| A. O. SMITH CORPORATION Patent applications |
| Patent application number | Title | Published |
|---|
| 20100111508 | MIXED ENERGY HEATER WITH CONSTANT TEMPERATURE CONTROL - A type of mixed energy heater with constant temperature control, which belongs to the field of water heater technology. This water heater includes a gas heating portion, an electric heating portion, and a control circuit. The control circuit includes a power output controller. The electric heating portion is composed of water passage and electric heating device installed in the water passage. The water passages of the gas heating portion and the electric heating portion are connected together in series or in parallel, and the terminal of the passage is equipped with a temperature sensor. The output of the temperature sensor is connected to the signal input of the control circuit. | 05-06-2010 |
| 20100080714 | CONTROLLER FOR A MOTOR AND A METHOD OF CONTROLLING THE MOTOR - A pump system. The pump system includes a pump, a motor coupled to the pump, a sensor coupled to a power source, and a controller. The motor operates the pump. The sensor detects an electrical characteristic of the power source. The controller executes a fault check, controls the motor, detects a change in the electrical characteristic, and suspends the execution of the fault check for a predetermined period of time when the detected change in the electrical characteristic is outside of a valid characteristic range. | 04-01-2010 |
| 20100068073 | CONTROLLER FOR A MOTOR AND A METHOD OF CONTROLLING THE MOTOR - A method of controlling a motor operating a pumping apparatus of a fluid-pumping application. The pumping apparatus includes a pump having an inlet to receive a fluid and an outlet to exhaust the fluid, and the motor coupled to the pump to operate the pump. The method includes the acts of controlling the motor to operate the pump and monitoring the operation of the pump. The monitoring act includes monitoring a power of the motor, and determining whether the monitored power indicates an undesired flow of fluid through the pump. The method further includes the act of controlling the motor to cease operation of the pump when the determination indicates an undesired flow of fluid through the pump and zero or more other conditions exist. | 03-18-2010 |
| 20100026128 | INTERIOR PERMANENT MAGNET MOTOR INCLUDING ROTOR WITH UNEQUAL POLES - An electric machine includes a stator and a rotor core including a first rotor portion positioned adjacent the stator and having an outside diameter. The first rotor portion includes a plurality of elongated slots that define a plurality of poles. The electric machine also includes a plurality of magnets. Each of the plurality of magnets is positioned within one of the slots and arranged such that each of the plurality of poles has a magnetic arc length that is different than a magnetic arc length of any adjacent pole. | 02-04-2010 |
| 20100001598 | EXTERNAL VOLTAGE CHANGE DEVICE - A motor including a stator, a first connector portion, a selector, and a second connector portion. The stator has a first winding arrangement configured for a first voltage and a second winding arrangement configured for a second voltage different from the first voltage. The first connector portion is selectively connectable to each of the first winding arrangement and the second winding arrangement. The selector is movable between a first position in which the first connector portion is connected to the first winding arrangement, and a second position in which the first connector portion is connected to the second winding arrangement. The second connector portion is electrically connected to a power supply and selectively engageable with the first connector portion to provide power to one of the first winding arrangement and the second winding arrangement. | 01-07-2010 |
| 20090267432 | ASSEMBLY FOR AN ELECTRIC MACHINE - An electric machine includes a stator, a rotor positioned adjacent the stator and rotatable with respect to the stator, and a housing that at least partially surrounds the stator. An enclosure is coupled to the housing and includes a first compartment and a second compartment. A plurality of fins are positioned within the second compartment and a fan is coupled to the rotor and directs a flow of air through the second compartment. | 10-29-2009 |
| 20090085415 | STATOR ASSEMBLY FOR AN ELECTRIC MACHINE AND METHOD OF MANUFACTURING THE SAME - A stator for an electric machine includes a plurality of core segments interconnected with one another. At least one core segment includes a plurality of teeth and a back portion that at least partially interconnects the teeth. A first one-piece mold defines a first end insulator portion and a plurality of slot insulator portions, and a second one-piece mold defines a second end insulator portion and a second plurality of slot insulator portions. The plurality of core segments is positioned between the first mold and the second mold such that the molds align and insulate the core portions. The stator also includes a plurality of coils. Each coil surrounds at least a portion of one tooth. | 04-02-2009 |
| 20080303369 | ELECTRIC MOTOR, STATOR FOR AN ELECTRIC MOTOR AND METHOD OF MANUFACTURING SAME - An electric machine has a rotor and includes a first portion that is substantially rectangular and includes a rotor aperture configured to receive a portion of the rotor. A second portion is separate from and connected to the first portion. The second portion is substantially U-shaped and includes a first leg, a second leg, and a base. A first coil surrounds a portion of the first leg and a second coil surrounds a portion of the second leg. | 12-11-2008 |
| 20080272667 | INTERIOR PERMANENT MAGNET MOTOR AND ROTOR - An electric machine includes a stator and a rotor core positioned adjacent the stator and rotatable about a longitudinal axis. The rotor core includes a plurality of bar apertures, a plurality of elongated flux barriers separate from the bar apertures and positioned radially inward of the bar apertures, and a plurality of magnet slots separate from the bar slots and positioned radially inward of a portion of the bar apertures. The electric machine also includes a plurality of magnets, each positioned in one of the magnet slots. A plurality of conductive bars are each positioned in one of the bar apertures and includes a first end and a second end. A first end ring is coupled to the first end of each of the bars and a second end ring is coupled to the second end of each of the bars. | 11-06-2008 |
| 20080224558 | INTERIOR PERMANENT MAGNET MOTOR INCLUDING ROTOR WITH FLUX BARRIERS - An electric machine includes a stator, and a rotor positioned adjacent the stator and configured to rotate with respect to the stator. The rotor includes a plurality of laminations having an outside diameter and stacked in a stackwise direction. Each lamination includes a plurality of non-linear slots positioned inward of the outside diameter. Each non-linear slot includes an inner portion spaced a first distance from the outside diameter and two end portions disposed a second distance from the outside diameter. The second distance is smaller than the first distance. The rotor also includes a plurality of permanent magnets. Each magnet is disposed in one of the non-linear slots. | 09-18-2008 |
