Abstract: A motor drive control device capable of driving a motor at high efficiency is provided. A control unit (3) of a motor drive control device (1) outputs a control signal to a motor drive unit (2) to control operation of an inverter circuit (21) for energizing a motor (7). The control unit (3) detects an actual rotational speed of the motor (7), detects a power-supply voltage, detects a magnitude of current flowing in the motor (7), and calculates a magnitude of driving torque of the motor (7) based on detection results. The control unit (3) compares a reference rotational speed obtained based on the calculated magnitude of the driving torque of the motor (7) and the actual rotational speed of the motor (7), and determines an advance angle value based on a comparison result. The control unit (3) outputs the control signal based on the determined advance angle value.

Abstract: Controlling a DC-AC inverter of an electric machine, where the electric machine comprises a resonant main exciter having rotary transformer. A voltage level of DC power received at a DC-AC inverter is monitored and the frequency of AC power generated by the DC-AC inverter and supplied to the rotary transformer is controlled based at least in part on the voltage level of the DC power.

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 defrost method for a heat pump system includes running the heat pump system in a heating mode to provide heat to an enclosed space and determining if an outdoor temperature is less than an outdoor threshold temperature. Responsive to a determination that the outdoor temperature is below the outdoor threshold temperature, determining if a calibration state has been previously run. Responsive to a determination that the calibration state has not been previously run, running the heat pump system in the calibration state. Responsive to a determination that the calibration state has been previously run, determining if a temperature difference between a temperature of an evaporator coil of the heat pump system and the outdoor temperature exceeds a temperature threshold value. Responsive to a determination that the temperature difference between the evaporator coil and the outdoor temperature is greater than the temperature threshold value, running the heat pump system in a defrost state.

Abstract: Fastening construction, in particular for an exterior vision unit of a motor vehicle, comprising a base part which can be fixedly connected with a vehicle, and a rotation part which is couplable with the base part and which in coupled condition forms a central shaft for pivotally bearing-mounting a housing of an exterior vision unit. The base part and the rotation part are provided with at least one cam and groove pair cooperating as a bayonet catch, such that in a first angular position of the rotation part with respect to the base part, the rotation part for the purpose of coupling can be displaced along a geometric axis to the base part to align the cam and groove pair for cooperation and the rotation part is pivotable about the geometric axis from the first angular position to a second angular position in which the cam and groove pair cooperate.

Abstract: A brushless motor capable of accurately detecting magnetism and securing rigidity of a center piece is provided. A brushless motor (10) includes; a stator (12); a rotor (14) having a rotor magnet (22) arranged radially outward of the stator (12); a metal center piece (18) that has a plate-like portion (38) disposed opposing the stator (12) at one side in an axial direction of the stator (12), and holds the stator (12); a control board (42) disposed at an opposite side from the stator (12) with respect to the plate-like portion (38), and provided with a magnetic detection sensor (46); a magnetic induction member (68) extending from a side of the rotor magnet (22) to a side of the magnetic detection sensor (46); and a resin-made connector member (44) that holds a connector terminal (62) connected to the control board (42), holds the magnetic induction member (68), and is fixed to the center piece (18).

Abstract: Example power factor correction circuits to correct the power factor of power converters are disclosed. An example power factor correction controller circuit includes a phase locked loop phase angle determiner to determine a first phase angle of an input voltage of the power converter and further includes a compensating current determiner to determine, based on the phase angle, a compensating current to compensate for a capacitive current introduced by at least one filter capacitor of the power converter. The power factor correction controller circuit further includes a switch controller to cause a controlled current drawn by a power stage of the power converter to be adjusted by the compensating current to reduce a phase offset between the first phase angle of the input voltage and a second phase angle of the an input current drawn at an input of the power converter.

Abstract: Embodiments of the present disclosure pertain to network based machine learning generated simulations. In one embodiment, the present disclosure includes a computer implemented method comprising sending first code comprising a programmable calculator from a server system to a client system across a network. A data request is sent to a database, the data request configured to retrieve data from the database comprising a plurality of fields and a target field. The retrieved data is processed using a machine learning algorithm to produce a weight for each field of the plurality of fields and a scoring data structure. The fields and the scoring data structure are sent to the client system across the network. A user selects values for the plurality of fields and the programmable calculator is configured based on the scoring data structure to generate a simulated value for the target field based on the user selected values.

