Important to inductors, transformers, generators, motors, magnetic fields, inductive heating, magnetic storage, permanent magnets

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How to implement a radial encoder with a diametrically magnetized magnet using a hall-effect sensor?

I want to implement a rotary encoder that doesn't use optical sensing or physical contacts. I found the following solution using a diametrically magnetized magnet on the shaft, and a dual axis hall ...
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53 views

Is there a way to shield the fluidics of a solenoid valve from its magnetic field?

Are there any solenoid valves on the market that specifically shield the fluidics from the magnetic field of the solenoid actuation? Either by physically redirecting the fluidics around the coils or ...
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181 views

Building an electromagnet to work over an air gap

I am currently working on a project where I am building an electromagnet that works over an air gap. Specifically a gap of about 0.3 inches. The electromagnet type was selected because I need to be ...
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115 views

Ground plane and magnets

I am making a wheel encoder out of a Hall Effect sensor with magnets in a concentric circle on the wheel. The Hall effect sensor is on a 2-layer 9x5mm pcb. I usually fill in the layers by drawing a ...
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2k views

What sensors are commonly used for vehicle detection?

I want to make a vehicle detection prototype. I find there are multiple choices of sensors that can be used to detect a vehicle, such as acoustic, ultrasonic, infrared, magnetic inductive sensor. I ...
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43 views

Overcoming rotor magnetic field when magnetizing stator in a Halbach motor

I am currently building a high static torque motor using electropermanent magnets arranged in a circular Halbach array as so: I've coiled magnet wire around the 12 alnico magnets making up the ...
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67 views

How to detect magnetic touch on a surface?

I want to restrict the detection to only sense touch with magnets. The surface is a square, about 1m² of velostat / piezo coax cable. I want to start the signal presence only if the magnet is ...
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42 views

Three Phase Permanent Magnet Rotor Generator Magnetization

I have a three phase permanent magnet rotor synchronous generator. The rotor was recently removed from the machine in order to repair the shaft. The motor when when run at the same speed does not ...
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42 views

Detecting an attached magnet using HMC5883L

I am working on a project for my university using Arduino. I need to detect the change in the magnetic field when a magnet is attached to the outer body of the car. Therefore, I would like to know ...
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32 views

Karman Vortex Street phenomena to turn mechanical energy into electric energy at nano to mm scale?

Is it practical to use the Karman Vortex Street phenomena at a nano scale or mm level to harness the wind's mechanical energy via a carbon nano tubular structure coupled with a magnetic system to ...
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110 views

Ferrite core characterization

I need to make a dc dc converter and have some ferrite toroids but I don't have the datasheet of the cores so I need to know how much energy are capable do store the core and what current can they ...
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53 views

Proximity activation

My boss wants me to implement a system that only lets "allowed users" to use the machineries in our shop. Since I am an IT, I do not have any idea how to process this. I came with the idea to ...