JP2008048587A - Ac-ac power converter - Google Patents

Ac-ac power converter Download PDF

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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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circuit
power converter
power
output
converter according
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JP2006251688A
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Japanese (ja)
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Norio Onishi
▲徳▼生 大西
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Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems that: there are problems following switching at a PWM converter in a method for reducing a DC circuit capacitor in size by allowing a rectification circuit to perform PWM converter operation, since there is a problem related to a lifetime although a relatively large electrolytic capacitor is used at a DC circuit in the invertor drive or the like of an AC motor; and there are problems that AC switching control becomes complicated in a circuit configuration that allows a matrix converter to perform AC-AC direct conversion for dispensing with a DC capacitor circuit. <P>SOLUTION: An AC-AC power converter performs fixed conduction width control in synchronization with the same power supply as diode rectification from an AC power supply, thus enabling bidirectional power transfer between the AC power supply and an AC output for achieving a configuration without any electrolytic capacitor, to obtain the AC output by a voltage type inverter through a full-wave rectification circuit that can transfer power bidirectionally, and reducing the problems related to the switching at a rectification circuit. <P>COPYRIGHT: (C)2008,JPO&INPIT

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

本発明の交流交流電力変換装置の基本構成例である。It is an example of basic composition of the exchange power converter of the present invention.

符号の説明Explanation of symbols

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 ... Current detector 7 ... Power supply synchronous signal detection circuit 8 ... Power supply synchronous constant conduction width control signal generation part 9 ... PWM control signal generation part

Claims (10)

自己スイッチング素子と逆並列にダイオードを接続したスイッチングアームを用いて構成した電圧形インバータ回路による交流直流電力変換回路と、電圧形インバータ回路を用いた直流交流電力変換回路の両直流回路側を接続し、直流回路にスナバコンデンサ回路を接続して構成した交流交流電力変換回路構成において、交流電源が接続される電圧形インバータ回路のスイッチ信号として全波整流動作信号を与えて交流電源と直流回路間で順逆変換動作を可能とした交流直流電力変換回路の直流出力に接続した電圧形インバータ回路をＰＷＭ制御することにより任意の交流出力を得るて直流回路と交流出力間で逆順変換動作を可能とすることにより、交流電源と交流出力間で双方向電力授受を可能とすることを特徴とする交流交流電力変換装置。Connect the AC / DC power converter circuit using a voltage-type inverter circuit configured using a switching arm with a diode connected in parallel with the self-switching element, and both DC circuit sides of the DC / AC power converter circuit using the voltage-type inverter circuit. In an AC / AC power converter circuit configuration configured by connecting a snubber capacitor circuit to a DC circuit, a full-wave rectification operation signal is given as a switch signal of a voltage source inverter circuit to which the AC power source is connected, between the AC power source and the DC circuit. By applying PWM control to the voltage source inverter circuit connected to the DC output of the AC / DC power converter circuit that enables forward / reverse conversion operation, obtain any AC output and enable reverse / forward conversion operation between the DC circuit and AC output. AC power conversion equipment, which enables bidirectional power transfer between AC power supply and AC output . 請求項１記載の交流交流電力変換装置において、コンデンサと抵抗を直列に接続したスナバコンデンサ回路を接続することを特徴とする交流交流電力変換装置。2. The AC / AC power converter according to claim 1, wherein a snubber capacitor circuit in which a capacitor and a resistor are connected in series is connected. 請求項１記載の交流交流電力変換装置において、コンデンサと抵抗を直列に接続し、抵抗に逆並列にダイオードを接続したスナバコンデンサ回路を接続することを特徴とする交流交流電力変換装置。2. The AC / AC power converter according to claim 1, wherein a snubber capacitor circuit in which a capacitor and a resistor are connected in series and a diode is connected in antiparallel to the resistor is connected. 請求項１〜３記載の交流交流電力変換装置において、電圧形インバータ回路を単相ブリッジ回路で構成して、単相単相交流電力変換動作をさせることを特徴とする交流交流電力変換装置。4. The AC / AC power converter according to claim 1, wherein the voltage source inverter circuit is constituted by a single-phase bridge circuit to perform a single-phase / single-phase AC power conversion operation. 請求項１〜３記載の交流交流電力変換装置において、電圧形インバータ回路を三相ブリッジ回路で構成して、三相三相交流電力変換動作をさせることを特徴とする交流交流電力変換装置。4. The AC / AC power converter according to claim 1, wherein the voltage source inverter circuit is constituted by a three-phase bridge circuit to perform a three-phase / three-phase AC power conversion operation. 請求項１〜５記載の交流交流電力変換装置において、交流電源が接続される電圧形インバータにおいて、ダイオードブリッジ回路で順変換整流動作をする動作区間に対応して並列に接続されたスイッチング素子にオン信号を与えて交流電源と直流回路間で全波整流順逆変換動作を可能としスイッチング回数を抑えることを特徴とする交流直流電力変換回路6. The AC / AC power converter according to claim 1, wherein, in a voltage source inverter to which an AC power supply is connected, the switching elements connected in parallel corresponding to an operation section in which a forward conversion rectification operation is performed in a diode bridge circuit are turned on. An AC / DC power converter circuit that provides full-wave rectification forward / reverse conversion between an AC power supply and a DC circuit by applying a signal and suppresses the number of switching operations. 請求項１〜６記載の交流交流電力変換装置において、交流出力を得る電圧形インバータのＰＷＭ制御信号発生部において、必要とする交流電流が得られるように交流電流が基準電流と一致するように比較制御することを特徴とした交流交流電力変換装置。7. The AC / AC power converter according to claim 1, wherein a comparison is made in the PWM control signal generator of the voltage source inverter for obtaining an AC output so that the AC current matches the reference current so that the required AC current can be obtained. An AC / AC power converter characterized by controlling. 請求項１〜７記載の交流交流電力変換装置において、交流出力を得る電圧形インバータのＰＷＭ制御信号発生部において、直流回路振幅に比例した三角波と出力信号波形を比較することにより、直流電圧振幅変動による出力波形歪みへの影響を低減することを特徴とする交流交流電力変換装置。8. The AC / AC power converter according to claim 1, wherein the PWM control signal generator of the voltage source inverter that obtains the AC output compares the triangular wave proportional to the DC circuit amplitude with the output signal waveform, thereby changing the DC voltage amplitude fluctuation. An AC / AC power converter characterized by reducing the influence on the output waveform distortion caused by AC. 請求項１〜８記載の交流交流電力変換装置において、直流回路に電解コンデンサを接続することなく構成制御することを特徴とする交流交流電力変換装置。9. The AC / AC power converter according to claim 1, wherein the configuration is controlled without connecting an electrolytic capacitor to the DC circuit. 請求項１〜９記載の交流交流電力変換装置において、交流出力側に交流電動機を接続して可逆加減速運転を可能とすることを特徴とする交流交流電力変換装置。10. The AC / AC power converter according to claim 1, wherein an AC motor is connected to the AC output side to enable reversible acceleration / deceleration operation.
JP2006251688A 2006-08-20 2006-08-20 Ac-ac power converter Pending JP2008048587A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014165949A (en) * 2013-02-21 2014-09-08 Mitsubishi Electric Corp Power conversion apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
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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