Method for multi-machine frequency converter generating synchronization signal, and multi-machine frequency converter

Abstract

Provided are a method for a multi-machine frequency converter generating a synchronization signal, and a multi-machine frequency converter. Provided is a method for a multi-machine frequency converter generating a synchronization signal; said multi-machine frequency converter comprises a master control unit and M1 controllable execution units requiring synchronization; the M1 execution units share a common DC bus, and M1 is an integer greater than 1; the master control unit initializes the relevant parameters of the M1 execution units, and said parameter initialization comprises initializing each system clock and the distributed clocks synchronized by a selected reference clock; after the parameters are initialized, the master control unit sends the initialization data to the M1 execution units, configures an associated register used for synchronized data transmission, and activates the synchronized clock unit of the execution unit, causing the execution unit to generate a synchronization signal. The solution provided by the embodiments of the present invention is conducive to improving the synchronized operation of multi-machine frequency converters.

Description

technical field [0001] The invention mainly relates to the technical field of power electronics, in particular to a method for generating a synchronous signal by a multi-machine frequency converter and the multi-machine frequency converter. Background technique [0002] At present, most inverters on the market are stand-alone inverters, which use a control unit to directly control an inverter unit. The control unit generally does not control the rectification unit. The specific structure can be as follows: Figure 1-a shown. [0003] The stand-alone inverters need to run in parallel synchronously (that is, the speed / torque of the load motors of at least two stand-alone inverters is the same or corresponding, or the outputs of at least two stand-alone inverters are connected in parallel with load motors or asynchronously to realize the factory macro) At the same time, at least two single-machine inverters form an inverter multi-machine system, and the communication between ea...

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Problems solved by technology

[0004] In the process of research and practice, the inventor found that, since multiple single-machine inverters are connected to achieve parallel synchronous operation in the prior art, the multiple single-machine inverters are still relatively independent when working. poor sync performance

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