JPH0644317Y2 - Inverter device - Google Patents

Inverter device

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Publication number
JPH0644317Y2
JPH0644317Y2 JP493685U JP493685U JPH0644317Y2 JP H0644317 Y2 JPH0644317 Y2 JP H0644317Y2 JP 493685 U JP493685 U JP 493685U JP 493685 U JP493685 U JP 493685U JP H0644317 Y2 JPH0644317 Y2 JP H0644317Y2
Authority
JP
Japan
Prior art keywords
phase
circuit
output
power supply
transformer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP493685U
Other languages
Japanese (ja)
Other versions
JPS61123693U (en
Inventor
悦男 硲口
誠 山田
文夫 安富
和博 平塚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
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Filing date
Publication date
Application filed by Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP493685U priority Critical patent/JPH0644317Y2/en
Publication of JPS61123693U publication Critical patent/JPS61123693U/ja
Application granted granted Critical
Publication of JPH0644317Y2 publication Critical patent/JPH0644317Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【考案の詳細な説明】 〔産業上の利用分野〕 この考案は、複数個のスイツチング素子をオン,オフに
より所定電圧,所定周波数の3相交流を出力するインバ
ータ装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an inverter device which outputs a three-phase alternating current of a predetermined voltage and a predetermined frequency by turning on and off a plurality of switching elements.

〔従来の技術〕[Conventional technology]

一般に、複数個のスイツチング素子のオン,オフにより
所定電圧,所定周波数の3相交流を出力するインバータ
装置は、たとえば第3図に示すように構成されている。
同図において、(1a)〜(1c)は3相交流電源(図示せ
ず)のR相,S相,T相の各出力端子に接続された第1〜第
3端子、(2)は入力端子が第1〜第3端子(1a)〜
(1c)に接続され前記3相交流電源の出力を整流するダ
イオードからなる3相全波整流回路、(3)は整流回路
(2)の正,負出力端子間に設けられ整流回路(2)か
らの脈流を平滑する平滑コンデンサ、(4a)〜(4f)は
スイツチング素子であるNPN型の第1〜第6トランジス
タであり、第1〜第3トランジスタ(4a)〜(4c)のコ
レクタが整流回路(2)の正出力端子に接続され、第4
〜第6トランジスタ(4d)〜(4f)のエミツタが整流回
路(2)の負出力端子に接続されるとともに、第1〜第
3トランジスタ(4a)〜(4c)のエミツタそれぞれと第
4〜第6トランジスタ(4d)〜(4f)のコレクタそれぞ
れとが接続され、各トランジスタ(4a)〜(4f)のオ
ン,オフにより、整流回路(2),コンデンサ(3)か
らの直流が3相交流に変換され、出力端子である第1〜
第3トランジスタ(4a)〜(4c)のエミツタに接続され
た3相モータ(5)に出力されてモータ(5)が駆動さ
れる。
Generally, an inverter device which outputs a three-phase alternating current of a predetermined voltage and a predetermined frequency by turning on and off a plurality of switching elements is constructed as shown in FIG. 3, for example.
In the figure, (1a) to (1c) are first to third terminals connected to respective output terminals of R phase, S phase, and T phase of a three-phase AC power supply (not shown), and (2) is an input. Terminals are 1st-3rd terminals (1a)
A three-phase full-wave rectifier circuit that is connected to (1c) and that rectifies the output of the three-phase AC power supply, and (3) is a rectifier circuit (2) provided between the positive and negative output terminals of the rectifier circuit (2). The smoothing capacitors for smoothing the pulsating current from (4a) to (4f) are NPN type first to sixth transistors which are switching elements, and the collectors of the first to third transistors (4a) to (4c) are Connected to the positive output terminal of the rectifier circuit (2),
-Emitters of the sixth transistors (4d)-(4f) are connected to the negative output terminal of the rectifier circuit (2), and the emitters of the first-third transistors (4a)-(4c) and the fourth-fourth transistors, respectively. The 6 transistors (4d) to (4f) are connected to the respective collectors, and by turning on and off each of the transistors (4a) to (4f), the direct current from the rectifier circuit (2) and the capacitor (3) becomes a three-phase alternating current. 1 to 1 which are converted and output terminals
The motor (5) is driven by being output to the three-phase motor (5) connected to the emitters of the third transistors (4a) to (4c).

