Abstract: A trans inductor having a powdery magnetic substance and a power converter using the trans inductor are provided. The trans inductor and the power converter reduce peak current flowing in an inverter power module (IGBT), improve inverter efficiency, reduce output RMS current (output effective current) and reduce capacitor consumption by applying a material with properties that are resistant against current saturation instead of a core material of a conventional trans inductor employed in a power converter. Accordingly, an inductance decreasing rate due to core saturation when high current is generated is improved and current flowing in a switch device is prevented from being abruptly increased.

Abstract: A cooling fan control system is provided. The system includes a sensor unit that includes a temperature sensor that generates a first output value corresponding to a coolant temperature and an air-conditioner pressure transducer that generates a second output value corresponding to an air-conditioner pressure and a cooling control portion. The cooling control portion generates a control condition based on the first output value and the second output value and adjusts a rotation speed of a cooling motor based on the control condition. The control condition includes a target control condition formed as a region including a cross point of the first output value and the second output value. The cooling control portion adjusts the rotation speed of the cooling motor to cause the first output value and the second output value to correspond to the target control condition.

Abstract: In accordance with one embodiment, a voltage control apparatus comprises a pulse width control section, a pulse width modulation wave generation section, a variable amplifier control section and a variable amplifier. The pulse width control section specifies the pulse width of the pulse width modulation wave. The pulse width modulation wave generation section generates a pulse width modulation wave having the pulse width specified by the pulse width control section. The variable amplifier control section generates a GAIN signal for scaling up/down the pulse width modulation wave generated by the pulse width modulation wave generation section. The variable amplifier scales up/down the pulse width modulation wave generated by the pulse width modulation wave generation section according to the GAIN signal generated by the variable amplifier control section and outputs the scaled up/down the pulse width modulation wave.

Abstract: A method and system for controlling a switching frequency of a vehicle are provided. The method includes monitoring, by a controller of the vehicle, a temperature of a motor, a temperature of a coolant, and a quantity of a coolant when a vehicle engine is turned on. Additionally a switching frequency of an inverter is adjusted based on the monitored temperature of the motor, the monitored temperature of the coolant, and the monitored quantity of the coolant.

Abstract: The present disclosure relates to actuators. The teachings thereof may be embodied in an actuator drive for a flap or for a valve for setting a gaseous or liquid volume flow, for example in the heating, ventilation, and/or air conditioning of a building, for a DC motor with a reduction gear connected downstream and a gearbox-side output. The actuator may include: a motor control unit and a voltage supply unit. The motor may be a brushless two-phase DC motor with a stator comprising a quadruple T armature, each armature comprising an armature coil and a radially outward-lying rotor mounted to rotate relative to the stator. Each armature may have precisely four alternating permanent magnetic poles uniformly distributed. The rotor is connected to a spring applying a restoring force to the rotor if the rotor is deflected from a rest position.

Abstract: A rotating electric machine control device includes a first system controller and a second system controller, an overheat protection controller and an abnormality detector. The overheat protection controller includes a temperature estimator and a restricted current calculator. The temperature estimator estimates system temperatures as well as other temperature, including a shared component temperature of a shared component that is connected to both of plural systems in a shared manner. The restricted current calculator calculates restricted current values, based on the system temperatures and the shared component temperature. At least one of the system temperatures, the shared component temperature, and/or the restricted current values is changed from an all-systems normal time, when at least one of a plurality of systems is abnormal.

Abstract: A method of preventing a windshield wiper from freezing to a windshield of a vehicle is provided. The method broadly includes the steps of: (a) receiving information relating to an ambient condition of the vehicle; (b) switching power to a motor for driving the windshield wiper in a first direction if the received information indicates an adverse ambient condition of the vehicle; (c) sensing current drawn by the motor; (d) comparing an initial sensed current drawn by the motor when power is initially switched to the motor to a subsequent sensed current drawn by the motor a period after power is initially switched to the motor; and (e) periodically reversing the motor for driving the windshield wiper in a second direction or the first direction until the subsequent sensed current is less than the initial sensed current.

Abstract: Disclosed examples include power conversion systems, methods and computer readable mediums to operate an inverter to drive a motor load through an output filter, in which a control output value is computed according to a current reference value and a current feedback value using a proportional-integral (PI) current regulator, the control output value is filtered using a lag compensator filter to compute an inverter output command value, and the inverter is controlled according to the inverter output command value.

Abstract: The invention provides a monitor circuit, which is used for a fan and receives a driving current and a driving voltage of the fan. The monitor circuit includes sensing circuits and a microcontroller. The sensing circuits respectively sense statuses of the fan and output sensing values. The microcontroller is used for monitoring whether the sensing values exceed preset value ranges respectively to obtain comparison results. The microcontroller outputs warning signals according to the comparison results. Each of the warning signals has a specific frequency.

Abstract: A control apparatus for an AC motor includes an inverter, a voltage-command calculation unit calculating a vector used for giving a command to the inverter, a voltage-waveform specifying unit specifying, as a voltage waveform for operating the inverter based on the vector, a pulse pattern selected from previously stored voltage waveforms, or a voltage waveform of a PWM signal generated by a comparison between a phase voltage and a carrier wave, an amplitude-spectrum extraction unit obtaining a bus current of the inverter to extract an amplitude spectrum of a specific frequency corresponding to a resonance frequency of a circuit through which the bus current flows, and a voltage-amplitude limiting unit limiting an amplitude of the vector so that the amplitude spectrum of the specific frequency becomes less than a threshold, if the amplitude spectrum of the specific frequency correlating with the voltage waveform is the threshold or more.

