Controlled magnetic bearing device
I claim: 1. A controlled magnetic bearing apparatus for radially supporting a rotor, comprising a displacement sensor for detecting a radial displacement of said rotor, a first control unit for calcul... Read More
Inventors: Shinozaki, Hiroyuki;, Assignee: Ebara Corporation (Tokyo, JP) |
Method and apparatus for controlling the rotational speed and phase of synchronous motors
Briefly stated and according to an aspect of this invention, this aim is achieved by sensing the motion of the poles with respect to the stator by means of an inductive sensor coil. The sensor signals... Read More
Inventors: Hoffmann, Harald; Raducanu, Dan-Corneliz;, Assignee: Braun Aktiengesellschaft (Kronberg, DE) |
Washing machine with direct drive system
Among the various objects and features of the present invention may be noted the provision of an improved, yet simplified drive for washing machines. Another object of the present invention is the pro... Read More
Inventors: Obradovic, Ilija J.;, Assignee: Emerson Electric Co. (St. Louis, MO) |
Induction motor
It is an object of the present invention to provide an inexpensive, rigid induction motor which eliminates a torque ripple therefrom and can serve as a highly precise, variable speed servo motor drive... Read More
Inventors: Okamoto, Kiyokazu; Endo, Tetsuo; Miyamoto, Yukio; Suzuki, Yoshiharu;, Assignee: NEC Corporation (JP) |
Method for retaining a magnet within a motor assembly
OF THE PREFERRED EMBODIMENT Referring to FIG. 1, a six pole motor 11 is assembled from drive end head 13, an armature or armature assembly 15, a frame 17, six permanent magnets 19, six magnet shields... Read More
Inventors: Hammer, Joe K.; Fitzsimmons, Alan H.; Greutmann, Hans;, Assignee: Prestolite Electric Incorporated (Toledo, OH) |
Servo control system
It is, therefore, an object of the invention to provide a servo control system capable of separating a control system effectively and suitably at a suitable place in the servo control system. The serv... Read More
Inventors: Uehara, Shinichiro; Ichikawa, Wataru; Takei, Manabu;, Assignee: Kabushiki Kaisha SG (Tokyo, JP) |
Electronic washer control including automatic balance, spin and brake operations
In accordance with certain embodiments of this invention, the size of the imbalance within the wash load is minimized, the extent and nature of any remaining imbalance is determined, the terminal spin... Read More
Inventors: Payne, Thomas R.; Rice, Steven A.; McKnight, Jr., Richard E.; Wead, William W.;, Assignee: General Electric Company (Louisville, KY) |
Sensorless rotor position measurement in electric machines
According to the invention a position sensing system for an electric machine with one or more phases, comprises at least one current transducer arranged for measurement of the current in a monitored p... Read More
Inventors: Ray, William F.;, Assignee: Switched Reluctance Drives Limited (Leeds, GB2) |
Stator of dynamo-electric machine
The object of the present invention is therefore to provide a stator of a dynamo-electric machine whereby a winding can be wound in alignment outside the stator with high density, the end part of the ... Read More
Inventors: Takeuchi, Manabu; Hirano, Mikio; Kinashi, Yoshikazu; Wada, Yukitoshi;, Assignee: Matsushita Electric Industrial Co., Ltd. (Osaka-fu, JP) |
Insulating member for a core of a motor
We claim: 1. A single insulating member for a core of a motor, the single insulating member electrically insulating a stator core of the motor, formed with a plurality of sets of slots and slot openin... Read More
Inventors: Uchida, Hiroyuki; Yamamoto, Tomonaga; Tamaki, Takeshi;, Assignee: Fanuc Ltd. (Yamanashi, JP) |
Stator core having a plurality of connected circumferentially segmented cores and method and apparatus for assembling same
In order to attain the above-described first object, the present invention is a stator core having a plurality of circumferentially segmented cores, each of the segmented cores having a projection and... Read More
Inventors: Suzuki, Tetsuo;, Assignee: Honda Giken Kogyo Kabushiki Kaisha (Tokyo, JP) |
Simplified control for running a switched reluctance motor
OF THE PREFERRED EMBODIMENT As illustrated in FIGS. 1 and 8, this invention is a control circuit 10 for controlling a switch reluctance motor 14 including at least one phase 18, the control 10 compri... Read More
Inventors: Mehlhorn, William L.;, Assignee: A. O. Smith Corporation (Milwaukee, WI) |
Method and apparatus for implementing sensorless control of a switched reluctance machine
In accordance with one embodiment of the present invention a "sensorless" method of controlling a switched reluctance machine having a plurality of phase windings is provided that eliminates the need ... Read More
Inventors: Tang, Yifan;, Assignee: Emerson Electric Co. (St. Louis, MO) |
Seal arrangement between inner and outer tubs of a horizontal axis washing machine
The present invention is particularly concerned with preventing foreign objects, which could clog or otherwise disrupt the normal operation of a horizontal washing machine pump, from flowing through a... Read More
Inventors: Bestell, Gary D.; Johnson, Troy A.; Smothers, Louis R.; Van Drimmelen, Theodore R.; Vande Haar, Evan R.; White, William R.;, Assignee: Maytag Corporation (Newton, IA) |
Method and apparatus for control of a switched reluctance motor
In the preferred form, the present invention comprises a method and apparatus for estimating the rotor position of a SRM. The estimated rotor position can then be used in a closed loop SRM position or... Read More
Inventors: Taylor, David G.; Rehman, Saeed Ur;, Assignee: Georgia Tech Research Corp. (Atlanta, GA) |
Sensorless detection of a locked rotor in a switched reluctance motor
