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Soft start device and soft start method for converter equipment

A soft start and converter technology, applied in the direction of output power conversion devices, electrical components, etc., can solve problems such as low reliability, and achieve the effect of solving large loss, low loss, and satisfactory soft start characteristics

Active Publication Date: 2015-10-21
SHENZHEN HOPEWIND ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is to provide a soft start device for converter equipment, which overcomes the defect of low reliability in the existing DC bus pre-charging soft start scheme

Method used

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  • Soft start device and soft start method for converter equipment
  • Soft start device and soft start method for converter equipment
  • Soft start device and soft start method for converter equipment

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] Embodiment 1 of soft start device for converter equipment

[0038] Such as figure 2 As shown, the soft start device of the converter equipment of the present invention includes a soft start circuit, a voltage detection device 12 and a current detection device 11 . in:

[0039] The voltage detection device 12 is arranged on the DC bus of the converter equipment, and detects or monitors the voltage of the DC bus capacitor 5 of the converter equipment. According to the detection principle of the voltage detection device 12, the voltage detection device 12 can be installed on the DC bus of the converter equipment by means of electrical connection or induction to achieve the purpose of detecting the voltage of the DC bus. The voltage detection device 12 may include, but not limited to, a Hall voltage sensor, a resistance voltage division detection...

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Abstract

The invention discloses a soft start device and a soft start method of converter equipment, wherein the device comprises a soft start circuit, a current detection device and / or a voltage detection device, the soft start circuit comprises a transformer and a low-voltage switch element, the input end of the transformer is connected with a soft start low-voltage power supply through the low-voltage switch element, and the output end of the transformer is connected with the converter equipment to be used for charging a capacitor of a direct current bus of the converter; the current detection device is connected with the input end or the output end of the transformer for detecting the current of the soft start circuit; and the voltage detection device is arranged on the direct current bus of the converter equipment. The method is based on the device to realize the soft starting of the converter equipment, and comprises the steps of detecting the alternating current network voltage and soft start low-voltage power voltage before the soft starting, prejudging soft start conditions, soft starting, monitoring the charge current and direct current bus voltage states, judging the soft start completing conditions, and finishing the soft starting. The soft start device has small impact to a bus capacitor, safer soft starting, and has small loss and low heat.

Description

technical field [0001] The invention relates to a device for realizing soft start of converter equipment, and also relates to a method for using the device to realize soft start of converter equipment. Background technique [0002] With the further improvement of the performance of semiconductor devices, converter equipment has also been more widely used. In the field of new energy industry and motor frequency conversion speed regulation, converter has become an indispensable important equipment. [0003] The impact problem during the start-up process of the converter equipment is an important issue that affects the normal operation of the system and the service life of the converter. With the breakthrough of new energy technology, the power level of production capacity is constantly rising, and the power level of the converter is also rising accordingly. In the case of high voltage and high current (usually referring to voltage above 690V and current above 1000A) Under wor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/36
Inventor 姜珂王志华张凤准
Owner SHENZHEN HOPEWIND ELECTRIC CO LTD
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