TWI568162B - Power supply module, power supply device, and power controlling method - Google Patents

Description

Power control module, power supply and power control method

The present invention relates to a power module, and more particularly to a power control module that is applied to a power supply and that can provide corresponding power to a microprocessor located in the power supply device according to an operating state of the power supply. The power supply of the foregoing power module, and the power control method.

Generally speaking, electronic products require proper power to operate normally, and most electronic products are only driven by DC power. A power converter for converting mains AC power into DC power is installed between the electronic products and the input power source. . The power converter can detect the state of the electronic product and adjust the output to the electronic product to achieve energy saving.

More specifically, the electronic product can be operated in a low-energy state (such as standby mode) or a high-energy state (non-standby mode), and when the electronic product is in a low-energy state, the power converter reduces the output to the electronic device. Product power. However, the power converter itself is difficult to change its demand power depending on the operating state of the electronic product.

The invention provides a power control module electrically connected to a power conversion module. The power conversion module comprises a primary winding and a microcontroller, and the power control module comprises a plurality of power control units, a plurality of second switches and a microprocessor. Each power control unit includes an auxiliary winding connected in series and a first switch, each auxiliary winding being coupled to the primary winding. Each second switch is connected to one of the power control modules. The microprocessor is electrically connected to the first switch and the second switch, the microprocessor turns on the at least one first switch and one of the second switches, and the second switch that is turned on is connected in series with the first switch that is turned on, and The output power conversion module requires power when operating.

Another power supply of the present invention includes a power conversion module and a power control module. The power conversion module includes a primary winding and a plurality of microcontrollers. The power control module includes a plurality of power control units, a plurality of second switches, and a microprocessor, each power control unit including an auxiliary coil and a first switch, each auxiliary winding being coupled to the primary winding. Each of the second switches is connected to one of the power control units; the microprocessor is coupled to the first switch and the second switch, and the at least one first switch and one of the second switches are turned on, and the second open relationship of the conduction is At least one of the first switches that are turned on is connected in series.

The present invention further provides a power control method that provides one of required power when the power supply device is operated; the power supply device includes a primary winding. The power control method includes the following steps. Providing a plurality of auxiliary windings, a plurality of first switches, and a plurality of second switches, the auxiliary windings being coupled to the primary windings, each of the first switches being connected in series with one of the auxiliary windings to form a power control unit, each second switch being coupled thereto One of the power control units. Detecting the power demand of the power supply device; and the power according to the power supply device The demand turns on at least one first switch and one of the second switches, and the second open relationship of the conduction is connected in series with the at least one first switch that is turned on.

10‧‧‧Power Conversion Module

100‧‧‧Primary side rectifier

11‧‧‧Microcontroller

110‧‧‧Power factor corrector

120‧‧‧primary side filter

130‧‧‧Power Conversion Unit

132‧‧‧Power Converter

140‧‧‧Secondary side rectifier

150‧‧‧Secondary side filter

20‧‧‧Power Control Module

200‧‧‧Microprocessor

210_1~210_n‧‧‧Power Control Unit

OUT_1~OUT_n‧‧‧output

RL‧‧ load

SW1_1~SW1_n‧‧‧ first switch

SW2_1~SW2_n‧‧‧Second switch

Wp‧‧‧ primary winding

Ws‧‧‧second winding

Wa_1~Wa_n‧‧‧Auxiliary winding

1 is a circuit block diagram of a power supply device in accordance with the present invention; FIG. 2 is a circuit diagram of a power control module in accordance with the present invention; and FIG. 3 is an output voltage-time diagram in accordance with the present invention.

Please refer to FIG. 1 , which is a circuit block diagram and a power diagram of a power supply device according to the present invention. A power supply (not otherwise labeled) is used to provide the power required to operate the load RL connected to its output stage. The power supply device includes a power conversion module 10 and a power control module 20. The power conversion module 10 is disposed between the input power source Vin and the load RL, and is configured to convert the input power source Vin into the power applied by the load RL, and the load RL may be Server or PC. The power control module 20 is electrically connected to the power conversion module 10 for providing power required for operation of each of the microcontrollers 11 (described later) in the power conversion module 10.

The power conversion module 10 includes a coupled primary winding Wp and a secondary winding Ws. By adjusting the turns ratio of the primary winding Wp and the secondary winding Ws, the power level and power form of the input power source Vin can be changed ( For example, converting alternating current to direct current) to provide power suitable for the load RL.

