US 12,294,319 B2
Motor iron-loss calculation device and motor control device comprising same
Shinichi Furutani, Tokyo (JP); and Shoji Adachi, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 18/008,675
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Aug. 5, 2020, PCT No. PCT/JP2020/029927
§ 371(c)(1), (2) Date Dec. 7, 2022,
PCT Pub. No. WO2022/029911, PCT Pub. Date Feb. 10, 2022.
Prior Publication US 2023/0216439 A1, Jul. 6, 2023
Int. Cl. H02P 21/10 (2016.01); G01R 19/00 (2006.01); H02P 21/20 (2016.01); H02P 29/032 (2016.01)
CPC H02P 21/10 (2013.01) [G01R 19/0092 (2013.01); H02P 21/20 (2016.02); H02P 29/032 (2016.02)] 20 Claims
OG exemplary drawing
 
1. A motor iron-loss calculation device configured to calculate an iron-loss value of a motor on the basis of a primary frequency of the motor and a q-axis current component in a dq-axis rotating coordinate system having a d axis in a rotor magnetic flux direction of the motor,
the motor iron-loss calculation device comprising:
a polynomial calculation circuitry in which a polynomial function having the primary frequency as a variable is set in advance, and which receives a coefficient for each term of the polynomial function and the primary frequency, and outputs a calculation result of the polynomial function; and
a coefficient conversion circuitry in which coefficient information for each term of the polynomial function is stored, and which receives the q-axis current component, refers to the coefficient information, and outputs the coefficient for each term of the polynomial function, wherein
the polynomial calculation circuitry substitutes the coefficient outputted from the coefficient conversion circuitry and the primary frequency into the polynomial function, and outputs the calculation result, and
the iron-loss value of the motor is calculated on the basis of the calculation result.