Abstract: A system for reducing a specific absorption rate includes a source field generation unit wound with a first cylindrical coil and accommodating a source material therein, and generating a source field by applying a periodic input signal to the first cylindrical coil; a physical property change unit wound with a second cylindrical coil disposed adjacent to the first cylindrical coil and accommodating a transfer target therein, and changing a physical property of the transfer target based on the generated source field; and a target field circuit unit controlling the transfer target to form a target field by a PCB substrate with a power supply interface connected to a power supply and an input of the power supply.

Abstract: Provided is a reflective intelligent reflecting surface (IRS) flexible board, which includes: a flexible film; and a plurality of unit cells formed on the flexible film, in which each of the plurality of unit cells includes an IC for adjusting a reflection phase, a line pattern for driving the IC, and first and second antenna patterns formed symmetrically to each other based on the IC or the line pattern.

Abstract: A system may include a switching device. The switching device may include an armature that may move between a first position that electrically couples the armature to a first contact and a second position that electrically couples the armature to a second contact. The switching device may also include a coil that may receive a voltage that magnetizes a core, thereby causing the armature to move from the first position to the second position. The system may also include a control system that may monitor a voltage waveform associated with the coil during an open operation of the switching device.

Abstract: A system may include an armature configured to move between a first position that electrically couples the armature to a first contact and a second position that electrically couples the armature to a second contact. The system may also include a coil configured receive a current, such that the current conducting in the coil is configured to magnetize a core. The magnetized core may cause the armature to move from the first position to the second position. The system may also include a control system configured to detect a position of the armature based on an inductance of the coil.

Abstract: A display device includes a substrate having a display area and a non-display area. A plurality of pixels is disposed in the display area. A chip mount area is disposed on the non-display area. The chip mount area includes a data output pad unit, a lighting test transistor unit and a plurality of lines connecting the data output pad unit and the lighting test transistor unit. The lighting test transistor unit is configured to transfer at least one lighting test signal to the plurality of pixels through the data output pad unit. The resistances of each of the plurality of lines are the same.

Abstract: An electromagnetic relay diagnostic device includes: an operation detection unit including a first light-emitting unit emitting light when a current flows through a wiring line connected to a coil of an electromagnetic relay; an operation detection unit including a second light-emitting unit emitting light when a current stops flowing through the wiring line; an operation detection unit including a third light-emitting unit emitting light when detecting a change in conductive state of a wiring line connected to a contact of the electromagnetic relay; an operation detection unit including a fourth light-emitting unit emitting light when detecting that the change in conductive state of the wiring line has disappeared; an imaging unit capturing a moving image of the operation detection units; and a diagnostic unit calculating a contact-on operation time and a contact-off operation time using the moving image, and diagnosing whether an abnormality has occurred in the electromagnetic relay.

Abstract: An electromagnetic valve drive device which supplies a hold current with a prescribed fluctuation range to an electromagnetic coil of an electromagnetic valve after a current peak when a supply of electricity starts has passed includes: a power supplier which intermittently applies a drive voltage to the electromagnetic coil; a detector which detects the hold current; a first comparator which compares a detected current by the detector with a first threshold value; a filter which performs integration processing on an output of the first comparator; a second comparator which compares an output of the filter with a second threshold value to generate an output signal used for generating a control signal for controlling the power supplier; and a control signal generator which generates the control signal for controlling the power supplier based on the output signal of the second comparator, wherein the filter is a count-up/down type digital filter.

Abstract: A system for controlling a display in which each pixel circuit comprises a light-emitting device, a drive transistor, a storage capacitor, a reference voltage source, and a programming voltage source. The storage capacitor stores a voltage equal to the difference between the reference voltage and the programming voltage, and a controller supplies a programming voltage that is a calibrated voltage for a known target current, reads the actual current passing through the drive transistor to a monitor line, turns off the light emitting device while modifying the calibrated voltage to make the current supplied through the drive transistor substantially the same as the target current, modifies the calibrated voltage to make the current supplied through the drive transistor substantially the same as the target current, and determines a current corresponding to the modified calibrated voltage based on predetermined current-voltage characteristics of the drive transistor.

Abstract: A torque generating device includes a magnetic disk configured to rotate around a rotation axis, first and second yokes located on opposite sides across the magnetic disk, a coil disposed to overlap the magnetic disk along a direction of the rotation axis, a third yoke of which at least a region proximity to the magnetic disk is located outside the magnetic disk and the coil and that makes up a magnetic path of a magnetic field generated by the coil with the first and second yokes, and a magnetic viscous fluid filled between the magnetic disk and the first and second yokes. The third yoke has a magnetic gap between the third and first yokes. The magnetic gap is formed at a position outside an outer peripheral edge of the magnetic disk or overlapping the outer peripheral edge of the magnetic disk along the direction of the rotation axis.

Abstract: An injection control device has a current supply controller controlling a supply of an electric current for opening and closing a fuel injection valve, a current monitor monitoring the electric current supplied to the valve, and a boost controller performing a boost voltage generation control that generates a boost voltage from a power supply voltage by a tuning ON/OFF of a switching element for supplying a peak current to open the valve. When the current supply controller supplies the peak current to the fuel injection valve, the boost controller stops the boost voltage generation control in a stop period that includes a timing when an electric current supply amount takes a threshold value of the peak current.

Abstract: Disclosed is a method for controlling a DC-DC voltage converter for current-driving at least one fuel injector of a motor vehicle internal combustion engine. The method notably includes the steps of determining a time referred to as the “recovery” time at which the output voltage crosses the predefined high voltage threshold, of determining a time referred to as the “drop” time, corresponding to the start of injection, at which the output voltage decreases below the predefined high voltage threshold, and of calculating the time elapsed between the recovery time and the drop time.

Abstract: A magnetic flowmeter for measuring a fluid flow includes a flow tube assembly receiving the flow and having a coil with first and second coil wires for receiving a coil current and responsively producing a magnetic field thereby generating an EMF in the fluid representative of a flow rate. An EMF sensor is arranged to sense the EMF and generate an output indicating the flow rate. Current supply circuitry applies a current supply signal to the coil. A load leveling boost supply provides power to the current supply circuitry. In another aspect, power scavenging circuitry recovers power from the coil.

Abstract: Techniques for diagnosing failures in a digital solenoid I/P converter are provided herein. A controller of the I/P converter may apply a fixed voltage to the I/P converter, causing an armature to move from an off-position to an on-position in a properly-functioning I/P converter. The controller may receive an indication of whether a digital logic line trip has occurred, indicating that a current for the I/P coil has reached a desired maximum current level, and an elapsed time from the application of the fixed voltage. The controller may compare the amount of time elapsed from the application of the fixed voltage to an expected amount of elapsed time from the application of the fixed voltage to the I/P coil after which a digital logic line trip will occur for a properly functioning I/P coil and diagnose, based on the comparison, a failure in the I/P converter.

Abstract: A load drive circuit includes a power source terminal (“PST”), a power source and a load terminal connecting a load to the power source. A semiconductor switch connects the PST to the load terminal. A control circuit includes an output terminal for opening/closing the semiconductor switch. A freewheeling circuit includes a freewheeling diode and a protection switch blocks a current from the power source to the semiconductor switch when the power source is connected in a reverse manner. A first terminal connects the control circuit to a first fixed potential and a second terminal connects an anode of the freewheeling diode to a second fixed potential. A connection circuit includes a connection switch connecting the output terminal and the first terminal. The connection circuit connects the output terminal to the first terminal when a rise in a potential difference between the first terminal and the second terminal is detected.

Abstract: The invention relates to a medium voltage switching apparatus. The medium voltage switching apparatus includes one or more electric poles, each electrically coupleable with a corresponding electric line; for each electric pole, a fixed contact and a movable contact, the movable contact being reversibly movable between a decoupled position from the fixed contact and a coupled position with the fixed contact, the movable contact moving from the decoupled position to the coupled position during an closing manoeuvre of the switching apparatus and moving from the coupled position to the decoupled position during an opening manoeuvre of the switching apparatus; and actuating means adapted to actuate the movable contacts of the one or more electric poles. A control unit is adapted to select and carry out a selectable control routine in response to receiving an input signal at an input arrangement corresponding to the selectable routine.

Abstract: Embodiments of the present disclosure provide method, controller and system for regulating a current of a coil. The method comprises: obtaining a first sample value of the current of the coil at a first moment, the first sample value being associated with a duty cycle of a PWM signal applied to a control end of a switch and the switch being coupled in series with the coil; obtaining a second sample value of the current of the coil at a second moment; determining a difference value between the first and the second sample values; and updating the duty cycle of the PWM signal based on the difference value to regulate the current of the coil. According to embodiments of the present disclosure, the inrush current of the coil generated at the moment of closing the contactor can be limited to a target current value, so as to increase the service life of the contactor.

