阅读说明：本技术 一种电源热拔插模块 (power supply hot plug module ) 是由 肖波 李松磊 于 2019-07-31 设计创作，主要内容包括：本发明公开了一种电源热拔插模块,应用于交流输入端,该模块包括：所述模块包括电源热拔插电路、整流电路、三相插座和电容；所述电源热拔插电路通过整流电路与电容相连；所述插座包括接地端；所述电源热拔插电路包括交流输入插头、继电器、热敏电阻和控制单元；所述交流输入插头包括第一插针、第二插针和第三插针；所述第三插针用于与三相插座中的接地端接触；所述继电器包括继电器延时吸合电路和常开开关；所述热敏电阻与所述第一插针或第二插针串联连接；所述热敏电阻与继电器的常开开关并联。本发明还公开了一种电源热拔插模块,应用于直流输出端。本发明提供的模块减少了电源模块在热拔插时对电源模块内部及外部电网的影响。(The invention discloses a power supply hot plug module, which is applied to an alternating current input end and comprises: the module comprises a power supply hot plug circuit, a rectification circuit, a three-phase socket and a capacitor; the power supply hot plug circuit is connected with the capacitor through the rectifying circuit; the socket comprises a grounding terminal; the power supply hot plug circuit comprises an alternating current input plug, a relay, a thermistor and a control unit; the alternating current input plug comprises a first contact pin, a second contact pin and a third contact pin; the third contact pin is used for contacting with a grounding end in the three-phase socket; the relay comprises a relay time-delay pull-in circuit and a normally open switch; the thermistor is connected with the first contact pin or the second contact pin in series; the thermistor is connected with a normally open switch of the relay in parallel. The invention also discloses a power supply hot plug module which is applied to the direct current output end. The module provided by the invention reduces the influence of the power module on the internal and external power grids of the power module during hot plugging.)

1. the utility model provides a power hot plug module, is applied to AC input end, its characterized in that:

The module comprises a power supply hot plug circuit, a rectification circuit, a three-phase socket and a capacitor; the power supply hot plug circuit is connected with the capacitor through the rectifying circuit; the socket comprises a grounding terminal;

the power supply hot plug circuit comprises an alternating current input plug, a relay, a thermistor and a control unit; the alternating current input plug comprises a first contact pin, a second contact pin and a third contact pin; the third contact pin is used for contacting with a grounding end in the three-phase socket; the relay comprises a relay time-delay pull-in circuit and a normally open switch; the thermistor is connected with the first contact pin or the second contact pin in series; the thermistor is connected with a normally open switch of the relay in parallel;

The alternating current input plug is used for accessing alternating current when the alternating current input plug is plugged into the three-phase socket;

the thermistor is used for charging the capacitor by the alternating current through the thermistor;

The control unit is used for controlling the relay time-delay suction circuit to start after the alternating current is obtained;

And the normally open switch is closed after the relay time-delay suction circuit is started, so that the thermistor is short-circuited to finish the alternating current access process.

2. The module of claim 1, wherein:

the thermistor has a negative temperature coefficient.

3. the module of claim 1, wherein:

the lengths of the first contact pin and the second contact pin are the same; the length of the third contact pin is greater than that of the first contact pin or the second contact pin;

The socket further comprises an L end and an N end;

The alternating current input plug is used for accessing alternating current when the alternating current input plug is plugged into a socket, and comprises:

the alternating current input plug is used for enabling the third contact pin to be in contact with the grounding end of the socket firstly when the alternating current input plug is inserted into the socket, and then enabling the first contact pin and the second contact pin to be in contact with the L end and the N end of the socket respectively, so that alternating current is accessed.

4. the module of claim 3, wherein:

the length of the third pin is 3 mm longer than that of the first pin or the second pin.

