Contemporary Amperex Technology (Hong Kong) Limited

Contemporary Amperex Technology Co., Ltd.

Yuan Yao

Yu Yan

Weichen He

Zhimin Dan

Jinfeng Gao

Guiying Lin

Huaisen Zhang

Meng Li

Xiyang Zuo

Xiao Wang

Chunfa Wang

Yanming Zhao

This application discloses an electrical system and an electrical apparatus. The electrical system includes: a first-stage conversion module including a plurality of first controllable switches; a second-stage conversion module including a plurality of second controllable switches; a first digital signal processor configured to control the first controllable switch; and a second digital signal processor configured to control the second controllable switch, where a first output crossbar switch of the first digital signal processor is configured to supply a first internal signal to a first output port, so that the second digital signal processor receives the first internal signal within a preset time through a second input port. The internal signal of the first digital signal processor can be enabled to be transmitted to the second digital signal processor within a relatively short time, thereby reducing a time interval for triggering a protection action between the two digital signal processors.

Two-stage electrical controlling system and electrical apparatus

System and method for testing power conversion devices are provided. A power supply grid is connected to an AC terminal of a first power conversion device, the power supply grid is also connected to an AC terminal of the second power conversion device, and a DC terminal of the first power conversion device is connected to a DC terminal of the second power conversion device. In this way, a test loop is formed by the power supply grid, the first power conversion device and the second power conversion device. In this test loop, the first power conversion device and the second power conversion device act as a load and a power source, so no additional DC power supply and load are required during the test.

Test system and method for power conversion devices, electronic device, and storage medium

An isolated resonant conversion control apparatus includes a voltage and current obtaining unit configured to obtain an output voltage and an output current of an output-side switch transistor of an isolated resonant conversion unit, and a processing unit configured to calculate a switching frequency of an input-side switch transistor of the isolated resonant conversion unit based on the output voltage and the output current, obtain a turn-on offset time and a turn-off offset time of the output-side switch transistor relative to the input-side switch transistor based on the switching frequency of the input-side switch transistor, obtain a duty ratio of a second driving signal based on a duty ratio of a first driving signal, the turn-on offset time, and the turn-off offset time, and generate the second driving signal based on the switching frequency and the duty ratio of the second driving signal.

Isolated resonant conversion control method, apparatus and system, and readable storage medium based on switching frequency of input-side switch transistor

A switching circuit includes a switching transistor, a metal unit, and a branch. The metal unit is provided at the switching transistor, and the branch is electrically connected between a ground and at least one of the switching transistor or between the metal unit. The branch includes a capacitor, and the capacitor is configured to discharge radiated interference.

Switching circuit and power supply device

A voltage conversion circuit includes an N-level conversion unit and N−1 DC-DC conversion units. The N-level conversion unit includes N output terminals at different levels. A first input terminal of an MDC-DC conversion unit is connected to an Moutput terminal of the N-level conversion unit, and a second input terminal of the MDC-DC conversion unit is connected to an (M+1)output terminal of the N-level conversion unit. An output level of the Moutput terminal and an output level of the (M+1)output terminal are adjacent levels. N and M are positive integers and satisfy N≥3 and 1≤M<N.

Voltage conversion circuit, charging apparatus, and electric device

The present application relates to a method and apparatus of power distribution control for power module and a power module device. The method includes: obtaining temperature data of target devices in two or more power modules; analyzing whether the power modules are operating at full power when the temperature data of the target devices meets a preset temperature fault condition; and adjusting operating parameters of the power modules based on the temperature data when the power modules are not operating at full power.

Growing community of inventors

Ningde, China

Yuan Yao