Collaboration diagram for Vector Park Transform:

Functions
static void	tpt_park_f32 (f32_t pId, f32_t pIq, f32_t Ialpha, f32_t Ibeta, f32_t aSinVal, f32_t aCosVal)
	Floating-point Park transform. More...

static void	tpt_park_q31 (q31_t pId, q31_t pIq, q31_t Ialpha, q31_t Ibeta, q31_t aSinVal, q31_t aCosVal)
	Q31 Park transform. More...

Detailed Description

Forward Park transform converts the input two-coordinate vector to flux and torque components. The Park transform can be used to realize the transformation of the Ialpha and the Ibeta currents from the stationary to the moving reference frame and control the spatial relationship between the stator vector current and rotor flux vector. If we consider the d axis aligned with the rotor flux, the diagram below shows the current vector and the relationship from the two reference frames:

The function operates on a single sample of data and each call to the function returns the processed output. The library provides separate functions for Q31 and floating-point data types.

Algorithm: where Ialpha and Ibeta are the stator vector components, pId and pIq are rotor vector components and cosVal and sinVal are the cosine and sine values of theta (rotor flux position).

Fixed-Point Behavior: Care must be taken when using the Q31 version of the Park transform. In particular, the overflow and saturation behavior of the accumulator used must be considered. Refer to the function specific documentation below for usage guidelines.

Function Documentation

◆ tpt_park_f32()

static void tpt_park_f32	(	f32_t *	pId,
		f32_t *	pIq,
		f32_t	Ialpha,
		f32_t	Ibeta,
		f32_t	aSinVal,
		f32_t	aCosVal
	)

inlinestatic

Floating-point Park transform.

Parameters

[out]	pId	points to output rotor reference frame d.
[out]	pIq	points to output rotor reference frame q.
[in]	Ialpha	input two-phase vector coordinate alpha
[in]	Ibeta	input two-phase vector coordinate beta
[in]	aSinVal	sine value of rotation angle theta
[in]	aCosVal	cosine value of rotation angle theta

Returns: none

The function implements the forward Park transform.

◆ tpt_park_q31()

static void tpt_park_q31	(	q31_t *	pId,
		q31_t *	pIq,
		q31_t	Ialpha,
		q31_t	Ibeta,
		q31_t	aSinVal,
		q31_t	aCosVal
	)