JPH0534728U - Inverter - Google Patents

Inverter

Info

Publication number
JPH0534728U
JPH0534728U JP9154791U JP9154791U JPH0534728U JP H0534728 U JPH0534728 U JP H0534728U JP 9154791 U JP9154791 U JP 9154791U JP 9154791 U JP9154791 U JP 9154791U JP H0534728 U JPH0534728 U JP H0534728U
Authority
JP
Japan
Prior art keywords
waveform
cpu
generation circuit
frequency pwm
high frequency
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.)
Pending
Application number
JP9154791U
Other languages
Japanese (ja)
Inventor
勝司 浅川
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.)
Miki Pulley Co Ltd
Original Assignee
Miki Pulley Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Miki Pulley Co Ltd filed Critical Miki Pulley Co Ltd
Priority to JP9154791U priority Critical patent/JPH0534728U/en
Publication of JPH0534728U publication Critical patent/JPH0534728U/en
Pending legal-status Critical Current

Links

Abstract

(57)【要約】 【目的】 高速演算用CPUを必要とせず、安価なCP
Uを利用して高周波PWM波形を生成し得るようにす
る。 【構成】 CPU2は、メインサイン波形を連続周期で
生成して、ハードで構成した高周波PWM波形生成回路
3に供給する。高周波PWM波形生成回路3は、メイン
サイン波形Aと、キャリア周波数三角波Bを合成し、高
周波PWM波形Dを生成する。
(57) [Abstract] [Purpose] An inexpensive CP that does not require a high-speed CPU
Allow U to generate high frequency PWM waveforms. [Configuration] The CPU 2 generates a main sine waveform in a continuous cycle and supplies it to a high-frequency PWM waveform generation circuit 3 configured by hardware. The high frequency PWM waveform generation circuit 3 synthesizes the main sine waveform A and the carrier frequency triangular wave B to generate a high frequency PWM waveform D.

Description

【考案の詳細な説明】[Detailed description of the device]

【0001】[0001]

【産業上の利用分野】[Industrial applications]

本考案はインバータ特にその高周波PWM波形生成回路に関する。 The present invention relates to an inverter, and particularly to a high frequency PWM waveform generation circuit for the inverter.

【0002】[0002]

【従来の技術】[Prior Art]

従来は、高周波PWM波形を、図5に示す如く、高速演算及び高速タイマーを 持つCPU1で演算し、ROMテーブルをアクセスして、生成していた。 Conventionally, as shown in FIG. 5, a high frequency PWM waveform is calculated by the CPU 1 having a high speed operation and a high speed timer, and the ROM table is accessed to generate it.

【0003】[0003]

【考案が解決しようとする問題点】[Problems to be solved by the device]

高周波PWM生成回路部は、汎用CPUを用いた場合、演算スピードが遅いた め、リアルタイムで動作ができない。また、波形演算に時間がかかるため、高速 CPUを利用しても運転パラメータの変更が運転中はできないという問題点が存 した。 そのため、高周波PWM生成回路部は汎用CPUではなく、高速で、なを且つ 、処理能力の大きなCPUが必要となる。 本考案は上記問題点を解決することを目的とするものである。 When a general-purpose CPU is used, the high-frequency PWM generation circuit section cannot operate in real time because the calculation speed is slow. In addition, since it takes time to calculate the waveform, there is a problem that the operating parameters cannot be changed during operation even if a high-speed CPU is used. Therefore, the high-frequency PWM generation circuit unit is not a general-purpose CPU, but a high-speed, high-speed, high-performance CPU is required. The present invention aims to solve the above problems.

【0004】[0004]

【問題点を解決する手段】[Means for solving problems]

上記目的を達成するため、本考案は、ロジック回路より成る波形生成回路にお いて、CPUから連続周期で生成される3相サイン波出力と、キャリア周波数三 角波とを合成し、この合成によって高周波3相PWM波形を生成するようにした ものである。 In order to achieve the above object, the present invention, in a waveform generation circuit composed of a logic circuit, synthesizes a three-phase sine wave output generated in a continuous cycle from a CPU and a carrier frequency triangle wave, and by this synthesis, A high-frequency three-phase PWM waveform is generated.

【0005】[0005]

【作用】[Action]

CPUからメイン3相サイン波形を出力し、高周波PWM波形生成回路により 、PWM波形に変換し、ドライブする。 The main three-phase sine waveform is output from the CPU, converted into a PWM waveform by the high frequency PWM waveform generation circuit, and driven.

【0006】[0006]

【実施例】 以下に本考案の構成を添付図面に示す実施例を参照して詳細に説明する。 図2は、本考案の概略ブロック図であり周波数指令がD/A変換回路20に入 力され、アナログデータに変換されて、CPU2に供給される。CPU2は、図 3のタイマー回路波形と3相サイン波形Aを波形生成回路3に出力する。Embodiments of the present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. FIG. 2 is a schematic block diagram of the present invention. The frequency command is input to the D / A conversion circuit 20, converted into analog data, and supplied to the CPU 2. The CPU 2 outputs the timer circuit waveform and the three-phase sine waveform A shown in FIG. 3 to the waveform generation circuit 3.

