JP2008048587A - Ac-ac power converter - Google Patents
Ac-ac power converter Download PDFInfo
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- JP2008048587A JP2008048587A JP2006251688A JP2006251688A JP2008048587A JP 2008048587 A JP2008048587 A JP 2008048587A JP 2006251688 A JP2006251688 A JP 2006251688A JP 2006251688 A JP2006251688 A JP 2006251688A JP 2008048587 A JP2008048587 A JP 2008048587A
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Abstract
Description
本発明は、交流電動機を可逆可変速運転する場合、インバータの直流回路に通常必要とされる電解コンデンサを用いないでインバータを構成制御することを特徴とする交流交流電力変換装置に関する。 The present invention relates to an AC / AC power converter characterized in that when an AC motor is operated reversibly at a variable speed, the inverter is configured and controlled without using an electrolytic capacitor that is normally required for the DC circuit of the inverter.
インバータの寿命に電解コンデンサは大きく影響を与えるために、これを除くための対策として、交流電源から正弦波PWMコンバータ動作により直流出力を得てからPWMインバータで交流出力を得る方法と、交流電源と交流出力間を交流スイッチ回路を切り替えてスイッチング制御するマトリクスコンバータ動作により交流出力を得る方法がある。 Since the electrolytic capacitor greatly affects the life of the inverter, as a measure to eliminate this, a method of obtaining the DC output from the AC power source by the sinusoidal PWM converter operation and then obtaining the AC output by the PWM inverter, There is a method of obtaining an AC output by a matrix converter operation in which an AC switch circuit is switched by switching between AC outputs.
交流電源から直流出力を得るPWMコンバータ部では、PWMスイッチング制御のために、スイッチング制御回路が複雑で、スイッチング損失を伴う問題がある。 In a PWM converter unit that obtains a DC output from an AC power supply, the switching control circuit is complicated for PWM switching control, and there is a problem with switching loss.
一方、マトリックスコンバータは回路構成が複雑で、スイッチ切り替えにおける交流回路インダクタンスに蓄えられたエネルギー処理を適切に行わないと、スイッチング素子を壊すおそれがあり、交流回路をスイッチング切り替えするための制御回路、制御動作が極めて複雑である。 On the other hand, the matrix converter has a complicated circuit configuration, and if the energy processing stored in the AC circuit inductance in switching the switch is not properly performed, the switching element may be damaged. The operation is extremely complicated.
さらに、マトリックスコンバータの交流スイッチ回路を構成する上で、逆耐圧を有するスイッチング素子が必要で、逆耐圧のダイオードを直列に接続すると順方向電圧降下が高くなり、効率の低下を招く問題がある。 Furthermore, when configuring an AC switch circuit of a matrix converter, a switching element having a reverse withstand voltage is required. When reverse-withstand voltage diodes are connected in series, a forward voltage drop increases, leading to a reduction in efficiency.
本発明の交流交流電力変換回路は、交流電源から直流出力を得る整流部では、ダイオードブリッジ整流動作と同じ期間だけ対応するスイッチング素子を通電制御するために、スイッチングノイズの発生やスイッチング損失等スイッチングに伴う問題を低減することができる。 The AC / AC power conversion circuit according to the present invention is a switching circuit for generating switching noise and switching loss in order to control energization of the switching element corresponding to the same period as the diode bridge rectification operation in the rectification unit that obtains DC output from the AC power supply. The associated problems can be reduced.
本発明は、交流電源から、ダイオードブリッジ整流回路と同じスイッチング動作信号を与えることにより、順逆変換可能な全波整流動作により得られた直流電源に対してPWMインバータ制御により、交流電源と交流負荷間で双方向電力授受可能な交流出力を得ることにより、直流回路部での電解コンデンサを不要とすると共に、交流電源に接続される整流回路部におけるスイッチング損失の抑えた交流交流電力変換装置を提供することを目的とする。 The present invention provides the same switching operation signal as that of the diode bridge rectifier circuit from an AC power supply, and the PWM power supply controls the DC power supply obtained by the full-wave rectification operation capable of forward / reverse conversion between the AC power supply and the AC load. An AC / AC power converter that eliminates the need for an electrolytic capacitor in a DC circuit unit and suppresses switching loss in a rectifier circuit unit connected to an AC power supply is provided by obtaining an AC output that can exchange bidirectional power with For the purpose.
資料1 Reference 1
1…交流回路(交流電源)
2…交流負荷
3…電圧形インバータ回路(電圧形コンバータ)
4…電圧形インバータ回路
5…スナバー回路(コンデンサと抵抗回路)
6…電流検出器
7…電源同期信号検出回路
8…電源同期一定通流幅制御信号発生部
9…PWM制御信号発生部1 ... AC circuit (AC power supply)
2… AC load 3… Voltage source inverter circuit (voltage source converter)
4 ... Voltage source inverter circuit 5 ... Snubber circuit (capacitor and resistor circuit)
DESCRIPTION OF SYMBOLS 6 ...
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006251688A JP2008048587A (en) | 2006-08-20 | 2006-08-20 | Ac-ac power converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006251688A JP2008048587A (en) | 2006-08-20 | 2006-08-20 | Ac-ac power converter |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2008048587A true JP2008048587A (en) | 2008-02-28 |
Family
ID=39181768
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006251688A Pending JP2008048587A (en) | 2006-08-20 | 2006-08-20 | Ac-ac power converter |
Country Status (1)
Country | Link |
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JP (1) | JP2008048587A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014165949A (en) * | 2013-02-21 | 2014-09-08 | Mitsubishi Electric Corp | Power conversion apparatus |
-
2006
- 2006-08-20 JP JP2006251688A patent/JP2008048587A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014165949A (en) * | 2013-02-21 | 2014-09-08 | Mitsubishi Electric Corp | Power conversion apparatus |
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