Hi.
Like so many before me I am try to build 3 phase 115v, 400Hz supply to drive an ex-aircraft gyroscope (or two).
My starting point is this ready made module
http://www.bldcmotor-driver.com/sal...r-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/sal...bt-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 pi low pass.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.
Like so many before me I am try to build 3 phase 115v, 400Hz supply to drive an ex-aircraft gyroscope (or two).
My starting point is this ready made module
http://www.bldcmotor-driver.com/sal...r-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/sal...bt-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 pi low pass.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.