Motor controller for electric blower motors

    公开(公告)号:US10425029B1

    公开(公告)日:2019-09-24

    申请号:US15995950

    申请日:2018-06-01

    Abstract: A motor controller for an electric motor includes a drive circuit that regulates power supplied to a stator of the electric motor to turn a rotor. The motor controller includes a communication interface that receives coefficients. The motor controller includes a processor coupled to the drive circuit. The processor receives an airflow rate demand, computes a speed, computes a torque set point as a function of at least a sum of first and second terms. The first term is defined as the first coefficient multiplied by the airflow rate demand raised to a power greater than one, and the second term is defined as the second coefficient multiplied by the speed raised to a power greater than one. The processor controls the drive circuit based on the torque set point to supply electrical power to the electric motor.

    ADAPTOR MODULE AND METHODS FOR CONTROLLING A REPLACEMENT MOTOR

    公开(公告)号:US20190277527A1

    公开(公告)日:2019-09-12

    申请号:US15914539

    申请日:2018-03-07

    Abstract: An adaptor module and methods for controlling a replacement motor in a heating, ventilation, and air conditioning (HVAC) system are provided. The adaptor module includes a plurality of tap connectors, each configured to receive a control signal. The adaptor module also includes a user interface having a plurality of switches that are adjustable into a plurality of different configurations, wherein each of the plurality of configurations correlates to at least one stored operating parameter for application to the motor. The adaptor module also includes a processing device configured to determine an operating parameter at which to operate the motor based on the configuration of the plurality of switches and based on a determination of which tap connector is receiving the control signal. The adaptor module also transmits a command signal including instructions for the motor to operate in accordance with the determined operating parameter.

    FILTER SYSTEMS FOR REDUCING BEARING CURRENT IN HIGH-FREQUENCY MOTOR CONTROL SYSTEMS

    公开(公告)号:US20190273429A1

    公开(公告)日:2019-09-05

    申请号:US15911835

    申请日:2018-03-05

    Abstract: A motor controller and methods for operating a motor are described herein. The motor controller includes a high-frequency (HF) inverter having a direct current (DC) input stage and an alternating current (AC) output stage, the HF inverter operable at a switching frequency to generate a three-phase output having a fundamental frequency. The motor controller also includes a differential mode (DM) filter coupled in series with the output stage of the HF inverter and having a resonant frequency less than 10% of the switching frequency, the DM filter configured to reduce harmonic components of the three-phase output and generate a first filtered output. The motor controller further includes a common mode (CM) filter coupled in series with the DM filter, the CM filter configured to filter the first filtered output to generate a second filtered output having a reduced CM voltage to operate the electric motor with a reduced bearing current.

    Motor controller for electric blower motors

    公开(公告)号:US10294950B2

    公开(公告)日:2019-05-21

    申请号:US15595420

    申请日:2017-05-15

    Abstract: A motor controller for an electric motor is provided. The electric motor is configured to drive a blower to generate an airflow. The motor controller includes a memory and a processor coupled thereto. The memory is configured to store a speed-to-airflow ratio associated with an airflow restriction on the blower. The processor is configured to receive a command for a calibrating airflow and operate the electric motor in a constant airflow mode to generate the calibrating airflow at a calibrating speed. The processor is further configured to write the calibrating speed and the calibrating airflow to the memory as the speed-to-airflow ratio.

    ANTENNA FOR COMMUNICATING WITH A MOTOR
    226.
    发明申请

    公开(公告)号:US20190149080A1

    公开(公告)日:2019-05-16

    申请号:US16227859

    申请日:2018-12-20

    Abstract: An electric machine includes a motor assembly including a motor controller including an NFC tuned circuit. The electric machine also includes a motor housing defining an interior space and enclosing the motor assembly within the interior space. The electric machine further includes an electric machine housing. The motor housing is enclosed within the electric machine housing. The electric machine also includes an NFC antenna mounted within the electric machine housing and configured to emit a magnetic field at a selected frequency. The magnetic field is configured to induce an electric current in the NFC tuned circuit. The electric machine further includes a memory configured to store information included in signals transmitted between the NFC antenna and the NFC tuned circuit via the magnetic field.

    CENTRIFUGAL BLOWER ASSEMBLY AND METHOD FOR ASSEMBLING THE SAME

    公开(公告)号:US20190072109A1

    公开(公告)日:2019-03-07

    申请号:US16122627

    申请日:2018-09-05

    Abstract: A centrifugal blower assembly comprises a scroll wall and a pair of opposing sidewalls. The scroll wall is positioned between the pair of opposing sidewalls such that the scroll wall and opposing sidewalls together define a blower chamber and a blower outlet. The blower outlet defines a blower outlet area. An adjustable outlet plate is pivotably coupled to the pair of opposing sidewalls such that the adjustable outlet plate is moveable between a first position to define a first blower outlet area and a second position to define a second blower outlet area.

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