For many of you know I am pushing the limited with inverter tech as far as I can on the budget I have.
One of the main limitations I have is the current sensor I use for the phase current measurements.
A list of what is needed for a good current sensor is.
1 fast response as fast as possible 4us or less!!
2 very low or no magnetic memory.
3 low cost
4 small and compact.
5 Light weight
6 simple to use
7 read current in 2 directions.
8 the end signal needs to be analog and still within the time from number 1
Did I miss anything?
For many of you following my work I have CSLA2EN 950 amp AC/DC current sensors in use!
I have taken the toroid out of one and opened up the gap hoping I can make it read more current but thats not easy as its laminated metal.
I have parts coming from a generous memeber for a 1000hp controller (peak).... I will need 2000 amp current sensors!
Also I have used the melaxis chip MLX91208LDC-CAV-001-SP
With it you make a cheep simple circuit board and it can lay right on you buss bars. I made one that reads about 850 amps (have to look at my notes for the exact number) But it needed shielding or it didn't work at all. I ended up using 9 layers of .020" thick mu-metal it works ok but it has a problem with reading 0 amps on my gauges in the car. The Mu-metal is not perfectly magnetic memory free.
https://www.digikey.ca/product-detail/en/melexis-technologies-nv/MLX91208LDC-CAV-001-SP/MLX91208LDC-CAV-001-SP-ND/6173904
Another current sensor I have not tested was suggested to me is the A1326
Also STM32F302, TI TMS320F28 were mentioned!
Anyone who wants to step into this we could all use help because more current means less voltage! (Or for me MORE POWER!!!!!!!!!!!!!!!!!!!!!!!!!!)
One of the main limitations I have is the current sensor I use for the phase current measurements.
A list of what is needed for a good current sensor is.
1 fast response as fast as possible 4us or less!!
2 very low or no magnetic memory.
3 low cost
4 small and compact.
5 Light weight
6 simple to use
7 read current in 2 directions.
8 the end signal needs to be analog and still within the time from number 1
Did I miss anything?
For many of you following my work I have CSLA2EN 950 amp AC/DC current sensors in use!
I have taken the toroid out of one and opened up the gap hoping I can make it read more current but thats not easy as its laminated metal.
I have parts coming from a generous memeber for a 1000hp controller (peak).... I will need 2000 amp current sensors!
Also I have used the melaxis chip MLX91208LDC-CAV-001-SP
With it you make a cheep simple circuit board and it can lay right on you buss bars. I made one that reads about 850 amps (have to look at my notes for the exact number) But it needed shielding or it didn't work at all. I ended up using 9 layers of .020" thick mu-metal it works ok but it has a problem with reading 0 amps on my gauges in the car. The Mu-metal is not perfectly magnetic memory free.
https://www.digikey.ca/product-detail/en/melexis-technologies-nv/MLX91208LDC-CAV-001-SP/MLX91208LDC-CAV-001-SP-ND/6173904
Another current sensor I have not tested was suggested to me is the A1326
Also STM32F302, TI TMS320F28 were mentioned!
Anyone who wants to step into this we could all use help because more current means less voltage! (Or for me MORE POWER!!!!!!!!!!!!!!!!!!!!!!!!!!)