US-12623562-B2 - Multiplexing topological structure for controlling duplex-winding motor and charging on board charger

US12623562B2US 12623562 B2US12623562 B2US 12623562B2US-12623562-B2

Abstract

The present disclosure discloses a multiplexing topological structure for simultaneously realizing control of a duplex-winding motor and charging of an on board charger. By controlling the connecting and disconnecting state of a specific relay, the bidirectional switching between the control topology of the duplex-winding motor and the charging topology of the on board charger is realized. In the duplex-winding motor control mode, the topology is divided into a battery module, a duplex-winding motor power control module, a duplex-winding motor power control module, a duplex-winding motor winding module and a duplex-winding motor winding module; in the on board charger charging mode, the topological structure is divided into a electric supply module, a PFC inverter circuit module, an inverter module, an isolation transformer module, a rectifier module and a battery module.

Inventors

Feifan JI
Qingyu SONG
Yanjun Li

Assignees

HANGZHOU CITY UNIVERSITY

Dates

Publication Date: 20260512
Application Date: 20240122

Claims (9)

1 . A multiplexing topological structure for controlling a duplex-winding motor and charging an on board charger, comprising: a battery module, a first duplex-winding motor power control module, a first duplex-winding motor winding module, a second duplex-winding motor power control module, a second duplex-winding motor winding module, an electric supply module, a PFC inverter circuit module, an inverter module, an isolation transformer module, and a rectifier module; wherein in a duplex-winding motor control mode, only the battery module, the first duplex-winding motor power control module, the first duplex-winding motor winding module, the second duplex-winding motor power control module and second duplex-winding motor winding module of the multiplexing topological structure are in an operating state; the battery module is configured to simultaneously provide direct-current drive to the first duplex-winding motor power control module and the second duplex-winding motor power control module under control of a switching device, and the first duplex-winding motor power control module and the second duplex-winding motor power control module are configured to simultaneously provide pulse-width modulation (PWM) drive to the first duplex-winding motor winding module and the second duplex-winding motor winding module, respectively; wherein in an on board charger charging mode, only the electric supply module, the PFC inverter circuit module, the inverter module, the isolation transformer module, the rectifier module and the battery module of the multiplexing topological structure are in an operating state; V-phase upper and lower bridge arms and W-phase upper and lower bridge arms of the first duplex-winding motor power control module are configured, under control of the switching device, to form an inverter circuit for inverting an output voltage of a power factor correction (PFC) inverter circuit, V-phase upper and lower bridge arms and W-phase upper and lower bridge arms of the second duplex-winding motor power control module form two-phase bridge arms, the two-phase bridge arms are connected with a second capacitor in the second duplex-winding motor power control module to constitute a rectifier circuit, and the rectifier circuit is configured to rectify a high-frequency alternating current output by an isolation transformer; two-phase windings in the first two-winding motor winding module are connected in series under control of the switching device to constitute a primary side of the isolation transformer, and two-phase windings in the second two-winding motor winding module are connected in series under control of the switching device to constitute a secondary side of the isolation transformer; the isolation transformer module is configured to provide a voltage boost by selecting a number of wire turns of two groups of three-phase windings; and wherein a third switch is provided between an one-phase winding in the first duplex-winding motor winding module and a star connection midpoint; an eighth switch is provided between a midpoint of an one-phase bridge arm in the second duplex-winding motor winding module and an one-phase winding of the second duplex-winding motor winding module; by controlling on-off status of the third switch and the eighth switch, the duplex-winding motor are capable of forming a star connection of windings in the duplex-winding motor control mode, and being connected in series with windings in the on board charger charging mode to form a structural switching of the primary side and the secondary side of the isolation transformer.
2 . The multiplexing topological structure for controlling a duplex-winding motor and charging an on board charger according to claim 1 , wherein when a first switch and a second switch are closed, the battery module is simultaneously connected with the first duplex-winding motor power control module and the second duplex-winding motor power control module to provide direct-current drive to the first duplex-winding motor power control module and the second duplex-winding motor power control module; when a fourth switch and a seventh switch are opened, an input of the electric supply module is shielded.