5. the utility model provides a power hot plug module, is applied to direct current output, its characterized in that:

the module comprises a two-phase socket, a resistor, a capacitor bank and a busbar plug;

the two-phase socket comprises 4 contact pins; the first phase comprises a first pin and a second pin, and the second phase comprises a third pin and a fourth pin; the length of the first contact pin is equal to that of the fourth contact pin; the length of the second contact pin is equal to that of the third contact pin; the capacitor group comprises N capacitors which are connected in parallel, wherein N is an integer greater than 1; the first contact pin and the second contact pin are intersected at one end of the capacitor bank, and the third contact pin and the fourth contact pin are intersected at the other end of the capacitor bank;

one end of the resistor is connected with the first contact pin through a first capacitor in the capacitor bank, and the other end of the resistor is connected with the fourth contact pin; the capacitor bank is connected between the second contact pin and the third contact pin in an end mode, so that the capacitor bank is connected with the second contact pin and the third contact pin in series;

The length of the first contact pin is longer than that of the second contact pin, so that when the two-phase socket is inserted into the busbar plug, the first contact pin and the fourth contact pin are in contact with the busbar plug before the second contact pin and the third contact pin, and the capacitor bank is charged through the resistor.

6. The module of claim 5, wherein:

3RC<t，

Ic＝Vo/R，

P＝Vo*Vo/R，

wherein, R is the resistance value of the resistor, C is the sum of the capacitance values of the capacitor bank, t is the shortest plugging and unplugging time of the two-phase socket, P is the power of the resistor, Ic is the maximum current passing through the resistor, and Vo is 12V.

Technical Field

The invention relates to the field of server power supply, in particular to a power supply hot plug module in the field of server power supply.

Background

With the development of server technology, the power module, which is the most critical power supply unit of a server system, has higher and higher requirements for online maintainability, and uninterrupted power supply online hot plug, which is a key index, also becomes a necessary trend.

A large number of electrolytic capacitors are designed at an alternating current input end and a direct current output end in the switching power supply, and due to the fact that the external impedance of a characteristic port of each capacitor is extremely low, when a power supply module is plugged in and pulled out on line, an external power supply charges the capacitor in the power supply module at the moment of power-on, and at the moment, the current is very large, so that internal fuses and other electrical elements are easily damaged; the external power grid also causes instant voltage drop due to input of large current, so that the influence of the power module on the internal and external power grids of the power module is required to be reduced as much as possible when the power module is plugged in a hot plug mode.

Disclosure of Invention

the invention aims to provide a power supply hot plug module, which reduces the influence of the power supply module on an internal power grid and an external power grid during hot plug.

In order to solve the above technical problem, an embodiment of the present invention provides a power hot plug module, which is applied to an ac input terminal, and includes:

The module comprises a power supply hot plug circuit, a rectification circuit, a three-phase socket and a capacitor; the power supply hot plug circuit is connected with the capacitor through the rectifying circuit; the socket comprises a grounding terminal;

the power supply hot plug circuit comprises an alternating current input plug, a relay, a thermistor and a control unit; the alternating current input plug comprises a first contact pin, a second contact pin and a third contact pin; the third contact pin is used for contacting with a grounding end in the three-phase socket; the relay comprises a relay time-delay pull-in circuit and a normally open switch; the thermistor is connected with the first contact pin or the second contact pin in series; the thermistor is connected with a normally open switch of the relay in parallel;

The alternating current input plug is used for accessing alternating current when the alternating current input plug is plugged into the three-phase socket;

The thermistor is used for charging the capacitor by the alternating current through the thermistor;

the control unit is used for controlling the relay time-delay suction circuit to start after the alternating current is obtained;

and the normally open switch is closed after the relay time-delay suction circuit is started, so that the thermistor is short-circuited to finish the alternating current access process.

In an exemplary embodiment, the module further has the following features:

The thermistor has a negative temperature coefficient.

In an exemplary embodiment, the module further has the following features:

The lengths of the first contact pin and the second contact pin are the same; the length of the third contact pin is greater than that of the first contact pin or the second contact pin;

The socket further comprises an L end and an N end;

the alternating current input plug is used for accessing alternating current when the alternating current input plug is plugged into a socket, and comprises:

The alternating current input plug is used for enabling the third contact pin to be in contact with the grounding end of the socket firstly when the alternating current input plug is inserted into the socket, and then enabling the first contact pin and the second contact pin to be in contact with the L end and the N end of the socket respectively, so that alternating current is accessed.

In an exemplary embodiment, the module further has the following features:

The length of the third pin is 3 mm longer than that of the first pin or the second pin.