Abstract: A method for the noise modulation of a three-phase synchronous electric motor driven using a vector regulation by means of a motor control unit. Actual values for the rotated current components id and iq may be obtained in an open-loop control system, where id corresponds to the magnetization current and iq corresponds to the torque-forming current of the synchronous motor. The actual values may be compared with predetermined reference target values, and the differences between the actual values and the reference target values may be converted into control variables to regulate the actual values (iq, id) to the reference target values. The magnetization current-forming current component (id) may be adapted using an acoustic controller to a desired acoustic state depending on an acoustic state that was measured by a measuring device and was transmitted to the motor control unit.

Abstract: A motor case (10) has connectors (30) fixed at motor case mounting holes (11), and an inverter case (50) has connectors (60) radially movable at inverter case mounting holes (65). The inverter case (50) is mounted on the motor case (10) so that the connectors (30, 60) fit together. A surface seal (45) is disposed on a lower surface of a flange (42) at an outer periphery of a housing (35) of the motor-side connectors (30), and is compressed elastically against an upper surface of the motor case (10) at an outer periphery of the motor case mounting holes (11). A metal pressing member (20) is fixed on the motor case (10) and presses the flange (42). An axial seal (47) is fit on the outer periphery of the housing (35) and is compressed elastically between the outer periphery and an inner periphery of the second mounting hole (65).

Abstract: A motor control apparatus that vector-controls a sensorless motor includes an estimating unit configured to obtain an estimated phase value by estimating a phase of a rotor in the sensorless motor, and a generating unit configured to generate, from the estimated phase value and a phase command value of the rotor, a phase conversion value that is used for a coordinate conversion between a rotary coordinate system and a static coordinate system in the vector control. The generating unit is further configured to output the phase command value as the phase conversion value when the rotor is caused to start to rotate, and change the phase conversion value so that the phase conversion value approaches the estimated phase value from a predetermined timing after the rotor is caused to start to rotate.

Abstract: A drive circuit includes a control circuit configured to output a polarity signal for controlling ON/OFF of a driving switch, a pulse transformer, electrically connected to the control circuit, configured to transmit the polarity signal, and a discharge circuit, electrically connected to the pulse transformer and a gate terminal of the driving switch, configured to discharge an electric charge accumulated in the gate terminal based on the polarity signal. When the polarity signal having a first polarity is applied to the gate terminal through the pulse transformer, the driving switch is switched to and maintained in an ON state by accumulating the electric charge in the gate terminal. When the polarity signal having a second polarity different from the first polarity is applied to the discharge circuit through the pulse transformer, the driving switch is switched to an OFF state by discharging the electric charge by the discharge circuit.

Abstract: A drive device comprising at least one control unit (10) for operating a first drive unit (16) with a first operating frequency (fb1) from a first operating frequency interval and a second drive unit (18) with a second operating frequency (fb2) from a second operating frequency interval, which at least partly overlaps the first operating frequency interval. The control unit (10), in at least one operating state, operates the drive units at least occasionally simultaneously with different operating frequencies (fb1, fb2) and varies the first operating frequency (fb1) and/or the second operating frequency (fb2) within the respective operating frequency interval.

Abstract: A dual-drive electric motor control system configured to drive a first electric motor and a second electric motor is provided. The system includes a shared front-end motor drive circuit for converting AC input voltage from an AC voltage source to a DC-link voltage. A first control system has a first inverter coupled to the shared front-end motor drive circuit, and a first switch device configured to couple the AC voltage source directly to the first electric motor. The system further includes a second control system having a second inverter coupled to the shared front-end motor drive circuit, and a second switch device configured to couple the AC voltage source directly to the second electric motor.

Abstract: Systems and apparatus relating to motor control (e.g., for thermal transfer printing) include, according to at least one implementation, a motor control system including: a position controller to receive a demanded position (PD) input for controlling a motor; a torque controller coupled with the position controller, the torque controller to receive a torque bias (TB) input for controlling the motor; and a feedback circuit coupled with the torque controller and the position controller; wherein the feedback circuit is configured and arranged to combine an output from the position controller, the output being generated based on the demanded position (PD) input, with the torque bias (TB) input to generate a torque demand (TD) input to the torque controller.

Abstract: The system has a converter for converting an AC current into a DC current, an inverter for inverting the DC power supplied from the converter into an AC power, a servo control device for controlling a drive of a servo motor, and a resistance regenerating circuit for consuming a regenerative energy. The servo control device has a plurality of motor control portions for enabling a plurality of servo motors to be controlled and a plurality of control port portions corresponding to a plurality of motor control portions. At least one of the plurality of motor control portions is configured so that a power supply regenerating control function portion and a control function portion for the servo motor can be switched. The robot control system capable of suppressing the increase of the development cost and adding the power supply regenerating function can be provided.

Abstract: The present disclosure relates to an inverter, and more specifically to an inverter that can be restarted stably by determining whether to restart it when power is supplied after a failure has occurred in the inverter due to a fault in the main supply.

Abstract: A parallel platform tracking control apparatus and method using a visual device as a sensor are disclosed. The apparatus comprises a parallel platform body, a CCD camera (11), a lens (6), a camera light source (9), a computer (11), a Dspace semi-physical simulation controller, an ultrasonic motor driver and the like. The parallel platform comprises an ultrasonic linear motor (1), a linear grating encoder (5), a driven rod (2), a moving platform (3), a stationary platform (4) and the like. The CCD camera photographs the moving platform in a perpendicular and opposite manner, and the photographed images are subjected to an image processing algorithm to measure the position of the corresponding marker on the moving platform, which is not only applicable to measurement, but also implements real-time feedback of the termination position of the moving platform, such that a full closed-loop system is constituted. In this way, the parallel platform is precisely positioned.