The power conversion module 10 includes a primary side rectifier 100 (for example, a bridge rectifier) connected between the input power source Vin and the primary winding Wp, a power factor corrector 110, a primary side filter 120, a power converter 130, and a secondary side. The rectifier 140 and the secondary side filter 150. The primary side rectifier 100 is electrically connected to the input power source Vin, and the input power source Vin can be a commercial power source. AC power. The power factor corrector 110 is electrically connected to the primary side rectifier 100. The primary side filter 120 is disposed between the power factor corrector 110 and the primary winding Wp of the power converter 130, and is electrically connected to the power factor corrector 110 and the power converter. 130. The secondary side filter 140 is electrically connected to the secondary winding Ws, and the secondary side filter 150 is electrically connected to the secondary side rectifier 140. After the AC power supplied from the input power source Vin is rectified by the primary side rectifier 100, the power factor is adjusted by the power factor corrector 110 and the primary side filter 120, and after filtering the necessary noise, it is coupled to the secondary winding Ws via the primary winding Wp. The secondary side rectifier 140 and the secondary side filter 150 cooperate to synchronously rectify and filter the power coupled to the secondary winding Ws to be converted into DC power for use by the load RL.

The power conversion module 10 further includes a plurality of microcontrollers 11, which may be located, for example, in the power factor corrector 110, the power converter 130, and the secondary side rectifier 140, and are used to sequentially load the RL demand power. The operational states of the power switches or active components in the power factor corrector 110, the power converter 130, and the secondary side synchronous rectifier 140 are controlled. For example, when the load RL is operating in a high energy state, the microcontroller 11 provided in the power factor corrector 110 can, for example, drive the power factor corrector 110 to perform a power factor correction function to provide power with high power factor. Load RL. On the other hand, when the load RL is operated in a low-energy state, the power conversion module 10 only needs to provide power for detecting whether the user re-enters the load RL into a high-energy state, so that the operation of the power factor corrector can be suspended to save energy. effect.

The power control module 20 is electrically connected to each of the microcontrollers 11 of the power conversion module 10, and adjusts the output power according to the operating state (off or startup) of each of the microcontrollers 11.

Referring to FIG. 2, a circuit diagram of a power control module in accordance with the present invention is shown. The power control module 20 includes a microprocessor 200, a plurality of auxiliary windings Wa_1~Wa_n, a plurality of first switches SW1_1~SW1_n, and a plurality of second switches SW2_1~SW2_n. The microprocessor 200 is electrically connected to each of the first switches SW1_1 SW SW1_n and each of the second switches SW2_1 SW SW2_n, and causes the first switches SW1_1~SW1_n and the first switch according to the operating states of the microcontrollers 11 in the power conversion module 10. The two switches SW2_1~SW2_n switch between on and off.

The auxiliary windings Wa_1~Wa_n may be designed to have the same turns ratio or different turns ratios depending on the required power of the microcontroller 11.

Each of the first switches SW1_1~SW1_n is connected in series with one of the auxiliary windings Wa_1~Wa_n to form power control units 210_1~210_n. Each of the first switches SW1_1 SW SW1_n is electrically connected to the microprocessor 200 and is controlled by the microprocessor 200 to switch between on and off. The first switches SW1_1~SW1_n can be implemented, for example, with a metal oxide field effect transistor.

Each of the second switches SW2_1~SW2_n is disposed between one of the power control units 210_1~210_n and one of the output terminals OUT_1~OUT_n thereof, and is switched between on and off by the control of the microprocessor 200. Each of the second switches SW2_1~SW2_n can be implemented, for example, with a metal oxide field effect transistor.

In actual operation, the microprocessor 200 detects the operating state of each microprocessor 11 in the power conversion module 10, and turns on at least one of the first switches SW1_1~SW1_n and one of the second switches SW2_1~SW2_n to output Corresponding to the different voltage standards when the microprocessor 11 is operated Bit power (output voltage as shown in Figure 3). The operation of the power control module 20 of the present invention in different operating states will be described below.

Referring to FIG. 2 and FIG. 3 simultaneously, in the first operating state (time t1 to t2 shown in FIG. 3), the power control module 20 can generate the first output voltage Vcc_1. In this state, the microprocessor 200 turns on the first switch SW1_1 and the second switch SW2_1, so that the auxiliary winding Wa_1 is coupled to the primary winding Wp and generates a first output voltage Vcc_1, and the first output voltage Vcc_1 is output. The terminal OUT_1 is delivered to the microprocessor 11 of the power conversion module 10.

When the voltage of the primary winding Wp is Vp, the number of turns of the primary winding Wp is _Np , and the number of turns of the auxiliary winding Wa_1 is _{Nwa_1} , the first output voltage Vcc_1 can be expressed by the following equation:

In the second operating state (time t2~t3 as shown in FIG. 3), the power control module 20 is operable to generate the second output voltage Vcc_2. In this state, the microprocessor 200 turns on the first switches SW1_1, SW1_2 and the second switch SW2_2, so that the auxiliary windings Wa_1, Wa_2 are coupled to the primary winding Wp and generate a second output voltage Vcc_2. In the second state, the number of turns of the auxiliary windings Wa_1, Wa_2 that cooperate with the second output voltage Vcc_2 is greater than the number of turns of the auxiliary winding Wa_1 that provides the first output voltage Vcc_1 in the first operating state, so the second output voltage Vcc_2 It will be higher than the first output voltage Vcc_1.

