UM0522
Motor control operations
19/39
8
Motor control operations
8.1 Environmental
considerations
Warning:
The STEVAL-IHM015V1 evaluation 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 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. A schematic of this AC power supply is in the application note, "AN438,
TRIAC + microcontroller: safety precautions for development tools." (Although this
application note was written for TRIAC, the isolation constraints still apply for switching
semiconductor devices such as MOFSETs.)
Note:
Isolating the application rather than the oscilloscope is highly recommended in any case.
8.2 Hardware
requirements
To set up the STEVAL-IHM017V1 evaluation board system, the following items are required:
●
The board: STEVAL-IHM017V1
●
High-voltage insulated AC power supply up to 230 Vac
●
Softec inDART-STX (not included in the package)
●
Softec ICC isolation board (not included in the package)
●
Two 10-pin flat cables (not included in the package)
●
3-phase brushless motor with permanet magnet rotor (not included in the package)
●
Insulated oscilloscope (as needed)
●
Insulated multimeter (as needed)
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