Abstract: A method includes receiving an indication of a fault condition in a first winding set of a permanent magnet synchronous (PMS) electric machine that includes the first winding set and a second winding set. The method also includes, in response to receiving the indication of the fault condition, (i) controlling a first power converter that is configured to transfer power between the first winding set and an electrical bus to enter a standby mode, (ii) controlling a mechanical disconnect to disconnect an engine from the electric machine, and (iii) after the mechanical disconnect disconnects the engine from the electric machine, controlling a second power converter that is configured to transfer power between the second winding set and the electrical bus to apply a negative Q-current to the second winding set.

Abstract: A multiphase motor driving circuit includes: a power stage circuit; and a control circuit. In a motor braking mode, when a holding voltage is less than the first voltage threshold, a first sub-mode is entered, in which the control circuit controls at least a portion of switches in the power stage circuit with a pulse width modulation (PWM) signal to switch periodically, thereby converting a back electromotive force (EMF) of a multiphase motor into the holding voltage to supply power to the control circuit. In the motor braking mode, when the holding voltage is greater than the second voltage threshold, a second sub-mode is entered, in which the control circuit controls at least a portion of switches in the power stage circuit with the PWM signal to keep them continuously conductive, thereby consuming the back EMF of the multiphase motor to reduce a speed of the multiphase motor.

Abstract: A method for operating an electrical drive system includes the steps of: acquiring a number of input variables pertaining to the electrical drive system; determining at least one state variable from the acquired input variables by way of an observer; determining at least one disturbance variable from the acquired input variables by way of the observer; controlling the electrical drive system on the basis of the at least one determined state variable; and monitoring the state of the electrical drive system by machine learning, the at least one disturbance variable forming input data for a machine learning model.

Abstract: A method for operating a variable speed drive for driving an electric motor, in particular a synchronous motor, includes calculating a look-up table for a given motor, said look-up table having torque input values and flux input values referenced to current magnitude values and current angle values at the max torque per amp (MTPA) points and at increasing angular deviations from the MTPA points, wherein the current magnitude values and current angle values are out-put signals for controlling the motor; and outputting current magnitude values and current angle values as a function of torque input values and/or flux input values at the max torque per amp (MTPA) point to the motor as control variables, if the associated flux values are smaller than or equal to a flux limit; or outputting current magnitude values and current angle values as control variables, such that the associated flux values do not exceed a flux limit. The disclosure further discloses a variable speed drive for executing the method.

Abstract: A stand-alone motor unit for use with a piece of power equipment includes a housing and a flange coupled to the housing on a first side thereof. A plurality of apertures through the flange defines a first bolt pattern that matches an identical, second bolt pattern defined in the piece of power equipment. An electric motor has a power output of at least about 2760 W. The motor includes a stator having a nominal outer diameter of up to about 80 mm and a rotor supported for rotation within the stator. A power take-off shaft receives torque from the rotor and protrudes from one of the flange or a second side of the housing. A controller is positioned within the housing and electrically connected to the motor. A battery pack for powering the motor has battery cells having a nominal voltage of up to about 80 V.

Abstract: A motor control device that is connected to an angle sensor that outputs a sine wave signal and a cosine wave signal that change according to a magnetic pole position of a motor, and that calculates the magnetic pole position on the basis of the sine wave signal and the cosine wave signal output from the angle sensor to control the motor using the magnetic pole position, the motor control device including: a phase difference calculation unit that calculates a difference between phases of the sine wave signal and the cosine wave signal; and a phase change unit that changes and corrects the phases of the sine wave signal and the cosine wave signal, respectively, by the same amount so that the phase difference being corrected becomes 90 degrees in terms of an electrical angle on the basis of the phase difference calculated by the phase difference calculation unit.

Abstract: A forced discharge apparatus for a high-voltage component may include a component unit connected to a power supply unit through a connector. The forced discharge apparatus may also include a forced discharge circuit connected between the power supply unit and the component unit. The forced discharge apparatus may also include a control unit configured to discharge the component unit through the forced discharge circuit such that a voltage of the component unit becomes below a target voltage in response to a detection that a back electromotive force generated from the component unit when the connector is separated.

Abstract: A current detection device includes a first current calculation unit configured to calculate a first current value, a second current calculation unit configured to calculate a second current value, and a control current determination unit. The first current value is a current value obtained by converting a non-rated drive current into a digital value using a first resolution. The second current value is a current value obtained by converting a within-rating drive current into a digital value using a second resolution. The control current determination unit is configured to output the second current value as a value of a control current during a period in which the first current value is within a first threshold range, and output the first current value as the value of the control current during a period in which the first current value is outside the first threshold range.

Abstract: A gas engine replacement device includes a housing, a battery receptacle coupled to the housing to receive a battery pack, a motor within the housing, a power take-off shaft receiving torque from the motor and protruding from a side of the housing, a power switching network configured to provide power from the battery pack to the motor, and an electronic processor coupled to the power switching network and configured to control the power switching network to rotate the motor and to receive a command speed, determine whether the command speed is in an exclusion zone, set an output speed at the command speed responsive to the command speed being outside the exclusion zone, set the output speed to a speed outside the exclusion zone responsive to the command speed being in the exclusion zone, and control the power switching network to rotate the motor in accordance with the output speed.

Abstract: A load control device may control power delivered from a power source, such as an alternating-current (AC) power source, to at least two electrical loads, such as a lighting load and a motor load. The load control device may include multiple load control circuit, such as a dimmer circuit and a motor drive circuit, for controlling the power delivered to the lighting load and the motor load, respectively. The load control device may adjust the rotational speed of the motor load in a manner so as to minimize acoustic noise generated by the load control device and reduce the amount of time required to adjust the rotational speed of the motor load. The load control device may remain powered when one of the electrical loads (e.g., the lighting load) has been removed (e.g., electrically disconnected or uninstalled) and/or has failed in an open state (has “burnt out” or “blown out”).

