US 9,813,001 B2
Control device for rotating electric machine
Ryunosuke Akimatsu, Kariya (JP); Tatsuya Tonari, Kariya (JP); and Toshihiro Uchida, Kosai (JP)
Assigned to DENSO CORPORATION, Kariya (JP); and ASMO CO., LTD., Kosai (JP)
Filed by DENSO CORPORATION, Kariya, Aichi-pref. (JP); and ASMO CO., LTD., Kosai, Shizuoka-pref. (JP)
Filed on May 20, 2016, as Appl. No. 15/160,386.
Claims priority of application No. 2015-102664 (JP), filed on May 20, 2015; and application No. 2016-001799 (JP), filed on Jan. 7, 2016.
Prior Publication US 2016/0344314 A1, Nov. 24, 2016
Int. Cl. H03K 5/00 (2006.01); H02P 6/10 (2006.01); H02P 29/50 (2016.01); H02P 6/06 (2006.01); H02P 6/14 (2016.01)
CPC H02P 6/10 (2013.01) [H02P 29/50 (2016.02); H02P 6/06 (2013.01); H02P 6/14 (2013.01); H02P 2209/07 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A control device for a rotating electric machine arranged in a rotating electric machine system, the rotating electric machine system comprising an electric power conversion unit and the rotating electric machine, the rotating electric machine comprising a stator on which phase windings are wound, the electric power conversion unit supplying a drive current to the phase windings of the stator to drive the rotating electric machine, the control device comprising:
a harmonic current calculation section capable of calculating harmonic currents to be superimposed over a fundamental current to be supplied to the phase windings of the stator so as to suppress electromagnetic force components affecting the rotating electric machine;
an operation section capable of operating the electric power conversion unit so that the drive current including the calculated harmonic currents which have been superimposed over the fundamental current flows in the phase windings of the stator,
wherein the harmonic current calculation section calculates the amplitude and phase of the harmonic currents to be superimposed over the fundamental current on the basis of conditions corresponding to a load of the rotating electric machine; and
a judgment section capable of judging conditions of instruction values generated by and transmitted from another control device, wherein
the conditions of the instruction values affect the load of the rotating electric machine,
the harmonic current calculation section calculates the amplitude and phase of the harmonic currents to be superimposed over the fundamental current on the basis of the correlation relationship between the amplitude and phase of the harmonic currents, and the conditions of the fundamental current judged by the judgment section, where the correlation relationship has been determined in advance,
the rotating electric machine forms a fan unit, and the control device uses an air flow mode as the conditions of the instruction values,
the control device uses a set temperature as the conditions of the instruction values,
the judgment section judges an instruction value of a rotation angular velocity of the rotating electric machine generated by and transmitted from the another control device,
the judgment section judges an air flow passage through which the blowing air is supplied from the fan unit on the basis of the air flow mode and the set temperature as the instruction values, and
the control device uses, as the correlation relationships between the conditions of the instruction values and the amplitude and phase of the harmonic currents, a relationship between the air flow passage, the rotation angular velocity of the rotating electric machine and the amplitude of the harmonic currents, and a relationship between the air flow passage, the rotation angular velocity of the rotating electric machine, and the phase of the harmonic currents.