resolver of TMDSCNCD28335

jie zhu

Prodigy 30 points

Other Parts Discussed in Thread: TMDSCNCD28335

The following figure is the signal conversion circuit of the resolver of TMDSCNCD28335. What circuit is it, please?

Is there any more detailed information about the circuit?

over 5 years ago

0 Ramesh Ramamoorthy over 5 years ago

TI__Mastermind 27240 points

Well, as you mentioned, this is a signal conversion circuit. It converts the excitation pwm signals into bipolar sinusoid using a filter - amplifier and dc block capacitor. The sine and cosine fbk from the resolver is bipolar in nature. There are circuits here that convert them into unipolar and level shift them to fit within the ADC range.

0 jie zhu over 5 years ago in reply to Ramesh Ramamoorthy

Prodigy 30 points

Is there a detailed document on how the circuit works?

0 Ramesh Ramamoorthy over 5 years ago in reply to jie zhu

TI__Mastermind 27240 points

There is no such document available. The excitation conditioning circuit is a second order filter that converts PWM pulsed carrier signal into a proper sinusoidal carrier for the resolver. The feedback signals are bipolar and so the interface circuit does level translation of bipolar input into unipolar signal fitting within the ADC range. Hope it helps.

0 Ramesh Ramamoorthy over 5 years ago in reply to Ramesh Ramamoorthy

TI__Mastermind 27240 points

If you dont have any follow up queries, let us know so we can close the thread.

Thanks.

C2000™︎ microcontrollers

C2000 microcontrollers forum

resolver of TMDSCNCD28335