The DF6101 speed sensor is a sensor that converts the speed of a rotating object into an electrical output. The speed sensor is an indirect measuring device, which can be manufactured by mechanical, electrical, magnetic, optical and hybrid methods. According to the different signal forms, the speed sensor can be divided into analog type and digital type.

Working principle of DF6101 steam turbine speed sensor

The DF6101 steam turbine speed sensor is a sensor used to measure the turbine speed. Its working principle varies based on different sensor types. The following are the working principles of several common turbine speed sensors:
Magneto-electric speed sensor: The working principle of the magneto-electric speed sensor is based on the magneto-electric effect. When the speed sensor rotates, the magnetic field inside the sensor will change accordingly, causing the sensor to generate a potential signal. The magnitude of this potential signal is proportional to the rotational speed.
Magneto-Resistive speed sensor: The working principle of the reluctance speed sensor is based on the magneto-resistance effect. The sensor contains a magnetic rotor and a stator. When the rotor rotates, the magnetic field in the stator will change, resulting in the change of the magnetic resistance value in the stator. This change will be converted into electrical signal output.
Eddy current speed sensor: The working principle of eddy current speed sensor is based on eddy current induction. When the sensor rotates, the induction coil inside the sensor will generate a rotating magnetic field. This magnetic field will induce eddy current to flow in the metal parts inside the sensor, thus generating electrical signal output.
No matter what type of turbine speed sensor, its basic principle is to use certain physical effects to convert the speed into electrical signal output.

Standard voltage of DF6101 steam turbine speed sensor

The standard voltage of the turbine speed sensor has no fixed standard value, and its voltage depends on the sensor model, working principle, power supply mode and other factors. Different types of turbine speed sensors have different voltage requirements. Generally speaking, their voltage range can vary from a few volts to dozens of volts. In practical application, it is necessary to determine the appropriate voltage range according to the specific sensor model and technical requirements to ensure the normal operation of the sensor and accurate measurement results.

Classification of turbine speed sensors

Turbine speed sensors can be classified according to their operating principle or physical configuration. Here are some common classifications:
Magnetic speed sensors: These sensors work based on the principle of electromagnetic induction. They detect changes in the magnetic field caused by rotating ferromagnetic objects, such as gear teeth or turbine blades.
Hall effect sensor: These sensors detect the magnetic field changes caused by rotating ferromagnetic targets by measuring the Hall effect. Hall effect refers to the voltage difference between the two ends of the conductor when subjected to a magnetic field perpendicular to the current.
Optical sensors: These sensors detect changes in light intensity caused by rotating slotted disks or blades connected to the turbine shaft.
Eddy current sensor: These sensors work according to the eddy current principle. Eddy current is the current generated when a conductor is exposed to a changing magnetic field. They are usually used for high-speed applications.
Acoustic sensors: These sensors use sound waves to measure the speed of the rotating shaft. They are particularly suitable for applications where direct contact with the shaft is difficult or impossible.
Capacitive sensors: These sensors work based on the principle of capacitive coupling, which is the ability of two conductors separated by dielectric to store electrical energy. They are often used in applications that require non-contact measurements.
Inductive sensors: These sensors work based on the principle of inductive coupling, which is the ability of two conductors to exchange energy through the magnetic field. They are often used in applications that require non-contact measurements.

Application of turbine speed sensor

The selection of turbine speed sensor shall be determined according to the specific application scenario. Different types of sensors are applicable to different working conditions. The following are some common turbine speed sensor types and their application conditions:
Magneto-electric sensor: applicable to lower speed range, such as speed detection during startup and shutdown.
Magneto-Resistive sensor: applicable to higher speed range, usually used for monitoring the operation status of steam turbine.
Eddy current sensor: suitable for high-speed rotating shaft, which can provide high-precision speed measurement.
Hall sensor: suitable for high temperature and harsh working conditions, such as high-speed steam turbine.
When selecting the sensor, it is also necessary to consider the accuracy, linearity, stability, reliability, durability and other factors of the sensor, and ensure that it complies with relevant standards and specifications.