Patent ID: 11916504
Assignee: BYD COMPANY LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H  Y | IPC B  H

Claim 10:
11. The energy conversion device according to claim 10, wherein the external power supply is a power battery; the at least two sets of heating circuits are formed by the power battery, the reversible PWM rectifier, and the winding units in the motor coil;
the reversible PWM rectifier comprises a group of M1 bridge arms; a first bus terminal and a second bus terminal are formed by the M1 bridge arms; a positive terminal and a negative terminal of the power battery are respectively connected with the first bus terminal and the second bus terminal; the motor coil comprises a first winding unit and a second winding unit;
the first winding unit comprises a set of m1 phase windings; each of the m1 phase windings comprises n1 coil branches; the n1 coil branches of each phase winding are connected together to form a first phase endpoint; the first phase endpoints of the m1 phase windings are connected in a one-to-one correspondence with midpoints of each m1 bridge arms of the M1 bridge arms; one of the n1 coil branches of each of the m1 phase windings is further connected with one of the n1 coil branches of other phase windings of the m1 phase windings to form n1 connection points; m1≥2; n1≥1; and n1, M1, and m1 are integers;
the second winding unit comprises a set of m2 phase windings; each of the m2 phase windings comprises n2 coil branches; the n2 coil branches of each phase winding are connected together to form a second phase endpoint; the second phase endpoints of the m2 phase windings are connected in a one-to-one correspondence with midpoints of each of m2 bridge arms of the M1 bridge arms; one of the n2 coil branches of each of the m2 phase windings is further connected with one of the n2 coil branches of other phase windings of the m2 phase windings to form n2 connection points; m2≥2; M1≥m1+m2; n2≥1; n2, m2 are integers;
a first heating circuit comprises the power battery, the reversible PWM rectifier, and the first winding unit; and a second heating circuit comprises the power battery, the reversible PWM rectifier, and the second winding unit.