AN2388 datasheet(35/54 Pages) STMICROELECTRONICS

35 / 54 page

AN2388

Software design

35/54

Figure 31.

PWM interrupt service routine (IFOC control loop)

4.3

Software variables

The following lines show the different variables used in this control software and in the

equations and schemes presented here.

ia, ib, ic

phase currents

ialfa, ibeta

stator current (α,β) components

iq, id

stator current flux and torque component

Flux_ref, Torque_ref

flux and torque command

Teta_cm

rotor flux position

rotor flux speed

imR

magnetizing current

vd, vq

(d, q) components of the stator voltage

valfa, vbeta

(α, β) components of the stator voltage (input of the

SVPWM)

Vn_Vdc

Vn/DC bus voltage

Vn_Vdc_inverse

Constant using in the SVPWM

Vref1, Vref2, Vref3

Voltage reference used for SV sector determination

Sector

sector variable used in SVPWM

t1, t2

time vector application in SVPWM

Time_A, Time_B, Time_C

PWM commutation instant

PWM ISR

Currents Sensing

Clark Transf.

Position/Speed Sensing

Update Flux Angle

Park Transf.

FOC Equations

(Flux Estimator)

Flux & Torque Regulator

Reverse Park Transf.

Sine Generating with

SVPWM Technique

Wait State in

Main Program

AN2388 Datasheet(PDF) 35 Page - STMicroelectronics

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