Double virtual voltage vectors predictive torque control method without weighting factor for five-phase permanent magnet synchronous motor

Patent metadata

Field	Value
Publication number	US-11356045-B2
Application number	US-202017417503-A
Country	US
Kind code	B2
Filing date	Apr 28, 2020
Priority date	Apr 10, 2020
Publication date	Jun 7, 2022
Grant date	Jun 7, 2022

Abstract

A double virtual voltage vectors predictive torque control method without weighting factor for five-phase permanent magnet synchronous motor includes: obtaining the current component in the two-phase stationary coordinate system and the outputting voltage at k interval; one step delay compensation is performed to obtain the current component in the two-phase stationary coordinate system at k+1 interval; predicting the flux and torque of motor at k+1 interval; calculating the reference voltage vector needed by the motor at k+1 interval according to the deadbeat principle and selecting the first virtual voltage vector; selecting the second virtual voltage vector according to the voltage error tracking principle and calculating the duration of the first virtual voltage vector and the second virtual voltage vector respectively and then synthesizing the two vectors and outputting.

First claim

What is claimed is:

1. A double virtual voltage vectors predictive torque control method without a weighting factor for a five-phase permanent magnet synchronous motor, comprising the following steps:
step 1: obtaining current components i k d and i k q in a two-phase stationary coordinate system at a k interval and an outputting voltage component u k d and u k q at the k interval:
step 2: performing a one step delay compensation for step 1 to obtain the current components in the two-phase stationary coordinate system at the k interval further comprising utilizing an Euler forward discretization method to discretize a system equation of the five-phase permanent magnet synchronous motor to obtain:

{

i
d

k
+
1

=

(

1
-

R
s

⁢

T
s

L
d

)

⁢

i
d
k

+

L
q

⁢

T
s

⁢

ω
⁢

q
k

+

T
s

⁢

u
d
k

L
q

i
q

k
+
1

=

-

T
s

⁢

ω
⁢

d
k

+

(

1
-

R
s

⁢

T
s

L
q

)

⁢

i
q
k

+

T
s

⁢

u
q
k

L
q

-

T
s

⁢

ωψ
f

L
g

}

wherein i d k and i q k are the current components in the two-phase stationary coordinate system
at the k interval: i d k+1 and i q k+1 are the current components in the two-phase stationary coordinate system at the k+1 interval: u d k and u q k are the outputting voliage component in the two-phase stationary coordinate system at the k interval; T s , is a control period; ω is an electric angular velocity of a rotor, R s , i

Assignees

• Univ Jiangsu

Inventors

• Zhao Wenxiang
• Wang Huanan
• Tao Tao
• Xu Dezhi

Classifications

• H02P21/30

  Direct torque control [DTC] or field acceleration method [FAM] · CPC title

• H02P25/22

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

• H02P27/08

  with pulse width modulation · CPC title

• H02P27/12

  pulsing by guiding the flux vector, current vector or voltage vector on a circle or a closed curve, e.g. for direct torque control · CPC title

• H02P21/0003

  Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control · CPC title