Open-winding motor drive topology and modulation method thereof

Patent metadata

Field	Value
Publication number	US-10608571-B2
Application number	US-201816312750-A
Country	US
Kind code	B2
Filing date	Feb 11, 2018
Priority date	Jan 19, 2018
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

The present invention discloses an open-winding motor drive topology and a modulation method thereof. Each bridge arm includes an upper bridge arm power switching device and a lower bridge arm power switching device, an upper node of the upper bridge arm power switching device is connected to a DC bus voltage, a lower node of the lower bridge arm power switching device is connected to a power ground, and a lower node of the upper bridge arm power switching device and an upper node of the lower bridge arm power switching device are connected as an output node of the bridge arm; the output node of the first bridge arm is connected to a left node of a A-phase stator winding of the open-winding motor, the output node of the second bridge arm is connected to a right node of the A-phase stator winding and a left node of a B-phase stator winding of the open-winding motor, the output node of the third bridge arm is connected to a right node of the B-phase stator winding and a left node of a C-phase stator winding of the open-winding motor, and the output node of the fourth bridge arm is connected to a right node of the C-phase stator winding of the open-winding motor. The invention improves the power density of the drive, thereby ensuring the working performance of the motor.

First claim

What is claimed is:

1. An open-winding motor drive topology, characterized by comprising: a first bridge arm, a second bridge arm, a third bridge arm and a fourth bridge arm;
each bridge arm includes an upper bridge arm power switching device and a lower bridge arm power switching device, in which an upper node of the upper bridge arm power switching device is connected to a DC bus voltage, a lower node of the lower bridge arm power switching device is connected to a power ground, and a lower node of the upper bridge arm power switching device and an upper node of the lower bridge arm power switching device are connected as an output node of the bridge arm;
the output node of the first bridge arm is connected to a left node of a A-phase stator winding of the open-winding motor, the output node of the second bridge arm is connected to a right node of the A-phase stator winding and a left node of a B-phase stator winding of the open-winding motor, the output node of the third bridge arm is connected to a right node of the B-phase stator winding and a left node of a C-phase stator winding of the open-winding motor, and the output node of the fourth bridge arm is connected to a right node of the C-phase stator winding of the open-winding motor.

2. The open-winding motor drive topology of claim 1 , characterized in that currents flowing into the respective bridge arms are expressed by stator currents of the stator DC excitation motor:

{

i
1

=

-

i
A

=

-

2

⁢

I

A
⁢

⁢
C

⁢
sin
⁢

⁢
ω
⁢

⁢
t

-

I

D
⁢

⁢
C

i
2

=

i
A

-

i
B

=

6

⁢

I

A
⁢

⁢
C

⁢
sin
⁢

⁢

(

ω
⁢

⁢
t

+

30
⁢
°

)

i
3

=

i
B

-

i
C

=

6

⁢

I

A
⁢

⁢
C

⁢

sin
⁡

(

ω
⁢

⁢
t

-

Assignees

• Univ Huazhong Science Tech

Inventors

• Jiang Dong
• Li An
• Qu Ronghai
• Kong Wubin
• Yu Zixiang

Classifications

• H02P27/08 Primary

  with pulse width modulation · CPC title

• H02P25/18 Primary

  with arrangements for switching the windings, e.g. with mechanical switches or relays · CPC title

• H02P25/22

  Multiple windings; Windings for more than three phases · CPC title

• H02P21/22

  Current control, e.g. using a current control loop · CPC title

• H02K1/00 Primary

  Details of the magnetic circuit (magnetic circuits for relays H01H50/16) · CPC title