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Alternator and rectifier

A technology of rectifying device and rectifying voltage, which is applied in electromechanical devices, AC power input conversion to DC power output, output power conversion devices, etc., can solve the problems of reducing system working efficiency and power loss, and improve work efficiency and power Effect of Loss Reduction

Active Publication Date: 2021-05-18
ACTRON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is to say, in the negative half cycle TN of the rectified voltage, power loss (power loss) will occur, reducing the working efficiency of the system

Method used

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  • Alternator and rectifier
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  • Alternator and rectifier

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Experimental program
Comparison scheme
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Embodiment Construction

[0084] Please refer to figure 2 , figure 2 A schematic diagram showing a rectifying device according to an embodiment of the present invention. The rectifying device 200 includes a transistor TD1 and a gate driving circuit 210 . The transistor TD1 has a first terminal receiving an input voltage VS, a second terminal of the transistor TD1 generates a rectified voltage VD, and a control terminal of the transistor TD1 receives a gate voltage VG. In this embodiment, the operation of the transistor TD1 is equivalent to a diode through the gate voltage VG, the first terminal of the transistor TD1 can be equivalent to the cathode of the diode, and the second terminal of the transistor TD1 can be equivalent to the anode of the diode.

[0085] The gate driving circuit 210 is coupled to the transistor TD1 for providing the gate voltage VG. The gate driving circuit 210 receives the voltage difference VDS between the rectified voltage VD and the input voltage VS, and generates a gate...

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PUM

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Abstract

The invention provides an alternator and a rectifying device. The rectifying device includes a transistor and a gate driving circuit. The control terminal of the transistor receives the gate voltage. The gate driving circuit generates a gate voltage according to the voltage difference between the rectified voltage and the input voltage. The gate driving circuit detects an initial time point when the voltage difference is less than a first preset threshold voltage, and provides a gate voltage to turn on the transistor in a first time interval after the initial time point, and makes the voltage difference equal to a first reference voltage. In the second time interval following the first time interval, the gate driving circuit adjusts the gate voltage to make the voltage difference equal to the second reference voltage.

Description

technical field [0001] The invention relates to an alternator and a rectifying device, in particular to an alternator and a rectifying device capable of reducing power loss. Background technique [0002] In an alternator, a rectifier device is often used to rectify the AC input voltage and produce a rectified voltage that can be considered a DC voltage. In the known technical field, diodes or transistors are often used to rectify the input voltage. Ideally, the rectified voltage should remain equal to the reference voltage (for example, 0 volts) during the negative half cycle, but in actual situations, such as figure 1 As shown in the waveform diagram of the known rectified voltage, the peak value of the rectified voltage is the voltage VP, and in its negative half cycle TN, the voltage value of the rectified voltage will be lower than its reference voltage V0. That is to say, in the negative half cycle TN of the rectified voltage, a phenomenon of power loss (power loss) w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K11/04H02M7/217
CPCH02K11/048H02M7/217
Inventor 陈维忠锺尚书陈宴毅王惠琪
Owner ACTRON TECH