Abstract: An apparatus for controlling an inverter for driving a motor including a processor which includes: a current processor configured to generate a voltage command for allowing a current detection value, generated by measuring a current provided from an inverter to a motor, to follow a current command for driving the motor; a voltage modulator configured to generate a pulse width modulation signal for controlling on and off states of a switching element within the inverter with a predetermined switching frequency based on the voltage command; and a frequency determining processor configured to randomly change the switching frequency based on driving information of the motor.

Abstract: A method for the improved speed determination of electric motors while taking into account angle errors of an angular position sensor is provided. A commutation sensor based on a magnetic rotary encoder, the angle signal of which has an angle-dependent and thus periodic angle error, is used. By differentiation, this defective angle signal is converted into a raw speed signal, which has two disturbance components. One disturbance component results from the angle error and is the disturbance waviness, which is periodic similar to the angle error. The second disturbance component is formed by a noise component superposing the raw speed signal. In order to correct the defective raw speed signal, half of the period duration of the raw speed signal must be ascertained. If this half of the period duration is ascertained two samples of the raw speed signal lying exactly one half of the period duration of the raw speed signal apart from each other are averaged.

Abstract: The present disclosure provides a method and a device for controlling a power factor on motor side and a system having the same, and the method includes: controlling the motor using a control approach of Id?=0 so as to obtain quadrature-axis voltage Uq? and direct-axis voltage Ud? in a virtual coordinate system of a current control cycle; calculating a first control value according to Uq? and Ud?; obtaining a power factor control target value, and calculating a target control value according to the power factor control target value; performing a PI control on a difference between the target control value and the first control value so as to obtain a coordinate deviation angle, and overlapping the coordinate deviation angle to a motor angle of the current control cycle so as to build a virtual coordinate system of a next control cycle, such that the power factor on the motor side is controllable.

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: A system for controlling an active material actuator includes an active material actuator configured to actuate when energized, a power supply configured to supply electrical power, and a control circuitry including a plurality of circuits and configured to selectively establish an electrical connection between the active material actuator and the power supply upon receipt of an activation signal. The control circuitry is configured to de-energize at least one of the circuits when no activation signal is received by the control circuitry in order to minimize parasitic current drawn from the power supply.

Abstract: A power conversion apparatus for converting AC power supplied from an AC power source to DC power includes an AC-DC conversion circuit connected with the AC power source at an input end thereof for converting the AC power to DC power, a DC-DC conversion circuit connected with an output end of the AC-DC conversion circuit at an input end thereof for converting DC voltage level of the DC power generated by the AC-DC conversion circuit, a smoothing capacitor parallel connected to the output end of the AC-DC conversion circuit and the input end of the DC-DC conversion circuit, a DC link voltage detector for detecting a voltage of the smoothing capacitor as a DC link voltage, and a control unit for controlling operation of the DC-DC conversion circuit. The control unit suppresses an output power of the DC-DC conversion circuit, if the DC link voltage is smaller than a predetermined value.

Abstract: A motor control system comprising a motor configured to operate at a rotational velocity and a control module in communication with the motor is provided. The control module is configured to receive a torque command indicating a desired amount of torque to be generated by the motor, obtain a rotational velocity of the motor, receive a desired phase advance angle for driving the motor; and generate a voltage command indicating a voltage magnitude to be applied to the motor based on the rotational velocity of the motor, the motor torque command, and the desired phase advance angle by using a plurality of dynamic inverse motor model equations that (i) allow the desired phase advance angle to exceed an impedance angle of the motor and (ii) specify that the voltage magnitude is a function of a voltage magnitude of a previous voltage command.

Abstract: A mine management system for a mine where an unmanned vehicle operates in an operation area of the mine, includes an exit determination unit determining based on position data of a moving body different from the unmanned vehicle whether the moving body exits the operation area, an abnormality monitoring unit ending monitoring abnormality of the moving body based on manipulation on an input device installed in the moving body, an entrance prohibited area setting unit setting an entrance prohibited area where entrance of the unmanned vehicle is prohibited so that the entrance prohibited area includes a position of the moving body and expands the entrance prohibited area when the abnormality is detected by the abnormality monitoring, and an alarm device control unit activating an alarm device installed in the moving body when it is determined that the moving body exits the operation area and the input device is not manipulated.

Abstract: A method and device are disclosed for synchronizing an inverter with an alternating voltage source. The method includes measuring a current generated by the alternating voltage source and flowing through diodes of the inverter, determining a phase angle and angular velocity relating to the alternating voltage source from the measured current for enabling synchronization between the inverter and the alternating voltage source, and starting modulation of the inverter according to the obtained phase angle and angular velocity.

Abstract: A power adapter system, method and device having two feedback loops that produces an output voltage on a load with a power converter using an input power. A feedback element coupled with the power converter comprises a first feedback loop that compensates for error on the output voltage. A noise detection element coupled with the power converter comprises a second feedback loop that detects noise and produces a noise feedback voltage based on the detected noise. Based on the noise feedback voltage a controller coupled with the power converter adjusts the operation of the power converter in order to compensate for or not respond to the effects of high frequency noise such as radio frequency noise on the first feedback loop of the system.

Abstract: A motor constant calculating method for a PM motor according to the present invention includes a voltage applying step of applying an applied voltage including a DC component and a plurality of frequency components to a PM motor, a motor current detecting step of detecting a motor current flowing depending on the applied voltage applied in the voltage applying step, and a motor constant calculating step of calculating a motor constant of the PM motor based on the applied voltage and the motor current.

Abstract: A method for minimizing power losses in an alternating current (AC) machine is provided. The method includes determining a first rotor flux signal based on signals of voltage and current inputs to the AC machine, and extracting a ripple component of the rotor flux signal. The method further includes determining a power compensating value that corresponds to a stored energy value of the AC machine, determining a second rotor flux signal that serves to minimize power losses, and providing the second rotor flux signal to a power inverting unit that adjust accordingly the voltage and current input signals provided to the AC machine.

Abstract: A resonance suppression control block includes a high-pass filter for extracting an AC component of DC link voltage, and a gain section for outputting a correction signal obtained by multiplying the AC component by a gain. A control unit controls an inverter based on a signal obtained by adding the correction signal to the voltage instruction. Thus, a power conversion apparatus with a simple configuration can be obtained that can suppress resonance of a DC link section and omit extra work for performing adjustment again in accordance with a power supply frequency.

Abstract: A method for determining phase angle in phase shift transformer for medium voltage inverter is disclosed, the method including selecting an arbitrary phase shift angle and phase angle relative to a unit power cell of the first stage, determining a phase angle displacement in consideration of the phase shift angle and the number of unit power cells connected to each phase of a motor, determining a phase angle of the unit power cell at the second stage using a phase angle of the unit power cell at the first stage, and adjusting a phase angle when the determined phase angle of the unit power cell at the second stage exceeds a predetermined phase angle.

Abstract: Systems and methods for processing power provided to downhole electrical systems such as electric submersible pump motors to increase the power factor of the supplied power. In one embodiment, a system comprises a downhole motor and a power factor corrector. The motor may be coupled to drive an electric submersible pump. The power factor corrector is configured to receive input power, process the received input power using one or more capacitive electrical components and thereby impart a capacitive phase shift between the voltage and the current of the received input power. The processed output power is provided to the downhole motor, which consumes the processed output power with a power factor which is greater than it would have been in the absence of the correction.

Abstract: A drive circuit is provided for reducing conducted electromagnetic interference provided by a power line to a motor controller. The power line includes a first alternating current (AC) line output and a second AC line output. The drive circuit includes an EMI filter having a first input terminal, a second input terminal, a first output terminal, and a second output terminal. The first input terminal is configured to be coupled to the first AC line output and the second input terminal is configured to be coupled to the second AC line output. The drive circuit further includes at least two series-coupled filter capacitors positioned after the EMI filter and a power factor correction (PFC) choke. The PFC choke is coupled at a first end to the second output terminal and at a second end between the series-coupled filter capacitors.

Abstract: Drive circuits that provide power factor correction and input current waveform shaping for controlling the speed and torque in a switched reluctance machine (SRM). The machine's phase windings are split into two segments, one of which is used for active power factor correction, input ac current waveform shaping and partial torque generation and the other of which is used for torque generation.

Abstract: A converter includes three AC reactors, a three-phase diode bridge, a plurality of smoothing capacitors connected in series between a DC output side of the three-phase diode bridge and a DC load, two flywheel diodes connected to positive and negative terminals on the DC side of the three-phase diode bridge, respectively. A reactor is inserted between the midpoint of the two flywheel diodes and the midpoint of the smoothing capacitors, three both-way energizing switches are arranged between the AC side of the three-phase diode bridge and the midpoint of the two flywheel diodes. The three both-way energizing switches are controlled to reduce higher harmonic components of power source current, and by the reactor interposed between the midpoint of the two flywheel diodes and the midpoint of the smoothing capacitors, reverse recovery currents of the three-phase diode bridge during turn-on of the three both-way energizing switches are suppressed.

