CN-114513110-B - Motherboard, power conversion method and device

CN114513110BCN 114513110 BCN114513110 BCN 114513110BCN-114513110-B

Abstract

The application provides a motherboard, a power conversion method and a power conversion device, wherein the power conversion device comprises a first power module, a second power module and a controller, each power module consists of a signal processor and a corresponding power converter, the signal processor in the first power module sends a generated first carrier signal to the signal processor in the second power module, the signal processor in the second power module determines a second carrier signal by using the period of the first carrier signal, so that the power converters in the first power module are driven by using the first carrier signal, the power converters in the second power module are driven by using the second carrier signal, the working efficiency of devices in the power conversion process is improved, and the power loss is reduced.

Inventors

CAI YI
YU HUA
DU CHANGLEI
LIU XIAOYU

Assignees

华为数字能源技术有限公司

Dates

Publication Date: 20260512
Application Date: 20220120

Claims (12)

1. The power conversion device is characterized by comprising a first power module, a second power module and a controller; each power module comprises a signal processor and a power converter, wherein the signal processor is connected with the power converter; The controller is used for controlling the signal processor in each power module to be in a working state; A signal processor in the first power module for generating a first carrier signal, driving a connected power converter based on the first carrier signal, and transmitting the first carrier signal to a signal processor in the second power module; the power converter in the first power module is used for carrying out power conversion processing on input first current or first voltage by utilizing the first carrier signal and outputting the first current or the first voltage after conversion processing; The signal processor in the second power module is used for receiving the first carrier signal and determining the period of the first carrier signal, generating a third carrier signal, and carrying out phase locking on the third carrier signal according to the period of the first carrier signal and a target phase difference to obtain a second carrier signal, wherein the target phase difference is determined according to the number of the power modules; And the power converter in the second power module is used for carrying out power conversion processing on the input second current or second voltage by utilizing the second carrier signal and outputting the second current or the second voltage after conversion processing.
2. The power conversion device of claim 1, wherein the signal processor in the second power module comprises: The control loop is used for determining an initial reference phase according to the period of the first carrier signal and the number of the power modules, generating a reference signal according to the reference phase, and transmitting the reference signal to the signal superposition module; The signal superposition module is used for superposing the reference signal and the third carrier signal to obtain a superposition signal, judging whether the phase difference between the superposition signal and the first carrier signal is equal to the target phase difference, when the phase difference between the superposition signal and the first carrier signal is not equal to the target phase difference, feeding back the current phase difference between the superposition signal and the first carrier signal to the control loop, and when the phase difference between the superposition signal and the first carrier signal is equal to the target phase difference, sending the superposition signal as the second carrier signal to a power converter in the second power module; The control loop is further used for correcting the reference phase according to the current phase difference between the superimposed signal received from the signal superimposing module and the first carrier signal, and continuously generating the reference signal according to the corrected reference phase.
3. The power conversion device according to claim 1 or 2, wherein the first power module is a master power module and the second power module is a slave power module; The signal processor in the first power module is further configured to: Before the first carrier signal is sent to a signal processor in the second power module, the address of the first carrier signal is determined to be the set main power module address.
4. The power conversion device according to claim 1 or 2, wherein the number of the first power modules is one, and the number of the second power modules is a plurality.
5. The power conversion device of claim 3, wherein the number of first power modules is one and the number of second power modules is a plurality.
6. The power conversion device according to claim 1 or 2, wherein the controller is in communication interaction with the signal processor in each power module via at least one of the following communication interfaces: Serial peripheral interface SPI, general purpose input/output GPIO interface, bidirectional two-wire serial bus I2C interface, controller area network CAN interface.
7. The power conversion device of claim 3, wherein the controller is communicatively interfaced with the signal processor in each power module via at least one of: Serial peripheral interface SPI, general purpose input/output GPIO interface, bidirectional two-wire serial bus I2C interface, controller area network CAN interface.
8. The power conversion device of claim 4, wherein the controller is communicatively interfaced with the signal processor in each power module via at least one of: Serial peripheral interface SPI, general purpose input/output GPIO interface, bidirectional two-wire serial bus I2C interface, controller area network CAN interface.
9. The power conversion device of claim 5, wherein the controller is communicatively interfaced with the signal processor in each power module via at least one of: Serial peripheral interface SPI, general purpose input/output GPIO interface, bidirectional two-wire serial bus I2C interface, controller area network CAN interface.
10. A motherboard comprising a power conversion device according to any of claims 1-9, wherein the controller in the power conversion device is soldered to the motherboard, each power module being connected to the motherboard by a pin.
11. A power conversion method for use in a power conversion apparatus according to any one of claims 1 to 9, the method comprising: the signal processor in the second power module receives a first carrier signal sent by the signal processor in the first power module and determines the period of the first carrier signal, wherein the first carrier signal is generated by the signal processor in the first power module; The signal processor in the second power module generates a third carrier signal, the third carrier signal is phase-locked according to the period of the first carrier signal and a target phase difference, and the second carrier signal is obtained, so that the power converter in the second power module can perform power conversion processing on input second current or second voltage by using the second carrier signal, the second current after conversion processing or the second voltage after conversion processing is output, and the target phase difference is determined according to the number of the power modules.
12. The power conversion method according to claim 11, wherein the signal processor in the second power module performs phase locking on the third carrier signal according to the period of the first carrier signal and a target phase difference, to obtain the second carrier signal, including: The signal processor in the second power module determines an initial reference phase according to the period of the first carrier signal and the number of the power modules; The signal processor in the second power module is used for superposing the reference signal and the third carrier signal to obtain a superposition signal, judging whether the phase difference between the superposition signal and the first carrier signal is equal to the target phase difference or not, and when the current phase difference between the superposition signal and the first carrier signal is not equal to the target phase difference, feeding back the current phase difference between the superposition signal and the first carrier signal to the reference phase to correct the reference phase; And when the phase difference between the superimposed signal and the first carrier signal is equal to the target phase difference, taking the superimposed signal as the second carrier signal.

