NTN has recently developed a magnetic angle sensor that detects the rotational position (rotation angle) of the shaft. It is designed to be integrated with the bearing and can be set in a narrow space of 8 mm or less in the axial direction. With a high accuracy of ± 0.4 degrees or less, it can be used in components such as a drive motor of an electric vehicle (EV). EV drive motor and electric power steering motor to improve the energy efficiency of the rotor rotation position will be fine-tune the motor current. This requires the use of angle sensors that accurately detect the rotational position of the motor. Magnetic sensors and resolvers rather than optical sensors are used in environments where there is vibration and contamination. There are many types of magnetic sensors that are used for the detection at the shaft end. So far, there are no high-precision angle sensors that can be equipped with the detection of the periphery of the rotary shaft. The resolver also has the problem of needing to separately prepare the signal processing circuit. The development of the sensor will be widely used in car wheel speed sensors and other magnetic ring installed in the bearing inner wheel, and the magnetic sensor magnetically mounted on the outer ring housing to detect the angle. The magnetic ring is arranged with two rows of magnetic patterns with different numbers of magnetic poles. When two separate magnetic sensors are used to read the two magnetic patterns, the amount of deviation between the two sensor signals varies with the rotational position. From this amount of deviation, the rotational position (angle) is found with high precision using the same principle of a slider (scale) as the reading of the vernier caliper. Magnetic sensors are jointly developed with the French company SNR. Its maximum speed up to 15,000 rpm, can be used for EV drive motor. In addition, if you reduce the number of pole pairs, the performance parameters can be more than 15,000 rpm. Due to the built-in signal processing circuit, there is no need for an external processing circuit to simplify the system configuration.
Differential Pressure Sensor
Gamicos, aims to provide customers more options when they want to buy a product to measure object's pressure. Differential Pressure Sensor, also called differential transmitter or differential transducer, is used to measure the difference between two pressures, It can be used to measure the differential pressure of different medium like water, air, oil, gas, etc. The working principle of the differential pressure sensor is that the measured pressure directly acts on the diaphragm of the sensor, so that the diaphragm produces a small displacement proportional to the water pressure, so that the resistance value of the sensor changes, and the electronic circuit is used to detect this change, and convert the output of a standard measurement signal corresponding to the pressure.
Differential Pressure Sensor, Differential Pressure Level Sensor, differential air pressure sensor; differential pressure transmitter
Xi'an Gavin Electronic Technology Co., Ltd , https://www.gamicos-meas.com