Save to MyST

3-phase 6-step control

In a 6-step, or scalar control, normally only the frequency and magnitude of the voltage fed to the motor are controlled while current feedback is not mandatory.

Permanent magnet 3-phase motors

For permanent magnet 3-phase motors (BLDC, PMSM) rotor speed and/or position information is required in order to keep stator and rotor flux positions synchronous. In cases where the rotor speed/position is obtained without using physical sensors (Hall, encoders, etc.) the drive is referred to as sensorless. A six-step drive (also known as block commutation) is one of the most common scalar drives available for both permanent magnet synchronous motors (PMSM) and brushless DC (BLDC) motors, due to the ease with which sensorless control can be achieved. Additionally, when a 6-step drive is in current mode the amplitude of the motor current can be controlled, allowing the motor torque to be regulated. As scalar drives do not require complex mathematical computations, they can be implemented on cost-effective microcontrollers (starting from 8-bit).

All Hardware Evaluation Tools

    • Part Number
      Description
      Core product
      Tool Type
      Supplier
      Sort by: part number

      EVALSTDRIVE101

      Active

      STDRIVE101 demonstration board for three-phase brushless motors

      STDRIVE101 Motor control ST
      EVALSTDRIVE101
      Active

      STDRIVE101 demonstration board for three-phase brushless motors

      EVLSPIN32G4-ACT

      Active

      STSPIN32G4 reference design for next generation smart actuators

      STSPIN32G4 Motor control ST
      EVLSPIN32G4-ACT
      Active

      STSPIN32G4 reference design for next generation smart actuators

      STDES-PTOOL3A

      Active

      Compact, configurable and customizable reference design for battery-operated brushless power tools based on STM32G431 and STDRIVE101

      STDRIVE101 Motor control ST
      STDES-PTOOL3A
      Active

      Compact, configurable and customizable reference design for battery-operated brushless power tools based on STM32G431 and STDRIVE101

      STEVAL-FTD01KCB

      Evaluation

      1.5 kW, 400 Vdc fault tolerant six-phase motor drive

      STGB20M65DF2 Motor control ST
      STEVAL-FTD01KCB
      Evaluation

      1.5 kW, 400 Vdc fault tolerant six-phase motor drive

      STEVAL-PTOOL4A

      Target

      Compact, customizable and configurable reference design for battery operated BLDC/PMSM power tools based on STM32G473 and STDRIVE 101

      STDRIVE101 Motor control ST
      STEVAL-PTOOL4A
      Target

      Compact, customizable and configurable reference design for battery operated BLDC/PMSM power tools based on STM32G473 and STDRIVE 101

      STEVAL-TTM005A

      Active

      Resolver board reading for motor position estimation

      - Motor control ST
      STEVAL-TTM005A
      Active

      Resolver board reading for motor position estimation