ZHCSHE0 December 2017 TMS320F28377D-EP
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Industrial Servo Drive and AC Inverter Drive Reference Design
The DesignDRIVE Development Kit is a reference design for a complete industrial drive directly connecting to a three-phase ACI or PMSM motor. Many drive topologies can be created from the combined control, power, and communications technologies included on this single platform. This platform includes multiple position sensor interfaces, diverse current sensing techniques, hot-side partitioning options, and expansion for safety and industrial Ethernet.
Isolated Current Shunt and Voltage Measurement Reference Design for Motor Drives
This evaluation kit and reference design implement the AMC130x reinforced isolated delta-sigma modulators along with integrated Sinc filters in the C2000 TMS320F28377D Delfino microcontroller. The design provides an ability to evaluate the performance of these measurements: three motor currents, three inverter voltages, and the DC Link voltage. Provided in the kit is firmware to configure the Sinc filters, set the PLL frequency, and receive data from Sinc filters. A versatile run-time GUI is also provided to help the user validate the AMC130x performance and supports configuration changes to Sinc filter parameters in the Delfino controller.
Isolated, Shunt-Based Current Sensing Reference Design
This Verified TI Design implements an isolated current sensing data acqusition solution based on the AMC1304M25 isolated delta-sigma (ΔΣ) modulator and a TMS320F28377D microcontroller. This circuit was designed for shunt-based current measurement applications, which require excellent galvanic isolation and accuracy, such as industrial motor drives, photovoltaic inverters, and energy metering. It is capable of measuring load currents from –10 A to +10 A with better than 0.3% uncalibrated accuracy, and it also provides dual functionality of a high-resolution channel and an additional overcurrent or short-circuit detection channel. The design’s functionality and performance were verified against the circuit design goals by fabricating three PCBs and measuring results for dc and ac input signals.
Differential Signal Conditioning Circuit for Current and Voltage Measurement Using Fluxgate Sensors
This design provides a 4-channel signal conditioning solution for differential ADCs integrated into a microcontroller measuring motor current using fluxgate sensors. Also provided is an alternative measurement circuit with external differential SAR ADCs as well as circuits for high-speed overcurrent and earth fault detection. Proper differential signal conditioning improves noise immunity on critical current measurements in motor drives. This reference design can help increase the effective resolution of the analog-to-digital conversion, improving motor drive efficiency.