Then, the basic principle and implementation method of SVPWM were elaborated in detail, including the synthesis of space vectors, calculation of duty cycle, and generation of modulation waveforms. Next, by establishing a simulation model, simulation analysis was conducted on the SVPWM vector control ...
0 引言 400 Hz中频电源作为军用雷达、航电设备和部分装甲车辆设备的基准电源之一[1-2],其电能质量水平关乎武器装备性能,中频电源的主要负载为电机类负载,大部分工况下处于不平衡的负载状态,而传统中频电源带不平衡负载能力较弱,稳定性和可靠性较差,因此研究中频逆变电源有很重要的意义。 三相四桥臂逆变拓扑即在传统三...
The whole process from reference voltage input to three-phase PWM output had been completed in two clock cycles with only three triggers in FPGA, which effectively improved the calculation speed. In addition, the resource usage of the hardware architecture with different ...
is located.Afterwards,the seven-segment SVPWM modulation method is used to realize the SVPWM of a,b,and c three-phase voltages.By using the proposed algorithm,the determination of space vector sector and the calculation of duty cycle in SVPWM is simplified and the calculation time ...
Then, the calculation method of switching time is described, which follows the principle of volt-second equilibrium, and calculates the switching time of each small sector with the first large sector as a reference. In the modulation signal generation part, the PWM signal is generated by setting...
of voltage Beta sSVPWM.m_calc(&sSVPWM); // call the SVPWM duty cycles calculation function CCR0 = sSVPWM.fCCRA; // update the duty cycle value in CCR0 CCR1 = sSVPWM.fCCRB; // update the duty cycle value in CCR1 CCR2 = sSVPWM.fCCRC; // update the duty cycle value in CCR2...
The complexity was reduced by avoiding the Clark coordinate transformations and trigonometric function calculation in the conventional SVPWM. The simulation of a three-phase asynchronous motor was built by using the novel SVPWM. The results verify the validity of the algorithm.徐传芳...
Compared with the prior art, the direct current bus voltage Ud and the actual switching time Ts are not needed, calculation is easy and convenient and response is fast in the electrode control process, the detecting error of the direct current bus voltage Ud and the actual switching time Ts ...
Compared with the prior art, the present invention does not require to use the actual DC link voltage Ud and the Ts of the switching time, the electrode simple calculation in the control process, fast response, and determine the parameters of the DC link voltage Ud in the absence of actual...
This study focuses on spectral calculation, by the adoption of 3D Fourier integral, spectral of bidirectional switch duty cycle function, output voltage and input current can be achieved. When analytic spectral solution is obtained, the correspondence between SVPWM and harmonic components is established...