US 12,294,322 B2
Drive system and control method
Takumi Ito, Tokyo (JP)
Assigned to TMEIC CORPORATION, Tokyo (JP)
Appl. No. 18/259,427
Filed by TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION, Tokyo (JP)
PCT Filed Oct. 29, 2021, PCT No. PCT/JP2021/040116
§ 371(c)(1), (2) Date Jun. 27, 2023,
PCT Pub. No. WO2023/073953, PCT Pub. Date May 4, 2023.
Prior Publication US 2024/0120865 A1, Apr. 11, 2024
Int. Cl. H02P 21/18 (2016.01); H02P 21/00 (2016.01); H02P 21/34 (2016.01); H02P 27/06 (2006.01)
CPC H02P 21/18 (2016.02) [H02P 21/0003 (2013.01); H02P 21/34 (2016.02); H02P 27/06 (2013.01); H02P 2207/05 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A drive system comprising:
a first phase estimation unit that generates a first phase obtained by estimating a phase of a rotor on the basis of an initial phase at a startup stage of a synchronous motor;
a second phase estimation unit that generates a second phase obtained by estimating the phase of the rotating rotor on the basis of an operation state of the synchronous motor;
a state determination unit that determines the operation state of the synchronous motor; and
a drive control unit that controls the driving of the synchronous motor by using any one of the first phase and the second phase according to a determination result of the operation state of the synchronous motor,
wherein the first phase estimation unit corrects the first phase by using a detection result of a rotor position detected from a start of a startup procedure of the synchronous motor to successful startup.