TWM512261U - Electronic system - Google Patents

Abstract

An electronic system is disclosed. The electronic system is electrically connected to an alternative current (AC) power source and includes a switch and a parallel power conversion device. The parallel power conversion device includes a first power conversion module, a second power conversion module, and a driving unit. The first power conversion module is electrically connected to the AC power source and the switch, the second power conversion module is electrically connected to the AC power source, and the driving unit is electrically connected to the second power conversion module. When a current outputted from the first power conversion module is smaller than a specific vale, the driving unit makes the second power conversion module operate in a sleep mode to stop outputting current and to reduce level of outputting voltage.

Description

electronic system

The present invention relates to electronic systems, and more particularly to an electronic system having a plurality of sets of power conversion modules arranged in parallel.

Switched power converters are typically the basic power supply unit used to deliver power to meet the needs of electronic devices. For example, DC-DC converters are typically designed to convert a DC voltage level to one or several different DC voltage levels to meet a range of specifications.

When the load capacity of the electronic device is increased, it is the easiest way to increase the output power of the power converter to meet the load capacity of the electronic device. Such a design can meet the specifications of the electronic device in non-light load operation; When the electronic device is operated under light load, it will cause serious power loss.

The invention provides an electronic system with multiple sets of power conversion modules, and can control the operating state of the power conversion module according to the operating state of the electronic device to change the output power, thereby reducing power consumption.

According to the present invention, an electronic system is provided that is electrically connected to an alternating current power source. The electronic system includes a switching element and a parallel power conversion device. The parallel power conversion device comprises a first power conversion module, a second power conversion module and a driving unit, and the first power conversion module is electrically Connected to the AC power source and the switching element, the second power conversion module is electrically connected to the AC power source. The driving unit is electrically connected to the second power conversion module. When the current output by the first power conversion module is less than a specific value, the driving unit drives the second power conversion module to enter a sleep state, so that the second power conversion module reduces the output voltage. And stop the output current.

The parallel power conversion device of the present invention has changed the input power according to the operating state of the electronic device, and can effectively reduce the overall power loss of the electronic system.

1, 1a‧‧‧ parallel power conversion device

10‧‧‧First power conversion module

100‧‧‧ first converter

1000‧‧‧First current distribution unit

2‧‧‧Switching elements

104‧‧‧First sensing element

106‧‧‧First current sampling unit

1060‧‧‧First sampling element

1062‧‧‧First switching element

12‧‧‧Second power conversion module

120‧‧‧Second converter

1200‧‧‧Second current distribution unit

1202‧‧‧Return loop

124‧‧‧Second sensing element

126‧‧‧Second current sampling unit

1260‧‧‧Second sampling element

1262‧‧‧Second switching element

14‧‧‧Power Manager

16‧‧‧Drive unit

160, 170‧ ‧ amplifier

162, 172‧‧‧ comparator

164‧‧‧weight distribution components

18‧‧‧Electromagnetic interference filter

20‧‧‧Rectifier

22‧‧‧Power factor corrector

3‧‧‧AC power supply

5‧‧‧Electronic devices

Io1‧‧‧first current

Io2‧‧‧second current

Out1‧‧‧first power output

Out2‧‧‧second power output

PG‧‧‧ signal output

PS_On‧‧‧ signal receiving end

Q1‧‧‧First semiconductor switch

Q2‧‧‧Second semiconductor switch

R, R1, R2, R3, R4‧‧‧ resistors

Vref‧‧‧reference voltage

1 is a circuit block diagram of an electronic system according to a first embodiment of the present invention; FIG. 2 is a circuit block diagram of an electronic system according to a second embodiment of the present invention; and FIG. 3 is a partial view of the parallel power conversion device of the present invention. FIG. 4 is a circuit block diagram showing an operation of the electronic device shown in FIG. 2; and FIG. 5 is a circuit block diagram of the electronic device according to the third embodiment of the present invention.