(6a)〜(6d)は各トランジスタ(4a)〜(4f)に逆方
向に並列接続された第1〜第6フライホイルダイオー
ド、(7)は両端が第2,第3端子(1b),(1c)に接続
された1次コイル(7a)と,第1〜第4コイル(8a)〜
(8d)および中間タツプ付きの第5コイル(8e)からな
る2次コイル(7b)とを備えたトランス、(9)は入力
端子が第5コイル(8e)に接続されブリツジ整流部,平
滑部,定電圧レギユレータ等からなる後述の制御回路用
電源回路、(10)は入力端子が第1〜第4コイル(8a)
〜(8d)に接続されブリツジ整流部,平滑部等からなる
後述の駆動回路用電源回路、(11)は電源回路(9)の
3個の出力端子に接続され各トランジスタ(4a)〜(4
f)のオン,オフ制御用の可変周波数,可変パルス幅の
パルス幅変調(以下パルス幅変調をPWMという)制御信
号を出力する制御回路、(12)は駆動回路であり、電源
回路(10)の8個の出力端子に接続され、各トランジス
タ(4a)〜(4f)のベースに前記PWM制御信号にもとづ
く駆動信号を出力して各トランジスタ(4a)〜(4f)を
オン,オフさせ、前記PWM制御信号の周波数,パルス幅
にもとづく所定電圧,所定周波数の3相交流を出力させ
るようになつており、整流回路(2),コンデンサ
(3),各トランジスタ(4a)〜(4f),各ダイオード
(6a)〜(6f),トランス(7),両電源回路(9),
(10),制御回路(11)および駆動回路(12)によりイ
ンバータ装置(13)が構成されている。
(6a) to (6d) are first to sixth flywheel diodes which are connected in parallel to the respective transistors (4a) to (4f) in the reverse direction, and (7) has the second and third terminals (1b) at both ends. Primary coil (7a) connected to (1c) and first to fourth coils (8a) to
(8d) and a transformer having a secondary coil (7b) consisting of a fifth coil (8e) with an intermediate tap, (9) has an input terminal connected to the fifth coil (8e), a bridge rectifying unit, a smoothing unit. , A power supply circuit for a control circuit, which will be described later, including a constant voltage regulator, and (10) whose input terminals are first to fourth coils (8a)
~ (8d) connected to the power supply circuit for the drive circuit, which will be described later, including a bridge rectification unit, a smoothing unit, etc. (11) is connected to the three output terminals of the power supply circuit (9) and each transistor (4a) to (4)
f) A control circuit that outputs a pulse width modulation (hereinafter referred to as PWM) control signal of variable frequency and variable pulse width for on / off control of (f), (12) is a drive circuit, and a power supply circuit (10) Connected to the eight output terminals of, and outputs a drive signal based on the PWM control signal to the bases of the transistors (4a) to (4f) to turn on and off the transistors (4a) to (4f), It is designed to output a three-phase alternating current of a predetermined voltage and a predetermined frequency based on the frequency of the PWM control signal, the pulse width, a rectifier circuit (2), a capacitor (3), transistors (4a) to (4f), each Diodes (6a) to (6f), Transformer (7), Dual power supply circuit (9),
The inverter device (13) is composed of the control circuit (11) and the drive circuit (12).

なお、モータ(5)が常に定格運転されるよう、制御回
路(11)から駆動回路(12)へのPWM制御信号の周波
数,パルス幅が可変制御されるようになつている。
It should be noted that the frequency and pulse width of the PWM control signal from the control circuit (11) to the drive circuit (12) are variably controlled so that the motor (5) is always in rated operation.

