Active rectifier capable of preventing reverse leakage current
First Claim
1. An active rectifier, comprising:
- a rectifier unit comprising;
first and fourth transistors configured to become conductive in an interval in which voltage of an alternating current (AC) input is negative, and to apply current of the AC input to a rectifier capacitor; and
second and third transistors configured to become conductive in an interval in which the voltage of the AC input is positive, and to apply the current of the AC input to the rectifier capacitor;
a driver unit configured to output first to fourth drive control signals to gates of the first to fourth transistors; and
a switching device control circuit unit configured to compare the first drive control signal applied to the gate of the first transistor and the second drive control signal applied to the gate of the second transistor with the AC input, and to output switching device control signals adapted to delay the first to fourth drive control signals based on extents to which the first and second drive control signals are delayed.
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Accused Products
Abstract
Disclosed herein is an active rectifier. The rectifier includes a rectifier unit, a driver unit, and a switching device control circuit unit. The rectifier unit includes first and fourth transistors configured to become conductive when the voltage of an alternating current (AC) input is negative and apply the current of the AC input to a rectifier capacitor, and second and third transistors configured to become conductive when the voltage of the AC input is positive and apply the current of the AC input to the rectifier capacitor. The driver unit outputs first to fourth drive control signals, and drives the first to fourth transistors. The switching device control circuit unit compares the first drive control signal and the second drive control signal with the AC input, and outputs switching device control signals to delay the first to fourth drive control signals based on the extents to delay.
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Citations
9 Claims
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1. An active rectifier, comprising:
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a rectifier unit comprising; first and fourth transistors configured to become conductive in an interval in which voltage of an alternating current (AC) input is negative, and to apply current of the AC input to a rectifier capacitor; and second and third transistors configured to become conductive in an interval in which the voltage of the AC input is positive, and to apply the current of the AC input to the rectifier capacitor; a driver unit configured to output first to fourth drive control signals to gates of the first to fourth transistors; and a switching device control circuit unit configured to compare the first drive control signal applied to the gate of the first transistor and the second drive control signal applied to the gate of the second transistor with the AC input, and to output switching device control signals adapted to delay the first to fourth drive control signals based on extents to which the first and second drive control signals are delayed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification