Current Sensing with <1-us Settling for 1-, 2- & 3-Shunt FOC in 3-Phase Inverter Reference Design

(ACTIVE) TIDA-00778

Description & Features

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Key Document

Description

The TIDA-00778 reference design demonstrates fast and accurate current sensing for a three-phase motor driven with sensorless field-oriented control (FOC). Drives with lower audible noise require faster andaccurate current sensing. The most common low-cost current-sensing methods use a single shunt on the DC bus return path or two to three shunts in the inverter legs. The major challenge in motor control is to enable accurate current sensing even with the lowest active vector duration. TIDA-00778 demonstrates sub-microsecond settling and accurate current sensing in such scenarios. The referencedesign is applicable to major appliances,especially in compressor motors, and the inverter power stage can work up to 2 kW.

Features
  • Fast and accurate current sensing for sensorless FOC with single-, dual-, and triple-shunt topologies to minimize torque ripple and audible noise in motor drives
  • Single-shunt current sensing with minimum settling time and gate driver with lowest propagation delay enable active voltage vector duration < 1 μs
  • Single-shunt DC bus current sensing with < 0.15% calibrated accuracy
  • Dual- and triple-shunt current sensing with < 1.5-μs settling time and < 0.04% calibrated accuracy enabling accurate current sensing at extreme duty cycles
  • Overcurrent detection with response time < 1.5 μs
  • Input voltage 270-V to 390-V DC (rectified from 195-V to 265-V AC)

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TI Devices (7)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
INA303  36V, Bi-Directional, Low-/High-Side, Voltage Output CSA with Window Comparator  Current Sense Amplifiers  Sample & Buy View Design Kits & Evaluation Modules
OPA835  Ultra Low Power, Rail to Rail Out, Negative Rail In, VFB Amplifier  Operational Amplifiers (Op Amps)  Sample & Buy View Design Kits & Evaluation Modules
TLV1701  2.2-V to 36-V, microPower Comparator  Amplifiers  Sample & Buy Not Available
TLV6001  1-MHz, Low-Power Operational Amplifier for Cost-Sensitive Systems  Operational Amplifiers (Op Amps)  Sample & Buy View Design Kits & Evaluation Modules
TLV704  24V Input Voltage, 150mA, Ultra-Low-Iq Low-Dropout (LDO) Regulators  Linear Regulator (LDO)  Sample & Buy View Design Kits & Evaluation Modules
TMS320F28027F  Piccolo™ 32-bit MCU with 60 MHz, 64 KB Flash, InstaSPIN-FOC  C2000 Real-Time Control MCUs  Sample & Buy View Design Kits & Evaluation Modules
UCC27714  High-Speed, 4-A, 600-V High-Side Low-Side Gate Driver  MOSFET and IGBT Gate Drivers  Sample & Buy View Design Kits & Evaluation Modules

Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 2980 09 Mar 2017 148
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 293 29 Mar 2017 5
ZIP 4026 29 Mar 2017 34
PDF 3522 29 Mar 2017 32
PDF 696 29 Mar 2017 25
PDF 60 29 Mar 2017 27
PDF 2020 29 Mar 2017 150
Related Tools & Software

Software (1)

Name Part Number Software Type
MotorWare™ Software  MOTORWARE  Application Software & Frameworks 


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