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

Claim 11:
12. The energy conversion device according to claim 10, wherein
the at least two sets of heating circuits comprise an external direct current (DC) charging and discharging port, the winding units in the motor coil and the reversible PWM rectifier, and the external DC charging and discharging port is connected with at least one neutral line led out from the motor coil;
the external power supply is a DC power supply device, and the DC power supply device is connected with the external DC charging and discharging port;
the reversible PWM rectifier comprises a group of M1 bridge arms, and 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 of 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 the other phase windings of the m1 phase windings to form n1 connection points; T1 neutral points are formed by the n1 connection points; J1 neutral lines are led out from the T1 neutral points; n1≥T1≥1; T1≥J1≥1; m1≥2; and n1, m1, M1, T1, and J1 are positive 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 the other phase windings of the m2 phase windings to form n2 connection points; T2 neutral points are formed by the n2 connection points; J2 neutral lines are led out from the T2 neutral points; n2≥T2≥1; T2≥J2≥1; m2≥2; M1≥m1+m2; n2, m2, T2, and J2 are positive integers;
a third heating circuit comprises the DC power supply device, the first winding unit, and the reversible PWM rectifier; and a fourth heating circuit comprises the DC power supply device, the second winding unit, and the reversible PWM rectifier.