Abstract: A mobile application including a motive power circuit including a power storage device and an electrical load electrically coupled through a power bus; a power distribution unit (PDU) electrically interposed between the power storage device and the electrical load, wherein the PDU comprises a breaker/relay positioned on one of a high side and a low side of the power storage device; wherein the breaker/relay comprises: a fixed contact electrically coupled to the power bus; a movable contact selectively electrically coupled to the fixed contact; an armature operationally coupled to the movable contact; a first biasing member biasing the armature into one of the first position or the second position; and a means for adjusting a down force value of the movable contact during run-time operations of the motive power circuit, wherein the down force value biases the moveable contact into electrical coupling with the fixed contact.

Abstract: A motor includes a rotor having a shaft disposed along a central axis extending in a vertical direction; and a stator opposed to the rotor in a radial direction with a gap therebetween. The stator includes: an annular core back extending in a circumferential direction; a plurality of teeth extending from the core back in the radial direction; a plurality of coils formed of a conductive wire wound around the teeth, the coils forming a plurality of connection systems; and an insulator, at least part of which is positioned between the teeth and the coils. The coils include: a first coil wound around the teeth via the insulator; and a second coil wound around the teeth via the first coil and the insulator.

Abstract: A washing and/or drying appliance (100) includes an electric load (115; 144; 170; 177) and a driving apparatus (200) for driving the electric load (115; 144; 170; 177). The driving apparatus (200) includes: —a TRIAC (205) comprising a first anode terminal (M1) coupled with a first terminal (TN) of an AC electric power supply and a second anode terminal (M2) coupled with a first terminal of the electric load (115; 144; 70; 177). The electric load (115; 144; 170; 177) includes a second terminal coupled with a second terminal (TL) of the AC electric power supply; —a microcontroller (215) configured to generate a driving signal, and —a triggering circuit (208) for activating the TRIAC (205) by providing triggering pulse signals to a gate terminal (G) of the TRIAC (205) based on the driving signal.

Abstract: A polyphase electric motor has a rotor, a stator with a plurality of slots, a plurality of main windings and a plurality of auxiliary windings installed in slots of the stator, and a main winding and an auxiliary winding that correspond to a selected phase of an alternating current power source. The auxiliary windings are connected to the motor terminals through a plurality of capacitors, and the auxiliary windings and corresponding capacitors are connected in parallel to the main windings. The main winding and the auxiliary winding of the selected phase are offset by about 60 to about 120 electrical degrees. A power of the plurality of main windings is at least 75% of a power of the polyphase electric motor at full load rating and the power of the plurality of main windings is motoring at 25% of the full load rating.

Abstract: A polyphase electric motor has a rotor, a stator with a plurality of slots, a plurality of main windings and a plurality of auxiliary windings installed in slots of the stator, and a main winding and an auxiliary winding that correspond to a selected phase of an alternating current power source. The auxiliary windings are connected to the motor terminals through a plurality of capacitors, and the auxiliary windings and corresponding capacitors are connected in parallel to the main windings. The main winding and the auxiliary winding of the selected phase are offset by about 80 to about 100 electrical degrees. A power of the plurality of main windings is at least 75% of a power of the polyphase electric motor at full load rating and the power of the plurality of main windings is motoring at 25% of the full load rating.

Abstract: A method for detecting rotation of a rotor of a multiple phase motor with bipolar drive is described, excluding a three-phase motor with bipolar drive with star connected coils or motor stator windings. The motor has at least a first and a second energizable motor stator winding. A voltage is sequentially and alternately sensed on the first and the second motor stator winding at or near the end of a period of a non-energised state thereof. An apparatus for detecting rotor speed is also provided.

Abstract: A motor controller for simultaneously controlling operations of at least two system motors by pulse-width modulation. The motor controller includes a pair of switches, a pair of pulse signal generators, and a phase shifter. The switches are used for supplying driving power to the two system motors. The pulse signal generators are used for generating a pair of pulse signals respectively having predetermined duty ratios at predetermined cycles, and outputting the pulse signals to the pair of switches to turn on or off the pair of switches. The phase shifter is used for inverting, with respect to the phase of one of the two pulse signals that is generated and output by one of the two pulse signal generators, the phase of the other of the two pulse signals, which is generated and output by the other of the two pulse signal generators, by 180 degrees.