Abstract: The present invention relates to a motor controller and related method. The invention is particularly well suited for use with an alternating current (AC) induction motor. Previously motor controllers did not take into account the combined effect a control circuit and controlled motor, had upon a mains supply and more particularly their separate and combined effect upon the power factor of an alternating current. The invention solves this problem by providing a motor controller which modifies an input current to an alternating current (AC) motor. The motor controller comprises: a power input rectifier; a low voltage power supply; a variable output voltage circuit for adjusting a drive output voltage circuit; and a control circuit arranged to control the variable output voltage circuit and to provide timed waveforms to the drive output voltage circuit.

Abstract: An actuator (1) comprises an electrical motor (10) for driving a damper (3) from a rest position to a stalled position. The damper (3) is biased toward the rest position with at least one spring. A control module (2) is configured to supply, upon activation of the actuator (1), a drive current to the electrical motor (10) for driving the damper (3) from the rest position to the stalled position against a bias force produced by the spring. The control module (2) is further configured to reduce the drive current to a lower level for maintaining the damper (3) in the stalled position when a defined duration of time has elapsed since activation of the actuator (1). Damages to the electrical motor (10) and/or gear trains can be avoided without having to provide any circuitry or sensory equipment for measuring the drive current.

Abstract: There are provided a power factor correction circuit capable of transferring extra power to a ground before performing switching for a power factor correction to thereby reduce a switching loss generated in switching for a power factor correction, and a power supply device and a motor driving device having the same. The power factor correction circuit includes: a main switch switching input power to adjust a phase difference between a current and a voltage of the input power; and an auxiliary switch switched on before the main switch is switched on, to thereby form a transmission path for extra power of the main switch.

Abstract: A method of power tuning an electric system, the electric system including an electric machine and a control system for driving the electric machine in response to control values stored in a power map. The method includes loading the control system with a first power map, driving the electric machine with the control system, measuring a power of the electric system, and loading the control system with a second power map in the event that the measured power lies outside a predetermined range.

Abstract: A motor control system includes a host ECU and a motor control device. The host ECU controls a wheel driving unit. A power supply to the ECU is halted when an IG switch is turned OFF. The motor control device receives a PWM command signal from the host ECU and controls a motor of a cooling blower. The host ECU modulates a duty ratio of pulses of the PWM command signal by a target rotating speed of the motor, modulates a period of the pulses of the PWM command signal by a continuous operation time of the motor, and transmits the result to the motor control device. The motor control device reconstructs both the target rotating speed and the continuous operation time, and controls rotating speed of the motor from the received PWM command signal. Moreover, the motor control device halts rotation of the motor when a signal-unreceiving time period of the PWM command signal becomes larger than the continuous operation time.

Abstract: A zero-cross detection unit monitors an AC voltage detected by a voltage sensor, generates a zero-cross point signal when the voltage crosses 0V, and supplies the signal to a controller. A rotation number setting unit sets a rotation number command to serve as a target of a synchronous motor. A rotation number correction coefficient data table stores correction coefficient data for a target rotation number. A correction coefficient data extraction unit extracts correction coefficient data in accordance with an elapsed time of the zero-cross point signal generated by the zero-cross detection unit from a rotation number correction coefficient data table, and outputs the data to a corrected rotation number creation unit. The corrected rotation number creation unit corrects the rotation number set by the rotation number setting unit in accordance with the extracted correction coefficient data, and outputs the corrected rotation number to a sine wave data creation unit.

Abstract: A circuit arrangement is for operating a load having a reactive characteristic on an AC power supply. The circuit arrangement enables the best possible reactive power compensation, that is, enables operation close to a cos ? of 1, in order to increase the overall efficiency of the arrangement or to achieve optimal energy savings. In order to control critical operating states, a feedback loop is provided that supplies a control current to a further reactive circuit element. This further circuit element is arranged parallel to the load or to the power factor correction capacitor, and is acted upon by a control current such that the control current counteracts a change in the reactive component of the load. The control current is derived from the load current as a variable proportional to the load current. In this way, a reactor for optimizing electromagnetic consumption is created.

