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Flexible switching DC-DC converter with active energy discharging slot

A DC converter, DC voltage technology, applied in the direction of conversion equipment with intermediate conversion to AC, can solve problems such as electromagnetic interference, switching loss of auxiliary switch 207, radio frequency interference, etc.

Inactive Publication Date: 2006-01-25
DELTA ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

so it can be solved figure 1 The switching loss of the main switch 101 and the main diode 104, but the switching loss (when off) of the auxiliary switch 207 itself still exists, and problems such as electromagnetic interference (EMI) and radio frequency interference (RFI) will occur

Method used

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  • Flexible switching DC-DC converter with active energy discharging slot
  • Flexible switching DC-DC converter with active energy discharging slot
  • Flexible switching DC-DC converter with active energy discharging slot

Examples

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Embodiment Construction

[0024] see image 3 , which is a schematic circuit diagram of a flexible switching DC-DC converter with an active energy discharge tank according to the first preferred embodiment of the present invention. Such as image 3 As shown, a DC-DC converter 300 includes: a boost conversion circuit, a resonant circuit 306 , and an active energy discharge tank circuit 307 . The boost conversion circuit is electrically connected to a first DC voltage V1, and uses a main switch 301 to switch on and off to boost the first DC voltage V1 to generate a second DC voltage V2. Wherein, the first DC voltage V1 is obtained by rectifying and filtering an AC power through a full-wave rectifier 302 and a capacitor. As far as the present invention is concerned, the first DC voltage V1 can be a DC voltage with voltage ripple, or It is a smooth DC voltage without voltage ripple.

[0025] The boost conversion circuit also includes a main inductor 303, a main diode 304 and a main capacitor 305. When t...

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PUM

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Abstract

The DC-DC converter includes one boost up converting circuit with one main switch and connected electrically with one first DC voltage to produce one second DC voltage via the on-off switching of the main switch; one resonant circuit comprising one single-way switch, one resonant capacitor and the first winding of one transformer and to make the main switch in the booster converting circuit conduct in one approximately zero voltage; and one active energy discharging slot circuit coupled magnetically to the first winding of the transformer to discharge the energy of the inductor in the transformer to turn off the single-way switch in the resonant circuit in one approximately zero current.

Description

(1) Technical field [0001] The invention relates to a pulse width modulation boost converter, especially a pulse width modulation boost converter using an active energy discharge tank circuit. (2) Background technology [0002] figure 1 It is a known pulse width modulation (PWM) boost converter (Boost Converter) 100 . When a main switch 101 is turned on, a DC power output from a full-wave rectifier 102 accumulates energy on a main inductor 103 , and a main diode 104 is reverse-biased. When the main switch 101 is turned off (off), the load absorbs the electric energy input and stored in the main inductor 103. Assuming that the main capacitor 105 is very large, theoretically, the main switch 101 will be turned on and off quickly and periodically ( on-off), so that the main inductor 103 accumulates energy and replenishes energy to the main capacitor 105 at any time, so that the main capacitor 105 can maintain a constant voltage without being affected by load changes. [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/28
Inventor 詹智强张育铭
Owner DELTA ELECTRONICS INC