TMS320F2800137: How to convert Vrms/krpm to vphz

Ankit Saxena

Hello,

Could you please assist me in converting the voltage constant from Vrms/krpm to vphz? The compressor documentation specifies the voltage constant in units of Vrms/krpm, but for the motor settings, USER_MOTOR1_RATED_FLUX_VpHz requires it in vphz. Your guidance in this conversion would be greatly appreciated.

One more thing, motor have 6 poles (3 pole pairs).

over 2 years ago

0 Yanming Luo over 2 years ago

TI__Guru** 117270 points

Recommend you may use the identification function to get the value for running the motor.

0 Ankit Saxena over 2 years ago in reply to Yanming Luo

Prodigy 220 points

Thanks for the reply, but I just want to know about this calculation. Is there any formula/calculation to get this conversion?

Below are our variable

Voltage Constant: 54 Vrms/krpm

Number of poles: 6

Operating Frequency (A/C Freq): 50 Hz

+1 Yanming Luo over 2 years ago in reply to Ankit Saxena

TI__Guru** 117270 points

You may take a look at section 6.9 "Setting PMSM Motor Parameters in user.h" or "4.8 Setting ACIM Motor Parameters in user.h" of InstaSPIN-FOC and InstaSPIN-MOTION User's Guide ( https://www.ti.com/lit/spruhj1)

0 Ankit Saxena over 2 years ago in reply to Yanming Luo

Prodigy 220 points

Thanks Yanming Luo for the document.

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TMS320F2800137: How to convert Vrms/krpm to vphz