Eaton SPI9000 User Manual download pdf (Page 29)

SPI9000 Inverter Unit FR4 – FR8 User Manual

MN04004003E

For more information visit: www.EatonElectrical.com 2-9

April 2006

Power Losses as Function of Switching Frequency

Raising the switching frequency of the drive, to reduce motor noise for example, inevitably

affects the power losses and cooling requirements as shown in Figure 2-7. It illustrates the

power loss for FR7 as a function of switching frequency. For more information, contact Eaton

or your local distributor.

Figure 2-7: Power Loss as a Function Frequency; SPI046 – 087, 480V

SPI061 400V

SPI087 400V

SPI061 500V SPI072 400V SPI072 500V

SPI087 500V

2,000,00

0,00

500,00

1000,00

1500,00

P[W]

2000,00

2500,00

4,00 6,00

Switching Frequency [kHz]

8,00 10,00 12,00

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 91 92

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Eaton SPI9000 User Manual Page 29