Surge current preventing and time sequence controlling device and method for thermal connect-disceonnect electronic equipment

Abstract

The present invention provides one kind of surge current preventing and time sequence controlling device and method for plug-and-play electronic equipment. The device includes voltage controlled resistance unit connected serially to the power source input end of the electronic equipment; and controller with control end connected to the control end of the voltage controlled resistance unit to control the equivalent resistance, which is controlled to be relatively great while the electronic equipment is accessed to the power source and relatively small after preset time. The controller includes resistor and capacitor and controls the control voltage of the control end via controlling the charge and discharge of the capacitor. The method includes the following steps: determining the sequence of applying different power voltages to the electronic equipment; judging the plugging of electronic equipment; and lowering the limiting resistances serially connected to the input power sources in the sequence.

Description

technical field [0001] The invention relates to electronic equipment, in particular to an anti-surge current and timing control device and method for hot-swappable electronic equipment; the invention is particularly suitable for a device and method for suppressing surge current in a power-on circuit of a hot-swappable hard disk in a hard disk module of a computer server method. Background technique [0002] With the rapid development of computer technology, modern computer servers require high integration, stability, and strong data storage and management functions, so it has very strict requirements for each component. With the development of ULTRA SCSI For applications, server data storage mostly adopts hard disk modules, which not only can obtain large-capacity storage space, but also can easily adopt redundant storage methods to ensure the security of data storage. However, in the hard disk module, in order to ensure that the faulty hard disk is replaced while the syste...

AI Technical Summary

Problems solved by technology

figure 1 (a) is the circuit schematic diagram of connecting an inductor in series with the power supply. This method is obviously not acceptable for hot-swap hard disk modules, because although the inductor can eliminate the instantaneous surge current when plugged in at the side, when When the hard disk is pulled out, the inductor itself will generate a strong self-excitation due to the instantaneous elimination of the load, which will cause great interference to other parts of the circuit; figure 1 (b) is the schematic circuit diagram of a current-limiting resistor connected in series at the instant when the load is turned on. After the capacitive load is charged to a certain level, the current-limiting resistor is removed. The feasibility of this method for hard disk modules is Not high, because it requires a lot of materials, it is difficult to realize

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