Sanyo Electric Co., Ltd.

Tomita Electric Co., Ltd.

Eiichi Murata

Kazuhiko Arai

Keijiro Igarashi

Masaaki Takezawa

Toshihito Yanashima

Noboru Onodera

Shigemi Koiso

Yoshitomo Nakayama

Kazuhiro Enomoto

Masanori Yamashita

Kiichi Oyama

Masaaki Yamanoi

Eiji Kuramoto

A synchronous induction motor features improved assemblability of a rotor, significantly reduced production cost, and improved operation performance of the motor. A plurality of die-cast secondary conductors is provided around a rotor yoke constituting the rotor of the synchronous induction motor. End rings are die-cast integrally with the secondary conductors on the peripheral portions of both end surfaces of the rotor yoke. Permanent magnets are inserted into slots formed such that they penetrate the rotor yoke. The openings of both ends of the slots are closed by a pair of end surface members formed of a non-magnetic constituent. One of the end surface members is secured to the rotor yoke by one of the end rings when the secondary conductors and the end rings are formed. The other end surface member is secured to the rotor yoke by a fixture.

Synchronous induction motor and manufacturing method and drive unit for the same, and hermetic electric compressor

A synchronous induction motor realizing a great reluctance torque by concentrating a magnetomotive force generated by a rotor provided with a permanent magnet having a two-pole structure, and having a high efficiency. The synchronous induction motor has a stator provided with a stator winding, a rotor rotating within the stator, a cage-type secondary electric conductor provided in a peripheral portion of a rotor yoke portion constituting the rotor, and a permanent magnet inserted into the rotor yoke portion and having a two-pole structure, and the magnetomotive force generated by one pole of the rotor is set to a value equal to or less than 10% of a peak value in a predetermined range near an electrical angle of 0 degrees or 180 degrees.

Synchronous induction motor

An electric compressor has improved ability to connect an end of a stator winding with fastening terminals so that electrical connection can be established between the stator winding and the sealed terminal. The electric compressor includes lug terminal strips connected electrically to ends of lead wires from the stator winding each covered with an insulating tube, and fastening terminals connected through the lug terminal strips to the sealed terminal for supplying power to the electric elements. The lug terminal strips are manufactured by press molding and each includes a pair of conductor pressing portions, a cylindrical portion formed on one side of the conductor pressing portions, and a pair of insulating film fixing portions formed on the other side of the conductor pressing portions so that the fastening terminal can be connected to the cylindrical portion by pressing the conductor pressing portions onto the stator winding and fixing the insulating film fixing portions to the insulating tube by pressure welding.

Electrical terminal connection for a compressor

Growing community of inventors

Isesaki, Japan

Eiichi Murata