Please refer to FIG. 1 , which is a circuit block diagram of an electronic system according to a first embodiment of the present invention. The electronic system includes a parallel power conversion device 1, a switching element 2, and an electronic device 5. The parallel power conversion device 1 includes a first power output terminal Out1 and a second power output terminal Out2, and the switching element 2 is disposed in the parallel power conversion device 1 The first power output terminal Out1 and the electronic device 5 are controlled by the power manager 14 in the parallel power conversion device 1 to determine whether the power output by the first power output terminal Out1 is transmitted to the electronic device 5. The second power output terminal Out2 of the parallel power conversion device 1 is directly electrically connected to the electronic device 5 for outputting power to the electronic device 5.

2 is a circuit block diagram of a parallel power supply conversion device for an electronic system according to a second embodiment of the present invention. The parallel power conversion device 1 is electrically connected between the AC power supply 3 and the electronic device 5, and the parallel power conversion device 1 converts the AC power output from the AC power supply 3 into electric power suitable for the electronic device 5.

In general, the electronic device 5 is operable in an off mode, a non-standby mode, and a standby mode. In the off mode, although the electronic device 5 is connected to the parallel power conversion device 1, it cannot perform any function through an external signal, so the electronic device 5 has no power loss. In the non-standby mode, the electronic device 5 can perform the main functions; meanwhile, in the non-standby mode, the electronic device 5 can be divided into non-light load operation and light load operation depending on the operating current, wherein non-light load operation is required. The current is greater than the current required for light load operation, and the light load operation can be, for example, when the electronic device 5 is operating in a half load state. In the standby mode, the electronic device 5 does not perform the main function, but can receive an external signal to enter the non-standby mode. The parallel power conversion device 1 of the present invention can provide different power conversion modes to reduce the overall power consumption when the electronic device 5 operates in a non-light load state and a light load state.

The parallel power conversion device 1 includes a first power conversion module 10, a second power conversion module 12, a power manager 14, a driving unit 16, and a switching element 2. The first power conversion module 10 is electrically connected to the AC power source 3 and includes a first power output terminal Out1 (shown in FIG. 1); the second power conversion module 12 is electrically connected to the AC power source 3 and includes a second power output terminal. Out2 (as shown in Figure 1). The driving unit 16 is electrically connected to the first power conversion module 10 and the second power conversion module 12 . The switching element 2 is interposed between the first power conversion module 10 and the electronic device 5, and is controlled to be turned on or off by the power manager 14. The switching element 2 is electrically connected to the first power conversion module 10, the power manager 14, and the electronic device 5.

The power manager 14 is electrically connected to the first power conversion module 10, the second power conversion module 12, the switching element 2, and the electronic device 5. The power manager 14 is used to sense the operating state of the electronic device 5. As shown in FIG. 2, the power manager 130 includes a signal output terminal PG and a signal receiving terminal PS_On. The power manager 130 sends a signal to the electronic device 5 through the signal output terminal PG, and receives the electronic device 5 back-transmitted by the signal receiving terminal PS_On. signal.

When the electronic device 5 is operated in the non-light-load operation in the non-standby mode, the first power conversion module 10 and the second power conversion module 12 respectively output power through the first power output terminal Out1 and the second power output terminal Out2 ( For example, voltage and current) to the electronic device 5. The operating current required for the operation of the electronic device 5 during the non-light load operation is averaged by the first power conversion module 10 and the second power conversion module 12; for example, when the operating current required by the electronic device 5 is 1 ampere. The first power conversion module 10 and the second power conversion module 12 respectively provide 0.5 amps to the electronic device 5.

When the electronic device 5 operates in the light load mode in the non-standby mode, the driving unit 16 drives the second power conversion module 12 to lower the output voltage while stopping the output current to reduce power consumption.

