UM1561 datasheet(23/39 Pages) STMICROELECTRONICS

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UM1561

Implementation of digital phase locked loop

Doc ID 023556 Rev 1

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Implementation of digital phase locked loop

DQ_PhaseLockedLoop.c:

The .c file defines the DQ PLL implementation for a single-phase inverter. It is used for the

closed loop control in order to estimate the grid angle and to detect the grid voltage before

injecting current.

#include "stm32f10x_lib.h"

#include "Solar_Mul_Div.h"

#include "250WControl.h"

#define STEPS

512

/*number of entries of the sine look up table*/

#define OFFSET

/* Offset for cos(Theta)=sin_cos_Table[index_sin+offset]*/

#define INDUCTANCE_VALUE

//1117----- 34mH in q1.15= 34*10-3*2-15/

#define SAMPLES

256

#define SAMPLING_TIME

(s16)((4096)-1)

SystStatus_t Freq_Control= FREQ_OUT_OF_RANGE;

SystStatus_t GDVoltage = GRID_VOLTAGE_OUT_OF_RANGE;

where:

●

512: is (Number of entries of the sine look-up table).

The following code shows the look-up table with 512 elements in hexadecimal format.

//*********************** 512 elements *********************************

const s16 Sin_Cos_Table[STEPS] = {

//tabella USATA x IL VECTOR

0x0000, 0xFE6E, 0xFCDC, 0xFB4A, 0xF9B9, 0xF827, 0xF696, 0xF505, 0xF375,

0xF1E5, 0xF055, 0xEEC7, 0xED38, 0xEBAB, 0xEA1E, 0xE893,

0xE708, 0xE57E, 0xE3F5, 0xE26D, 0xE0E7, 0xDF61, 0xDDDD, 0xDC5A, 0xDAD8,

0xD958, 0xD7DA, 0xD65D, 0xD4E1, 0xD368, 0xD1EF, 0xD079,

0xCF05, 0xCD92, 0xCC22, 0xCAB3, 0xC946, 0xC7DC, 0xC674, 0xC50E, 0xC3AA,

0xC248, 0xC0E9, 0xBF8D, 0xBE32, 0xBCDB, 0xBB86, 0xBA33,

0xB8E4, 0xB797, 0xB64C, 0xB505, 0xB3C1, 0xB27F, 0xB141, 0xB005, 0xAECD,

0xAD97, 0xAC65, 0xAB36, 0xAA0B, 0xA8E3, 0xA7BE, 0xA69C,

0xA57E, 0xA463, 0xA34C, 0xA239, 0xA129, 0xA01D, 0x9F14, 0x9E0F, 0x9D0E,

0x9C11, 0x9B18, 0x9A23, 0x9931, 0x9843, 0x975A, 0x9674,

0x9593, 0x94B6, 0x93DC, 0x9307, 0x9236, 0x916A, 0x90A1, 0x8FDD, 0x8F1E,

0x8E62, 0x8DAB, 0x8CF9, 0x8C4B, 0x8BA1, 0x8AFC, 0x8A5B,

0x89BF, 0x8927, 0x8894, 0x8806, 0x877C, 0x86F7, 0x8676, 0x85FB, 0x8583,

0x8511, 0x84A3, 0x843B, 0x83D7, 0x8377, 0x831D, 0x82C7,

0x8276, 0x822A, 0x81E3, 0x81A1, 0x8163, 0x812B, 0x80F7, 0x80C8, 0x809E,

0x8079, 0x8059, 0x803E, 0x8028, 0x8017, 0x800A, 0x8003,

0x8000, 0x8003, 0x800A, 0x8017, 0x8028, 0x803E, 0x8059, 0x8079, 0x809E,

0x80C8, 0x80F7, 0x812B, 0x8163, 0x81A1, 0x81E3, 0x822A,

0x8276, 0x82C7, 0x831D, 0x8377, 0x83D7, 0x843B, 0x84A3, 0x8511, 0x8583,

0x85FB, 0x8676, 0x86F7, 0x877C, 0x8806, 0x8894, 0x8927,

0x89BF, 0x8A5B, 0x8AFC, 0x8BA1, 0x8C4B, 0x8CF9, 0x8DAB, 0x8E62, 0x8F1E,

0x8FDD, 0x90A1, 0x916A, 0x9236, 0x9307, 0x93DC, 0x94B6,

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