Stabilizing power source apparatus
First Claim
1. A power source apparatus for generating both a stabilized DC power output voltage and a stabilized AC power load current comprising:
- transformer means including a primary coil, a first secondary coil and a second secondary coil, wherein the first and second secondary coil are magnetically coupled to said primary coil, and the primary coil receives a DC input voltage;
switching means connected to the primary coil of the transformer means for switching the DC input voltage supplied to the primary coil;
means connected between the first secondary coil and a DC load for converting an output voltage of the first secondary coil into a DC output voltage;
DC output detecting means responsive to the converting means for generating a first control signal in response to the DC output voltage;
AC output detecting means coupled to the second secondary coil to which an AC load is coupled, for detecting the AC load current flowing to the AC load and for generating a second control signal in response to the AC voltage;
DC output voltage stabilizing means connected to the DC output detecting means for stabilizing the DC output voltage in response to the first control signal;
AC load current stabilizing means connected to the AC output detecting means for stabilizing the AC load current regardless of the AC load; and
wherein said AC load current stabilizing means includes switching frequency control means connected to the AC output detecting means for controlling the frequency of switching of the switching means in response to the second control signal to stabilize the AC load current and impedance means connected between the second secondary coil and the AC load for controlling the AC load current by varying the impedance according to the frequency of the signal generated on the second secondary coil.
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Abstract
A stabilizing power source apparatus includes a transformer with one primary and two secondary coils, a switching transistor, first and second differential amplifiers, an oscillator, and a pulse modulator. The oscillator generates a triangular wave of variable frequency. The modulator changes the pulse width and frequency of its output in accordance with a shift of a crossing point between the leading ramp of the triangular wave and the signal from the first differential amplifier. The pulse drives the switching transistor, so that the duty factor of the transistor stabilizes a DC output voltage and a switching frequency thereof stabilizes an AC output voltage. Another stabilizing power source apparatus includes a saturable reactor for stabilizing the DC output voltage and a resonance type inverter to generate a sinusoidal wave voltage.
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Citations
15 Claims
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1. A power source apparatus for generating both a stabilized DC power output voltage and a stabilized AC power load current comprising:
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transformer means including a primary coil, a first secondary coil and a second secondary coil, wherein the first and second secondary coil are magnetically coupled to said primary coil, and the primary coil receives a DC input voltage; switching means connected to the primary coil of the transformer means for switching the DC input voltage supplied to the primary coil; means connected between the first secondary coil and a DC load for converting an output voltage of the first secondary coil into a DC output voltage; DC output detecting means responsive to the converting means for generating a first control signal in response to the DC output voltage; AC output detecting means coupled to the second secondary coil to which an AC load is coupled, for detecting the AC load current flowing to the AC load and for generating a second control signal in response to the AC voltage; DC output voltage stabilizing means connected to the DC output detecting means for stabilizing the DC output voltage in response to the first control signal; AC load current stabilizing means connected to the AC output detecting means for stabilizing the AC load current regardless of the AC load; and wherein said AC load current stabilizing means includes switching frequency control means connected to the AC output detecting means for controlling the frequency of switching of the switching means in response to the second control signal to stabilize the AC load current and impedance means connected between the second secondary coil and the AC load for controlling the AC load current by varying the impedance according to the frequency of the signal generated on the second secondary coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification