CONTROL POWER SUPPLY DEVICE FOR INVERTER

• US 20160359428A1
• Filed: 05/31/2016
• Published: 12/08/2016
• Est. Priority Date: 06/02/2015
• Status: Active Grant

• Current Assignee: LSIS Co. Ltd. (LS Corporation)
• Original Assignee: LSIS Co. Ltd. (LS Corporation)
• Inventors: BAE, Tae-Suk, YANG, Chun-Suk
• Granted Patent: US 9,876,441 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02J 9/02 in which an auxiliary distribution system and its associated lamps are brought into service
• CPC Class Codes: H02J 9/06 with automatic change-over , e.g. UPS systems
• CPC Class Codes: H02M 1/0006 Arrangements for supplying an adequate voltage to the control circuit of converters
• CPC Class Codes: H02M 1/08 Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• CPC Class Codes: H02M 1/325 with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
• CPC Class Codes: H02M 7/48 using discharge tubes with control electrode or semiconductor devices with control electrode
• CPC Class Codes: H02M 7/537 using semiconductor devices only, e.g. single switched pulse inverters

Abstract

In some embodiments, a control power supply device for an inverter may include a main switched-mode power supply (SMPS) for supplying rated voltages to a controller and an auxiliary circuit of the inverter, an auxiliary SMPS configured to be operated when the main SMPS is interrupted to supply the rated voltages to the controller and the auxiliary circuit of the inverter; and an SMPS controller configured to sense an output voltage from the main SMPS, determine whether the sensed voltage is within a normal range and interrupt the main SMPS and operate the auxiliary SMPS if not, and transmit trip information to the controller.

Claims

1. A control power supply device for an inverter, which supplies stable power to the inverter, the control power supply device comprising:

a main switched-mode power supply (SMPS) configured to supply rated voltages to a controller and an auxiliary circuit of an inverter;

an auxiliary SMPS configured to be operated when the main SMPS is interrupted to supply the rated voltages to the controller and the auxiliary circuit of the inverter; and

an SMPS controller configured to;

sense an output voltage from the main SMPS,

determine whether the sensed voltage is within a normal range and interrupt the main SMPS and operate the auxiliary SMPS if not, and

transmit trip information to the controller.

2. The control power supply device according to claim 1, wherein the SMPS controller is configured to store a main SMPS fault history in a memory when the sensed voltage is not within the normal range.

3. The control power supply device according to claim 2, wherein the SMPS controller, upon being powered, is configured to:

determine whether there is the main SMPS fault history stored in the memory,

interrupt the main SMPS and operates the auxiliary SMPS if so, and

transmit the trip information to the controller.

4. The control power supply device according to claim 1, wherein the SMPS controller is further configured to sense the output voltage from the main SMPS when a DC-link voltage of the inverter is greater than a set voltage at the time of turning on or off the inverter, and determine whether the sensed voltage is in the normal range.

5. The control power supply device according to claim 4, wherein the set voltage level is an operating voltage of the main SMPS plus a margin voltage.

6. The control power supply device according to claim 1, further comprising a down converter configured to step down a voltage from a DC-link of the inverter and to output it to the SMPS controller.

7. The control power supply device according to claim 1, wherein the main SMPS and the auxiliary SMPS are configured to receive an operating voltage from the DC-link of the inverter.

8. The control power supply device according to claim 1, wherein the controller is configured to indicate the trip information received from the SMPS controller to a user.

9. The control power supply device according to claim 1, wherein a first mode is performed in which the SMPS controller transmits the trip information to the controller and the auxiliary SMPS supplies a voltage only to the controller.

10. The control power supply device according to claim 10, wherein a second mode is performed in which the SMPS controller transmits the trip information to the controller and the auxiliary SMPS supplies the controller and the auxiliary circuit with a minimum power including a gate drive power for restarting the inverter and an I/O power.

11. The control power supply device according to claim 11, wherein a third mode is performed in which the SMPS controller transmits the trip information to the controller and the auxiliary SMPS supplies the controller and the auxiliary circuit with a maximum voltage including a gate drive power for restarting the inverter and an I/O power, and power for communications and fan control.