Abstract: A direct-current superimposing circuit includes differential signal lines, capacitors, a common mode choke coil, a winding-type coil component, and a DC power supply which are disposed at a circuit board. The winding-type coil component includes a core, two pairs of terminal electrodes, and two windings (a first winding and a second winding). On the end surface of a flange portion, the terminal electrodes in one of the two pairs and the terminal electrodes in the other one of the two pairs are placed to face each other across the winding center of a winding core. The winding start and winding end of the first winding are connected to the terminal electrodes in one of the two pairs. The winding start and winding end of the second winding are connected to the terminal electrodes in the other one of the two pairs.

Abstract: A two-speed motor is mounted in a housing with an end cap. The end cap has a tubular structure defining an interior space, including an open first end connectable to the motor casing. The second end includes at least one planar surface and at least one air grate configured to permit airflow into and/or out of the interior space. A dual speed pump controller includes a motor controller for operating the dual speed motor. The controller includes an operating speed circuit for operating the motor in one of a first speed or a second speed, the first speed being greater than the second speed; an event circuit for operating the motor at the first speed before a predetermined event and operating the pump at the second speed after the predetermined event.

Abstract: The pinch detector is suitable to detect a pinch at a closing member actuated by a motor equipped with a measuring circuit to measure a motor current. It includes a first portion that, when the motor starts closing the member, obtains a reference value of the motor current measured at the end of a blind time period having a predetermined duration from the moment the motor starts to close the member; a second portion that compares current values of the measured motor current to a threshold value depending on said reference value, during a detection time period, following the blind time period and preceding a steady state time period of the motor, in order to detect a pinch at the closing member based on a comparison result.

Abstract: An encoder includes a scale and a sensor. The scale has first and second absolute patterns. The sensor includes a light source, and first and second absolute light receivers. The first and second absolute light receivers receive light from the first and second absolute patterns, respectively. The first absolute light receiver receives light from the first pattern and includes first and second light receiving elements. Each first light receiving elements outputs a first signal with a first phase. Each second light receiving elements outputs a first signal with a second phase. The first and second light receiving elements are arranged alternately. The second absolute light receiver includes third and fourth light receiving elements. Each third light receiving element outputs a second signal with the first phase. The third and fourth light receiving elements are arranged alternately. Each fourth light receiving element outputs a second signal with the second phase.

Abstract: In an electric power steering, a control unit includes a first power module configured to supply current to first motor windings, a first control board configured to output a control signal to the first power module, a second power module configured to supply current to second motor windings, a second control board configured to output a control signal to the second power module, and a heat sink. The heat sink includes a column portion having a plurality of mounting portions defined by flat surfaces parallel to the axial direction of the output shaft. The first control board and the second control board are each mounted along a corresponding one of one pair of opposing mounting portions, and the first power module and the second power module are each mounted along a corresponding one of another pair of opposing mounting portions.

Abstract: A method operates a steering device which comprises at least one electric motor that can be operated with an increased torque lying between a nominal torque of the electric motor and a maximum torque of the electric motor over an entire basic setting range. In at least one operating state, a threshold torque of the electric motor is at least temporarily limited to a reduced torque, in particular in comparison to the maximum torque, at least depending on at least one temperature characteristic variable.

Abstract: An object of the present invention is to provide a motor control device that can suppress electromagnetic noises including a switching noise and to an electric vehicle system using the motor control device. A motor control device includes: a power converter that is controlled by a pulse width modulation signal; a motor that is driven by the power converter; and a controller that generates the pulse width modulation signal, based on a carrier signal. When switching between a first carrier frequency (fc1) of the carrier signal and a second carrier frequency (fc2) of the carrier signal, the controller varies proportions of the first carrier frequency and the second carrier frequency in accordance with a number of rotations of the motor, the second carrier frequency being higher than the first carrier frequency.

Abstract: A current measurement apparatus includes: a current sensing element generating a signal according to a current to be measured; a current measurement means measuring an amount of the current to be measured from the signal outputted from the current sensing element; a communication unit receiving system information from at least one upper-level controller; a correction amount calculation unit calculating information on an amount of a corrected current based on the amount of the current to be measured and the system information; and a measurement operation unit outputting the information on the amount of the corrected current to the at least one upper-level controller.

Abstract: An apparatus and a method for detecting a phase delay of a resolver are provided. The apparatus includes a resolver configured to output a signal corresponding to a rotation angle of a motor, an excitation signal generator configured to generate an excitation signal using a square wave signal, and a controller configured to differentiate the signal to obtain a differential signal, detect a time when the differential signal meets a reference voltage as a peak time of the signal, and detect a phase delay time of the signal based on the peak time of the signal and an edge time of the square wave signal.

Abstract: An electromagnetic interference reducing circuit is provided. A first random number generator generates a plurality of first random number signals each having a plurality of triangular waves. Each of the triangular waves has a plurality of steps. The first random number generator generates a plurality of first random numbers and modulates each of the first random number signals according to the first random numbers. The first random number generator repeatedly counts, repeatedly removes, or does not count time of the steps of each of the triangular waves of each of the first random number signals according to one of the first random numbers. A first oscillator generates a first oscillating signal. A motor controller circuit controls a plurality of switch components of a motor respectively according to the first random number signals based on the first oscillating signal.