In order to solve the above problem, the present invention further provides a power supply hot plug module, which is applied to a dc output terminal, and includes:

The module comprises a two-phase socket, a resistor, a capacitor bank and a busbar plug;

the two-phase socket comprises 4 contact pins; the first phase comprises a first pin and a second pin, and the second phase comprises a third pin and a fourth pin; the length of the first contact pin is equal to that of the fourth contact pin; the length of the second contact pin is equal to that of the third contact pin; the capacitor group comprises N capacitors which are connected in parallel, wherein N is an integer greater than 1; the first contact pin and the second contact pin are intersected at one end of the capacitor bank, and the third contact pin and the fourth contact pin are intersected at the other end of the capacitor bank;

one end of the resistor is connected with the first contact pin through a first capacitor in the capacitor bank, and the other end of the resistor is connected with the fourth contact pin; the capacitor bank is connected between the second contact pin and the third contact pin in an end mode, so that the capacitor bank is connected with the second contact pin and the third contact pin in series;

The length of the first contact pin is longer than that of the second contact pin, so that when the two-phase socket is inserted into the busbar plug, the first contact pin and the fourth contact pin are in contact with the busbar plug before the second contact pin and the third contact pin, and the capacitor bank is charged through the resistor.

in an exemplary embodiment, the module further has the following features:

3RC<t，

Ic＝Vo/R，

P＝Vo*Vo/R，

wherein, R is the resistance value of the resistor, C is the sum of the capacitance values of the capacitor bank, t is the shortest plugging and unplugging time of the two-phase socket, P is the power of the resistor, Ic is the maximum current passing through the resistor, and Vo is 12V.

in summary, the power hot-plug module provided by the embodiment of the invention can reduce the influence of the power module on the internal and external power grids of the module as much as possible during hot-plug.

Drawings

fig. 1 is a schematic diagram of a power hot-plug module according to an embodiment of the invention.

Fig. 2 is a schematic diagram of a power hot-plug module according to an embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

Fig. 1 is a schematic diagram of a power hot plug module according to an embodiment of the present invention, where the power hot plug module shown in fig. 1 is applied to an ac input terminal, and the power hot plug module may include: the power supply hot plug circuit comprises a power supply hot plug circuit, a rectifying circuit, a three-phase socket and a capacitor.

the power hot plug circuit may include an ac input plug, a relay, a thermistor, and a control unit.

the alternating current input plug comprises a first contact pin, a second contact pin and a third contact pin; the third contact pin is used for contacting with a grounding end in the three-phase socket; and the alternating current input plug is used for accessing alternating current when the alternating current input plug is plugged into the three-phase socket.

the thermistor is connected with the first contact pin or the second contact pin in series; the thermistor is connected with a normally open switch of the relay in parallel; the thermistor is used for charging the capacitor by the alternating current through the thermistor.

The relay comprises a relay time-delay pull-in circuit and a normally open switch.

The control unit can be used for controlling the relay to delay the actuation circuit to start after the alternating current is obtained.

And the normally open switch is closed after the relay time-delay attraction circuit is started, so that the thermistor is short-circuited to finish the alternating current access process.

in an alternative embodiment, the thermistor has a negative temperature coefficient.

in an alternative embodiment, the first pin and the second pin are the same length; the length of the third contact pin is greater than that of the first contact pin or the second contact pin;

The socket further comprises an L end and an N end;

the alternating current input plug is used for accessing alternating current when the alternating current input plug is plugged into a socket, and comprises:

The alternating current input plug is used for enabling the third contact pin to be in contact with the grounding end of the socket firstly when the alternating current input plug is inserted into the socket, and then enabling the first contact pin and the second contact pin to be in contact with the L end and the N end of the socket respectively, so that alternating current is accessed.

In an alternative embodiment, the length of the third pin is 3 mm greater than the length of the first pin or the second pin.

in an alternative embodiment, the rectifier circuit is configured to rectify an alternating current to a direct current.

Fig. 2 is a schematic diagram of a power supply hot plug module according to an embodiment of the present invention, where the power supply hot plug module shown in fig. 2 is applied to a dc output terminal, and the power supply hot plug module may include: two-phase socket, resistance, electric capacity group and female row plug.

