| Nidec Motor Corporation Patent applications |
| Patent application number | Title | Published |
|---|
| 20120104878 | PUMP MOTOR CONTROL ASSEMBLY - A pump motor assembly operable to provide driving power to a fluid pump includes a rotor, a stator, a case housing the rotor and the stator, and a control assembly mounted to the case and operable to control motor operation. The control assembly includes an information display and a cover overlying the display, with a window section in general alignment with the display. The control assembly also includes a filler plate underlying the window section to prevent any air gap along an underside thereof, allowing the display to be visible while reducing the risk of condensation buildup. The control assembly further includes a low voltage housing with the display disposed in a first compartment defined thereby, and a high voltage housing with a high voltage component disposed in a second compartment defined thereby. The low voltage housing includes a thermal and fluid barrier that substantially fluidly separates the first and second compartments to reduce the risk of liquid electrical conduction therebetween and to reduce heat transfer into the low voltage housing. | 05-03-2012 |
| 20120096902 | INTEGRATED MOTOR AND CONTROL - An integrated motor and control system has an electric motor. A control controls operation of the motor. A housing substantially covers at least two sides of the control. The housing has an opening and a liquid guide for guiding liquid toward a predetermined position in the opening to prevent liquid from contacting the control. The control is mounted on at least one of the electric motor and the housing. A heat sink can be extended through the opening in the housing to cool the control. The liquid guide can facilitate natural convection over the portion of the heat sink exterior of the housing. The integrated motor and control system can suitably be used in a washing machine or other appliance where liquid may be encountered. | 04-26-2012 |
| 20120013212 | LIQUID DEFLECTING BAFFLE FOR AN ELECTRIC MOTOR - A fluid deflecting baffle is provided for use on an electric motor to be used in an environment where liquid may otherwise pass through a vent opening in an endshield of the motor. The baffle is secureable to the endshield and extends in a partial covering relationship with the vent opening. The baffle includes a vent passage therethrough and has at least one liquid flow obstructing louver that extends across the vent opening to deflect liquid away from the vent passage while allowing venting air to flow through the vent passage. The louver includes a generally flat liquid deflection surface that is disposed at an oblique angle relative to the axis of the motor and at least partially faces a venting direction of incoming air and fluid. | 01-19-2012 |
| 20120012772 | ENCAPSULATED OUTER STATOR ISOLATED ROTOR STEPPER MOTOR VALVE ASSEMBLY - An electric motor assembly includes a rotor rotatable about an axis and a stator spaced radially away from the rotor. An isolation housing, configured to permit magnetic flux to flow therethrough between the rotor and the stator, is disposed between the rotor and the stator and defines an internal rotor chamber, in which the rotor is located. The isolation housing fluidly isolates the internal rotor chamber from the stator. An encapsulating cover is provided that radially and axially surrounds the stator. The cover is formed of a resin material and bonds the stator to the isolation housing to prevent relative movement therebetween. | 01-19-2012 |
| 20120012288 | DYNAMOELECTRIC MACHINE ASSEMBLIES OPERABLE WITH SERIAL COMMUNICATION SIGNALS AND WM CONTROL SIGNALS - A dynamoelectric machine assembly for connection to a system controller. The assembly includes at least one input contact for receiving a control signal from the system controller and a processor coupled to the input contact. The processor is configured to operate the assembly in a pulse width modulation (PWM) mode when the control signal is a PWM control signal and to operate the assembly in a serial mode when the control signal is a serial communication signal. | 01-19-2012 |
| 20110314616 | WASHING MACHINE OUT OF BALANCE DETECTION - A method of operating a washing machine to detect unbalanced loads has been developed. The method includes operating a motor to rotate a tub holding a load at a first rotational rate that is below a threshold rotational rate, identifying a mass of the load, operating the motor to rotate the tub at a second rotational rate that is above the threshold rotational rate, identifying a power applied to the motor to continue rotation of the tub at the second rotational rate, obtaining an out of balance mass value from a memory with reference to the power applied to the motor, second rotational rate, and identified mass, identifying a maximum rate for the tub with reference to the out of balance mass value, and operating the motor to rotate the tub at a rate that is less than or equal to the maximum rate. | 12-29-2011 |
| 20110291520 | ALIGNMENT OF SEGMENTED STATORS FOR ELECTRIC MACHINES - A stator segment for a segmented stator of an electric machine includes insulative material configured for overlapping with insulative material of an adjacent stator segment to provide continuous insulation along a joint between the adjacent stator segments. Additionally, or alternatively, the stator segment can include one or more alignment tabs configured to engage a surface of an adjacent stator segment to inhibit relative axial movement between adjacent stator segments. | 12-01-2011 |
| 20110266898 | Cooling System for a Motor and Associated Electronics - A cooling system is provided for an electric motor having control circuitry and including a motor housing surrounding the motor. The motor drives at least one radial fan at one end thereof for directing airflow through the motor housing across the motor. A fan housing encloses the cooling fan and defines a diverter chamber radially outboard of the fan that is sized to divert a portion of the airflow away from the electric motor. A control box contains the control circuitry and includes a base having a heat sink for contacting the control circuitry. The base defines a plenum in communication with the diverter chamber and a channel in communication with the plenum and the heat sink to direct the diverted airflow across the heat sink. | 11-03-2011 |
| 20110260666 | BLOWER MOTOR FOR HVAC SYSTEMS - A blower motor assembly having a variable speed motor that is suitable for direct, drop-in replacement in a residential HVAC (heating, ventilation, and air conditioning) system that employs a PSC motor. The blower motor assembly includes at least a neutral input and two hot AC line connections, one for connection to the heating power source and the other to the cooling power source. A sensing circuit senses which of the inputs is energized by sensing either voltage or current on the inputs. The sensing circuit delivers a corresponding signal to a motor controller to control the speed of the variable speed motor. The blower motor assembly may also be equipped with additional hot AC inputs, more than one neutral line, and several sensing circuits for sensing current or voltage in the hot inputs and/or the neutral lines for controlling various aspects of the variable speed motor. | 10-27-2011 |
| 20110257910 | Method for Calibrating a Motor Control Circuit to Improve Temperature Measurement in an Electrical Motor - A method enables adjustment of a current sense voltage for accurate measurement of an operating temperature for an electrical motor. The method includes identifying a DC input voltage to a motor winding and a duty cycle corresponding to the DC input voltage, the duty cycle being identified with reference to a linear relationship between two inverter loss factors established for different DC input voltages within a range of voltages for the DC input voltage. A voltage across the motor winding is identified with reference to the identified duty cycle, the identified voltage not including voltage dropped across an inverter used to apply the DC input voltage to the motor winding. The identified voltage across the motor winding is used to identify a resistance change for the motor winding. | 10-20-2011 |
| 20110148245 | ASSEMBLING METHOD FOR A STATOR AND STATOR PRODUCED THEREBY - A laminated stator and a method for making a laminated stator of an electric motor. The method includes arranging a plurality of stator laminations into lamination stacks spaced axially from one another, each lamination stack including a first group of stator laminations including an annular portion and a plurality of tooth portions extending from a periphery of the annular portion, and a second group of stator laminations including only tooth portions positioned to correspond with the tooth portions of said first group. The method further includes winding stator windings around selected subsets of the plurality of teeth while the lamination stacks are spaced axially and meshing the lamination stacks with one another so the annular portions of the lamination stacks are axially adjacent one another and the plurality of teeth are intermeshed with the plurality of another stack. | 06-23-2011 |
