Abstract: A high efficiency automotive electrical system and method of control employing an asynchronous induction machine for performing both starting and generating functions. The induction machine is coupled to the engine through a bimodal gearset which operates as a reduction drive during the starting mode and as a direct drive during the generating mode. A computer-based controller responsive to the battery voltage and the speed of the induction machine maintains given voltage/frequency ratios during both starting and generating to provide efficient operation, and smoothly controls the transition between starting and generating modes. The vehicle electrical loads are supplied at one or more stable voltages produced by a load converter powered by the battery.
August 1, 1988
Date of Patent:
November 28, 1989
General Motors Corporation
Leroy E. Lakey, David A. Peter, David A. Chance, Stephen W. Anderson
Abstract: The invention relates to a method and means for determining the position of an elevator car on the principle of floor selection by means of a pulse train, whereby the position of the elevator car is determined on the basis of a pulse count indicating the elevator's speed. The achieve a more reliable pulse count based floor selection system which is suited for use with any type of elevator, the pulses required for calculating the elevator position for floor selection are obtained from an acceleration sensor placed on the elevator car, the output signal of which is integrated so as to obtain a voltage representing the speed of the elevator car, said voltage being converted into a pulse train whose frequency is dependent on the speed of movement of the elevator car.
May 26, 1988
Date of Patent:
November 14, 1989
Kone Elevator GbmH
Matti Kahkipuro, Heimo Makinen, Jouko Perttula
Abstract: There is disclosed a combined heat and power system for a building having a heat demand comprisinga primer moveran electrical generator, adapted to provide building power, the said prime mover being drivingly connected theretoa heat recovery arrangementsaid heat recovery arrangement being connected to the prime mover and recovering heat therefrom, and adapted to provide building heating, anda control arrangement adapted automatically to control the prime mover in response to said heating demand.
Abstract: A group control for an elevator system in which a call firmly assigned to a car, but not serviceable at a stop at the respective floor due to an expected overload, can be serviced subsequently by the same car. For this purpose first and second circuits, assigned to the floors, are provided. A selector scanning the floor and car call memories activates at every position the assigned first and second circuits, where the first circuit causes the car to pass the respective floor if an overload would be generated at a stop. The second circuits assigned to the upward and downward directions are linked to each other in such a manner that, on establishment of an overload, the scanning by the selector of the floor and car call memories assigned in each case to the calls of opposite direction is prevented.
Abstract: An operation control system for an internal combustion engine includes a first current detector for detecting a value of electric current flowing in a field winding of an AC generator of the engine, and an ECU responsive to the detected value of electric current for determining a control amount by which the operation of the engine is to be controlled, and for changing output torque of the engine in response to the determined control amount. A second current detector, preferably, a Hall element, detects a value of electric current flowing from the AC generator to electrical loads on the engine. The ECU detects a transient state of the electrical loads, based upon the detected value of electric current from the second current detector. The ECU is operable when the transient state is detected, for determining a transient correction amount of the determined control amount, in response to the detected value of electric current from the first current detector.
Abstract: A method of assigning hall calls to a plurality of elevator cars (0, 1, N) which biases the assignment process to balance the number of cars serving up and down service directions. Prior to each call assignment update the method determines the number of cars serving each service direction (78, 80, 82). A predetermined relationship (88) between there two numbers is used to determine if up hall calls should be assigned first, or down hall calls (90, 92, 94, 96). The balancing of cars serving the two service directions lowers the average waiting time, and it results in dispersing the cars throughout a building when service subsides, to enable prompt service for newly entered calls without the necessity of moving the cars during periods of low service to be in position for new calls.
Abstract: In a two cycle internal combustion outboard marine engine (10) having vertical crankshaft (12) extending upwardly through a crankcase (14) and an alternator stator (6), and having a flywheel (4) secured to the top of the crankshaft, a louvered flywheel cover shroud (30) is provided over the flywheel and alternator. The louvers are provided by a plurality of spaced ramps (50, 52, 54, 56) extending along spaced inclined planes and defining vent openings (36, 38, 40, 42) therebetween exhausting air, to cool the alternator.
Abstract: A plurality of components are mounted within a portable housing which may be mounted inside an elevator car on top of the door frame. The components comprise a people sensing means for detecting individual persons entering and leaving the elevator car and providing signals indicative of each such person and the direction of movement, and further comprise height sensing means for providing a signal indicative of the altitude of the portable housing, a clock for providing a time signal indicative of the time of day and a signal processor responsive to the person signal, the floor signal and the time signal for storing the time of day of a particular stop, the number of people entering and leaving and the floor.
Abstract: In elevator equipment in which an elevator controller is connected by a common transmission line to an elevator cage and a plurality of apparatus installed at elevator stops on respective floors, signals are transmitted from the elevator controller to the elevator cage and the plurality of apparatus of elevator stops on respective floors. Information transmitted between the elevator controller and the cage as well as each apparatus at elevator stop on each floor is sorted into information which is different for each apparatus on each floor and the cage (unique information) and information which is the same for the plurality of apparatus at elevator stops on respective floors and the cage (common information), and the unique information is transmitted during a first period and the common information is transmitted during a second period, thereby reducing time required for transmission of information during one cycle.
Abstract: Apparatus and method for generating electricity cheaply, efficiently, and with no resulting air or water pollutants. The device is pressurized so that water is forced out of the operating section of the device and up a small tube into a head tank. Once the device is in this position, a water pump in the head tank is activated thereby forcing water downward which, in conjunction with gravity, applies sufficient force to a water wheel located at the end of a large tube to turn an electrical generating device. Since the system is pressurized and sealed, water introduced into the operating section is forced continuously into the water side of the device back up the small tube and into the head tank for recycling.
