Laundering apparatus, method of operating a laundry machine, control system for an electronically commutated motor and method of operating an electronically commutated motor
First Claim
1. A laundering apparatus comprising in combination:
- at least one rotatable device for being driven in forward and reverse strokes of agitation;
an electronically commutated motor including a stationary assembly having a plurality of winding stages associated therewith and adapted to be selectively commutated, and rotatable means associated with said stationary assembly in selective magnetic coupling relation with said winding stages and adapted for driving said at least one rotatable device upon the electronic commutation of said winding stages;
means for commutating said winding stages by applying a voltage thereto in at least one preselected sequence during successive commutation periods;
means for controlling the voltage applied to said winding stages by said commutating means so that the applied voltage varies as a function of an input signal thereto; and
means for selectively generating one of a plurality of electrically varying signals, corresponding to one of a plurality of waveshapes to which the strokes of agitation are to be selectively made to conform, as the input signal to said controlling means, each of the strokes of agitation having substantially the same duration as the selectively generated one electrically varying signal, the input signal being variable over many commutation periods in accordance with the selected waveshape substantially independently from any variation of the applied voltage during any one of the commutation periods.
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Accused Products
Abstract
A method of operating a laundry machine. The machine has a pair of rotatable components and is driven by an electronically commutated motor having a stationary assembly with a plurality of winding stages and also having a rotatable assembly adapted to be selectively coupled to at least one of the rotatable components. In this method, a DC voltage for application to the motor is received, and a first control function is imposed on the operation of the machine to control the application of the DC voltage in accordance with a selected one of a plurality of first waveshapes so as to provide a resultant effective voltage to the motor. A second control function is imposed on the operation of the machine through the controlled application of the DC voltage to selectively set the maximum amplitude of the effective voltage, and the winding stages are commutated by applying the effective voltage thereto in sequence whereby the first and second control function jointly determine the angular velocity of the at least one rotatable component.
A laundering apparatus, a control system for an electronically commutated motor, and a method of operating an electronically comutated motor are also disclosed.
76 Citations
92 Claims
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1. A laundering apparatus comprising in combination:
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at least one rotatable device for being driven in forward and reverse strokes of agitation; an electronically commutated motor including a stationary assembly having a plurality of winding stages associated therewith and adapted to be selectively commutated, and rotatable means associated with said stationary assembly in selective magnetic coupling relation with said winding stages and adapted for driving said at least one rotatable device upon the electronic commutation of said winding stages; means for commutating said winding stages by applying a voltage thereto in at least one preselected sequence during successive commutation periods; means for controlling the voltage applied to said winding stages by said commutating means so that the applied voltage varies as a function of an input signal thereto; and means for selectively generating one of a plurality of electrically varying signals, corresponding to one of a plurality of waveshapes to which the strokes of agitation are to be selectively made to conform, as the input signal to said controlling means, each of the strokes of agitation having substantially the same duration as the selectively generated one electrically varying signal, the input signal being variable over many commutation periods in accordance with the selected waveshape substantially independently from any variation of the applied voltage during any one of the commutation periods. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A control system for an electronically commutated motor including a stationary assembly having a plurality of winding stages associated therewith and adapted to be selectively commutated, and rotatable means associated with the stationary assembly in selective magnetic coupling relation with the winding stages, the control system comprising:
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means for commutating the winding shapes by applying a voltage thereto in at least one preselected sequence during successive commutation periods thereby to drive the rotatable means in forward and reverse excursions of rotation; means for controlling the voltage applied to the winding stages by said commutating means so that the applied voltages varies as a function of an input signal thereto; and means for selectively generating one of a plurality of electrically varying signals, corresponding to one of a plurality of waveshapes to which the excursions of rotation are to be selectively made to conform, as the input signal to said controlling means, each of the excursions of rotation having substantially the same duration as the selectively generated one electrically varying signal, the input signal being variable over many commutation periods in accordance with the selected waveshape substantially independently from any variation of the applied voltage during any one of the commutation periods. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A control system for an electronically commutated motor including a stationary assembly having a plurality of winding stages associated therewith and adapted to be selectively commutated, and rotatable means associated with said stationary assembly in selective magnetic coupling relation with said winding stages, the control system comprising:
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means for commutating the winding stages by applying a voltage thereto in at least one preselected sequence during successive commutation periods thereby to produce a torque and drive the rotatable means in forward and reverse excursions of rotation; means for controlling the voltage applied to the winding stages by said commutating means so that the current flowing in the winding stages as a result of the applied voltage varies as a function of an input signal thereto; and means for selectively generating one of a plurality of electrically varying signals, corresponding to one of a plurality of waveshapes to which the torque during the excursions of rotation is to be selectively made to conform, as the input signal to said controlling means, each of the excursions of rotation having substantially the same duration as the selectively generated one electrically varying signal, the input signal being variable over many commutation periods in accordance with the selected waveshape substantially independently from any variation of the applied voltage during any one of the commutation periods. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32)
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33. A method of operating a laundry machine driven by an electronically commutated motor, the laundry machine including at least one rotatable device for being driven in forward and reverse strokes of agitation, and the electronically commutated motor including a stationary assembly having a plurality of winding stages associated therewith and adapted to be selectively commutated, and rotatable means associated with the stationary assembly in selective magnetic coupling relation with the winding stages and adapted for driving the at least one rotatable device upon the electronic commutation of the winding stages, the method comprising the steps of:
