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: A compact motor control system for selectively controlling power from a power source to a load includes a motor switching assembly having a solid state contactor with a plurality of solid state switches. The motor switching assembly also includes at least one direct current (DC) link coupled to the solid state contactor and redundant first and second inverters coupled to the at least one DC link. The motor switching assembly further includes a first relay coupled between the solid state contactor and an input of the inverter and a second relay coupled between the solid state contactor and an input of the second inverter. In addition, the motor control system includes a control system programmed to control the motor switching assembly to selectively supply power to the load from the power source.

Abstract: A motor control system includes a motor switching assembly comprising a power converter positioned on a converter path, a first relay positioned on the converter path upstream of the power converter, a second relay positioned on a bypass path that is in parallel with the converter path, and a solid-state switching unit positioned upstream from the converter path and the bypass path. The motor control system also includes a control system that controls operation of the motor switching assembly, with the control system programmed to operate the solid-state switching unit in one of a conducting mode, a non-conducting mode, and a ramping mode, so as to selectively control and condition power flow therethrough. The control system is also programmed to control switching of the first and second relays between open and closed positions to selectively route power along the converter path or the bypass path.

Abstract: A vehicle includes an electric machine, an IGBT, and a gate driver. The IGBT has a gate, an emitter, and a collector and is configured to flow an electric charge through a phase of the electric machine. The gate driver is configured to flow current onto the gate at a first level, and in response to a time integral of a voltage across the phase exceeding a predetermined level, transition from the first level to a second level less than the first level.

Abstract: [Problem] An object of the present invention is to provide a vector control type motor control unit that compensates a dead time of an inverter without a tuning operation, improves a distortion of a current waveform and responsibility of the current control, and suppresses sound, vibration and a torque ripple.

Abstract: A motor control unit that vector-controls a 3-phase brushless motor based on a d-axis voltage command value and a q-axis voltage command value via an inverter with feedback-controlling, comprises: a central processing unit which comprises: a dq-axes dead time compensating section to calculate dq-axes dead time compensation values of the inverter and perform a dead time compensation; and a dq-axes disturbance estimating observer to input a d-axis current command value, a q-axis current command value, a motor rotational number, a motor angular velocity, a d-axis feedback current, a q-axis feedback current, the d-axis voltage command value and the q-axis voltage command value and calculate a d-axis disturbance compensation value and a q-axis disturbance compensation value, which cannot be compensated by the dead time compensation, by respectively adding the d-axis disturbance compensation value and the q-axis disturbance compensation value to the d-axis voltage command value and the q-axis voltage command value.

Abstract: A method of controlling an electric vehicle, wherein the electric vehicle comprises an electric motor, a controller, and an inverter, wherein the controller receives a control signal with an instruction to operate the electric motor. In one embodiment, the method includes collecting an operational data set on a plurality of output signals of the inverter and a rotation angle of the electric motor. In one embodiment, the method includes computing a voltage change of the inverter and a magnetic flux of the electric motor based on a predetermined data set and the operational data set. In one embodiment, the method includes adjusting an output of the inverter to offset the voltage change and the magnetic flux, the output being provided to the electric motor to control the electric motor in accordance with the instruction.

Abstract: A method for moving a stage includes coupling a stage mover to the stage, and directing current to the stage mover with a control system. The stage mover includes a magnet array and a conductor array positioned adjacent to the magnet array. The conductor array includes a first layer of coils and a second layer of coils, with the first layer of coils being closer to the magnet array than the second layer of coils. The control system directs current to the first layer of coils and the second layer of coils independently. Further, the control system directs more current to the first layer of coils than the second layer of coils during a movement step to reduce the power consumption.

Abstract: A voltage supplier in one aspect of the present disclosure includes a first voltage generator, a second voltage generator, a first switcher, a second switcher, a first booster, and a second booster. The first booster boosts a voltage lower than a first switching drive voltage to thereby generate the first switching drive voltage, and supplies the first switching drive voltage to the first switcher on a first supply path. The second booster boosts a voltage lower than a second switching drive voltage to thereby generate the second switching drive voltage, and supplies the second switching drive voltage to the second switcher on a second supply path.

Abstract: In a dual-inverter type of motor control apparatus which controls a synchronous motor having two or more open-end armature windings corresponding to respective phases, first and second inverter control circuits control the motor by supplying voltage commands to corresponding ones of the two inverters, with a combination of respective control methods executed by the inverter control circuits for generating the voltage commands being determined such as to provide a high speed of control response, while preventing control interference caused by effects of component characteristic disparities, such as deviations between timings of updating the voltage commands by the two inverter control circuits.

Abstract: In the present electric driving apparatus, coils that constitute a first armature winding and coils that constitute a second armature winding are arranged so as to alternate in a circumferential direction, and a control portion is configured so as to perform single-system driving when one of a first system and a second system fails, the single-system driving stopping driving of an inverter of the system that has failed, and controlling driving of the inverter of the system that has not failed to supply inverter phase currents to an armature winding of the system that has not failed such that the inverter phase currents are set to a second upper limit value that is greater than a first upper limit value.

