Abstract: A digital processor implemented electronic governor for engine-generator units including a first control loop for producing a speed error and controlling fuel delivery setting as a function thereof and a second control loop for detecting rack error and producing a field excitation current control signal as a function thereof. Power dips and overruns are voided by modifying rack error as a function of engine acceleration. Means are provided for developing speed errors and rack control signals despite a breakdown in the rack position indicator. Open loop lower power setting controls are provided. Wheel-slip control, power limiting and variable acceleration functions are provided.

Abstract: An electric generating system is provided and consists of an external power source, an expansion engine connected to the power source, a large generator electrically connected to output of the expansion engine, a housing having a well, a pair of bearings mounted to side walls of the well, a motor having a drive shaft, the motor mounted vertically at bottom of the well, electrically connected to output of the generator with the drive shaft rotatably mounted in the bearings having an end extending therefrom, a large bevel gear driven by the drive shaft of the motor, a plurality of small bevel gears, each small bevel gear radially aligned and driven by the large bevel gear and a plurality of small generators, each small generator having a driven shaft affixed to a small bevel gear and mounted to the housing around the well to produce 100 percent output of electrical power.

Abstract: A wind machine turns a shaft to activate a multi-stage positive displacement pump having intake and discharge means respectively coupled to intake and discharge fluid lines in a recirculating hydraulic system. Control means regulates the operative positions of the intake means, discharge means or separate idling means to remove selected stages from effective pumping while at the same time fluid passes into and from the selected stages. The stages can be of different capacities and selected groups or all of them may be periodically idled by a common or individual idling means. Constricting means is located in the common discharge line from all stages and can be additionally located in each discharge line from each stage.

Abstract: A wind machine turns a shaft to activate a multistage pump having intake and discharge means respectively coupled to intake and discharge fluid lines. Idling means is provided for each stage and constricting means is located in series with each stage between the intake and the discharge lines. Control means regulates the idling means and constricting means to remove selected stages from effective pumping while at the same time fluid passes into or from the selected stage. Pressure in the fluid discharge line is retained substantially constant without the need for energy accumulation and at the same time the torque on the shaft can be adjusted to retain the shaft speed in a range for effective wind energy conversion. During starting the constricting means is closed while the idling means opens until an operational speed is reached. Power assisted starting is achieved by initially reversing the fluid flow through selected stages.

Abstract: A wind energy collecting device comprise a vertical rotor and blade of which the face exposed to the wind includes cells for engulfing air currents. The blades drive a uses device through unique shock absorber means.

Abstract: A frequency of a power supply applied to a stepping motor changes in accordance with a predetermined program to control the stepping motor such that a predetermined rotational speed of the motor is quickly obtained without generating noise. The power supply frequency is abruptly and linearly increased or decreased within an initial predetermined time interval. A high accelerating or decelerating torque is applied to the stepping motor to obtain a first rotational speed for a short period of time. Thereafter, the power supply frequency is exponentially decreased or increased within a final predetermined time interval to obtain a second rotational speed at which the noise level is low.

Abstract: A stepper motor controller which can control the motor to stop rapidly and with minimum overshoot and oscillation at a selected position by turning on and off one or several coils in a binary fashion to force the motor to conform to a predetermined position/velocity profile, resulting in the motor velocity and the position deviation from the null point to converge to zero at the selected null point. An encoder continuously generates current position and velocity data, a comparator compares the current velocity and position to a predetermined velocity/position profile to produce a binary output, and one or several motor coils are energized to drive the current motor velocity toward the predetermined value.

Abstract: A turbine generator system for use in a flow line from a water supply to a water usage, treatment or storage system employs a remotely controlled valve for control of the flow of water through the turbine. The system is arranged to shut down upon occurrence of under or over voltage at the generator or loss of pressure at the turbine, disconnecting the generator from the utility line and closing the control valve to stop flow through the turbine. Should failure of the utility line power decrease the generator load to increase turbine speed, restart is prevented until the control valve has closed to stop the turbine. A time delay in the control panel shuts down the system if the control valve does not open within a selected time interval after start up.

Abstract: A DC brushless motor wherein each of circular-arc pole shoes of a stator arranged facing a rotor having a cylindrical permanent magnet with N- and S-poles magnetized alternately around the circumference thereof has a narrow groove extending along almost half the length of the arc from one end thereof near the surface facing the permanent magnet. The permanent magnet provided for the rotor is constituted in such a manner that the radius of its surface facing the stator varies continuously over the length of arc of each pole shoe from one end thereof to the other.

Abstract: The anti-wheel-lock control system has a wheel speed transducer (1), an evaluation circuit (3), and a braking pressure control device (4, 5).Particularly in commercial vehicles and at low speed, the vehicle wheel may exhibit frictional oscillations; these frictional oscillations appear as rapidly changing speed signals when sensed by the value transducer (1), which simulate sudden high wheel speed. The invention addresses the problem of eliminating these disturbances. The changes in the speed signals are physically impossible, and the disturbances are eliminated by a circuit (15, 16, 27, 28, 29) which recognizes physically impossible changes in the wheel speed by comparing the actual speed signals with a simulation threshold at which changes in speed are physically impossible.

