483

π

≤ϕ≤ψ+

π

ϕ−ψ+π ⋅

ψ+

π

≤ϕ≤ψ+

π

−

ϕ−ψ+π

−

ψ+

π

−≤ϕ≤

π

−

ϕ−ψ+π⋅

⋅

=

2

6

2

3

cos 3

6

2

2

3

sin

1

2

2

2

3

4 cos 3

SLF

GDPWM

(

)

(

)

(

)

π

≤ϕ≤

π

ϕ ⋅ −

−

π

≤ϕ≤

π

ϕ +ϕ

π

≤ϕ≤

π

−

ϕ ⋅ −

−

π

−≤ϕ≤

π

−

ϕ −ϕ

π

−≤ϕ≤

π

−

ϕ ⋅ −

+

=

2

3

2

sin 13 1

3

6

2

sin

cos

6

6

2

cos 13 1

6

3

2

sin

cos

3

2

2

sin 13 1

SLF

DPWMMAX

For the angle

ψ

of the SLF

GDPWM

function the following values have to be selected: For

DPWM0 the value 0, for DPWM1 the value

6

π

and for DPWM2 the value

3

π

, as

described above.

SLF as a function of the current phase angle

ϕ

If the individual functions are graphically entered as a function of the current phase

angle

ϕ

, result will be as shown in

It can clearly be seen that the GDPWM

techniques render the lowest SLF. With a flexible modulation algorithm, switching

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