HIGH SPEED DC MOTOR

专利名称：HIGH SPEED DC MOTOR

发明人：BAHN, Itsuki 50-18, Higashioizumi 3-chome申请号：EP92903738.0申请日：19920123公开号：EP0522179A1公开日：19930113

专利附图：

摘要：A three-phase star-connected brushless DC motor capable of rotating at a highspeed efficiently and keeping armature currents at a present value. Three transistorbridge circuits (10a-10d, 11a-11d, 11e-11h) for the motor are divided into six electriccircuits. To the output terminals (2a, 2b) of a DC power supply for supplying electric

power to the six electric circuits, six circuits each comprising a reverse blocking diode(17a-17f) and a capacitor (16a-16f) parallely connected to the diode are connected. Atthe ends of positional sensing signals, by magnetic energies stored in armature coils (4a-4c), the capacitors (16a-16f) are charged, and the capacitor voltages come high to causethe armature currents to rise rapidly. Further by this high capacitor voltage, the

energization of each armature coil is made rapidly. By such a means, the motor can rotateat a high speed. Also, two chopper circuits (14a, 14h) for keeping the armature currentsat a current value regulated by a reference voltage are provided.

申请人：KABUSHIKIGAISHA SEKOGIKEN

地址：Room 604, Annex 31-21, Jingumae 6-chome Shibuya-ku, Tokyo 150 JP

国籍：JP

代理机构：Billington, Lawrence Emlyn

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