3 . The multiplexing topological structure for controlling a duplex-winding motor and charging an on board charger according to claim 1 , wherein the first duplex-winding motor power control module and the second duplex-winding motor power control module are configured, under control of the switching device, to form a three-phase inverter circuit structure, and the three-phase inverter circuit structure is configured to output a desired PWM wave under direct current drive of the battery module.
4 . The multiplexing topological structure for controlling a duplex-winding motor and charging an on board charger according to claim 1 , wherein a fifth switch and a ninth switch are provided in an one-phase bridge arm of the second duplex-winding motor power control module, and the second duplex-winding motor power control module is configured to control the fifth switch and the ninth switch to close, so as to connect three-phase inverter bridge arms in parallel.
5 . The multiplexing topological structure for controlling a duplex-winding motor and charging an on board charger according to claim 1 , wherein a fourth switch is provided between an one-phase winding of the first duplex-winding motor winding module and a star connection midpoint; a seventh switch is provided between a midpoint of an one-phase bridge arm in the second duplex-winding motor winding module and an one-phase winding of the second duplex-winding motor winding module; by controlling the fourth switch and the seventh switch to be closed, an electric supply alternating current power is capable of being input in the on board charger charging mode.
6 . The multiplexing topological structure for controlling a duplex-winding motor and charging an on board charger according to claim 1 , wherein a sixth switch and a tenth switch are provided in an one-phase bridge arm of the second duplex-winding motor power control module, and by controlling on-off status of the sixth switch and the tenth switch, the one-phase bridge arm of the second duplex-winding motor power control module is capable of being connected in parallel with an one-phase bridge arm and a first capacitor of the first duplex-winding motor power control module to switch between a three-phase inverter bridge and a PFC inverter circuit bridge structure.
7 . The multiplexing topological structure for controlling a duplex-winding motor and charging an on board charger according to claim 1 , wherein by controlling on-off status of relevant switching devices, two-phase bridge arms among three-phase bridge arms for inverter output in the first duplex-winding motor winding module and a bridge circuit structure of the inverter module in the on board charger charging mode are capable of being switched; by control on-off status of relevant switching devices, two-phase bridge arms among three-phase bridge arms for inverter output in the second duplex-winding motor winding module and a bridge circuit structure of the rectifier module in the on board charger charging mode are capable of being switched.
8 . The multiplexing topological structure for controlling a duplex-winding motor and charging an on board charger according to claim 1 , wherein in the duplex-winding motor control mode: the battery module is configured to simultaneously connect upper and lower ends of three-phase bridge arms of the first duplex-winding motor power control module and the second duplex-winding motor power control module by controlling a first switch and a second switch to be closed to achieve direct current power transmission thereto; the second duplex-winding motor power control module is configured to connect three-phase bridge arms of the second duplex-winding motor power control module by controlling a fifth switch and a ninth switch to be closed, and a sixth switch and a tenth switch to be opened; midpoints of the three-phase bridge arms of the second duplex-winding motor power control module are configured to connect with three-phase windings of the second duplex-winding motor winding module, respectively, by controlling a seventh switch to be closed and an eighth switch to be opened; bridge arms are formed by connecting a power switch tube and a freewheeling diode, and a gate of the power switch tube of each phase bridge arm is controlled for PWM wave output; the second duplex-winding motor winding module consists of a star connection of the three-phase windings; the first duplex-winding motor winding module is configured to dorm a star connection of three-phase windings of the first duplex-winding motor winding module by controlling a third switch to be closed and a fourth switch to be opened.
9 . The multiplexing topological structure for controlling a duplex-winding motor and charging an on board charger according to claim 1 , wherein in the on board charger charging mode: the electric supply module is configured to connect an electric supply to two ends of the PFC inverter circuit module by controlling a fourth switch and a seventh switch to be closed and a first switch and a second switch to be opened, so as to input alternating current power; the PFC inverter circuit module is configured to separate an one-phase winding of the first duplex-winding motor winding module and an one-phase winding of the second duplex-winding motor winding module from a star connection mode by controlling a third switch and an eighth switch to be opened; the PFC inverter circuit module is further configured to control a sixth switch and a tenth switch to be closed, and a fifth switch and a ninth switch to be opened, so that U-phase upper and lower bridge arms and a first capacitor in the first duplex-winding motor power control module and U-phase upper and lower bridge arms in the second duplex-winding motor power control module are combined to constitute the PFC inverter circuit, and the PFC inverter circuit is configured to achieve PFC function by controlling a gate of a power switch tube of each bridge arm.