Transcript Some Issues about new PMSM Motor Control

Some Issue about
New PMSM Motor Control
05/02/2003
Limei Zhao
Issue about Power Supply: (1)
Provide 2200W
 Output Voltage VDC: 28V
 Output Current IDC: 78.57A
Two solution:

Xantrex 6000W output XPR40-150:40V, 150A(About $3,895)


Standard input voltage is 190 to 242 VAC (208 Vrms nominal),
3 PH, 47-63Hz, 3 wire + Safety Ground
Parallel several low power power supply

Must support auto-series, auto-parallel operation

Agilent 6012B Autoranging dc Power Supply, 60V, 50A (About $4,000)
Issue about Power Supply: (2)
240V power line

How to apply for installing it in Control Lab

Any possible difficulty?
Issue about Current Sensor


Stand up to at least 91A, 3.3KHZ
Two solution:

Allegro Current Sensor: ACS750ECA-100



+/- 100A up to 85°C, 13kHz bandwidth
New component whose price hasn’t provided yet, no production
quantities until July through distribution but samples may can be
gotten
Separate input current
 High Amp range and huge bandwidth current sensor with
voltage output is not easy to find
Issue about Encoder
An benchmark to get rotor position for realizing close loop
control
Should install encoder?
 To do test with the old motor at first to get some
experience
Price to install the encoder
 About $80
Issue about DSP Chip
Should we need faster DSP chip?
 Higher sampling frequency
 Better signal
 Higher efficiency
DSP for control:PWM, A/D channel

TMS320LF2407A is a good choice
 Same Source code, Application note
 Fast: 40MIPS
Parallel DSP Maybe need for super high speed close loop control
Future Work
Continue close loop control on the old
motor
Update hardware
Test the system performance
Improve efficiency