JP2009118599A5

JP2009118599A5 -

Info

Publication number: JP2009118599A5
Application number: JP2007287313A
Authority: JP
Filing date: 2007-11-05
Publication date: 2012-02-16
Anticipated expiration: 2027-11-05

Description

上記問題を解決するため、本発明は、次のように構成したものである。
請求項１に記載の発明は、電動機を駆動制御するための電圧指令とキャリア周波数を演算する指令値演算回路と、前記指令値演算回路からの前記電圧指令と前記キャリア周波数のデータを保持する設定値保持回路と、前記設定値保持回路の前記データを取り込むロードタイミング回路と、前記ロードタイミング回路で取り込んだ前記データからＰＷＭ信号を生成するＰＷＭ生成回路とを備えたＰＷＭインバータ装置において、
前記ロードタイミング回路は、前記電圧指令と前記キャリア周波数の設定値が変更されると、変更前のキャリアの山もしくは谷に同期して、前記電圧指令と前記キャリア周波数を同時に変更するものである。
請求項２に記載の発明によれば、請求項１に記載のＰＷＭインバータ装置において、前記ロードタイミング回路は、前記設定値保持回路の前記電圧指令と前記キャリア周波数の前記データが変更されると、ロード信号に基づいて旧前記データを更新する更新レジスタと、所定のキャリアの山と谷の周期によりキャリア同期信号を生成する山谷カウンタと、を備えているものである。
請求項３に記載の発明によれば、請求項２に記載のＰＷＭインバータ装置において、前記ロード信号は、前記設定値保持回路のライト信号と前記キャリア同期信号により生成され、前記設定値保持回路の設定完了後に、前記ロード信号に基づいて、前記電圧指令と前記キャリア周波数を更新するものである

In order to solve the above problems, the present invention is configured as follows.
The invention according to claim 1 is a setting for holding a voltage command for driving and controlling a motor and a command value calculation circuit for calculating a carrier frequency, and holding the voltage command and the carrier frequency data from the command value calculation circuit. In a PWM inverter device comprising: a value holding circuit; a load timing circuit that takes in the data of the set value holding circuit; and a PWM generation circuit that generates a PWM signal from the data taken in by the load timing circuit.
When the voltage command and the set value of the carrier frequency are changed, the load timing circuit simultaneously changes the voltage command and the carrier frequency in synchronization with the peak or valley of the carrier before the change.
According to the invention described in claim 2, in the PWM inverter apparatus according to claim 1, wherein the load timing circuit, when the data of the voltage command and the carrier frequency of the set value holding circuit is changed, in which includes an update register for updating old the data based on the load signal, the peaks and valleys counter for generating a carrier sync signal by the period of the peaks and valleys of a given carrier, the.
According to a third aspect of the present invention, in the PWM inverter device according to the second aspect, the load signal is generated by a write signal of the set value holding circuit and the carrier synchronization signal, and the set value holding circuit After the setting is completed , the voltage command and the carrier frequency are updated based on the load signal.

Claims

A command value calculation circuit for calculating a voltage command and a carrier frequency for driving and controlling the electric motor, a setting value holding circuit for holding data of the voltage command and the carrier frequency from the command value calculation circuit, and the setting value holding In a PWM inverter device comprising a load timing circuit that captures the data of the circuit, and a PWM generation circuit that generates a PWM signal from the data captured by the load timing circuit,
The load timing circuit is configured to simultaneously change the voltage command and the carrier frequency in synchronization with a peak or valley of the carrier before the change when the set value of the voltage command and the carrier frequency is changed. PWM inverter device.

The load timing circuit includes:
When the data of the voltage command and the carrier frequency of the set value holding circuit is changed, the update register for updating old the data based on the load signal,
A valley / valley counter that generates a carrier synchronization signal according to a period of peaks and valleys of a predetermined carrier ;
The PWM inverter device according to claim 1, comprising:

The load signal is generated by the write signal of the set value holding circuit and the carrier synchronization signal,
3. The PWM inverter device according to claim 2, wherein after the setting of the set value holding circuit is completed , the voltage command and the carrier frequency are updated based on the load signal .