High-power satellite battery discharge circuit and equipment

Abstract

This invention discloses a high-power satellite battery discharge circuit and device. The high-power satellite battery discharge circuit includes: a power input terminal for inputting a first energy voltage; a power output terminal for outputting a second energy voltage; a switching module, grounded, for receiving control signals and switching states according to the control signals; and an energy conversion module, including a first transformer and a second transformer, electrically connected to the power input terminal and electrically connected to the switching module. The first and second transformers convert the first energy voltage according to the switching state to output the second energy voltage to the power output terminal. This invention can reduce the number of energy conversion devices used and realize multiple energy conversion methods, thereby reducing energy loss.

Description

Technical Field

[0001] This invention relates to the field of electronic circuit technology, and in particular to a high-power satellite battery discharge circuit and power supply. Background Technology

[0002] Currently, with the development and expansion of aerospace technology, especially the requirements of new high-precision aerospace equipment, the load characteristics of spacecraft are becoming increasingly diversified, thus continuously raising the power supply requirements for power systems. Among related technologies, the topologies that complete the battery discharge function conversion in power systems can achieve relatively small output power, requiring numerous energy conversion devices, and the energy loss increases during the conversion process. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a high-power satellite battery discharge circuit that can reduce the number of energy conversion devices used, realize multiple energy conversion methods, and thus reduce energy loss.

[0004] This invention also proposes a high-power satellite battery discharge device.

[0005] In a first aspect, one embodiment of the present invention provides a high-power satellite battery discharge circuit, comprising:

[0006] A power input terminal, wherein the power input terminal is used to input a first energy voltage;

[0007] A power output terminal, wherein the power output terminal is used to output a second energy voltage;

[0008] A switching module, which is grounded, is used to receive control signals and switch the switching state according to the control signals;

[0009] An energy conversion module includes a first transformer and a second transformer. The first transformer is electrically connected to the second transformer, and the first transformer and the second transformer are electrically connected to the power input terminal. The second transformer is electrically connected to the switch module. The first transformer and the second transformer convert the first energy voltage according to the switching state to output a second energy voltage to the power output terminal.

[0010] The high-power satellite battery discharge circuit of this invention has at least the following beneficial effects: the first transformer and the second transformer receive the first energy voltage according to the power input terminal, the switching module switches the switching state according to the control signal, and the first transformer and the second transformer perform energy conversion according to the switching state to output the second energy voltage to the power output terminal. This can reduce the number of energy conversion devices used, realize multiple energy conversion methods, and thus reduce energy loss.

[0011] According to other embodiments of the high-power satellite battery discharge circuit of the present invention, the first transformer includes:

[0012] A first winding and a second winding, wherein the first winding is electrically connected to the power input terminal, one end of the second winding is electrically connected to the power output terminal, and the other end of the second winding is grounded; wherein the corresponding terminals of the first winding and the second winding are opposite.

[0013] According to other embodiments of the high-power satellite battery discharge circuit of the present invention, the second transformer includes:

[0014] The system comprises a third winding, a fourth winding, a fifth winding, and a sixth winding. One end of the third winding and one end of the fourth winding are electrically connected to the first winding, and the other ends of the third winding and the fourth winding are electrically connected to the switch module. One end of the fifth winding and one end of the sixth winding are electrically connected to the power input terminal, and the other ends of the fifth winding and the sixth winding are electrically connected to the power output terminal. The corresponding terminals of the third and fourth windings are opposite, and the corresponding terminals of the fifth and sixth windings are opposite.

[0015] According to other embodiments of the high-power satellite battery discharge circuit of the present invention, the control signal includes: a first control signal and a second control signal, and the switching module includes:

[0016] A first switching unit is electrically connected to the third winding, and the first switching unit switches the first switching state according to the first control signal.

[0017] The second switching unit is electrically connected to the fourth winding, and the second switching unit switches the second switching state according to the second control signal.

[0018] According to some embodiments of the present invention, in a high-power satellite battery discharge circuit, the first switching unit is in an on state at a first time according to the first control signal, and in an off state at a second time and a third time according to the first control signal.

[0019] The second switching unit is in a cut-off state at the first time and the second time according to the second control signal, and in a conducting state at the third time according to the second control signal.

[0020] The high-power satellite battery discharge circuit according to other embodiments of the present invention further includes:

[0021] A current limiting module is provided, with one end electrically connected to the first transformer and the second transformer, and the other end electrically connected to the power output terminal, for limiting the transmission of reverse current at the power output terminal.