Abstract: An independent cart system includes an inductive link for contactless power transfer between a track and each mover as the mover travels along the track. A system for contactless data transmission between movers and a controller in the independent cart system includes a transmitter and/or receiver mounted on each mover and a complementary receiver and/or transmitter mounted on a track. The transmitter receives data to be transmitted across the inductive link and modulates a voltage present on either the primary or secondary winding to which it is coupled. The modulated voltage present on one winding induces a corresponding modulation on the voltage present on the other winding. A receiver operatively connected to the other side of the inductive link detects the modulated voltage and decodes the data from the modulated voltage received across the inductive link.

Abstract: The invention includes a first power supply connector, which connects a first inverter unit that supplies a drive current to a first three-phase winding of a rotary electric machine to a first vehicle power supply, and a second power supply connector, which connects a first second inverter unit that supplies a drive current to a second three-phase winding of the rotary electric machine to a second vehicle power supply, wherein a voltage of the first vehicle power supply is higher than a voltage of the second vehicle power supply, and a current capacity of the first power supply connector is smaller than a current capacity of the second power supply connector.

Abstract: A method for stabilizing a DC link voltage of an electrical converter, the method including: determining a DC link voltage signal for the DC link voltage of the electrical converter; determining a fluctuation signal of the DC link voltage by applying a high pass filter to the DC link voltage signal; determining a torque offset by multiplying the fluctuation signal with a gain value; and modifying a reference torque with the torque offset for controlling the electrical converter. The gain value is adjusted by: determining a DC link voltage ripple from the DC link voltage signal; and comparing the DC link voltage ripple with a threshold and, when the DC link voltage ripple is higher than the threshold, increasing the gain value.

Abstract: A short circuit detection system and method that identifies a short circuit between turns of a winding of a permanent magnet machine having a three-phase winding in response to detection of imbalances between the three motor phases at an instant in time. The imbalances are identified by monitoring motor terminal voltages and currents.

Abstract: An electric drive system includes a rechargeable energy storage unit, a power inverter, an electric motor and a controller having a processor and tangible, non-transitory memory on which instructions are recorded. A transfer of electrical power between the rechargeable energy storage unit and the electric motor is governed by a pulse width modulation (PWM) switching frequency. The controller is configured to determine a current switching frequency based in part on a PWM type, a PWM switching frequency style and an inverter direct current voltage. A PWM scalar is determined based in part on the current switching frequency and a maximum value of a control reference frequency. The controller is configured to transmit a command signal to regulate the transfer of electrical power based in part on the PWM scalar, the PWM switching frequency being proportional to a product of the PWM scalar and the control reference frequency.

Abstract: A power conversion system includes an inverter and a controller configured to: responsive to startup of the system, measure a motor speed of the IPM motor; responsive to the motor speed being less than a threshold, generate the inverter switching control signals to perform high frequency injection (HFI); during the HFI, determine a measured angle of the IPM motor; during the HFI, generate the inverter switching control signals to provide an injected current to the IPM motor; detect acceleration or deceleration of the IPM motor responsive to the injected current; selectively determine an electrical angle as half the measured angle or as 180 degrees plus half the measured angle based on the detected acceleration or deceleration of the IPM motor; and responsive to determining the electrical angle, generate the inverter switching control signals to drive the IPM motor to a reference frequency in a normal operating mode of the inverter.

Abstract: A method for controller a multiphase electric machine includes, in response to a determination that a phase of the multiphase electric machine is in an open circuit condition, determining a desired torque to be generated by the multiphase electric machine and retrieving, based on the determination that the phase is in the open circuit condition and the desired torque, a set of current values to be applied to each of the other phases of the multiphase electric machine to achieve the desired torque. The method may also include applying respective current values of the set of current values to corresponding ones of the other phases of the multiphase electric machine, the set of current values being determined based on a model of the multiphase electric machine that includes the phase is in the open circuit condition.

Abstract: A gate voltage control/gate resistance changing circuit (21) is accommodated in the same package (P1) as a switching element (11), and outputs a driving signal to the switching element (11) to control turning on and off of the switching element (11). When an external signal is input from outside of the package (P1) to a terminal (3c) of the package (P1), a changing unit (221) accommodated in the package (P1) changes the switching speed of the switching element (11) based on the signal.

Abstract: This power conversion device includes: a current detection unit for detecting current flowing through a rotary electric machine; a switching pattern determination unit for determining a switching pattern on the basis of the detected current, a current prediction value, a current command value, and a current harmonic command value; and a power conversion unit for outputting AC power to the rotary electric machine in accordance with the switching pattern, wherein the switching pattern determination unit determines the switching pattern so that the current value follows the current command value and the current harmonic becomes equal to or smaller than a limit value.

Abstract: A motor control apparatus includes a main CPU configured to output a position command value, a plurality of integrated circuits connected to the main CPU and provided depending on the number of a plurality of motors, and a plurality of sub-CPUs connected to the plurality of corresponding respective integrated circuits, wherein each of the plurality of integrated circuits includes a motor interface control unit that outputs a drive command value to an amplifier that drives each of the motors in such a way as to move the motor to a position of the position command value. Each of the plurality of sub-CPUs controls an output of the drive command value by the motor interface control unit in the integrated circuit connected to the sub-CPU, based on the position command value and a position feedback value of the motor being read via the integrated circuit connected to the sub-CPU.