RRS750E

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Rotary Potentiometers, Rheostats are widely used in various electric devices, especially in those that require precise resistance regulation. RRS750E is one of them and is among the most advanced products of its kind. The RRS750E has several advantages, including a wider potentiometric range, a low power consumption, improved accuracy and long-term stability. Its high temperature stability and wide temperature range make it suitable in various applications. The following is a detailed discussion on the working principle and application field of RRS750E.

Basic principles of RRS750E

RRS750E is a single-turn rotary variable resistor with a temperature-compensated element. When a resistive element with uniform linear resistance (LPR) is rotated between two axes, the resistive value of the element will change in a sine waveform. The resistance R of the rotary potentiometer can be expressed as: R=LPR*sinθ, where θ is the angle of rotation of the resistive element. The change of the sinusoidal resistance produces a continuous output voltage, which can regulate the value of the voltage-dependent device or current-dependent device.

The RRS750E operates in two-level voltage or current mode. When operating in two-level voltage mode, the output voltage is limited between upper and lower voltage levels. When operating in two-level current mode, it limits the current output from the supply-side power device to the load. Compared to other brands of rotary potentiometers, RRS750E has a much lower temperature drift. The wave-shaping circuit of the RRS750E can ensure the output sinusoidal waveform of the device even when the tank voltage fluctuates. The drive adjustment circuit further enhances the linearity of the waveform and ensures that the output voltage is always within the specified range.

RRS750E application field

RRS750E is mainly used in those applications requiring precise regulation of resistance, such as motor controllers, power inverters, current pickups, phase compensators, AC voltage regulators, low power voltage regulators, and low power DC-DC converters. It is also used in temperature controllers and activators for computer fan speed, solar panels, and in audio equipment for tone control, such as in volume and treble controls.

RRS750E can also be used in position measurement and closed-loop control applications, such as in industrial robots, radar antennas, ejectors, and other precision measurement and control devices. Its temperature coefficient of 0.008%/℃ and its operational temperature range between -55℃ to +105℃ makes it an ideal choice for use in applications requiring higher tolerance and temperature range.

Conclusion

RRS750E is one of the most advanced rotary potentiometers available on the market, due to its wide temperature range, low power consumption, improved accuracy and long-term stability. Its wide application makes it suitable for a broad range of applications, from motor controllers and power inverters to temperature controllers and closed-loop control systems. Thanks to its excellent performance and quality, it is widely used in electric devices that require precise resistance regulation.

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