Multiple power sources control system

• US 6,768,225 B2
• Filed: 08/30/2001
• Issued: 07/27/2004
• Est. Priority Date: 08/30/2001
• Status: Expired due to Fees

• Current Assignee: DIGI Power Manufacturing Incorporated
• Original Assignee: DIGI Power Manufacturing Incorporated
• Inventors: Huang, Min-Huang, Chang, Herlin
• Primary Examiner(s): DEBERADINIS, ROBERT L
• Application Number:
  US09/941,604
• Publication Number:
  US 20030042798A1
• Time in Patent Office: 1,062 Days
• Field of Search: 307/18, 307/24, 307/29, 307/31, 307/65, 307/80, 307/85
• US Class Current: 307/65
• CPC Class Codes: H02J 2310/58 The condition being electrical
• CPC Class Codes: H02J 3/144 Demand-response operation of the power transmission or distribution network
• CPC Class Codes: H02J 3/38 Arrangements for parallely feeding a single network by two or more generators, converters or transformers
• CPC Class Codes: H02J 9/06 with automatic change-over , e.g. UPS systems

Abstract

A multiple power sources control system has several power input sides can switch a power source to other power sources of power input sides as original power source of one of power input sides has an abnormal phenomenon (such as no power supply, too low or high voltage and abnormal frequency, etc.) such that loads can keep obtaining supplied power. In addition, power of loads has better protection because of multiple input power supply.

Claims

1. A first multiple power sources control system, switching an originally used power source having an abnormal phenomenon to normal power sources to make loads keep obtaining supplied power and providing power calculation and load management to make a plurality of power sources in parallel connection to get larger power output, comprising:

a plurality of power input sides used to receive a plurality of external independent power sources;

a plurality of first voltage and current detecting modules used to detect whether said power sources of said power input sides is abnormal;

a plurality of power output sides used to supply a plurality of loads with required power;

a plurality of second voltage and current detecting modules used to detect whether power of said power output sides is abnormal;

a plurality of power source switching modules used to switch a power source supplying said power output sides with power due to a signal of a control module; and

said control module controlling a plurality of control switches to be in an ON or OFF state and controlling said power source switching modules according to a state informed from said first voltage and current detecting modules and said second voltage and current detecting module and can output a harmonic signal to said power input sides.

2. The multiple power sources control system as recited in claim 1, wherein at least two said power input sides receive the plurality of said external independent power sources.

3. The multiple power sources control system as recited in claim 1, wherein at least one said power output side supplies at least one of said loads with power.

4. The multiple power sources control system as recited in claim 1, wherein at least one first voltage and current detecting module detects at least two of said power input sides.

5. The multiple power sources control system as recited in claim 1, wherein at least one second voltage and current system detects at least one of said power output sides.

6. The multiple power sources control system as recited in claim 1, wherein said power source switching modules switches at least two of said plurality of independent power sources.

7. The multiple power sources control system as recited in claim 1, wherein at least one of said power source switching modules are provided.

8. The multiple power sources control system as recited in claim 1 further comprising:

a MOSFET transistor to control whether power is transmitted to at least one of the plurality of loads;

a bridge rectifier to rectify power to provide said MOSFET transistor with an electric current;

a bias circuit to provide said MOSFET transistor a fixed bias; and

a coupler to control a state of said MOSFET transistor by an external control signal passing through said coupler.

9. The multiple power sources control system as recited in claim 8, wherein said MOSFET transistor is replaced by other transistor components.

10. The multiple power sources control module system as recited in claim 8, wherein said coupler is replaced by other transistor components.

11. The multiple power sources control system as recited in claim 8, wherein said bias circuit comprises:

a first transistor D1 used to rectify power;

a first resistance R1;

a first capacitance C1 proceeding first-stage voltage decay and filtering wave of power rectified by said first transistor D1 in coordination with said first resistance R1;

a second resistance R2;

a second capacitance C2 proceeding second-stage voltage decay and filtering wave of power processed by said first resistance R1 and said first capacitance C1 in coordination of said second resistance R2;

a third resistance R3; and

a Zener transistor D2 processing power processed by said second resistance R2 and said second capacitance C2 in coordination with said third resistance R3.

12. The multiple power sources control system as recited in claim 11, wherein a third transistor D3 is added into said bias circuit to work in coordination with said first transistor D1.

13. A second power source control module, comprising:

a first MOSFET transistor;

a second MOSFET transistor;

a first diode;

a second diode;

a bias circuit providing said first MOSFET transistor and said second MOSFET transistor with a fixed bias; and

a coupler controlling states of said first MOSFET transistor, said second MOSFET transistor, said first diode, and said second diode by an external control signal passing through said coupler.

14. The second power source control module as recited in claim 13, wherein said MOSFET transistor is replaced with IGBT or other power components which can be turned on or off immediately.

15. The second power source control module as recited in claim 13, wherein said coupler is replaced with other transistor components.

16. The second power source control module as recited in claim 13, wherein said bias circuit is replaced with other transistor components.

17. The second power source control module as recited in claim 13, wherein said bias circuit comprises:

a first transistor D1 used to rectify power;

a first resistance R1;

a first capacitance C1 used to proceed first-stage voltage decay and filtering wave of power rectified by and said first transistor D1 in coordination with said first resistance R1;

a second resistance R2;

a second capacitance C2 used to proceed second-stage voltage decay and filtering wave of power processed by said first resistance R1 and said first capacitance C1 in coordination with said second resistance R2;

a third resistance R3; and

a Zener diode D2 used to process power processed by said second resistance R2 and said second capacitance C2 in coordination with said third resistance R3.

18. The second power source control module as recited in claim 17, wherein a second diode D2 is added into said bias circuit to work in coordination with said Zener diode D1 to rectify.