| 摘要 |
468,414. Electric motors. BRITISH SANGAMO CO., Ltd., and SHOTTER, G. F. Jan. 2, 1936, No. 178. [Class 35] [Also in Group XXXVI] In an electrically driven movement, particularly for a measuring instrument or in a motor the rotor windings are fed through a non-contact making current transferring device independent of the exciting field and through rectifiers of the static type with current dependent on the position of the rotor relatively to the stator. In the form shown, the electromagnet 12 is energized from the supply and induces current in turn in the windings 8, 9, 10, 11 carried by the motor or instrument spindle. Each coil is connected through a rectifier 3 ... 6 to a winding 2 on the armature which is thereby rotated in the field of the permanent magnet N, S. The device may then be operated as an ampere hour meter. The field magnet may be energized with alternating or continuous current instead of being permanently magnetized. For polyphase systems, additional rectifiers and inducing windings are employed. If the armature is energized from a constant voltage supply, the apparatus may be used to measure the current in the exciting circuit or it may be used for power recording by exciting the field magnet in proportion to the current and energizing the armature with the voltage of the circuit. |
