How to operate the STEVAL-IHM029V1
UM0922
16/23
Doc ID 17259 Rev 1
10
How to operate the STEVAL-IHM029V1
The demonstration board can be tested with or without a load. Even if no motor is connected
to the demonstration board, all signals are visible by means of an oscilloscope.
While not required, it is recommended to turn potentiometer P1 to the OFF position before
powering the demonstration board. The STEVAL-IHM029V1 is ready to operate as soon as
it is plugged into the mains.
The output power level is adjusted by using potentiometer P1. Power regulation is broken
into 5 power levels: from 1 (minimum power), to 5 (maximum power). A green LED shows
the current power level.
Turning potentiometer P1 clockwise increments the output power, while turning the
potentiometer P1 counter-clockwise decreases the output power.
While the motor is running, the red LED marked RUN is on to indicate that the MCU is
properly driving the Triac.
Turning potentiometer P1 to the OFF position puts the STEVAL-IHM029V1 in standby mode
(total power consumption below 300 mW).
In the absence of the ZVS signal, the motor control is stopped, and the red LED starts
blinking. Once the ZVS signal is applied again, the motor control is restored.