ところで、前記したインバータ装置(13)においてイン
バータ装置(13)の運転中に、前記3相交流電源のS相
あるいはT相が欠相した場合、トランス(7)の1次コ
イル(7a)への通電路が開くため、両電源回路(9),
(10)による制御回路(11),駆動回路(12)への通電
が停止し、制御回路(11)から駆動回路(12)へのPWM
制御信号の出力,駆動回路(12)から各トランジスタ
(4a)〜(4f)のベースへの駆動信号の出力が停止し、
インバータ装置(13)の運転が停止する。
By the way, in the above-mentioned inverter device (13), when the S phase or the T phase of the three-phase AC power supply is lost during operation of the inverter device (13), the primary coil (7a) of the transformer (7) Since the energization path opens, both power supply circuits (9),
The energization of the control circuit (11) and drive circuit (12) by (10) stops, and the PWM from the control circuit (11) to the drive circuit (12)
The output of the control signal, the output of the drive signal from the drive circuit (12) to the bases of the transistors (4a) to (4f) is stopped,
The operation of the inverter device (13) stops.

〔考案が解決しようとする問題点〕[Problems to be solved by the invention]

しかし、インバータ装置(13)の運転中に前記3相交流
電源のR相が欠相した場合、トランス(7)の1次コイ
ル(7a)への通電路は閉じたままであるため、両電源回
路(9),(10)による制御回路(11),駆動回路(1
2)への通電は継続して行なわれ、R相の欠相によりモ
ータ(5)が定格以下で運転されるべきところが、モー
タ(5)が定格で運転されるように制御回路(11)から
のPWM制御信号の周波数,パルス幅が可変されてインバ
ータ装置(13)の出力電圧,出力周波数が可変制御さ
れ、その結果欠相したR相分がS,Tの2相で補われるこ
とになつて整流回路(2)にピーク値がR相の欠相前の
約1.5倍という大きな電流が流れ、整流回路(2)を構
成する素子の破損,劣化を招くという問題がある。
However, when the R phase of the three-phase AC power supply is open during the operation of the inverter device (13), the power supply path to the primary coil (7a) of the transformer (7) remains closed, so that both power supply circuits are connected. Control circuit (11) and drive circuit (1) according to (9) and (10)
Power is continuously supplied to 2), and where the motor (5) should be operated below the rated value due to the open phase of the R phase, the control circuit (11) controls the motor (5) to operate at the rated value. The output voltage and output frequency of the inverter device (13) are variably controlled by changing the frequency and pulse width of the PWM control signal of the above, and as a result, the missing R phase is supplemented by the two phases S and T. As a result, a large current having a peak value of about 1.5 times that before the open phase of the R phase flows in the rectifier circuit (2), which causes a problem that the elements constituting the rectifier circuit (2) are damaged or deteriorated.

〔問題点を解決するための手段〕[Means for solving problems]

この考案は、前記の点に留意してなされたものであり、
3相交流電源の出力を整流,平滑して直流に変換する3
相全波整流回路および平滑コンデンサと、前記整流回路
および平滑コンデンサにより得られる直流を所定電圧,
所定周波数の3相交流に変換する6個のスイツチング素
子と、前記各スイツチング素子にそれぞれ逆方向に並列
接続されたフライホイルダイオードと、それぞれの1次
コイルの一端が前記3相交流電源の1相に接続され前記
それぞれの1次コイルの他端が前記3相交流電源の残り
の2相にそれぞれ接続された第1,第2トランスと、前記
第1トランスの2次コイルに接続され前記各スイツチン
グ素子のオン,オフ制御用の可変周波数,可変パルス幅
のパルス幅変調制御信号を出力する制御回路と、前記第
2トランスの2次コイルに接続され前記制御信号にもと
づく駆動信号を出力して前記各スイツチング素子をオ
ン,オフさせる駆動回路と、前記第1トランスからの前
記制御回路への入力電圧を検出し,前記入力電圧の所定
レベル以下への低下時に前記駆動回路に出力停止信号を
出力する停止回路とを備えたインバータ装置である。
This invention was made with the above points in mind,
Rectify and smooth the output of 3-phase AC power supply and convert to DC 3
A full-wave full-wave rectifying circuit and a smoothing capacitor, and a direct current obtained by the rectifying circuit and the smoothing capacitor to a predetermined voltage,
Six switching elements for converting into three-phase alternating current of a predetermined frequency, flywheel diodes connected in parallel to the respective switching elements in opposite directions, and one end of each primary coil is one phase of the three-phase alternating current power supply. And the other ends of the respective primary coils are respectively connected to the remaining two phases of the three-phase AC power source, and the respective switching coils connected to the secondary coils of the first transformer. A control circuit for outputting a pulse width modulation control signal having a variable frequency and a variable pulse width for ON / OFF control of an element, and a drive signal connected to the secondary coil of the second transformer to output a drive signal based on the control signal to output the control signal. A drive circuit for turning on and off each switching element and an input voltage from the first transformer to the control circuit are detected, and the input voltage is lowered to a predetermined level or less. An inverter apparatus that includes a stop circuit for outputting an output stop signal to the drive circuit.

