Abstract: A blender tub for hydraulic fracturing operations and associated components are provided. A spinning proppant distributor located above the blender tub liquid level interrupts and redirects falling granular proppant material (e.g. sand) into the tub. A fluid intake channel wraps around at least part of the blender tub outside wall and introduces liquid (e.g. water) into the blender tub via a plurality of channels. The liquid is introduced with a force and angle which imparts a vortex within the blender tub. The above aspects facilitate blending of material within the tub.

Abstract: A blender tub for hydraulic fracturing operations and associated components are provided. A spinning proppant distributor located above the blender tub liquid level interrupts and redirects falling granular proppant material (e.g. sand) into the tub. A fluid intake channel wraps around at least part of the blender tub outside wall and introduces liquid (e.g. water) into the blender tub via a plurality of channels. The liquid is introduced with a force and angle which imparts a vortex within the blender tub. The above aspects facilitate blending of material within the tub.

Abstract: A washing machine appliance includes a tub, a rotatable basket within the tub, and an annulus defined between the tub and the basket. A method of operating the washing machine appliance includes activating a drain pump to remove standing wash liquid from the annulus. The method also includes deactivating the drain pump after removing the standing wash liquid and rotating the basket within the wash tub for a first time period after deactivating the drain pump. The drain pump remains deactivated during the first time period. The method further includes determining a level of wash liquid in the annulus after rotating the basket within the wash tub for the first time period and determining a load type of the load of articles based on the level of wash liquid in the annulus after rotating the basket within the wash tub for the first time period.

Abstract: A method of operating a compressor includes obtaining a mechanical angle and an angular speed of a rotor, determining an amplitude of a fundamental harmonic of a periodic load torque exerted on the rotor based at least in part on the mechanical angle and a harmonic series representation of the periodic load torque, obtaining a speed error by subtracting the angular speed from a reference angular speed, determining a DC component of the periodic load torque based at least in part on a speed error and a closed loop feedback control algorithm, calculating an electromagnetic torque using the DC component of the periodic load torque and the amplitude of the fundamental harmonic of the periodic load torque, and operating the electric motor to generate the calculated electromagnetic torque on the rotor.

Abstract: A system and method for converting a common hydrogen-based input fluid into an output fluid comprising an overabundance of hydrogen H1 atoms is disclosed. This conversion occurs in the absence of elevated temperatures or pressures, so that the resulting output fluid is suitable for shipping or storage at Standard Temperature and Pressure (STP). A vaporizer system and method for transforming the output fluid into H2 gas is also disclosed.

Abstract: A system and method for converting a common hydrogen-based input fluid into an output fluid comprising an overabundance of hydrogen H1 atoms is disclosed. This conversion occurs in the absence of elevated temperatures or pressures, so that the resulting output fluid is suitable for shipping or storage at Standard Temperature and Pressure (STP). A vaporizer system and method for transforming the output fluid into H2 gas is also disclosed.

Abstract: The present disclosure relates to the use of stimulators of soluble guanylate cyclase (sGC), pharmaceutically acceptable salts thereof and pharmaceutical formulations or dosage forms comprising them, either alone or in combination with one or more additional therapeutic agents, for treating post-menopausal women with heart failure with preserved ejection fraction (HFpEF).

Abstract: A method for operating a salient motor is provided. In one example implementation, the method can include determining, via a controller of the motor, a series of estimated injection angles. The method can further include injecting, via the controller, a high-frequency signal into the motor at each of the series of estimated injection angles to provide a series of high-frequency signal injections. The method can further include, responsive to each of the series of high-frequency signal injections, processing, via the controller, one or more signals associated with each of the series of high-frequency signal injections. The method can further include determining, via the controller, one or more operating parameters based at least in part on the series of estimated injection angles.

Abstract: A method of operating a rolling piston compressor includes determining a pressure difference (?P) between a discharge pressure (Pd) within a compression volume and a suction pressure (Ps) within a suction volume; determining a pressure ratio (rp) equal to the discharge pressure (Pd) over the suction pressure (Ps); estimating a discharge pressure (Pd) based at least in part on the pressure difference (?P) and the pressure ratio (rp); determining that the discharge pressure (Pd) is greater than a predetermined pressure limit (Pd-limit); and lowering a target speed (?target) of the rolling piston compressor.

Abstract: A method for operating a linear compressor of an appliance, such as a refrigerator appliance, is provided. In one example implementation, the method can include operating a motor of the linear compressor in order to drive a rotor of the motor. The method can further include obtaining, via a controller of the linear compressor, one or more feedback measurements of one or more electrical characteristics of the motor. The method can further include controlling, based at least in part on the one or more feedback measurements, the motor of the linear compressor using a single-phase vector-like control scheme.

