Huawei Technologies Co., Limited

Huawei Digital Power Technologies Co., Ltd.

Shaohua Wang

Fan Zhang

Heping Dai

Lei Zhou

Weiping Liu

Jinhua Chen

Xiang Ge

Huibin Zhu

Xinzhu Wang

Tao Zeng

Pengju Liu

Zhen Qin

Yongtao Liang

Yi Zeng

Chaoqiang Wu

Jianxin Huang

Yuelong Wang

Yang Cheng

Zhao Zhou

Feng Su

Jing Ge

Zhikai Wen

Yanzhong Wang

Dianbo Fu

Zhiguo Tu

Xiaode Yin

Shuliang Yu

A motor rotor includes a wound rotor comprising a rotating shaft, a rotor core, and a plurality of rotor coils. The rotor core is fixedly sleeved on the rotating shaft, a plurality of winding holes surrounding the rotating shaft are provided at intervals on the rotor core, each winding hole penetrates through two ends that are of the rotor core and that are disposed in an axial direction, each rotor coil is wound on hole walls of two adjacent winding holes, and two adjacent rotor coils share one winding hole. A gap is formed between two adjacent rotor coils, a first shaft hole is formed on the rotating shaft, the gap is configured as a first heat dissipation channel connected to the first shaft hole, and the first heat dissipation channel is used for inflow of coolant in the rotating shaft.

Motor rotor, motor, and vehicle

An electrically excited motor drive system is integrated with an on-board charger (OBC), so that a power supply circuit that is in an electric vehicle and that is configured to drive an electrically excited motor can be integrated with an OBC of a dual active bridge (DAB) type. When a control component controls a switch circuit, the electrically excited motor drive system obtained after integration can separately implement a function of the power supply circuit or a function of the charging circuit in different working modes. In addition, when the electrically excited motor drive system is in different working modes, some circuits are further reused through time division. This addresses a problem that the power supply circuit cannot be integrated with the OBC of the DAB type, to reduce circuit complexity and costs of the electric vehicle.

Electrically excited motor drive system integrated with OBC, and electric vehicle

An on-board charging apparatus is provided to implement high-power charging. The on-board charging apparatus includes an alternating current (AC) to direct current (DC) conversion circuit (AC/DC conversion circuit), a power factor correction (PFC) circuit, and a DC/DC conversion circuit. An alternating current terminal of the AC/DC conversion circuit is connected to an alternating current terminal of the PFC circuit. The AC/DC conversion circuit is configured to: receive a first alternating current voltage at the alternating current terminal of the AC/DC conversion circuit, and convert a first component of the first alternating current voltage into a first direct current voltage. The PFC circuit is configured to: convert a second component of the first alternating current voltage into a second direct current voltage. The DC/DC conversion circuit is configured to: convert the first direct current voltage and the second direct current voltage into a third direct current voltage.

On-board charging and discharging apparatus, charging and discharging system thereof, and electric vehicle

According to one aspect of the present disclosure, there is provided an apparatus that includes a battery, a Direct Current (DC) bus connected to the battery, and a DC to DC converter connected to the battery in parallel with the DC bus. A Motor Control Unit (MCU) is connected between the DC to DC converter and an electric motor. An Alternating Current (AC) port is connected to the electric motor. Switches connect the DC bus and an output of the DC to DC converter in series as an input to the MCU in a drive mode and disconnect the DC bus from the MCU in a charge mode.

Integrated charger and motor control system isolated by motor

A memory management method, apparatus, and system are provided. The memory management method is performed by a memory management hardware accelerator, and the memory management hardware accelerator is coupled to an application subsystem and a communications subsystem. The application subsystem is configured to run a main operating system, and the communications subsystem is configured to run a communications operating system. The method includes: obtaining a set of memory addresses corresponding to dynamic memory space allocated by the main operating system to the communications subsystem, where the set of memory addresses includes one or more memory addresses; and sending some memory addresses in the set of memory addresses to a component of the communications subsystem.

Memory management method, apparatus, and system

A power supply device and a power supply method in a data center, and the power supply device includes at least two busbars, where a first busbar of the two busbars is connected to a first battery, a second busbar of the two busbars is connected to a second battery, and a voltage level of the first battery is different from a voltage level of the second battery, and at least one first bidirectional direct current converter configured to connect the first busbar and the second busbar such that the first busbar and the second busbar perform electrical energy transmission using the first bidirectional direct current converter.

Power supply device and power supply method in data center

A three-phase interleave converter with a TSSC includes: a filter circuit, a PFC circuit, a star connection between the filter circuit and the PFC circuit, and a second capacitor; where an output end of the filter circuit is connected to an input end of the PFC circuit by using a conducting wire; the star connection is set on the conducting wire connecting the filter circuit and the PFC circuit; one end of the star connection is connected to the conducting wire and the other end of the star connection is connected to one end of the second capacitor; and the other end of the second capacitoris connected to an input wire. By using the foregoing solution, the number of capacitors is reduced from the original three to one. Therefore, fewer capacitors are used, and the volume is further reduced, thereby increasing the power density.

Three-phase interleave converter with three-state switching cell

The present invention provides a method and apparatus for transmitting control signal of Resilient Packet Ring (RPR) Medium Access Control (MAC), including: encapsulating a control signal of RPR MAC interface to be transmitted into an RPR data frame of predefined format, and directly sending it to a receiving unit through a standard interface. In this invention, an RPR data frame of predefined format is utilized to transmit signals between an RPR MAC and a receiving unit, e.g., an RPR client, via standard interfaces, which may avoid the increase of unstable factors affecting signal transmission and hardware cost caused by the appending of hardware devices in the standard interfaces. Thus, the reliability of signal transmission is enhanced, and the hardware cost of communication system is reduced.

Method and apparatus for transmitting the control signal of resilient packet ring media access control

The present invention discloses a protection switching apparatus for nodes in a Resilient Packet Ring (RPR) network, including: a first switching module, for receiving inner ringlet data and transmitting data to the outer ringlet; a second switching module, for receiving outer ringlet data and transmitting data to the inner ringlet; and when it is in a normal mode, each of the switching modules transmits the received ringlet data to the other switching module connected to itself, and the received ringlet data are transmitted through normal data paths; when protection switching is required and frame boundaries of data are reached, the first and second switching modules directly switch data paths within themselves, and transmit the received ringlet data through WRAP data paths. At the same time, a protection switching method for nodes in an RPR network is provided. This invention is easy to realize, and data path switching is performed at frame boundaries of data transmission, thus no packet will be lost and reliability of RPR network nodes is guaranteed.

Protection switching method and apparatus for nodes in a resilient packet ring network

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Shenzhen, China

Shaohua Wang