Abstract: A second energy storage is superior to a first energy storage in energy to weight density and inferior to the first energy storage in power to weight density. A booster is to boost a first voltage output from the first energy storage. A motor is to be driven by power output from at least one of the first energy storage and the second energy storage. A controller is to control the booster to operate in a first mode while a voltage point is within a referenced closed region and to operate in a second mode while the voltage point is outside the referenced closed region. The voltage point represents a relationship between the first voltage and a second voltage output from the second energy storage in a two-dimensional coordinate system having a first axis representing the first voltage and having a second axis representing the second voltage.

Abstract: A method for determining parameter values of an induction machine. The method may be executed by a dedicated computer system. The method includes sampling a voltage signal, a current signal and a rotational speed signal of the induction machine at the time the induction machine is started, calculating a resistance and a reactance of the induction machine at each of a plurality of slip rates according to the voltage signal and the current signal, calculating a plurality of coefficients of a polynomial fraction based on the resistances and the reactances, calculating the parameter values of an equivalent circuit according to the plurality of coefficients of the polynomial fraction, calculating a moment of inertia and a friction coefficient of the induction machine according to the calculated parameter values and the rotational speed signal of the equivalent circuit, and outputting the moment of inertia and the friction coefficient of the induction machine.

Abstract: A motor is to be driven with power supplied from at least one of a first energy storage and a second energy storage. The booster is to boost a first voltage output from the first energy storage such that the first voltage and a second voltage output from the second energy storage satisfy a first condition, a second condition, and a third condition. In the first condition, the second voltage does not exceed a withstand voltage limit of the motor. In the second condition, the second voltage is lower than or equal to a maximum boosted value to which the booster boosts the first voltage with a maximum boosting ratio. In the third condition, the second voltage is higher than or equal to a minimum boosted value to which the booster boosts the first voltage with a minimum boosting ratio.

Abstract: A system, in one embodiment, includes a drive having a housing, a stator disposed in the housing, a rotor disposed in the stator, and a programmable logic controller disposed inside, mounted on, or in general proximity to the housing. In another embodiment, a system includes a network, a first motor having a first integral programmable logic controller coupled to the network, and a second motor having a second integral programmable logic controller coupled to the network. In a further embodiment, a system includes a rotary machine having a rotor and a stator disposed concentric with one another, a microprocessor, memory coupled to the microprocessor, a power supply coupled to the microprocessor and the memory, and a machine sensor coupled to the microprocessor.

Abstract: The invention relates to an electromotive furniture drive (100) for adjusting a movable part (4, 5) of a piece of furniture (1) by means of an output element, comprising a) at least one adjusting drive (7, 8) with respectively at least one electric motor, a speed reducing mechanism which is coupled thereto and which ensures that the output element is drivenly coupled and can be linearly displaced and/or rotatably moved, and when said output element reaches a predetermined position, said output element actuates an end switch and/or reference switch and/or switching means, b) at least one control device (9) and c) at least one control unit (10), said control device (9) comprising a positioning device for the output element provided with a control block with a counter and a recording device for evaluating impulses of a counter EMK of the at least one electric motor.

Abstract: A power tool includes a motor, a drive unit driven by the motor, and a trigger switch and a forward-reverse switch each operable by a user. The trigger switch is switchable between an activation state and a deactivation state. The forward-reverse switch switches a motor rotation between forward and reverse. The power tool also includes a control unit that drives the motor based on operation of the trigger switch and allows switching of an operation mode of the power tool between first and second modes. In the first mode, the motor rotation is switched to that selected by the forward-reverse switch. In the second mode, when the activation state is switched to the deactivation state, the motor rotation is switched so that the motor is driven in a direction opposite to the present rotation direction when the trigger switch is activated next.

Abstract: A motor control system include an inverter configured to convert boosted direct-current electric power output from a boost converter to alternating-current electric power and supply the alternating-current electric power to an alternating current motor, and a control unit configured to adjust boosted voltage of the boost converter. The control unit includes an optimal boosted voltage map which defines optimal boosted voltage for operating the alternating current motor with a required number of revolutions and required torque, and a boosted voltage changing program that sets boosted voltage of the boost converter to a voltage which is higher than an optimal boosted voltage when the carrier frequency is a predetermined threshold value or lower.

Abstract: In an apparatus, a combination unit selects one of three-phase currents flowing in a three-phase alternating-current rotary electric machine. The combination unit shifts the captured values of at least one of the remaining two phase currents other than the reference phase current by 120 electrical degrees. The combination unit combines the shifted captured values of the at least one of the remaining two phase currents to the captured values of the reference phase current to obtain combined values of the reference phase current. A coefficient calculator integrates, for each of the calculation angles, function values based on the combined values of the reference phase current over the at least one period of the electrical angle of the three-phase rotary electric machine to calculate a Fourier coefficient for the reference phase current.

Abstract: In a method for ascertaining a commutation angle in a permanently excited synchronous motor, the commutation angle indicates the position of a rotor within a magnetic period of the synchronous motor and is used for the field-oriented energization of the synchronous motor. The method includes the steps of specifying a random commutation angle as starting point of the method, impressing a current vector into the motor using the initially randomly specified commutation angle, ascertaining a positional deviation of the rotor, varying the commutation angle used for the energization with the aid of a controller structure in order to counteract the ascertained positional deviation, so that the commutation angle that comes about after a stabilizing period corresponds to the actual commutation angle of the rotor, an initial speed of the rotor being taken into account when ascertaining the positional deviation of the rotor.