Abstract: In a power converter, an overvoltage suppression function of low cost and high reliability is provided. The power converter has a power conversion circuit, when driving a motor, for converting power from a battery and supplying it to the motor and when the motor generates power, converting the generated power of the motor and supplying it to the battery for storage of electricity and a drive circuit for driving the power conversion circuit. The power conversion circuit includes a plurality of paired switching elements, in which one of each paired switching elements is arranged on an upper arm, and the other is arranged on a lower arm, and each pair corresponds to each phase of the motor. The drive circuit, when the voltage applied to the power conversion circuit is increased, turns on all the switching elements on one arm, turns off all the switching elements on the other arm, thereby short-circuits the output terminals of the motor.

Abstract: A system includes a motor mounted within a housing and a compressor pump unit. A single-phase PSC motor includes a switch assembly which selectively connects primary or alternate windings. During normal load operation, when maximum efficiency is desired, the switch is placed in one position, then during high load operation, when maximum torque output is needed at maximum a load point, the switch is placed in the closed position. In effect, the number of main winding turns is decreased and the motor is strengthened. As the auxiliary capacitors are also now connected in parallel, the net effect is an increase in the total auxiliary capacitance, which also serves to strengthen the motor. Another embodiment provides a switch for a three-phase WYE connected motor. In yet another embodiment, a three phase delta connected motor switch is provided.

Abstract: A starting system for an electric motor having a main coil and an auxiliary coil which are supplied current by an electric current source in which a switch is connected between the electric current source and the auxiliary coil that has an open condition, in which the auxiliary coil remains de-energized by the electric current, and a closed condition for energization of the auxiliary coil with the electric current. An actuating system is positioned relative to the electric motor to receive the magnetic field produced by the motor main coil upon its energization by the electric current for operation of the electric motor that operates to close the switch in response to the magnetic field produced by the current passing through the motor main coil with an intensity above a determined minimum value, and opens the switch when the current through the main coil produces a magnetic field having an intensity of the determined minimum value.

Abstract: The prior art technique should return the voltage applied to a synchronous motor to zero in the process of measurement of an electrical angle. This causes foreign noises. The structure of the present invention utilizes the fact that the electrical angle of a three-phase synchronous motor 40 depends upon the inter-coil inductances. The procedure of the present invention applies a predetermined voltage for measurement to each combination of coils, and measures variations in electric currents flowing through the respective coils. The electric current flowing through each coil is attenuated in the presence of a driving current in the three-phase synchronous motor 40, compared with the case in the absence of a driving current. The procedure of the present invention accordingly refers to a table 122A to correct the observed values of electric currents based on the variations in electric currents, and refers to another table 122B to read the electrical angle .pi.

Abstract: A winding circuit for use with different input signals includes a first main winding, a second main winding, and an auxiliary branch having an auxiliary winding permanently and serially connected to a capacitor. The windings and auxiliary branch are alternatively configurable in one of a first configuration or a second configuration for use with respective first and second input voltages. When in the first configuration, the first main winding, the second main winding, and the auxiliary branch are connected in parallel. The input voltage signal then may be applied across the first main winding. When in the second configuration, the first and second main windings are serially connected, and the auxiliary branch is connected in parallel with one of the first and second main windings. The input voltage signal then may be applied across the first main winding and the second main winding.

Abstract: The invention is a motor-driven adjustable height podium having motor control circuitry with up and down relays for directing current through the electric motor to raise or lower the podium. The relay circuitry is specially configured to avoid a short circuit condition should a situation occur in which both the up and down relays are shut at the same time. Up and down limit switches limit the maximum vertical travel of the podium. A protective circuit breaker and isolation switch are also provided. The unit is designed to be powered from a standard 110 volt wall socket, for powering the motor, and a 24 volt power supply, for powering the relays.

Abstract: A washing machine includes a rotational tub, a single-phase induction motor driving the rotational tub in a dehydrating operation and having a main and an auxiliary coils, a speed detector for detecting a speed of the motor, thereby generating a detection signal, and an output changeover device for changing between an operation mode in which both of the main and auxiliary coils are excited and the other operation mode in which either the main or auxiliary coil is excited. When the motor speed is increased in the dehydrating operation, a control circuit controls the motor in a feedback manner. More specifically, in low and medium speed ranges, the control circuit executes a control pattern in which both of the main and auxiliary coils are excited and selectively executes another control pattern in which only the auxiliary coil is excited when necessary.