Abstract: According to the present embodiment, a control device controlling a control target is provided which includes a first controller, a second controller, a detector, and a corrector. The first controller is configured to, by using a first measured value measured for the control target and a first command value that is a target value of the first measured value as inputs, generate a second command value. The second controller is configured to, by using a second measured value measured for the control target and the second command value as inputs, generate a target value supplied to the control target as a third command value. The detector is configured to detect a change in the second measured value and to change a control mode. The corrector is configured to generate a second correction value and correct the second controller in accordance with the control mode.

Abstract: A motor unit includes a housing, an electric motor arranged in the housing, a battery pack, a first plurality of holes defining a first hole pattern, a first power take-off shaft, a gearbox with a first gear train, and an external gearbox with a second gear train configured to receive torque from the first power take-off shaft. The external gearbox includes a second plurality of holes defining a second hole pattern, a second power take-off shaft receiving torque from the second gear train, and a third plurality of holes defining a third hole pattern that is identical to a fourth hole pattern on the piece of power equipment. When the external gearbox is coupled to the side of the housing and the piece of power equipment, the second power take-off shaft receives torque from the motor via the first gear train, first power take-off shaft, and second gear train.

Abstract: A slew rate controllable system for powering an electric machine. The system may include a plurality of power switches operable for converting a direct current (DC) input into an alternating current (AC) output suitable for electrically powering the electric machine. The system may include a gate drive system operable for controlling a slew rate associated with transitioning the switches between opened and closed states.

Abstract: An electric drive system includes a power electronics module with a DC-DC converter and an inverter. The power electronics modules include a plurality of Silicon Carbide switches. Dynamic models are used to estimate the temperatures of the switch junctions and of the Direct Bond Copper substrate. The dynamic models rely on a coolant flowrate value from a coolant system. If the estimate of the substrate temperature differs substantially from a measured substrate temperature, a controller concludes that the coolant system is not delivering the stated flow rate of coolant and takes remedial action such as reducing motor torque to zero.

Abstract: Systems, devices, and methods for providing water resistant and water proof encasements for remote receiver electrical components in ceiling fans. The remote receivers can include printed circuit board with electrical components mounted to a motor, and a printed circuit board with electrical components mounted in a ceiling canopy. All of the printed circuit board and electrical components, except for at least one lead wire are encased in the waterproof encasement. The water-resistant and waterproof encasements can include applications, such as shrink wrap, heat wrap, spray coating, dipping and putty forming the encasements. The encased receivers eliminate the need for plastic shell housing, reduces costs and allowing for the receiver components to fit into smaller spaces.

Abstract: Techniques and solutions are provided for controlling fans associated with battery racks located in an enclosure. The fans can be ranked according to different criteria, such as using an average temperature of cells in a battery rack, a temperature of an enclosure housing the battery racks, an average temperature of battery racks in the enclosure, or using information about the spread of cell temperature of cells in particular racks. Higher-ranked racks can have their fans turned to an active state. In some cases, different ranking techniques can be used for different operational modes of an HVAC unit in communication with the enclosure. Disclosed techniques can have various benefits, such as improving ventilation of the enclosure, prioritizing heating or cooling of particular racks, or reducing temperature gradients, or temperature spread, between battery racks in an enclosure.

Abstract: A motor control apparatus of a brake system and a control method are provided. The motor control apparatus of a brake system includes a motor coil unit disposed in the motor, an inverter configured to supply current to the motor coil unit, a current detector configured to detect motor current supplied to the motor coil unit, and a controller configured to adjust current supplied to the motor by estimating a temperature of the motor coil unit by receiving information detected by the current detector.

Abstract: A motor control device that controls a motor includes a calculator to calculate angle information related to a rotation angle of a rotor of the motor based on an output from a magnetic sensor, and a corrector to correct the angle information calculated by the calculator. The magnetic sensor is a sensor that includes a magnetoresistance effect element and outputs signals of two systems out of phase with each other by 180°. The corrector corrects the angle information using a correction amount expressed by a function including a current value of a motor current supplied to a stator of the motor and a phase angle of the motor current, a current value of a power source current supplied to the motor control device, and a mechanical angle of the rotor calculated based on an output from the magnetic sensor.

Abstract: An integrated monolithic H-bridge is formed in a bulk semiconductor region. A first branch includes a first vertical MOS transistor and a second lateral MOS transistor integrated in the bulk semiconductor region. The first vertical MOS transistor and the second lateral MOS transistor are coupled in series. A second branch includes a third vertical MOS transistor and a fourth lateral MOS transistor integrated in the bulk semiconductor region. The third vertical MOS transistor and the fourth lateral MOS transistor are coupled in series and the first and second branches being coupled in parallel.

Abstract: The present invention discloses a wide voltage adaptable drive and control circuit for hairdryers, which relates to the technical field of AC-DC conversion and comprises a main control-motor driver chip U2, a main power module, a voltage sampling module, and a rectification mode switching module. The voltage sampling module is used to detect a voltage of at least one node in the main power module and provide feedback to the main control-motor driver chip U2. The main control-motor driver chip U2 is used to drive the rectification mode switching module to run based on the voltage fed back by the voltage sampling module, and to switch a running mode of a bridge rectifier sub-module BR1 between a full-wave rectification mode and a voltage doubling rectification mode. The present invention primarily addresses the problem of providing a drive and control circuit for hairdryers with wide voltage adaptability.