Abstract: A three state driver for an inductive load, e.g., a stator winding of a variable reluctance motor, allows the use of charge, idle, and discharge states in which a positive voltage, a short, and a reverse voltage are connected across the inductive load, respectively. An H-bridge comprising two electronic switches and two diodes is used to switch the inductive load voltages as commanded by a comparator circuit which compares the load current to a desired load current.

Abstract: There is provided an electrical inching control for inching a drive system comprising a grinding mill driven by one or more three phase synchronous motors. The electric inching control includes an inching power bus and contactors or the solid state equivalent thereof. The inching bus supplies energy for the stator windings of the synchronous motors. The contactors or switches connect the positive and negative sides of a direct current power supply to the different phases of the stator windings in a sequence which provides a stepped rotating magnetic field, and the rotor field windings are excited with direct current. The interacting stator and rotor fields causes a rotation of the rotor a predetermined amount with each step causing the mill also to rotate a respective predetermined amount.

Abstract: A wind machine turns a shaft to activate a multistage pump having intake and discharge means respectively coupled to intake and discharge fluid lines. Control means regulates the operative positions of the intake means or discharge means to remove selected stages from effective pumping while at the same time fluid passes into and from the selected stages. The stages can be of different capacities and selected groups or all of them may be periodically sequentially idled. Torque on the shaft is thereby adjusted to retain the shaft speed in a range for effective wind energy conversion. During starting the stages are idled until an operational speed is reached. Power assisted starting can be achieved by initially reversing the fluid flow through selected stages. Constricting means is located in the common discharge line from all stages and can be additionally located in each discharge line from each stage.

Abstract: A control device for brushless motor comprises an inverter (3), a control circuit (8) and a rotor position detecting circuit (9). In the rotor position detecting circuit (9), voltage induced in stator coils (U, V and W) due to rotation of a rotor (7) and neutral voltage at a virtual neutral point (25) are compared by comparators (CU, CV and CW) so that polarity changing points can be detected. The control circuit (8) controls the inverter (3) based on the above stated polarity changing points so as to control changeover of the modes for conducting to the stator coils (U, V and W). As a result, rotation of a brushless motor can be controlled without using Hall elements.

Abstract: A vehicle carried profile generator generates a speed profile to control a vehicle governor at the transition from a higher to lower speed limit. The speed profile is calculated and checked to ensure it starts at a valid speed limit, continually decreases and is above a wayside speed limit. The governor is modified or controlled to inhibit brake application or a requirement for a brake application so long as actual speed is below profile speed.

Abstract: A wind powered device on a support structure is provided with a drive shaft mounted for rotation about its axis on the support structure and is coupled to an electric generator connected to a utility power grid.A rotor is mounted on the support structure and is adapted to drive the shaft, hence the electric generator. The rotor has at least one rotor blade. The rotor is mounted to drive the shaft and also for limited relative rotational movement with respect to the drive shaft about the axis of the drive shaft as the wind velocity driving the rotor changes. The coupling between the shaft and rotor responds to increases and decreases in rotor torque so that as imbalances between shaft torque and rotor torque arise, the rotor tends to run ahead of or behind the shaft.

Abstract: Vehicle propulsion system or the like characterized by energy interchange between a plurality of flywheel assemblies each including a driving/driven induction motor/generator, and a plurality of vehicle drive wheel assemblies including drive wheels each directly driving/driven by an induction motor/generator, with energy makeup provided by a heat engine driven generator means, operated on demand, such energy interchange being by means of a multi-directional bus to which the flywheel and drive wheel motor/generators are selectively connected by variable frequency switch means and to which the engine driven generator is connected when operating, the switching being under control of a digital computer type controller, the controller receiving as inputs various vehicle operating conditions including flywheel, drive wheel, brake, steering angle and speed control positions, and bus voltage and heat engine driven generator operating condition, and the controller generating switch means controlling outputs causing en

Abstract: A control system for a stepping motor in which a current (or voltage) to be fed to each excitation coil of the motor at the timing for an m-phase excitation is different from a current (or voltage) to be fed at the timing for an n-phase excitation. This difference in current (or voltage) causes a same torque to develop both in the m-phase excitation and n-phase excitation.

Abstract: For isolating dynamic rotational signal components from a dominating line frequency component in the stray magnetic fields escaping from the motor, a pick-up probe for instrumentation analyzing the motor characteristics is provided with a feedback winding and feedback circuit resonant therewith over a band including a harmonic of the normal motor rotational speed, i.e. full rated load speed. Thus, sensing of a-c induction motor conditions can occur with a single uncritically spaced external probe that needs no motor mechanical, photo or electrical additions or modifications. No access need be had to rotating motor shafts or driven mechanisms.Thus for the first time instrumentation is made independent of installation of accessories by skilled technicians in existing locations for monitoring motor characteristics. Nor are special motors with special wiring, coils, rotating elements or accessories necessary to couple monitors.

Abstract: In a commutating device for an electric motor which is supplied from a d-c voltage source, which includes semiconductor switching elements arranged in a bridge circuit and addressed by means of a control voltage in dependence on the rotor position of the motor, in order that the semiconductor switching elements can be addressed without transformers and without separate control voltage sources, the residual voltage dropping across the load circuit of the semiconductor switching elements and/or the inverse voltage stored in the respectively preceding cut-off phase is used as the control voltage.