IRDM983-025MB, IRDM983-035MB

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18

Load Curves

The following Table shows EFF pin mapping between input voltage and the advanced angle in degree per

50Hz of fundamental electrical frequency. Phase advance is by design clamped to be lower than 45 degrees

at every frequency. At frequencies above 100 Hz the advancement is constant and it is kept to the same

value at 100Hz.

Select

Degree/50Hz

Frequency [Hz] @

advance=45deg

EFF input

EFF digital input

15

25.49

64.22

3.094V

– 3.300V

152

14

24.15

65.75

2.888V

– 3.087V

144

13

22.81

68.04

2.681V

– 2.881V

136

12

21.47

70.34

2.475V

– 2.675V

128

11

20.12

72.63

2.269V

– 2.469V

120

10

18.78

75.69

2.063V

– 2.262V

112

9

17.44

78.75

1.856V

– 2.056V

104

8

16.10

81.80

1.650V

– 1.850V

96

7

14.76

87.16

1.444V

– 1.644V

88

6

13.42

92.51

1.238V

– 1.437V

80

5

12.07

99.39

1.031V

– 1.231V

72

4

10.73

Advance=40deg

above 100Hz

0.825V

– 1.025V

64

3

9.39

Advance=35deg

above 100Hz

0.619V

– 0.819V

56

2

8.05

Advance=30deg

above 100Hz

0.413V

– 0.612V

48

1

6.71

Advance=25deg

above 100Hz

0.206V

– 0.406V

40

Default = 0

5.37

Advance=20deg

above 100Hz

0.000V

– 0.200V

32

Table 2a EFF Parameters Selection

Load curves for 4 poles motor