Abstract: Pressure sensors are configured for accurate, non-position sensitive pressure measurement. They can offer microprocessor-based features for optimized measurement, control, and signaling using precision-calibrated silicon piezoresistive microelectromechanical (MEMS) sensors provisioned within a durable, versatilely mountable housing. Such sensors can be mounted readily in alternate locations, configurations, and/or positions. They can also offer real-time temperature compensation, enable selectable analog outputs (such as 2-wire mA, 3-wire mA, or 3-wire V signals), enable adjustable range or subrange selection, support uni- or bi-directional settings, and allow local (pushbutton) or remote (via dry contacts) zeroing for accuracy.

Abstract: A motor control system to drive an alternating-current (AC) motor, including a motor drive with a power circuit and a motor drive controller powered by the power circuit and configured to cause the power circuit to generate a motor voltage; a motor drive contactor having first contacts electrically connected between the power circuit and the AC motor; a bypass contactor having second contacts electrically connected between a line voltage source and the AC motor; and a bypass controller communicatively coupled with the motor drive contactor and the bypass contractor; wherein the motor drive controller is structured to generate a speed reference and to command the bypass controller to connect the AC motor to the line voltage source upon the motor drive controller determining that the speed reference is substantially equal to a line frequency of the line voltage source.

Abstract: A motor drive and method of controlling a motor are provided. The motor drive includes a controller generating a motor reference voltage; a DC bus providing a DC voltage having a ripple; an inverter including power switches operable to convert the DC voltage into an AC motor voltage by modulating the power switches during a plurality of switching cycles, the AC motor voltage based on the motor reference voltage; a capacitor circuit coupled to the DC bus and having a maximum capacitance that is less than 10 microfarads per ampere of a rated current; and voltage prediction logic structured to: detect a voltage value corresponding of the ripple during each of the plurality of switching cycles; and modify the motor reference voltage during each of the plurality of switching cycles using the voltage value.

Abstract: In the field of motor protection for industrial automation systems, HVAC systems, pumping systems, and/or similar implementations, improved motor starters and overload electronics can be configured to offer substantially automatic levels of protection for motors, independent of such starters and/or overload electronics first being calibrated for, or properly calibrated for, the motor.

Abstract: A motor control system to drive an alternating-current (AC) motor, including a motor drive with a power circuit and a motor drive controller powered by the power circuit and configured to cause the power circuit to generate a motor voltage; a motor drive contactor having first contacts electrically connected between the power circuit and the AC motor; a bypass contactor having second contacts electrically connected between a line voltage source and the AC motor; and a bypass controller communicatively coupled with the motor drive contactor and the bypass contractor; wherein the motor drive controller is structured to generate a speed reference and to command the bypass controller to connect the AC motor to the line voltage source upon the motor drive controller determining that the speed reference is substantially equal to a line frequency of the line voltage source.

Abstract: A motor control system to drive an alternating-current (AC) motor. The motor control system includes a motor drive. The motor drive may include a duct having first, second and third openings. The motor control system may include a bypass circuit to power the AC motor if the motor drive experiences a fault or to save energy.

Abstract: A motor control system to drive an alternating-current (AC) motor. The motor control system includes a motor drive. The motor drive may include a duct having first, second and third openings. The motor control system may include a bypass circuit to power the AC motor if the motor drive experiences a fault or to save energy.

Abstract: A motor drive and method of controlling a motor are provided. The motor drive includes a controller generating a motor reference voltage; a DC bus providing a DC voltage having a ripple; an inverter including power switches operable to convert the DC voltage into an AC motor voltage by modulating the power switches during a plurality of switching cycles, the AC motor voltage based on the motor reference voltage; a capacitor circuit coupled to the DC bus and having a maximum capacitance that is less than 10 microfarads per ampere of a rated current; and voltage prediction logic structured to: detect a voltage value corresponding of the ripple during each of the plurality of switching cycles; and modify the motor reference voltage during each of the plurality of switching cycles using the voltage value.

Abstract: Improved motor starters and/or overload electronics are presented for industrial automation systems, HVAC systems, pumping systems, and/or similar implementations. Protective devices can be configured to offer substantially automatic control and/or protection for motors without first being manually calibrated, or properly calibrated, for the motor. An overload, motor starter, and/or other motor protection and/or control device can accommodate substantially universal voltage input, true power characteristic sensing for status output/annunciation, integrated damper control, and substantially automated protection and/or trip point selection and/or protective parameter calculation and implementation with reference to startup values and/or system parameters such as full load amperage (FLA), motor classification, motor horse power, monitored current, monitored voltage, and true power characteristics, including power factor values.

Abstract: Starter apparatuses are provided for multiple-winding motors. Such starters can function with a single/combined overload device/circuit, rather than requiring multiple overloads relays and separate overload trip circuits for each motor winding. A microcontroller can keep track of the applicable overload trip points and can control multiple discrete contactors appropriately, via a single/combined overload relay. For a specific implementation, additional and/or alternative desirable functionality can also be afforded, including universal voltage input, true power characteristic sensing for status output/annunciation, integrated damper control, and substantially automated trip point selection and/or implementation.

Abstract: In the field of motor protection for industrial automation systems, HVAC systems, pumping systems, and/or similar implementations, improved motor starters and overload electronics can be configured to offer substantially automatic levels of protection for motors, independent of such starters and/or overload electronics first being calibrated for, or properly calibrated for, the motor.

Abstract: In the field of variable-speed motor control, a bypass circuit and corresponding bypass electronics can be integrated advantageously with a variable-frequency drive (“VFD”) circuit and corresponding electronics. Such an integrated bypass can be disposed within a single unitary enclosure housing the VFD. Some advantages of the integrated bypass include reduced size, cost, and/or complexity in the combined VFD/bypass assembly, the ability to manage airflow in bypass without running a fan motor full time, and support for integrated power metering.

Abstract: A surface mount package for containing a board-mounted power supply, a method of manufacturing the same and a board-mounted power supply employing the package. In one embodiment, the package includes: (1) a plurality of leads having first ends and second, surface mount ends, (2) a dielectric lead frame that retains the plurality of leads in predetermined positions relative to one another such that at least some of the second, surface mount ends are co-planar, the first ends couplable to the board-mounted power supply, (3) a shell, coupled to the lead frame, that forms a portion of a periphery of the surface mount package and (4) potting material located between the lead frame and the shell.

Abstract: A system for portably mixing the contents of a transport tank in an inexpensive, portable manner which is adaptable for use in conjunction with non-specialized container tanks and the like, providing a temporary system to convert a container tank into a sparger tank.