The present invention provides a method and a circuit for detecting a locked rotor in a motor such as a switched reluctance motor. An object of the present invention is to provide a method and circuit... Read More
Inventors: Kalpathi, Ramani R.; Szymanski, Peter T.;, Assignee: Dana Corporation (Toledo, OH) |
Permanent magnet rotating electric machine and electrically driven vehicle employing same
It is an object of the present invention to provide a permanent magnet rotating electric machine which has small pulsating torque and cogging torque, and can be obtained smooth rotation thereof. It is... Read More
Inventors: Tajima, Fumio; Matsunobe, Yutaka; Kawamata, Shouichi; Shibukawa, Suetaro; Koizumi, Osamu; Oda, Keiji;, Assignee: Hitachi, Ltd. (JP); Hitachi Car Engineering Co., Ltd (JP) |
Switched reluctance motor
It is therefore an object of the present invention to provide an improved switched reluctance motor and an improved control system which solves the above described problems. As a general advantageous ... Read More
Inventors: Nashiki, Masayuki;, Assignee: Okuma Corporation (Nagoya, JP) |
Motor with reduced clogging torque incorporating stator salient poles and rotor magnetic poles
We claim: 1. A motor including a stator field core, wherein the number of magnetic poles of a rotor is set to 2P and the number of salient poles of the stator field core is set to 3P with respect to a... Read More
Inventors: Nakamura, Tomokazu; Masago, Ichiro; Uchida, Koichi;, Assignee: Matsushita Electric Industrial Co., Ltd. (Osaka, JP) |
Electric power steering control with torque ripple and road disturbance damper
The invention is an electric power steering control for a motor vehicle in which torque ripple communicated to the vehicle handwheel, as well as some road generated disturbances, is reduced. The contr... Read More
Inventors: Collier-Hallman, Steven James; Chandy, Ashok;, Assignee: Delphi Technologies, Inc. (Troy, MI) |
Electric motor and electric power steering apparatus employing the electric motor
Accordingly, it is an object of the invention to provide an electric motor and electric power steering apparatus employing the electric motor, having an improved motor efficiency and producing an incr... Read More
Inventors: Tomita, Masaaki; Mizutani, Ryoji;, Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota, JP) |
Electrical angle detecting apparatus and method, and motor control apparatus
The invention is intended to solve the aforementioned problems. It is an object of the invention to improve the precision in electrical angle detection. It is another object of the invention to reduce... Read More
Inventors: Koide, Satoshi; Kawabata, Yasutomo; Yamada, Eiji;, Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota, JP) |
Motor using rotor including interior permanent magnet, and apparatus-driving-unit employing the same motor
The present invention addresses the problems discussed above and aims to provide a motor with stable driving torque. A motor of the present invention having interior permanent magnets comprises the fo... Read More
Inventors: Asano, Yoshinari; Shinto, Masayuki; Yamamoto, Toshio;, Assignee: Matsushita Electric Industrial C., Ltd. (JP) |
Motor
The motor of the invention comprises a stator core having plural teeth and slots provided among these teeth, a winding making a single turn around each tooth and a rotor incorporating plural permanent... Read More
Inventors: Nishiyama, Noriyoshi; Nakamura, Tomokazu; Ikkai, Yasufumi; Honda, Yukio; Murakami, Hiroshi; Kawano, Shinichiro;, Assignee: Matsushita Electric Industrial Co., Ltd. (Osaka, JP) |
Permanent magnet motor
This invention has been achieved to solve the above-mentioned problem, and it is an object of the invention to provide a permanent magnet motor of high performance in which the cogging torque is reduc... Read More
Inventors: Nakano, Masatsugu; Tominaga, Tsutomu; Megata, Hideki;, Assignee: Mitsubishi Denki Kabushiki Kaisha (Tokyo, JP) |
Interior permanent magnet synchronous motor
The present invention has been made in view of the foregoing disadvantage of the prior art. Accordingly, it is an object of the present invention to provide a permanent magnet-equipped synchronous mot... Read More
Inventors: Miyashita, Toshihito; Onodera, Satoru; Matsushita, Manabu;, Assignee: Sanyo Denki Co., Ltd. (Tokyo, JP) |
Electric machine with integrated power electronics
Referring now to FIG. 1, an electric machine 10 is illustrated in a circumference mount configuration. Preferably, electric machine 10 is a three phase inductance motor. Electric machine 10 includes ... Read More
Inventors: Tabatowski-Bush, Ben; Grzybowski, James P.; Reddy, Prathap A.; Trublowski, John J.; Jairazbhoy, Vivek A.;, Assignee: Visteon Global Technologies, Inc. (Dearborn, MI) |
Brushless motor for partable electronic equipment with wire treatment technique of coils
Thus, the present invention has an object to provide a wire treatment technique which can make electrical connection without using a soldering material even when a terminal is used but a sufficient sp... Read More
Inventors: Yoshida, Shigeru; Fukuoka, Kodo; Kumoi, Masafumi; Kuyama, Koji;, Assignee: Matsushita Electric Industrial Co., Ltd. (Osaka, JP) |
Spindle motor
A primary object of the invention is to provide a spindle motor which makes it possible to prevent by a simple arrangement the potential difference corrosion between a bearing member and another membe... Read More
Inventors: Miura, Kazushi; Gomyo, Masato; Narita, Takayuki; Tago, Tokio; Yazawa, Takehiko;, Assignee: Kabushiki Kaisha Sankyo Seiki Seisakusho (Nagano, JP) |
Lanced strip and edgewise wound core
Among the several objects of the present invention may be noted the provision of an improved edgewise wound core and an improved lanced strip of generally thin metallic material adapted to be wound in... Read More
Inventors: Fritzsche, Harold L.;, Assignee: General Electric Company (Fort Wayne, IN) |
Generators or Motors 
