Welcome to the PF.Moosemunch said:
Looked there but didn't find exactly what I was looking for. Want to wrap the coil directly around the conductor without using an iron or steel ring. This config is what I'm interested in. Will it produce a voltage without an iron ring?berkeman said:Welcome to the PF.
Try Googling "current transformer". Let us know if you have questions about that reading.
In that case, the magnetic field from the current in the conductor will be at a right angle from what you need to induce a voltage in the pickup coil. Not going to work that way, sorry.Moosemunch said:
Running the wire through the core of a toroid and wrapping many turns of a sensing coil around the toroid gives you the best coupling and the highest signal-to-noise, which gives you a better and more accurate measurement of the AC current in the wire. You can just put an air-core coil next to the wire, oriented in the same plane as the wire so that the B-field shown in the first figure goes through the plane of the coil. You need the changing B-field piercing the surface of the circle that is inside the coil in order to induce the AC voltage in your pickup coil.Moosemunch said:
To upload a PDF or JPEG image, click the UPLOAD button in the lower right of the Edit window. To link to a picture on the web, click the little picture icon (between the smileys icon and the 35mm film icon on the toolbar), and paste in the URL.Moosemunch said:
Moosemunch said:
Current sensing in a conductor involves measuring the flow of electric current through the conductor. This is typically done by using a device called a current sensor, which detects the magnetic field generated by the current and converts it into an electrical signal that can be measured.
Sensing current in a conductor is important for a variety of reasons, including monitoring and controlling power usage, detecting electrical faults, and ensuring proper functioning of electrical systems. It is also used in various industries such as power generation, automotive, and renewable energy.
Some common methods for sensing current in a conductor include using a shunt resistor, a hall effect sensor, a Rogowski coil, or a current transformer. Each method has its own advantages and is chosen based on the specific application and requirements.
The accuracy of current sensing in a conductor depends on various factors such as the type of sensor used, the quality of connections, and external factors such as temperature. Generally, current sensing can be accurate within a range of 1-5% of the measured current.
Yes, current sensing can be done in both AC and DC circuits. However, different methods may be used for each type of circuit, as the flow of current in AC circuits is constantly changing, while in DC circuits it remains constant. It is important to choose the appropriate method based on the type of current being sensed.