When the second output voltage can be expressed by the following formula Vcc_2 voltage Vp of the primary winding Wp is, the number of turns of the primary winding Wp is N _p, the number of turns of the auxiliary winding Wa_1 _{Wa_1} N, the number of turns of the auxiliary winding Wa_2 N _{Wa_2:}

In the third state (time t3 as shown in FIG. 3), the power control module 20 is operable to generate a third output voltage Vcc_3. In this state, the microprocessor 200 turns on the first switches SW1_1, SW1_2, SW1_3 and the second switch SW2_3, and the auxiliary windings Wa_1, Wa_2, Wa_3 are coupled to the primary winding Wp to induce and generate a third output voltage Vcc_3, the third output voltage. Vcc_3 is higher than the second output voltage Vcc_2.

When the voltage of the primary winding Wp is Vp, Wp is the number of turns of the primary winding N _p, the number of turns of the auxiliary winding is Wa_1 N _{Wa_1,} the secondary winding turns Wa_2 is N _{Wa_2,} the number of turns of the auxiliary winding Wa_3 N _{Wa_3,} first The two output voltages Vcc_3 can be expressed as follows:

In the fourth state, the power control module 20 is operable to generate an output voltage Vcc_n. In this state, the microprocessor 200 turns on all of the first switches SW1_1~SW1_n and the second switch SW2_n, and the auxiliary windings Wa_1~Wa_n are coupled to the primary winding Wp to induce an output voltage Vcc_n.

When the voltage of the primary winding Wp is Vp, Wp is the number of turns of the primary winding N _p, the number of turns of the auxiliary winding is Wa_1 N _{Wa_1,} the secondary winding turns Wa_2 is N _{Wa_2,} the number of turns of the auxiliary winding Wa_3 N _{Wa_3,} auxiliary When the number of turns of the winding Wa_n is N _{Wa_n} , the output voltage Vcc_n can be expressed by:

It can be known from the foregoing first to fourth operating states that the higher the power demand of the power conversion module 10 is, the higher the output voltage of the power control module 20 is, and the microprocessor 200 turns on the first switches SW1_1~SW1_n. The number is increased to increase the auxiliary windings Wa_1~Wa_n connected in series. Next, the microprocessor 100 will connect to the aforementioned serial connection. The second switches SW2_1~SW2_n of the auxiliary windings Wa_1~Wa_n enable the power generated by coupling the auxiliary windings Wa_1~Wa_n connected in series with the primary winding Wp to be transmitted to the power conversion module 10 through the output terminals OUT_1~OUT_n for starting. The microprocessor 11 is used.

In short, the power output by the power control module 20 may be Vcc_1~Vcc_n depending on the voltage level. When the number of turns of the primary winding Wp is Np, the voltage formed in the primary winding Wp is Vp, and the auxiliary winding Wa_1~ The number of turns of _{Wa_n} is N _{Wa_1} ~N _{Wa_n} , and when the switching signals sent by the microprocessor 200 to the second switches SW2_1~SW2~n2 are respectively A1~An, the following conditions are satisfied:

The switching signal sent by the microprocessor 200 to the second switches SW2_1~SW2_n may be a high level signal or a low level signal. When the microprocessor 200 sends a switching signal high level signal to one of the second switches SW2_1~SW2_n, A1~An is 1; when the microprocessor 200 sends a switching signal to one of the second switches SW2_1~SW2_n When the low level signal is low, A1~An is 0. For example, when the microprocessor 200 turns on the second switch SW2_1, A1 is 1, A2~An is 0, then Vcc_1=NWa_1; when the microprocessor 200 turns on the second switch SW2_2, A2 is 1, A1 A3~An is 0.

In summary, the power control module 20 of the present invention turns on at least one of the first switches SW1_1 SW SW1_n and one of the second switches SW2_1 SW SW2_n to supply the requirements of the microprocessor 11 when the power conversion module 10 is operated. electric power. Among them, the second opening of the conduction The switches SW2_1~SW2_n connect the auxiliary windings Wa_1~Wa_n connected to all of the first switches SW1_1~SW1_n that are turned on in series. Furthermore, the number of conductions of the first switches SW1_1~SW1_n is proportional to the power output by the power control module 20; that is, the more the first switches SW1_1~SW1_n are turned on, the power output by the power control module 20. The larger the voltage is, the smaller the power output by the power control module 20 is.

The power control method for the present invention is applied to one of the required powers when the power supply device is operated. The power supply device includes a primary winding Wp, and the power control method includes the following steps.

