Abstract: A method and apparatus for controlling commutation of a motor. A voltage is measured at each of a plurality of windings of a motor using an electric circuit. A controller computes an overall back electromotive force for the motor using the voltage measured at each winding in the plurality of windings. The controller generates a result having either a first value or a second value based on the overall back electromotive force. The controller adjusts the commutation phase and the commutation period of the motor using the result.

Abstract: An illustrative energy storage system includes an energy storage device, a processor coupled to the energy storage device, and a memory coupled to the processor. The memory is configured to store instructions adapted for execution by the processor to control and monitor operation of the energy storage device. The instructions are arranged into functional modules. Each functional module is associated with a memory cache in the memory. Control processes depending on the functional module read last known values from the associated memory cache. Reading last known values from the associated memory enables changes to the functional modules without shutting down the energy storage device.

Abstract: According to one embodiment, a semiconductor device includes external terminals supplied with the pair of voltage signals based on a detection result of a resolver through first and second input resistances, respectively, an operation amplifier configured to amplify a potential difference between the pair of the voltage signals supplied to the external terminals, a feedback resistance disposed between an output terminal of the operation amplifier and one of two input terminals thereof, switches disposed between the two input terminals of the operation amplifier and the external terminals, respectively, and a short-circuit failure detection circuit configured to detect whether or not a short-circuit failure has occurred in the resolver based on a voltage level of each of the external terminals in a state where the switches are in an off-state.

Abstract: Disclosed herein is a power apparatus including a first motor, a second motor connected with the first motor in parallel, a driver configured to supply driving currents to the first and second motors, a current detector configured to detect the driving current of the first motor and the driving current of the second motor, a speed calculator configured to calculate a rotating speed of the first motor and a rotating speed of the second motor, and a controller configured to control the driver based on the rotating speed of the first motor, wherein the controller controls the driver so that the rotating speed of the first motor and the rotating speed of the second motor are the same as each other, when the rotating speed of the first motor and the rotating speed of the second motor are different from each other.

Abstract: An estimation unit estimates a q-axis induced-voltage estimation value and estimation torque of a PM motor. An adder adds a torque command and a first command together. The first command is calculated at a first command generation unit based on the estimation torque. A further adder adds a q-axis voltage command and a second command together. The second command is calculated at a second command generation unit based on the q-axis induced-voltage estimation value. The first and second command generation units compensate a control delay in a current control system including a current control unit and an estimation delay in the estimation unit for the estimation torque and an estimation induced voltage of the PM motor, and thereby a lack of the q-axis voltage command in a high frequency range is compensated, reducing a torque ripple effectively over a wide range of speed up to a high speed range.

Abstract: A multi-stage power module is provided. The multi-stage power module may include at least one heat sink having a first surface, a second surface and an edge, a first set of switches disposed on the first surface of the heat sink, a second set of switches disposed on the second surface of the heat sink, a plurality of capacitors disposed adjacent to the edge of the heat sink, and a bus bar assembly symmetrically coupling the capacitors to each of the first set of switches and the second set of switches.

Abstract: A system and/or method for controlling a dual-three-phase machine with respect to a power electronics inverter is provided. The dual-three-phase machine includes six phase windings divided into at least two windings groups configured to provide a combination of six voltages that achieve zero common-mode voltage and a significantly reduced common-mode noise current.

Abstract: A method for controlling a motor includes detecting output signals output from three phases of a hall sensor, determining a failure of the hall sensor depending on the output signals, diagnosing which of the three phases of the hall sensor is out of order based on the output signals if it is determined that the hall sensor detections deviate from a predicted order, and outputting a virtual signal for the phase which is determined as a failure among the three phases of the hall sensor to a motor controller.

Abstract: A device, system and method for starting a single-phase induction motor. The method includes: i) energizing the start winding (50b) and continuously estimating an operating rotation (R1) of the motor throughout its operation; ii) measuring a first phase shift level (D1) between at least two electrical quantities along a first stability stage (E1); iii) monitoring the variation of the first phase shift level (D1) according to the increase of the operating rotation of the motor along the first stability stage; iv) detecting an inflection stage (Einf) from the first phase shift level to a second phase shift level (D2), when the operating rotation is close to a regime rotation (R2); v) measuring the second phase shift level (D2) between at least two electrical quantities of the motor along a first stability stage (E2); and vi) de-energizing the start winding when the operating rotation reaches the regime rotation.

Abstract: A motor control circuit includes a processor configured to calculate a plurality of motor impedances from measurements of an excitation voltage on a power bus to a motor and measurements of a plurality of currents through the motor resulting from the excitation voltage, and the processor configured to calculate individual winding inductances in the motor, based on the measured motor impedances, and configured to determine whether there is an inter-turn winding fault based on the calculated individual winding inductances.

Abstract: The invention discloses a real-time vibration state monitoring system. The system includes a linear motor, a signal generating module for driving the linear motor to vibrate, a working parameters feedback module, a calculating module, an initial position recording module, and a signal control module. The system can control the amplitude of the vibrator by monitoring the vibration state of the vibrator in the linear motor and adjusting the drive signal; therefore, the effect to normal working or reliability of the linear motor due to oversized amplitude can be avoided. A monitoring method is also provided.

