Controller

制御装置

Abstract

PROBLEM TO BE SOLVED: To provide a simple voltage detection means having high reliability, by which an excess or deficiency of a drive voltage to drive a switching element is detected. SOLUTION: In a controller 1, a potential Vj of a connection point J between a first resistance 151 and a second resistance 152 of a voltage detection circuit 15 is input into a microcomputer 4. In a memory 41, the potential Vj is sampled at an interval 1 msec, and the sampled values are sequentially stored. A calculation section 42 calculates a moving average value S of newer four sampled values out of stored sampled values. A determination section 43 determines whether a threshold Ha is equal to or less than the moving average value S, and the moving average value S is equal to or less than a threshold Hb. When the threshold Ha is equal to or less than the moving average value S and the moving average value S is equal to or less than the threshold Hb, the microcomputer 4 continuously outputs signals to a drive IC5; and when the moving average value S is equal to or less than the threshold Ha or the threshold Hb is equal to or less than the moving average value S, the microcomputer 4 stops the signal output to the drive IC5. COPYRIGHT: (C)2011,JPO&INPIT
【課題】スイッチング素子を駆動する駆動電圧の過不足を検出する、簡素で信頼性の高い電圧検出手段を提供する。 【解決手段】制御装置1では、電圧検出回路15の第1抵抗151と第2抵抗152の接続点Jの電位Vjがマイコン4に入力される。メモリ41は、電位Vjを1msecでサンプリングし、そのサンプリング値を順に記憶する。演算部42は、記憶されたサンプリング値のうち新しい方から4個分のサンプリング値の移動平均値Sを算出する。判定部43は、閾値Ha≦移動平均値S≦閾値Hbであるか否かを判定する。Ha≦移動平均値S≦閾値Hbのとき、マイコン4は駆動IC5への信号出力を継続し、移動平均値S≦閾値Ha、或は閾値Hb≦移動平均値Sのとき、マイコン4は、駆動IC5への信号出力を停止する。 【選択図】図1

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    JP-2012151974-AAugust 09, 2012Daikin Ind Ltd, ダイキン工業株式会社Power conversion device