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Converters and Bidirectional Converters

A converter and transformer technology, which is applied in the conversion equipment with intermediate conversion to AC, conversion of DC power input to DC power output, high-efficiency power electronic conversion, etc. and other problems to achieve the effect of reducing switching loss

Active Publication Date: 2017-05-03
ORIGIN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the above-mentioned DC-DC converter, there is a problem that when the desired output voltage is reached, turning off the switch of the conversion circuit while the current is still flowing causes switching loss.
In addition, there is the following problem: If the switching unit in the converter is made to correspond to the duty cycle control in order to realize a wide range of input and output voltages and currents, the loss of the transformer will increase. circuit or switching circuit, the circuit and control become complicated

Method used

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  • Converters and Bidirectional Converters
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  • Converters and Bidirectional Converters

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no. 1 approach

[0029] use Figure 1 to Figure 6 , the converter according to the first embodiment of the present invention will be described. figure 1 A configuration diagram showing an inverter according to the first embodiment of the present invention. figure 1 The illustrated converter includes a transformer 11 , a first circuit 1 connected to the primary coil 11 a side of the transformer 11 , a second circuit 2 connected to the secondary coil 11 b side of the transformer 11 , an inductor L, and a control circuit 3 . The above-mentioned converter converts the DC input from the first terminal T1 and the second terminal T2 side into AC and outputs it from the first circuit 1, and converts the AC into DC in the second circuit 2 through the transformer 11 and sends it to the second terminal on the output side. The three terminal T3 and the fourth terminal T4 sides supply power.

[0030] Power from the power supply of the peripheral device is input to the first terminal T1 and the second t...

no. 2 approach

[0080] Figure 11 An electric circuit diagram showing a bidirectional converter according to a second embodiment of the present invention. In the bidirectional converter according to the second embodiment of the present invention, the same components as those of the converter according to the first embodiment are denoted by the same components. Here, configurations and operations different from those of the inverter of the first embodiment will be mainly described.

[0081] In the bidirectional converter of the second embodiment, the second circuit has the same configuration as the first circuit in order to perform bidirectional operation. therefore, Figure 11 Among them, the second circuit 22 is a circuit configuration in which the switching unit is used as the upper and lower arms of the two regions. In addition, the control circuit 23 provides drive signals to the switch units S7 , S8 of the second circuit 22 here. In addition, the first region 12 of the first circuit ...

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Abstract

The invention provides a converter and a bidirectional converter capable of corresponding to a wide range of input and output voltages and currents and reducing switching losses. The converter and the bidirectional converter of the present invention have: a first circuit connected to the primary coil of the transformer; a second circuit connected to the secondary coil of the transformer; and an inductor connected to the primary coil or the secondary coil side of the transformer on the In the first circuit, the switch unit of the first circuit of the upper arm of the first region or the second region of the group and the switch unit of the first circuit of the second region or the lower arm of the first region are in a conductive state, The switch unit of the first circuit connected in parallel with the first capacitor or the second capacitor is turned off first.

Description

technical field [0001] The invention relates to converters and bidirectional converters. Background technique [0002] Generally, a transformer for isolating an input side and an output side is used in a DC-DC converter. In addition, the input DC voltage can be boosted or stepped down and output according to the turn ratio between the input side and the output side of the transformer. As a conventional DC-DC converter, for example, the DC-DC converter of Patent Document 1 uses a step-up transformer 16 . As in Patent Document 1 Figure 4 As shown in (a), the above-mentioned DC-DC converter turns off the second and third switching units 15b and 15c when the first and fourth switching units 15a and 15d are turned on, and reverses the above operation in the next period. , and alternately in each period, thereby generating a high-frequency alternating voltage square wave. The high-frequency AC voltage rectangular wave generated by the above operation is boosted by the transfor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/28H02M1/00
CPCH02M3/33584H02M1/0058Y02B70/10
Inventor 人见基久
Owner ORIGIN CO LTD