First, a plurality of auxiliary windings Wa_1~Wa_n, a plurality of first switches SW1_1~SW1_n and a plurality of second switches SW2_1~SW2_n are provided; the auxiliary windings Wa_1~Wa_n are coupled with the primary winding Wp, and each of the first switches SW1_1~SW1_n and one of the first switches SW1_1~SW1_n The auxiliary windings Wa_1~Wa_n are connected in series to form a power control unit 210_1~210_n, and each of the second switches SW2_1~SW2_n is connected to one of the power control units 210_1~210_n. Then, the power control module 20 detects the operating state of each of the microcontrollers 11 in the power supply device, and causes at least one of the first switches SW1_1~SW1_n and one of the second switches SW2_1~ according to the operating state of the microcontroller 11. SW2_n is turned on to provide the required power when the microprocessor 11 is operating. When the second switches SW2_1~SW2_n are turned on, the auxiliary windings Wa_1~Wa_n connected to the turned-on first switches SW1_1~SW1_n are connected in series and coupled with the primary winding Wp to generate corresponding to the operation of the microprocessor 11. Demand for electricity.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and various modifications may be made without departing from the spirit and scope of the invention. The scope of protection of the present invention is defined by the scope of the appended claims.

20‧‧‧Power Control Module

200‧‧‧Microcontroller

210_1~210_n‧‧‧Power Control Unit

OUT_1~OUT_n‧‧‧output

S1_1~S1_n‧‧‧first signal control terminal

SW1_1~SW1_n‧‧‧ first switch

SW2_1~SW2_n‧‧‧Second switch

Wa_1~Wa_n‧‧‧Auxiliary winding

Claims (10)

A power control module is coupled to a primary winding of a power conversion module, the power control module includes: a plurality of power control units, each of the power control units including an auxiliary winding and a first switch connected in series, each of the An auxiliary winding is coupled to the primary winding; a plurality of second switches, each of the second switches being coupled to one of the power control units; and a microprocessor electrically coupled to the first switches and the second switches, The microprocessor turns on the at least one first switch and one of the second switches, and the second open relationship of the conduction is connected in series with the at least one first switch that is turned on, and outputs the power conversion module when operating. Demand electricity. The power control module of claim 1, wherein the microprocessor turns on the first switches, and the second open relationship of the conduction is connected in series with the first switches that are turned on. The power control module of claim 1, wherein the voltage supplied by the power control unit to the power conversion module is proportional to the amount of conduction of the first switches. The power control module of claim 1, wherein when the number of turns of the primary winding is Np, the voltage formed in the primary winding is Vp, and the number of turns of the auxiliary windings is N _{Wa_1} ~N _{Wa_n} , respectively. The switching states of the second switches SW1_1~SW2~n are A1~An, and the output power of the power control module is Vcc_1~Vcc_n, respectively, and the following conditions are met: A power supply comprising: a power conversion module comprising a primary winding and a plurality of microcontrollers; A power control module includes: a plurality of power control units, each of the power control units includes an auxiliary coil and a first switch, each of the auxiliary windings being coupled to the primary winding; and a plurality of second switches, each of the second switches being coupled to One of the power control units; and a microprocessor coupled to the first switches and the second switches, wherein the microprocessor turns on at least one of the first switches and one of the second switches The second open relationship is connected in series with the at least one first switch that is turned on. The power supply of claim 5, wherein the microprocessor turns on the first switches, and the second open relationship of the conduction is in series connection with the first switches that are turned on. The power supply of claim 5, wherein the voltage supplied by the power control unit to the power conversion module is proportional to the amount of conduction of the first switches. The power supply device of claim 5, wherein when the number of turns of the primary winding is Np, the voltage formed in the primary winding is Vp, and the number of turns of the auxiliary windings is N _{Wa_1} ~N _{Wa_n} , respectively When the second switch is SW2_1~SW2~n, the switching state is A1~An, and the output power of the power control module is Vcc_1~Vcc_n, respectively, and the following conditions are met: The power supply device of claim 5, wherein the power conversion module further comprises: a primary side rectifier; and a power factor corrector electrically connected between the primary side rectifier and the primary winding, and includes The microprocessor; a secondary winding coupled to the primary winding; and a primary side rectifier electrically coupled to the secondary winding and including the microprocessor. A power control method for providing one of required power when a power supply device is operated, the power supply device comprising a primary winding, the power control method comprising: providing a plurality of auxiliary windings, a plurality of first switches, and a plurality of second switches, An auxiliary winding is coupled to the primary winding, each of the first switches is connected in series with one of the auxiliary windings to form a power control unit, and each of the second switches is connected to one of the power control units; detecting the power supply device And the second switch in the at least one first switch, wherein the second open relationship is connected in series with the at least one first switch that is turned on.