Starting control circuit for a multispeed A.C. motor
First Claim
1. A starting control circuit for connecting a multispeed alternating current motor having at least two run windings and at least two start windings and a mechanical rotational output to an alternating current source comprising;
- speed selector means for connecting one of said run windings and start windings to said alternating current source;
speed selector sensing means connected to said speed selector means for sensing the connection determined by said speed selector means and for producing a speed selection signal indicative thereof;
sensor means coupled to the mechanical rotational output for directly sensing a predetermined amount of rotational movement of the mechanical rotational output and for producing a sensor signal indicative thereof;
pulse rate selector means responsive to said speed selection signal and to said sensor signal for producing a pulse rate signal;
start controller means responsive to said pulse rate signal for producing a control signal; and
energizing means connected to said start windings and responsive to said control signal for connecting and disconnecting said alternating current source to said selected one of said start windings in response to the control signal of said start controller means.
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Accused Products
Abstract
This disclosure depicts a starting control circuit for a multispeed alternating current motor having at least two run windings and at least two start windings and a mechanical rotational output. The circuit comprises:
an alternating current source;
speed selector means for connecting one of the run windings and start windings to the alternating current source;
speed selector sensing means connected to the speed selector means for sensing the connection determined by the speed selector means and for producing a speed selection signal indicative thereof;
sensor means for sensing a predetermined amount of rotational movement of the mechanical rotational output and for producing a sensor signal indicative thereof;
pulse rate selector means responsive to the speed selection signal and to the sensor signal for producing a pulse rate signal;
start controller means responsive to the pulse rate signal for producing a control signal;
energizing means connected to the start windings and responsive to the control signal for connecting and disconnecting the alternating current source to the selected one of the start windings in response to the control signal of the start controller means.
76 Citations
23 Claims
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1. A starting control circuit for connecting a multispeed alternating current motor having at least two run windings and at least two start windings and a mechanical rotational output to an alternating current source comprising;
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speed selector means for connecting one of said run windings and start windings to said alternating current source; speed selector sensing means connected to said speed selector means for sensing the connection determined by said speed selector means and for producing a speed selection signal indicative thereof; sensor means coupled to the mechanical rotational output for directly sensing a predetermined amount of rotational movement of the mechanical rotational output and for producing a sensor signal indicative thereof; pulse rate selector means responsive to said speed selection signal and to said sensor signal for producing a pulse rate signal; start controller means responsive to said pulse rate signal for producing a control signal; and energizing means connected to said start windings and responsive to said control signal for connecting and disconnecting said alternating current source to said selected one of said start windings in response to the control signal of said start controller means. - View Dependent Claims (2, 3, 4, 5)
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6. A starting control circuit for connecting a two-speed alternating current motor having two run windings and two start windings and a mechanical rotational output to an alternating current source comprising;
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speed selector means for connecting one of said run windings and start windings to said alternating current source; speed selector sensing means connected to said speed selector means for sensing the connection determined by said speed selector means and for producing a speed selection signal indicative thereof; sensor means for sensing a predetermined amount of rotational movement of the mechanical rotational output and for producing a sensor signal indicative thereof; pulse rate selector means responsive to said speed selection signal and to said sensor signal for producing a pulse rate signal; start controller means responsive to said pulse rate signal for producing a control signal; a first start switch connected to one of said start windings and a second start switch connected to the other of said start windings responsive to said control signal for connecting and disconnecting said alternating current source to said start windings; an output selector means connected to said start controller means and responsive to said speed selection signal for selecting one of said first and second start switches, said output selector means applying said control signal to said selected start switch. - View Dependent Claims (7, 8, 9, 10)
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11. A starting control circuit for connecting a two-speed alternating current motor having two run windings and two start windings and a mechanical rotational output to an alternating current source comprising;
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speed selector means for connecting one of said run windings and start windings to said alternating current source; speed selector sensing means connected to said speed selector means for sensing the connection determined by said speed selector means and for producing a speed selection signal indicative thereof; sensor means coupled to the mechanical rotational output for directly sensing a predetermined amount of rotational movement of the mechanical rotational output and for producing a sensor signal indicative thereof; pulse rate selector means responsive to said speed selection signal and to said sensor signal for producing a pulse rate signal; start controller means responsive to said pulse rate signal for producing a control signal; a start switch connected to said start windings and responsive to said control signal for connecting and disconnecting said alternating current source to said start windings in response to the control signal of said start controller means. - View Dependent Claims (12, 13, 14)
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15. An electronic starting control circuit for connecting a multispeed alternating current motor having at least two start windings and a mechanical rotational output to an alternating current source comprising:
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speed selector means to select one of the available speeds and a corresponding start winding for operation, sensor means for sensing the rotational movement of the mechanical rotational output and for producing a sensor signal indicative thereof, switch means in circuit with the selected start winding to electrically energize said winding, and control means in circuit with the speed selector means, sensor means, and switch means for determining when the mechanical rotational output has reached a predetermined portion of the selected speed and switching the selected start winding in response thereto. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. An electronic starting control circuit for connecting a multispeed alternating current motor having at least two start windings and a mechanical rotational output to an alternating current source comprising:
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means to select one of said speeds for operation, means to switch said start windings in and out of circuit, and means coupled to the mechanical rotational output to directly sense the speed of the mechanical rotational output, said switching means being responsive to at least the speed sensing means and having means to switch the power to said start windings at a pre-determined proportion of the selected speed. - View Dependent Claims (23)
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Specification