Abstract: An energy saver delay circuit for an induction motor is disclosed. The energy saver delay circuit includes a power factor control circuit including an integrator, the integrator having a negative summing junction and a current injection circuit electrically connected to the negative summing junction, the current injection circuit configured for injecting an offset current into the negative summing junction to cause about the maximum available voltage from a power source to be supplied to the motor for a predetermined amount of time. Current injection may be triggered by voltage being applied to the motor, wherein the voltage exceeds a predetermined value. Alternatively, current injection may be triggered by current flowing through the motor, responsive to the current exceeding a predetermined threshold current. Alternatively, current injection may be triggered by voltage across the power factor control circuit, responsive to the voltage exceeding a predetermined threshold voltage.

Abstract: An AC power controller system applies three-phase AC operating power to an induction motor that drives a non-linear mechanical load. A primary low pass filter is connected in series between branch phase conductors and a power controller of the type that uses gate-controlled switching thyristors for controlling power to the motor. KVAR capacitors connected between the power controller and the induction motor phase windings form a secondary low pass filter across the controller output terminals. The primary and secondary low pass filters isolate the power controller and induction motor with respect to spurious noise and harmonics generated by local as well as remote sources, and also improve real power transfer efficiency from the power generating source to the induction motor by transforming the effective impedance of the power source and induction motor load.

Abstract: Systems and methods are provided for monitoring current in an electric motor. An electrical system includes a (DC) interface, an electric motor, an inverter module coupled between the DC interface and the electric motor, a first current sensor between a first phase leg of the inverter module and a first phase of the electric motor to measure a first current flowing through the first phase of the electric motor, a second current sensor between the first phase leg and the DC interface to measure a second current flowing through the first phase leg, and a control module coupled to the first current sensor and the second current sensor. The control module is configured to initiate remedial action based at least in part on a difference between the first current measured by the first current sensor and the second current measured by the second current sensor.

Abstract: A controller includes a voltage determination module, a bus voltage command module, and a power factor correction (PFC) control module. The voltage determination module determines a desired direct current (DC) bus voltage for a DC bus electrically connected between a PFC module and an inverter power module that drives a compressor motor. The voltage determination module determines the desired DC bus voltage based on at least one of torque of the compressor motor, speed of the compressor motor, output power of the inverter power module, and drive input power. The bus voltage command module determines a commanded bus voltage based on the desired DC bus voltage. The PFC control module controls the PFC module to create a voltage on the DC bus that is based on the commanded bus voltage.

Abstract: A device for improving efficiency of an induction motor soft-starts the motor by applying a power to the motor that is substantially less than the rated power of the motor then gradually increasing the power while monitoring changes in current drawn by the motor, thereby detecting when maximum efficiency is found. Once maximum efficiency is found, the nominal motor current is found and operating ranges are set. Now, the phase angle between the voltage and the current to the motor is measured and power to the motor is increasing when the phase angle is less than a minimum phase angle (determined during soft-start) and power to the motor is decreased when the phase angle is greater than or equal to the minimum phase angle as long as the voltage does not fall below a minimum voltage determined during soft-start.

Abstract: A device for supplying energy to a long stator winding having multiple winding sections. The device includes an energy source, a supply line connected to the energy source, section switches that are connected to the supply line and that each have a connection for connecting the switch to one winding section each. The device is configured to enable reactive (idle) power compensation independently of the closed-loop control of the energy source. The device for the reactive power compensation is configured to adjust the impedance of the device.

Abstract: The control apparatus for an electric rotating machine includes a prediction section to predict a controlled variable of the electric rotating machine applied with an output voltage of a power conversion circuit for each of prescribed operation states of the power conversion circuit, and a manipulation section to manipulate the power conversion circuit to operate in one of the respective operation states determined as an actual operation state based on the controlled variable predicted by the prediction section. The control apparatus further includes an average voltage direction calculating section to calculate a direction of an average output voltage vector of the power conversion circuit. The manipulation section includes a priority setting section to set priority for each of the operation states based on the direction of the average output voltage vector calculated by the average voltage direction calculating section in determining the actual operation state.

Abstract: Systems and methods for processing power provided to downhole electrical systems such as electric submersible pump motors to increase the power factor of the supplied power. In one embodiment, a system comprises a downhole motor and a power factor corrector. The motor may be coupled to drive an electric submersible pump. The power factor corrector is configured to receive input power, process the received input power using one or more capacitive electrical components and thereby impart a capacitive phase shift between the voltage and the current of the received input power. The processed output power is provided to the downhole motor, which consumes the processed output power with a power factor which is greater than it would have been in the absence of the correction.

Abstract: Assemblies for HVAC systems and methods of operating HVAC systems are disclosed, including a method of operating an HVAC system having a condenser motor operatively coupled to a fan and a controllable bus voltage for powering the condenser motor. The method includes increasing the controllable bus voltage from a first voltage to a second voltage to increase a speed of the condenser motor.

