STEVAL-IHM006V1 Circuit Description

AN2316 - Application Note

8/24

The relationships expressed in

Equation 3 and Equation 4, and Figure 2 show that it is

possible to control power fed to the load by changing the PWM signal duty cycle.

Note:

The load is assumed to be inductive so the high frequency harmonics are filtered in the

current waveform (see Figure 3 on page 9 for system waveform details).

Figure 2.

Basic Working Principal Illustration

Vline

t

Load Current

Duty Cycle Increase

t

Bi-directional PWM Chopping

duty cycle

AI12267