CN100397276C - Electronic Power Regulator - Google Patents

Abstract

The invention relates to an electronic power regulator, comprising: an input port including a first end and a second end; the output port comprises a first end and a second end, and the second end of the output port is electrically connected with the second end of the input port to provide an output voltage; a switch group electrically connected between the input port and an AC power supply; one end of the capacitor is electrically connected with the first end of the input port, and the other end of the capacitor is electrically connected with the first end of the output port; one end of the inductor is electrically connected with the first end of the input port; and the electric energy converter comprises an electric energy storage device, a first output end and a second output end, the first output end is electrically connected with the other end of the inductor, the second output end is electrically connected with the first end of the output port, and when the alternating current power supply is abnormal, the electric energy converter converts the electric energy of the electric energy storage device to output and stabilize the output voltage.

Description

Electronic Power Regulator

technical field

The invention provides a voltage stabilizer for a power supply, especially a voltage stabilizer applied to an electronic power supply.

Background technique

Please refer to Figure 1(a), which is a circuit block diagram of a common isolated mechanical power regulator. As shown in FIG. 1( a ), the isolated mechanical power regulator 1 includes an isolated transformer 11 , a relay switch 12 and an input voltage detection circuit 13 . The isolated mechanical power supply regulator 1 utilizes the input voltage detection circuit 13 to detect an input voltage V _in , and according to the magnitude of the input voltage V _in , the input voltage detection circuit 13 sends a trigger signal to actuate the relay switch 12 , using the relay switch 12 to change a coil turn ratio of the isolation transformer 11 to provide a stable output voltage V _out .

Please refer to Figure 1(b), a circuit block diagram of a common non-isolated mechanical power regulator. As shown in FIG. 1( b ), the non-isolated mechanical power supply regulator 2 includes a multi-tap autotransformer 21 , a relay switch 22 and an input voltage detection circuit 23 . The non-isolated mechanical power supply regulator 2 also utilizes the input voltage detection circuit 23 to detect an input voltage V _in , and according to the magnitude of the input voltage V _in , the input voltage detection circuit 23 sends a trigger signal to actuate the relay switch 22. Use the relay switch 22 to change a coil turn ratio of the multi-tap autotransformer 21 to provide a stable output voltage V _out .

According to the above, these mechanical power supply regulators 1 and 2 all use coil turn ratio conversion to stabilize voltage, so this type of power supply regulator has the following disadvantages: (1) These mechanical power supply regulators The system response of the system is slow and its output voltage adjustment rate is high; (2) these mechanical power supply regulators need to use bulky transformers, resulting in low power density of these power supply regulators; and (3) these mechanical power supply The voltage borne by the primary coil of the voltage stabilizer transformer must be at the mains voltage level whether it is isolated or non-isolated.

Please refer to FIG. 2( a ), which is a schematic circuit diagram of a common first electronic power supply regulator. As shown in Figure 2(a), the first electronic power supply regulator 3 is an electronic circuit composed of at least one electronic switch 31, at least one resistor 32, at least one capacitor 33 and at least one inductor 34, and utilizes high Frequency electronic switching technology provides a stable voltage.

Please refer to FIG. 2( b ), which is a schematic circuit diagram of a common second electronic power supply regulator. As shown in Figure 2(b), the second electronic power supply regulator 4 is an electronic circuit composed of at least one electronic switch 41, at least one resistor 42, at least one capacitor 43 and at least one inductor 44, and utilizes high Frequency electronic switching technology provides a stable voltage.

These electronic power supply regulators have the following disadvantages: (1) These electronic power supply regulators have a phase shift in the output and input voltage phases, and the phase shift is related to the load current condition of the device, so it is impossible to design these electronic power supply voltage regulators. An output and an input of the voltage regulator have a bypass path, causing the system reliability to drop; and (2) these electronic power regulators do not have a DC link connection path inside, and a battery pack cannot be added inside. It is used as a backup power supply when the mains power is abnormal.

Contents of the invention

The purpose of the present invention is to provide an electronic power supply voltage stabilizer, which can achieve the purpose of load voltage stabilization by using the mains voltage series compensation method.

Another object of the present invention is to provide an electronic power supply voltage stabilizer, which can control the output voltage at a fixed value and enhance the overall voltage stabilization effect.

