Abstract: A synchronous motor having phase windings which are split or tapped and in which the conduction angle of the applied alternating current is varied at one or more taps to allow the motor to start in a controlled direction and be torque controlled to synchronous speed.

Abstract: A voltage detector 17 for detecting a voltage VB of a battery 9 as a main power supply and a voltage detector 18 for detecting a voltage VC of an auxiliary power supply 14 are provided. On the basis of an upper limit value IB previously defined as the maximum value of current through the battery 9, a control circuit 6 defines an upper limit of the electric power supplied to the motor 4 as ?·VB·IB (? representing the efficiency of the driving circuit 5) when a first output mode is selected in which the auxiliary power supply 14 is not used or defines the upper limit of the electric power supplied to the motor 4 as ?·(VB+VC)·IB when a second output mode is selected in which the auxiliary power supply 14 is used as connected in series with the battery 9.

Abstract: It is possible to suppress vibration of a rotary machine in a rotary machine control apparatus. A drive control system of a fuel cell vehicle having a rotary machine includes a control unit having: a drive permission power calculation module which calculates the rotary machine drive permission power according to the states of a fuel cell and an accumulator as power sources of the rotary machine: a limit torque calculation module which calculates a limit torque of the rotary machine according to the drive permission power; and a filter processing module which performs a low-pass process on the limit torque calculation. A storage device of the control unit stores a filter processing region map indicating the region where the filter process is executed by correlating the region with the drive permission power and the rpm.

Abstract: The object is to effectively reduce the resonant current flowing inside a converter unit and an inverter unit in a power conversion apparatus for an electric vehicle. The power conversion apparatus includes a converter unit that converts an alternating-current power into a direct-current power, an inverter unit that converts the direct-current power into an intended alternating-current power and supplies the intended alternating-current power to an electric motor that drives an electric vehicle, a housing that accommodates the converter unit and the inverter unit and a part of which is connected to ground, and a magnetic core that is disposed inside the housing and that suppresses the resonant current flowing between the converter unit and the inverter unit.

Abstract: There is disclosed a method and a circuit arrangement for the feedback of commutation energy in three-phase current drive systems with a current intermediate circuit converter. Commutation energy is released at each commutation in the inverter. The commutation unit ensures that the released energy is directly fed back to the current intermediate circuit in two steps. In the first step, the commutation energy is fed into the commutation capacitor by a rectifier circuit (diode bridge and three triacs). In the second step, the commutation energy is fed directly from the commutation capacitor into the current intermediate circuit by means of three semiconductors (first RIGBT, second RIGBT, diode) so that the current of the intermediate circuit flows through the capacitor over a controlled period of time.

Abstract: A brushless D.C. motor includes having a rotor and a plurality of stator windings that define a stator field when driven by a bridge circuit, where a microprocessor drives the bridge circuit using a pulse-width modulation logic. The brushless D.C. motor is driven by triggering a commutation of the stator field; voltage induced by rotating the rotor in a non-energized stator winding is monitored to determine whether the voltage reaches, exceeds or is below a threshold voltage. A delay time between triggering the commutation of the stator field and the voltage reaching, exceeding or being below the threshold voltage is determined; and using the determined delay time a triggering time point for a next commutation of the stator field.

Abstract: A sealed electric compressor having a normally-off type pressure switch and a fuse element. The pressure switch is placed in a sealed housing, connected parallel to a main winding of an electric motor, and, when the pressure of refrigerant in the sealed housing is abnormally high, activates to short-circuit the main winding. The fuse element is connected in series to the main winding and an auxiliary winding of the electric motor and interrupts conduction of electricity to the electric motor when an excess current that is produced when the pressure switch short-circuits the main winding flows.

Abstract: A method for estimating power capability of a power source driving an electrical load can include obtaining initial values of power source parameters including a voltage value and a current value while preventing the power source from causing kinetic energy to be produced in the electrical load. The method can also include estimating power capability of the power source based on the initial values of the power source parameters.

