Cost optimized, < 1% accurate current sensing and protection for 3-phase inverter reference design
TIDA-010023
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Key Document

Description

This reference design demonstrates a cost optimized three-phase inverter leg (low-side shunt) current sensing solution with high accuracy and faster response for sensorless 2-shunt or 3-shunt field oriented control (FOC). This reference design demonstrates inverter leg current sensing with full swing response settling time close to 1-µs and accuracy error less than 1%. The design also shows very good noise rejection even with high power IGBTs switching nearby. The design implements overcurrent protection fully in hardware with less than 1.5-µs total response time.

Features
  • Current sensing with < 1.25 µs settling time and < 1% calibrated accuracy enabling accurate current sensing
  • Overcurrent protection fully implemented in hardware with fast response time < 1.5 µs
  • Positive and negative overcurrent protection in all the three inverter legs by using only two comparators
  • Low cost and accurate current sensing for sensorless FOC with dual and triple shunt topologies to minimize torque ripple and audible noise in motor drives

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Schematic/Block Diagram

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Design Files

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TI Devices (7)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
SN74AHC367  Hex Buffers And Line Drivers With 3-State Outputs  Buffer/driver  Sample & Buy View Design Kits & Evaluation Modules
TLV1701  Single high voltage, low power comparator  Amplifiers  Sample & Buy Not Available
TLV9001  1-Channel, 1MHz, RRIO, 1.8V to 5.5V Operational Amplifier for Cost-Optimized Systems  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
TLV9064  4 channel, 10-MHz, Low-Noise, RRIO, CMOS Operational Amplifier for Cost-Sensitive Systems  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
TMS320F28027F  Piccolo™ 32-bit MCU with 60 MHz, 64 KB Flash, InstaSPIN-FOC  Microcontrollers (MCU)  Sample & Buy View Design Kits & Evaluation Modules
TPD1E10B06  Single-channel ESD in 0402 package with 10pF capacitance and 6V breakdown  Circuit protection  Sample & Buy View Design Kits & Evaluation Modules
UCC27712  620-V, 1.8-A, 2.8-A High-Side Low-Side Gate Driver with Interlock  Gate drivers  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
SN74AHC367 Download -
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Download -
Download Download
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TLV1701 Download Download
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TLV9001 Download -
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TLV9064 Download Download
Download Download
Download Download
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TMS320F28027F Download Download
TPD1E10B06 Download Download
UCC27712 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 3539 01 Nov 2018
Design files (6)
Title Type Size (KB) Date
ZIP 825 01 Nov 2018
ZIP 6998 01 Nov 2018
PDF 1592 01 Nov 2018
PDF 779 01 Nov 2018
PDF 36 01 Nov 2018
PDF 492 01 Nov 2018
Related Tools & Software

Reference Designs  ( 2 )

Models (2)

Title Category Type Size (KB) Date Views
TIDA-010023 Current Sensing Simulation TINA-TI Reference Design ZIP 12 KB 01 Nov 2018
TIDA-010023 Overcurrent Protection Simulation TINA-TI Reference Design ZIP 18 KB 01 Nov 2018

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