So far in my pcb motor projects the magnet was being actuated by the fix stator. With this flex pcb i have managed to do the opposite, have a fixed magnet that moves the pcb by its alternating magnetic field.
The pcb is dual layer and is 0.13mm thick. Although it has only 70 turns, the thin dielectric will improve the coupling.
How small can my Flexible PCB Actuator get? This is the question I tried answering in this video! I first discuss how we can get it smaller and the compromises involved. Then I measured the specifications of each prototype and tested the actuators in different applications.
Before I can start building robots with this thing, I need to measure its characteristics and test its limitations.
In this video, I have tested my Flexible PCB actuator and also compared it to my Linear PCB Motor which has the same dimensions but different layer count. The measured data is shown bellow:
4-Layer Linear PCB Motor
2-Layer Flex PCB Actuator
Maximum Temperature @ 5V
The flex PCB has half the turns, so its resistance is lower. This means that more current can pass through it, so obviously it gets a little hotter. This means that this flexible pcb actuator can be used with lower voltages. The thin dielectric of this pcb also improves the coupling of the magnetic field.
I was also able to reach a maximum operating frequency of 65Hz.