Abstract: A control device (1) is configured to reduce the commutation angle error ? of a three-phase (u, v, w) EC motor (2.2) connected via a y-configuration. The three phases (u, v, w) are commutated via a motor control (3) including a rotor position sensor (4) and a control circuit (10). The rotor position sensor (4) senses the relative angular position of the rotor using the neutral-point potential at the neutral point of the y-configuration. The control circuit (10) is configured to impose a desired field weakening current component on the motor control (3) for reducing the commutation angle error ?.

Abstract: A control device (1) is configured to reduce the commutation angle error ? of a three-phase (u, v, w) EC motor (2.2) connected via a y-configuration. The three phases (u, v, w) are commutated via a motor control (3) including a rotor position sensor (4) and a control circuit (10). The rotor position sensor (4) senses the relative angular position of the rotor using the neutral-point potential at the neutral point of the y-configuration. The control circuit (10) is configured to impose a desired field weakening current component on the motor control (3) for reducing the commutation angle error ?.

Abstract: An AHU comprises a cabinet, a heat exchanger and a blower. The cabinet has an air inlet opening and an air outlet opening, panels are provided on sides of the cabinet forming an air flow path for air flowing through the air handling unit between the air inlet opening and the air outlet opening. The heat exchanger is disposed in the air flow path and adapted to conduct heat exchange between air passing through the air flow path and a working medium flowing in the heat exchanger. The heat exchanger includes an inlet header for supplying the working medium and an outlet header for collecting the working medium. The heat exchanger is slanted with respect to a side of the cabinet such that the inlet header and the outlet header extend through one of the sides of the cabinet for providing access to the inlet header and the outlet header from the one of the sides of the cabinet. The blower is vertically disposed relative to the heat exchanger in the cabinet for forcing air to flow through the air flow path.

Abstract: An AHU comprises a cabinet, a heat exchanger and a blower. The cabinet has an air inlet opening and an air outlet opening, panels are provided on sides of the cabinet forming an air flow path for air flowing through the air handling unit between the air inlet opening and the air outlet opening. The heat exchanger is disposed in the air flow path and adapted to conduct heat exchange between air passing through the air flow path and a working medium flowing in the heat exchanger. The heat exchanger includes an inlet header for supplying the working medium and an outlet header for collecting the working medium. The heat exchanger is slanted with respect to a side of the cabinet such that the inlet header and the outlet header extend through one of the sides of the cabinet for providing access to the inlet header and the outlet header from the one of the sides of the cabinet. The blower is vertically disposed relative to the heat exchanger in the cabinet for forcing air to flow through the air flow path.

Abstract: The invention relates to a method for sensor-free position determination of the rotor position of an electronically commutated multiple-phase EC motor comprising a rotor, and a stator and comprising a commutation device for generating string currents in the coil system of the stator by applying a test signal in the coil system, measuring the current value i in the strand during the measurement phase (PHMess) as a current response to the test signal, calculating i for determining the envelope determining of the current response and determining the rotor position therefrom.

Abstract: The invention relates to a method for sensor-free position determination of the rotor position of an electronically commutated multiple-phase EC motor comprising a rotor, and a stator and comprising a commutation device for generating string currents in the coil system of the stator by applying a test signal in the coil system, measuring the current value i in the strand during the measurement phase (PHMess) as a current response to the test signal, calculating i for determining the envelope determining of the current response and determining the rotor position therefrom.

Abstract: An anti-microbial heat transfer apparatus comprises a hybrid coil with multiple rows of fins and tubes. The fins and tubes have an upper portion and a lower portion. The upper portion comprises fins that include copper and has a height that is different than the height of the second portion. A chilled medium inside the tubes makes the surface of the fins and tubes colder than the temperature of the dew point of the surrounding air such that a condensate is formed on the surface of the fins. Gravity causes the condensate to drip copper ions from the upper portion to the lower portion of the coil resulting in the inhibition of microbial growth on the coil.

