Space vector limitation
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uz_3ph_dq_t uz_CurrentControl_SpaceVector_Limitation(uz_3ph_dq_t v_input_Volts, float V_dc_volts, float max_modulation_index, float omega_el_rad_per_sec, uz_3ph_dq_t i_actual_Ampere, bool *ext_clamping)
function to limit the voltages of a give control algorithm
- Parameters
v_input_Volts – uz_dq_t struct with the voltages, which shall be limited
V_dc_volts – DC-link voltage
max_modulation_index – Max possible modulation index for the chosen modulation method. I.e. 1/sqrt(3) for Space-Vector-Modulation. Must be greater than 0.0f
omega_el_rad_per_sec – electrical rotational speed in rad/s
i_actual_Ampere – uz_dq_t struct for measured dq-currents in Ampere
ext_clamping – flag which states, if the SVL is active
- Returns
uz_dq_t
Example
1#include "uz/uz_CurrentControl/uz_space_vector_limitation.h"
2int main(void) {
3 float V_dc_volts = 24.0f;
4 float omega_el_rad_per_sec = 100.0f;
5 uz_3ph_dq_t i_actual_Ampere = {.d = 1.0f, .q = 2.0f, .zero = 0.0f};
6 uz_3ph_dq_t v_input_Volts = {.d = 5.0f, .q = 8.0f, .zero = 0.0f};
7 bool ext_clamping = false;
8 float max_modulation_index = 1.0f / sqrtf(3.0f);
9 struct uz_3ph_dq_t output = uz_CurrentControl_SpaceVector_Limitation(v_input_Volts, V_dc_volts, max_modulation_index, omega_el_rad_per_sec, i_actual_Ampere, &ext_clamping);
10}
Description
Limits the input voltages according to the following flowchart. Further information can be found in 1 . This function is already included in the CurrentControl.
Fig. 76 space vector limitation flow chart
Sources
- 1
Vector Control of Three-Phase AC Machines, Nguyen Phung Quang, Jörg-Andreas Dittrich, Springer, ISBN 978-3-662-46914-9