US3732507A — Ac power supply having computer controlled freque…

Claim 1

Independent Claim 83 words

A AC power supply comprising, signal generating means for providing at least two AC signals simultaneously having the same frequency that is selectively controlled with a constant phase difference between said signals for all frequencies, phase control means for combining said simultaneously generated pair of AC signals by utilizing said phase difference between said signals into an output signal having a phase independent of said frequency, and amplitude means for setting the amplitude of said output signal independent of the frequency and phase.

Claim 2

Dependent Claim 83 words

A AC power supply comprising, signal generating means for providing at least two AC signals simultaneously having the same frequency that is selectively controlled with a constant phase difference between said signals for all frequencies, phase control means for combining said simultaneously generated pair of AC signals by utilizing said phase difference between said signals into an output signal having a phase independent of said frequency, and amplitude means for setting the amplitude of said output signal independent of the frequency and phase.

Claim 3

Dependent Claim 64 words

A programmable power supply as claimed in claim 1 in which, said signal generating means having frequency synthesizing means responsive to input signals for providing said AC signals with a selected frequency, and fast range change means for increasing the speed of response of said frequency synthesizing means in providing AC signals having a different frequency in response to changes in the input signals.

Claim 4

Dependent Claim 75 words

An AC power supply as claimed in claim 1 in which, said signal generating means comprising oscillator means for generating AC signals having a given constant phase difference therebetween, said oscillator means includes switch means for switching resistance and capacitance into said oscillator circuit and changing the frequency of said AC signals, and fast range change means for increasing the response time of said oscillator means when said capacitance is switched into said oscillator means.

Claim 5

Dependent Claim 40 words

A power supply as claimed in claim 3 in which, said oscillator means including an operational amplifier, and said fast range change means including means for injecting current into the input of said operational amplifier when said capacitance is switched.

Claim 6

Dependent Claim 57 words

A power supply as claimed in claim 4 in which, said fast range change means including means for detecting a decrease in the output of said operational amplifier, and comparator means for comparing said decreased output with a DC reference voltage and energizing a current connecting network that injects current into the input of said operational amplifier.

Claim 7

Dependent Claim 65 words

A AC power supply as claimed in claim 1 in which, said phase control means including at least a phase shift generator, said phase shift generator including means for shifting the phase spacing between said input signals to a given phase difference, and said phase shift generator having means for holding the amplitude of the output of said phase shift generator to a given magnitude.

Claim 8

Dependent Claim 40 words

A AC power supply as claimed in claim 6 including, a plurality of phase shift generators for shifting the phase spacing between said two AC signals from 100* increments to 1* increment and providing a single controlled phase output signal.

Claim 9

Dependent Claim 88 words

A AC power supply as claimed in claim 1 in which, said amplitude means including an amplifier responsive to input information signals for providing a given selected amplitude to the output signal supplied to the load, means for sensing the amplitude of said output signals supplied to the load and providing an error signal, and modulator means for amplitude modulating the output of said amplifier with said error signal and holding the amplitude of the output signal to the load to the amplitude of the input information signals.

Claim 10

Dependent Claim 93 words

A AC power supply as claimed in claim 8 in which, said sensing means including a feedback loop with a connecting isolation transformer for transferring the load amplitude signal to a sensing circuit, said sensing circuit including a second amplifier responsive to the input information signals and said load amplitude signal that provides an output in inverse correspondence with the input information signals, and comparator means for comparing said output to a given voltage reference and providing an error signal corresponding to amplitude error between the sensed load amplitude signal and the amplitude.

Claim 11

Dependent Claim 55 words

A AC power supply as claimed in claim 9 in which, said modulator means comprises an amplifier for amplifying the output of said amplifier, and means responsive to said error signal, for varying the input current to said amplifier, thereby increasing or decreasing the output of the amplifier in accordance with the input error signal.

Claim 12

Dependent Claim 91 words

A AC power supply as claimed in claim 1 including, second phase control means responsive to said AC signals for utilizing said phase difference for restructuring said AC signals into an output signal having a phase independent of frequency, and second amplitude means for setting the amplitude of said output signal independent of the phase and frequency, and said second phase control means and second amplitude means providing a given phase shift and amplitude to said AC signals to provide multiple phase output signals having the same frequency, phase and amplitude.