〔作用〕[Action]

つぎに、この考案の作用について説明すると、両トラン
スの1次コイルの他端が接続されている3相交流電源の
2相のいずれかが欠相した場合には、両トランスの1次
コイルへの通電路が開き、両トランスを介した制御回路
および駆動回路への通電が停止され、インバータ装置の
運転が停止されるとともに、両トランスの1次コイルの
一端が接続されている3相交流電源の1相が欠相した場
合には、両トランスの1次コイルが直列接続されること
になり、両トランスの入力電圧および出力電圧が欠相前
の1/2に低下し、停止回路により第1トランスから制御
回路への入力電圧の所定レベル以下への低下が検出され
て駆動回路に出力停止信号が出力され、駆動回路から各
スイッチング素子への駆動信号の出力が停止されてイン
バータ装置の運転が停止される。
Next, the operation of the present invention will be described. If one of the two phases of the three-phase AC power source, to which the other ends of the primary coils of both transformers are connected, is open, the primary coils of both transformers are disconnected. Of the three-phase AC power supply in which the energization paths of the transformers are opened, the power supply to the control circuit and the drive circuit via both transformers is stopped, the operation of the inverter device is stopped, and one ends of the primary coils of both transformers are connected. If one of the phases is missing, the primary coils of both transformers will be connected in series, and the input voltage and output voltage of both transformers will drop to 1/2 before the open phase, and the (1) A drop in the input voltage from the transformer to the control circuit below a predetermined level is detected, an output stop signal is output to the drive circuit, and the drive signal output from the drive circuit to each switching element is stopped to operate the inverter device. But It is locked.

〔実施例〕〔Example〕

つぎに、この考案の1実施例を示す第1図および第2図
について説明する。
Next, FIGS. 1 and 2 showing an embodiment of the present invention will be described.

まず、第1図において、第3図と同一記号は同一のもの
もしくは相当するものを示し、第3図と異なる点は、ト
ランス(7)に代え、第1,第2トランス(14),(15)
の2個のトランスを設け、両トランス(14),(15)の
1次コイル(14a),(15a)の一端をともに第2端子
(1b)に接続するとともに、両1次コイル(14a),(1
5a)のそれぞれの他端を第1,第3端子(1a),(1c)に
それぞれ接続し、制御回路用電源回路(9)の入力端子
を第1トランス(14)の2次コイル(14b)の両端およ
びセンタータツプに接続し、駆動回路用電源回路(10)
の入力端子を第2トランス(15)の2次コイルを構成す
る4個のコイル(15b)〜(15e)の両端に接続するとと
もに、制御回路(11)に第2図に示す停止回路を設け、
整流回路(2),コンデンサ(3),各トランジスタ
(4a)〜(4f),各ダイオード(6a)〜(6f),両電源
回路(9),(10),制御回路(11),駆動回路(12)
および両トランス(14),(15)によりインバータ装置
(16)を構成した点である。
First, in FIG. 1, the same symbols as those in FIG. 3 indicate the same or corresponding ones, and the difference from FIG. 3 is that instead of the transformer (7), the first and second transformers (14), ( 15)
Two transformers are provided, and both ends of the primary coils (14a) and (15a) of both transformers (14) and (15) are connected to the second terminal (1b), and both primary coils (14a) , (1
5a) has the other ends connected to the first and third terminals (1a) and (1c), respectively, and the input terminal of the control circuit power supply circuit (9) is connected to the secondary coil (14b) of the first transformer (14). ) Both ends and center tap, drive circuit power supply circuit (10)
Is connected to both ends of four coils (15b) to (15e) forming the secondary coil of the second transformer (15), and the control circuit (11) is provided with the stop circuit shown in FIG. ,
Rectifier circuit (2), capacitor (3), transistors (4a) to (4f), diodes (6a) to (6f), power supply circuits (9), (10), control circuit (11), drive circuit (12)
In addition, the inverter device (16) is configured by both transformers (14) and (15).

