A detection method for the connection state of the remote voltage compensation terminal of the power supply
A technology of connection status and voltage compensation, which is applied in the field of power supply, can solve the problems of real-time detection of connection status and the inability to realize the real-time connection status of the remote voltage compensation terminal of the power supply, etc., and achieve the effect of simple and reliable judgment method, simple and cost-effective
Active Publication Date: 2022-04-15
SHENZHEN AEROSPACE NEW POWER TECH
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Problems solved by technology
[0004] However, the high-power DC power supply equipment with remote voltage compensation terminals in the prior art has no simple and effective measures to detect the connection status of the compensation terminals S+ and S- at the output end in real time, and disconnect the corresponding compensation connection while outputting power. The power supply will still have power output without shutdown protection, and the real-time connection status of the remote voltage compensation terminal of the power supply cannot be realized, resulting in test problems caused by the uncertainty of manual connection of cables at the test site
Method used
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Embodiment 1
[0040] In order to ensure the dynamic response performance of the high-power DC power supply, a fully differential proportional sampling circuit or a resistor divider network circuit is generally used to realize the voltage sampling at the output terminal of the power supply. This embodiment takes the fully differential output terminal voltage sampling circuit as an example. The circuit diagram is as follows: figure 1 (a) shown. The input signal of the differential sampling circuit is the load terminal voltage U after the power supply is loaded. out Two differential lines S+ and S-, the differential proportional resistance is R 1 and R 2 , the differential sampling output voltage is U sas_sa .
[0041] The hardware-in-the-loop detection method of the connection state of S+ and S- in this embodiment is as follows: figure 1 (b) shown. That is, the remote voltage sampling circuit at the output of the power supply includes an operational amplifier OPA, a resistor R1, a resist...
Embodiment 2
[0084] The following simulation experiments are carried out to verify the detection method in Example 1.
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The invention provides a method for detecting the connection state of the remote voltage compensation end of the power supply, which includes: adding a hardware detection resistor branch to the remote voltage sampling circuit at the output end of the power supply, and judging the output voltage of the remote voltage sampling circuit at the output end of the power supply The magnitude is compared with the theoretical expected value voltage, and the current connection status of the remote compensation terminals S+ and S‑ is detected in real time. By adopting the technical scheme of the invention, faults and errors can be reported in time, the safety of the test site can be maintained and reliable tests can be realized. Adding hardware circuits is simple and low cost, the judgment method is simple and reliable, and can be directly applied to actual projects; not only for power applications with output voltage differential sampling circuits, but also for any output voltage sampling circuits with compensation connection terminals in the power supply device.
Description
technical field [0001] The invention belongs to the technical field of power supplies, in particular to a method for detecting the connection state of a remote voltage compensation terminal of a power supply. Background technique [0002] Whether it is a DC power supply in an industrial application environment or a non-linear special DC power supply, the basic performance required is that the corresponding output has good voltage sampling accuracy under any working conditions, and its output accuracy is the key to evaluating high-power Key technical indicators of DC power supplies. Due to the fact that the high-power power supply has a long connection cable between the power supply and the power supply load in the actual test environment, the long connection cable will seriously affect the voltage accuracy of the power output under the condition of high-power output of the power supply, so compensation is generally used. The output voltage of the power supply is remotely co...
Claims
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IPC IPC(8): G01R31/50
Inventor 金珊珊张东来王超张斌王陶
Owner SHENZHEN AEROSPACE NEW POWER TECH