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
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