Abstract: An enclosure for an engine and a generator which is adapted to be positioned in the front of a motor vehicle and adjacent an inlet for the coolng air of the vehicle engine. A housing encloses both an engine and a generator, and there are separate air inlet openings and air outlets for the engine and the generator. In a preferred manner the air outlet duct for the engine extends to the outside of a motor vehicle and laterally thereof with the air outlet adapted to accommodate an exhaust pipe for a generator engine. Also preferably the air inlet and outlet for the generator are disposed at a 90 degree angle from each other.
Abstract: There is disclosed an elevator speed control apparatus, in which a final signal representative of a traveling speed to be detected is determined by changing a first provisional signal depending on the traveling speed in accordance with a second provisional signal, when a difference between the two provisional signals exceeds a predetermined value; the first provisional signal being obtained on the basis of a pulse width of a pulse from a rotary encoder rotating with the travel of the elevator and the second one being obtained on the basis of a number of pulses in the pulse train for a predetermined sampling period.
Abstract: A group control for an elevator system, in which it is possible to assign a newly entered floor call to a car for the first time, immediately and finally, includes a computer and a comparator circuit for calculating servicing costs and assigning the call to the car with the lowest cost during a comparison cycle. The floor call generates an entry floor signal which is stored in a floor call memory and an assignment memory for the assigned car. Storage cells of the assignment memory and the floor call memory are linked to each other by way of an automatic holding circuit that prevents reassignment of the floor call during subsequent comparison cycles.
Abstract: An electrically compensated constant speed drive includes a mechanical differential having first and second input shafts and an output shaft wherein a prime mover is coupled to the first input shaft, a brushless generator is coupled to the differential output shaft and includes a control permanent magnet generator (PMG) and a main generator which develops output power and a speed compensation link is coupled between the control PMG and the second differential shaft. The speed compensation link includes a dynamoelectric machine coupled to the second differential input shaft and a power converter which interconnects armature windings of the control PMG and electrical power windings of the dynamoelectric machine.
July 5, 1988
Date of Patent:
September 19, 1989
Timothy F. Glennon, William E. McCracken
Abstract: A starter motor of the so-called overhang type in which a portion of the pinion 109 which has no teeth slides through a bearing 119 provided in the front bracket, comprises an output shaft 105 composed of a first portion 105a on which a helical spline 107 is formed, a second portion 105b having a smaller diameter than that of the first portion on which an inner member 108 of an over-running clutch 104 slides together with a bearing 110 provided on an inner surface thereof, and a third portion having a smaller diameter than that of the second portion on which a stopper member 113 for restricting an axial slide movement of a pinion is provided and the pinion having an inner diameter of a portion thereof on which the pinion teeth are formed smaller than an inner diameter of the inner member.
Abstract: The disclosed portable water-powered electric generator unit has a tubular form with opposite open inlet and outlet ends defining a longitudinal flow path for the moving stream water. The tubular form defines a converging venturi terminating at a throat between the inlet and outlet ends. An electric dynamo, having a sealed housing and external driving propeller means, is supported in the flow path downsteam of the throat, with the propeller means at the throat. The inlet end is between 2-5 times larger in area than the venturi throat, to speed up the water passing through the propeller means. The tubular form and housing together define a diverging venturi downstream from the throat, decelerating the water with minimal losses before exiting from the open outlet end. The open outlet end is 1.1-1.
Abstract: An exhaust gas turbine powered electric generating system for supplying electrical loads on a motor vehicle. The inlet of the gas turbine is supplied with the exhaust gas of an internal combustion engine. The effective turbine inlet area is controlled by a valve which is adjusted as a function of the output current of the generator. As generator output current increases the valve is adjusted to decrease turbine inlet area thereby increasing engine back pressure which tends to slow the engine down. An idle speed control is provided which in response to engine slow-down increases the amount of air and fuel supplied to the engine to thereby increase the exhaust gas mass flow supplied to the turbine.
Abstract: A power supply to various electric accesaries of a vehicle is stopped when an instruction of engine starting is given after a engine key switch is turned on. An excitation current of an electromagnetic switch of an engine starter increases gradually with time and after checking various conditions necessary to start the engine therafter, the supply of the excitation current is blocked until a completion of engine starting is decided when the checking shows some problem on engine start and a power supply to the various electric accessaries is allowed after a completion or blocking of the excitation current.
Abstract: A system for cranking/starting a combustion engine and for generating electrical power during engine operation uses an inverter-driven, high efficiency permanent magnet synchronous machine as a cranking/starting motor during a start mode and as an alternator during a run mode. A modified planetary gear assembly provides sufficient torque multiplication during the start mode to enable the synchronous machine to start the engine. One-way clutches allow the planetary gear assembly to provide the torque multiplication in the start mode and 1:1 coupling between the engine crankshaft and the shaft of the synchronous machine after the engine has been started and is operating.
Abstract: A controller for registering a hall calling is connected to signal transmitter/receiver units in halls by way of one signal wiring, a first instruction for detecting whether there is a hall calling in zones set at a plurality of sets and contained with predetermined number of hall buttons or not is outputted from the controller, a signal transmitter/receiver outputs, when the first instruction is inputted thereto, zone data indicating the presence or absence of a calling signal in the zone, a second instruction for detecting the floor having the calling signal is outputted, when the zone data is inputted to the controller, from the controller only to the signal transmitter/receiver unit in the zone having the calling, the signal transmitter/receiver unit which receives the second instruction outputs floor data indicating which is the floor having the calling signal, and the controller which receives the data outputs a lamp ON signal of the calling registration lamp to the signal transmitter/receiver unit.