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Hydroelectric generators using capacitive air gap sensors assess the space between the rotor and stator to prevent lower efficiency or damage brought on by off-centre or out-of-round circumstances.
When pressure is applied to a diaphragm inside the sensor, the diaphragm flexes away from or towards a fixed electrode, changing the capacitance of the apparatus.
The gadget may transform a pressure reading into a current or voltage value as a result of the physical change, which also causes a change in the electrical output.
An electronic gadget called a capacitive gap sensor may detect solid or liquid targets without coming into touch with them.
Capacitive sensors emit an electrical field from its detecting end in order to detect these targets. A capacitive sensor can identify any object that can interrupt this electrical field.
The Global capacitive air gap sensor market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
The most recent AIR GAP SENSOR RANGE from Sensonics, which is used in strong magnetic field applications, offers a variety of measurement possibilities along with exceptional stability and noise performance.
Sensonics has a long history of manufacturing vibration and positioning sensors for rotating machinery.
The sensor’s rotor to stator air gap measurement can be used to track both the eccentricity of the rotor with respect to the stator and specific pole to stator air gaps.
It is intended for use on hydro turbine generators and big electric motors.
Sensonics’ CS line of air gap sensors are non-contact dynamic position transducers that use capacitive technology to measure the exact distance from a metal target to the sensor face.
Capacitive technology has an advantage in generator applications .
For attachment on the stator wall, the sensor is made in a sturdy stripline mechanical configuration.
The driver receives the transmission signal for the stripline and receiver detection from separate transmit and receive integral coaxial cables that are routed above the stator wall or through ventilation holes.
Both voltage and current linearized opto-isolated outputs are offered, and they can be set up to reflect different rotor pole readings in relation to the stator.
These consist of the pole and rotor profiles as well as a total minimum gap output.