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS The present application is a continuation of International Application No. PCT/CN2022/120259, filed on Sep. 21, 2022, the content of which is incorporated herein by reference in their entirety. TECHNICAL FIELD The present disclosure belongs to the field of motor control and vehicle-mounted charging devices and in particular, to a multiplexing topological structure for simultaneously realizing control of a duplex-winding motor control and charging of an on board charger (OBC). BACKGROUND In recent years, countries all over the world have continuously promoted the development of clean energy and green transportation to cope with the worsening energy crisis and environmental pollution. With the transformation of automobile industry, electric vehicles have gradually become an important direction in the development of modern automobiles, and many countries are actively promoting the popularization of electric vehicles. During the transition period, how to effectively charge electric vehicles is a key problem in solving users' mileage anxiety. At present, the charging of electric vehicles mainly includes two forms: charging piles and on board chargers. The construction of charging piles is not perfect at present, and on board chargers have the advantages of portable charging, which can be used as a transitional state before the large-scale realization of charging piles. Due to the space limitation and cost consideration of electric vehicles, the actual charging efficiency of the on board charger equipped in the vehicle is not high at present. Among the existing technologies, many researchers have also made many explorations on the optimization of on board charger and achieved certain results, but there is still significant room for improvement. Based on this, in view of the above discussion, it is desired to obtain a new alternative solution of on board charger, which can effectively solve the space limitation of electric vehicles, reduce the overall hardware cost, and improve the charging efficiency as much as possible. SUMMARY In view of the shortcomings of the prior art, the object of the present disclosure is to provide a multiplexing topological structure for simultaneously realizing the control of a duplex-winding motor and the charging of a on board charger. According to the present disclosure, a set of hardware equipment is multiplexed to a great extent, and the functional requirements of duplex-winding motor control and on board charger charging are realized at the same time, so that the equipment space is saved and considerable cost advantage is achieved. The object of the present disclosure is achieved through the following technical solution: a multiplexing topological structure for simultaneously realizing the control of a duplex-winding motor and the charging of a on board charger includes: in a control mode of a duplex-winding motor, the multiplexing topology is divided into a battery module, a duplex-winding motor power control module 1, a duplex-winding motor power control module 2, a duplex-winding motor winding module 1 and a duplex-winding motor winding module 2. In the battery module, the anode and cathode of the battery BAT are respectively led out in two paths. One path of the positive electrode HV+ 1 is connected to the upper end of a first capacitor C1 in the duplex-winding motor power control module 1 through a first switch K1, and a connection point 1 is led out to be connected with a sixth switch K6 of the duplex-winding motor power control module 2; the other path of the positive electrode HV− is directly connected to the upper end of a second capacitor C2 in the duplex-winding motor power control module 2. One path of the negative electrode HV− is connected to the lower end of the first capacitor C1 in the duplex-winding motor power control module 1 through a second switch K2, and a connection point 2 is let out to be connected to a tenth switch K10 of the duplex-winding motor power control module 2, and the other path of the negative electrode HV− is directly connected to the lower end of the second capacitor C2 in the duplex-winding motor power control module 2. In the duplex-winding motor power control module 1, the upper and lower ends of the first capacitor C1 are connected with the upper and lower ends of the bridge arms of the three-phase inverter circuit. A basic block of each phase bridge arm is composed of a power switch tube and a freewheeling diode. The basic block UT1 is used as a U-phase upper bridge arm and a basic block UB1 is used as a U-phase lower bridge arm, and the two blocks are connected with each other; the midpoint of the U-phase bridge arm is connected with an one-phase winding La1 of the duplex-winding motor winding module 1. A basic block VT1 is used as a V-phase upper bridge arm, and a basic block VB1 is used as a V-phase lower bridge arm. The two blocks are connected with each other, and the midpoint of the V-phase