Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
89 words
In a power conditioner for providing a D.C. output voltage from a rectified A.C. input voltage source which comprises voltage output means and an inductor with a high permeability core, through which ripple current flows, which is coupled between said input voltage source and said voltage output means, the improvement comprising current control means for varying the magnitude of the peak-to-peak value of said ripple current in direct proportion to the magnitude of said instantaneous rectified input voltage such that the power conditioner draws a substantially sinusoidal input current.
Claim 2
Dependent Claim
89 words
In a power conditioner for providing a D.C. output voltage from a rectified A.C. input voltage source which comprises voltage output means and an inductor with a high permeability core, through which ripple current flows, which is coupled between said input voltage source and said voltage output means, the improvement comprising current control means for varying the magnitude of the peak-to-peak value of said ripple current in direct proportion to the magnitude of said instantaneous rectified input voltage such that the power conditioner draws a substantially sinusoidal input current.
Claim 3
Dependent Claim
19 words
In a power conditioner as claimed in claim 1, the improvement wherein said voltage output means comprises switching means.
Claim 4
Dependent Claim
88 words
In a power conditioner as claimed in claim 2 wherein said power conditioner supplies an output voltage and said current control means comprises a reference voltage, the improvement comprising comparison means for comparing said output voltage and said reference voltage, and for suppling an analog error signal representative of the difference of said output voltage and said reference voltage, and analog-to-digital converter means coupled to said comparison means to receive said analog error signal and to said switching means for controlling the switching frequency of said switching means.
Claim 5
Dependent Claim
51 words
In a power conditioner as claimed in claim 3, the further improvement wherein said analog-to-digital converter means comprises a sampling converter means and said power conditioner comprises sample control means coupled to receive the A.C. input signal for supplying a sampling signal upon each zero crossing of the A.C. input signal.
Claim 6
Dependent Claim
35 words
In a power conditioner as claimed in claims 3 or 4, the further improvement wherein said comparison means comprises a proportional integral controller which receives said analog error signal and produces a digital error signal.
Claim 7
Dependent Claim
147 words
In a power conditioner as claimed in claim 5 the further improvement wherein said switching means comprises a switch connected in shunt with said inductor and that has a control terminal and said power conditioner further comprises regulating means coupled to said comparison means and to receive said instantaneous rectified input voltage and said digital error signal which comprises amplifier means for providing a turn-on output signal and a turn-off output signal, both of which have substantially the waveform as said rectified input signal, but which are of different amplitudes, measuring means coupled to said inductor and said amplifier means for providing an inductor signal representative of the instantaneous current flowing in said inductor, and on-off means coupled to said amplifier means and to said switching means for controlling the switching of said switching means in response to said inductor signal and said turn-on and turn-off signals.
Claim 8
Dependent Claim
22 words
In a power conditioner as claimed in any of the preceding claims the improvement wherein said output means comprises output filter means.