Abstract: The invention relates to the discharging of a DC link capacitor in an inverter arrangement, thereby allowing, for example, a DC link capacitor to be discharged while an electric machine that is connected to the inverters can operate in an idling mode as a safe mode. The DC link capacitor is discharged by very briefly triggering a semiconductor switch within the inverter. According to the invention, the inverter bridge arm with the smallest phase voltage is selected for the very brief triggering process.

Abstract: An inverter power generator includes an engine, an actuator that adjusts the position of a throttle valve of the engine, a power generator that generates AC power from a driving force of the engine, a converter that converts the AC power outputted from the power generator into DC power, an inverter that converts the DC power outputted from the converter into AC power, a current detector that detects the current of the AC power outputted from the inverter, a voltage detector that detects the voltage of the AC power outputted from the inverter, a target rotation speed determiner that determines a target rotation speed of the engine based on a detected current value and a correction value based on the difference between a target voltage value and the detected voltage value, and an actuator controller that controls the actuator based on the determined target rotation speed.

Abstract: An auxiliary power supply device includes a parasitic diode forming a parallel circuit together with a second switching element and connected in a forward direction to a main power supply, and a parasitic diode forming a parallel circuit together with a fourth switching element and connected in a reverse direction to an auxiliary power supply. When a state parameter indicates that a reaction force that interferes with operation of an assist motor is applied, an electronic control unit turns ON a first switching element, turns OFF the second switching element, turns ON a third switching element, and turns OFF the fourth switching element. A regenerative current from the assist motor flows to the auxiliary power supply via an inverter, the third switching element, and the parasitic diode.

Abstract: An over-current protection circuit for a motor capable of selecting one of a plurality of connection states has a plurality of decision circuits, a combining circuit, and a nullifying circuit. The combining circuit combines results of the comparisons in the plurality of decision circuits. The nullifying circuit nullifies part of the comparisons in the plurality of decision circuits. The number of outputs of the over-current protection circuit is one, so that for controlling the driving and stopping of the inverter needs just one terminal is required for receiving the output of the combining circuit. Moreover, because the over-current protection circuit is formed of hardware, the protection can be performed at a high speed.

Abstract: An apparatus for controlling a multi-winding motor may include: a current detector configured to detect currents of a plurality of windings, each of the windings associated with a corresponding rotor; an abnormal determiner configured to determine abnormality of at least one of the plurality of windings on the basis of the currents of the plurality of windings; a compensation calculation unit configured to calculate a current phase offset and/or compensation current of each of the plurality of windings according to the determined abnormality; and a signal output unit configured to output control signals to control at least one of the plurality of windings according to the current phase offset and/or the compensation current.

Abstract: An electric drive system includes a battery pack, a power inverter module (“PIM”), an electric machine, a switching circuit, and a controller. The electric machine has three or more phase legs. The PIM has a DC-side connected to the battery pack, and an alternating current (“AC”)-side connected to the electric machine. The switching circuit includes AC switches, and for each phase leg also includes three or more winding sections each electrically connectable to or disconnectable from the battery pack and PIM via the AC switches. The controller commands a binary switching state of each respective AC switch based on the rotary speed to implement one of three different speed-based operating modes of the electric machine, and to thereby vary a conductive path from the PIM to the electric machine through one or more of the connected winding sections.

Abstract: Provided is a linear compressor capable of reducing noise and manufacturing cost. The linear compressor includes a piston reciprocating within a cylinder, a motor providing a driving force for movement of the piston, a sensing unit sensing a motor voltage and a motor current related to the motor, a discharge part installed at one end of the cylinder and adjusting discharge of a refrigerant compressed within the cylinder, and a controller detecting a load variation of the motor using at least one of the motor voltage and the motor current, calculating a compensation value related to a position of the piston each time a load variation of the motor is detected, and detecting an absolute position of the piston using the calculated compensation value.

Abstract: The invention relates to a method for operating a multiphase electrical machine (2) in the event of a fault, wherein the electrical machine (2) is driven with the aid of a driver circuit (3), wherein the driver circuit (3) has half-bridge circuits (31), each associated with a phase (U, V, W), and bridge paths (32) for connecting or disconnecting predetermined voltage potentials to/from the respective phases (U, V, W) of the electrical machine (2), wherein one or more of the bridge paths (32) are operated according to a first fault operating mode if a fault is detected, wherein, in the first fault operating mode, the one or more bridge paths (32) are controlled in such a manner that said paths connect a first of the predetermined voltage potentials to the phase (U, V, W) via a predetermined electrical resistor.

Abstract: An example apparatus includes a controller operatively coupled to an electric actuator via a network. The controller is configured to obtain torque curve data over the network from the electric actuator, the torque curve data being associated with actuation of an electric motor of the electric actuator, the actuation to cause a flow control member of a motor-operated valve to move, the flow control member being mechanically coupled to the electric motor and being movable between an open position and a closed position. The controller is configured to determine an area under a torque curve based on the torque curve data, determine a variance between the area under the torque curve and an area under a reference curve, and generate a first control signal indicating that the electric actuator is healthy when it is determined that the variance does not exceed the variance threshold.