Abstract: An anti-microbial heat transfer apparatus comprises a hybrid coil with multiple rows of fins and tubes. The fins and tubes have an upper portion and a lower portion. The upper portion comprises fins that include copper and has a height that is different than the height of the second portion. A chilled medium inside the tubes makes the surface of the fins and tubes colder than the temperature of the dew point of the surrounding air such that a condensate is formed on the surface of the fins. Gravity causes the condensate to drip copper ions from the upper portion to the lower portion of the coil resulting in the inhibition of microbial growth on the coil.

Abstract: A method for making a cooked rolled snack food from a starch based dough. The starch based dough is admixed with a small average particle size monoglyceride. The dough is then rolled and cooked in hot oil. The fatty acid chain is disposed within the helical amylose molecules in the starch-based dough and provides structural support within the helix. This support helps control inward expansion of the rolled dough snack during frying.

Abstract: A plenum fan comprising a fan wheel disposed within a box-like enclosure includes a secondary inlet cone, a primary inlet cone, and a flexible duct. The two inlet cones convey air to the mouth of the fan wheel. A frame supports the fan wheel and the primary inlet cone such that the frame, the fan wheel and the primary inlet cone comprise a fan assembly. If the fan assembly shifts due to fan thrust or vibration, the fan assembly moves as a unit. The flexible duct connects the primary inlet cone to an inlet of the enclosure while isolating the fan assembly's vibration from the enclosure. The secondary inlet cone extends from the inlet of the enclosure, protrudes into or toward the primary inlet cone and provides a smooth airflow path over the abrupt shape of the flexible duct.

Abstract: A plenum fan comprising a fan wheel disposed within a box-like enclosure includes a secondary inlet cone, a primary inlet cone, and a flexible duct. The two inlet cones convey air to the mouth of the fan wheel. A frame supports the fan wheel and the primary inlet cone such that the frame, the fan wheel and the primary inlet cone comprise a fan assembly. If the fan assembly shifts due to fan thrust or vibration, the fan assembly moves as a unit. The flexible duct connects the primary inlet cone to an inlet of the enclosure while isolating the fan assembly's vibration from the enclosure. The secondary inlet cone extends from the inlet of the enclosure, protrudes into or toward the primary inlet cone and provides a smooth airflow path over the abrupt shape of the flexible duct.

Abstract: A method for making a cooked rolled snack food from a starch based dough. The starch based dough is admixed with a small average particle size monoglyceride. The dough is then rolled and cooked in hot oil. The fatty acid chain is disposed within the helical amylose molecules in the starch-based dough and provides structural support within the helix. This support helps control inward expansion of the rolled dough snack during frying.

Abstract: A cabinet for air handling equipment includes a door assembly having features such as inner and outer door panels being held together and sealed by double-sided tape, which acts as a thermal break, a latch that prevents a door gasket from being crushed due to positive or negative air pressure within the cabinet, and a doorframe that is easy to assemble and install for either right-hand or left-hand swinging doors. To assemble adjacent pieces of the doorframe, sheet metal tabs of one piece are inserted into slits of the other piece. The tabs are then twisted to hold the adjacent pieces of the doorframe together.

Abstract: A cabinet for air handling equipment includes a door assembly having features such as inner and outer door panels being held together and sealed by double-sided tape, which acts as a thermal break, a latch that prevents a door gasket from being crushed due to positive or negative air pressure within the cabinet, and a doorframe that is easy to assemble and install for either right-hand or left-hand swinging doors. To assemble adjacent pieces of the doorframe, sheet metal tabs of one piece are inserted into slits of the other piece. The tabs are then twisted to hold the adjacent pieces of the doorframe together.

Abstract: A suspension system for a component of an air conditioning system adapted for mounting the air conditioning system to a support surface. The suspension system is designed for use with an air conditioning system component that is mounted on spaced apart support rails. The suspension system is integrated into the support rail and eliminates the need for a self contained suspension system that must have specially designed mounting points for attachment to the support rails. The integrated design provides for resistance to lateral loads and facilitates the interchange and replacement of suspension system components. The suspension system comprises a spring for absorbing motion occurring between the air conditioning system component and the support surface. The spring has a first end and a second end, and defines a spring axis extending between the two ends. A receptacle is formed integral to a respective one of the support rails for supporting the first end of the spring.