Abstract: A permanent split capacitor (PSC) motor includes a stator defining an axis of rotation and a rotor disposed adjacent the stator. The stator includes a start winding, a capacitor electrically coupled in series with the start winding, a first plurality of windings, and a second plurality of windings. The motor includes first and second sets of electrical leads connected respectively to the first plurality of windings and to the second plurality of windings, the first plurality of windings and the second plurality of windings respectively configurated to rotate the motor respectively at a first and second rotational speeds of the motor when mounted respectively to the first machine and to the second machine.

Abstract: A shredder includes a cutting mechanism operable to shred material fed thereto. A controller is coupled to the cutting mechanism to control the on/off state and the direction of rotation of the cutting mechanism. An interactive user interface is coupled to the controller. The controller is configured to detect a jammed condition within the shredder and communicate a series of instructions to the interactive user interface to instruct the user how to clear the jam.

Abstract: A starting circuit for a single-phase AC motor, consisting at least-of a rectifying and voltage-stabilizing circuit, a control circuit with a zero-cross detecting circuit and a counter, and a bidirectional thyristor. The bidirectional thyristor is serially connected to a starting winding and a starting capacitor, the bidirectional thyristor, the starting winding and the starting capacitor are connected a utility power AC input. The input end of the rectifying and voltage-stabilizing circuit is connected to the utility power AC input. The output end of the rectifying and voltage-stabilizing circuit supplies power to the control circuit. The input end of the zero-cross detecting circuit is connected to the utility power AC input. The output end of the zero-cross detecting circuit is connected to the input end of the counter.

Abstract: An apparatus and method for controlling starting of a motor are disclosed. An exciting coil of a motor is excited by using a controller of an electronic refrigerator without having an extra excitation control circuit, to thereby simplify a component construction for controlling exciting of the motor and thus reduce complexity. The present invention includes: a main coil and an auxiliary coil (sub-coil); an exciting coil that generates an excitation current; a refrigerator control unit that outputs a control signal for controlling an application time of the excitation current when started; and a switch unit electrically connected with the exciting coil and supplying power to the exciting coil according to the control signal outputted from the refrigerator control unit.

Abstract: A starting system for a single-phase induction motor, comprising: a stator having a running coil (11) and a starting coil (12); a power source (F) which supplies current to said running coil (11) and said starting coil (12); a running switch (S1) and a starting switch (S2), respectively connecting the running coil (11) and the starting coil (12) to the power source (F) when in a closed condition; and a control unit (30) which is programmed to operate the running switch (S1) so as to cause a delay in the supply of the current supplied to the running coil (11) in relation to the supplied of the to the starting coil (12), during the motor start for a determined time interval which is previously defined and considered from the zero-crossing moment of the current supplied to the stator.

Abstract: An exciting coil of a motor is formed to be controlled by using an analog timer to thus control an excitation control circuit of a motor control apparatus, whereby an excitation control circuit that excites an exciting coil of a motor control apparatus can be simplified and complexity can be reduced by simplifying a circuit construction of an excitation controller. The present invention includes: an auxiliary winding (sub-coil) and a main winding (main coil); and an exciting unit which is electrically connected with the auxiliary winding and the main winding, determines an excitation application time and an excitation time, and generates an excitation current according to the determined excitation application time and the excitation time.

Abstract: After a power source is turned on, the motor stars by feeding a current to the auxiliary wiring for a first predetermined period. Then, a voltage induced in the auxiliary wiring is detected. Whether or not the detected inducted voltage is lower than a predetermined voltage is judged. The detected induced voltage is judged to be lower than the predetermined voltage when the shredder cannot cut the paper and the rotation speed of the motor is decreased. In this case, since the current is fed to the auxiliary wiring for a second predetermined period, the rotation speed of the motor is increased and an output torque is also increased, which leads to the cuttable state.

Abstract: A starter circuit for motors, particularly for refrigerator compressors, comprising a starter device which is adapted to be connected to a starter winding and to a steady-state winding of an asynchronous motor, the windings being in turn connected to a power supply line, a capacitor being connected in parallel to the starter device; the starter circuit further comprises a resistive element which is adapted to be connected between the starter device and the capacitor, in order to limit a discharge current of the capacitor on the starter device.