When the electronic device 5 is operated in the standby mode, the driving unit 16 drives the second power conversion module 12 to lower the output voltage while stopping the output current to reduce power consumption. At the same time, the power manager 14 drives the switching element 2 to open, and the power output by the first converter 100 is not transmitted to the electronic device 5 through the switching element 2.

The first power conversion module 10 includes a first converter 100, a first inductive element 104, and a first current sampling unit 106. The first converter 100 is electrically connected to the AC power source 3 and includes a first current distribution unit 1000. The first sensing element 104 is disposed on the first converter 100 and the switch The components 2 are electrically connected to the first converter 100, the switching element 2, and the power manager 14.

The first current sampling unit 106 is electrically connected to the first converter 100 for sensing the current output by the first converter 100 and feeding back the measured current to the first current distribution unit 1000. The first current sampling unit 106 includes a first sampling element 1060 and a first switching element 1062. The first sampling element 1060 is electrically coupled to the first current distribution unit 1000. The first switching element 1062 is electrically connected to the first sampling element 1060 and the first sensing element 104. The first switching element 1062 is used to prevent the current output by the second power conversion module 12 from entering the first power conversion module 10. The first switching element 1062 can be operated in an open circuit and a closed circuit state, and when the local switching element 1062 is operated in the open state, the current output by the second power conversion module 12 can be prevented from entering the first power conversion module 10.

The second power conversion module 12 includes a second converter 120, a second sensing element 124, and a second current sampling unit 126. The second converter 120 is electrically connected to the AC power source 3 and includes a second current distribution unit 1200 electrically connected to the first current distribution unit 1000. The second sensing element 124 is disposed between the second converter 120 and the electronic device 5 and electrically connected to the second converter 120, the power manager 14, and the electronic device 5.

The second current sampling unit 126 is electrically connected to the second converter 120 for sensing the current output by the second converter 120 and feeding back the measured current to the second current distribution unit 1200. The second current sampling unit 126 includes a second sampling element 1260 and a second switching element 1262. The second sampling element 1260 is electrically coupled to the second current distribution unit 1200. The second switching element 1262 is electrically connected to the second sampling element 1260 and the second sensing element 124. The second switching element 1262 is configured to prevent the current output by the first power conversion module 10 from entering the first Two electric energy conversion modules 12. The second switching element 1262 can be operated in an open circuit and a closed circuit state, and when the local two switching elements 1262 are operated in an open state, the current output by the first power conversion module 10 can be prevented from entering the second power conversion module 12 .

The first current sampling unit 106 and the second current sampling unit 126 respectively extract currents output by the first converter 100 and the second converter 120, and respectively feed the measured currents to the first current distribution unit 1000 and the second Current distribution unit 1200. When the electronic device 5 is in a non-light load operation, the first current sampling unit 106 and the second current sampling unit 126 distribute the current required by the electronic device 5 evenly.

It should be particularly noted that the first sampling element 1060 is not limited to be disposed between the first converter 100 and the electronic device 5, and may be disposed between the AC power source 3 and the first converter 100. Of course, the second sampling element 1260 is not limited to be disposed between the second converter 120 and the electronic device 5, or may be disposed between the AC power source 3 and the second converter 120.

Please refer to FIG. 3 , which is a partial circuit diagram of the parallel power supply device of the present invention. The driving unit 16 includes an operational amplifier 160, a comparator 162, a first switching element Q1, and a second switching element Q2.

The inverting input of operational amplifier 160 is coupled to one of the first inductive elements 104 via resistor R1 and to the output of operational amplifier 160 and the inverting input of comparator 162 via resistor R2. The non-inverting input of operational amplifier 160 is coupled to the other end of first sensing element 104 via resistor R3 and is also coupled to ground via resistor R4.

