Abstract: Provided is a motor having a combination of a plurality of coil pairs and a permanent magnet, wherein these coil pairs are supplied with an excitation signal from a drive circuit so as to be excited at alternate opposite poles, and the permanent magnet is constituted such that the plurality of polar elements is disposed to become alternating opposite poles; the drive circuit is constituted to supply an excitation signal having a prescribed frequency to the coil pairs, and relatively move the coil pairs and permanent magnet with the magnetic attraction repulsion between the coils and permanent magnet; and the drive circuit is constituted to supply to the coil pairs a waveform signal corresponding to the pattern of the back electromotive voltage to be generated in accordance with the relative movement between the coil pairs and permanent magnet.

Abstract: Control over velocity of a model train may be determined based upon the speed of rotation of a control knob. A processor receives electronic pulses indicating rotation of the knob beyond a predetermined increment of angular distance. The processor calculates the amount of power ultimately conveyed to the model train based not only upon the number of pulses received, but also upon the elapsed time between these pulses. The shorter the elapsed time between pulses, the greater the change in power communicated to the train. Initially, a user can rapidly rotate the knob to attain coarse control over a wide range of velocities, and then rotate the knob more slowly to achieve fine-grained control over the coarse velocity. Utilizing the control scheme in accordance with embodiments of the present invention, in a compact and uninterrupted physical motion, a user can rapidly exercise both coarse and fine control over velocity of a model train.

Abstract: Presence/absence of a failure in a feedback control system of a motor is monitored. When a failure is detected in the feedback control system, the motor is driven by switching to an open-loop control. During the open-loop control, the motor is rotated by sequentially switching the motor current supply phase without feeding back encoder count information. The position count is incremented or decremented every time the current supply phase is switched. When the position count has reached a target count, it is determined that the rotor has reached a target position, whereupon the open-loop control is finished.

Abstract: An apparatus for processing a signal output by an encoder, including a frequency multiplication unit to repeatedly multiply each of frequencies of two sinusoidal signals with a phase difference of approximately 90 degrees by a predetermined number a predetermined number of times; a converter to convert each pair of the two frequency-multiplied sinusoidal signals into square wave signals; and a processor to receive the square wave signals and count a number of rising and/or falling edges of the square wave signals in order to determine and control a position of an object to be controlled.

Abstract: A drive system for a three phase brushless AC motor that is operative to optimize a transistor switching pattern to improve power output while allowing current measurement in all of the phases using a single sensor. This is achieved by defining a voltage demand vector where more than two states are required to meet a minimum state time requirement determined by the single sensor and calculating three or more state vectors that produce the demand vector while still allowing single current sensing.

Abstract: An object of the invention is to provide a break detection method capable of lessening a delay of motor power line break detection. According to the invention, in a motor power line break detection method of an AC servo driver including a current detector and a torque controller, a torque current component 9 is extracted from a three-phase AC detected by current detector 4, 5, a comparison is made between a torque command 1 and the torque current component 9, and if the difference between the torque command and the torque current component exceeds a setup value 21, it is recognized that a motor power line is broken.

Abstract: The invention concerns a system for electrically regulating a power transmission device between the heat engine and a pair of electrical machines and the drive wheels of a motor vehicle, the heat engine being connected to the two electrical machines via a mechanical assembly, while an electrical connection device located between the two electrical machines provides a direct passage for power from one machine to the other, the connection transferring electric power between the two electrical machines being carried out via two static converters connected to a bus whereof the two lines are connected to a bus whereof the two lines are connected by a capacitor. The invention is connected by a capacitor.

Abstract: A motor driving apparatus for driving a motor includes a single-phase rectifier circuit having an input connected to a single-phase AC power supply, an inverter circuit that is connected to the single-phase rectifier circuit and applies a current and a voltage to the motor, and an inverter control unit for controlling the inverter circuit. The inverter control unit controls the current applied to the motor, i.e., the output of the inverter circuit, so that the inverter input voltage becomes equal to the absolute value of the voltage of the single-phase AC power supply.

Abstract: The maximum frequency and the minimum frequency are extracted from frequencies corresponding to respective axle speeds. The minimum frequency is subtracted from the maximum frequency to achieve a first frequency deviation, and also the first frequency deviation is input as a primary delay system to achieve a second frequency deviation. Furthermore, the second frequency deviation is subtracted from the first frequency deviation to achieve an idle running detection setting deviation, and also an idle running detection set value for judging the idle running of the wheels at the frequency level is achieved. The idle running frequency deviation and the idle running detection set value are compared with each other to output an idle running detection signal, and also a torque correction amount of an AC electric motor is calculated on the basis of the idle running detection signal.

