Brushless dc motor

Abstract

Abstract PURPOSE:To improve detecting performance of a frequency generator by constituting a frequency signal generating coil through connecting the first loop formed on the periphery of a semicircle and the second loop formed on the periphery of another semicircle in the shape of 8. CONSTITUTION:An annular magnet 5 of a rotor 4 has a main pole part (a), a frequency generator pole part (b) and a position detecting pole part (c), and a stator core 6 in a projecting structure is arranged opposite to the main pole part (a). Then, there are formed on a printed plate 8 a magnetoelectricity conversion element 11 in the range of a magnetic flux operation of the position detecting pole part (c) and a zigzag generating coil 10 of a frequency generator opposite to the pole part (b). The generating coil 10 is constituted to connect the first loop (generating coil 30a, return wire 31a) formed on the periphery of a semicircle and the second loop (generating coil 30b, return wire 31b) essentially in the shape of 8.

Inventors

• 👤 Makoto Goto
• 👤 Yoshiaki Igarashi

Bibliographic Details