[0022] According to other embodiments of the high-power satellite battery discharge circuit of the present invention, the current limiting module includes:

[0023] A first diode, the positive terminal of which is electrically connected to the second winding, and the negative terminal of which is electrically connected to the power supply output terminal;

[0024] The second diode has its positive terminal electrically connected to the fifth winding and its negative terminal electrically connected to the power output terminal.

[0025] The third diode has its positive terminal electrically connected to the sixth winding and its negative terminal electrically connected to the power output terminal.

[0026] The high-power satellite battery discharge circuit according to other embodiments of the present invention further includes:

[0027] The filtering module is used to filter out the DC voltage and low-frequency voltage in the second energy voltage.

[0028] According to other embodiments of the high-power satellite battery discharge circuit of the present invention, the filtering module includes:

[0029] A first capacitor, one end of which is electrically connected to the power output terminal, and the other end of which is grounded.

[0030] The first resistor and the first capacitor are connected in parallel.

[0031] In a second aspect, one embodiment of the present invention provides a high-power satellite battery discharge device, including: a high-power satellite battery discharge circuit, as described in the first aspect.

[0032] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the description and the accompanying drawings. Attached Figure Description

[0033] Figure 1 This is a module block diagram of a specific embodiment of the high-power satellite battery discharge circuit in this invention.

[0034] Figure 2 This is a module block diagram of another specific embodiment of the high-power satellite battery discharge circuit in this invention;

[0035] Figure 3 This is a circuit diagram of a specific embodiment of the high-power satellite battery discharge circuit in this invention.

[0036] Figure 4 This is a schematic diagram of a specific embodiment of the control signal in this invention. Attached image description:

[0038] Power input terminal 100, power output terminal 200, switching module 300, energy conversion module 400, first transformer 410, second transformer 420;

[0039] Current limiting module 500, filtering module 600. Detailed Implementation

[0040] The following will describe the concept and technical effects of the present invention clearly and completely with reference to embodiments, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention.

[0041] In the description of this invention, if directional descriptions are involved, such as "up," "down," "front," "back," "left," "right," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, it is only for the convenience of describing the invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. If a feature is referred to as "set," "fixed," "connected," or "installed" on another feature, it can be directly set, fixed, or connected to the other feature, or it can be indirectly set, fixed, connected, or installed on the other feature.

[0042] In the description of the embodiments of the present invention, the term "several" means one or more, and the term "multiple" means two or more. The terms "greater than," "less than," and "exceeding" should be understood as excluding the stated number, while the terms "above," "below," and "within" should be understood as including the stated number. The terms "first" and "second" should be understood as distinguishing technical features, and not as indicating or implying relative importance, the number of indicated technical features, or the order of the indicated technical features.

[0043] Reference Figure 1One embodiment of the present invention discloses a high-power satellite battery discharge circuit. The high-power satellite battery discharge circuit includes: a power input terminal 100, a power output terminal 200, a switching module 300, an energy conversion module 400, a first transformer 410, and a second transformer 420. The power input terminal 100, the power output terminal 200, the switching module 300, the energy conversion module 400, the first transformer 410, and the second transformer 420 are all electrically connected.

[0044] The power input terminal 100 is used to input a first energy voltage. The power output terminal 200 is used to output a second energy voltage. The switch module 300 is grounded and used to receive control signals and switch the switch state according to the control signals. The energy conversion module 400 includes a first transformer 410 and a second transformer 420. The first transformer 410 is electrically connected to the second transformer 420. The first transformer 410 and the second transformer 420 are electrically connected to the power input terminal 100. The second transformer 420 converts the first energy voltage according to the switch state to output the second energy voltage to the power output terminal 200.

[0045] The switching module 300 switches the switching state according to the control signal. The energy conversion module 400 receives the first energy voltage input from the power input terminal 100 according to the switching state, and converts the first energy voltage to obtain a second energy voltage. The energy conversion module 400 then outputs the second energy voltage to the power output terminal 200 according to the switching state. In other words, the first transformer 410 and the second transformer 420 receive the first energy voltage input from the power input terminal 100 according to the switching state, convert the first energy voltage to obtain a second energy voltage, and then output the second energy voltage to the power output terminal 200 according to the switching state. This reduces the number of energy conversion devices used, enables multiple energy conversion methods, and thus reduces energy loss.