The non-inverting input of comparator 162 is coupled to a reference voltage Vref. The output of the comparator 162 is electrically connected to the gates of the first switching element Q1 and the second switching element Q2, and the drain of the first switching element Q1 is electrically connected to the weight distribution element 164. When the comparator 162 outputs a low level signal, the first semiconductor switch Q1 is turned on (ie, shorted), and the gain of the feedback loop 1202 located in the second converter 120 is lowered, thereby lowering the output voltage of the second converter 120. It should be particularly noted that in addition to the feedback loop provided inside the second converter 120 to change the output gain of the second converter 120, the first converter 120 may also be provided with a feedback loop inside, and the feedback loop is provided. The function is to control the gain of the first converter 120, and thus the magnitude of the voltage or current output by the first converter 120.

The second switching element Q2 is simultaneously electrically coupled to the non-inverting input of the amplifier 170. The output of the amplifier 170 is electrically coupled to the inverting input of the comparator 172 via a resistor R, and the output of the comparator 172 is passed through the diode D. Connected to the second converter 120. When the comparator 162 outputs a low level signal, the second semiconductor switch Q2 is turned on to cause the output of the amplifier 170 to output a low level signal, and the output of the comparator 172 outputs a high level signal, and the diode D is disconnected. The connection to the second converter 120 is interrupted. Thereby, when the parallel power conversion device 1 is operated at light load, the driving unit 16 can reduce the power loss by reducing the output voltage of the second converter 120 and interrupting the output current of the second converter 120.

It should be particularly noted that the parallel power conversion device 1 of the present invention is not limited to only include the first power conversion module 10 and the second power conversion module 12; in actual implementation, the parallel power conversion device 1 may include two The above is a power conversion module connected in parallel, and one of the power conversion modules is connected to the switching element 2, and the other power conversion modules are electrically connected to the driving unit 16, respectively. When the electronic device 5 operates in a light load in the non-standby mode In the operation and standby mode, the parallel power conversion device 1 can output power of the electronic device 5 in the light load operation and standby mode using only a single power conversion module; and when the electronic device 5 operates in the non-standby mode, the light is not light. During the operation, the parallel power conversion device 1 gradually increases the number of power conversion modules for providing the operating power of the electronic device 5 in accordance with the increase in power demanded by the electronic device 5.

Referring to FIG. 2, the parallel power conversion device 1 further includes an electromagnetic interference filter 18, a rectifier 20, and a power factor corrector 22. The electromagnetic interference filter 18 is electrically connected to the alternating current power source 3, and the electromagnetic interference filter 18 is configured to filter out electromagnetic noise in the alternating current power output from the alternating current power source 3.

The rectifier 20 is electrically connected to the electromagnetic interference filter 18 for filtering out the electromagnetic noise generated by the power conversion module 12, and converting the power output from the AC power source 3 into a full-wave rectified power of reactive power correction. Rectifier 20 can be, for example, a bridge rectifier in a full bridge rectifier.

The power factor corrector 22 is electrically connected to the rectifier 20, the first power conversion module 10, and the second power conversion module 12 for adjusting the full-wave rectified power output by the rectifier 20, so that the full-wave rectified voltage waveform is approximated as much as possible. Current waveform. The power factor corrector 22 may be an active power factor corrector composed of active components (eg, power type switching elements and their control circuits); of course, the power factor corrector 22 does not exclude passive types that may be composed of capacitors and inductors. A power factor correction circuit is implemented. In general, the active power factor corrector can increase the power factor value compared with the passive power factor corrector, which can effectively improve the power utilization rate and has the characteristics of energy saving.

Referring to FIG. 4, it is an operation timing diagram corresponding to the electronic system shown in FIG. 2. In FIG. 4, AC_On is used to indicate the operating state of the AC power source 3, when the AC power source 3 is activated, AC_On assumes a high level state. Vout is the total voltage output by the parallel power conversion module 1, V2 is the voltage output by the second power conversion module 12, and Iout is the total current output by the parallel power conversion module 1 (the first current Io1 shown in FIG. 2) And the sum of the second current Io2). I1 is the current value output by the first converter 100, I2 is the current value output by the second converter 120, and IBus is the total output current of the analog power conversion module 12 at the first current distribution unit 1000 and the second current distribution unit 1200. Ilocal2 is the current delivered by the second sampling element 1260 to the second current distribution unit 1200.

