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11. 发明专利

JPH06351182A PERMANENT MAGNET TYPE ROTOR 失效
公开(公告)号：JPH06351182A
公开(公告)日：1994-12-22
申请号：JP13590393
申请日：1993-06-07
申请人： MITSUBISHI ELECTRIC CORP
发明人： OKAWA YOSHIMITSU , KIKUCHI TOMOHIRO , OKADA YOSHINORI
IPC分类号： H02K1/27
摘要： PURPOSE:To make unnecesary the use of clamping metal and stop screws in view of realizing high efficiency of automatic assembling of rotor by forming a recessed area at the external circumference of a block type magnet piece, implanting resin material to such recessed area and fixing the necessary block type magnets around a rotating shaft. CONSTITUTION:Recessed areas 15 are provided at both ends in the axial direction of a block type magnet piece 12 rotating around a rotating shaft 11. A resin material is implanted to this recessed area 15 to fix the block type magnet piece 12. Moreover, the block type magnet piece 12 is fixed to the rotating shaft 11 with the resin material 12 in such a manner as wrapping from the external surface side. Thereby, since the block type magnet piece 12 is fixed by the resin material 21 in the double fixing method, it is never removed from the rotating shaft 11 with an centrifugal force generated by the rotating operation. Moreover, if further strength is required, a screw type ring is inserted into the recessed area 15. Thereby, assembling work of the rotor can be improved, enabling improvement in reliability at a low cost.

12. 发明专利

JPH05111211A MOTOR 失效
公开(公告)号：JPH05111211A
公开(公告)日：1993-04-30
申请号：JP27065491
申请日：1991-10-18
申请人： MITSUBISHI ELECTRIC CORP
发明人： KIKUCHI TOMOHIRO
IPC分类号： H02K5/18 , H02K9/22
摘要： PURPOSE:To obtain a motor, whose fin structure is not dependent on the providing direction of the motor and the flowing direction of a cooling fluid and moreover can radiate efficiently the heat generated by the motor. CONSTITUTION:On the outer periphery of a main body 1 of a motor, mounted is a spiral fin 11 which slews around the center line of the rotational shaft of the motor. When cooling the motor by making a fluid flow through the outer periphery of the motor, even though the fluid is made to flow not only in parallel with the center line of a rotational shaft 4 of the main body 1 of the motor but also in the direction vertical to the center line, the fluid can flow along the spiral fin 11. Therefore, the main body 1 of the motor can be prevented from overheating. Also, there is no necessity for providing the motors whose fin structures are different from each other according to the providing directions of the motors and the flowing directions of cooling fluids. Therefore, the standardization of parts is made executable, and process managements are made simple. As a result, the effect of lowering the cost of the motor is obtained.

13. 发明专利

JPH04242A MOTOR INTEGRATED WITH AMPLIFIER 失效
公开(公告)号：JPH04242A
公开(公告)日：1992-01-06
申请号：JP21577690
申请日：1990-08-17
申请人： MITSUBISHI ELECTRIC CORP
发明人： KIKUCHI TOMOHIRO , NAKAMOTO MICHIO , OGAKE TADAO , OKAWA YOSHIMITSU
IPC分类号： H02K9/19 , H02K11/00
摘要： PURPOSE:To suppress temperature rise of an amplifier by arranging a refrigerant flow path between a motor and the amplifier, in a unit where the amplifier for controlling the motor is mounted on the motor. CONSTITUTION:An amplifier 2 comprises a converter, a smoothing capacitor, an inverter, and the like. A tank 21 is fixed between the motor 1 and the amplifier 2. Pipes 22, 23 are coupled, respectively, to the tank 21 at the opposite ends thereof and water is enclosed, as refrigerant, in the tank 21 and the pipes 22, 23. In such arrangement, water 24 is fed through the pipe 22 into the tank 21 thence through the pipe 23 in the direction of an arrow B. The water 24 has high heat capacity and absorbs heat from the motor 1 thus suppressing transmission of heat to the amplifier 2.

14. 发明专利

JP2006320088A PERMANENT-MAGNET ROTARY ELECTRIC MACHINE 审中-公开
公开(公告)号：JP2006320088A
公开(公告)日：2006-11-24
申请号：JP2005138969
申请日：2005-05-11
申请人： MITSUBISHI ELECTRIC CORP
发明人： YAMAGUCHI SHINICHI , YONETANI HARUYUKI , KIKUCHI TOMOHIRO , TAMURA TAKASHI
IPC分类号： H02K1/18 , H02K1/22 , H02K1/27 , H02K21/14
摘要： PROBLEM TO BE SOLVED: To obtain a permanent-magnet rotary electric machine wherein a theoretical angle is taken as its skew angle and cogging torque can be reduced while suppressing reduction in output as much as possible. SOLUTION: The permanent-magnet rotary electric machine includes: a rotor 3 in which a permanent magnet 32 having a plurality of magnetic poles in the circumferential direction is disposed and skews are formed in boundary lines or boundary areas between the magnetic poles of the permanent magnet; and a stator 2 that is disposed inside the rotor and includes a substantially cylindrical stator core 21 on which a plurality of salient poles protruded inward are formed. Letting the axial length of the stator core be L, the plate thickness of an electromagnetic steel plate 4 used for the stator core t, and the number of the electromagnetic steel plates used n, the space factor P of the core, which can be calculated by P=nt/L×100 [%], is controlled within a range of 97 to 99.4%. COPYRIGHT: (C)2007,JPO&INPIT

15. 发明专利

JP2000116167A SERVO-CONTROL APPARATUS 失效
公开(公告)号：JP2000116167A
公开(公告)日：2000-04-21
申请号：JP28011498
申请日：1998-10-01
申请人： MITSUBISHI ELECTRIC CORP
发明人： KIKUCHI TOMOHIRO
IPC分类号： H02H7/085 , H02P7/00 , H02P29/00 , H02P29/02 , H02P29/62 , H02P29/64 , H02P29/68 , H02P5/00
摘要： PROBLEM TO BE SOLVED: To obtain a servo-control device which prevents motor winding or an inverter part from being damaged thermally, even while a servomotor is stopped in a servo lock state or is in use in which the servomotor requires high torque. SOLUTION: This servo control device is provided with a detection means (a positioning detection circuit) 121, which detects that a servomotor is stopped in a servo lock state at a specific position within one rotation. When the number of times of stops becomes a stoppage number-of-times prescribed value, when its stop time becomes a stop-time prescribed value, or when the current value of the servomotor at its stop becomes a current prescribed value, a warning is output.

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