Vehicle-mounted inverter circuit

A vehicle-mounted inverter and inverter circuit technology, applied in emergency protection circuit devices, instruments, electrical components, etc., can solve the problem of inability to automatically switch external AC220v alternating current.

Pending Publication Date: 2018-03-30
DEFA TECH WUXI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing vehicle inverter can only invert the DC power of the vehicle batte

Method used

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0034] Such as figure 1 As shown, the present invention provides a vehicle inverter circuit, including:

[0035] Boost conversion circuit 1, intermediate filter circuit 2, inverter circuit 3, microcontroller MCU, output filter circuit 4, AC voltage input detection circuit 5, AC voltage effective value detection circuit 6, switcher K1, voltage feedback circuit 7, A battery voltage monitoring circuit 8, an internal voltage supply circuit 9, and at least one current sensor CT;

[0036] The input terminal of the boost conversion circuit 1 is used to connect the battery voltage Vbat, and the output voltage is higher than the bus voltage Vbus of Vbat under the control of the microprocessor MCU;

[0037] After the bus voltage Vbus is filtered by the intermediate filter circuit 2, it is input to the inverter circuit 3, and the inverter circuit 3 is used to generate t...

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Abstract

The invention provides a vehicle-mounted inverter circuit, including: a boost conversion circuit, an intermediate filter circuit, an inverter circuit, a microcontroller MCU, an output filter circuit, an AC voltage input detection circuit, an AC voltage effective value detection circuit, and a switcher K1, voltage feedback circuit, battery voltage monitoring circuit, internal voltage supply circuit, and at least one current sensor CT; the input terminal of the boost conversion circuit is used to connect the battery voltage Vbat, and the output voltage is higher than Vbat under the control of the microprocessor MCU The bus voltage Vbus; after the bus voltage Vbus is filtered by the intermediate filter circuit, it is input to the inverter circuit, and the inverter circuit is used to generate the AC voltage for output; the inverter circuit is connected to the AC output terminal of the inverter through the output filter circuit; the voltage feedback circuit is respectively The feedback voltage signal is generated and output to the microcontroller MCU and the boost conversion circuit; the invention can automatically switch the external AC voltage.

Description

technical field [0001] The invention relates to a vehicle inverter, in particular to a vehicle inverter circuit. Background technique [0002] The car inverter (power converter, Power Inverter) can convert DC12V direct current into AC220V alternating current, which is the same as the mains power, and is used by general electrical appliances. It is a convenient car power converter. [0003] There are many circuit structures of vehicle inverters, how to design a stable circuit is one of the issues that designers need to consider; [0004] The existing on-board inverter can only invert the direct current of the on-board battery into AC 220v alternating current, and cannot automatically switch the external AC 220v alternating current. Contents of the invention [0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a vehicle-mounted inverter circuit. Using the electric energy in the vehicle battery can facilitate the user to...

Claims

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Application Information

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IPC IPC(8): H02M7/5387H02M1/092H02M3/335H02M1/14H02H7/122
CPCH02H7/122H02M1/092H02M1/14H02M3/33569H02M7/53871
Inventor 苏成锋胡小敏马珍峰潘卫星
Owner DEFA TECH WUXI
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