UM1491

Using the STEVAL-IHM021V2 with the “STM32 PMSM FOC SDK v3.0” firmware library

Doc ID 022479 Rev 1

19/25

9

Using the STEVAL-IHM021V2 with the “STM32 PMSM

FOC SDK v3.0” firmware library

The

conjunction with STEVAL-IHM021v2 to perform the field-oriented control (FOC) of a

permanent magnet synchronous motor (PMSM) in both sensor and sensorless

configurations.

This section describes how to configure

configuration tool (ST MC Workbench) in order to be compatible with the STEVAL-

IHM021V2.

9.1

Environmental considerations

Warning:

The STEVAL-IHM021V2 demonstration board must only be

used in a power laboratory. The voltage used in the drive

system presents a shock hazard.

The kit is not electrically isolated from the DC input. This topology is very common in motor

drives. The microprocessor is grounded by the integrated ground of the DC bus. The

microprocessor and associated circuitry are hot and MUST be isolated from user controls

and communication interfaces.

Warning:

Any measurement equipment must be isolated from the main

power supply before powering up the motor drive. To use an

oscilloscope with the kit, it is safer to isolate the DC supply

AND the oscilloscope. This prevents a shock from occurring

as a result of touching any single point in the circuit, but

does NOT prevent shocks when touching two or more points

in the circuit.

An isolated AC power supply can be constructed using an isolation transformer and a

variable transformer. An example of an isolation circuit in a Triac-based application is shown

in figure 13. Although this application note was written for Triac, the isolation constraints still

apply for switching semiconductor devices such as MOSFETs.

Note:

Isolating the application rather than the oscilloscope is highly recommended in any case.