Quote:
Originally Posted by Mc-Key
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Hi Rocky,
The FOC democode is expecting the motor windings in a star connection.
Answering your questions:
1) Yes, the Phase resistance is half of the Line to Line resistance
2) There is no distinction between stator and rotor resistance value in the code
3) it possible to measure the phase inductunce in several ways:
- measure it with a LCR-Meter
- Apply a 50% dutycycle PWM-pattern, measure di/dt with a current Probe and calculate L
4) For this point, I have to reference the literature: "Permanent Magnet Synchronous and Brushless DC Motor Drives" from Ramu Krishnan
On Page 35, he gives a hint:
- Generally, the ratio is in a range of 3
- Earlier in the book he writes Ld > Lq
My proposal is to start with this relations.
The FOC democode is expecting the motor windings in a star connection.
Answering your questions:
1) Yes, the Phase resistance is half of the Line to Line resistance
2) There is no distinction between stator and rotor resistance value in the code
3) it possible to measure the phase inductunce in several ways:
- measure it with a LCR-Meter
- Apply a 50% dutycycle PWM-pattern, measure di/dt with a current Probe and calculate L
4) For this point, I have to reference the literature: "Permanent Magnet Synchronous and Brushless DC Motor Drives" from Ramu Krishnan
On Page 35, he gives a hint:
- Generally, the ratio is in a range of 3
- Earlier in the book he writes Ld > Lq
My proposal is to start with this relations.