Abstract: An exemplary electrical converter includes a plurality of semiconductor switches. The electrical converter is configured for generating a two-level or multi-level output voltage from an input voltage by switching the plurality of semiconductor switches. A method for controlling the electrical converter includes receiving a reference electrical quantity (iS*) and an actual electrical quantity (iS), determining a sequence of future electrical quantities of the electrical converter from the actual electrical quantity, determining a maximal cost value based on the sequence of future electrical quantities, and iteratively determining an optimal switching sequence for the electrical converter. A switching sequence includes a sequence of future switching states for the semiconductor switches of the electrical converter. The method also includes selecting the first switching state of the optimal switching sequence as the next switching state (u) to be applied to the semiconductor switches of the electrical converter.

Abstract: The invention relates to an electrical drive system having: an energy storage device for generating a supply voltage and having at least one energy supply line, with one or more energy storage modules connected in series in the energy supply line, each module comprising an energy storage cell module with at least one energy storage cell and a coupling device with a plurality of coupling elements which is designed to selectively connect the energy storage cell module into the respective energy supply line or to bypass the same in the respective energy supply line; a fuel cell system which is coupled to the output terminals of the energy storage device and connected in parallel to the energy storage device; and a control device which is coupled to the energy storage device and is designed to control the coupling devices of the energy storage modules in order to adjust a supply voltage at the output terminals of the energy storage device which corresponds to an output voltage of the fuel cell system.

Abstract: A hinge and an electronic device are provided according to the present application. The hinge includes a spindle, a spindle sleeve arranged with respect to the spindle, and a first material with a variable state arranged between the spindle and the spindle sleeve, and a torsion of the spindle is variable according to the variable state of the first material. The electronic device includes the hinge, a first body and a second body; and the first body and the second body are rotatably connected via the hinge.

Abstract: A method (29) for controlling a synchronous reluctance electric motor (2) is suggested, wherein the electric voltage (7) that is applied to the synchronous reluctance electric motor (2) is controlled, and wherein the control of said electric voltage (7) is based on the electric current (14) in the d-q-reference frame (25, 26).

Abstract: A method for controlling an electric motor (such as a synchronous reluctance electric motor) is suggested, in which the torque angle in the d-q-reference frame is at least in part and/or at least at times varied depending on at least one working condition of the electric motor.

Abstract: Displacement devices comprise a stator and a moveable stage. The stator comprises a plurality of coils shaped to provide pluralities of generally linearly elongated coil traces in one or more layers. Layers of coils may overlap in the Z-direction. The moveable stage comprises a plurality of magnet arrays. Each magnet array may comprise a plurality of magnetization segments generally linearly elongated in a corresponding direction. Each magnetization segment has a magnetization direction generally orthogonal to the direction in which it is elongated and at least two of the magnetization directions are different from one another. One or more amplifiers may be connected to selectively drive current in the coil traces and to thereby effect relative movement between the stator and the moveable stage.

Abstract: A driving component for robot can include a communicating module configured to receive control signals, a motor, a controller coupled to the communicating module and configured to drive the motor according to the control signals received by the communicating module, a sensor configured to detect environment and providing detected results to the controller, a battery configured to provide electric power to the communicating module, the motor, the controller and the sensor, and a housing containing the communicating module, the motor, the controller, the sensor and the battery. The housing can include a coupling structure configured to couple to another driving component.

Abstract: A system for controlling a damper, comprising an energy harvesting device is disclosed. A voltage conditioning and storage unit coupled to the energy harvesting device, the voltage conditioning and storage unit configured to apply overvoltage and undervoltage protection to a storage capacitor. A controller coupled to the voltage conditioning and storage unit, the voltage conditioning and storage unit configured to apply overvoltage protection to the controller.

Abstract: An electric vehicle accomplishes speed changes through the use of electronically controlled, multiple electric motor configurations that are coupled to an output drive shaft instead of a speed change transmission. A parallel-coupled motor configuration includes at least two motors that are each coupled to the output drive shaft through respective gear arrangements, each gear arrangement having a respective gear ratio. In a serially-coupled motor configuration, the stator of the second motor is coupled to the rotor of the first motor, where the rotor of the second motor is coupled to the output drive shaft. The required torque to reach or maintain a desired vehicle speed can be obtained by selective energization of either one or both of the motors (in both multi-motor configurations). Two motors are also coupled to a differential gear so that the rotational speed contributed by both motors are additive at the output shaft.

Abstract: A brushless D.C. motor has a rotor with a plurality of magnets secured to a mounting surface. Each magnet has an RF transmitter secured to a magnet surface, with each RF transmitter having stored therein a unique identification character serving to identify the magnet. A transmitter power generator having several coils mounted on the rotor and a power conditioning unit supplies power to the transmitters, which continuously broadcast their identification character. A stator has a plurality of pole teeth separated by slots, each pole tooth having a power coil wound thereabout. A plurality of RF receiver antennae are mounted adjacent the pole teeth each coupled to a different RF receiver. The position and magnet identification information received by the RF receiver is processed and coupled to a microprocessor, which extracts the information and sends it to a motor controller and driver unit, which supplies operating power to the individual power coils.

Abstract: A multi-phase motor control apparatus that reduces the occurrence of the vibrations and the noises by setting the shift amount per time more finely after realizing a reduction in processing ability of a CPU by using a one-shunt type current detection circuit and an electric power steering apparatus using the same. The apparatus includes a PWM-signal generating section that generates plural second each-phase PWM-signals within two control periods based on the current estimation value and the carrier signal, and in a case that a phase shift amount of a predetermined phase in a just before control period is zero and a phase shift amount of a predetermined phase in a present control period is not zero, the phase shift control section gradually increases the phase shift amount from zero in the present control period and a next control period, and uses the second each-phase PWM-signals in the next control period.