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Electric power converter

A power conversion device and power supply technology, which is applied to output power conversion devices, electrical components, and AC power input is converted into AC power output, etc., and can solve problems such as low efficiency.

Inactive Publication Date: 2011-06-22
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the conventional power conversion device, since the current flows through the transistor and the diode, energy loss such as heat generation occurs, and there is a problem of low efficiency.

Method used

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Experimental program
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Embodiment approach 1

[0070] figure 1 It is a block diagram showing the configuration of the power conversion device according to Embodiment 1 of the present invention. Such as figure 1 As shown, the power conversion device according to Embodiment 1 is a device that directly forms a three-phase AC having a predetermined frequency from a single-phase AC power source 100 to supply three-phase power to a load 101 .

[0071] figure 1 Among them, the single-phase AC input waveform generation unit 102 from the single-phase AC power supply 100 is configured such that the phase of the power supply voltage output from the single-phase AC power supply 100 is detected by the power supply phase detection unit 103 . The predetermined three-phase AC electric power generated by the waveform generation unit 102 is supplied to the load 101 . In Embodiment 1, the load 101 is a motor of an inductive load. As will be described later, the waveform generator 102 is composed of a plurality of bidirectional switchi...

Embodiment approach 2

[0095] Figure 9It is a block diagram showing the configuration of a power conversion device according to Embodiment 2 of the present invention. The power conversion device according to Embodiment 2 is an example of a specific configuration of power supply phase detection unit 103 in the power conversion device according to Embodiment 1 described above. In the power conversion device according to Embodiment 2, the power supply phase detection unit 103 is configured as a voltage phase detection unit 105 that detects the voltage phase of the single-phase AC power supply 100 . In addition, in the power conversion device according to the second embodiment, components having the same functions and structures as those in the power conversion device according to the first embodiment are given the same reference numerals, and the detailed description of the components is applied to the first embodiment. instruction of.

[0096] Such as Figure 9 As shown, bidirectional switching de...

Embodiment approach 3

[0105] Figure 10 It is a block diagram showing the configuration of a power conversion device according to Embodiment 3 of the present invention. In Embodiment 3, components having the same functions and structures as those in Embodiments 1 and 2 are denoted by the same reference numerals, and detailed descriptions of the components apply to those in the respective embodiments.

[0106] The power conversion device according to Embodiment 3 is different from the power conversion device according to Embodiment 2 in that the voltage phase detection unit 105 that detects the voltage phase of the single-phase AC power supply 100 is replaced by a current phase detection unit 105 that detects the single-phase AC power supply 100 . The current phase detection part 107.

[0107] Such as Figure 10 As described above, in the power conversion device according to Embodiment 3, the single-phase AC power supply 100 , the three-phase load 101 , and the waveform generator 102 constitute a ...

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Abstract

To provide an electric power converter with which a single-phase AC input-multiphase AC output type direct matrix converter is configured without providing any rectification means, a waveform generation unit (102) is configured by connecting the power line of a single-phase AC power supply (100) to the output line to a multiphase AC load (101) via a two-way switching device. A waveform generationcontrol unit (104) controls the driving of the two-way switching device based on source phase information from a source phase detection unit (103) providing PWM control of the two-way switching device based on a preset command signal.

Description

technical field [0001] The present invention relates to a power conversion device for outputting a multi-phase AC having a predetermined frequency from a single-phase AC power supply. Background technique [0002] As a power conversion device in the prior art, in the drive control device of a synchronous motor disclosed in Japanese Patent Laid-Open Publication No. 11-018489 (Patent Document 1), a power converter with a regulation is directly generated from a three-phase AC power supply without going through a DC stage. Voltage / frequency three-phase AC matrix converter. [0003] Figure 14 It is a circuit diagram showing the configuration of a drive control device as a power conversion device disclosed in Patent Document 1. FIG. Such as Figure 14 As shown, in order to form the three-phase AC input from the three-phase AC power supply 1 into a three-phase AC with a predetermined frequency for driving the synchronous motor 5, the drive control device turns on and off the swit...

Claims

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Application Information

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IPC IPC(8): H02M5/293H02M5/297
CPCH02M5/297
Inventor 小川正则松城英夫福荣贵史
Owner PANASONIC CORP
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