OM9375 Просмотр технического описания (PDF) - Omnirel Corp => IRF

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OM9375

FULL-FEATURED POWER MODULE FOR DIRECT DRIVE OF 3-PHASE BRUSHLESS DC MOTORS

Omnirel Corp => IRF 

OM9375

SIMPLIFIED BLOCK DIAGRAM

COMMUTATION TRUTH TABLE

This table shows the Phase Output state versus

the state of the Hall-Effect and Direction Inputs.

Please note that the OM9375 Hall-Effect Inputs

are Grey-encoded; that is, only one input is

allowed to change from one input state to

another at a time.

The commutation coding shown reflects Hall-

Effect sensors that are spaced at 120°

mechanical increments. Also, internal

protection logic disables all three Phase

Outputs when the Hall-Effect Inputs are set to

an illegal condition (i.e. all logic low or all logic

high).

DIGITAL INPUTS

Dir

H1

1

0

1

0

1

0

1

1

1

1

1

1

0

1

0

1

0

1

0

0

0

0

0

0

X

0

X

1

H2

H3

0

1

1

1

1

0

1

0

0

0

0

1

0

1

0

0

1

0

1

0

1

1

0

1

0

0

1

1

PHASE OUTPUTS

A

Hi-Z

Sink

Sink

Hi-Z

Source

Source

Sink

Sink

Hi-Z

Source

Source

Hi-Z

Hi-Z

Hi-Z

B

Sink

Hi-Z

Source

Source

Hi-Z

Sink

Source

Hi-Z

Sink

Sink

Hi-Z

Source

Hi-Z

Hi-Z

C

Source

Source

Hi-Z

Sink

Sink

Hi-Z

Hi-Z

Source

Source

Hi-Z

Sink

Sink

Hi-Z

Hi-Z

2.1 - 2

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