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commutating the winding stages by applying a voltage thereto in at least one preselected sequence during successive commutation periods; selectively generating one of a plurality of electrically varying signals, corresponding to one of a plurality of waveshapes to which the strokes of agitation are to be selectively made to conform, each of the strokes of agitation having substantially the same duration as the selectively generated one electrically varying signal; and controlling the voltage applied to the winding stages in the commutating step so that the applied voltage varies as a function of the one electrically varying signal, the one electrically varying signal being variable over many commutation periods in accordance with the selected waveshape substantially independently from any variation of the applied voltage during any one of the commutation periods. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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- 44. A method of operating a laundry machine driven by an electronically commutated motor, the laundry machine including at least one rotatable device for being driven by a torque in forward and reverse strokes of agitation, and the electronically commutated motor including a stationary assembly having a plurality of winding stages associated therewith and adapted to be selectively commutated, and rotatable means associated with the stationary assembly in selective magnetic coupling relation with the winding stages and adapted for driving the at least one rotatable device upon the electronic commutation of the winding stages, the method comprising the steps of:
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45. commutating the winding stages by applying a voltage thereto in at least one preselected sequence during successive commutation periods;
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selectively generating one of a plurality of electrically varying signals, corresponding to one of a plurality of waveshapes to which the torque during the strokes of agitation is to be selectively made to conform, each of the strokes of agitation having substantially the same duration as the selectively generated one electrically varying signal; and controlling the voltage applied to the winding stages in the commutating step so that the current flowing in the winding stages as a result of the applied voltage varies as a function of the one electrically varying signal, the one signal being variable over many commutation periods in accordance with the selected waveshape substantially independently from any variation of the applied voltage during any one of the commutation periods.
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54. A method of operating an electronically commutated motor including a stationary assembly having a plurality of winding stages associated therewith and adapted to be selectively commutated, and rotatable means associated with the stationary assembly in selective magnetic coupling relation with the winding stages, the method comprising the steps of:
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commutating the winding stages by applying a voltage thereto in at least one preselected sequence during successive commutation periods thereby to drive the rotatable means in forward and reverse excusions of rotation; selectively generating one of a plurality of electrically varying signals, corresponding to one of a plurality of waveshapes to which the excursions of rotation are to be selectively made to conform, each of the excursions of rotation having substantially the same duration as the selectively generated one electrically varying signal; and controlling the voltage applied to the winding stages in the commutating step so that the applied voltage varies as a function of the one electrically varying signal, the one signal being variable over many commutation periods in accordance with the selected waveshape substantially independently from any variation of the applied voltage during any one of the commutation periods.
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64. A method of operating an electronically commutated motor including a stationary assembly having a plurality of winding stages associated therewith and adapted to be selectively commutated, and rotatable means associated with the stationary assembly in selective magnetic coupling relation with the winding stages, the method comprising the steps of:
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commutating the winding stages by applying a voltage thereto in at least one preselected sequence during successive commutation periods thereby to produce a torque and drive the rotatable means in forward and reverse excursions of rotation; selectively generating one of a plurality of electrically varying signals, corresponding to one of a plurality of waveshapes to which the torque during the excursions of rotation is to be selectively made to conform, each of the excursions of rotation having substantially the same duration as the selectively generated one electrically varying signal; and controlling the voltage applied to the winding stages in the commutating step so that the current flowing in the winding stages as a result of the applied voltage varies as a function of the one electrically varying signal, the one signal being variable over many commutation periods in accordance with the selected waveshape substantially independently from any variation of the applied voltage during any one of the commutation periods.
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73. A laundry apparatus comprising:
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means operable generally in a washing mode for agitating water and fabrics to be laundered therein and operable generally in a spin mode for thereafter spinning the fabrics to effect centrifugal displacement of water from the fabrics; an electronically commutated motor including a stationary assembly, a multi-stage winding arrangement associated with said stationary assembly and having a plurality of winding stages adapted to be commutated in a plurality of preselected sequences, and rotatable means rotatably associated with said stationary assembly and arranged in selective magnetic coupling relation with said winding stages for driving said agitating and spinning means in the washing mode operation and in the spin mode operation thereof upon the commutation of said winding stages; means for commutating winding stages during successive commutation periods by applying a voltage thereto in one of the preselected sequences to effect the spin mode operation of the agitating and spinning means and by applying the voltage thereto in both the one preselected sequence and another preselected sequence to effect the washing mode operation of said agitating and spinning means; means for controlling the voltage applied to said winding stages by said commutating means so that the applied voltage varies as a function of an input signal thereto; and means for selectively generating one at a time of a plurality of electrically varying signals respectively corresponding to selected waveshapes to which the agitation and spinning of said agitating and spinning means are to be made to conform during the washing and spin mode operations thereof, as the input signal to said controlling means, the input signal being variable over many commutation periods in accordance with the selected waveshapes substantially independently from any variation of the applied voltage during each of the commutation periods.
