Motor and energy conversion device thereof

Patent metadata

Field	Value
Publication number	US-2022294380-A1
Application number	US-202017635636-A
Country	US
Kind code	A1
Filing date	Aug 13, 2020
Priority date	Aug 15, 2019
Publication date	Sep 15, 2022
Grant date	—

Abstract

The disclosure provides a motor and an energy conversion device. The motor includes a motor coil having x sets of windings. A number of phases of the x sets of windings is m x . In each of the x sets of windings, each phase winding includes n x coil branches. A first end of each of the n x coil branches is connected with a first end of a coil branch separated from the coil branch by an electrical angle of 360 degrees, to form m x phase endpoints. A second end of each of the n x coil branches of each phase winding is connected with a second end of a coil branch separated from the coil branch by an electrical angle of P*(360*k 1 +360/m x ) degrees to form n x neutral points, n x ≥m x ≥2, n x ≥3, p=±1, 1≤k 1 ≤(n x −1), and m x , n x , and k 1 are integers.

First claim

1 . A motor, comprising a motor coil, wherein the motor coil comprises x sets of windings, x≥1, and x is an integer;
a number of phases of an x th set of windings is m x , the motor is operated by controlling each set of m x -phase windings by a motor vector controller;
in each of the x sets of windings, each phase winding comprises n x coil branches;
a first end of each of the n x coil branches of each phase winding is connected with a first end of a coil branch separated from the coil branch by an electrical angle of 360 degrees, to form m x phase endpoints;
a second end of each of the n x coil branches of each phase winding is further connected with a second end of a coil branch separated from the coil branch by an electrical angle of P*(360*k 1 +360/m x ) degrees, to form n x neutral points; and
n x ≥m x ≥2, n x ≥3, p=±1, 1≤k 1 ≤(n x −1), and m x , n x , and k 1 are integers.

2 . The motor according to claim 1 , wherein in each set of windings, projections of the first end of each of the n x coil branches of each phase winding and the first end of the coil branch separated from the coil branch by the electrical angle of 360 degrees on an end portion of the motor are arranged in a circle, and the first end and the second end of each coil branch are opposite to each other in an axial direction of the motor.

3 . The motor according to claim 1 , wherein when a number m x of phases of each set of windings is equal, projections of second ends of

∑

i
=
1

x

⁢

(

m
x

*

n
x

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coil branches on the end portion of the motor are cyclically arranged in a circle from a 1 st phase to an m x th phase, electrical angles of two coil branches in one phase winding arranged adjacent to each other differ by 360 degrees, and electrical angles of two adjacent coil branches in m x coil branches within a same cycle differ by 360/m x degrees.

4 . A motor, comprising a motor coil, wherein
the motor coil comprises x sets of windings, x≥1, and x is an integer; a number of phases of each of the x sets of windings is in, the x sets of windings comprise x*m phase windings, the motor is operated by controlling each set of m-phase windings by a motor vector controller; in the x*m phase windings, each phase winding comprises n coil branches; each of the n coil branches of each phase winding is connected with a coil branch separated from the coil branch by an electrical angle of 360 degrees, to form x*m phase endpoints; each of the n coil branches of each phase winding is further connected with a coil branch separated from the coil branch by an electrical angle of P*(360*k 2 +360/(x*m)) degrees, to form n neutral points; and n≥x*m, m≥2, n≥3, p=±1, 1≤k 2 ≤(n−1), and m, n, and k 2 are integers.

5 . The motor according to claim 4 , wherein a phase line of a first set of windings is staggered from a phase line of a second set of windings, and a second end of a first coil branch of the first set of windings is connected with a second end of a second coil branch in the second set of windings separated by an electrical angle of P*(360*k 2 +360/(x*m)) degrees from the first coil branch, to form n neutral points.

6 . The motor according to claim 4 , wherein projections of the first end of each of the n coil branches of each phase winding and the first end of the coil branch separated from the coil branch by the electrical angle of 360 degrees on an end portion of the motor are arranged in a circle, and the first end and the second end of each coil branch are opposite to each other in an axial direction of the motor.

7 . The motor according to claim 5 , wherein projections of second ends of m*n coil branches on the end portion of the motor are cyclically arranged in a circle from a 1 st phase to an (x*m)* th phase, electrical angles of two coil branches in one phase winding arranged adjacent to each other differ by 360 degrees, and electrical angles of two adjacent coil branches in x*m coil branches within a same cycle differ by 360/(x*m) degrees.

8 . An energy conversion device, comprising a motor and a reversible pulse-width modulation (PWM) rectifier, wherein:
the motor comprises a motor coil including x sets of windings, wherein x≥1, and x is an integer, a number of phases of an x th set of windings is m x , the motor is operated by controlling each set of m x -phase windings by a motor vector controller; in each of the x sets of windings, each phase winding comprises n x coil branches; a first end of each of the n x coil branches of each phase winding is connected with a first end of a coil branch separated from the coil branch by an electrical angle of 360 degrees, to form m x phase endpoints; a second end of each of the n x coil branches of each phase winding is further connected with a second end of a coil branch separated from the coil branch by an electrical angle of (360*k 1 +360/m x ) degrees, to form n x neutral points; and n x ≥m x ≥2, n x ≥3, p=±1, 1≤k 1 ≤(n x −1), and m x , n x , and k 1 are integers; and a charging circuit or a discharging circuit is formed by an external charging port or a discharging port, and an external battery by using the energy conversion device, a driving circuit is formed by the external battery and the energy conversion device, the motor and the reversible PWM rectifier are both connected with the external charging port or the discharging port, and the reversible PWM rectifier is connected with the external battery.

9 . The energy conversion device according to claim 8 , wherein the reversible PWM rectifier comprises K groups of M x bridge arms, a midpoint of at least one bridge arm in a group of M x bridge arms is connected with a phase endpoint, different phase endpoints are respectively connected to different bridge arms, a first end of each bridge arm in the K groups of M x bridge arms are connected together to form a first bus terminal, and a second end of each bridge arm in the K groups of M x bridge arms are connected together to form a second bus terminal, M x ≥m x , M x ≥m, K≥x, K and M x are both integers; and
the external charging port or the discharging port is connected with a neutral line led out from a neutral point of the motor and the second bus terminal, the first bus terminal is connected with a positive electrode of the external battery, and the second bus terminal is connected with a negative electrode of the external battery.

10 . The energy conversion device according to claim 9 , wherein at least one neutral line is led out from one of the neutral points of each set of windings.

11 . The energy conversion device according to claim 9 , wherein at least two of the neutral points of each set of windings are connected together to lead out at least one neutral line.

12 . The energy conversion device according to claim 10 , wherein the external charging port comprises a direct current (DC) charging port, the DC charging port is connected with at least one neutral point through one neutral line, the DC charging port is further connected with the second bus terminal, and a DC charging circuit for charging the external battery or a DC discharging circuit for charging the

Assignees

• Byd Co Ltd

Inventors

• Xie Feiyue
• Liu Changjiu
• Li Jicheng
• Hu Lei
• Zheng Yihao

Classifications

• H02J7/865

  Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence) · CPC title

• H02J7/02

  for charging batteries from AC mains by converters · CPC title

• H02K3/04 Primary

  Windings characterised by the conductor shape, form or construction, e.g. with bar conductors · CPC title

• H02M1/14

  Arrangements for reducing ripples from DC input or output · CPC title

• H02K3/28

  Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) · CPC title