Three phase full shunt ammeter evaluation board based on ISOSD61 STM32F413RH | 黑森爾電子
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Three phase full shunt ammeter evaluation board based on ISOSD61 STM32F413RH

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發佈日期: 2022-12-06, STMicroelectronics

     STMicroelectronics EVALST-3PHISOSD Evaluation Board implements a complete 3-phase current meter with low-cost shunt  current sensors. The solution is based on the ISOSD61 device, a single channel, galvanically isolated,  second-order sigma-delta modulator,  measuring current for each phase through a shunt current sensor. Sensing circuitry and PCB layout are optimized to  maximize the signal-to-noise ratio for optimal accuracy.

     The STMicroelectronics ISOSD61 outputs the current sigma-delta bitstreams and oversamples the signal using a clock (up  to 15MHz) distributed synchronized by the microcontroller. The firmware embedded in the solution exploits the DFSDM  filters of the STM32F413RH to convert the three bitstreams into 24-bit current data at a selectable sampling rate. The  firmware also implements a virtual COM port communication to easily access the internal parameters to read data and  calibrate the board.

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