As can be seen from FIG. 4, at time t1, the AC power source 3 is activated (ie, AC_On is a high level signal). At time t2, the parallel power conversion module 1 outputs current to the electronic device 5 (ie, Iout is converted from a low level signal to a high level signal). As can be seen from FIG. 4, at time t2, the second power conversion module 12 has no output current, so the total current required for the operation of the electronic device 5 is provided by the first power conversion module 10.

At time t3-t4, the first power conversion module 10 and the second power conversion module 120 perform current distribution to supply half of the current required by the electronic device 5, respectively. Therefore, the output current of the second converter 120 rises (i.e., I2 rises), and the output current of the first converter 100 decreases (i.e., I1 falls).

At time t4-t6, the electronic device 5 is in light load operation, so the total output current of the parallel power conversion module 1 is decreased (ie, Iout is decreased), then the output current (I1) of the first converter 100 and the second converter are The output current (I2) of 120 is simultaneously decreased by Io_slave.

When the total current (Iout) output from the parallel power conversion module 1 is less than a predetermined value, the first converter 100 is subjected to all current outputs required for the operation of the electronic device 5, as shown at time t5. Therefore, the output current (I2) of the second converter 120 is reduced to zero, and the first converter 100 Since it is necessary to withstand the pumping of all the electronic devices 5, the output current (I1) of the first converter 100 rises.

At time t6, the electronic device 5 is again in the non-light load state, and the total current (Iout) of the total output of the parallel power conversion module 1 rises, and the first converter 110 first rises to bear all current outputs. When the total output current (Iout) of the parallel power conversion module 1 is greater than a predetermined value, the second converter 120 is restarted and the output current (I2) of the second converter 120 is gradually increased, and the output current of the first converter 100 is increased. (I1) gradually decreases until the time t7, the total output current Iout is equally distributed by the output current (I1) of the first converter 100 and the output current (I2) of the second converter 120.

At time t8, the AC power source 3 is turned off, and the voltage and current output by the first converter 110 and the second converter 120 are gradually decreased to zero (as indicated by time t9).

Please refer to FIG. 5, which is a circuit block diagram of an electronic system according to a third embodiment of the present invention. The electronic system shown in FIG. 4 is substantially the same as the electronic system shown in FIG. 2, and differs only in the arrangement position of the switching element 2.

In FIG. 2, the switching element 120 is one of the components of the parallel power conversion device 1, and is controlled by the power manager 14 to be in a closed state or an open state. When the electronic device 5 operates in the non-standby mode, the power manager 14 causes the switching element 2 to be closed, whereby the power output by the first converter 100 can be transmitted to the electronic device 5. When the electronic device 5 is operated in the standby mode, the power manager 14 opens the switching element 2, so that the power output by the first power conversion module 10 is not transmitted to the electronic device 5 through the switching element 2.

In FIG. 5, the switching element 2 is disposed in the electronic device 5, and receives the control of the power manager 14 of the parallel power conversion device 1a to be in a closed state or an open state. In Figure 5 In the circuit architecture, the power output by the first power conversion module 10 is transmitted to the electronic device 5 regardless of whether the electronic device 5 is operating in the non-standby mode or the standby mode. After that, if the power manager 14 determines that the electronic device 5 is operating in the standby mode, the switching element 2 is opened, and the power output from the first converter 100 is prevented from being transmitted to other components in the electronic device 5 through the switching element 2; When it is determined that the electronic device 5 is operating in the non-standby mode, the switching element 2 is closed, and the power output from the first power conversion module 10 is supplied to other components in the electronic device 5. The functions and related descriptions of other components of the parallel power conversion device 1a are substantially the same as those of the parallel power conversion device 1 of the second embodiment, and will not be described herein. The electronic system shown in FIG. 5 can at least achieve the same function as the electronic system shown in FIG. 2.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and retouched without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application.