Description

Motherboard, power conversion method and device Technical Field The present application relates to the field of electrical energy conversion technologies, and in particular, to a motherboard, a power conversion method and a device. Background Currently, for devices that need to perform power conversion, in order to meet the application scenario of high power output, most of the devices that do not use single-path power conversion, and an existing motherboard is installed with a signal processor and multiple paths of power conversion. The output power of the power conversion device is increased by adopting a mode of parallelly connecting multiple paths of power conversion. In general, multiple paths of power conversion on a motherboard are driven by multiple carrier signals generated by multiple timers in a signal processor, and multiple timers in the same signal processor can easily generate associated signals, so that carrier signals distributed in the multiple paths of power conversion can be adjusted according to the associated signals. However, when the carrier signals distributed by the same signal processor are used for driving the corresponding power conversion, the related signals generated by a plurality of timers in the same signal processor easily cause the driving process of some power conversion to be forcedly changed, so that the working efficiency of devices in the power conversion process is low and the power loss is high. Disclosure of Invention In view of the above, the present application provides a motherboard, a power conversion method and a device, so as to improve the working efficiency of devices in the power conversion process and reduce the power loss. The application provides a power conversion device which comprises a first power module, a second power module and a controller, wherein each power module comprises a signal processor and a power converter, the signal processor is connected with the power converter, the controller is connected with the signal processor in each power module, the controller is used for controlling the signal processor in each power module to be in an operating state, the signal processor in the first power module is used for generating a first carrier signal, driving the connected power converter based on the first carrier signal and sending the first carrier signal to the signal processor in the second power module, the power converter in the first power module is used for carrying out power conversion processing on input first current or first voltage by using the first carrier signal, the signal processor in the second power module is used for receiving the first carrier signal and determining the period of the first carrier signal, and the signal processor in the second power module is used for carrying out power conversion processing on input first current or first voltage after the second carrier signal is converted by using the second carrier signal. Compared with the prior art that a signal processor is used for controlling multi-path power conversion, the power conversion device comprises the first power module, the second power module and the controller, wherein each power module consists of one signal processor and a corresponding power converter, the signal processor in the first power module sends a generated first carrier signal to the signal processor in the second power module, the signal processor in the second power module determines a second carrier signal by using the period of the first carrier signal, so that the power converter in the first power module is driven by using the first carrier signal, the power converter in the second power module is driven by using the second carrier signal, the working efficiency of devices in the power conversion process is improved, and the power loss is reduced. In one possible design, the signal processor in the second power module is specifically configured to generate a third carrier signal, phase-lock the third carrier signal according to the period of the first carrier signal and a target phase difference, so as to obtain the second carrier signal, where the target phase difference is determined according to the number of power modules. After the target phase difference is determined through the number of the power modules, the third carrier signal is phase-locked according to the period of the first carrier signal and the target phase difference, so that a fixed target phase difference exists between the second carrier signal obtained after phase locking and the first carrier signal, and further, the power converter in the first power module is based on the power output by the first carrier signal and the power converter in the second power module is based on the fixed target phase difference between the power output by the second carrier signal, the fixed phase difference between the power output by different power modules is ensured, and the situation that indexes such as output ripple,