UM0432 datasheet(42/53 Pages) STMICROELECTRONICS

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Motor control operations

UM0432

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Also change the following define in the mtc.h file:

#define mem_MCRC_GE ((u8)71)

7.6

Driving the BLDC motor (trapezoidal - sensored)

This section describes how to drive the brushless permanent magnet motor with three hall

60° sensors. First you should check that the board has been set-up for BLDC 60° sensor

driving (see Section 7.4.4).

7.6.1

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).

Use the connections described in Table 17 to connect the motor to the power board.

7.6.2

Specific jumper settings

Set-up the board following the instructions in Section 7.4.12 (bus voltage between 9 and 28

V) and Section 7.4.13.

Set-up the board as per Table 18.

7.6.3

LED action after power-on

Turn on the power supply. For this demonstration, the power supply output voltage should be

set to 20 Vdc and the current limitation of the power supply should be set to 4 A.

Table 17.

"BLDC 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 +5V (red)

J14 pin 4

Hall ground (black)

J14 pin 5

Table 18.

BLDC SR jumper settings

Driving mode

Jumper settings

BLDC_3PH_SR

J11 open, J12 open, J13 between 2-3

J15 open, J16 open, J17 between 2-3

J18 open, J19 open, J20 between 2-3

J3 closed, J4 variable (2-3)

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