Abstract: An example embodiment relates to a method for switching a current in an electromagnet of a switchable solenoid valve, wherein, in successive switching cycles, the current is in each case switched on in order to close the valve against a force of a spring, and thereby the current is generated by electrical connection of the electromagnet to a voltage source. The example embodiment makes provision for the current in the electromagnet to be generated with a current direction opposite to the respective previous switching cycle in at least two successive switching cycles in a switched operation of the valve.

Abstract: A display device and a method of driving the same are provided. The display device according to an embodiment of the disclosure includes: a display panel including a plurality of pixel lines in an area A, an area B, and an area C; a panel driver configured to: supply input image data to pixel lines in the area A during a first period; supply black image data to pixel lines in the area B during a second period following the first period; and supply input image data to pixel lines in the area C during a third period following the second period; and a timing controller configured to adjust a first input image data to be supplied to a last pixel line in the area A to a first adjusted data based on a first compensation table.

Abstract: A device for maintaining an operation state of a relay with a second voltage value that is less than a first voltage value, the first voltage value being an initial driving voltage for the relay, includes: a main switch to output an output voltage to the relay by switching an input voltage according to a main operating voltage that varies according to an ON-OFF state of a first switch; the first switch to adjust the main operating voltage according to a first operating voltage that varies according to an ON-OFF state of a second switch; the second switch to control the first operating voltage according to an output voltage of a comparator; the comparator to output the output voltage by comparing a reference voltage value with a voltage of a reference node; and a third switch to control the voltage of the reference node according to an input signal.

Abstract: A control device for an electromagnetic drive of a switchgear includes: a power supply unit for generating a pick-up and a holding DC voltage for the electromagnetic drive of the switchgear, depending on a control signal; and a control unit for generating the control signal, which unit is designed to generate a second control signal for actuating a switch for joining or disconnecting the drive to or from the pick-up or holding DC voltage generated by the power supply unit. The power supply unit includes a switched-mode power supply unit that is designed for an input voltage range matched to an operating voltage range of the switchgear, the input voltage range being approximately 48 volts to approximately 240 volts, approximately 110 volts to approximately 240 volts, or approximately 24 volts to approximately 240 volts. The control unit is designed to generate the second control signal depending on a measuring voltage.

Abstract: A control device includes a plurality of sound reducing parts that is operated individually, when a predetermined condition for operation is met, at each of a plurality of timings when an operating sound is generated as a result of a movement of a valve body, in one open-and-close period, and that reduces the operating sound, at each of the plurality of the timings, by changing a period of energizing an electromagnetic part to an increase side relative to a normal time, an upper limit determination part that determines whether a required period of energizing the electromagnetic part in the one open-and-close period exceeds a predetermined upper limit value, when all the plurality of the sound reducing parts are operated, and a selectively operating part that selects and operates one or more of the plurality of the sound reducing parts to an extent that the required period of energizing does not exceed the upper limit value, when the upper limit determination part has determined that the required period of ene

Abstract: A method for controlling an electromagnetic drive of a switching device by means of a program, wherein a processor configured by the program executes the following steps: measuring a control voltage applied at an input of the switching device; activating the electromagnetic drive on the basis of the measured control voltage; and setting a rated voltage range on the basis of the measured control voltage.

Abstract: When a condition for reducing a noise caused in the high-pressure pump is satisfied, a reduction control unit implements a noise reduction control to supply a smaller power to reduce a moving speed of a movable portion in a close acting direction to put a valve body into a closed state for a predetermined time after an energization start timing of a solenoid in a plunger rising period. A closing control unit causes a closing current, which is a constant current for surely putting the valve body into the closed state, to flow the closing current in the solenoid when the noise reduction control is completed in the plunger rising period. The predetermined time is shorter than an energization period in which a current flows in the solenoid.

Abstract: An apparatus and method for stopping a linear resonant actuator is presented. A control system for use with an oscillating device has a response signal having a back electromotive force component and a driver adapted to provide a drive signal to the oscillating device. The control system has a sensor adapted to sense an electrical parameter of the response signal and a controller coupled to the sensor and to the driver. The controller has a calculator adapted to determine a sign of curvature of a portion of the response signal based on the electrical parameter, and the controller is adapted to provide a control signal to adjust the amplitude of the drive signal to slow down the oscillating device, and withdraw the drive signal upon identifying a change in the sign of curvature.

