JPH0486093U

JPH0486093U -

Info

Publication number: JPH0486093U
Application number: JP12640290U
Authority: JP
Priority date: 1990-11-30
Filing date: 1990-11-30
Publication date: 1992-07-27

Description

[Brief explanation of drawings]

第１図は本考案の一実施例の回路図、第２図な
いし第５図は第１図の動作説明図、第６図は本考
案の第二の実施例の回路図である。１……三相交流電源、３……順変換器、４……
直流リアクトル、６……逆変換器、８……三相誘
導電動機、９……電流指令作成器、１０……出力
電流検出器、１１……出力電流制御回路、１３…
…ベース駆動回路、１５……ＰＷＭパルス演算部
、Ｉｏ……出力電流値、Ｉｏ＊……出力電流指令
、△Ｉ……電流偏差、Ｖ＊……電流指令、ＩＧＢ
Ｔ……絶縁ゲートバイポーラトランジスタ素子、
ｃ……平滑コンデンサ。 FIG. 1 is a circuit diagram of one embodiment of the present invention, FIGS. 2 to 5 are explanatory diagrams of the operation of FIG. 1, and FIG. 6 is a circuit diagram of a second embodiment of the present invention. 1... Three-phase AC power supply, 3... Forward converter, 4...
DC reactor, 6... Inverter, 8... Three-phase induction motor, 9... Current command generator, 10... Output current detector, 11... Output current control circuit, 13...
...Base drive circuit, 15...PWM pulse calculation unit, Io...Output current value, Io*...Output current command, △I...Current deviation, V*...Current command, IGB
T...Insulated gate bipolar transistor element,
c...Smoothing capacitor.

Claims

[Claims for Utility Model Registration] 1. A forward converter that converts AC power into DC power, means for smoothing the output of the converter, a load driven by the output of the forward converter, and a forward converter that converts AC power into DC power. a detector that detects an output; a PWM control section that controls a switching operation of the forward converter; and a PWM control section that operates according to a deviation between a control command that controls the output of the forward converter and the output of the detector. A power conversion device comprising an output control system configured to obtain a required output, wherein the forward converter is configured with an insulated gate bipolar transistor element. 2. The power conversion device according to claim 1, wherein the load includes an inverter that converts DC power into AC power, and a motor driven by the inverter. 3. The power conversion device according to claim 1, wherein the output control system has an open loop control angular frequency set to six times or more the power supply frequency. 4. A forward converter that converts AC power into DC power, means for smoothing the output of the forward converter, a load driven by the output of the forward converter, a detector that detects the output of the forward converter, A PWM control unit that controls a switching operation of the forward converter, and operates the PWM control unit according to a deviation between a control command that controls the output of the forward converter and the output of the detector to obtain a desired output. In a power converter comprising an output control system configured as above, one arm of the forward converter is configured by a series connection of an insulated gate bipolar transistor element and a reverse blocking diode, and the means for smoothing the output is configured by a DC reactor. A current source power converter characterized by: 5. The current source power converter according to claim 4, wherein the load is an inverter configured with an insulated gate bipolar transistor element for converting DC power into AC power, and a motor driven by the inverter. 6. The current source power converter according to claim 4, wherein the output control system has an open loop control angular frequency set to six times or more the power supply frequency. 7 A forward converter that converts AC power into DC power, means for smoothing the output of the forward converter, a load driven by the output of the forward converter, a detector that detects the output of the forward converter, A PWM control unit that controls a switching operation of the forward converter, and operates the PWM control unit according to a deviation between a control command that controls the output of the forward converter and the output of the detector to obtain a desired output. In a power converter comprising an output control system configured as above, one arm of the forward converter is configured with an insulated gate bipolar transistor element and a reverse conduction diode connected in parallel, and the means for smoothing the output is configured with a capacitor. A voltage type power converter characterized by: 8. The voltage type power converter according to claim 7, wherein the load is an inverter configured with an insulated gate bipolar transistor element for converting DC power into AC power, and a motor driven by the inverter. 9. The voltage type power converter according to claim 7, wherein the output control system has an open loop control angular frequency set to six times or more the power supply frequency. 10 forward converter that converts AC power to DC power,
means for smoothing the output of the forward converter; an inverse converter that converts the output of the forward converter into alternating current power; a detector that detects the output of the inverse converter; a PWM control unit; and an output control system configured to operate the PWM control unit according to a deviation between a control command for controlling the output of the inverter and the output of the detector to obtain a desired output. In the voltage type power converter, the inverse converter has one arm configured by an insulated gate bipolar transistor element and a reverse conduction diode connected in parallel, and the means for smoothing the output is configured by a capacitor. 11. The voltage type power converter according to claim 10, wherein the output control system has an open loop control angular frequency set to six times or more the power supply frequency.