Abstract: A method for operating an appliance, such as a stand mixer, is provided. In one example implementation, the method can include operating a motor of the appliance in a first direction. The method can further include detecting, by a feedback system of the appliance, a first trigger condition. The method can further include, responsive to detecting the first trigger condition, operating the motor of the appliance in a second direction that is different than the first direction.

Abstract: A method for operating an appliance, such as a stand mixer appliance, is provided. In one example implementation, the method can include injecting, via a controller of the stand mixer appliance, a high-frequency signal into a motor of the stand mixer appliance. The method can further include, responsive to injecting the high-frequency signal into the motor, processing, via the controller, one or more signals associated with the high-frequency signal injection. The method can further include, responsive to processing the one or more signals associated with the high-frequency signal injection, determining, via the controller, one or more operating parameters based at least in part on the high-frequency signal injection.

Abstract: A stand mixer appliance is provided. In one example implementation, the stand mixer can include a base, a housing, a mixer shaft rotatably mounted on the housing, and a motor assembly. The motor assembly can include a motor drive and a motor operably coupled to the mixer shaft. A controller can be operably coupled to the motor drive. The motor assembly can further include a sensorless feedback system configured to obtain feedback measurements of one or more electrical characteristics from the motor. The feedback system can include an observer configured to process the one or more electrical characteristics and provide data indicative of a position or a speed of the motor. In turn, the controller can operate the motor drive based at least in part on the data indicative of the position or the speed of the motor.

Abstract: A method for operating an appliance, such as a stand mixer appliance, is provided. In one example implementation, the method can include operating a motor of the stand mixer appliance in order to rotate a mixer shaft of the stand mixer appliance. The method can further include determining, via a controller of the stand mixer appliance, a difference between an operating parameter and an operating parameter threshold. The method can further include implementing, via the controller of the stand mixer appliance, a field-weakening operation to increase a speed of the motor based at least in part on the difference.

Abstract: The invention herein relates to a curable composition, such as UV or EB curable composition, comprising: a metal salt comprising an anionic form of an organic compound, which organic compound comprises at least one polymerisable unsaturated group and an acidic hydrogen; and water. The curable composition is suitable for priming, printing on, or varnishing a substrate, as well as to methods of preparing said compositions, methods for priming, printing on, or varnishing a substrate, and printing presses utilising said compositions.

Abstract: A method for operating a voltage source inverter is provided, the method including inducing, via the voltage source inverter, a DC current at a load device to obtain a load voltage value; determining an ideal switching-averaged voltage based on a switching modulation scheme; determining a combined semiconductor voltage drop and deadtime effect; and adjusting the switching modulation scheme such that a resulting ideal switching-averaged voltage is based on the combined semiconductor voltage drop and deadtime effect and the load voltage value.

Abstract: A method of operating a compressor includes obtaining a mechanical angle and an angular speed of a rotor, determining an amplitude of a fundamental harmonic of a periodic load torque exerted on the rotor based at least in part on the mechanical angle and a harmonic series representation of the periodic load torque, obtaining a speed error by subtracting the angular speed from a reference angular speed, determining a DC component of the periodic load torque based at least in part on a speed error and a closed loop feedback control algorithm, calculating an electromagnetic torque using the DC component of the periodic load torque and the amplitude of the fundamental harmonic of the periodic load torque, and operating the electric motor to generate the calculated electromagnetic torque on the rotor.

Abstract: A motor system can include a motor configured to be operated according to at least a portion of an operation cycle specifying at least one target speed for the motor and a controller configured to obtain an estimated winding resistance of the motor, wherein the estimated winding resistance is determined based at least in part on an estimator gain factor, and wherein the estimator gain factor is inversely dependent on a speed of the motor; wherein the at least one target speed comprises at least one low speed such that at least a portion of the operation cycle is a low speed portion of the operation cycle, the at least one low speed having a speed of less than about 10 percent of a maximum speed of the operation cycle.

Abstract: A method of operating a rolling piston compressor includes determining a pressure difference (?P) between a discharge pressure (Pd) within a compression volume and a suction pressure (Ps) within a suction volume; determining a pressure ratio (rp) equal to the discharge pressure (Pd) over the suction pressure (Ps); estimating a discharge pressure (Pd) based at least in part on the pressure difference (?P) and the pressure ratio (rp); determining that the discharge pressure (Pd) is greater than a predetermined pressure limit (Pd-limit); and lowering a target speed (?target) of the rolling piston compressor.

Abstract: A method for operating an appliance motor includes receiving a target speed for the motor, obtaining a power limit for the motor, determining an inverter current limit based at least in part on the target speed and the power limit, determining an inverter output current to achieve the target speed, wherein the inverter output current is limited to the inverter current limit, and supplying the motor with the inverter output current.