Bi-directional DCDC converter

Abstract

The invention provides a bi-directional DCDC converter. The bi-directional DCDC converter comprises a transformer, an inductor, a diode, a relay, a controller, a current detection module, a voltage detection module and a field-effect tube, wherein the current detection module is connected with an external first direct-current voltage, and the current detection module is connected to the transformer by virtue of the field-effect tube; the transformer is connected with the relay, and the transformer is connected to an external second direct-current voltage by virtue of the field-effect tube; the second direct-current voltage is connected to an alternating-current load by virtue of an inverter; the relay, the current detection module, the voltage detection module and the field-effect tube are connected with the controller; when direct-current power is transferred by the second direct-current voltage to the first direct-current voltage, the relay is controlled to be turned off, and the pulse width of a PWM signal transmitted by the second direct-current voltage is adjusted; when the direct-current power is transferred by the first direct-current voltage to the second direct-current voltage, the relay is controlled to be turned on, and the pulse width of a PWM signal transmitted by the first direct-current voltage is adjusted.

Description

technical field [0001] The invention relates to a DCDC converter, in particular to a bidirectional DCDC converter. Background technique [0002] With the development of industry, the application of DCDC converters is becoming more and more widespread. However, the existing DCDC converters use different circuits when charging and discharging the battery, which is more complicated, which increases the cost of the product, and the volume is large. Poor reliability; at present, most small-capacity UPS charging circuits use flyback circuits without PFC, and it is not easy to achieve high-current charging. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a bidirectional DC-DC converter with low cost, small volume, balanced positive and negative bus voltages and simple and effective conversion process. [0004] In this regard, the present invention provides a bidirectional DCDC converter, including: a transformer, a rel...

AI Technical Summary

Problems solved by technology

[0002] With the development of industry, the application of DCDC converters is becoming more and more widespread. However, the existing DCDC converters use different circuits when charging and discharging the battery, which is more complicated, which increases the cost of the product, and the volume is large. Poor reliability; at present, most small-capacity UPS charging circuits use flyback circuits, without PFC, it is not easy to achieve high-current charging

Images