Abstract: A brushless D.C. motor wherein one of projected stator poles positioned to be mutually equally spaced in mechanical angle is made sufficiently smaller than the other as partly cut off at circumferentially expanding pole tooth part, the stator poles being respectively polarized depending on controllably varied direction of direct current to coils on the poles by means of a rotor position detecting Hall element which detects the polarity at a predetermined position of the rotor, for allowing the rotor to self-start constantly in one direction with a remarkably increased starting torque.

Abstract: A propulsion control system for motor vehicles in the range of the cornering limit speed, having a memory in which the momentary steering angle value is stored when a certain steering angle change is not followed by a change of the lateral acceleration, having threshold value comparators in which the actual steering angle is compared with threshold values that depend on the stored steering angle value, and having logic for transmitting and stop transmitting a signal to a control element for the power reduction of the vehicle engine when the actual steering angle exceeds one threshold value and then falls below the other threshold value. The steering angle may also be replaced by the driving speed or by a combination of both quantities.

Abstract: A standby power supply arrangement comprises a transistor with its emitter coupled to one pole of a standby battery and its collector coupled to a load. The transistor base is coupled to the other pole of the battery by way of a threshold device. When the battery voltage falls below a given limit, the threshold device no longer conducts, causing the transistor to cease to conduct power to the load.

Abstract: A transport and stacker system in which the articles being transported are propelled in their path of travel by the moving magnetic field of a linear induction motor. The magnetic field also functions to attract the moving articles toward the linear motor and in order to overcome this attracting force and air bearing is provided. The air pressure acting against the attracting force is just sufficient to move the articles a slight distance away from the linear induction motor so that the articles move in the path of travel while suspended in air out of contact with the physical surface of the motor. When the desired position is reached, the article is dropped on a stack by deenergizing the magnetic field.

Abstract: A disk-type brushless motor comprises a 2p-pole magnet rotor (p represents an integer of 2 or more) having alternating N and S poles and a single position sensor element. A stator armature having an armature coil is formed on two conductors which contribute to the generation of torques and extend with an opening angle substantially equal to the width of each magnetic pole of the magnet rotor. A projection such as a screw for generating cogging to enable the self-start of the magnet rotor is disposed at a place somewhere short substantially by a widthPw4+n.multidot.PwwhereinPw is a width per pole of the magnet rotor, andn is a positive integer of 1 or more,from the conductor which contributes to the generation of torques toward the rotational direction of the magnet rotor.

Abstract: Apparatus and method for controlling a variable speed wind turbine-generator at improved efficiencies is disclosed. The method and apparatus of the invention control the rotor tip speed below the limiting torque of the wind turbine at a selected constant velocity ratio with respect to wind speed and, above the limiting torque, control the rotor tip speed at speeds greater than those dictated by the constant velocity ratio up to a speed or power limit. This may be accomplished by controlling tip speed above the point where limiting torque is attainable to maintain optimal wind turbine performance along the performance envelope.

Abstract: Electronic system grounding includes two system grounding paths for card cage electronic modules, with a first grounding path through the card cage and a second grounding path through the system power supply. The two system grounding paths are used to minimize noise and reduce unwanted induced superimposed transient voltage levels.

Abstract: A reserve power source, switchably connected to a network between a primary power supply and a load, provides an auxiliary power signal to the load when a power failure condition is detected in the signal from the primary power supply. The reserve power source includes a circuit for instantaneously detecting and switching upon the occurrence of a power outage. An overvoltage/noise detector circuit is included to detect when either a sustained overvoltage condition or a high, short duration overvoltage condition occurs. A low voltage detector circuit is included for detecting a low voltage, or brown-out, condition. When an overvoltage or low voltage condition is detected, a preferred embodiment of the invention switches the load to the auxiliary power signal within one-half cycle of, but in zero-crossing synchronization with, the primary power signal.

Abstract: A power supply system for a quadrupole mass spectrometer includes an RF (radio frequency) power source for generating RF voltages and a voltage divider functioning as a DC (direct current) voltage generating circuit. This voltage divider divides the RF voltages and then rectifies them so as to derive DC voltages while maintaining a proportional relationship to the RF voltages. Thereafter, the DC voltages are superimposed on the RF voltages. The resultant voltages are applied to the electrodes of the quadrupole mass spectrometer.

Abstract: A power source for a starter motor comprising a frame, a hand crank rotatably connected to the frame, a flywheel generator connected to the hand crank, and power transmission electrically connected to the flywheel generator so as to transmit energy to a starter motor. The flywheel generator comprises a flywheel connected to the hand crank, a permanent magnet fixedly attached to the flywheel, and a stator winding mounted to the frame. The stator winding is electrically connected to the power transmitter. The power transmitter includes a rectifier bridge electrically connected to the flywheel generator and connector leads for connecting the rectifier bridge to terminals associated with a starter motor. A gear train is arranged within the frame so as to transmit a greater rate of rotation to the flywheel.

