STEVAL-IHM040V1: 500mA, 3-Ph BLDC, 115/230VAC in or 150 ~ 350VDC in

The STEVAL-IHM040V1 is a 3-phase permanent magnet brushless motor driver designed to drive the motor using either the six-step or field-oriented control (FOC) commutation technique. The board can operate from the AC mains from either 115 or 230 V AC nominal at 50/60 Hz or from a DC input voltage between 150 and 350 V DC. The board can supply a continuous output current of 0.5 A RMS to the motor.

The circuit consists of three main blocks, as shown in Figure 2, Figure 3, and Figure 4. The digital control block uses the STM32F100C8T6 microcontroller to implement the control algorithms and generates the control signals for the power stage. The main outputs of the control block are the signals GAH, GAL, GBH, GBL, GCH, and GCL that are the gate control signals for the power stage. The power stage, second block, is a 3-phase inverter bridge implemented using the STGIPN3H60 SLLIMM™-nano intelligent power module. The SLLIMM includes the 6 IGBTs, gate drivers and level shift required to interface the logic signals from the digital control to the motor terminals. The SLLIMM also provides a hardware overcurrent shutdown and a free op amp used to scale and bias the current sensing. The power supply block uses the VIPer®16L to convert the high voltage DC bus to a regulated 15 V supply that supplies the SLLIMM and analog circuitry on the board. The 15 V supply also supplies an L78L33 linear regulator that provides the 3.3 V logic supply for the microcontroller.

Two firmware control programs are available, one for six-step and one for FOC that run on the same hardware platform.