Brake for on-the-fly start-up

KF Lam · ‎2015-10-28

Posted on October 28, 2015 at 19:46

Hi,

According to the user manual UM1080 p.16,

''The duration of the ''braking phase'' that is applied if the sensorless measurements doesn't give reliable measurement during the ''detection phase''. During the ''braking phase'' the motor is brake in order to stop it before the new acceleration.''

However, there are 3 brake strategies, dissipative brake resistor, motor phases short-circuiting & motor phases free-wheeling, in the FOC library. The user manual does not have any detail explanation about the brake strategy being used in the on-the-fly start-up. Below is some questions we'd like to ask.

1. Which brake strategy is being used in the on-the-fly start-up?

2. Can we choose the brake strategy?

3. Any extra circuitry is needed for using the brake feature? If so, would you recommend an evaluation board for our reference.

best regards,

KF Lam

#on-the-fly-start-up #brake

Gigi · ‎2015-10-29

Posted on October 29, 2015 at 12:26

Ciao KF Lam

The braking strategy during ''braking phase'' of the on-the-fly start-up is fixed and is done short-circuiting the motor phases closing the three low side switches.

Ciao

Gigi

KF Lam · ‎2015-10-29

Posted on October 29, 2015 at 17:47

Thx