つぎに、第2図について説明すると、(17)は電源回路
(9)の出力端子に接続された電圧入力端子、(18)は
入力端子が電圧入力端子(15)に接続されて定電圧を発
生する電源回路(9)に内蔵の定電圧レギユレータ、
(19)はレギユレータ(18)の出力端子と制御回路(1
1)の入力端子とを接続する接続端子、(20),(21)
は直列回路を構成し電圧入力端子(17)と接地点との間
に設けられた分圧用第1,第2抵抗、(22),(23)は直
列回路を構成しレギユレータ(18)の出力端子と接地点
との間に設けられた分圧用第3,第4抵抗、(24)はオー
プンコレクタ型の比較器であり、反転入力端子(−)お
よび非反転入力端子(+)がそれぞれ第1,第2抵抗(2
0),(21)の接続点および第3,第4抵抗(22),(2
3)の接続点に接続され、反転入力端子(−)側の電圧
レベルと非反転入力端子(+)側の所定レベルである基
準電圧レベルとを比較して前者のレベルが後者のレベル
よりも低いときにハイレベルの出力停止信号を出力端子
(25)から駆動回路(12)に出力するようになつてお
り、比較器(24),第1〜第4抵抗(20)〜(23)およ
びレギユレータ(18)の出力端子と比較器(24)の出力
端子との間に設けられた比較器(24)のプルアツプ用第
5抵抗(26)により停止回路(27)が構成されている。
Next, referring to FIG. 2, (17) is a voltage input terminal connected to the output terminal of the power supply circuit (9), and (18) is an input terminal connected to the voltage input terminal (15) to generate a constant voltage. A constant voltage regulator built into the power supply circuit (9) to generate,
(19) is the output terminal of the regulator (18) and the control circuit (1
Connection terminals for connecting to the input terminal of 1), (20), (21)
Is a series circuit and the first and second resistors for voltage division provided between the voltage input terminal (17) and the ground point, and (22) and (23) are series circuits and the output of the regulator (18). The voltage dividing third and fourth resistors (24) provided between the terminal and the ground point are open collector type comparators, and the inverting input terminal (−) and the non-inverting input terminal (+) are respectively 1, second resistance (2
0), (21) connection point and third and fourth resistors (22), (2
Connected to the connection point of 3), the voltage level on the inverting input terminal (-) side is compared with the reference voltage level which is the predetermined level on the non-inverting input terminal (+) side, and the former level is higher than the latter level. When it is low, a high level output stop signal is output from the output terminal (25) to the drive circuit (12), and the comparator (24), the first to fourth resistors (20) to (23) and The fifth circuit (24) for pull-up of the comparator (24) provided between the output terminal of the regulator (18) and the output terminal of the comparator (24) constitutes a stop circuit (27).

なお、比較器(24)の非反転入力端子(+)側の基準電
圧が正常時の比較器(24)の反転入力端子(−)側の電
圧の1/2よりやや大きくなるよう、第3,第4抵抗(2
2),(23)の抵抗値が設定されている。
It should be noted that the reference voltage on the non-inverting input terminal (+) side of the comparator (24) should be slightly larger than 1/2 of the voltage on the inverting input terminal (-) side of the comparator (24) at the normal time. , 4th resistance (2
The resistance values of 2) and (23) are set.