[0046] Reference Figure 3 In an embodiment of the present invention, the first transformer 410 includes a first winding and a second winding. The first winding is electrically connected to the power input terminal 100, one end of the second winding is electrically connected to the power output terminal 200, and the other end of the second winding is grounded.

[0047] The first winding receives the first energy voltage input from the power input terminal 100 according to the switching state. The first winding and the second winding convert the first energy voltage into a second energy voltage. The second winding outputs the second energy voltage to the power output terminal 200 according to the switching state.

[0048] It should be noted that, referring to Figure 3 The first winding is Figure 3The first winding is T1, and the second winding is... Figure 3 In winding T2, the terminals of the first and second windings are opposite.

[0049] Reference Figure 3 In an embodiment of the present invention, the second transformer 420 includes a third winding, a fourth winding, a fifth winding, and a sixth winding. One end of the third winding and one end of the fourth winding are electrically connected to the first winding. The other end of the third winding and the other end of the fourth winding are electrically connected to the switch module 300. One end of the fifth winding and one end of the sixth winding are electrically connected to the power input terminal 100. The other end of the fifth winding and the other end of the sixth winding are electrically connected to the power output terminal 200.

[0050] The third and fourth windings receive the first energy voltage input from the power input terminal 100 according to the switching state. The third and fifth windings convert the first energy voltage into energy, or the fourth and sixth windings convert the first energy voltage into energy to obtain the second energy voltage. The fifth and sixth windings output the second energy voltage to the power output terminal 200 according to the switching state.

[0051] It should be noted that, referring to Figure 3 The third winding is Figure 3 The fourth winding is T3. Figure 3 The fifth winding is T4. Figure 3 The sixth winding is T5. Figure 3 In winding T6, the terminals of the third and fourth windings are opposite, and the terminals of the fifth and sixth windings are opposite.

[0052] Reference Figure 3 and Figure 4 In embodiments of the present invention, the control signals include a first control signal and a second control signal. The switching module includes a first switching unit electrically connected to a third winding, which switches a first switching state according to the first control signal. A second switching unit electrically connected to a fourth winding switches a second switching state according to the second control signal.

[0053] It should be noted that, please refer to Figure 3 and Figure 4 The first control signal is Figure 4 The signal Vgs_Q1 in the middle, the second control signal is Figure 4 The signal Vgs_Q2 in the signal. The first switching unit is... Figure 3 The MOSFET Q1 in the middle, the second switching unit is Figure 3 The MOSFET Q2 in the middle. (Through) Figure 4It can be seen that the switching states of the first switching unit and the second switching unit are different at the same time. Therefore, energy conversion is achieved by switching the switching states of the first switching unit and the second switching unit.

[0054] Please refer to Figure 4 The first control signal is 10V, indicating a high level; 0V indicates a low level. Similarly, the second control signal is 10V, indicating a high level, and 0V indicates a low level. Therefore, by switching between high and low levels using the first and second control signals, Q1 and Q2 are alternately closed and opened, simplifying energy conversion control. Energy conversion can be achieved without multiple components, reducing energy loss. This application does not specifically limit the values ​​of the first and second control signals when they are high or low.

[0055] Reference Figure 3 and Figure 4 In an embodiment of the present invention, the first switching unit is in a conducting state at a first time according to the first control signal, and in a cut-off state at a second time and a third time according to the first control signal.

[0056] The second switching unit is in the off state at the first time and the second time according to the second control signal, and in the on state at the third time according to the second control signal.

[0057] It should be noted that, through Figure 4 It can be seen that the first time period is the time interval from t0 to t1, the second time period is the time interval from t1 to t2, and the third time period is the time interval from t2 to t3. After the third time period, the first time period or the second time period can be repeated, and this application does not specifically limit this. Among them, it is necessary to satisfy that the first switching unit and the second switching unit cannot be in the conducting state at the same time.

[0058] (1) When in the first moment:

[0059] The first switching unit is in the ON state, the second switching unit is in the OFF state, and the voltage input from the first winding to the third and fourth windings is V. A The second energy voltage is V out First energy voltage V in Simultaneously, the first and third windings are charged, and due to the back electromotive force, the current in the fifth winding is transmitted to the power output terminal.

[0060] When the first switching unit is in the on state and the second switching unit is in the off state, the current in the first winding increases, and the voltage V across the first winding increases.T1 For: V T1 =V in -V A .

