Inverter for frequency conversion system of motor

Abstract

The invention relates to an inverter for a frequency conversion system of a motor. The problems of more components, high cost, high failure rate and absence of short-circuit protection of an ordinary inverter are mainly solved. The inverter comprises a rectification and filter circuit, an inverter circuit and a driving circuit for controlling the inverter circuit, wherein the rectification and filter circuit is connected with the inverter circuit; the inverter circuit is a three-phase bridge type circuit consisting of six switches; the driving circuit comprises an intelligent driving module; the intelligent driving module comprises power supply input ends and six control signal output ends; the power supply input ends are connected with an input power supply respectively; the six control signal output ends are connected with the control ends of the six switches of the inverter circuit respectively. The inverter has the advantages that the components are reduced, the space of a circuit board is saved, and the cost is greatly reduced; the components are reduced, so that the production efficiency of a factory is also greatly improved; undervoltage locking and short-circuit protection functions are integrated in the intelligent driving module, so that the shortcomings of an ordinary circuit design are overcome, and high reliability of a product is ensured.

Description

[0001] technical field [0002] The invention relates to an inverter, in particular to an inverter for a motor frequency conversion system with simple circuit structure, few components, low cost and low failure rate. Background technique [0003] The frequency conversion speed regulation system of the AC motor is recognized as an electric drive system with the most superior performance in the AC speed regulation, and has incomparable advantages in speed regulation performance and energy saving. The main circuit of a general-purpose inverter is mainly composed of a rectifier circuit, a filter circuit, an inverter circuit, a control protection circuit, and a display operation. [0004] The basic function of the inverter circuit is to convert the DC power supply into an AC power supply whose frequency and voltage can be adjusted arbitrarily under the control of the drive signal, that is, the output power supply of the inverter. It consists of six switches to form a three-phase...

AI Technical Summary

Problems solved by technology

[0006] The new invention mainly solves the problems of many inverter components, high cost, high failure rate, and lack of short-circuit protection, and provides a circuit structure with simple circuit structure, few components, low cost, low failure rate, and short-circuit protection. Inverter for motor frequency conversion system

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