Abstract:
A motor controller is provided that includes an inverter configured to drive an electric motor, a rectifier configured to rectify an alternating current (AC) input current and to output the rectified AC input current to the inverter, and a controller coupled to the inverter. The controller is configured to improve a power factor of the motor controller by controlling the AC input current based on a direct current (DC) link voltage measurement.
Abstract:
A method of controlling a liquid movement system, such as a pool system. The method includes receiving a maximum time that an auxiliary load is to operate, receiving a minimum pump speed of a pump system that pumps a liquid through the auxiliary load, monitoring the time that an auxiliary load has been in operation, monitoring the pump speed of a pump system that pumps a liquid through the auxiliary load, and deactivating the auxiliary load if the maximum time or minimum pump speed has been met. Also disclosed are a pool system and a controller for controlling the pool system.
Abstract:
A motor controller coupled to a motor for a pump is described. The motor controller is configured to determine a first mode of operation for the motor, based on at least one of a predefined schedule stored by the motor controller and an input signal received by the motor controller from at least one ancillary device. The motor controller is additionally configured to transmit a first control signal to the motor to operate the motor in the first mode, and to transmit a second control signal to change an operation of the at least one ancillary device, wherein the at least one ancillary device includes one or more of a heater, a chlorine generator, and an ozone generator.
Abstract:
A bearing assembly for rotatably supporting a shaft member. The bearing assembly has an inner ring having an inner surface sized to receive the shaft member therein. A first fastener threadedly engages a first fastener aperture formed in the inner ring such that a distal end of the first fastener engages the shaft member to selectively retain the inner ring to the shaft member for rotation therewith. A first groove extends along the inner surface of the inner ring and is aligned with the first fastener aperture formed in the inner ring. The first groove is sized to permit clearance between a burr or other obstruction formed on an exterior surface of the shaft member.
Abstract:
A blower assembly includes a housing including an outlet and a cutoff point positioned proximate the outlet. The blower assembly also includes an impeller including a plurality of blades that each includes a tip portion including a radially outer edge and a transition point that divides the radially outer edge into a first portion and a second portion. The impeller is positioned within the housing such that a first radial gap is defined between the cutoff point and the first portion and a second radial gap is defined between the cutoff point and the second portion. The first radial gap includes a constant width that is shorter than a width of the second radial gap.
Abstract:
A motor controller coupled to a motor is described. The motor controller includes a wireless communication device and a computing device coupled to the wireless communication device. The computing device is configured to communicatively couple with a client computing device using the wireless communication device, wirelessly receive at least one setting from the client computing device, and operate the motor pursuant to the at least one setting, to move liquid in an aquatic environment.
Abstract:
A system and method of controlling an electric motor using a motor drive controller are provided. The motor drive controller includes a rectifier configured to convert an AC input voltage to a DC voltage, a DC bus electrically coupled to the rectifier, an inverter electrically coupled to the DC bus and configured to generate an AC voltage to drive the electric motor, and a control unit. The control unit includes a sign calculation module configured to determine a polarity of each phase of a reference current command and a compensation module configured to generate a voltage compensation command signal using one of the determined polarities of the reference current command and a measured current, and one of a measurement of DC bus voltage and a constant DC bus voltage value, the voltage compensation signal compensating the drive controller to neutralize a deadtime effect.
Abstract:
A motor controller including a communication port and a computing device coupled to the communication port is described. The computing device is capable of communicating using a plurality of communication protocols and is configured to detect that an external device has connected to the communication port. The computing device is further configured to identify a first communication protocol used by the external device, wherein the first communication protocol is one of the plurality of communication protocols, and communicate with the external device using the first communication protocol.
Abstract:
Methods and systems for starting an electric motor using a motor controller including a processor are provided. The method includes determining if the electric motor is operating, increasing a failed start counter if the electric motor is determined not to be operating, determining a reverse rotation by comparing a failed start counter to a predetermined threshold, and applying a reverse rotation start routine to the electric motor when a reverse rotation is determined.
Abstract:
Systems and methods of detecting a failure of a permanent magnet synchronous motor system. A current of each phase coil of the motor is monitored. A value indicative of the power of the motor is compared to a threshold value indicative of power during a low power detection period. If the value indicative of the power fails to exceed the threshold value indicative of power for the entire low-power detection period, the system indicates a first error condition. The method also monitors the speed of the motor and indicates a second error condition if the speed of the motor remains below a speed threshold for an entire speed failure detection period. A third error condition is indicated if the current of at least one phase of the motor remains below a phase current threshold for an entire loss of phase detection period.