How can I run the motor both CCW and CW?

[hbch]

Hi,

I run the BLDC well in anti-clockwise with the help of AN4704.

But when I try to run the motor in clockwise,it failed.

How can i run the motor in both direction?

Can anyone give me a tip to modify the source code?

It maybe be an easy work.

The key is MaskVal[6], OutCtl[6], BemfPhase[6].

[marekmusak]

Hi, 

For clockwise direction, please do following modifications:

For motor, please, keep this phase wires connection:

Connector J24, PHASE 1: blue

Connector J24, PHASE 2: white

Connector J24, PHASE 0: green

For Hall sensor, please, keep this wires connection:

Connector J11-1: red

Connector J11-2: black

Connector J11-3: white

Connector J11-4: green

Connector J11-5: blue 

Then, please modify MaskVal[6], OutCtl[6], BemfPhase[6] in software example:

const char MaskVal[2][6]   = {{0x34, 0x1c, 0x13, 0x31, 0x0d, 0x07}, {0x31, 0x13, 0x1c, 0x34, 0x07, 0x0d}};

const char OutCtl[2][6]   = {{0x0c, 0x30, 0x30, 0x03, 0x03, 0x0c}, {0x03, 0x30, 0x30, 0x0c, 0x0c, 0x03}};

const char BemfPhase[2][6] = {{0x03, 0x02, 0x01, 0x03, 0x02, 0x01}, {0x03, 0x01, 0x02, 0x03, 0x01, 0x02}};

const uint8_t BLDCPatternBasedOnHall[2][7] = {{0, 4, 0, 5, 2, 3, 1},{0, 2, 0, 1, 4, 3, 5}};

Use variable "direction" to select CW or CCW and apply BLDCPatternBasedOnHall in function:

INTERRUPT void TIMchan1_ISR(void)

{

   ...

         ActualCmtSector = BLDCPatternBasedOnHall[direction][hallPattern];

   ...

}

void AppAlignmentToStart(void)

{

   ...

         ActualCmtSector = BLDCPatternBasedOnHall[direction][hallPattern];

   ...

}

Last and very IMPORTANT step:

Please, open Jumper J9 otherwise it will affect Hall signal   

Regards,

Marek

[lama]

Hi,

we are sorry for being late.

Your issues is being solved and tested in the application team. It will be read soon.

Best regards,

Ladislav

[hbch]

I got the answer from AN4718.

If CCW sector order is  0-1-2-3-4-5, then CW sector order 3-2-1-0-5-4.

Unfornately, the speed dither at a fixed frequency which responses to the speed.

What's the problem?