Middle-high-frequency transformer

A technology of high-frequency transformers and main transformers, applied in transformer/inductor cooling, transformer/inductor cores, transformer/inductor coils/windings/connections, etc. Rectifier diodes are easily damaged, transformer temperature rises and other problems, to achieve the effect of improving water cooling effect, increasing coupling degree, and reducing temperature rise

CN103366932AActive Publication Date: 2013-10-23SHENZHEN HONGBAI TECH IND
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2013-10-23

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Abstract

The invention relates to a water-cooled middle-high-frequency transformer for a resistance welding machine. The invention provides the middle-high-frequency transformer, wherein a main transformer comprises a magnetic core, a primary winding and a secondary winding; the middle part of the primary winding is provided with three to eleven groups of primary coils, each group of primary coils is formed by connecting two coils in series, which have the same number of turns and are wound in the forward and reverse directions, and each group of primary coils is provided with two lead-out terminals; two ends of the primary winding are respectively provided with a group of primary small coils, the two groups of primary small coils are connected in series, the two groups of primary small coils are provided with two lead-out terminals; dotted terminals in all the lead-out terminals in the primary winding are connected mutually, namely the dotted terminals are connected in parallel to form two input terminals of the main transformer; the secondary winding comprises one to five groups of secondary coils and centre taps led out from the secondary coils, dotted terminals in two lead-out terminals of all the secondary coils are connected in parallel to form two lead-out terminals, the two lead-out terminals are respectively connected with diodes and are then combined to form a first output terminal of the main transformer, and the centre taps are used as a second output terminal of the main transformer.
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Description

technical field

[0001] The invention belongs to the field of welding equipment accessories, in particular to a medium-high frequency transformer, in particular to a medium-high frequency transformer using a water-cooled resistance welding machine. Background technique

[0002] Commonly used resistance welding machine power transformers mainly work in AC power frequency, output power frequency AC or power frequency DC, power frequency refers to the frequency of AC power used in industry, and the unit is Hertz (Hz). The iron core is mainly made of silicon steel sheet, which is bulky and heavy. Since the output current is controlled by the conduction angle of the thyristor, its dynamic performance is poor, the control accuracy is not high, and the conversion efficiency of the transformer with low frequency is low. Low, the volume of the transformer needs to be large, and the efficiency of the transformer is high if the frequency is high, and its transformer can be small. [00...

Examples

Embodiment Construction

[0021] The technical solution of the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] The medium and high frequency transformer of this embodiment is composed of two parts, the main transformer and the rectifier radiator, which can be separated. The iron core of the main transformer is composed of two pairs of CD-type nanocrystalline materials, the primary winding is composed of seven sets of primary wire wraps and two sets of primary small wire wraps connected in parallel, and the secondary winding is made of four sets of full-wave rectified water-through copper tubes. As a result, the rectifier radiator is mainly composed of two high-frequency planar diodes and a cooling water channel.

[0023] Refer to attached figure 1 , figure 2 As shown, the main transformer includes two iron cores 10 of CD-type nanocrystalline material, a primary winding and a secondary winding, and the primary w...