Abstract: The alternating voltage control apparatus which is inserted serially between an alternating-current power source and an inductive load and which controls adjustment of load voltage of the inductive load with a magnetic energy recovery switch reduces a voltage burden of a reverse conduction type semiconductor switch within the magnetic energy recovery switch and a capacitor and controls voltage to be supplied to the inductive load with a small advancing amount of a phase of current to be supplied to the inductive load.

Abstract: Certain exemplary embodiments can provide a system, machine, device, manufacture, circuit, and/or user interface adapted for, and/or a method and/or machine-readable medium comprising machine-implementable instructions for, activities that can comprise, via a predetermined information device, for a predetermined excavating machine comprising a plurality of Active Front Ends, each Active Front End electrically coupled to an AC power supply network of said predetermined excavating machine, each Active Front End adapted to provide DC power to a DC bus, said DC bus electrically coupled to a plurality of inverters, each inverter adapted to supply AC power to at least one operating motor, independently controlling a reactive power produced by each Active Front End.

Abstract: A method of controlling an electric machine that includes sequentially exciting and freewheeling a winding of the electric machine. The winding is excited in advance of zero-crossings of back emf in the winding by an advance angle, and the winding is freewheeled over a freewheel angle. The method then includes varying the advance angle and the freewheel angle in response to changes in the voltage used to excite the winding. Additionally, a control system for an electric machine, and a product incorporating the control system and electric machine.

Abstract: A device for improving efficiency of an induction motor that soft-starts the motor by applying a voltage to the motor that is substantially less than the rated voltage then gradually increasing the voltage while monitoring changes in current drawn by the motor, thereby detecting when maximum efficiency is found. Once maximum efficiency is found, the nominal motor current is found and operating ranges are set. Now, the voltage to the motor is increased/decreased by measuring the phase angle between the voltage and the current to the motor and increasing the voltage when the phase angle is less than a minimum phase angle (determined during soft-start) and decreasing the voltage when the phase angle is greater than or equal to the minimum phase angle as long as the voltage does not fall below a minimum voltage determined during soft-start.

Abstract: A first rectifier diode is electrically connected between a first input terminal where an alternating current (AC) power is received and a first output terminal where a direct current (DC) power is output. A second rectifier diode is electrically connected between the first input terminal and a second output terminal. The first and second rectifier diodes rectify first and second portions of the AC power into the DC power, respectively. When switching of a plurality of power factor correction (PFC) switches is enabled, the plurality of PFC switches increases a voltage of the DC power to greater than a peak voltage of the AC power. An inductor is electrically connected between a second input terminal and two of the plurality of PFC switches. When the switching is disabled, first and second bypass diodes provide a current path past the plurality of PFC switches and the inductor.

Abstract: An apparatus operable in a wet environment includes a voltage doubler circuit including a pair of diodes, a pair of direct current switching elements connected between the respective diodes and a common point, a controller, an interface connected to the controller for receiving external status signals, and a switching arrangement responsive to signals from the controller to select the full power mode or a controlled power mode. In the controlled power mode, the switching elements are switched in a predetermined sequence such that only one of the switching elements conducts current during any one half cycle of the AC output voltage applied to the motor.

Abstract: Systems and methods are provided for monitoring current in an electric motor. An electrical system comprises a direct current (DC) interface, an electric motor, and an inverter module between the DC interface and the electric motor. A first current sensor is configured to measure a DC current flowing between the DC interface and the inverter module. A second current sensor is configured to measure a first phase current flowing through the first phase of the electric motor. A control module is coupled to the current sensors, and the control module is configured to determine an expected value for the first phase current based at least in part on the DC current measured by the first current sensor and take remedial action based on a difference between the expected value and the measured first phase current.

Abstract: In the hybrid vehicle, a boost converter is controlled to make a post-boost voltage or a voltage on the side of an inverter become a target post-boost voltage corresponding to a target operation point of a motor in accordance with a target post-boost voltage setting map that divides an operation region of the motor into a non-boost region and a boost region when a operation point of the motor is included in the boost region. The target post-boost voltage setting map is prepared so that the non-boost region includes a region in which a loss produced by driving the motor when not boosting the post-boost voltages becomes smaller than the loss produced when boosting the post-boost voltage and the boost region includes a region in which the loss produced when boosting the post-boost voltage becomes smaller than the loss produced when not boosting the post-boost voltage.