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Rotary transformer excitation system and short circuit protection circuit and method thereof

A short-circuit protection circuit and excitation system technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of high current flow and heat generation in the device, and achieve the effect of avoiding serious heat generation.

Active Publication Date: 2018-03-23
SUNGROW POWER SUPPLY CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The invention provides a resolver excitation system and its short-circuit protection circuit and method to solve the problem in the prior art that the device flows a large current and causes serious heating when the output of the system is short-circuited

Method used

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  • Rotary transformer excitation system and short circuit protection circuit and method thereof
  • Rotary transformer excitation system and short circuit protection circuit and method thereof
  • Rotary transformer excitation system and short circuit protection circuit and method thereof

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Embodiment Construction

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0053] The invention provides a short-circuit protection circuit of a resolver excitation system to solve the problem in the prior art that a device flows a large current and causes serious heating when the output of the system is short-circuited.

[0054] Specifically, for the short circuit protection circuit 101 of the resolver excitation system, see figure 1 and figure 2 , connected between the power supply and the ground, and connected with the excitation power amplifier circuit 102 a...

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Abstract

The invention provides a rotary transformer excitation system and a short circuit protection circuit and method thereof, and is used for detecting whether a short-circuit fault occurs in the rotary transformer excitation system or not. When a short-circuit fault occurs in the rotary transformer excitation system, an excitation power amplification circuit in the rotary transformer excitation systemis controlled to stop outputting excitation signals, and the output current of the system is pulled down to be close to zero, and the problem that the heating is serious due to heavy current flowingby the device is avoided. Meanwhile, a fault state feedback signal is output to a controller of the rotary transformer excitation system, so that the controller stops outputting the initial excitationsignals and enters a protection state.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a resolver excitation system and its short-circuit protection circuit and method. Background technique [0002] The resolver excitation system is a system that outputs a driving signal to drive the excitation winding of the resolver. In the prior art, when the output of the resolver excitation system is short-circuited to the power supply or ground, the protection scheme adopted is generally to limit the internal excitation power The maximum input and output current capability of the amplifying circuit limits its output current to a certain limit value. [0003] However, in the case of a short circuit in this scheme, the excitation power amplifier circuit will still output the maximum current at the limit value, and the device will still flow a large current for a long time, which will easily damage the device or reduce the life of the device. Contents of the inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/10
CPCH02H7/103
Inventor 杜恩利杨晗于安博
Owner SUNGROW POWER SUPPLY CO LTD
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