TWM461257U - Energy-saving power converter - Google Patents

Description

Energy-saving power converter

This creation is about a power converter, especially an energy-saving power converter.

Please refer to the second figure, which is a block diagram of a related art power converter; a related art power converter 50 is applied to a power supply device 20 and a load device 30; the related art power converter 50 is For example, a flyback converter.

The power converter 50 of the related art includes a transformer 102, a first switching unit 104, a first switching controller 114, a ㄧ diode 52, and an output capacitor 118. The transformer 102 includes a transformer primary side 120 and A transformer secondary side 122.

The primary side 120 of the transformer is electrically connected to the power supply device 20 and the first switch unit 104; the first switch controller 114 is electrically connected to the first switch unit 104; the diode 52 is electrically connected to the Transformer secondary side 122, the output terminal capacitor 118 and the load device 30.

When the first switching unit 104 is turned on (controlled by the first switch controller 114), the transformer primary side 120 begins to store energy. When the first switching unit 104 is not conducting (controlled by the first switch controller 114), the transformer secondary side 122 begins to release energy via the diode 52. This is the basic working principle of a general flyback converter.

The structure of the power converter 50 of the related art described above is simple; however, the power converter 50 of the related art described above has a drawback in that the power consumption of the diode 52 is still too high.

In order to improve the above disadvantages of the prior art, the purpose of the present invention is to provide an energy-saving power converter.

In order to achieve the above object of the present invention, the energy-saving power converter of the present invention is applied to a power supply device and a load device. The energy-saving power converter comprises: a transformer, the transformer includes a transformer primary side, a transformer two a secondary side and a transformer secondary auxiliary winding, the primary side of the transformer is electrically connected to the power supply device; a first switching unit, the first switching unit is electrically connected to the primary side of the transformer; a second switching unit, The second switch unit is electrically connected to the secondary side of the transformer and the load device; and a comparison unit, the comparison unit includes a comparison unit output end, a comparison unit first input end, and a comparison unit second input end, The output unit of the comparison unit is electrically connected to the second switch unit, the first input end of the comparison unit is electrically connected to the secondary side auxiliary winding of the transformer, and the second input end of the comparison unit is electrically connected to the secondary side of the transformer Auxiliary winding. Wherein, when the first switching unit is turned on, the primary side of the transformer starts to store energy, the secondary side auxiliary winding of the transformer generates a secondary side voltage, and the voltage of the second input end of the comparing unit is greater than the voltage of the first input end of the comparing unit The comparison unit does not turn on the second switch unit; when the first switch unit is not turned on, the voltage of the second input end of the comparison unit is less than the voltage of the first input end of the comparison unit, and the comparison unit turns on the second switch unit, The secondary side of the transformer transmits a secondary current to the load device via the second switching unit.

10‧‧‧Energy-efficient power converter

20‧‧‧Power supply unit

30‧‧‧Loading device

40‧‧‧secondary current

50‧‧‧Power converters for related technologies

52‧‧‧ diode

60‧‧‧secondary voltage

102‧‧‧Transformers

104‧‧‧First switch unit

106‧‧‧Second switch unit

108‧‧‧Comparative unit

114‧‧‧First switch controller

116‧‧‧Input capacitance

118‧‧‧Output capacitor

120‧‧‧Transformer primary side

122‧‧‧Transformer secondary side

124‧‧‧Transformer secondary side auxiliary winding

128‧‧‧Compare unit output

130‧‧‧Comparative unit first input

132‧‧‧Comparative unit second input

The first picture is a block diagram of the energy-saving power converter of the creation.

The second figure is a block diagram of a power converter of the related art.

Please refer to the first figure, which is a block diagram of the energy-saving power converter of this creation. An energy-saving power converter 10 is applied to a power supply device 20 and a load device 30.

The energy-saving power converter 10 includes a transformer 102, a first switch unit 104, a second switch unit 106, a comparison unit 108, a first switch controller 114, an input capacitor 116, and an output capacitor 118. .