[0061] The volt-second product of the first winding is V. T1 *t on .

[0062] Among them, t on The conduction time of the first winding is DT, also known as the first time.

[0063] According to the working principle of a transformer, the electromotive forces of the third and fifth windings are the same. Assuming that the first and second switching units are ideal switching transistors with zero on-state voltage drop, then the voltage V A This refers to the back electromotive force (EMF) voltages of the third and fifth windings. When the third winding is conducting with freewheeling current, the back EMF voltage of the third winding is:

[0064] V A =V T3 =V T5 ;

[0065] V T5 =V out -V in ;

[0066] The terminal voltage of the first winding can then be calculated as follows:

[0067] V LT1 =2V in -V out ;

[0068] Therefore, when the first switching unit is in the ON state and the second switching unit is in the OFF state, the volt-second product of the first winding is:

[0069] V T1 =2(V in -V out )t on .

[0070] (2) When in the second time:

[0071] The first switching unit is in the off state, the second switching unit is in the off state, and the energy stored in the first winding is converted into energy through the first winding and the second winding, and the second energy voltage is fed back to the power supply.

[0072] When both the first and second switching units are in the off state, the current in the first winding decreases. According to Lenz's law, the current in the second winding increases to oppose the decrease in the current in the first winding. At this time, the voltage on the first winding is equal to the voltage on the second winding. Since the same-name terminals of the first and second windings are opposite, the second energy voltage is -V.out The volt-second product at this point is:

[0073] V T1 =-V out *t off ;

[0074] V T1 =V T2 =V in ;

[0075] t off The first winding is turned off at the second time (1-D)T.

[0076] Based on the volt-second balance principle of inductors, the following formula can be derived:

[0077] 2(V in -V out )*t on -V out *t off =0;

[0078] 2(V in -V out )*DT-V out *(1-D)T=0;

[0079] V out = (2D / (1+D))*V in .

[0080] (3) When in the third time:

[0081] The first switching unit is in the off state, the second switching unit is in the on state, and the first energy voltage V in Simultaneously, the first and fourth windings are charged, and due to the back electromotive force, the current in the sixth winding is transmitted to the power output terminal through the sixth winding.

[0082] When the first switching unit is in the off state and the second switching unit is in the on state, the current in the first winding increases, and the voltage V across the first winding increases. T1 For: V T1 =V in -V A .

[0083] The volt-second product of the first winding is V. T1 *t on .

[0084] Among them, t on The conduction time of the first winding is DT, also known as the first time.

[0085] According to the working principle of a transformer, the electromotive forces of the fourth and sixth windings are the same. Assuming that the first and second switching units are ideal switching transistors with zero on-state voltage drop, then the voltage V A This refers to the back electromotive force (EMF) voltages of the fourth and sixth windings. When the fourth winding is conducting with freewheeling current, the back EMF voltage of the fourth winding is:

[0086] Therefore, when the first switching unit is in the off state and the second switching unit is in the on state, the volt-second product of the first winding is the same:

[0087] V T1 =2(V in -V out )t on .

[0088] Reference Figure 2 One embodiment of the present invention discloses a high-power satellite battery discharge circuit. The high-power satellite battery discharge circuit further includes a current-limiting module 500 and a filtering module 600, both of which are electrically connected.

[0089] In an embodiment of the present invention, one end of the current limiting module 500 is electrically connected to the first transformer 410 and the second transformer 420, and the other end of the current limiting module 500 is electrically connected to the power output terminal 200, for limiting the transmission of reverse current at the power output terminal 200.

[0090] Reference Figure 3 In an embodiment of the present invention, the current limiting module 500 includes:

[0091] The positive terminal of the first diode is electrically connected to the second winding, and the negative terminal of the first diode is electrically connected to the power supply output terminal.

[0092] The positive terminal of the second diode is electrically connected to the fifth winding, and the negative terminal of the second diode is electrically connected to the power supply output terminal.

[0093] The positive terminal of the third diode is electrically connected to the sixth winding, and the negative terminal of the third diode is electrically connected to the power supply output terminal.

[0094] It should be noted that the first diode is Figure 3 Diode D1 in the middle, the second diode is Figure 3 Diode D2 in the middle, the third diode is Figure 3 Diode D3 in the middle.

[0095] The first diode is used to limit the reverse current transmission in the second winding and the 200 branch of the power output terminal.