Abstract: A medium voltage variable frequency drive having a 2-high controller configuration with a dual bus system is described. The drive control system includes at least one motor control cabinet housing a fused medium voltage bypass controller, a non-fused transfer controller positioned above the fused medium voltage bypass controller, an extendable output bus coupled to the non-fused medium voltage transfer controller, and an extendable supply bus coupled to the fused medium voltage bypass controller. The drive control system further includes a variable frequency drive cabinet housing a variable frequency drive. The variable frequency drive is coupled to the extendable output bus and a power supply line. The power supply line may be further coupled to the extendable supply bus. The drive control system includes at least one cabling transition cabinet housing cabling between the at least one motor control cabinet, the power supply line, and the variable frequency drive.

Abstract: A control device, for a servo die cushion, capable of improving a response after overshoot generated by collision of a slide and a die cushion. The control device has a local maximum point judging part which judges a local maximum point based on the detected speed of the servomotor; a speed correction value calculating part which calculates a speed correction value for the servomotor based on the judgment result and the detected speed of the slide; a second force commanding part which generates a second force command value, the second force command value decreasing from an initial value to a first force command value, the initial value being equal to the force detected value when reaching generally the local maximum point. The force command value is switched from the first force command value to the second force command value, when the force detected value reaches the local maximum point.

Abstract: A numerically controlled machine tool which has a linear feed axis and a rotational feed axis and which has functions for measuring in advance, errors of a relative position and a relative attitude of a main spindle relative to a work table by positioning the linear feed axis and the rotational feed axis to specified position and attitude, and correcting a movement command based on measured error data, the error data being multi-dimensional data containing a position error and an attitude error. The machine tool includes a error data storage means which store an error map that is prepared by collecting a plurality of the error data corresponding to positions and rotation angles of the linear feed axis and the rotational feed axis, and a correction data computing means which compute correction data for correcting the movement command from a command position for the linear feed axis and the rotational feed axis and the error data stored in the error data storage means.

Abstract: A rotating electrical machine including a first member (10) capable of generating a magnetic field which rotates relative to the first member, and a second member (6) which is provided with a winding through which a current can flow, such that the rotating magnetic field drives the second member in rotation. An electrical value which is at least related to the current is measured (18) and the generation of the rotating magnetic field is started (12) at a time which is determined as a function of the electrical value which is measured. A method of controlling the machine is also disclosed.

Abstract: A starting circuit for a single-phase AC motor, the single-phase AC motor comprising a main winding and a starting winding, and the starting circuit comprising a detecting circuit, a rectifying circuit, a triggering circuit, and a switch, wherein the detecting circuit is connected in series with the main winding, the switch is connected in series with the starting winding, the detecting circuit transfers current parameters of the main winding into detecting signals, the rectifying circuit processes the detecting signals and transmits the detecting signals to the triggering circuit, the triggering circuit controls the switch according to the detecting signals whereby controlling power-on and power-off of the starting winding, and the triggering circuit is a hysteresis comparing circuit.

Abstract: The invention is method of rapid electrical charging of secondary cells without excessive heat generation. An ionic capacitor having a metal shell is placed in electrical contact with the metal positive nickel oxide plate of an Edison alkaline cell battery comprising a plurality of said cell plates. A heavily charged electrolyte flowing from the cathode system passes through the said ionic capacitor and conducts electrons through its metal shell into the positive metal plates of the battery thereby converting by chemical reduction the oxidized nickel oxide (NiO3) to NiO. The expended charging electrolyte, which contains calcium hydroxide Ca(OH)2 is a value-added product and is used in commercial production of acetylene and cyanimide. The flow volume weight of the electrolyte and its specific heat flowing through the said ionic capacitor and passing out of thermal contact with the battery electrolyte (KOH) carries away excessive heat from the battery.

Abstract: A solar chargeable battery comprises a built-in photovoltaic array and a programmable battery charging circuit. The photovoltaic array provides a variable power source in response to light. The battery charging circuit receives the variable power source and operates in different modes to charge the battery over a range of lighting conditions. For example, the battery charging circuit charges the battery to a substantially fixed regulated voltage level in a first mode when a voltage level of the variable power source is above a predefined threshold. The battery charging circuit charges the battery to an adjustable regulated voltage level in a second mode when the voltage level of the variable power source is below the predefined threshold.

Abstract: Exemplary embodiments are directed to wireless charging. A charging system may comprise at least one power generation system configured to convert renewable energy to another form of energy and convey the another form of energy. The charging system may further include at least one transmit antenna coupled to the at least one power generation system and configured to receive the another form of energy from the at least one power generation system. Further, the at least one transmit antenna is configured to wirelessly transmit energy to at least one other antenna positioned within an associated coupling-mode region.

