Dropping impedance power supply
AssigneeEmerson Electric Co.
InventorCiarán S. Ó Bréartúin
Life of this patent
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Abstract
A dropping impedance power supply comprising a motor is series with a voltage regulator. When the motor operates, the power supply transforms an a.c. line voltage to a d.c. voltage. The motor drops the line voltage, and the voltage regulator clamps the voltage across the voltage regulator at approximately the d.c. voltage.
Claims28
A dropping impedance power supply for transforming an a.c. line voltage to a d.c. voltage, said power supply comprising:
- a motor for dropping said line voltage to a first predetermined level;
- a voltage regulator connected in series with said motor, said voltage regulator clamps a voltage across said voltage regulator to a second predetermined level for said d.c. voltage;
- and
- a dropping impedance connected in parallel with said motor.
A dropping impedance power supply for transforming an a.c. line voltage to a d.c. voltage, said power supply comprising:
- a dropping impedance element comprising a motor capable of being switched on and off connected in parallel with a capacitor;
- a voltage regulator connected in series with said dropping impedance element.
A power supply for transforming an a.c. line voltage to a d.c. voltage for an electronic controller of an appliance comprising:
- a dropping impedance element comprising a load having a current approximately equal to an amount of current required by said electronic controller, said load providing an operational function for said appliance;
- and
- a voltage regulator connected in series with said dropping impedance element.
A power supply for transforming an a.c. line voltage to a d.c. voltage having a predetermined voltage level comprising:
- a motor for dropping said line voltage to said predetermined voltage level, said motor capable of being switched between an operating state and a not operating state, when said motor is in said operating state a motor current flowing through said motor, said motor current being sufficient to operate an electronic controller for an appliance when said appliance is operating;
- and
- a voltage regulator for clamping a voltage across said voltage regulator at said predetermined voltage level.
Dependencies are inferred from the claim text.