Abstract: A method for simulating a peripheral circuit arrangement that can be connected to a control device is provided. A simulation device is electrically connected to the control device and has a first control element with which a first simulation current that can be passed from a first load terminal of the control device to a first control element output of the first control element can be influenced. The first control element includes a first multistage converter, and the simulation device also includes a first semiconductor switch control and a computing unit that executes model code. A first switch control signal is computed and provided for forwarding to the first semiconductor switch control, which has at least one first comparator. A pulse-width-modulated first gate-source voltage is generated and applied to a first control terminal and a first simulation current is influenced by the first gate-source voltage.

Abstract: An active matrix substrate includes: first to third lines in first to third line layers, respectively, a signal that is different from a signal supplied to the first lines and the second lines being supplied to the third lines; first connection lines that connect the first lines or the second lines with first terminals; second connection lines that connect the third lines with second terminals; inspection TFTs 61 connected with the second connection lines; and common lines 63, 64. Each of the second connection lines 24c is connected to any one of the common lines through the inspection TFT 61. A space between the adjacent two second connection lines 24c connected to the same common line through the second connection line switching elements is wider than a space between the second connection lines 24c connected to different ones of the common lines, respectively, through the second connection line switching elements.

Abstract: A simulation device for simulating a peripheral circuit arrangement that can be connected to a control device, wherein the simulation device can be electrically connected to the control device, and the simulation device has a first control element for influencing a first simulation current that can be passed from a first load terminal of the control device to a first control element output of the first control element. The first control element contains a first multistage converter that includes a first converter output, which is electrically connected to a terminal on the converter side of a first inductive component at whose terminal on the control device side the first control element output is implemented. A direction of flow of the first simulation current is reversible, and the simulation device also includes a computing unit for execution of model code.

Abstract: Disclosed is a DC adaptor for driving a magnetic contactor including at least: an AC input terminal; a capacitor connected to the AC input terminal; an electronic switch connected to the capacitor in parallel; a full-wave rectifier which converts an AC current into a DC current; a DC output connecting line which receives the DC current from the full-wave rectifier to transmit the DC current to the magnetic contactor; a sensing unit which measures a current value of a driving coil of the magnetic contactor; a controller which compares the measured current value with a reference value to output an on/off control signal of the electronic switch; a DC power source which generates a DC power using the DC current converted by the full-wave rectifier; and a housing which accommodates the above elements.

Abstract: A control device that includes an electronic control unit that is configured to: detect an actual current value flowing through the solenoid valve; receive a current command value and the actual current value detected and generate a primary command voltage value while feeding back the current command value on the basis of the actual current value; calculate a dither command voltage value to cause a periodic voltage oscillation; filter the actual current value detected to remove a frequency corresponding to a period of the dither command voltage value and output the filtered actual current value; generate a secondary command voltage value by superimposing the dither command voltage value generated on the primary command voltage value generated; convert the secondary command voltage value generated into a PWM signal; and generate, on the basis of the PWM signal generated, an application voltage to be applied to the solenoid valve.

Abstract: A current control unit in a fuel injection device controls a magnitude of a current flowing through a coil during single energization. A current Ip1 flows once a signal input to the current control unit is turned ON at time t11. As a result, a movable core and a needle abut against each other with a lift amount increased at time t12, and then the needle is separated from a valve seat and pre-injection is performed. At time t13, which follows the pre-injection, the needle and movable core lift amount becomes a lift amount D1 at a time when the needle and the valve seat abut against each other, and temporary valve closing occurs. At time t14, which follows time t13, currents Ix1 and Im1 larger than the current Ip1 are caused to flow through the coil, and then main injection is performed with the needle and movable core lift amount turned into a lift amount D2 larger than the lift amount D1. Therefore, fuel injection can be performed twice during the single energization.

Abstract: A display device has a substrate with a first pixel area and a second pixel area smaller than the first pixel area. First pixels in the first pixel area are connected with first scan lines. Second pixels in the second pixel area are connected with second scan lines. A first scan driver supplies a first scan signal to the first scan lines, and a second scan driver supplies a second scan signal to the second scan lines. A first signal line supplies a first driving signal to the first and second scan drivers. The first signal line includes first sub signal line to supply the first driving signal to the first scan driver, a second sub signal line to supply the first driving signal to the second scan driver, and a first load matching resistor connected between the first sub signal line and the second sub signal line.