【0007】 波形生成回路3は、図1に示す如く、キャリア周波数三角波発振回路4と、ラ ッチ回路5,6,7、D/A変換回路8,9,10、オペアンプ11,12,1 3,14及びコンパレータ15,16,17とから構成されている。As shown in FIG. 1, the waveform generation circuit 3 includes a carrier frequency triangular wave oscillation circuit 4, latch circuits 5, 6, and 7, D / A conversion circuits 8, 9, and 10, operational amplifiers 11, 12, and 1. 3, 14 and comparators 15, 16 and 17.

【0008】 CPU2から連続周期で出力される3相サイン波形Aのデータは、波形生成回 路3の入力部に供給される。サイン波形Aと、三角波Bは、合成されて、この合 成波形Cから、PWM波形Dが生成され、図4に示すドライブアイソレーション 回路18を経てインバータのパワーモジュール19に供給される。The data of the three-phase sine waveform A output from the CPU 2 in a continuous cycle is supplied to the input unit of the waveform generation circuit 3. The sine waveform A and the triangular wave B are combined, a PWM waveform D is generated from the combined waveform C, and the PWM waveform D is supplied to the power module 19 of the inverter via the drive isolation circuit 18 shown in FIG.

【0009】[0009]

【効果】【effect】

本考案は上述の如く、インバータの高周波PWM波形をソフトとハードで生成 することにより、CPUにおいて、高周波PWM波形生成時の演算要素がなくな り、CPUは、メイン波形を連続周期で生成するのみで、CPUの負担がなくな り、汎用性のCPUで十分性能を引き出すことができ、他の運転パラメータを十 分に入力することができる等の効果が存する。 According to the present invention, as described above, by generating the high frequency PWM waveform of the inverter by software and hardware, the CPU eliminates the operation elements when generating the high frequency PWM waveform, and the CPU only generates the main waveform in a continuous cycle. Therefore, there is an effect that the load on the CPU is eliminated, a general-purpose CPU can bring out sufficient performance, and other operating parameters can be sufficiently input.

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

【図1】ブロック回路図である。FIG. 1 is a block circuit diagram.

【図2】ブロック説明図である。FIG. 2 is a block diagram.

【図3】波形説明図である。FIG. 3 is a waveform explanatory diagram.

【図4】全体ブロック図である。FIG. 4 is an overall block diagram.

【図5】従来技術の説明ブロック図である。FIG. 5 is an explanatory block diagram of a conventional technique.

【符号の説明】[Explanation of symbols]

8 D/A変換回路 9 D/A変換回路 10 D/A変換回路 11 オペアンプ 12 オペアンプ 13 オペアンプ 14 オペアンプ 15 コンパレ−タ 16 コンパレ−タ 17 コンパレ−タ 20 D/A変換回路 8 D / A conversion circuit 9 D / A conversion circuit 10 D / A conversion circuit 11 Operational amplifier 12 Operational amplifier 13 Operational amplifier 14 Operational amplifier 15 Comparator 16 Comparator 17 Comparator 20 D / A conversion circuit

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】 ロジック回路より成る波形生成回路にお
いて、CPUから連続周期で生成される3相サイン波出
力と、キャリア周波数三角波とを合成し、この合成によ
って高周波3相PWM波形を生成するようにしたことを
特徴とするインバータ。
1. A waveform generation circuit comprising a logic circuit, wherein a three-phase sine wave output generated in a continuous cycle from a CPU and a carrier frequency triangular wave are combined, and a high frequency three-phase PWM waveform is generated by this combination. The inverter that is characterized.
JP9154791U 1991-10-11 1991-10-11 Inverter Pending JPH0534728U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9154791U JPH0534728U (en) 1991-10-11 1991-10-11 Inverter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9154791U JPH0534728U (en) 1991-10-11 1991-10-11 Inverter

Publications (1)

Publication Number Publication Date
JPH0534728U true JPH0534728U (en) 1993-05-07

Family

ID=14029517

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9154791U Pending JPH0534728U (en) 1991-10-11 1991-10-11 Inverter

Country Status (1)

Country Link
JP (1) JPH0534728U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006238630A (en) * 2005-02-25 2006-09-07 Mitsubishi Electric Corp Power conversion device
JP2007181253A (en) * 2005-12-27 2007-07-12 Mitsubishi Electric Corp Power converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006238630A (en) * 2005-02-25 2006-09-07 Mitsubishi Electric Corp Power conversion device
JP2007181253A (en) * 2005-12-27 2007-07-12 Mitsubishi Electric Corp Power converter

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