[0096] The second diode is used to limit the reverse current transmission in the fifth winding and the 200 branch of the power output terminal.

[0097] The third diode is used to limit the reverse current transmission in the sixth winding and the 200 branch of the power output terminal.

[0098] In an embodiment of the present invention, the filtering module 600 is used to filter out the DC voltage and low-frequency voltage in the second energy voltage.

[0099] Reference Figure 3 In an embodiment of the present invention, the filtering module 600 includes:

[0100] The first capacitor has one end electrically connected to the power supply output terminal, and the other end grounded.

[0101] The first resistor and the first capacitor are connected in parallel.

[0102] It should be noted that the first capacitor is Figure 3 The capacitor C1 in the middle has a first resistor of Figure 3 The resistor R1 in the middle.

[0103] By connecting the first capacitor and the first resistor in parallel, the DC voltage and low-frequency voltage in the second energy voltage are filtered out.

[0104] In addition, one embodiment of the present invention discloses a high-power satellite battery discharge device, including: a high-power satellite battery discharge circuit, such as the high-power satellite battery discharge circuit in the above embodiment.

[0105] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0106] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A high-power satellite battery discharge circuit, characterized in that, include: A power input terminal, wherein the power input terminal is used to input a first energy voltage; A power output terminal, wherein the power output terminal is used to output a second energy voltage; A switching module, which is grounded, is used to receive control signals and switch the switching state according to the control signals; An energy conversion module includes a first transformer and a second transformer. The first transformer is electrically connected to the second transformer, and the first transformer and the second transformer are electrically connected to the power input terminal. The second transformer is electrically connected to the switch module. The first transformer and the second transformer convert the first energy voltage according to the switching state to output a second energy voltage to the power output terminal. The first transformer includes: A first winding and a second winding, wherein one end of the first winding is electrically connected to the power input terminal, one end of the second winding is electrically connected to the power output terminal, and the other end of the second winding is grounded; wherein, one end of the first winding and the other end of the second winding are terminals with the same name; The second transformer includes: The system comprises a third winding, a fourth winding, a fifth winding, and a sixth winding. One end of the third winding and one end of the fourth winding are electrically connected to the other end of the first winding. The other ends of the third winding and the fourth winding are electrically connected to the switching module. One end of the fifth winding and one end of the sixth winding are electrically connected to the power input terminal. The other ends of the fifth winding and the sixth winding are electrically connected to the power output terminal. Specifically, one end of the third winding and the other end of the fourth winding are terminals with the same name, and the other end of the fifth winding and one end of the sixth winding are terminals with the same name. The control signal includes: a first control signal and a second control signal, and the switching module includes: A first switching unit is electrically connected to the other end of the third winding, and the first switching unit switches the first switching state according to the first control signal. The second switching unit is electrically connected to the other end of the fourth winding, and the second switching unit switches the second switching state according to the second control signal. The high-power satellite battery discharge circuit also includes: A current limiting module, one end of which is electrically connected to the first transformer and the second transformer, and the other end of which is electrically connected to the power output terminal, is used to limit the transmission of reverse current at the power output terminal; The current limiting module includes: A first diode, the positive terminal of which is electrically connected to one end of the second winding, and the negative terminal of which is electrically connected to the power output terminal; The second diode has its positive terminal electrically connected to the other end of the fifth winding and its negative terminal electrically connected to the power output terminal. The third diode has its positive terminal electrically connected to the other end of the sixth winding, and its negative terminal electrically connected to the power output terminal.

2. The high-power satellite battery discharge circuit according to claim 1, characterized in that, The first switching unit is in an on state at a first time according to the first control signal, and in an off state at a second time and a third time according to the first control signal. The second switching unit is in a cut-off state at the first time and the second time according to the second control signal, and in a conducting state at the third time according to the second control signal.

3. The high-power satellite battery discharge circuit according to claim 1, characterized in that, Also includes: The filtering module is used to filter out the low-frequency voltage in the second energy voltage.

4. The high-power satellite battery discharge circuit according to claim 3, characterized in that, The filtering module includes: A first capacitor, one end of which is electrically connected to the power output terminal, and the other end of which is grounded. The first resistor and the first capacitor are connected in parallel.

5. A high-power satellite battery discharge device, characterized in that, include: The high-power satellite battery discharge circuit as described in any one of claims 1 to 4.

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