Electronic motor that includes an electronic waveform synthesizer and the synthesizer per se
AssigneeMassachusetts Institute of Technology
InventorsJames L. Kirtley, Jr., Richard H. Baker
Life of this patent
Estimating the term…
Abstract
An electronic motor that accepts single-phase power and converts the same to polyphase power which is delivered to a polyphase winding of the machine. The electronic motor includes an electronic synthesizer. The synthesizer is shown in the context of an electronic motor, but in a wider context as well.
Claims19
An electronic motor that comprises, in combination, a polyphase winding, at least one phase of the winding being adapted to connect directly across an incoming power line and at least one other phase of the winding being adapted to connect through control means to the power line, said control means comprising rectifier means, capacitance means, bilateral switch means, and logic means, the switch means serving to control the output of the rectifier means, and the logic means serving to control the bilateral switch means to establish a controllable phase shift between the power line voltage and the voltage applied to said at least one other phase.
Apparatus that comprises, in combination, a polyphase load, at least one phase of the polyphase load being adapted to connect directly across an incoming power line and at least one other phase of the polyphase load being adapted to connect through control means to the power line, said control means comprising rectifier means, capacitance means, bilateral switch means, and logic means, the switch means serving to control the output of the rectifier means, the logic means serving to control the bilateral switch means to establish a controllable phase shift between the power line voltage and the voltage applied to said at least one other phase.
An electronic waveform synethesizer that comprises, in combination:
- a plurality of stages connected in cascade, each stage comprising d-c or unidirectional supply voltage means, and bilateral stage switch means, the bilateral stage switch means serving to determine whether electric current flows into or out of the d-c or unidirectional supply voltage means of each phase and serving, as well, to effect an electrical bypass of the d-c or unidirectional supply voltage means of the stage in a programmable fashion;
- electronic mixer means connected to receive the output from the plurality of stages, said electronic mixer means comprising a plurality of bilateral mixer switch means that receives the d-c or unidirectional electric potential of the d-c or unidirectional supply voltage means of one or more of the stages and is operable to reverse the polarity thereof in a determined and programmable fashion so that the output of the electronic waveform synthesizer is alternating in nature even though the supply voltage means of said stages is d-c or unidirectional in nature;
- and control logic means that serves to activate the bilateral stage switch means and the bilateral mixer switch means in a programmable fashion.
An electronic waveform synthesizer that comprises, in combination:
- at least one stage comprising d-c or unidirectional supply voltage means and bilateral stage switch means, the bilateral stage switch means serving to determine whether electric current flows into or out of the d-c or unidirectional supply voltage means of each phase and serving, as well, to effect an electrical bypass of the d-c or unidirectional supply voltage means of the stage in a programmable fashion;
- electronic mixer means connected to receive the output from the at least one stage, said electronic mixer means comprising bilateral mixer switch means that receives d-c or unidirectional electric potential of the d-c or unidirectional supply voltage means of the at least one stage and is operable to reverse the polarity there-of in a determined and programmable fashion so that the output of the electronic waveform synthesizer is alternating in nature even though the supply voltage means of said at least one stage is d-c or unidirectional in nature;
- and control logic means that serves to activate the bilateral stage switch means and the bilateral mixer switch means in a programmable fashion.
An electronic waveform synthesizer that comprises, in combination:
- an electric stage comprising d-c or unidirectional supply voltage means and bilateral stage switch means, the bilateral stage switch means serving to control electric current flow of the d-c or unidirectional supply voltage means of the stage and serving, as well, to effect an electrical bypass of the d-c or unidirectional supply voltage means of the stage in a programmable fashion;
- electronic mixer means connected to receive the output from the stage, said electronic mixer means comprising a plurality of bilateral mixer switch means connected to receive the d-c or unidirectional electric potential of the d-c or unidirectional supply voltage means of the stage and operable to process the same in a determined and programmable fashion so that there appears at the output port of the electronic waveform synthesizer a waveform that is alternating in nature even though the supply voltage means of said stage is d-c or unidirectional in nature;
- and control logic means that serves to activate the bilateral stage switch means and the bilateral mixer switch means in a programmable fashion.
An electronic rotating machine that comprises a plurality of electronic waveform synthesizers connected to provide a polyphase output and a rotating electric machine connected to receive said output and to be powered thereby, each synthesizer of said plurality including, in combination:
- an electric stage comprising d-c or unidirectional supply voltage means and bilateral stage switch means, the bilateral stage switch means serving to control electric current flow of the d-c or unidirectional supply voltage means of the stage and serving, as well, to effect an electrical bypass of the d-c or unidirectional supply voltage means of the stage in a programmable fashion;
- electronic mixer means connected to receive the output from the stage, said electronic mixer means comprising a plurality of bilateral mixer switch means connected to receive the d-c or unidirectional electric potential of the d-c or unidirectional supply voltage means of the stage and operable to process the same in a determined and programmable fashion so that there appears at the output port of the electronic waveform synthesizer a waveform that is alternating in nature even though the supply voltage means of said stage is d-c or unidirectional in nature;
- and control logic means that serves to activate the bilateral stage switch means and the bilaterial mixer switch means in a programmable fashion.
Dependencies are inferred from the claim text.