No-break power supply system

• US 4,686,379 A
• Filed: 06/18/1986
• Issued: 08/11/1987
• Est. Priority Date: 12/24/1985
• Status: Expired due to Fees

• Current Assignee: Eikoh Giken Company Limited
• Original Assignee: Eikoh Giken Company Limited
• Inventors: Ohnari, Eiji
• Primary Examiner(s): Shoop, Jr., William M.
• Assistant Examiner(s): Logan, Sharon D.
• Application Number:
  US06/875,498
• Time in Patent Office: 419 Days
• Field of Search: 307/64, 307/65, 307/66, 307/67, 307/68, 307/52, 307/60, 307/47, 307/78, 307/82, 307/84, 307/86, 317/26, 340/292
• US Class Current: 307/66
• CPC Class Codes: H02J 9/066 characterised by the use of dynamo-electric machines H02J9/08 takes precedence
• CPC Class Codes: H02J 9/08 requiring starting of a prime-mover

Abstract

A no-break power supply system for use in a computer power supply source is disclosed. The system comprises a switch connected to a main or commerical power supply source and having first and second contacts, a first rectifier means connected to the switch through an overcurrent breaker, an inverter connected to the first rectifier means for supplying an output with constant voltage and constant frequency to a load, an emergency generator means connected to the switch for generating a supply voltage in the case of service interruption or failure of components, a second rectifier means connected in parallel with a series combination of the switch, the overcurrent breaker and the first rectifier, and a voltage relay means connected between the emergency generator means and the emergency battery means and for triggering the emergency generator means.

Claims

1. A no-break power supply system comprising a switch connected to a main or commercial power supply source and having first and second contacts, a first rectifier means connected to the switch through an overcurrent breaker, an inverter connected to the first rectifier means for supplying an output with constant voltage and constant frequency to a load, an emergency generator means connected to the switch for generating a supply voltage in the case of service interruption or failure of components, an emergency battery means connected between the input of the inverter and a ground for supplying a voltage for short duration in the case of service interruption or failure of components, a second rectifier means connected in parallel with a series combination of the switch, the overcurrent breaker and the first rectifier, and a voltage relay means connected between the emergency generator means and the emergency battery means for starting up the emergency generator means in the event of a service interruption.

2. A no-break power supply system as claimed in claim 1, wherein the emergency generator means comprises an engine-generator connected to the second contact of the switch, an engine operating means connected to the engine for driving the engine-generator, and an undervoltage relay connected between the main supply source and the engine operating means for triggering the engine operating means.

3. A no-break power supply system as claimed in claim 1, wherein The first and second rectifier means serve also as a floating charge means for the emergency battery means.

8. A no-break power supply system as claimed in claim 1 or 4, wherein the load is a computer.

4. A no-break power supply system comprising a first rectifier means connected to a main or commercial supply source, an inverter connected to the first rectifier through an overcurrent breaker and for supplying an output with constant voltage and constant frequency to a load, an emergency generator means connected between the main supply source and the inverter for generating a supply voltage for long duration in the case of service interruption or failure of components, an emergency battery means connected between the input of the inverter and a ground for supplying a voltage for short duration in the case of service interruption or failure of components, a floating charge means connected to a junction point of the first rectifier means, the emergency generator means and the inverter, an emergency battery means connected between the floating charge means and a ground for supplying a voltage for short duration in the case of service interruption or failure of components, and an undervoltage relay means connected between the emergency generator means and the emergency battery means for starting up the emergency generator means, in the event of a service interruption.

5. A no-break power supply system as claimed in claim 4, wherein The emergency generator means comprises an engine-generator driven at speed two times the rated speed, an engine operating means connected to the engine for driving the engine-generator, an undervoltage relay connected between the main supply source and the engine operating means for triggering the engine operating means, a second rectifier means connected to the output of the generator, and a series combination of a first diode and an overcurrent breaker which is connected between the second rectifier means and the inverter.

6. A no-break power supply system as claimed in claim 4, wherein, the floating charge means comprises a second diode connected be-tween the inverter means and the emergency battery means with antipolarity, and a current limiter connected between the first rectifier means and the emergency battery means in such a manner that it is connected in parallel with the second diode, and a DC voltage meter connected to the current limiter.

7. A no-break power supply system as claimed in claim 4, wherein the first rectifier means serves also as a floating charge means for the emergency battery means.