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Rectifier circuit device

A technology of rectification circuit and AC voltage, applied in the direction of output power conversion device, electrical components, high-efficiency power electronic conversion, etc., can solve problems such as circuit loss

Active Publication Date: 2015-07-01
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the semiconductor switch 3c is driven on / off extremely finely at a frequency sufficiently higher than that of the AC power source 1, the AC voltage of the AC power source 1 is chopping (hereinafter referred to as "semiconductor switch 3c"). Switch chopping operation" or "semiconductor switch chopping"), since the current flows through the semiconductor switch 3c, there is a problem of circuit loss

Method used

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Effect test

Embodiment approach 1

[0155] figure 1 It is a circuit diagram showing the configuration of the rectifier circuit device according to Embodiment 1 of the present invention.

[0156] exist figure 1 In this case, one circuit is formed by short-circuiting two output terminals of a single-phase AC power supply 1 with a semiconductor switch 104 via a reactor 102 . The current detector 103 detects the current of this circuit, and outputs a signal indicating the detected current value Iac to the control circuit 100 . If the semiconductor switch 104 is turned on, the current of the reactor 102 increases. On the other hand, if the semiconductor switch 104 is turned off, the current flowing through the reactor 102 is rectified in the diode bridge 105, and the rectified current flows smoothly. The capacitor 106 and the load 4 drive the load 4 . The DC voltage Vdc across the smoothing capacitor 106 applied to the load 4 is detected by the DC voltage detector 110 , and the DC voltage detector 110 outputs a ...

Embodiment approach 2

[0169] In Embodiment 1, the phase width θw for chopping is detected ON , adjust the DC voltage command Vdc * , and Embodiment 2 is characterized in that the phase width (hereinafter referred to as "chopping stop phase width") θw of the chopping stop state is detected OFF , by adjusting the DC voltage command Vdc, the same effect can be obtained.

[0170] Figure 4A It is a diagram for explaining the control operation of the third operation example of the control circuit 100 of the rectifier circuit device according to Embodiment 2 of the present invention, and shows the relationship between the AC voltage and the rectified DC voltage, the target current waveform to be controlled, and the actual Signal waveform diagram of the controlled AC current. in addition, Figure 4B It is a diagram for explaining the control operation of the fourth operation example of the control circuit 100 of the rectifier circuit device according to Embodiment 2 of the present invention, and shows...

Embodiment approach 3

[0175] The feature of the third embodiment is that the control method of the first embodiment is simplified, and the chopping phase width detector 212 detects a period in which the polarity (sign) of the AC voltage in the chopping stop state does not change and is fixed from 0 degrees or 180 degrees. Phase width θ1w of the first half of (positive interval or negative interval) ON , to perform the chopping control.

[0176] Figure 5A It is a diagram for explaining the control operation of the fifth operation example of the control circuit 100 of the rectifier circuit device according to Embodiment 3 of the present invention, and shows the relationship between the AC voltage and the rectified DC voltage, the target current waveform to be controlled, and the actual Signal waveform diagram of the controlled AC current. in addition, Figure 5B It is a diagram for explaining the control operation of the sixth operation example of the control circuit 100 of the rectifier circuit ...

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Abstract

Disclosed is a rectifier circuit device that, by chopping a semiconductor switch (104), shorts or opens the output terminal of a single-phase AC power source (1) via a reactance, rectifying the AC voltage supplied by the single-phase AC power source (1) via the reactance (102) into a DC voltage and supplying said DC voltage to a load. A control device (100) in said rectifier circuit device: controls the chopping of the semiconductor switch (104) so as to make a detected current waveform match a target current waveform; controls the amplitude of the target current waveform so as to make a detected DC voltage match a prescribed target DC voltage; and controls said prescribed target DC voltage so as to make either the width of a chopping motion phase, which is when the semiconductor switch (104) is in a chopping motion state, or the width of a chopping rest phase, which is when the semiconductor switch (104) is in a chopping rest state, match a prescribed phase width.

Description

technical field [0001] The present invention relates to a rectification circuit device and a control circuit for the above-mentioned rectification circuit device, in particular to a circuit device which rectifies a single-phase AC power supply such as a household to form a substantially direct current, and uses the formed direct current to drive a direct current load; The transformer circuit converts the obtained direct current into alternating current of any frequency again, and drives the motor at a variable speed. For example, it is suitable for using a compressor to compress a refrigerant to form a heat pump, thereby performing cooling, heating or freezing of food, etc. The device of the device is a rectification circuit device for high-efficiency drive control and a rectification circuit device for the above-mentioned rectification circuit device related to the technology of reducing the high-order harmonic components contained in the power supply current and improving the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/12
CPCH02M1/4208Y02B70/126Y02B70/10H02M7/12
Inventor 吉田泉土山吉朗京极章弘戴鑫徽川崎智广
Owner PANASONIC CORP
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