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Thyristor control circuit, system and method

A technology of control system and control circuit, applied in control/regulating system, regulating electrical variables, instruments, etc., can solve the problem of low reliability, improve reliability, reduce the probability of inrush current overcurrent, and improve the conduction time point Effect

Active Publication Date: 2022-04-05
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to provide a thyristor control circuit, system and method to solve the problem of low reliability of the existing on-board charger when using the thyristor to control the inrush current

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  • Thyristor control circuit, system and method
  • Thyristor control circuit, system and method
  • Thyristor control circuit, system and method

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Embodiment Construction

[0048] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0049]The core idea of ​​the present invention is to solve the problem of low reliability of the current on-board charger when the surge current is controlled by the thyristor.

[0050] In order to realize this idea, the embodiment of the present invention provides a thyristor control circuit, please refer to figure 2 and image 3 , The thyristor control circuit 1 provided by the embodiment of the present invention includes: a voltage comparator 10 and a thyristor drive circuit 11 .

[0051] Wherein, the voltage comparator 10 is configured to compare the magnitude of the AC grid voltage and the reference voltage, and ...

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Abstract

The invention provides a thyristor control circuit, system and method. A voltage comparator is used to compare the reference voltage and the AC power grid voltage to obtain the control signal of the thyristor drive circuit, so as to control the conduction and operation of the thyristor. off. Compared with the existing technology, since the turn-on moment of the thyristor is no longer based on the predicted time, but based on the result of the conduction between the AC voltage value obtained by actual sampling and the reference voltage value, it can better control the controllable The silicon rectifier circuit conduction time point can absorb the energy of the power grid to the maximum extent, and effectively shorten the response time of the current impact. In addition, the method of using a circuit to drive the thyristor not only simplifies the complexity of the software, but also avoids the problem of excessive surge current caused by the sudden convex distortion of the AC grid voltage waveform during the falling phase, reducing the probability of surge current overcurrent , improving reliability.

Description

technical field [0001] The invention relates to the technical field of on-board chargers, in particular to a thyristor control circuit, system and method. Background technique [0002] The on-board charger plays an important role in transferring grid energy to the battery. Due to the large capacitance inside the charger, a large inrush current will be generated immediately after the charger is connected to the AC grid. In order to meet the requirements of regulations and protect its own devices, the AC input side of the charger needs to have a corresponding control switch to control the voltage difference between the AC grid voltage and the internal capacitor of the charger at the moment of conduction, so as to limit the amplitude of the inrush current. [0003] The SCR can be turned on when the forward voltage drop is positive and enabled. Based on this characteristic, thyristors are being more and more used in the rectifier circuit on the AC grid side of the charger, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/45
CPCG05F1/45
Inventor 刘通唐志俊闻伟
Owner UNITED AUTOMOTIVE ELECTRONICS SYST