To provide an angle computing device with which it is possible to suppress the loss of rotation angle of a motor even when the power supply voltage of electric power supplied to a first computation unit while a start switch is turned on is less than a voltage value with which the first computation unit is operable.SOLUTION: An angle computing device 30 comprises a microprocessor 31 and a rotation monitoring unit 32. The microprocessor 31 computes the rotation angle of a motor when an ignition switch 51 is on. The rotation monitoring unit 32 intermittently computes a count value C when the ignition switch 51 is off. The rotation monitoring unit 32 intermittently computes the count value C when the power supply voltage of electric power supplied to the microprocessor 31 while the ignition switch 51 is on is less than a voltage value with which the microprocessor 31 is operable. The microprocessor 31 computes the rotation angle using the count value C when the electric power supplied to the microprocessor 31 is restored to or above a voltage value with which the microprocessor 31 is operable.SELECTED DRAWING: Figure 2

    【課題】始動スイッチがオンされている期間に第1の演算部に供給される電力の電源電圧が第1の演算部が動作可能な電圧値未満の場合において、モータの回転角度の喪失を抑制できる角度演算装置を提供する。【解決手段】角度演算装置30は、マイコン31と、回転監視部32とを備えている。マイコン31は、イグニッションスイッチ51がオンされている場合、モータの回転角度を演算する。回転監視部32は、イグニッションスイッチ51がオフされている場合、カウント値Cを間欠的に演算する。回転監視部32は、イグニッションスイッチ51がオンされている期間にマイコン31に供給される電力の電源電圧がマイコン31が動作可能な電圧値未満の場合、カウント値Cを間欠的に演算する。マイコン31は、マイコン31に供給される電力の電源電圧がマイコン31が動作可能な電圧値以上に回復した場合、カウント値Cを用いて回転角度を演算する。【選択図】図2


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    Title :

    ANGLE COMPUTING DEVICE


    Additional title:

    角度演算装置


    Contributors:

    Publication date :

    2019-11-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01D MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE , Anzeigen oder Aufzeichnen in Verbindung mit Messen allgemein / B62D MOTOR VEHICLES , Motorfahrzeuge / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern



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