Abstract: A rain sensor for selectively supplying power from a constantly available power source to a wiper means (14) to remove moisture from a vehicle window (12) when moisture has collected. A passive circuit (18) is supported on the window (12) and has an initial self-resonant frequency to sense moisture. A generating means (20,120) creates an electromagnetic field having a range of frequencies wherein the initial self-resonant frequency is within the range of frequencies. An moisture collects about the passive circuit (18), the resonant frequency of the passive circuit (18) shifts away from the initial self-resonant frequency, indicative of less coupling with the generating means (20,20). A detector (28,128) detects the coupling between the passive circuit (18) and the generating means (20,120) to actuate the wiper means (14) by a control means (30,130) when a predetermined decoupling magnitude is exceeded.

Abstract: A magnetic disc head positioning system using a stepper motor eliminates positioning errors due to different approach directions and distances to a target track position through a drive control of temporarily stopping the head at a position immediately preceding or following the target track depending on the approach direction and, thereafter, moving the head from this position to the target track with a constant transient response. The head is brought to the temporary stop position by utilizing the overshooting response of the stepper motor so as to minimize the positioning time.

Abstract: A stepping motor including a plurality of stator poles wherein the stator poles are non-symmetrically displaced from their normal position to reduce harmonics in the torque/displacement crossing of the motor.

Abstract: A brushless DC motor employs a set of coils positioned around the motor axis to respond to an aximuthal pattern of changing eddy current sensitivity. Rf voltage is frequency-multiplexed on the motor power leads at a frequency that does not affect motor operation. Rf voltage measurement circuits located remotely from the motor respond to the changing coil impedance to generate signals representing the azimuthal position of the motor rotor, that control a set of commutation circuits.

Abstract: An apparatus for controlling the parallel operation of a commercial power source and an A-C output converter in which the A-C output converter of a variable voltage and a variable frequency is connected and operated in parallel with the commercial power source; an impedance element is provided between said commercial power source and an output terminal of at least one phase which represents an internally generated voltage of the A-C output converter, the impedance element being connected in parallel with an output impedance of a main circuit of the A-C output converter, and the voltage and frequency of the A-C output converter being controlled so that a current that flows through said impedance element assumes a predetermined value.

Abstract: A motor servo system is disclosed which is capable of accomplishing the precise control of a set point of a mechanical element to be controlled without particularly considering the mechanical connecting condition between a motor and the mechanical element and being readily accommodated to a variation of the set point and a variation of overshoot due to a variation of load. The motor servo system is constructed in a manner such that a controlled set point of a controlled element such as a mechanical element is independently set by means of a time signal generating section preceding a servo circuit section.

Abstract: A touch operated electronic switch for alternating current including a full wave rectifying bridge and two unidirectional current electronic switches one being mounted in parallel with said bridge input and the other being mounted in parallel with said bridge output, each unidirectional current electronic switch being such a silicon controlled rectifier which can be triggered by a touch plate. Said bridge input poles are the two external connections of said A.C. switch. Said unidirectional current electronic switch inserted between said bridge output poles is combined with a low inertia accumulator of electrical energy such as a capacitor mounted in parallel or an inductance mounted in series therewith. A device comprising a neon indicator and its dropping resistor is mounted in parallel with said bridge input so as to faintly light in transparency the touch operated electronic switch for A.C. when it is turned off.

Abstract: An alternating current power source, which is to provide an auxiliary alternating power signal output to a load after switchover from a primary power signal, includes a phase switching circuit which causes the auxiliary power signal to immediately switch phases when a phase imbalance is detected between the primary power signal which existed immediately prior to switchover and the reserve power signal which exists immediately after switchover. In a preferred embodiment the circuit includes a diode and capacitor serially connected between a shutdown output and a synchronizing input of a pulse width modulator integrated circuit.

Abstract: A frequency divided pulse is produced by frequency dividing a clock signal by speed instruction data. When the current position of the pulse motor has not yet reached a set desired position, a frequency divided pulse is outputted as a forward rotation control pulse. When the current position has exceeded said set position, a frequency divided pulse is outputted as a reverse rotation control pulse. If the set desired position is changed while the pulse motor is rotating, this change of setting is detected and the output of the frequency divided pulse is inhibited for a predetermined settling period of time, thereby stopping the pulse motor. After the vibration of the rotor which occurs during the stepping of the pulse motor is settled, the reverse rotation of the pulse motor can be started, thereby preventing the occurrence of the step-out phenomenon of the pulse motor upon reverse rotation.

Abstract: An electret transducer is comprised of a motor and signal processing apparatus, that may include an amplifier and/or impedance matching means, disposed within a sealed conductive housing. The motor is fabricated in place within a housing and the signal processing means is mounted on the underside of the cover for the housing so that each may be independently tested prior to combining into a unitary structure. The motor is comprised of easily fabricated and assembled components that include means for spacing a backplate from the walls of the conductive housing and a spacer intermediate the backplate and the center of a diaphragm. The backplate and the diaphragm are provided with registering apertures. The amplifier is mounted to the cover to conductively connect to the housing and to provide rigid outwardly extending terminals for ready connection to further electrical circuits, as in a hearing aid.