そして、インバータ装置(16)の運転中にR相あるいは
T相が欠相した場合、両トランス(14),(15)の1次
コイル(14a),(15a)への通電路が開き、両トランス
(14),(15)および両電源回路(9),(10)それぞ
れを介した制御回路(11)および駆動回路(12)への通
電が停止され、各トランジスタ(4a)〜(4f)がすべて
オフし、インバータ装置(16)の運転が停止される。
When the R phase or the T phase is lost during the operation of the inverter device (16), the energization paths to the primary coils (14a) and (15a) of both transformers (14) and (15) open, and The power supply to the control circuit (11) and the drive circuit (12) via the transformers (14) and (15) and the power supply circuits (9) and (10) is stopped, and the transistors (4a) to (4f) are stopped. Are all turned off, and the operation of the inverter device (16) is stopped.

つぎに、S相が欠相した場合、両トランス(14),(1
5)の1次コイル(14a),(15a)が直列接続されるこ
とになり、両トランス(14),(15)の入力電圧,出力
電圧がそれぞれ欠相前の1/2に低下し、比較器(24)に
より、第1トランス(14),電源回路(9)から制御回
路(11)への入力電圧を第1,第2抵抗(20),(21)に
より分圧して得られる比較器(24)の反転入力端子
(−)側の電圧レベルと,レギユレータ(18)から出力
される定電圧を第3,第4抵抗(22),(23)により分圧
して得られる非反転入力端子(+)側の基準電圧レベル
とが比較され、反転入力端子(−)側の電圧が欠相前の
1/2となつて非反転入力端子(+)側よりも低下したこ
とが検知され、比較器(24)から駆動回路(12)にハイ
レベルの出力停止信号が出力され、駆動回路(12)から
各トランジスタ(4a)〜(4f)への駆動信号の出力が停
止され、各トランジスタ(4a)〜(4f)がオフしてイン
バータ装置(16)の運転が停止される。
Next, when the S phase is missing, both transformers (14), (1
The primary coils (14a) and (15a) of 5) will be connected in series, and the input voltage and output voltage of both transformers (14) and (15) will drop to 1/2 before the open phase, respectively. Comparison obtained by dividing the input voltage from the first transformer (14) and the power supply circuit (9) to the control circuit (11) by the comparator (24) by the first and second resistors (20) and (21). Non-inverting input obtained by dividing the voltage level on the inverting input terminal (-) side of the device (24) and the constant voltage output from the regulator (18) by the third and fourth resistors (22) and (23). The reference voltage level on the terminal (+) side is compared, and the voltage on the inverting input terminal (-) side before phase loss
It becomes 1/2 and it is detected that it is lower than the non-inverting input terminal (+) side, and the comparator (24) outputs a high level output stop signal to the drive circuit (12), and the drive circuit (12) Output of the drive signal from each of the transistors (4a) to (4f) is stopped, each of the transistors (4a) to (4f) is turned off, and the operation of the inverter device (16) is stopped.

なお、トランジスタ(4a)〜(4f)に代え、サイリスタ
等の他のスイツチング素子を用いてもよいことは勿論で
ある。
Of course, other switching elements such as thyristors may be used instead of the transistors (4a) to (4f).

〔考案の効果〕[Effect of device]

したがつて、この考案のインバータ装置(16)による
と、3相交流電源に欠相が生じても、確実に各トランジ
スタ(4a)〜(4f)をオフしてインバータ装置(16)の
運転が停止され、整流回路(2)に大電流が流れること
を防止して整流回路(2)の各素子の破損,劣化を防止
することができ、その効果は顕著である。
Therefore, according to the inverter device (16) of the present invention, even if the three-phase AC power supply is out of phase, the transistors (4a) to (4f) are surely turned off to operate the inverter device (16). It is possible to prevent the large current from flowing through the rectifier circuit (2) when stopped, and prevent damage and deterioration of each element of the rectifier circuit (2), and the effect is remarkable.