Abstract: A container includes a fan that is reversible so air can be removed from the container as a flexible bag is placed into the container and ambient air can be forced into the container when the flexible bag is being removed from the container. This will facilitate placement and removal of a flexible bag in and from the container.

Abstract: An electric motor control system includes a housing and a motor disposed within the housing. The electric motor control system also includes an actuator operatively coupled to the motor and configured to operate in response to an operation of the motor. The electric motor control system further includes a controller disposed within the housing and communicatively coupled to the motor. The electric motor control system also includes a first electric conductor communicatively coupling the motor to the controller, wherein the controller is configured to supply power to and communicate a data signal with the motor over the first electric conductor.

Abstract: This invention provides a lens system for a loudspeaker. The loudspeaker may include a driver unit and a waveguide attached to the driver unit. The loudspeaker further may include a lens system. The lens system may include a plurality of plates. The plates may be positioned to divide an interior of the waveguide into a plurality of acoustic paths of substantially equal length. The acoustic paths may bend the propagation of one or more acoustic elements of a sound wave so that each acoustic element arrives at a plane substantially at the same time.

Abstract: Electronic control system for an actuation device of operating groups of a vehicle comprising an electronic gearcase that allows the activation and deactivation of said at least one device to be managed. The gearcase defines a first operating condition of the selective actuations defined as rest, a second condition defined as block and a third condition defined as transitional, which is a passage step between the other two conditions.

Abstract: A Motor driving apparatus adjusts activation start timing of high-side activation control signals UU, VU, WU and the low-side activation control signals UL, VL, and WL with a state determination signal SJ in an activation controller 40, in the period from starting to the time when rotor rotating speed reaches a predetermined value, sets the activation start timing earlier than in normal times to perform leading phase activation control, and in normal times when the rotor rotating speed is a predetermined value or more, controls activation start timing in efficient and optimum phase. Hence, the motor driving apparatus can carry out stable PWM sensorless starting without any starting failure such as oscillation, loss of synchronism and reverse rotation and shorten starting time.

Abstract: A field-adjustable motor control system includes a motor, an inverter coupled to provide energization to the motor, a controller coupled to the inverter, and a field adjustment circuit that provides field adjustment signals to the controller. The controller provides signals to control the output of the inverter in response to received input control signals and field adjustment signals. The input control signals define the controller's operating state that corresponds to a desired system operating state. The field adjustment signals and input control signals define a desired output parameter of the inverter for an operating state. In certain embodiments, fail-safe circuitry is also provided that includes a relay receiving controller signals. The relay's input is coupled to a line power and to the inverter output. The relay's output is coupled to the motor. If the controller fails, the relay couples the line power to the motor.

Abstract: A motor-driving circuit drives a plurality of motors of different types. The motor-driving circuit includes a plurality of H-bridge circuits for outputting driving signals to the motors, a controller for controlling the plurality of H-bridge circuits, a setting section for setting up the controller, and terminals for inputting setting data.

Abstract: A switched reluctance machine is energized by phase circuits with four active switches, for example MOSFETs, arranged in a bridge configuration. The switches are capable of conducting current in both a first direction and a second direction and are capable of operating as a diode. The direction of current flow through the phase winding is reversed when changing from motoring to generating and from generating to motoring. The ratings of the switches are set in accordance with the energy supply and energy return currents.

Abstract: A method of and apparatus for controlling an electric machine. The method can include using a controller to detect whether power is present at a first node of the controller, detect whether power is present at a second node of the controller, generate at least one signal based at least in part on the detection, and energize the electric machine using a detected power when the at least one signal indicates power is present at at least one of the first node, the second node, and a combination of the first node and the second node.

Abstract: A laser level with a sensorless DC motor controller having a feedback sampling circuit connected in parallel with the coil to sense back EMF. An integrator provides a feedback signal from the sensed back EMF, which the amplified difference from a reference level is used as a pulse width control signal. A pulse width modulation generator uses the control signal to generate variable “on” time pulse widths for each motor drive pulse such that high resolution is provided to the DC motor, permitting accurate rotor position at low rotational speeds. It is emphasized that this abstract is provided to comply with the rules requiring an abstract to allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that is will not be used to interpret or limit the scope or meaning of the claims.

Abstract: A circuit configuration for supplying the control electronics in an electrical machine is specified, which includes a passive transformer circuit, which is powered by a phase current IP of the electrical machine and which generates an auxiliary voltage VA that is used for supplying the output stage of the electrical machine if no battery is present or if the battery is defective or discharged.