High frequency emergency power system

An emergency power system, high-frequency technology, applied in emergency power arrangements, control/regulation systems, collectors, etc., can solve the problems of high structural design and installation and production requirements, large power frequency transformers, inconvenient installation and transportation, etc., to achieve The effect of reducing hardware investment, high power density, convenient installation, use and maintenance

Inactive Publication Date: 2007-07-25
秦江超
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Power frequency transformers are large in size, high in cost, high in power consumption, and have high requirements for structural desi...

Method used

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Examples

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example 1

[0051] In Fig. 9, the main part of the present invention is shown in the dashed frame.

[0052] The switching element S of the emergency power supply system connected between the load and the AC power supply can be fully controlled switching devices such as IGBT (Insulated-gate Bipolar Transistor), MOSFET (Metal Oxide Semiconductor FieldEffect Transistor). Take the output 220V / 50Hz, 1KVA, battery 36V as an example, the component model: S11, using two IRF3710 (MOSFET) in parallel, S12, using two IRF3710 in parallel; D11-D14, using RHRP8120 (power diode); S21, S22 Adopt IGBT HGTG11N120 series. The output switch 6 uses a relay (high-power output needs to add a static transfer switch STS); C11, C12 electrolytic capacitors 470uF. The controller is a microcontroller MCU, FREESCALE MR series, the controller has a high-performance core CPU, output pulse modulation PWM. Peripheral circuits include sampling (current sensor, voltage sensor, etc.), signal modulation, output drive and other ci...

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Abstract

Belonging to high frequency inversion technical area of electric grid, the disclosed DC-DC convertor connected between electric supply and load provides high frequency emergency power source with no transformer in line frequency, and using battery in low voltage. Technical characters are: adding a stage of DC-DC convertor between battery and inversion part; controller uses one or more combinations from MCU/DSP/FPGA to constitute digital circuit; real time detecting multiplexing signals of voltage or current, including communication and control panel interfaces. The invention improves stability and precision of AC output power supply. Advantages are: high system efficiency, high power density, good control precision, easy of use and maintenance. Moreover, using high frequency PWM technique and dedicated software, the invention reduces investment on hardware.

Description

Technical field [0001] The invention discloses a DC-DC converter connected between a commercial power supply and a load, and belongs to the technical field of high-frequency inversion of power grids. Background technique [0002] At present, the emergency power supply (EPS) is a power supply device that can provide emergency power supply to the load when the power grid is cut off. There are many types of emergency power sources in the prior art, which can be summarized in the following two categories. The first type is a high frequency emergency power supply without a power frequency inverter transformer, that is, without a transformer, the battery is directly connected to the inverter part, as shown in Figure 1. Advantages The system is small in size (excluding batteries), low in loss, light in weight, and high in power density. Disadvantages require high-voltage batteries, and the battery voltage must be greater than or equal to the peak value of the inverter voltage (such as t...

Claims

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Application Information

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IPC IPC(8): H02J7/00H02J7/02H02J9/06H02M3/28H02M3/337H02M7/48
Inventor 秦江超
Owner 秦江超
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