Abstract: A solenoid drive device includes a first solenoid drive circuit, a second solenoid drive circuit, a selection circuit, and circuitry. The circuitry controls the first switching element and the second switching element with a duty control in a control cycle according to acquired values of the first drive current and the second drive current so that a first on/off switching direction of the first switching element at a start timing of the control cycle is opposite to a second on/off switching direction of the second switching element at the start timing. The circuitry determines whether a failure in at least one of the selector, the first solenoid drive circuit, and the second solenoid drive circuit occurs based on a change in the selection detection signal in a period during which an on/off state of the first switching element is different form an on/off state of the second switching element.

Abstract: A controllable trip device includes a magnetic actuator, including a coupling member intended to be coupled to a switching mechanism of an electrical circuit breaker to cause the switching thereof and a coil configured to displace the coupling member towards a tripped position when it is supplied with a pulse of a current of intensity greater than a first predefined threshold for a duration greater than or equal to a predefined duration, a control device, configured to supply the coil, immediately on receipt of a control signal, with a series of pulses of duration equal to the predefined duration and of intensity greater than or equal to the first threshold and less than or equal to a second threshold equal at most to 120% of the first threshold.

Abstract: There is provided an electromagnet control apparatus that continuously attracts crushed pieces of metals with the core of a magnetized electromagnet without immediately releasing the attracted pieces in a composite operation of a construction machine. The electromagnet control apparatus includes a control unit that controls a demagnetized state, a magnetized state, or a counter-magnetized state of an electromagnet. Until the end of a first threshold time tth1 from a transition to the demagnetized state from the magnetized state, the control unit ignores a turn-on voltage for turning on first transistors (a first transistor, a fourth transistor) and turns on the first transistors after a lapse of a second threshold time that is shorter than the first threshold time. The demagnetized state and the magnetized state are repeated until the end of the first threshold time tth1 from the transition to the demagnetized state.

Abstract: A diagnostic method for contact resistance failure includes estimating electrical contact surface resistance of at least one contactor, determining a faulted status of the at least one contactor and indicating the faulted status of the at least one contactor if the at least one contactor is in the faulted status.

Abstract: In an elevator control apparatus, a DC-DC converter including a first switching element and a second switching element is configured to generate power for driving an elevator brake by alternately operating each of the first switching element and the second switching element. A first photocoupler and a second photocoupler are configured to independently operate the first switching element and the second switching element, respectively. A first calculation unit and a second calculation unit are configured to independently control power supply voltages of the first photocoupler and the second photocoupler, respectively.

Abstract: An apparatus for predicting an operating time in a power device includes an operating characteristic parameter estimating unit, and only the operation historical data in the vicinity of a current operation environmental condition is extracted and input by a vicinity operation historical data extracting unit.

Abstract: According to one embodiment, a signal monitoring circuit includes a first comparator circuit that compares an input signal with a first reference value to output a first output signal, a second comparator circuit that compares the input signal with a second reference value different from the first reference value to output a second output signal, a delay time detecting circuit that detects a time difference between times at which the first and second output signals are output, and a threshold-value comparator circuit that compares the detected time difference with a predetermined threshold value to output the comparison result.

Abstract: In some embodiments of the present disclosure, a method for operating an inductor coil may include: charging a capacitor by means of a charging current at a reference voltage; and discharging the charged capacitor in an oscillating manner via the inductor coil. The discharging is ended when a current passing through the inductor coil has passed through an entire oscillation period or a multiple thereof.

Abstract: In a fuel system of an internal combustion engine, fuel is delivered by a high-pressure pump into a fuel rail. The quantity of the delivered fuel is influenced by a quantity control valve (30) actuated by an electromagnetic actuating device. A limit-value retaining current is ascertained, at which the quantity control valve still remains in its closed state or is just opening.

Abstract: The present invention relates to a control method for an electromagnetic contactor and an electromagnetic contactor implementing such a method, where the method includes supplying an electromagnet of the contactor with a pulse width modulation supply signal and having a nominal frequency, the method also including varying the period over at least part of the pulses of the modulation so as to reduce the conducted electromagnetic disruptions, the variation of the period being chosen such that the frequency of the supply signal remains comprised in a given frequency band including the nominal frequency.

Abstract: A method and apparatus using electromagnetic switching in a two-step connection process is provided to minimize surge currents and torque oscillations in three-phase motors during starts.

