AP0822

The AP0822 is designed as one kind of three-phase sine wave currents for induction machines with microcontrollers requires a lot of CPU-time, depending on the PWM-frequency and the desired resolution. And this device is programmed in a modular way and due to the CPU-load of only 30 percent, additional sw-tasks (e.g. sw.-control algorithms for a closed-loop system) can be easily realized.

AP0822 need three sinusoidal phase currents - with 120° phase shift to each other - for adequate and smooth rotating. Therefore, so called 'sine wave weighted PWM' is used in this application. For any phase angle, the duty cycle of each PWM signal is generated as a function of the desired sine value.

The implementation of this open-loop induction drive control algorithms with low CPU load shows the first step towards closed-loop control solutions for mid-range applications. The adapted structure of the C504 leads to a very interesting compromise between system costs and its performance. If you want to know more information such as the electrical characteristics about the AP0822,please download the datasheet in www.seekic.com or www.chinaicmart.com .