Questions tagged [three-phase]
AC power with three legs run 120 degrees out of phase
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3-Phase system Voltage conversion
If we are converting from Y to delta configuration or vice-versa, how do we convert the phases of our voltages? I've seen that we need to add or subtract 30 degrees from one another, but I don't ...
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How does this 230/400 V induction hob draw current? [closed]
The instructions that came with a new Electrolux EIS62441 induction hob didn't specify any recommended breaker sizes or supply cable cross section requirements. The hob comes with more than 1 m of ...
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Three phase rectifier output current
I´m designing a three phase power transformer, and i´m having troubles with the choosing the current value. After the transformer, goes through a three phase bridge rectifier ( full wave and not ...
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Help decoding weird Id current behavior at high motor speeds!
I have implemented a motor controller which employs FOC to control the speed of a PMSM motor, similar to this:
Normally Id reference (IDref) is set to 0 and only the Iq reference (IQref) (quadrature ...
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Need Help with DIY Phase sequence meter
I have seen this video: https://www.youtube.com/watch?v=HyrhW_gnQEM and I am really interested in creating DIY version of this for induction motor. Surfed through internet, but could not anything ...
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BLDC DR8305 design 42A
I'm trying to design my own PCB to control 4 x 300W three-phase motors with the DRV8305 BLDC and an STM32F401, but I have a problem with the number of PWMs available.
To solve the problem of the ...
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Is it possible to use a three-phased 400V, 36A AND and additional single-phased 230V, 16 A in one machine?
We're currently still developing our machine and have made this suggestion to a building technician, who replied that he cannot imagine our machine to have these connections.
We'll work with ...
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Ideal 3 Phase Rectifier [closed]
I am working on a 3 phase PFC and implementing third harmonic injection. In order to do so, I use the min-max method. This would be trivial in an MCU, but everything is being done in analog. I have ...
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Three phase motor with 3 sets of connections. Star, delta, and something else?
What's going on with this motor ? It's not simply wired into a star/delta starter. There's a 3rd option I'm not familiar with. The legend below and to the left shows Star/Star-Star/Delta.
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Feasibility of Using Xinya XY2500 4-Pin Pluggable Terminal for Three-Phase PCB
I am designing a PCB for a three-phase system and considering using the Xinya XY2500 4-pin pluggable terminal connector (pitch 5.08 mm, rated 15A @ 300V) to connect R (Phase 1), Y (Phase 2), B (Phase ...
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I have problem with finding the equation of AC to DC voltage for three phase five wire rectifier [duplicate]
I am writing a thesis about telecommunication tower. A problem came up when I examined the power supply. Most telecommunication equipment uses -48V DC and my supervisor wants me to add the equation ...
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Single transformer unit with identical groups of Dz windings around the same core
Background
I’m working with a three phase transformer with a 480v Delta primary and a 240v Zig Zag secondary. However, it actually contains two primaries (combined in parallel) and two secondaries ...
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Clarke transform seems to result in more current
I am looking into the Clarke transform for a balanced three-phase system (BLDC motor) and from all that I read, it tries to preserve magnitude. So if I apply this to the case of transforming three ...
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Three-phase to single-phase converter to power a single phase load larger than one phase can supply
Is there such a device (e.g. a VFD) that can take a 6 kW 3-phase service (240 V 10 A per phase) and output a single phase that will allow me to use a search light that needs about 14 A?
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230V 3-Phase Power Supply for VFD and PSU Repair
I am repairing CNC electronics and need some lab equipment. I need a 3-phase, 230 V input for the power supply and VFD to debug them. Where should I look to get a supply for this? Is there something I ...
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