1‧‧‧Parallel power conversion device

10‧‧‧First power conversion module

100‧‧‧ first converter

1000‧‧‧First current distribution unit

104‧‧‧First sensing element

106‧‧‧First current sampling unit

1060‧‧‧First sampling element

1062‧‧‧First switching element

12‧‧‧Second power conversion module

120‧‧‧Second converter

1200‧‧‧Second current distribution unit

124‧‧‧Second sensing element

126‧‧‧Second current sampling unit

1260‧‧‧Second sampling element

1262‧‧‧Second switching element

14‧‧‧Power Manager

16‧‧‧Drive unit

18‧‧‧Electromagnetic interference filter

2‧‧‧Switching elements

20‧‧‧Rectifier

22‧‧‧Power Factor Corrector

3‧‧‧AC power supply

5‧‧‧Electronic devices

PG‧‧‧ signal output

PS_On‧‧‧ signal receiving end

Io1‧‧‧first current

Io2‧‧‧second current

Claims (9)

An electronic system electrically connected to an AC power source, the electronic system comprising: a switching element; and a parallel power conversion device comprising: a first power conversion module electrically connected to the AC power source and the switching element; The second power conversion module is electrically connected to the AC power source; a driving unit is electrically connected to the second power conversion module, and the driving unit drives the current outputted by the first power conversion module to be less than a specific value. The second power conversion module enters a sleep state, so that the second power conversion module reduces the output voltage and stops the output current. The electronic system of claim 1, wherein the first power conversion module comprises a first converter, a first current sampling unit and a first current distribution unit, the first current sampling unit is electrically connected to The first converter and the first current distribution unit, the second power conversion module includes a second converter, a second current sampling unit and a second current distribution unit, the second current sampling unit is electrically connected to The second converter and the second current distribution unit, when the current output by the first power conversion module is greater than the specific value, the driving unit releases the second power conversion module to a sleep state, the first current distribution The unit and the second current distribution unit cause the first converter and the second converter to evenly distribute the current output by the parallel power conversion device. The electronic system of claim 2, wherein the voltage output by the second power converter is non-zero when the second power converter enters a sleep state. The electronic system of claim 2, wherein the first power conversion module further comprises a first sensing component disposed between the first current sampling unit and the switching component, the driving unit comprising an amplifier, a a comparator, a first semiconductor switch and a second semiconductor switch, the amplifier is electrically connected to the first sensing element, the comparator is electrically connected to the amplifier, and the first semiconductor switch and the second semiconductor switch are electrically connected to The second converter. The electronic system of claim 2, wherein the electronic system further comprises an electronic device electrically connected to the switching element and the second electrical energy conversion module, the parallel power conversion device further comprising a power manager, The power manager is electrically connected to the first power conversion module, the second power conversion module, and the electronic system, wherein the switching element is turned on or off according to the control of the power manager by the first power conversion The module outputs and delivers power to the electronic device. The electronic system of claim 5, wherein the first current sampling unit comprises a first sampling component and a first switching component, the first sampling component being disposed between the first converter and the electronic device The second current sampling unit includes a second sampling component and a second switching component. The second sampling component is disposed between the second converter and the electronic device. The electronic system of claim 5, wherein the parallel power conversion device comprises the switching element. The electronic system of claim 5, wherein the electronic device comprises the switching element. The electronic system of claim 1, wherein the parallel power conversion device further comprises: an electromagnetic interference filter electrically connected to the alternating current power source; a rectifier electrically connected to the electromagnetic interference filter; and a power factor The corrector is electrically connected to the rectifier, the first power conversion module and the second power conversion module.