US 12,255,569 B2
Braking methods
Claudio Eduardo Soares, Joinville (BR)
Assigned to NIDEC GLOBAL APPLIANCE BRASIL LTDA., Joinville (BR)
Appl. No. 18/038,676
Filed by NIDEC GLOBAL APPLIANCE BRASIL LTDA., Joinville (BR)
PCT Filed Nov. 23, 2021, PCT No. PCT/BR2021/050512
§ 371(c)(1), (2) Date May 24, 2023,
PCT Pub. No. WO2022/109702, PCT Pub. Date Jun. 2, 2022.
Claims priority of application No. 10 2020 024064 1 (BR), filed on Nov. 25, 2020.
Prior Publication US 2024/0039433 A1, Feb. 1, 2024
Int. Cl. H02P 3/22 (2006.01); H02P 6/182 (2016.01); H02P 6/24 (2006.01)
CPC H02P 3/22 (2013.01) [H02P 6/182 (2013.01); H02P 6/24 (2013.01)] 15 Claims
OG exemplary drawing
 
1. Rheostatic braking method, applied in a BLDC motor (10) used in hermeticos compressors, characterized in that comprises:
selecting a first phase and a second phase, connected to the BLDC motor (10), which will be short-circuited, at a certain electric position of the BLDC motor (10), wherein the first phase and the second phase selected are the phases having the major induced voltage and the minor induced voltage at a certain electric position of the BLDC motor (10);
maintaining a third open phase to monitor the electric position of the BLDC motor (10) by means of monitoring the induced voltage at this third open phase; and
separating the rheostatic braking in six electric positions, each electric position being associated to two electric sections: a first section before zero crossing of the induced voltage of the third open phase; and a second section after the zero crossing.