Abstract: An article of manufacture, comprising: an LED or other light source in thermal communication with a thermoelectric module; and a feedback circuit that directs current generated by the thermoelectric module to at least one device. This invention improves on prior art by recycling heat produced by the LED or other light source into electricity produced via the thermoelectric module to be used by the light source, a cooling device, battery charger for battery backup system, control or monitoring system, etc.

Abstract: A portable power supply system comprising several portable power sources coupled to a power supply charging circuit, wherein said power supply charging circuit comprises an inverter, a charger and a control unit that controls the portable power source delivery of energy in order to reduce damages to said portable power source.

Abstract: The present invention relates to a power transfer system which comprises a power transfer device (10) as well as at least one portable device (20), and to a method of controlling the power transfer system specifically in case of a dead battery condition of a battery (21) of the portable device (20). The power transfer device (10) for wireless charging of the battery (21) arranged in the portable device (20) and the power transfer device (10) each comprise a near field communication functionality for data communication by a data communication link (32) between the devices. The method includes a step of starting to establish the data communication link (32) between the power transfer device (10) and the portable device (20). When the establishment of the data communication link (32) is started, the power transfer device (10) requests the portable device (20) to transmit an identification information via the data communication link (32) to the power transfer device (10).

Abstract: A portable electrical device requiring periodic recharging mates with a corresponding charging device by dropping or placing the portable device on or in the charger without pre-alignment by the user. The charger-to-device interface self aligns the portable electrical device in the charger for charging. Preferably, the charger is a bowl-shaped cradle. The portable device sinks to the bottom of the bowl using the force of gravity and thus aligns the contacts for recharging. Optional magnets may provide additional force to guide alignment.

Abstract: An assembled battery according to the present invention has an aqueous secondary battery and non-aqueous secondary batteries having an individual battery capacity smaller than that of the aqueous secondary battery. The non-aqueous secondary batteries and the aqueous secondary battery are connected in series such that the polarities thereof are reversed, and charging and discharging are carried out based on the polarities of the non-aqueous secondary batteries.

Abstract: The present invention relates to an automatic charge equalization apparatus and method having an automatic PWM generating means for a series-connected battery string. The automatic charge equalization method and apparatus for a series-connected battery string according to the present invention can improve charge equalization by accomplishing charge equalization operation after comparing the potential of the corresponding battery cell with the average potential of the plurality of battery cells including the corresponding battery cell upon charging or discharging the corresponding battery cell.

Abstract: A two-stage charge equalization apparatus for a series-connected battery string comprises a battery module having a plurality of batteries connected in series; a battery string having M (M?2) battery modules connected in series; M charge control switch modules connected in parallel to each of the M battery modules; M second DC/DC converters connected to each of the M charge control switch modules; a single first DC/DC converter connected to the M second DC/DC converter; and a microprocessor controlling the charge control switch module, wherein the first DC/DC converter is inputted with an overall potential of the battery string and outputs a potential lower than the potential inputted and each of batteries composing the battery module shares the second DC/DC converter using the charge control switch module.

Abstract: It is an object to provide a battery system whose life can be extended. A cell pack having at least one lithium secondary battery that uses a manganese-based cathode material and a control unit that controls charging and discharging of the cell pack are provided, and the control unit controls charging and discharging within a low-degradation voltage range that is set on the basis of a target cell degradation rate.

Abstract: A charging controller connected to at least one of secondary cells and detachably connected to a charger or a cell driver, the charging controller including: a charging amount control circuit detecting a cell voltage of each secondary cell and outputting a charging control signal for instructing the charger to reduce a charging current when the detected cell voltage exceeds the target voltage; and a protection circuit detecting a cell voltage of each secondary cell and cutting off a current path from the charger to the secondary cell when the detected cell voltage exceeds the upper limit voltage, the protection circuit operating by using the secondary cell as a power source while at least the charger is not connected. In the charging controller, while neither the charger nor the cell driver are connected, the charging amount control circuit does not operate.

Abstract: A multi-cell protection circuit and method. The multi-cell protection circuit comprises one or more multi-cell protection chips, a charge control switch (M2) and a discharge control switch (M1). Each multi-cell protection chip comprises a multi-cell protection integrated circuit module and an expansion connection module. The input terminals (VC1, VC2, VC3, GND1, VC4, VC5, VC6, VC7, GND) of the multi-cell protection integrated circuit module are connected to the positive and negative poles of corresponding cells. The output terminals (co, do) of the multi-cell protection integrated circuit module are connected to the interior signal input terminals (Dco, Ddo) of the expansion connection module. The expansion signal input terminals (exterior.co, exterior.do) of the expansion connection module are connected to expansion signal output terminals (Co?, Do?) of an expansion connection module in a multi-cell protection chip adjacent to this multi-cell protection chip.

Abstract: The present invention relates to a charging method of a lithium ion secondary battery including, as a positive electrode active material, a lithium-containing composite oxide containing nickel and cobalt and having a layered crystal structure. The charging method includes a first step of charging the battery at a first current of 0.5 to 0.7 It until the charge voltage of the battery reaches a first upper limit voltage of 3.8 to 4.0 V; a second step of charging the battery, upon completion of the first step, at a second current smaller than the first current until the charge voltage of the battery reaches a second upper limit voltage greater than the first upper limit voltage; and a third step of charging the battery, upon completion of the second step, at the second upper limit voltage. This provides a charging method of a lithium ion secondary battery, the method capable of achieving both a shortened charging time and an improvement in charge/discharge cycle life characteristics.

Abstract: An electrical device (100) includes a housing (102), a battery receiving region (104), device electrical circuitry (112), an energy converter (110), and an energy limiter (108). The battery receiving region (104), the circuitry (112), the energy converter (110) and the energy limiter (108) are located within the housing (102). The energy converter (110) has an input dynamic range for supplied electrical energy and converts the energy to a level suitable for powering the device circuitry (112). The energy limiter (108) limits the supplied electrical energy.

Abstract: The present invention provides way to reserve power for electronic devices such as mobile devices. Specifically, under the present invention, a user can establish and/or change a setting/threshold corresponding to an amount of (battery) power available to the electronic device to be held in reserve. The setting can be a percentage of total available power (e.g., n %). Once set, this amount of power is held in reserve and is unavailable for use by the electronic device. Before to the total power available to the device is reduced to the amount of power set by the user (e.g., 1-n %), an alert will be issued. If the user wishes to use the power held in reserve, the user can input a previously established reserve power access code amount that will make the reserve power available to the electronic device.

Abstract: A self-discharge circuit for a secondary battery having a bare cell includes a self-discharge unit, both ends of which are connected to a positive electrode and a negative electrode of the bare cell. The self-discharge unit includes a switching device and a zener diode that are connected serially with respect to each other, and the zener diode is in an opposite direction to a discharge direction of the bare cell. A secondary battery including the self-discharge circuit is also provided.

Abstract: When the relation of battery temperature Tb1>battery temperature Tb2 is satisfied, a temperature increase request for a power storage unit becomes relatively large. Therefore, a target power value P2* for the power storage unit is determined with priority. The target power value P2* is calculated by multiplying the required power value Ps* by a distribution ratio Pr2 (0.5?distribution ratio Pr2?1.0) determined in accordance with temperature deviation between battery temperature Tb1 and battery temperature Tb2. The target power value P1* is determined by subtracting the target power value P2* from the required power value Ps*.

Abstract: An electrical vehicle charging station establishes a charging session with an electric vehicle which includes energizing a power receptacle in the charging station and receiving a charging cord at the power receptacle. While the charging session is established and responsive to detecting that a charging connection between the electric vehicle and the electric vehicle charging station has been unexpectedly disconnected, the power receptacle is de-energized to prevent electricity from flowing through the charging cord.

Abstract: The invention relates to a double-fed asynchronous generator, which is provided with a slipring rotor (1b), and to a method for its operation. In the normal manner, the asynchronous generator has a machine-side converter (5) and a network-side converter (6). According to the invention, the asynchronous generator is designed to supply short-circuit power in that at least one machine-side rotor current (iRM) is maintained in the event of a short circuit, in order to allow the formation of a stator-side short-circuit current. In order that inherent short-circuit currents in sensitive components of the converters (5, 6) are nevertheless avoided, at least the machine-side rotor current (iRM) is maintained in such a way that the actual rotor current (iRMact) in the event of a short circuit is used as the new nominal value in a control apparatus for the asynchronous generator.

Abstract: A high frequency starter-generator system uses an electric machine design that does not employ rotating rectifiers installed on the rotor. The output frequency of such a starter-generator is increased by about 200% as compared with a conventional starter-generator with the same number of poles operating in the same speed range. This design allows significant weight and volume reductions of the electric machine while its reliability is increased. The present invention may find application in any starter-generator application, including more electric architecture-type aircraft designs currently in development.

Abstract: To provide a voltage regulator having low current consumption. [Solving Means] In a case of a light load, activation currents flowing through NMOS transistors (22) and (25) to activate a voltage control circuit (92) become substantially zero, and hence the current consumption of the voltage regulator is reduced by a corresponding amount.

Abstract: A class DH amplifier is provided. The amplifier is generally comprised of a tracking power supply, a class D amplifier section, and a carrier generator. The tracking power supply receives a supply voltage and an analog input signal, and the tracking power supply provides an input for the carrier generator. Based on its input from the tracking power supply, the carrier generator can output a positive ramp signal and a negative ramp signal to the class D amplifier section. The class D amplifier section can generate an output signal base on the analog input signal and the ramp signals from the carrier generator.

Abstract: A power converting device including a pulse width modulation circuit, a switch unit, a power output unit and a voltage start unit is provided. The pulse width modulation circuit increases a start voltage in a soft start mode and is operated under the start voltage to generate a pulse width modulation signal. The switch unit is for receiving an input voltage, and forming a charge path and a discharge path alternately according to the pulse width modulation signal. The power output unit converts the input voltage to a core voltage in accordance with the charge path and the discharge path. The voltage start unit is for detecting the start voltage, and for transmitting a control signal to interrupt the formation of the discharge path when the start voltage is smaller than the core voltage.

Abstract: An apparatus for and method of automatically tuning a voltage regulation control loop for a digitally controlled switch mode power supply is provided. The method includes determining a frequency response of the power stage and calculating an open loop transfer function from the frequency response. A correlated metric is defined based at least in part on the open loop transfer function, wherein the correlated metric is correlated to an expected disturbance in regulated output voltage from the digitally controlled switch mode power supply due to a change in load. New values for the open loop transfer function are calculated for a range of controller compensation parameters to minimize the correlated metric. These values are then applied to the digital controller for use in controlling the power supply.

Abstract: Provided is an output buffer circuit capable of reducing output noise, and increasing a response speed. In a case where an output voltage changes from a ground voltage to an inversion voltage of NOR, and a case where the output voltage changes from a power supply voltage to an inversion voltage of NAND, both of two MOS transistors control the output voltage, and hence, a slew rate of the output voltage becomes steep. Thus, a response speed of the output buffer circuit becomes high. Further, in such a case where the output voltage changes in the vicinity of a voltage (VDD/2) other than the above-mentioned cases, only one MOS transistor controls the output voltage, and hence, the slew rate of the output voltage becomes gentle. Thus, a response speed of the output buffer circuit becomes low, which reduces output noise.

Abstract: An input protection circuit (IPC) may prevent an input signal from propagating into a system, such as an integrated circuit (IC), when the voltage level of the input signal exceeds a specified value. The IPC may be configured to compare the input signal voltage, which may be that of an external input signal received by the system, with a reference voltage, which may be the power supply voltage. If the input signal voltage exceeds the reference voltage, the output of the IPC may be set to the value of a specified clamp voltage. If the input signal voltage does not exceed the reference voltage, the output of the IPC may track (or follow) the input signal voltage. For certain integrated circuits, the IPC may be configured to provide circuit protection for an input signal voltage ranging between 0V to 5V, and a power supply voltage ranging between 3.0V and 3.6V.

Abstract: A circuit includes an operational amplifier including a first input and a second input. A first resistor has a first end coupled to the first input. A first bipolar transistor includes a first emitter coupled to a second end of the first resistor, and a first base. A second bipolar transistor includes a second emitter coupled to the second input, and a second base. A third bipolar transistor includes a third emitter coupled to the first base, a first collector, and a third base connected to the first collector. A fourth bipolar transistor includes a fourth emitter coupled to the second base, a second collector, and a fourth base connected to the second collector. A second resistor is coupled to the first input, wherein the second resistor is parallel to the first resistor and the first bipolar transistor.

