ACTUATOR AND MAGNETIC CIRCUIT

• Main Authors: TSUCHIYA EIJI, MIZUNO SACHIHIRO
• Format: Patent
• Language: English; Japanese
• Published: 18.10.2018
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; INDUCTANCES; MAGNETS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS

PROBLEM TO BE SOLVED: To reduce electric power when two magnetic path members are absorbed in an actuator having two magnetic path members which are absorbable and releasable.SOLUTION: An actuator 10 includes: a first magnetic path member 12; a second magnetic path member 14 which is absorbable and releasable with respect to the first magnetic path member 12; a variable permanent magnet 18; a coil 16; a release spring 26; and a bypass magnetic path member 24. The bypass magnetic path member 24 forms the magnetic path in parallel to the variable permanent magnet 18 when the second magnetic path member is in a released state. If a current is made to flow through the coil 16 when the second magnetic path member 14 is in the released state, a flux passes through a path including the bypass magnetic path member 24 having lower magnetic resistance than the path passing through the variable permanent magnet 18. Since the flux passes through the path having the lower magnetic resistance, electric power for generating the required magnetic force can be reduced.SELECTED DRAWING: Figure 1 【課題】吸着および解放可能な２つの磁路部材を有するアクチュエータにおいて、２つの磁路部材を吸着させるときの電力を低減する。【解決手段】アクチュエータ１０は、第１磁路部材１２と、第１磁路部材１２に対して吸着および解放可能な第２磁路部材１４と、可変永久磁石１８と、コイル１６と、解放ばね２６と、迂回磁路部材２４を有する。迂回磁路部材２４は、第２磁路部材が解放状態のときに可変永久磁石１８と並列の磁路を形成する。第２磁路部材１４が解放状態のときにコイル１６に電流を流すと、磁束は、可変永久磁石１８を通る経路より磁気抵抗の低い迂回磁路部材２４を含む経路を通る。磁気抵抗の低い経路を磁束が通るので、必要な磁力を発生させるための電力を低減することができる。【選択図】図１