Abstract: A drive, including an electric motor, which is supplied by a rectifier, the rectifier including a time-discrete closed-loop control structure, which regulates the stator current of the electric motor by setting the voltage applied at the motor, the current of the motor being acquired in time-discrete fashion, the closed-loop control structure including a first closed-loop controller whose setpoint is the output value of a first non-linear transfer member, and whose actual value is the output value of a second non-linear transfer member, the input value of the first non-linear transfer member being the setpoint of a first current component of the current, the input value of the second non-linear transfer member being the actual value of a first current component of the current.

Abstract: A servo actuator default disconnected ID setting method is performed by a servo actuator controlling system, which includes a plurality of servo actuators. A first message is broadcasted which indicates that an original ID is replaced with a non-default-disconnected to the plurality of servo actuators. The original ID of each actuator is replaced with the non-default-disconnected according to the first message. A second message is broadcasted which indicates that the non-default-disconnected ID is replaced with a default disconnected ID. And the non-default-disconnected ID of each servo actuator is replaced with the default disconnected ID according to the second message.

Abstract: This disclosure discloses a motor control device configured to control a motor. The motor control device includes an inverter part, a gate driving circuit, a PWM generation circuit, at least one gate buffer, and a control part. The inverter part is configured to convert direct current into alternate current in response to a motor drive command. The gate driving circuit is configured to drive the inverter part. The PWM generation circuit is configured to generate a PWM signal applied to the gate driving circuit. The at least one gate buffer is disposed between the gate driving circuit and the PWM generation circuit. The control part is configured to apply a test signal to the gate buffer to determine abnormality of the gate buffer.

Abstract: A motor control program transferring system includes: an upper control device including a memory storing motor control program(s) that are executable on motor control device(s) and circuitry which performs assigning operation(s) that assigns unique identification information to the motor control device(s) and transfers the motor control program(s) to the respective motor control device(s) to which the respective unique identification information has been assigned; motor control device(s) which communicates with the upper control device, the motor control device(s) each including a volatile memory, and a storage; and switching circuitry which enables communication between a first one of the motor control devices and the upper control device during initial state and switch on communication between a second one of the motor control devices and the upper control device after a respective unique identification information is assigned to the first motor control device.

Abstract: In a control device for an AC rotary machine that includes a first three-phase winding and a second three-phase winding having a phase difference, a voltage is applied to each phase of the first three-phase winding at an ON interval or an OFF interval equaling or exceeding a first predetermined value. When a first three-phase current is determined to be undetectable, a first voltage command is generated such that ON timings or OFF timings relating respectively to at least two phases of the voltage applied to the first three-phase winding are within a second predetermined value that is smaller than the first predetermined value, and when a second three-phase current is determined to be undetectable, a second voltage command is generated such that ON timings or OFF timings relating respectively to at least two phases of a voltage applied to the second three-phase winding are within the second predetermined value.

Abstract: An electric motor gives regenerative braking force to a hybrid vehicle by regenerative control. A regeneration level selector selects regenerative braking force of the electric motor by a driver's operation. When an ECO mode is applied, an ECU increases the regenerative braking force selected by the regeneration level selector as compared with the time when the ECO mode is not applied.

Abstract: A motor system includes a motor including two Hall sensors configured to output binary values, and a controller configured to control the motor. The two Hall sensors are placed 120 or 60 electrical degrees apart. The controller is operable to monitor output signals of the two Hall sensors and to determine a third Hall sensor output binary value. The controller is operable to fulfill the commanded requirements to operate in a servo system, by controlling commutation of a drive current into the motor, and by keeping track of the motor rotor position based on the third generated signal and the outputs of the two Hall sensors.

Abstract: A motor controller includes, in a microcomputer, a voltage fall determiner determining whether a reference voltage falls from a normal value based on an Analog-to-Digital (A/D) conversion value of a second voltage from an A/D converter, and a corrector (i) calculating a correction coefficient based on the A/D conversion value of the second voltage from the A/D converter and (ii) correcting an A/D conversion value of an input voltage that is output from the A/D converter. A core of the microcomputer generates a control signal based on an input voltage A/D conversion value, when the voltage fall determiner determines that the reference voltage is equal to or higher than a normal reference value. The motor controller keeps its motor control accuracy in such manner, even when a fall of an A/D conversion reference voltage is observed.

Abstract: An electric drive system for a three-phase PM electric machine. The drive system includes a split stator winding for each phase of the machine including a first winding section and a second winding section, and an inverter circuit including a pair of inverter switches for each phase, where the pair of inverter switches for each phase is electrically coupled to the first and second winding sections for that phase in the stator. The drive system also includes a switching system including a switch circuit, where the switch circuit includes a plurality of switch assemblies for switching between a full winding control mode and a half winding control mode, where each switch assembly includes a first AC switching device and a second AC switching device, and where each switch assembly is electrically coupled to the pair of inverter switches and the first and second winding sections for a particular phase.