Patent application number | Description | Published |
20080278101 | CONTROL SYSTEMS AND METHODS FOR PERMANENT MAGNET ROTATING MACHINES - Systems and methods for controlling a rotating electromagnetic machine. The rotating machine, such as a permanent magnet motor or hybrid switched reluctance motor, includes a stator having a plurality of phase windings and a rotor that rotates relative to the stator. A drive is connected to the phase windings for energizing the windings. A controller outputs a control signal to the drive in response to inputs of demanded torque, rotor position and/or speed. Control methods include calculating a scaled torque demand from the received torque demand to obtain substantially constant torque over a range of motor speeds, calculating an optimal dr-axis injection current using a cost function and a starting method that switches from speed control mode to torque control mode at a predetermined rotor speed or at predetermined start-up timing intervals. | 11-13-2008 |
20090300270 | Dynamoelectric machine assemblies having memory for use by external devices - A method is provided for storing data from an external device in a dynamoelectric machine assembly (i.e., an electric motor or generator). The dynamoelectric machine assembly includes a memory device and a processor for controlling operation of the dynamoelectric machine assembly in response to commands from an external device. The method includes receiving a command from the external device to store data in the memory device of the dynamoelectric machine assembly, and storing the data in the memory device in response to the command. Dynamoelectric machine assemblies, external devices and systems suitable for use in the provided method are also disclosed. | 12-03-2009 |
20100052592 | Dynamoelectric Machine Assemblies Operable With Serial Communication Signals And PWM 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. | 03-04-2010 |
20100068070 | FLOW CONTROL FOR FLUID HANDLING SYSTEM - A method of correcting fluid flow offset for an uncharacterized fluid handling system including a motor. The method includes running the motor at a reference fluid flow demand using generic coefficients, and changing fluid flow demand from the reference fluid flow demand until the motor signals a power limit condition. When the motor signals the power limit condition, the fluid flow demand is noted. The operational fluid flow demands are scaled by a ratio of the noted fluid flow demand to the reference fluid flow demand. | 03-18-2010 |
20100070205 | FLOW ESTIMATION FOR FLUID HANDLING SYSTEM - A method of estimating airflow for a characterized blower system including a motor. The method includes running the motor, estimating a torque and a speed of the running motor, and assuming a starting airflow estimate. Torque is calculated based on the estimated speed and the estimated airflow. A torque error is calculated as a function of the calculated torque and the estimated torque. Estimated airflow is revised based on the calculated torque error. The method also includes repeating the calculating and revising steps using the revised estimated airflow until the torque error is within a predetermined acceptable range. | 03-18-2010 |
20100204945 | System and Method for Detecting Fluid Delivery System Conditions Based on Motor Parameters - Systems and methods for detecting various system conditions in a fluid delivery system (such as an HVAC system) based on a motor parameter are disclosed. Embodiments of the present invention relate to detecting: filter condition, frozen coil condition, register condition, energy efficiency, system failure, or any combination thereof. Embodiments of the present invention relate to detecting fluid delivery system conditions based on motor parameters including system current, system power, system efficiency, motor current, motor power, motor efficiency, and/or a change (or rate of change) in motor parameters. Techniques for responding to a clogged filter and a frozen coil are also disclosed. Also disclosed are techniques for characterizing a fluid delivery system off-site, prior to system installation. | 08-12-2010 |
20110178773 | System and Method for Detecting Fluid Delivery System Conditions Based on Motor Parameters - Systems and methods for detecting various system conditions in a fluid delivery system (such as an HVAC system) based on a motor parameter are disclosed. Embodiments of the present invention relate to detecting: filter condition, frozen coil condition, register condition, energy efficiency, system failure, or any combination thereof. Embodiments of the present invention relate to detecting fluid delivery system conditions based on motor parameters including system current, system power, system efficiency, motor current, motor power, motor efficiency, and/or a change (or rate of change) in motor parameters. Techniques for responding to a clogged filter and a frozen coil are also disclosed. Also disclosed are techniques for characterizing a fluid delivery system off-site, prior to system installation. | 07-21-2011 |
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 |
20140132185 | System And Method For Variable Speed Motor Control With A Single Control Signal - In a motor control system, a controller generates a single control signal for a motor control unit in a first electric motor and another motor control unit in a second electric motor. The motor control units in the first and second electric motors operate the first and second electric motors at a first rate in response to the control signal being at a first level. The motor control unit in the first electric motor operates the first electric motor at a second rate and the motor control unit in the second electric motor operates the second electric motor at a third rate in response to the control signal being at a second level, the third rate being different than the second rate. | 05-15-2014 |
20140358458 | SYSTEMS AND METHODS FOR ESTIMATING INPUT POWER OF AN ELECTRIC MOTOR - A method of estimating an input power of a motor comprises determining an output power of the motor; determining a speed of the motor; calculating a scaling factor as a function of the speed of the motor; and estimating the input power as a function of the scaling factor and the output power. | 12-04-2014 |