New PMSM Motor Control

Limei Zhao

New Motor Specification 3 phase, 2 pole, 200krpm.

Electrical speed @200krpm : 3.333khz Motor output power: 2kw, efficiency: 95.5%

Control efficiency: 95%Control output power: 2100W Power supply power: 2200W

Back EMF voltage is about 16vrms. Output current RMS value per phase: about 44A Output current peak value phase to phase: about 70AOutput voltage peak value phase to phase: about 45V

Phase Inductance: 2~3uH

Filter or simple reactance is necessary.

Components Need to Be Changed

MOSFETs: Stand up to at least 45V

Current sensors: Stand up to at least 70A

Power Supplier: Can provide 2200W

MOSFETs IRF1607

HEXFET Stand up to 75V, 142A Ultra low on-resistance: 0.0075 Ohms operating temperature Price: $3.08 per unit

Co175

Current Sensor Allegro Current Sensor: ACS750

+/- 75A up to 150°C Single supply +5V Linearity > 98.5%,13kHz bandwidth

Power Supplies Xantrex 2800W output (two

modules) 40V, 70A 60V, 46A About $2,880

Higher voltage, lower current power supply is easier found

 

 

 

Soft Switching (I) Why need soft switching

reduce switching loss lower heat dissipation

What is soft switching Resonance is used to clamp current or voltage

to zero to create zero voltage switching (ZVS) and zero current switching (ZCS) conditions

Soft Switching (II) Resonant pole inverters Resonant DC link inverters Quasi resonant DC link inverters Resonant snubber inverters

Future Work Finish open and close loop control Update hardware Test the system performance Improve efficiency