The two-phase socket may include a first phase and a second phase, the first phase may include a first pin and a second pin, and the second phase may include a third pin and a fourth pin. The length of the first contact pin can be equal to that of the fourth contact pin; the length of the second contact pin can be equal to that of the third contact pin; the capacitor group can comprise N capacitors which are connected in parallel, wherein N is an integer greater than 1;

One end of the resistor can be connected with the first contact pin through a first capacitor in the capacitor bank, and the other end of the resistor can be connected with the fourth contact pin; the capacitor bank can be connected between the second contact pin and the third contact pin in a terminating mode, so that the capacitor bank is connected with the second contact pin and the third contact pin in series;

The length of the first contact pin can be longer than that of the second contact pin, so that when the two-phase socket is inserted into the busbar plug, the first contact pin and the fourth contact pin are in contact with the busbar plug before the second contact pin and the third contact pin, and the first capacitor is charged through the resistor.

The busbar plug is provided with 4 pins corresponding to the two-phase socket, and the lengths of the 4 pins can be the same.

In an alternative embodiment, 3RC < t,

Ic＝Vo/R，

P＝Vo*Vo/R，

The resistance value of the resistor is R, the capacitance value of the first capacitor is C, the shortest plugging and unplugging time of the two-phase socket is t, P is the power of the resistor, Ic is the maximum current passing through the resistor, and Vo is 12 v.

example one

as shown in fig. 1, at the ac input side, the ac input plug has two short pins, one long pin, the long pin is a protection ground, and the short pins are L/N, respectively.

When the alternating current is just connected, the normally open switch of the relay is in a normally open state, the alternating current charges a capacitor behind a sorting bridge (namely the rectifying circuit) through the thermistor, the thermistor is negative in temperature coefficient, the resistance value is very large when the alternating current is just started, namely in a cold starting state, after an auxiliary power supply inside the power supply module is started, the relay is attracted, the thermistor is short-circuited, and the soft starting process is finished.

Example two

Most server systems include at least 2 power modules whose outputs are coupled together in parallel. When the power module is replaced, if the power module has no hot plug function, when the output end of the power module is connected to a 12V bus bar of the system, the bus bar voltage charges the capacitor in the power module, so that the drop of the system bus bar voltage is caused, and the work of a server system is interrupted when the system is serious; when the power module contacts with the busbar, the contact point is ignited due to the existence of large current, the output terminal is damaged, and a fire disaster is caused in severe cases.

in order to avoid the above situation, the present application proposes a power hot-plug module as shown in fig. 2. As shown in fig. 2, when the power module output terminal is not in contact with the system busbar, two long pins in the output contact pin are firstly in contact with +, -busbar, then the busbar voltage charges the module output filter capacitor C through the resistor R, after the output filter capacitor is charged, the output +, -terminal of the power module is in contact with the +, -busbar of the server system, the pre-charging resistor R is short-circuited, and at this time, because the voltage of the capacitor C is the same as the voltage of the system busbar, the drop of the system busbar voltage cannot be caused.

The selection of the dc side pre-charge resistor R is mainly considered in the actual design:

1. The time constant RC is determined according to the shortest time t of the module to be plugged and unplugged and the size of the output filter capacitor of the module. Calculated with a 3-fold time constant are:

3RC<t

wherein: r is a pre-charge resistor (R in the figure)

C is the sum of output filter capacitors

t is the shortest time for plugging and unplugging the module

2. power of the pre-charge resistor. The maximum current Ic through this resistor is:

Ic＝Vo/R

the instantaneous power is P Vo Vo/R, Vo is 12v, and then the resistor is selected according to the curve provided by the resistor manufacturer.

it will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing the relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a magnetic or optical disk, and the like. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, each module/unit in the above embodiments may be implemented in the form of hardware, and may also be implemented in the form of a software functional module. The present invention is not limited to any specific form of combination of hardware and software.

The foregoing is only a preferred embodiment of the present invention, and naturally there are many other embodiments of the present invention, and those skilled in the art can make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, and these corresponding changes and modifications should fall within the scope of the appended claims.