Abstract: A speed controller for a single phase motor such as a permanent split capacitor motor allows the motor to be operated at a first speed, n1, and a lower speed, n2. High speed motor operation is produced by passing a single phase AC current through both the main and auxiliary windings of the motor. For low speed operation, the controller passes first and second reduced frequency AC waveforms through the motor's auxiliary and main windings, respectively. The first waveform bypasses the motor's auxiliary winding capacitor and is phase shifted 90 degrees from the second AC waveform. A split source capable of generating an AC signal and its inverted signal can be used by the controller to generate the reduced frequency waveforms. Specifically, the controller uses selected half cycles from each split source signal to produce the reduced frequency waveforms.

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: A motor start switch includes a temperature responsive resistor element and a bimetal cutout switch electrically connected in series with a start winding of an electric motor. The cutout switch is operable between an open position disconnecting the temperature responsive resistor from the start winding, and a closed position electrically connecting the temperature responsive resistor to the start winding. The cutout switch transitions from the open position to the closed position due to current flowing through, and heating, a bimetal element in the cutout switch.

Abstract: A device for automatically shutting off a current is used in combination with a motor start-up component incorporated in a motor-driving circuit including an auxiliary coil which operates at a start-up time of a motor and a main coil for its steady-state operation. This motor start-up component includes a motor start-up thermistor with positive temperature characteristic having a first electrode and a second electrode, a first connector member having a first male terminal part and connected to the first electrode and a second connector member having a second male terminal part and connected to the second electrode. The motor start-up thermistor is connected in series to the auxiliary coil through the first electrode.

Abstract: Device for driving a body by means of an electric motor, comprising mechanical means for measuring the displacement of said body which are kinematically linked to the body and are equipped with switches (ID, IM) actuated by the mechanical measurement means at certain points on the trajectory of the body. The device comprises means for initializing a phase for specific powering of the motor such as power supply at reduced torque for a timed duration (TP, x, C4) or power supply at reduced voltage or cut-off of the power supply, switched in by actuation of at least one of said switches.

Abstract: A hoist machine provided with a driving member driven by a capacitor start single phase motor, which is provided with a governor and a switching device for turning a start capacitor on and off following operation of the governor. The switching device is provided with a switch control panel, which, when the driving member drives to hoist a load, maintains on-operation of the lowering side switch and turns off the hoisting side switch following the operation of the governor to thereby cut off energization to the start capacitor, and when in a lowering operation, maintains on-operation of the hoisting side switch and turns off the lowering side switch to thereby cut off energization of the start capacitor.

Abstract: An automatic reverse system for a shredder machine automatically causes reversal of the shredder motor when the system becomes jammed. A centrifugal switch connected with a starter winding of the drive motor disconnects power feed thereto when the motor is rotating above a predetermined speed. A manually actuated switching circuit in combination with the centrifugal switch initially energizes the system for forward operation. When a jam occurs, the centrifugal switch together with the switching circuit automatically causes a reversal in the direction of rotation of the motor, the reverse operation continuing until the operator manually actuates a switch to deenergize the system or when an automatic switch halts reverse rotation after a predetermined time period.

Abstract: Disclosed is an instant reverse control circuit for a single phase, squirrel cage induction motor that has an exemplary use for opening and closing elevator doors. The motor has a running winding and a motor starting circuit comprised of serially connected start winding, capacitor, and centrifugal switch for deenergizing the start winding when the motor is up to running speed. The control circuit includes a relay operated, power reversing switch that supplies power to the starting circuit through an additional relay operated instant reverse switch. The instant reverse relay that operates the switch is connected in parallel with the starting circuit and its switch has a relay maintaining contact and a bypass contact. The bypass contact supplies reverse power to the start winding when the motor is to be reversed suddenly, such as to open a closing door that has struck an obstruction.

Abstract: A torque reversing motor control structure and method for a reversible split phase or capacitive start motor including a centrifugally operated start switch and a transformer controlled motor contactor wherein the primary circuit of the transformer is completed through the start switch to prevent reversing the motor contactor without the motor start switch being closed to insure positive reverse of the motor.

Abstract: A refuse compactor having a selector switch for causing the ram to be automatically retained in the compacting position when desired. The control of the compactor is also arranged to provide an automatic movement of the ram to the compacting position and then to a retracted position with the selector switch permitting such automatic cycling, when desired. A signal device is associated with the control to provide an indication of the retention of the ram in the compacting position when the compactor is so arranged. The control may include centrifugal switches and a selector switch for selectively controlling energization of individual forward and reverse start windings of the drive motor for selectively moving the ram.