I need help designing a 400hz 115vac 3phase power supply -- Help

Question

Hi I need to find a way to get 400hz/115vac/3phase cheaply .. Im a digital person... any thoughts. The unit could be powered from a 28vdc source but better yet 115ac house hold 15amp circuit Cris

peterjcs23 · Answer

or, if you wanted something very simple, you've been suggesting an Arduino solution, you could derive a 3 phase logic signal with 3 logic pins and apply them to a high voltage opamp on each phase via AC coupling and a bit of filtering. (The supply would have to provide current limit.) Once you got this working you could boost the voltage too on the output stage.

AK7466 · Answer

Hi. Like so many before me I am try to build 3 phase 115v, 400Hz supply to drive an ex-aircaft gyroscope (or two). My starting point is this ready made module http://www.bldcmotor-driver.com/sale-11361290-110v-220v-ac-input-stepper-motor-driver-board-high-voltage-motor-control-board.html which comprises a JY02A Sensorless brushless DC motor control IC https://docplayer.net/146908738-Jy02a-sensorless-brushless-dc-motor-control-ic.html and a JY213 Motor Driver MOSFET / IGBT Driver High Speed 3 - Phase Half - Bridge http://www.bldcmotor-driver.com/sale-11344385-jy213h-bldc-motor-driver-mosfet-igbt-driver-high-speed-3-phase-half-bridge.html To give these old gyros the easiest possible life I would like the drive waveforms to be as close to sinusoidal as is realisticaly possible so I am envisgaing incorporating 400 Hz L/C low pass filters between the output of the drivers and the gyro windings. I have looked at various LC filter design tools such as PI Filter http://www.calculatoredge.com/electronics/ch%20pi%20low%20pass.htm Chebyshef https://rf-tools.com/lc-filter/ and understandably all of these design tools require a source and load impedances to be specified. In my application the source impedance will hopefully be very low, and I have no idea what the gyro winding impedance will be when rotating. Please can somebody suggest the best way forward, or point me in the direction of some helpful documentation? Many thanks Alan K.

peterjcs23 · Answer

Cristina, you could use a kit like this to get the basic control but boost up the output drive to reach the voltage you want. However it may be best to learn with this kit and develop your high volts skills as a second step. Three Phase BLDC Motor Kit with DRV8312 and Piccolo MCU - DRV8312-C2-KIT - TI Tool Folder A more complete kit would be: DM300021 - MICROCHIP - POWER MODULE, DSPICDEM, MC1H, MOTOR | Farnell element14 Peter

I need help designing a 400hz 115vac 3phase power supply -- Help

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