Nidec Motor Corporation

Emerson Electric Company

Christopher D Schock

Prakash B Shahi

Randy L Bomkamp

Mark E Carrier

Bret S Clark

Douglas D Glenn

James L Skinner

Michael I Henderson

Anandan C Velayutham

Gregory A Peterson

Arthur E Woodward

Scott M Schroer

Robert J Ploof, Jr

Tarris A Reed

Liming Zhou

Ryan Timothy Wade

Morgan Jeremy Silvey

Robert J Ploof

An electric motor including a rotor defining an axis of rotation and an encoder. The encoder includes a magnetic composite part attached to the rotor, and a magnetic flux sensor positioned to detect magnetic flux resulting from movement of the magnetic composite part with rotation of the rotor.

Motor magnetic composite encoder

A system and method for identifying and responding to a condition in which an electric motor fails to start. A rotor core includes slots in which magnets are received to produce an electrical reluctance. A motor controller determines a position of the rotor, uses the determined position to convert a torque demand to a demanded D-axis current value, and compares the demanded value to a supplied D-axis current value. If the demanded value differs from the supplied value by at least a pre-established threshold amount, then the motor is restarted. Otherwise, the difference between the torque demand and an actual current is used to drive a voltage applied to the motor. The controller may also implement a sensorless technology, and may restart the motor if the demanded value differs from the supplied value by at least the threshold amount even if the sensorless technology determines that the motor started.

System and method for addressing failure-to-start condition in electric motor with internal magnets

A system and computer-implemented method for reducing an angle error in an estimated position of a rotor over various loads on an electric motor or type of electric motor. Electrical parameters of an electric motor are measured, a true rotor position is found, and sensorless gains based on the measured parameters are generated, including determining a sensorless angle. Data is gathered at multiple torque levels for at least one speed of the motor, including for each torque level, trying different inductance values, and determining an inductance value that results in an angle error of zero. The angle error is the difference between the true rotor position and the sensorless angle. The inductance value that results in an angle error of zero for each speed may be saved in an electronic memory and used to better control the motor or other motors of the same type.

System and computer-implemented method for reducing angle error in electric motors

A system and method for replacing a sixteen-pin ECM with a non-sixteen-pin, field adjustable ECM in an HVAC or other system, and adjusting the performance of the replacement motor at the point of installation. A converter module receives programming information from an existing control board via an existing sixteen-pin harness, and converts the information to six signals. The module includes potentiometers for tuning speed/torque for first and second settings, adjusting a horsepower output of the replacement ECM, and adjusting a ramp time to increase or decrease a rate at which the speed/torque changes. The module includes switches for selecting between clockwise and counterclockwise directions for the replacement ECM, selecting between PWM and non-PWM control, and selecting between torque and speed modes. A non-sixteen-pin motor controller receives the information from the converter module via a four-wire harness, translates the information, and outputs a control signal to the replacement ECM.

System and method for replacing 16-pin ECM motor with non-16-pin field adjustable ECM motor

A system and method for wirelessly communicating with an HVAC motor or other motor in order to manage the motor with regard to, e.g., identifying a suitable replacement for, programming, monitoring and/or diagnosing, and/or tuning or otherwise reprogramming the motor without physically connecting to the motor. A technician uses a software application on a smartphone, tablet, or other portable device to communicate with the motor controller via a wireless communication device incorporated into the motor assembly. The smartphone may receive relevant information, such as identification, programming, or diagnostic information, and process the information or wirelessly transmit the information to a server for processing. Based on the information, the smartphone may transmit programming instructions to the motor controller via the wireless communication device. Further, the wireless communication device may transmit sensor data associated with the motor to allow for monitoring the motor's performance.

System and method for wirelessly managing electric motors

A system-specific interface module for a motor control subassembly for controlling operation of an electric motor within a larger system which uses a particular system communication method. The motor control subassembly includes a standard power module and the interface module. The power module includes a controller processor configured to receive input for controlling and to generate output regarding operation of the motor. The interface module includes a communication interface hardware block configured to exchange input and output signals with the larger system, and an interface processor configured to translate the input and output signals between the particular system communication method used by the larger system and a standard internal communication method used by the power module. Thus, the motor control subassembly can be configured to accommodate any of a variety of different system communication methods and other input/output options by selecting and inserting the appropriate interface module.

System-specific interface module for motor control subassembly for electric motor

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.

Dynamoelectric machine assemblies having memory for use by external devices

A motor assembly broadly includes a motor, a motor controller, and an interface controller having an integrated power supply. The integrated power supply includes an AC to DC power conversion and voltage reduction component. The motor controller and the interface controller receive line voltage electrical power without the need for an external transformer.

Motor interface controller having an integrated power supply

A motor controller for providing a three-phase alternating current (AC) signal to a three-phase motor. The motor controller uses current feedback from a single shunt to monitor or control the three phase AC signal. The motor controller may include a three-phase DC to AC power inverter, a single-shunt current sensor, and a processor. During individual duty cycles when two or more phase signals are too close to each other, the processor may shift one of the phase signals in time so that its leading or trailing edges are a predetermined conflict time away from each other. Then, the processor may sample current from the single-shunt current sensor to determine currents of two of the three phase signals and then calculate current of a remaining one of the three phase signals. Sample times may depend on pulse widths and shifting of the phase signals.

Single-shunt current sensing for multi-phase motor

A motor control system for adjusting motor speed if a current overload condition occurs. The motor control system may include a motor, a power factor correction (PFC) circuit providing current to the motor, and a signal processor. The PFC circuit may limit current provided to the motor based on an output voltage sensed by the PFC circuit. The signal processor may sense input voltage of the PFC circuit to determine a power limit, then compare sensed or calculated drive power of the motor with the power limit. If the drive power sensed or calculated is greater than the power limit, the signal processor may output a signal for reducing the drive power to the power limit. Limiting the drive power provided to the motor limits or decreases a speed of the motor.

Motor control system and method for input current protection

A system for wirelessly programming and diagnosing a motor includes a server computer system, a portable electronic device, and a wireless communication device. The server computer system stores motor operating parameters and other motor data that can be accessed by the portable electronic device over a wireless communication network for identifying a suitable replacement motor for an unserviceable motor. The server computer system also generates motor programming instructions for programming the replacement motor to emulate the unserviceable motor. The portable electronic device wirelessly transmits the motor programming instructions to the wireless communication device for storing the motor programming instructions on a memory of a controller of the replacement motor so that the replacement motor will emulate the unserviceable motor.

Systems and methods for selecting and wirelessly programming a motor

An electric motor system having substantially independent hardware-based and software-based pathways for detecting and initiating responses to fault conditions, such as over-current conditions, in an electric motor which is powered by a power inverter which is controlled by a power module and a microprocessor. Each pathway involves comparing a voltage, which is representative of an electric current flowing to the motor, to a predetermined maximum voltage, and if the former exceeds the latter using hardware or software to initiate shutting off the motor, such as by shutting off the power inverter. When one pathway detects a fault condition it may notify the other pathway, and the notified pathway may also initiate shutting off the motor.

Growing community of inventors

O'Fallon, MO, United States of America

Christopher D Schock