Patent ID: 8004139

Claim:
A compressor motor comprising: a rotor; and a stator disposed radially outside of the rotor, the rotor including a rotor core having an axial length L and a diameter D, and a plurality of magnets circumferentially arranged on the rotor core at center angles of equal intervals, each magnet having a thickness t, wherein L/D<0.7, and t>(1×K×N)/(L 1.5 ×D×P), where P is a number of poles, K is 100000, and N is determined by cylinder capacity, i.e., an effective compression capacity of a compression element of a compressor and a refrigerant type and takes a value shown in Tables 1 through 3 below TABLE 1 Cylinder capacity (cc) (with refrigerant R410A) N 5-12 1 12-16 2 16-20 2.5 20-30 3 TABLE 2 Cylinder capacity (cc) (with refrigerant R22A) N 5-18 1 18-23 2 23-29 2.5 29-43 3 TABLE 3 Cylinder capacity (cc) (with refrigerant CO 2 ) N 2-4 3 4-7 4.