Abstract: A switching frequency setting unit sets switching frequency of a switching element, based on both the temperature of a cooling medium which cools a DC-DC converter and the temperature of a switching element of the DC-DC converter. A switching controller controls the voltage conversion ratio of the DC-DC converter by controlling switching operation of the switching element at the set switching frequency.

Abstract: A motor drive cabinet in an on-load tap-changer, including an electric motor drive unit and a control unit. The electric motor drive unit includes an electric motor, a gearbox and a position transmitter. The control unit is arranged to control an outgoing axis outgoing from the motor drive cabinet by feeding the electric motor through direct connection to drive the outgoing axis through the gearbox. The position transmitter is arranged to detect movement and position of the outgoing axis and to provide indications thereof to the control unit. The motor drive cabinet is sealed during use with the electric motor drive unit and control unit within the sealing.

Abstract: The present invention relates to a variable-electric-power self-regulating cable exhibiting PTC behaviour, to a specific connector therefor, to a device comprising said cable and said connector, and to the use of said device to generate variable electric power using a single cable.

Abstract: A current branch circuit is electrically coupled with a Faraday cup and an operation amplifier separately. The Faraday cup, the current branch circuit and the operation amplifier are formed as a portion of an ion implanter. When the Faraday cup is electrically coupled with a ground through a conductive structure formed by an ion beam received by the Faraday cup, a current flows from the output of the operation amplifier to the current branch circuit to balance another current flow from the current branch circuit through the Faraday cup to the ground. By dynamically monitoring the voltage of the output of the operation amplifier, current flows through the Faraday cup to the ground and through the resistance of the conductive structure can be dynamically monitored. Accordingly, the difference between the ion current measured by the Faraday cup and the real ion current implanted to the wafer can be dynamically acquired to avoid overdosage of the wafer with the ion beam.

Abstract: Resonant sensors, preferably having floating bilayer symmetry, and their methods of use is determining the presence, amount or binding kinetics of an analyte of interest in a test sample are disclosed. The test sample may be a liquid or gas.

Abstract: An ammeter is provided with a plurality of individual wound coils interconnected in a generally U-shaped array to measure the magnitude of current in a conductor extending through a sensing region inside the U-shape. Additional pairs of position-sensing coils determine the position of the conductor relative to the sensing region and provide outputs to circuitry which permits the magnitude measurement to be displayed only if the conductor extends through the sensing region.

Abstract: A meter for measuring electric power consumed by a plurality of branch circuits includes interchangeable current transformers including respective transformer memories for storage of transformer characterization data and enables self-discovery of a phase shift induced by respective current transformers and the phase of current conducted by each branch circuit.

Abstract: Provided is a power supply control apparatus including an overcurrent detection circuit with enhanced overcurrent detection accuracy. A power supply control apparatus according to the present invention includes: an output transistor Q1 that controls a current to be supplied to a load; a voltage control circuit that applies a control voltage to a control terminal of the output transistor Q1; and an overcurrent detection circuit. The overcurrent detection circuit includes: a detection MOS transistor Q2 that generates a detection current according to a current flowing through the output MOS transistor Q1; a transistor 9 that generates a current Iref1 based on a bias signal BS1; a transistor 10 that generates a current Iref2 based on a bias signal BS2 that is different from the bias signal BS1, the transistor 10 having a size that is the same as that of transistor 9; and a current mirror circuit that outputs an overcurrent detection signal based on the current Iref1, the current Iref2 and the detection current.

Abstract: Method of quantifying an analyte in a liquid medium by means of magnetic particles functionalized by specific ligands of the analyte being quantified, consisting in applying a magnetic field to a liquid medium for a time period several times shorter than that of the reaction between the analyte being quantified and the ligands of the magnetic particles, in measuring the optical density of the liquid medium after applying the magnetic field, in repeating this cycle of applying the magnetic field and of measuring the optical density several times over the duration of the reaction between the analyte and the ligands, in calculating, by extrapolation, a limiting value for the optical density for an infinite magnetic field application time and in deducing therefrom the concentration of the analyte in the liquid medium.