Abstract: A control device is provided for an alternating current motor operating in single phase and having first and second windings coupled so that they are shifted in phase with respect to each other. A control unit includes first and second switching elements located between a line connection and respective first and second windings of the motor. One of the switching elements is open and the other closed in a switching state of the control unit, depending on the running direction of the motor. At least one of the switching elements is open when the control unit is in a state of rest. A power supply unit is provided for providing electric energy to the control unit. When the control unit is in a state of rest, the power supply operates by drawing on a first potential difference between a line connection and winding connection associated with the switching element that is open in the state of rest.

Abstract: An AC motor control system and process useful in such AC motor applications as elevators, storage retrieval machines, cranes and hoists, and other load-carrying and work performing machinery.Two identical and electrically isolated windings are utilized in an AC motor with the current to each winding being controlled through an SCR bank. A first winding, when energized, sets up an electromagnetic field which drives the rotor in a clockwise. A second winding, when energized, drives the rotor in a counterclockwise direction.The use of two separate motor windings eliminates line-to-line electrical short circuit problems so that expensive lock-out circuits, circuit breakers, current feedback detectors and air chokes are no longer required.

Abstract: A motor control circuit for operating a permanent split capacitor motor from an ac source. The motor control circuit causes the motor to accelerate and decelerate according to a velocity profile. A driver circuit connects the motor to the ac source. The driver circuit receives a pulse signal at a predetermined time point after a zero crossing of the ac source and connects the ac line current to the motor at the predetermined time point, then the driver circuit disconnects the ac source from the motor at the next zero crossing of the ac source. A ramp wave signal is generated, each ramp thereof beginning at a zero crossing of the ac source and a dc voltage representative of the speed of the motor is also generated. A velocity profile having a predetermined period is provided on an output of a velocity profile generator. A first comparator circuit has a first input for receiving the dc voltage and a second input for receiving the velocity profile. An error signal is provided on an output thereof.

Abstract: Operators for sliding gates including a solenoid-operated detent for engaging a gear of the gate drive motor shaft speed reducer and locking the associated gate, and a key-operated cam for disengaging the detent from the gear.

Abstract: A dual capacity permanent split capacitor electric motor system is provided with a stator having main and auxiliary windings. The main stator winding includes two winding sections which are connected in parallel with each other and across a pair of line terminals while the auxiliary winding is connected in series with a capacitor to form a circuit branch which is connected between the line terminals for operation at a first output power level. Switching means are provided to reconnect the main stator winding sections in series with each other and in series with a second capacitor to form a circuit branch which is connected between the line terminals while the stator auxiliary winding is connected directly between the line terminals for operation at a second output power level. Automatic rotation reversal occurs when the motor switches from the first to the second output power level.

Abstract: A single-phase, reversible induction motor, comprising two cylindrical rotors disposed side by side on the same axis of rotation, the rotors being composed of laminated iron cores and provided with grooves of the same number disposed in parallel with the shaft and on respective surfaces of the cylindrical rotors at regular intervals; two two-pole field systems respectively composed of laminated iron cores and surrounding the rotors, and coils for exciting the field systems, respectively, the field systems and the coils being arranged so that the directions of passage through the rotors of magnetic fluxes emanating therefrom be perpendicular to each other; and a switching circuit for reversing the phase of a single-phase alternating current supplied to one of the coils. Conductors of a magnetically permeable material are fixedly secured to all the grooves of one of the rotors but electrically isolated from the rotor iron core.

Abstract: An electrical apparatus producing pulsating high torque rotational vibration movement combined with a slow superimposed unidirectional rotary motion is disclosed. The apparatus includes an alternating current motor combined in a mechanically resonatable system with electrical apparatus producing a non-alterating component of magnetic flux in the motor structure. The torque generating ability of the motor is increased approximately five-fold even though the motor is operated from the same supply voltage. The disclosed apparatus is illustrated connected to a waste disposer device.