The transformer 102 includes a transformer primary side 120, a transformer secondary side 122, and a transformer secondary side auxiliary winding 124. The comparison unit 108 includes a comparison unit output terminal 128, a comparison unit first input terminal 130, and a comparison unit. Second input 132.

The primary side 120 of the transformer is electrically connected to the power supply device 20; the first switch unit 104 is electrically connected to the primary side 120 of the transformer; the second switch unit 106 is electrically connected to the secondary side 122 of the transformer and the load Device 30.

The comparison unit output terminal 128 is electrically connected to the second switch unit 106; the comparison unit first input end 130 is electrically connected to the transformer secondary side auxiliary winding 124; the comparison unit second input end 132 is electrically connected to The secondary side auxiliary winding 124 of the transformer.

The first switch controller 114 is electrically connected to the first switch unit 104; the input terminal capacitor 116 is electrically connected to the power supply device 20 and the transformer primary side 120; the output terminal capacitor 118 is electrically connected to the first The second switch unit 106 and the load device 30.

When the first switching unit 104 is turned on (controlled by the first switch controller 114), the transformer primary side 120 begins to store energy, and the transformer secondary side auxiliary winding 124 generates a secondary side voltage 60 (in the comparison) The second input terminal 132) of the cell, the voltage of the second input terminal 132 of the comparison unit is greater than the voltage of the first input terminal 130 of the comparison unit, and the comparison unit 108 does not conduct (eg, output a low potential) the second switch unit 106.

When the first switching unit 104 is not conducting (controlled by the first switch controller 114), the voltage of the second input terminal 132 of the comparing unit is less than the voltage of the first input terminal 130 of the comparing unit (because the secondary side A voltage 60 is generated at the first input terminal 130 of the comparison unit, the comparison unit 108 turns on (eg, outputs a high potential) the second switching unit 106, and the transformer secondary side 122 transmits one or two via the second switching unit 106. The secondary side current 40 is to the load device 30; in other words, when the first switching unit 104 is non-conducting, the transformer secondary side 122 begins to release energy via the second switching unit 106.

The power consumption of the second switching unit 106 will be less than the power consumption of the diode; thereby, the power consumption of the energy-saving power converter 10 will be less than that of the related art power converter 50 as shown in the second figure. The power consumption of the current flowing through the diode 52.

The comparison unit 108 can be, for example but not limited to, a comparator, a power amplifier comparison circuit, or a differential comparison circuit.

When the comparison unit 108 is a comparator, the comparison unit output terminal 128 is a comparator output terminal, the comparison unit first input terminal 130 is a comparator non-inverting input terminal, and the comparison unit second input terminal 132 Is a comparator inverting input.

The first switch unit 104 can be, for example but not limited to, a metal oxide semiconductor field effect transistor (hereinafter abbreviated as MOSFET), and an insulation gate bipolar transistor (hereinafter referred to as an insulation gate bipolar transistor). It is an IGBT) or a silicon controlled rectifier (hereinafter abbreviated as SCR).

The second switching unit 106 can be, for example but not limited to, a metal oxide half field effect transistor, an insulated gate bipolar transistor, or a voltage controlled rectifier.

The transformer 102 can be, for example but not limited to, a flyback transformer, a forward transformer, an inductor-inductor-capacitor resonant transformer (hereinafter referred to as LLC resonance). Transformer) or a push pull transformer.

Furthermore, the second switching unit 106 can also be disposed on the low voltage side of the secondary side 122 of the transformer.

The characteristics of this creation are:

1. When the first switching unit 104 is turned on, the secondary side auxiliary winding 124 of the transformer generates the secondary side voltage 60, and the voltage of the second input end 132 of the comparing unit is greater than the voltage of the first input end 130 of the comparing unit. The comparison unit 108 does not turn on the second switching unit 106.

2. When the first switching unit 104 is not turned on, the voltage of the second input terminal 132 of the comparing unit is less than the voltage of the first input terminal 130 of the comparing unit, and the comparing unit 108 turns on the second switching unit 106, the transformer 2 The secondary side 122 transmits a secondary side current 40 to the load device 30 via the second switching unit 106.

