Hi to all,
We are producing 3 phase solid state energy meters. For testing purpose, we need an accurate, stable three phase voltage and current sources. We want to make our own testing machine in the factory. At first we may start with single phase voltage and current generator. Due to we produce solid state energy meters, we can easily measure rms voltage, current, active power, reactive power accurately as a feedback. Our problem is generating signals and using measured values as a feedback.
I'm here because It seems that 16 PWM outputs of most of DSPs are not enough for the application. So we are thinking of using PWM Processor and Pure Path Audio Amplifier in this application.
Our final goals are:
Voltage Range: 10Vac-550Vac, 0.1V steps (55000 steps, 16 bit PWM is enough)
Current Range: 1mAac-120Aac, 1mA steps (120000 steps, 24 bit PWM is required)
Phase Angle: 0-360degree, 0.1degree steps (3600 steps, it needs 180Ksample/sec at 50Hz?)
Can we use 24 bit PWM Processor such as TAS5086 (6 ch pwm processor) instead of 16 bit PWM outputs of the MCUs or DSCs to generate very accurate 50/60Hz sine signal?
I have some doubt. TAS5086 processor accepts 24 bit i2S digital signals, but Is output PWM signal generated by it really 24 bit or more?
Regards,
BP.
