V0.3

Here some pictures and information about V0.3 of Open-BLDC

Features

• Sensors
  • Voltage sensing on all three phases
  • Current sensing on two phases
  • Supply rail voltage sensing
  • Comparator for hardware based BEMF zero crossing detection
• Interfaces
  • UART (TTL level RS232 interface)
  • CAN (Controller Area Network)
  • I2C (Inter-Integrated Circuit)
• Three board stack allowing easy changes and different revisions of hardware

Changes from V0.2

• Added virtual star point resistor network
• Added comparator for hardware based BEMF zero crossing detection
• Split out gate driver circuitry to a separate board
• Changed the huge D2Pak mosfets to an array of tiny power33 ones
• Added big rail stabilization capacitors
• Added quadrature encoder connector
• The logic board now expects all input signals to be in the 0V-5V range (for compatibility to logic boards that can only do 5V
• Updated and refined inter board connector pinout
• Added additional i2c interface from logic board to power driver and powerstage
• Added i2c eeprom on the power driver board for storing powerstage calibration information

Gallery

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  Open-BLDC v0.3 full rear view
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  Open-BLDC v0.3 full front view
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  Open-BLDC v0.3 powerstage driver
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  Open-BLDC v0.3 powerstage top view
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  Open-BLDC v0.3 powerstage bottom view
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  Open-BLDC v0.3 powerstage driver bottom view
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  Open-BLDC v0.3 powerstage driver top view
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  Open-BLDC v0.3 logic bottom view
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  Open-BLDC v0.3 top view
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  Open-BLDC v0.3 heatsinks top and bottom view
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  Open-BLDC v0.3 heatsink top view
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  Open-BLDC v0.3 heatsink bottom view