Abstract: A current control device sets a target current value of a solenoid, and sets a duty ratio of a PWM signal outputted to a drive circuit of a solenoid based on the target current value. The target current value is a value that periodically varies in a dither period longer than a PWM period of the PWM signal. A setting period of the target current value and a setting period of the duty ratio are shorter than the dither period. As compared with a configuration where the duty ratio is set in the dither period, a time period from a time a basic current value is changed to a time the duty ratio is renewed is shortened. A operation responsiveness of a movable core of the solenoid improves.

Abstract: An example circuit may include an inductor; a low-frequency sensor connected to the inductor; a high-frequency sensor connected to the inductor; and an integrator connected to the low-frequency sensor and the high frequency sensor, comprising one or more resistive devices and one or more capacitive devices, wherein the integrator is characterized by a time constant that varies as a function of the inductance of the inductor. The inductor may, for example, be part of a switched-mode power supply or an amplifier.

Abstract: A method for assessing the status of an electromechanical actuator device is disclosed. The actuator device is provided for actuating control element apparatuses in an internal combustion engine for a motor vehicle. This actuator device has an activation apparatus and a stator apparatus as well as at least one electrical coil apparatus. The actuator device can be changed over from a first operating state into a second operating state. During the changeover, activation power is fed to the coil apparatus by a control line apparatus. In the method, the activation power is fed to the actuator device, the feeding of the activation power is reduced, and the control line apparatus is monitored and an actuator assessment characteristic variable is determined from the data acquired in the process. Furthermore, the actuator assessment characteristic variable is assessed by a comparison variable which is based on the fed-in activation power.

Abstract: An organic light-emitting display apparatus including emitting pixels including drivers for displaying gradation by making a light-emitting device selectively emit light according to a logic level of a data signal transmitted to each of the sub-fields forming a frame, and dummy pixels coupled to a repair line that is coupled to a light-emitting device of a first emitting pixel from among the plurality of the emitting pixels, wherein the dummy pixels include a first dummy driver for making the light-emitting device of the first emitting pixel emit light by charging the repair line when a data signal having a first logic level is transmitted, a second dummy driver for discharging the repair line when a data signal having a second logic level opposite to the first logic level is transmitted, and a boost capacitor coupled to the repair line and for controlling a charging/discharging speed of the repair line.

Abstract: In aspects of the invention, a zap circuit and a decoder for decoding the output of the zap circuit turn ON only one analog switch in a selector. The selector delivers an electric potential at a node of a dividing resistor selected by the zap circuit. The output of the selector is delivered to the non-inverting input of an operational amplifier, and the output of the operational amplifier is delivered to the gate terminal of a MOSFET. The operational amplifier controls the gate of the MOSFET so that the potential at a current detecting resistor equals the output of the selector. As a result, a current proportional to the input voltage flows through the MOSFET. Because the current through a dividing resistor is also proportional to the input voltage, the total current is eventually proportional to the input voltage.

Abstract: A deposition detection circuit (3) provided in a deposition detection device (1) includes a determination circuit (4) determines whether the movable contact (9) is deposited based on a step input signal and a transient response signal when a drive signal is in an off state. The transient response signal is generated so as to correspond to voltage less than or equal to operating voltage of the electromagnetic relay switch (5) according to an excitation coil (6) and a fixed resistor (R1).

Abstract: We describe a controller (130) for controlling a power semiconductor switching device (132) into a selected one of a plurality of states, the states including a fully-off state, a saturated-on state, and at least one intermediate state. The switching device controller includes a voltage sense input (142) to sense a voltage on the device; a current sense input (current feedback) to sense a current passing through the device; a negative feedback control circuit (138) coupled to the sense inputs, a control output (136) to provide to the power semiconductor switching device a drive signal with a response dependent on one or more adjustable parameters; and a circuit controller (140) to control the adjustable parameters responsive to state command data, to control the switching device into a selected state, in particular by controlling an effective resistance of the device. Preferred intermediate states include an active low current state and an active low voltage state.

Abstract: Methods and systems are provided for controlling an active vibration system. In one embodiment, a method of controlling an active vibration system associated with an engine is provided. The method includes: receiving engine parameters indicating one or more engine operating conditions; determining an operating mode of the active vibration system to be at least one of a sensing mode and a force generation mode based on the engine parameters; and selectively controlling the active vibration system based on the operating mode.