change, inducing a voltage in the secondary. This induced voltage is proportional to the position of the armature on the shaft.

The voltage is then fed into the inputs of a differential amplifier, where it is amplified and used to drive the output circuit of the rotary potentiometer. This is then used to control the current, voltage, or power in the application according to the user’s settings. By changing the resistance value of the armature, the control can be adjusted accurately and repeatedly to ensure precise control of the circuit.

Conclusion

The MC1003-000-203 is a powerful, accurate, and reliable rotary potentiometer. It provides precise and repeatable control of current, voltage, and power across a wide range of applications - from car simulators to active vibration control systems. Its single-armature principle and linear variable differential transformer (LVDT) provide for accurate and consistent readings. As such, the MC1003-000-203 is a valuable and versatile tool in both industrial and commercial applications.

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