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77. An apparatus comprising in combination:
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at least one rotatable device for being driven in opposite directions; an electronically commutated motor including a stationary assembly having a plurality of winding stages associated therewith and adapted to be selectively commutated, and rotatable means associated with said stationary assembly in selective magnetic coupling relation with said winding stages and adapted for driving said at least one rotatable device upon the electronic commutation of said winding stages; means for commutating said winding stages by applying a voltage thereto in at least one preselected sequence during successive commutation periods; means for controlling the voltage applied to said winding stages by said commutating means so that the applied voltage varies as a function of an input signal thereto; and means for selectively generating one of a plurality of electrically varying signals corresponding to one of a plurality of waveshapes to which rotation of said at least one rotatable device is to be selectively made to conform in at least one direction, as the input signal to said controlling means, the rotation of said at least one rotatable device in that direction having substantially the same duration as the selectively generated one electrically varying signal, the input signal being variable over many commutation periods in accordance with the selected waveshape substantially independently from any variation of the applied voltage during any one of the commutation periods.
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82. A control circuit for a system including an electronically commutated motor having a stationary assembly having a plurality of winding stages associated therewith and adapted to be selectively commutated, and rotatable means associated with the stationary assembly in selective magnetic coupling relation with the winding stages, and further including means for commutating the winding stages by applying a voltage thereto in at least one preselected sequence during successive commutation periods thereby to drive the rotatable means in oppositely directed excursions of rotation, the control circuit comprising:
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means for controlling the voltage applied to the winding stages by the commutating means so that the current flowing in the winding stages as a result of the applied voltage varies as a function of an input signal to the controlling means; and means for selectively generating one of a plurality of electrically varying signals, corresponding to one of a plurality of waveshapes to which the current flowing in the winding stages during the excursions of rotation is to be selectively made to conform, as the input signal to said controlling means, the input signal being variable over many commutation periods in accordance with the selected waveshape substantially independently from any variation of the applied voltage during any one of the commutation periods.
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85. A control circuit for a system including an electronically commutated motor having a stationary assembly having a plurality of winding stages associated therewith and adapted to be selectively commutated, and rotatable means associated with the stationary assembly in selective magnetic coupling relation with the winding stages and further including means for commutating the winding stages by applying a voltage thereto in at least one preselected sequence during successive commutation periods thereby to drive the rotatable means in oppositely directed excursions of rotation, the control circuit comprising:
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means for controlling the voltage applied to the winding stages by the commutating means so that the applied voltage varies as a function of an input signal thereto; and means for selectively generating one of a plurality of electrically varying signals, corresponding to one of a plurality of waveshapes to which the excursions of rotation are to be selectively made to conform, as the input signal to said controlling means, the input signal being variable over many commutation periods in accordance with the selected waveshape substantially independently from any variation of the applied voltage during any one of the commutation periods.
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88. A control circuit for a system including an electronically commutated motor having a stationary assembly having a plurality of winding stages associated therewith and adapted to be selectively commutated, and rotatable means associated with the stationary assembly in selective magnetic coupling relation with the winding stages and further including means for commutating the winding stages by applying a voltage thereto in at least one preselected sequence during successive commutation periods thereby to drive the rotatable means in oppositely directed excursions of rotation, the control circuit comprising:
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means for controlling the voltage applied to the winding stages by the commutating means so that the applied voltage varies as a function of an input signal thereto; means for providing a signal at a rate corresponding to angular velocity of the rotatable means to the commutation means to cause the commutation means to progress through the at least one preselected sequence; and means for electrically storing sets of values corresponding to points on a plurality of waveshapes to which the excursions of rotation are to be selectively made to conform, and for selecting one of the sets of values and scaling the values, and successively supplying the scaled values of the selected one set as the input signal to said controlling means, the scaled values being supplied at a controlled rate independent of the angular velocity of the rotatable means.
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91. An electronically commutated motor system comprising:
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an electronically commutated motor including a stationary assembly having a plurality of winding stages associated therewith and adapted to be selectively commutated, and rotatable means associated with said stationary assembly in selective magnetic coupling relation with said winding stages; means for commutating said winding stages by applying a voltage thereto in at least one preselected sequence during successive commutation periods thereby to drive said rotatable means in forward and reverse excursions of rotation; means for providing a signal at a rate corresponding to angular velocity of the rotatable means to the commutation means to cause the commutation means to progress through the at least one preselected sequence; means for controlling the voltage applied to said winding stages by the commutating means so that the applied voltage varies as a function of a first input signal and for also substantially limiting the maximum current flowing in the winding stages to a value which is a function of a second input signal; and means for selectively generating two of a plurality of electrical signals as the first and second input signals to said controlling means, the first input signal corresponding to one of a plurality of waveshapes to which the excursions of rotation are to be selectively made to conform, the first input signal being variable over many commutation periods in accordance with the selected waveshape substantially independently from any variation of the applied voltage during any one of the commutation periods.
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Specification