UM0432 datasheet(44/53 Pages) STMICROELECTRONICS

44 / 53 page

Motor control operations

UM0432

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If during the GUI configuration phase the "from RV1" control was unchecked, the value of

the duty cycle (or the value of the current reference) is not set by P1 but has a fixed value.

If during the GUI configuration phase the "from RV2 - RV3" control was unchecked, the

value of the rising delay coefficient and the value of the falling delay coefficient are not set by

P2 and P3 but have fixed values.

The maximum current allowed by the GUI has been set to 8 A (see Section 7.4.8).

7.6.7

Stopping the motor (LED action)

Push the Start/Stop button to stop the motor. The LEDs toggle from green to red to indicate

an "idle" state.

7.7

Driving the BLAC motor

This section describes how to drive the brushless permanent magnet motor. You should first

check that the board has been set-up for BLAC driving (see Section 7.4.6).

7.7.1

Specific sensor connections

In order to be driven correctly, the motor must have three position sensors, in this case three

hall sensors. For this demonstration we suggest using one Ametek BLDC blower motor

(voltage max 30 Vdc). Refer to the connections in Table 20 to connect the motor to the

power board.

Sets the value of the rising delay coefficient from 0 to 255

Sets the value of the falling delay coefficient from 0 to 255

Not used

Table 19.

Potentiometer functionality based on open/closed loop driving strategy (continued)

Voltage mode

Table 20.

"PMAC sensored" motor connections

Motor

Power board

Phase A (red)

J10 pin 1

Phase B (yellow)

J10 pin 2

Phase C (black)

J10 pin 3

Hall sensor 1 (white)

J14 pin 1

Hall sensor 2 (green)

J14 pin 2

Hall sensor 3 (blue)

J14 pin 3

Hall sensor +5 V (red)

J14 pin 4

Hall ground (black)

J14 pin 5

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