Multi-frequency converter speed regulation device for low-voltage large-power multi-branch AC motor

Abstract

The invention discloses a multi-frequency converter speed regulation device for a low-voltage large-power multi-branch AC motor, which comprises a brushless doubly-fed machine, a motor connection frequency conversion device and an inverting feedback device, wherein the tail end surface of the brushless doubly-fed machine is provided with a manual control switch; the upper end surface of the manual control switch is provided with a hydraulic resistance speed regulator; the outer part of the hydraulic resistance speed regulator is provided with a frequency converter tachometer; the frequency converter tachometer is embedded with a cage winding-type feedback motor; the cage winding-type feedback motor is connected with a rectifier unit output end via a wire; and the lower end of the rectifier unit output end is provided with a first current detection unit. Through reasonably using the motor connection frequency conversion device, various advanced mechanical devices are applied to achieve beneficial effects of high digital degree and good speed adjustment effects, the service life of the machine is prolonged, the structure is simple, the design is reasonable, and mass production is facilitated.

Description

technical field [0001] The invention relates to a frequency converter speed control device, in particular to a multi-frequency converter speed control device for a low-voltage high-power multi-branch AC motor. Background technique [0002] At present, my country's frequency converter speed control device industry is developing rapidly, and the equipment used for frequency converter speed control devices is also diverse, but it still faces challenges in many aspects, and needs to find solutions to meet customers. Application number: 201210090235.5 Chinese patent document reports a rotor frequency conversion speed control device, the specific content is: the present invention relates to the field of frequency converter speed control, in particular to a multi-frequency converter speed control device for low-voltage high-power multi-branch AC motors . The present invention overcomes the problem in the prior art of controlling the drive of the driving mechanism to the baffle to ...

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Problems solved by technology

[0004] In view of this, the present invention provides an automatic rolling machine for bean sticks. The rolling machine realizes the movement of the rolling roller through machinery to solve the problem of low rolling efficiency, high requirements for personnel, large waste of manpower, and the problem of rolling in traditional manual rolling methods. Technical problems such as poor manufacturing quality

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