current sensor Articles
-
Improving load regulation in current mode control through inductor current filtering
Current mode control (CMC) though offers improved line regulation, phase margin and high bandwidth suffers from high output impedance. Although load regulation can be improved by incorporating an integral gain, it reduces the phase margin and increases the overshoot. The objective of this paper is to achieve improved output impedance without using an integral controller. Incorporating a high pass ...
-
Rogowski Coil Current Sensing Method
In an earlier blog post, we introduced the 6 different current sensing methods used in the current meters and sensors developed by Hioki. Here, we highlight the Rogowski coil method that enables the design of flexible sensors through the use of an air core (or coreless) structure. In a Rogowski sensor, there is no heat generation, saturation and hysteresis due to magnetic loss, and the insertion ...
-
A blind estimation of speed and rotor position of permanent magnet synchronous motor from the measurements of stator currents using extended Kalman filter
A number of techniques have been developed for estimation of speed or rotor position in motor drives. In this paper, an extended Kalman filter (EKF) is developed for the estimation of speed and rotor position using only the measurements of three phase stator currents. Conventional mechanical sensors are not needed for this estimation. The paper proposes the modelling of the dynamic equations of ...
-
Electrical conductivity as a state indicator for the start-up period of anaerobic fixed-bed reactors
The aim of this work was to analyse the applicability of electrical conductivity sensors for on-line monitoring the start-up period of an anaerobic fixed-bed reactor. The evolution of bicarbonate concentration and methane production rate was analysed. Strong linear relationships between electrical conductivity and both bicarbonate concentration and methane production rate were observed. ...
-
The Hall Element Method for Current Sensing
A few months back, we posted a blog discussing the 6 different current sensing methods used in the current meters and sensors developed by Hioki. Here, we’re highlighting the sensors that incorporate a Hall Element to detect current. A Hall Element is a semiconductor sensor that applies the Hall Effect principle to measure the flow of current through a conductor via the magnetic field the ...
-
Measure Voltage and Current Using a Data Logger
How to Record Accurate AC and DC Current and Voltage Measurements A common data logging application is to measure voltage and current flowing into or out of a piece of equipment, such as a user monitoring current in wind turbines. These measurements can be broadly classified into two groups: AC and DC. Depending on the levels involved, some data logger models can directly measure DC voltage and ...
-
Custom engineering services
Solar MEMS is a company that has earned international recognition for our advanced technology in developing solar sensors for use in space and other high technology sectors, but we also provide our clients with consultancy and custom engineering services, adapting all the experience and knowledge we acquired in our projects. This is one of our business lines with the most demand due to the ...
-
An operational approach to real-time dynamic measurement of discharge
Based on the maximization of entropy, microwave sensors are becoming standard approaches for converting point surface velocity measurements into discharge. Unfortunately, this conversion is conditioned by cross-section regularity and by the need to take the surface measures above the vertical where the maximum velocity occurs. Cross-section irregularities and the presence of floodplains, ...
-
Conductivity Theory and Measurement
Electrical conductivity is a measure of the ability of a solution to cany* a current. Current flow in liquids differs from mat in metal conductors in that electrons cannot flow freely, but must be carried by ions. Ions are formed when a solid such as salt is dissolved in a liquid to form electrical components having opposite electrical charges. For example, sodium chloride separates to form Na" ...
-
Facilities Under Positive Pressure
Building pressure is the difference between the outside air supplied to a building and the air removed from inside a building. Typically, a facilities managers are trying to achieve a building with slight positive building pressure, meaning more air is supplied to the building than is removed from the building. Negative Pressure Indicators Negative building pressure means outside air is ...
-
Patented Fence Electrode Eliminates Humidity Effects on Ion Science PIDs
Introduction In the past, a major limitation to the use of PIDs was their susceptibility to ambient humidity. Humidity effects came in two forms: 1) a decrease in response to VOCs due to a quenching effect as humidity increased (false negative) and 2) a sharp rise and drifting response when subject to very high humidities of typically >90% RH (false positive). The latter response was avoided ...
-
Top 6 Most Common Gas Sensors & Detectors
1) Semiconductor gas sensor It is made by using the principle that the electrical conductivity of some metal oxide semiconductor materials changes with the composition of the ambient gas at a certain temperature. Semiconductor gas sensor can be effectively used for: methane, ethane, propane, butane, alcohol, formaldehyde, carbon monoxide, carbon dioxide, ethylene, acetylene, vinyl chloride, ...
-
Generator Monitoring and Alerts
“Power when you need it” Remote generator monitoring system ensures your backup power systems are always at the ready when called upon. What is a Remote Generator Monitoring System? A device that connects to your generator and via supplied sensors, or utilizing sensors already installed on the generator, monitors the status and health. Communication between the generator and the ...
By AKCP
-
Coker Valve Monitoring in a Refinery
Measurement & Control Solution for Manufacturer of Valve Systems CAS DataLoggers provided the measurement and control solution for a large manufacturer of valve systems used in many different industries. The company produces ball, needle, choke, control, gate, and other types of valve systems with many different diameters. One of its customers was a refinery using a custom 3-way switching ...
-
Calculating Voltage Drop In Water Quality Systems
Introduction More goes into determining power requirements for water quality sensors than just the voltage requirement on the spec sheet. An important, often overlooked factor is voltage drop on wires, which increases the longer they are. While this is not a significant variable for standard cable lengths of 10-25 ft. (3.05-7.62 m), there are many applications requiring long cables (1000+ ft.) ...
-
The Origin and Evolution of the Gyroscope
The gyroscope’s origins can be traced back to its humble beginnings as a simple children’s toy known as the “spinning top.” This seemingly magical feat captured people’s imaginations, from curious youngsters (at least until the era of television and digital entertainment) to more mature thinkers intrigued by the seemingly impossible balance it achieved. This ...
-
Edinburgh Sensors Gas Detection Systems Overview
Founded in 1971, Edinburgh Sensors has become one of the world’s leading manufacturers of gas detectors and cutting-edge Gas Detection Instrumentation.OEM sensors by Edinburgh Sensors are manufactured to the highest specification for integration into a wide range of systems. Providing fast, accurate, and reliable measurements of CO, CO2, CH4 and many other gases. Our CO Sensor, CO2 Sensor, and ...
-
The people that power Clarity: James Stevick, Senior Hardware Engineer
As Senior Hardware Engineer, James Stevick works with our hardware team to develop, build, and test our Clarity Nodes and Modules, streamline the build process, and manage software and hardware tools in Clarity’s research and development work. James’ background in mechanical engineering eventually led him to the air quality monitoring space, where he now works to power Clarity’s ...
-
Cyclops-7 Logger Traces Fluorescein in Nepal - Case Study
Product Description The Cyclops-7 Logger is a completely self-contained waterproof device designed to connect to one Turner Designs Cyclops-7 sensor at a time. PME currently offers two variations of this sensor, fixed and interchangeable. The logger records measurements internally with a variety of rates to choose from. The data is then offloaded from the logger via a USB cable. The logger can ...
-
Masinotek supplied indoor building measurements to the City of Vantaa - Case Study
Masinotek has implemented an indoor environment monitoring project for the City of Vantaa during the spring of 2022. The client in the project is Vantaan VTK Oy, which is responsible for the management of the city's offices as well as the technical management and maintenance of the properties. Masinotek delivered modern IoT sensors, transmitters and an online data monitoring service and data ...
By Masinotek Oy
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you