Claim 13

Dependent Claim 62 words

A AC power supply as claimed in claim 1 in which, said phase control means including a plurality of phase shift generating means, each of said phase shift generating means being responsive to a separate control signal for generating a separate digit of a programmed phase, and said shift generating means having means for combining said separate digits into a corresponding phase.

Claim 14

Dependent Claim 150 words

A AC power supply as claimed in claim 1 in which, said phase control means including a plurality of phase shift generating means, one of said phase shift generating means for generating phase signal outputs with a lower phase and a higher phase of a first group of equally separated phases, a second one of said phase shift generating means for generating a phase signal output between said lower and higher phases having a phase at the higher value therebetween, a third one of said phase shift generating means for generating a phase signal output between said lower and higher phases having a phase at the lower value therebetween, a fourth one of said phase shift generating means for generating a phase signal output between the upper and lower phase values, and said phase shift generating means having means for combining the separate phase outputs into a single phase output.

Claim 15

Dependent Claim 73 words

A AC power supply as claimed in claim 13 in which, said phase signal output of said fourth phase shift generating means being the most significant digit to a given base number, said upper and lower values being adjacent numbers of the given base number of the next most significant digit, and said lower phase and said higher phase being adjacent numbers of the given base number of the next most significant digit.

Claim 16

Dependent Claim 45 words

A AC power supply as claimed in claim 14 including, means for separately programming said one of said phase shift generating means, means for separately programming said second and third phase shift generating means, and means for separately programming said fourth phase shift generating means.

Claim 17

Dependent Claim 94 words

In an AC power supply for providing a controlled frequency signal with a fast response time, oscillator means having an amplifier for providing a selective frequency output signals, input means for controlling the frequency output of said oscillator, switch means responsive to said output signals for switching capacitance and resistance into the input circuit of said amplifier, and detector means for detecting the amplitude of the output signals of said oscillator means and injecting current into the input to said amplifier in response to detecting a drop in the amplitude of said output signals.

Claim 18

Dependent Claim 94 words

In an AC power supply for providing a controlled frequency signal with a fast response time, oscillator means having an amplifier for providing a selective frequency output signals, input means for controlling the frequency output of said oscillator, switch means responsive to said output signals for switching capacitance and resistance into the input circuit of said amplifier, and detector means for detecting the amplitude of the output signals of said oscillator means and injecting current into the input to said amplifier in response to detecting a drop in the amplitude of said output signals.

Claim 19

Independent Claim 88 words

The method of providing an AC power supply having independently controlled frequency, phase and amplitude comprising the steps of, simultaneously generating at least two signals having the same frequency with a constant phase difference therebetween, shifting the relative phase of said two input signals, while adjusting their relative amplitude and summing the signals to provide an output signal having a constant amplitude and a selected phase irrespective of frequency, and setting the amplitude of the output signals to a given amplitude that is independent of phase and frequency.

Claim 20

Independent Claim 88 words

The method of providing an AC power supply having independently controlled frequency, phase and amplitude comprising the steps of, simultaneously generating at least two signals having the same frequency with a constant phase difference therebetween, shifting the relative phase of said two input signals, while adjusting their relative amplitude and summing the signals to provide an output signal having a constant amplitude and a selected phase irrespective of frequency, and setting the amplitude of the output signals to a given amplitude that is independent of phase and frequency.

Claim 21

Dependent Claim 49 words

In the method claimed in claim 17, the steps of, sensing the amplitude of the output signal supplied to a load relative to the amplitude and providing an error signal, and modulating said error signal with said output signal in amplitude modulation to correct errors in the output signal.

Claim 22

Dependent Claim 26 words

In the method claimed in claim 18 including the step of, sensing the amplitude of the output signal for said error signal through an isolation transformer.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1976-05-07	1976-11-06	1977-05-08	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1980-05-07	1980-11-06	1981-05-08	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1984-05-07	1984-11-06	1985-05-08	$7700.00	Window Closed / Lapsed

Ac power supply having computer controlled frequency and phase and amplitude

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