3. The power consumption of the second switching unit 106 will be less than the power consumption of the diode; thereby, the power consumption of the energy-saving power converter 10 will be less than the power conversion of the related art as shown in the second figure. The power consumption of the device 50 (current flowing through the diode 52).

However, the above is only a preferred embodiment of the present invention, and the scope of the present invention cannot be limited, that is, the equal changes and modifications made by the scope of the patent application of the present invention should still be covered by the patent of the present invention. The scope of the scope is intended to protect. In summary, when Zhiben's creation has industrial applicability, novelty and progressiveness, and the structure of this creation has not been seen in similar products and public use, it fully complies with the requirements of new patent applications and applies for patent law.

10‧‧‧Energy-efficient power converter

20‧‧‧Power supply unit

30‧‧‧Loading device

40‧‧‧secondary current

60‧‧‧secondary voltage

102‧‧‧Transformers

104‧‧‧First switch unit

106‧‧‧Second switch unit

108‧‧‧Comparative unit

114‧‧‧First switch controller

116‧‧‧Input capacitance

118‧‧‧Output capacitor

120‧‧‧Transformer primary side

122‧‧‧Transformer secondary side

124‧‧‧Transformer secondary side auxiliary winding

128‧‧‧Compare unit output

130‧‧‧Comparative unit first input

132‧‧‧Comparative unit second input

Claims (10)

An energy-saving power converter is applied to a power supply device and a load device, the energy-saving power converter comprising:
a transformer comprising a transformer primary side, a transformer secondary side and a transformer secondary side auxiliary winding, the primary side of the transformer being electrically connected to the power supply device;
a first switching unit electrically connected to the primary side of the transformer;
a second switching unit electrically connected to the secondary side of the transformer and the load device; and a comparison unit including a comparison unit output end, a comparison unit first input end, and a comparison a second input end of the unit, the output end of the comparison unit is electrically connected to the second switch unit, the first input end of the comparison unit is electrically connected to the secondary side auxiliary winding of the transformer, and the second input end of the comparison unit is electrically connected To the secondary side auxiliary winding of the transformer,
Wherein, when the first switching unit is turned on, the primary side of the transformer starts to store energy, the secondary side auxiliary winding of the transformer generates a secondary side voltage, and the voltage of the second input end of the comparing unit is greater than the voltage of the first input end of the comparing unit The comparison unit does not turn on the second switch unit; when the first switch unit is not turned on, the voltage of the second input end of the comparison unit is less than the voltage of the first input end of the comparison unit, and the comparison unit turns on the second switch unit, The secondary side of the transformer transmits a secondary current to the load device via the second switching unit. The energy-saving power converter described in claim 1 of the patent scope further includes:
a first switch controller electrically connected to the first switch unit. The energy-saving power converter described in claim 2 of the patent scope further includes:
An input capacitor is electrically connected to the power supply device and the primary side of the transformer. The energy-saving power converter described in claim 3 of the patent scope further includes:
An output capacitor is electrically connected to the second switch unit and the load device. The energy-saving power converter of claim 4, wherein the comparison unit is a differential comparison circuit. The energy-saving power converter of claim 4, wherein the comparing unit is a power amplifier comparing circuit. The energy-saving power converter of claim 4, wherein the comparing unit is a comparator, the output of the comparing unit is a comparator output, and the first input of the comparing unit is a comparison. The non-inverting input terminal has a second input terminal of the comparison unit as a comparator inverting input terminal. The energy-saving power converter of claim 4, wherein the first switching unit is a gold-oxygen half field effect transistor, an insulated gate bipolar transistor or a controlled rectifier. The energy-saving power converter of claim 4, wherein the second switching unit is a metal oxide half field effect transistor, an insulated gate bipolar transistor or a controlled rectifier. The energy-saving power converter according to claim 4, wherein the transformer is a flyback transformer, a forward transformer, an inductor-capacitor resonant transformer or a push-pull transformer.