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Single-damper single-resistor star-connection non-vibration brake frequency conversion device

A technology of star connection and frequency conversion device, which is applied in the direction of deceleration device of AC motor, AC motor control, output power conversion device, etc., which can solve the problem of motor temperature, noise and vibration increase, frequency converter easy to overvoltage or overcurrent trip , complex issues such as control

Inactive Publication Date: 2014-02-12
成都进界科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] To sum up, the disadvantages of traditional inverter braking technology are: complex control, serious increase in motor temperature, noise and vibration, and easy overvoltage or overcurrent tripping of the inverter during braking

Method used

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  • Single-damper single-resistor star-connection non-vibration brake frequency conversion device
  • Single-damper single-resistor star-connection non-vibration brake frequency conversion device

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with accompanying drawing:

[0019] Such as figure 1 and figure 2 As shown, the single-damping and single-resistance star-connected vibration-free braking frequency conversion device of the present invention includes a frequency converter, and the frequency converter includes a power supply circuit, a rectification circuit, an inverter circuit, a main control circuit, a drive circuit, a voltage sampling circuit and In the current sampling circuit, the input terminal of the rectifier circuit is connected to the three live wires R, S, T of the three-phase power supply, the output terminal of the rectifier circuit is connected to the input terminal of the inverter circuit, the three-phase output terminal of the inverter circuit is connected to the three-phase wire of the load motor M The input terminals U, V and W of the phase power supply are connected. The voltage sampling circuit and the current samp...

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Abstract

The invention discloses a single-damper single-resistor star-connection non-vibration brake frequency conversion device which comprises a frequency converter. The frequency converter comprises a power circuit, a rectifying circuit, an inverter circuit, a main control circuit, a driving circuit, a voltage sampling circuit and a current sampling circuit. The single-damper single-resistor star-connection non-vibration brake frequency conversion device further comprises a damping circuit and an electromagnetic valve. The three output ends of the damping circuit are connected with the electromagnetic valve in series and connected with the three output ends of the inverter circuit correspondingly, and the control input end of the electromagnetic valve is connected with the damping control signal output end of the main control circuit. The damping circuit comprises three resistors, one end of each resistor is connected with one end of another resistor, and the other ends of the three resistors respectively serve as the three output ends of the damping circuit. According to the single-damper single-resistor star-connection non-vibration brake frequency conversion device, the resistors in the damping circuit are used for consuming energy at the output ends, namely the load ends, of the inverter circuit so as to achieve the braking purpose, and no vibration, no noise, no overvoltage, no overcurrent and no temperature rise exists in the braking process. The single-damper single-resistor star-connection non-vibration brake frequency conversion device is an upgraded product of a traditional frequency converter.

Description

technical field [0001] The invention relates to a frequency conversion device, in particular to a single-damping and single-resistance star connection vibration-free braking frequency conversion device improved on the basis of a traditional frequency converter. Background technique [0002] Frequency converters are widely used in the field of industrial control, especially cascaded high-voltage frequency converters, which are important equipment for industrial control and speed regulation of high-power motors. Frequency converters and motors form a frequency conversion speed control system. [0003] Many inverter-driven motor applications require a braking function, that is, the ability to stop quickly and reduce speed quickly. This also includes fast shutdown applications for fans and pumps. In order to improve production efficiency, many steel mills put forward high requirements on the braking capacity of frequency converters. For example, the working cycle of a furnace ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/453H02P3/22H02P27/06
Inventor 吕娜
Owner 成都进界科技服务有限公司
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