Another object of the present invention is to use the mains voltage series compensation method to reduce the compensation voltage stress that the device must bear, thereby reducing the switching loss of the power converter, and achieving the purpose of improving the overall operating efficiency of the device.

Another object of the present invention is to provide an electronic power supply stabilizer, which provides a DC link connection path inside the electronic power supply stabilizer, and adds a battery pack inside, which can be used as a backup power supply when the mains power is abnormal. for.

To achieve the above object, the present invention provides an electronic power supply regulator, comprising: an input port, including a first end and a second end; an output port, including a first end and a second end, and The second end of the output port is electrically connected to the second end of the input port to provide an output voltage; a switch group is electrically connected between the input port and an AC power supply; a capacitor, one end of which is electrically connected to the input port a first end, the other end of which is electrically connected to the first end of the output port; an inductor, one end of which is electrically connected to the first end of the input port; and an electric energy converter, including an electric energy storage device, a first output end and a The second output end, the first output end is electrically connected to the other end of the inductor, the second output end is electrically connected to the first end of the output port, when the AC power supply is abnormal, the power converter will use the power storage device The power conversion output stabilizes the output voltage.

According to the above idea, the switch group further includes: a first connection configuration, when the voltage and frequency variation of the AC power supply are within a predetermined range, the first end of the input port and the second end are directly connected to each other. electrically connected to the AC power; and a second connection configuration, when the voltage or frequency variation of the AC power exceeds the predetermined range, the first end of the input port is directly electrically connected to the second end.

According to the above idea, wherein the electric energy storage device is a storage battery.

According to the above idea, the electric energy converter further includes an inverter.

According to the above idea, wherein the AC voltage source is a mains voltage source.

The present invention also provides an electronic power regulator, comprising: an input port, including a first end and a second end; an output port, including a first end and a second end, and the output port The second end is electrically connected to the second end of the input port to provide an output voltage; a switch group is electrically connected between the input port and an AC power supply; a capacitor, one end of which is electrically connected to the first end of the input port, The other end is electrically connected to the first end of the output port; an inductor, one end of which is electrically connected to the first end of the input port; and an electric energy converter, including an electric energy storage device, a first output end and a second output end , the first output end is electrically connected to the other end of the inductor, the second output end is electrically connected to the first end of the output port, and when the output voltage is abnormal, the electric energy converter will stabilize the electric energy conversion output of the electric energy storage device the output voltage.

According to the above idea, the switch group further includes: a first connection configuration, when the voltage and frequency variation of the AC power supply are within a predetermined range, the first end of the input port and the second end are directly connected to each other. electrically connected to the AC power; and a second connection configuration, when the voltage or frequency variation of the AC power exceeds the predetermined range, the first end of the input port is directly electrically connected to the second end.

According to the above idea, wherein the electric energy storage device is a storage battery.

According to the above idea, the electric energy converter further includes an inverter.

According to the above idea, wherein the AC voltage source is a mains voltage source.

Description of drawings

Figure 1(a) is a circuit block diagram of a common isolated mechanical power supply regulator;

Figure 1(b) is a circuit block diagram of a common non-isolated mechanical power supply regulator;

Fig. 2 (a) is the circuit schematic diagram of the common first electronic power supply regulator;

FIG. 2(b) is a schematic circuit diagram of a common second electronic power supply regulator;

Fig. 3 (a)--(b) is the schematic circuit diagram of the optimized electronic power supply regulator of the present invention;

Figure 4 (a)-(c) is a schematic diagram of the waveforms of the AC power supply voltage and output voltage in the stabilized operation of the optimized electronic power supply regulator of the present invention; and

5( a )-( b ) are waveform schematic diagrams of the AC power voltage and output voltage of the optimized electronic power voltage stabilizer of the present invention for backup power operation.

