Class / Patent application number | Description | Number of patent applications / Date published |
318772000 | Plural speed | 16 |
20080246429 | CONTROLLER OF ELECTRIC MOTOR - A controller of an electric motor for improving operation efficiency in performing electric conducting control of the electric motor of an axial air-gap type is provided. | 10-09-2008 |
20090256517 | WEIGHTED FIELD ORIENTED MOTOR CONTROL FOR A VEHICLE - A system for transitioned field oriented motor control is described. The system may include a module using a current-based algorithm to estimate flux and a module using a voltage-based algorithm to estimate flux. A weighting module operates over a transition range to transition between the flux estimate using the current-based algorithm to the flux estimate using the voltage-based algorithm based on a weighted combination of the flux estimates. Other embodiments are described and claimed. | 10-15-2009 |
20100109597 | METHOD AND APPARATUS FOR QUIET FAN SPEED CONTROL - A method for controlling the speed of an AC motor by means of an AC motor speed control having a plurality of capacitors operable to be selectively coupled in parallel electrical connection, the parallel coupled capacitors operable to be coupled in series electrical connection with the AC motor, the method comprising charging the capacitors up to substantially the same predetermined voltage prior to combining the capacitors in parallel electrical connection. | 05-06-2010 |
20110006721 | CONTROL OF AN ASYNCHRONOUS MOTOR - The invention relates to a device for controlling the speed and the rotation direction of an asynchronous motor ( | 01-13-2011 |
20110187306 | Method for Activating an Asynchronous Motor - The method for activating an asynchronous motor comprising at least two windings is provided, in order, for the purpose of a change in the rotational speed, to connect a first winding and at least one second winding by way of at least two electronic switches. On switching, both switches are opened for one or more time intervals in order to avoid current peaks. | 08-04-2011 |
20140084841 | MOTOR DRIVE CONFIGURATION SYSTEM AND METHOD - A motor drive comprises a power sub-assembly and a control sub-assembly removably secured to the power sub-assembly. The power sub-assembly contains all power electronic circuitry and driver circuitry for the power electronics. The control sub-assembly comprises control circuitry for implementing a motor control routine that generates control signals for the power sub-assembly. The control sub-assembly is configured to conform to a USB mass storage device class such that it will appear as an icon on a configuration station when coupled to the configuration station via a USB cable. Thereafter, the drive may be accessed by selecting the icon, and parameter file and data transfer may be performed, such as by drag-and-drop transfer steps. | 03-27-2014 |
318773000 | Pole changing | 10 |
20110309785 | 3T-Y WINDING CONNECTION FOR THREE PHASE MULTIPLE-SPEED MOTOR - A three-phase, multi-speed electric induction motor assembly is configured to include a controller to change motor speeds. The motor assembly includes a stator core assembly, a pair of main winding coil groups corresponding with each phase, and a pair of selectable extra winding coil groups corresponding with each phase. During the lower-speed operation, the controller connects a first set of three leads to a power source such that only the main coil groups are energized. During the higher-speed operation, the controller connects a second set of three leads to the power source such that both the main coil groups and the selectable extra coil groups are energized. | 12-22-2011 |
20120043921 | CONTROL OF POLE-CHANGE INDUCTION MOTORS - A ram air fan control system includes a ram air fan motor, the ram air fan motor being a pole-change induction motor with at least two pole-count configurations, a ram air fan contactor in operative communication with a first pole-count configuration of the ram air fan motor over a ram air fan conductor bus, a ram air fan power controller in operative communication with the ram air fan contactor, a common contactor in operative communication a second pole-count configuration of the ram air fan motor over a common conductor bus, the common conductor bus being separate and electrically isolated from the ram air fan conductor bus, and a common power controller in operative communication with the common contactor. | 02-23-2012 |
20140265994 | Dynamically Reconfigurable Motor and Generator Systems - An electrical machine comprises a rotor, and a stator magnetically coupled to the rotor and having a plurality of slots and a plurality of windings, wherein each winding is installed in a corresponding slot, a plurality of magnetic poles and a plurality of phases in each pair of poles are formed when currents flow through the windings, and the windings are so configured that the number of phases and the number of poles can be dynamically adjusted. | 09-18-2014 |
318774000 | Single phase motor | 4 |
318775000 | Separate primary running winding for each pole number, alternately energized | 2 |
