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Ballast Demonstrator User Guide

-19

7629A–AVR–04/06

5.2

Pfc_ctrl.c

This file executes the PFC state machine according to the scheduler in the

Main_AT8xEB5114_fluo_demo.c file.

5.2.1

PFC STATE

MACHINE

The PFC state machine functional diagram is shown below:

Figure 5-3.

PFC State Machine Diagram

The different states are outlined below:

INIT_PFC_HAVERSINE_CHECK

Initialize the control valu es of the PFC. This is the initia l state set by the

main_AT8xEB5114_fluo_demo.c file.

Then jump to the HAVERSINE_CHECK state.

HAVERSINE_CHECK

Measure the haversine peak voltage during HAVERSINE_MIN_CHECK_TIME.

Then jump to the PFC_HAVERSINE_CHECK state.

PFC_HAVERSINE_CHECK

PFC haversine peak must be included between HAVERSINE_PEAK_MIN and

HAVERSINE_PEAK_MAX (90VAC and 265VAC).

If the haversine value is OK, set the maximum pulse width allowed and jump to the

CONFIGURE_PFC_SOFT_START state.

Else go back to INIT_PFC_HAVERSINE_CHECK state.

INIT_PFC_HAVERSINE_CHECK

PFC_CONTROL_LOOP

PFC_DELAY_FOR_NEXT_SOFT_START

PFC_SOFT_START

START_PFC_SOFT_START

CONFIGURE_PFC_SOFT_START

HAVERSINE_CHECK

PFC_HAVERSINE_CHECK

g_pfc_time_since_previous_timer_reset <=

HAVERSINE_MIN_CHECK_TIME

HAVERSINE_PEAK_MIN <=gs_v_haversine_peak <=

HAVERSINE_PEAK_MAX

(0.95 * gs_v_haversine_peak) <= gv_v_bus <= V_BUS_SET_POINT

gs_pfc_soft_start_tries <= PFC_START_MAX_TRIES

PFC_PROBLEM

gvs_zcd_occures

Get_v_bus() >= V_BUS_OVERSHOOT

gvs_pfc_soft_start_shots <= PFC_MAX_START_SHOTS

gs_multiplier_pfc_time_since_previous_timer_reset >=

DELAY_MULTIPLIER_FOR_NEXT_PFC_SOFT_START

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