Icon symbol description

1: Isolated mechanical power regulator 11: Isolated transformer

12: Relay switch 13: Input voltage detection circuit

2: Non-isolated mechanical power supply regulator 21: Multi-tap autotransformer

22: Relay switch 23: Input voltage detection circuit

3: The first electronic power regulator 31: Electronic switch

32: Resistor 33: Capacitance

34: Inductor 4: Second electronic power regulator

41: Electronic switch 42: Resistance

43: Capacitance 44: Inductance

5: Electronic power regulator 51: Input port

52: Output port 53: Switch group

54: Capacitance 55: Inductance

56: Electric energy converter 57: Electric energy storage device

58: Inverter 511: First end

512: The second end 521: The first end

522: the second terminal 561: the first output terminal

562: Second output V _s : AC power supply

V _L : Output voltage V _out : Output voltage

Detailed ways

Please refer to FIG. 3 (a)-(b), which are circuit schematic diagrams of the optimized electronic power regulator of the present invention. As shown in Figure 3 (a)-(b), an electronic power supply regulator 5 includes: an input port 51, an output port 52, a switch group 53, a capacitor 54, an inductance 55 and an electric energy Converter 56. The input port 51 includes a first end 511 and a second end 512 . The output port 52 includes a first end 521 and a second end 522, and the second end 522 of the output port 52 is electrically connected to the second end 512 of the input port 51 to provide an output voltage V _L . The switch group 53 is electrically connected between the input port 51 and an AC power source V _s . One end of the capacitor 54 is electrically connected to the first end 511 of the input port 51 , and the other end is electrically connected to the first end 521 of the output port 52 . One end of the inductor 55 is electrically connected to the first end 511 of the input port 51 . And, the electric energy converter 56 includes an electric energy storage device 57, a first output end 561 and a second output end 562, the first output end 561 is electrically connected to the other end of the inductor 55, and the second output end 562 is electrically connected to the first end 521 of the output port 52. When the AC power source V _s is abnormal, the power converter 56 converts the power of the power storage device 57 and outputs it to stabilize the output voltage V _L .

Wherein, the switch group 53 further includes: a first connection configuration and a second connection configuration. The first connection configuration is that when the voltage and frequency variation of the AC power source V _s are within a predetermined range, the first end 511 and the second end 512 of the input port 51 are directly electrically connected to the AC power source V _s . And, the second connection configuration is such that the first end 511 of the input port 51 is directly electrically connected to the second end 512 when the voltage or frequency variation of the AC power source V _s exceeds the predetermined range.

Moreover, the electric energy storage device 57 can be a storage battery. The power converter also includes an inverter 58 . The AC voltage source can be a mains voltage source.

The working principle of the electronic power supply stabilizer of the present invention is described as follows: when the voltage of the AC power supply V _s is within a predetermined range, the first end 511 and the second end 512 of the input port 51 are directly electrically connected to each other. Connect the AC power source V _s . As shown in Figure 3(a). At this time, if the AC power supply V _s is abnormal, the electric energy converter 56 is used to convert and output the electric energy of the electric energy storage device 57 to supplement the shortage of the AC power supply V _s . Once the voltage of the AC power source V _s exceeds the predetermined range, the first terminal 511 and the second terminal 512 of the input port 51 are electrically connected directly. At this moment, the output voltage V _L is provided by the electric energy converter 56 through the electric energy conversion output of the electric energy storage device 57 , so as to maintain the output voltage V _L at a fixed value.

Please refer to FIG. 4( a )-( c ) the schematic diagrams of the waveforms of the AC power voltage and the output voltage of the optimized electronic power voltage stabilizer of the present invention performing voltage stabilizing operation.

Figure 4(a) is the waveform of the output voltage V _L and the voltage of the AC power V _s when the AC power voltage is undervoltage. Figure 4(b) shows the waveforms of the output voltage V _L and the voltage of the AC power V _s when the AC power voltage is normal. Figure 4(c) shows the waveforms of the output voltage V _L and the voltage of the AC power supply V _s when the AC power supply voltage is overvoltage. It can be seen from the measured waveform of the device in FIG. 4 that the technology disclosed in the present invention can indeed achieve a precise constant voltage output control function.

Please refer to FIGS. 5( a )-( b ) which are waveform schematic diagrams of the AC power voltage and the output voltage of the optimized electronic power voltage stabilizer of the present invention for backup power operation.

Figure 5(a) shows the waveforms of the output voltage V _L and the voltage of the AC power V _s when the AC power supply voltage is undervoltage and the power is cut off. Figure 5(b) shows the waveforms of the output voltage V _L and the voltage of the AC power supply V _s when the AC power supply voltage is overvoltage and the power is cut off. As can be seen from this figure, a battery pack added inside the present invention can be used as a backup power supply when the mains power is abnormal.