20110109258 | 2 SPEED 2/4-POLE PSC/PSC MOTOR WITH INDEPENDENT MAIN WINDINGS AND SHARED AUXILIARY WINDING - A PSC/PSC motor for 2-pole operation and 4-pole operation. The motor uses an independent 2-pole main winding and an independent 4-pole main winding. An auxiliary winding includes an independent 2-pole auxiliary winding, an independent 4-pole auxiliary winding, and a shared auxiliary winding used in both the 2-pole operation and the 4-pole operation. | 05-12-2011 |
20120062165 | DUAL-SPEED SINGLE-PHASE AC MOTOR - A dual-speed single-phase AC motor, including: a stator, including a stator core, and a coil winding, including a starting winding, a first main winding, and a second main winding, a rotor, and a starting circuit, including a rectifying and voltage-stabilizing circuit, a detecting circuit, a voltage comparison circuit, a first switching circuit, a second switching circuit, and a third switching circuit. The number of poles of the starting winding is the same as that of the first main winding. The number of poles of the first main winding is less than that of the second main winding. | 03-15-2012 |
318776000 | Entire primary running winding energized for each running speed | 2 |
20100039060 | TWO SPEED INDUCTION MOTOR WITH TAPPED AUXILIARY WINDING - A six lead, two speed, consequent wound, single phase induction motor with a tapped auxiliary winding having a 2-pole high speed mode and 4-pole low speed mode. A portion of the auxiliary winding is connected in series with the four pole main winding. The 4-pole low speed mode has an efficiency of over 80%. | 02-18-2010 |
20100123427 | PSC Motor with 4/6 Pole Common Windings - A PSC motor includes a stator core, a rotor arranged in a rotation relationship with respect to the stator core, a first to eighth winding coil sets wound around the stator core and a capacitor. The motor has two kinds of configurations for 4-pole and 6-pole operation modes, respectively. The configuration for the 4-pole mode comprises a primary winding and a secondary winding which is connected in series with the capacitor, and has two reversible operation directions. When operating at one direction, the primary winding includes the first to fourth winding coil sets, and the secondary winding includes the fifth to the eighth winding coil sets; and when operating at another direction, the primary winding includes the fifth to the eighth winding coil sets, and the secondary winding includes the first to fourth winding coil sets. Also, the configuration for the 6-pole mode comprises a primary winding and a secondary winding which is connected in series with the capacitor, and has two reversible operation directions. When operating at one direction, the primary winding includes the first, second, fifth and seventh winding coil sets, and the secondary winding includes the third, fourth, sixth and eighth winding coil sets; and when operating at another direction, the primary winding includes the third, fourth, sixth and eighth winding coil sets, and the secondary winding includes the first, second, fifth and seventh winding coil sets. | 05-20-2010 |
318777000 | Separate primary running winding for each pole number, alternately energized | 3 |
20080265828 | VARIABLE FREQUENCY REDUCED SPEED VARIATION ELECTRIC DRIVE - A multiple-winding induction machine may be used to obtain a reduced-speed-variation electric drive when using a variable-frequency power distribution system. Each winding may have a different number of poles. The winding with the smallest number of poles may operate the machine at the lowest bus frequency, while the winding with the largest number of poles may operate the machine at the highest bus frequency. In one embodiment, a third winding, with a middle number of poles, may operate the machine at the middle frequency ranges. The speed of the induction machine is a function of the electrical frequency and the number of the winding poles. Therefore, the operating speed range can be reduced by switching from one winding to another. According to the present invention, windings with different numbers of poles can be designed to achieve different reductions in speed variation. | 10-30-2008 |
20110187307 | MULTI-SPEED INDUCTION MOTOR - A multi-speed induction motor includes at least two stator windings (a low pole count winding and a high pole count winding) wound around a common stator core. A plurality of stator teeth extend radially inward from a stator yoke, thereby defining a plurality of slots open to its inner diameter. The high pole count winding is wound around the stator core first, such that the high pole count winding is located adjacent to the stator yoke. The low pole count winding is wound subsequently, such that it is radially interior to the high-pole count winding. | 08-04-2011 |
20160056747 | Dynamically Reconfigurable Motor and Generator Systems - An electrical machine comprises a rotor, and a stator magnetically coupled to the rotor and having a plurality of slots and a plurality of windings, wherein each winding is installed in two corresponding slots, a plurality of magnetic poles and a plurality of phases in each pair of poles are formed when currents flow through the windings, and the windings are so configured that the number of phases and the number of poles can be dynamically adjusted. | 02-25-2016 |