【図面の簡単な説明】[Brief description of drawings]

第1図および第2図はこの考案のインバータ装置の1実
施例を示し、第1図は結線図、第2図は第1図の一部の
結線図、第3図は従来のインバータ装置の結線図であ
る。 (1a)〜(1c)……第1〜第3端子、(2)……3相全
波整流回路、(3)……平滑コンデンサ、(4a)〜(4
f)……トランジスタ、(6a)〜(6f)……フライホイ
ルダイオード、(11)……制御回路、(12)……駆動回
路、(14),(15)……トランス、(16)……インバー
タ装置、(27)……停止回路。
1 and 2 show one embodiment of the inverter device of the present invention. FIG. 1 is a connection diagram, FIG. 2 is a partial connection diagram of FIG. 1, and FIG. 3 is a conventional inverter device. It is a connection diagram. (1a) ~ (1c) ... 1st to 3rd terminals, (2) ... 3-phase full-wave rectifier circuit, (3) ... smoothing capacitor, (4a) to (4)
f) ... transistor, (6a) to (6f) ... flywheel diode, (11) ... control circuit, (12) ... drive circuit, (14), (15) ... transformer, (16) ... … Inverter device, (27) …… Stop circuit.

───────────────────────────────────────────────────── フロントページの続き (72)考案者 平塚 和博 大阪府守口市京阪本通2丁目18番地 三洋 電機株式会社内 (56)参考文献 特公 昭59−36514(JP,B2) ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kazuhiro Hiratsuka 2-18 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd. (56) References Japanese Patent Publication Sho 59-36514 (JP, B2)

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】3相交流電源の出力を整流,平滑して直流
に変換する3相全波整流回路および平滑コンデンサと、
前記整流回路および平滑コンデンサにより得られる直流
を所定電圧,所定周波数の3相交流に変換する6個のス
イツチング素子と、前記各スイツチング素子にそれぞれ
逆方向に並列接続されたフライホイルダイオードと、そ
れぞれの1次コイルの一端が前記3相交流電源の1相に
接続され前記それぞれの1次コイルの他端が前記3相交
流電源の残りの2相にそれぞれ接続された第1,第2トラ
ンスと、前記第1トランスの2次コイルに接続され前記
各スイツチング素子のオン,オフ制御用の可変周波数,
可変パルス幅のパルス幅変調制御信号を出力する制御回
路と、前記第2トランスの2次コイルに接続され前記制
御信号にもとづく駆動信号を出力して前記各スイツチン
グ素子をオン,オフさせる駆動回路と、前記第1トラン
スからの前記制御回路への入力電圧を検出し,前記入力
電圧の所定レベル以下への低下時に前記駆動回路に出力
停止信号を出力する停止回路とを備えたインバータ装
置。
1. A three-phase full-wave rectifying circuit and a smoothing capacitor for rectifying and smoothing the output of a three-phase AC power source to convert it into DC.
Six switching elements for converting the direct current obtained by the rectifying circuit and the smoothing capacitor into a three-phase alternating current having a predetermined voltage and a predetermined frequency, flywheel diodes connected in parallel in reverse directions to the switching elements, respectively. First and second transformers each having one end of the primary coil connected to one phase of the three-phase AC power supply and the other end of each primary coil connected to the remaining two phases of the three-phase AC power supply, respectively. A variable frequency connected to the secondary coil of the first transformer for ON / OFF control of each of the switching elements,
A control circuit for outputting a pulse width modulation control signal having a variable pulse width, and a drive circuit connected to the secondary coil of the second transformer for outputting a drive signal based on the control signal to turn on / off each of the switching elements. An inverter device comprising: a stop circuit that detects an input voltage from the first transformer to the control circuit and outputs an output stop signal to the drive circuit when the input voltage falls below a predetermined level.
JP493685U 1985-01-18 1985-01-18 Inverter device Expired - Lifetime JPH0644317Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP493685U JPH0644317Y2 (en) 1985-01-18 1985-01-18 Inverter device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP493685U JPH0644317Y2 (en) 1985-01-18 1985-01-18 Inverter device

Publications (2)

Publication Number Publication Date
JPS61123693U JPS61123693U (en) 1986-08-04
JPH0644317Y2 true JPH0644317Y2 (en) 1994-11-14

Family

ID=30480983

Family Applications (1)

Application Number Title Priority Date Filing Date
JP493685U Expired - Lifetime JPH0644317Y2 (en) 1985-01-18 1985-01-18 Inverter device

Country Status (1)

Country Link
JP (1) JPH0644317Y2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009194979A (en) * 2008-02-13 2009-08-27 Delta Electronics Inc Motor system reducing common mode noise

Also Published As

Publication number Publication date
JPS61123693U (en) 1986-08-04

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