Based on the above, the present invention can provide an electronic power supply voltage stabilizer, which has the following advantages: (1) The device adopts the mains voltage series compensation method to achieve the purpose of load stabilization, and the electric power borne by the device is reduced at this time. , so the heat loss problem of the device can be greatly improved, and the operating efficiency of the system can be improved. (2) The present invention can carry out constant value control on the output voltage, and strengthen the overall voltage stabilizing effect. (3) The device provides a DC link connection path, and a battery pack can be added inside the device, so the device can be used as a backup power source when the mains power is abnormal. Therefore, the present invention does have industrial utility and practical utilization value.

Claims (12)

1. An electronic power supply regulator, characterized in that, comprising: an input port, including a first end and a second end; An output port, including a first end and a second end, the second end is electrically connected to the second end of the input port to provide an output voltage; A switch group electrically connected between the input port and an AC power source; A capacitor, one end of which is electrically connected to the first end of the input port, and the other end is electrically connected to the first end of the output port; an inductor, one end of which is electrically connected to the first end of the input port; and An electric energy converter, including an electric energy storage device, a first output end and a second output end, the first output end is electrically connected to the other end of the inductor, and the second output end is electrically connected to the first end of the output port , when the AC power supply is abnormal, the electric energy converter converts the electric energy of the electric energy storage device to output and stabilizes the output voltage. 2. The electronic power supply regulator according to claim 1, wherein the switch group further comprises: A first connection configuration, when the voltage of the AC power source is within a predetermined range, the first end and the second end of the input port are directly electrically connected to the AC power source; and A second connection configuration, when the voltage of the AC power source exceeds the predetermined range, the first end of the input port is directly electrically connected to the second end. 3. The electronic power regulator as claimed in claim 1, wherein the electric energy storage device is a storage battery. 4. The electronic power regulator as claimed in claim 1, wherein the power converter further comprises an inverter. 5. The electronic power regulator as claimed in claim 1, wherein the AC voltage source is a mains voltage source. 6. The electronic power supply regulator according to claim 1, wherein the switch group further comprises: A first connection configuration, when the frequency variation of the AC power source is within a predetermined range, the first end and the second end of the input port are directly electrically connected to the AC power source; and A second connection configuration, when the frequency variation of the AC power source exceeds the predetermined range, the first end of the input port is directly electrically connected to the second end. 7. An electronic power supply regulator, characterized in that it comprises: an input port, including a first end and a second end; An output port, including a first end and a second end, the second end is electrically connected to the second end of the input port to provide an output voltage; A switch group electrically connected between the input port and an AC power source; A capacitor, one end of which is electrically connected to the first end of the input port, and the other end is electrically connected to the first end of the output port; an inductor, one end of which is electrically connected to the first end of the input port; and An electric energy converter, including an electric energy storage device, a first output end and a second output end, the first output end is electrically connected to the other end of the inductor, and the second output end is electrically connected to the first end of the output port , when the output voltage is abnormal, the electric energy converter converts and outputs the electric energy of the electric energy storage device to stabilize the output voltage. 8. The electronic power supply regulator according to claim 7, wherein the switch group further comprises: A first connection configuration, when the voltage of the AC power source is within a predetermined range, the first end and the second end of the input port are directly electrically connected to the AC power source; and A second connection configuration, when the voltage of the AC power source exceeds the predetermined range, the first end of the input port is directly electrically connected to the second end. 9. The electronic power regulator as claimed in claim 7, wherein the electric energy storage device is a storage battery. 10. The electronic power regulator as claimed in claim 7, wherein the power converter further comprises an inverter. 11. The electronic power regulator as claimed in claim 7, wherein the AC voltage source is a mains voltage source. 12. The electronic power supply regulator according to claim 7, wherein the switch group further comprises: A first connection configuration, when the frequency variation of the AC power source is within a predetermined range, the first end and the second end of the input port are directly electrically connected to the AC power source; and A second connection configuration, when the frequency variation of the AC power source exceeds the predetermined range, the first end of the input port is directly electrically connected to the second end.

Images