UM0432 datasheet(21/53 Pages) STMICROELECTRONICS

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UM0432

Motor control operations

21/53

Motor control operations

7.1

Environmental considerations

Warning:

The STEVAL-IHM015V1 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 serial 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 DC power supply can be constructed using an isolation transformer and a

variable transformer. A schematic of this DC power supply is shown 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.

7.2

Hardware requirements

To set-up the STEVAL-IHM015V1 demonstration board system, the following items are

required.

●

The board itself: STEVAL-IHM015V1

●

An insulated DC power supply up to 24 V, 8 A

●

Softec’s inDART-STX (not included in the package)

●

Softec’s ICC isolation board (not included in the package)

●

Two 10-pin flat cables (not included in the package)

●

A brushless PM motor Ametek (not included in the package)

●

An insulated oscilloscope (as needed)

●

An insulated multimeter (as needed).

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