DEPARTMENT OF ELECTRICAL POWER ENGINEERING

COLLEGE OF ENGINEERING

POWER ELECTRONICS

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Six Step Three Phase Inverter Example:

The figure above shown is a six step three phase inverter. The load is wye-connected with each phase of the load and a series RL connection.

Determine:

  • Total harmonic distortion (THD) of the load current

Please enter the input value:

DC input: V

Resistance:

ohm
Inductor: mH
Switching Frequency: Hz

The amplitude of load voltage is determined from

see formula for Vn,L-N

The amplitude of each current is determined from

In = Vn /Zn

 

n
Vn,L-N(V)
Zn()
In(A)
In,rms(A)
1
5
7
11
13

 

THDI = = %

Click for explanation of fourier series quantities about n.

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