DC power backup
First Claim
Patent Images
1. A battery backup apparatus connected with a movable barrier operator which includes a DC power supply, the battery backup apparatus comprising:
- a battery;
a battery charging circuit coupled to the battery; and
a conduction path between the battery and the movable barrier operator, the conduction path including a unidirectional isolation device,the battery backup apparatus configured to connect to a plug of the movable barrier operator, and the battery charging circuit configured to receive a DC voltage from the DC power supply located within the movable barrier operator through the plug and an impedance element in parallel with a second unidirectional isolation device disposed in the movable barrier operator to charge the battery when the DC voltage from the DC voltage supply exceeds a predetermined voltage,the battery backup apparatus further configured to provide a battery backup voltage through the second unidirectional isolation device, the plug, and the unidirectional isolation device, the battery backup voltage being provided from the battery when mains voltage to the movable barrier operator fails.
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Abstract
A barrier movement operator with a backup source of DC power is disclosed. The power supply of the barrier movement operator sends current limited DC to the backup which uses the DC to charge a battery. The battery is in circuit at all times with the barrier movement operator power supply by means of a power diode and, when an AC mains power failure occurs, DC power is sent from the battery to power the barrier movement operator.
41 Citations
24 Claims
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1. A battery backup apparatus connected with a movable barrier operator which includes a DC power supply, the battery backup apparatus comprising:
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a battery; a battery charging circuit coupled to the battery; and a conduction path between the battery and the movable barrier operator, the conduction path including a unidirectional isolation device, the battery backup apparatus configured to connect to a plug of the movable barrier operator, and the battery charging circuit configured to receive a DC voltage from the DC power supply located within the movable barrier operator through the plug and an impedance element in parallel with a second unidirectional isolation device disposed in the movable barrier operator to charge the battery when the DC voltage from the DC voltage supply exceeds a predetermined voltage, the battery backup apparatus further configured to provide a battery backup voltage through the second unidirectional isolation device, the plug, and the unidirectional isolation device, the battery backup voltage being provided from the battery when mains voltage to the movable barrier operator fails. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A battery backup apparatus in combination with a movable barrier operator, the combination comprising:
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a movable barrier operator, the movable barrier operator comprising; a DC voltage supply having a mains input voltage, the mains input voltage receiving a mains voltage; a barrier movement control coupled to the DC voltage supply via a DC power connection; an operator conductive path connected between the DC voltage supply and a plug, the conductive path including an operator unidirectional isolation device in parallel with an impedance element; the plug coupled to the conductive path, the plug externally accessible from the movable barrier operator; a battery backup apparatus comprising; a battery having first and second terminals; a battery unidirectional isolation device operatively coupled between the battery and a battery conducting path configured to electrically connect to the plug; and a battery charging circuit configured to receive a DC voltage from the DC voltage supply via the plug, wherein the battery charging circuit is configured to charge the battery when the DC voltage from the DC voltage supply exceeds a predetermined voltage, wherein the battery is connected to provide a battery DC voltage from the first battery terminal to the DC voltage supply via the battery unidirectional isolation device, the plug, and the operator unidirectional isolation device such that a magnitude of the battery DC voltage is conducted along the operator conduction path without being substantially adjusted by any other intervening electrical device along the operator conduction path when mains voltage to the mains voltage input fails. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A battery backup apparatus in combination with a movable barrier operator, the combination comprising:
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a movable barrier operator, the movable barrier operator comprising; a DC voltage supply having a mains input voltage, the mains input voltage receiving a mains voltage; a barrier movement control coupled to the DC voltage supply via a DC power connection; an operator conductive path connected between the DC voltage supply and a plug, the conductive path including an operator unidirectional isolation device connected in parallel with an impedance element; the plug coupled to the conductive path, the plug externally accessible from the movable barrier operator; a battery backup apparatus comprising; a battery having first and second terminals; a battery unidirectional isolation device operatively coupled between the battery and a battery conducting path configured to electrically connect to the plug; a battery charging circuit configured to receive a DC voltage from the DC voltage supply via the plug, wherein the battery charging circuit is configured to charge the battery when the DC voltage from the DC voltage supply exceeds a predetermined voltage, wherein the battery is connected to provide a battery DC voltage from the first battery terminal to the DC voltage supply via the battery unidirectional isolation device, the plug, and the operator unidirectional isolation device when mains voltage to the mains voltage input fails. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification