Non-isolated high-voltage power supply device with low power consumption and low ripple

Abstract

The invention belongs to the technical field of particle detection, and relates to a low-power-consumption low-ripple non-isolated high-voltage power supply device, which is used for a space energy particle detector and comprises an oscillation boosting module and a rectification filtering module, the input is + 12V, the output comprises a first voltage value and a second voltage value, and the two output voltage values are adjustable according to the size of an external voltage-regulator tube and are both positive high voltages; the oscillation boosting module comprises a push-pull circuit and a transformer coil and is used for generating sine wave alternating current; and the rectifying and filtering module comprises a full-bridge rectifying circuit and a subsequent RC (Resistance-Capacitance) filtering circuit and is used for converting alternating current into direct current. According to the invention, miniaturization and light weight of the high-voltage power supply device are realized; the circuit has the advantages of low power consumption, small ripple, wide working temperature range, high radiation resistance and high stability, and is suitable for aerospace equipment. The output is adjusted only by replacing an external voltage-stabilizing tube; by adopting the device for integrated processing, modularization and simplification of an electronic part of a detection instrument can be realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of particle detection, and in particular relates to a low-power consumption and low-ripple non-isolated high-voltage power supply device. Background Art

[0002] In the field of space particle detection, the application of high-voltage power supply is indispensable. Its main function is to provide bias voltage for the sensor system of the detection instrument, so that the electron-hole pairs generated when particles enter the semiconductor sensor move to form an electrical signal.

[0003] When the detector is working, the output of the high-voltage power supply needs to be stable within a suitable range. If the output is too low, the sensor may not be exhausted, thus affecting the accuracy of the detection; if the output is too high, the sensor may be damaged. In addition, if the ripple of the high-voltage power supply output is too high, there will be a lot of noise in the electrical signal generated by the sensor, causing the smaller particle signal to be submerged, so that the lower limit of the energy detected cannot meet the expected indicators. Therefore, the output stability and ripple size of the high-voltage power supply largely determine the working state of the sensor system, which in turn affects the working performance of the entire detection instrument.

[0004] In addition, for aerospace devices, their size and weight are also factors that cannot be ignored. In the energy particle detection instruments of Fengyun, navigation, Chang'e, space station and other missions, the high-voltage power supply module is composed of a series of discrete devices. This design not only takes up a lot of circuit board space and instrument weight, but also the complex peripheral circuit will lead to a decrease in the overall reliability of the module.

[0005] Therefore, under the condition of ensuring high stability and low ripple of high-voltage power supply output, it is urgently necessary to achieve its miniaturization, lightweight and simplification, which has positive significance for space exploration. Summary of the invention

[0006] The purpose of the present invention is to overcome the defects of the prior art and to provide a non-isolated high-voltage power supply device with low power consumption and low ripple.

[0007] In order to achieve the above-mentioned object, the present invention provides a low-power, low-ripple, non-isolated high-voltage power supply device for a space energy particle detector, the device comprising: an oscillation boost module and a rectifier filter module; the input is +12V, the output comprises a first voltage value and a second voltage value, the two output voltage values ​​are adjustable according to an external voltage regulator tube, and both are positive high voltage; wherein,

[0008] The oscillation boost module includes a push-pull circuit and a transformer coil, which are used to generate sinusoidal alternating current;

[0009] The rectification and filtering module includes a full-bridge rectification circuit and a subsequent RC filtering circuit, which is used to convert alternating current into direct current.

[0010] Preferably, the push-pull circuit is composed of two NPN switching transistors Q1 and Q2.

[0011] Preferably, the transformer coil T includes 10 output terminals, namely output terminals 1-10, wherein (1, 2) and (2, 3) are two groups of primary coils, (4, 5) and (5, 6) are two groups of feedback coils, and (7, 8) and (9, 10) are two groups of secondary coils.

[0012] Preferably, the primary coil and the feedback coil of the transformer coil T are both wound in parallel with two wires, and the turns ratio meets the set range.

[0013] Preferably, the base of Q1 is connected to the output terminal 4 of the transformer coil T, the collector is connected to the output terminal 1 of the transformer coil T, and the emitter is grounded; the base of Q2 is connected to the output terminal 6 of the transformer coil T, the collector is connected to the output terminal 3 of the transformer coil T, and the emitter is grounded.

[0014] Preferably, the oscillation boost module also includes a chip resistor R6 and three chip capacitors C1, C6 and C10, wherein R6 is connected between the output terminals 2 and 5 of the transformer coil T, C1 is connected between the collector and emitter of Q1, C6 is connected between the collector and emitter of Q2, and C10 is connected between the output terminal 5 of the transformer coil T and ground.

[0015] Preferably, the full-bridge rectifier circuit includes two groups, the first group is composed of four rectifier diodes D1-D4, and the second group is composed of four rectifier diodes D5-D8. The input end of the first group of full-bridge rectifier circuits is connected to the output terminals 9 and 10 of the transformer coil T, and the input end of the second group of full-bridge rectifier circuits is connected to the output terminals 7 and 8 of the transformer coil T.

[0016] Preferably, each group of the full-bridge rectifier circuits is connected to an RC filter circuit, wherein the output end of the first group of full-bridge rectifier circuits is connected in parallel with polyester capacitors C2 and C3, and a metal film resistor R1 is connected between C2 and C3; the output end of the second group of full-bridge rectifier circuits is connected in parallel with polyester capacitors C7 and C8, and a metal film resistor R3 is connected between C7 and C8.

[0017] Preferably, the device also includes voltage regulator tubes D9 and D10, and external filter capacitors C4 and C9, wherein D9 and C4 are connected in parallel with C3, and D10, C9 and C8 are connected in parallel, the negative pole of D9 is connected to the first output terminal HV1, and the positive pole is grounded; the negative pole of D10 is connected to the second output terminal HV2, and the positive pole is grounded; the output values ​​of HV1 and HV2 are determined by D9 and D10 respectively, and the resistor R2 and the capacitor C5 are directly connected at the +12V input terminal and the ground.

[0018] Preferably, the device is enclosed in a metal housing.

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] 1. The present invention realizes the miniaturization and lightness of the high-voltage module through the integrated process, and can optimize the total weight of the detection instrument;

[0021] 2. The present invention has low power consumption, small ripple, wide operating temperature range, strong radiation resistance, high stability, and can optimize the detection performance of the detector, and is suitable for aerospace equipment;

[0022] 3. The present invention simplifies the peripheral circuit of the module, and only the external voltage regulator tube needs to be replaced to adjust the output;

[0023] 4. The integrated processing of the present invention can realize the modularization and simplification of the electronic part of the detection instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of a circuit structure of a low-power, low-ripple, non-isolated high-voltage power supply device of the present invention;

[0025] Figure 2 is the output of the first voltage output terminal HV1 and the ripple;

[0026] Figure 3 The second voltage output terminal HV2 outputs the ripple. DETAILED DESCRIPTION

[0027] The present invention integrates the traditional high-voltage circuit and optimizes and lightens the performance of the detection instrument by miniaturizing, lightening and simplifying the circuit.

[0028] The present invention integrates the traditional high-voltage circuit and integrates most of the peripheral circuit components into the metal package. Its characteristics are:

[0029] ①Dual output, high voltage stability and small ripple;

[0030] ②The device has low power consumption, light weight and small size;

[0031] ③Wide operating temperature range and high radiation resistance index;

[0032] ④External voltage regulator, flexible output voltage adjustment;

[0033] All internal integrations are domestically made components, and there are no import restrictions.

[0034] 1. Product index description

[0035] Table 1 Summary of technical indicators of high voltage power supply device

[0036]

[0037]

[0038] Table 1 * : Two output voltages are adjustable, and the output size is determined by an external voltage regulator; 2 * : Measurement results with voltage regulator.

[0039] 2. Internal circuit

[0040] The device of the present invention is packaged in a metal shell and has 8 pins. The pin definitions are shown in Table 2.

[0041] Table 2. Pin Definition

[0042] Pinout name Function Pinout name Function 1 +12V Input voltage 5 HV2 Second voltage output 2 Cex1 External filter capacitor terminal 6 GND land 3 GND land 7 GND land 4 GND land 8 HV1 First voltage output

[0043] The circuit structure of the present invention is as follows Figure 1 As shown. According to the function, it can be divided into two parts: an oscillation boost module composed of two switching tubes and a transformer, and a rectifier filter module composed of a bridge rectifier diode, a filter capacitor, and a resistor. 1-10 of the transformer represent different output terminals of the coil. Among them: (1, 2), (2, 3) are two sets of primary coils. (4, 5), (5, 6) are two sets of feedback coils. (7, 8), (9, 10) are two sets of secondary coils.

[0044] Among them, the oscillation boost module is mainly composed of two NPN switching transistors and a transformer coil. The two transistors form a push-pull circuit, which generates oscillation by switching back and forth between on / off, so that an AC power close to a sine wave is generated on the secondary coil of the transformer. The rectifier and filter module includes a full-bridge rectifier circuit composed of four rectifier diodes and a subsequent RC filter circuit, which can convert AC power into a relatively smooth DC power. In practical applications, the final output voltage can be adjusted by selecting appropriate external voltage regulator tubes D9 and D10.

[0045] 3. Circuit working principle

[0046] When the device is powered on, capacitor C10 is charged, and the base voltages of Q1 and Q2 gradually increase. Since the performances of Q1 and Q2 cannot be completely consistent, one of them must be turned on first (taking Q1 as an example).

[0047] As the transistor is turned on, current is generated from nothing in the primary coil. 2 positive and 1 negative induced voltages are generated on the primary coil, 4 positive and 5 negative induced voltages are generated on the feedback coil, and the base voltage of Q1 increases, causing the current flowing through the primary coil to increase further. The induced voltages on the primary coil and the feedback coil do not change in direction and continue to increase, forming positive feedback 1.

[0048] As Q1 tends to saturation, the growth rate of the current on the primary coil slows down, and the induced voltage on the primary coil and the feedback coil decreases, causing the base voltage of Q1 to drop. The current flowing through the primary coil decreases, generating an induced voltage of 2 negative and 1 positive, and an induced voltage of 5 positive and 4 negative on the feedback coil. The base voltage of Q1 decreases further, forming positive feedback 2 until the transistor is cut off.

[0049] When Q1 is in positive feedback 2, the direction of the induced voltage generated on the feedback coil 56 is 5 negative and 6 positive, the base voltage of Q2 rises, and Q2 enters positive feedback 1; when Q2 enters positive feedback 2, Q1 enters positive feedback 1 again. The two transistors alternately switch between positive feedback 1 and 2 states, generating a relatively stable AC voltage that is approximately a sine wave on the secondary coil. By selecting the appropriate number of coil turns, oscillation boosting can be achieved, and a smooth DC high voltage output can be obtained through the subsequent full-bridge rectification and RC filtering circuit.

[0050] 4. Technical solution

[0051] The key components of the oscillation boost module are two transistors and a transformer.

[0052] In one embodiment, the transistor selected is a high-frequency low-power switch 3DK104D, which has a smaller tube voltage drop and a higher collector maximum current and can meet the first-level derating requirement.

[0053] The primary coil and feedback coil of the transformer are both wound in parallel with two wires. It is important to note the turns ratio between the primary coil and the feedback coil. If the turns ratio is too high, the induced voltage on the feedback coil will be too high, causing the transistor to shut down prematurely, resulting in reduced output capacity and the risk of burning out. On the contrary, if the turns ratio is too low, the transistor will not be able to shut down in time, increasing switching losses and reducing efficiency. At the same time, if the induced voltage is too low, the coil may not be able to start oscillation.

[0054] The main components of the rectifier filter module are rectifier diodes. It is important to note the forward / reverse voltage drop and withstand voltage of the device. In the test, appropriate voltage regulators were selected at D9 and D10 to stabilize the output voltage at around 107V and 220V respectively. It should be noted that these two voltage values ​​are only examples. The voltage value can be adjusted by adjusting the external voltage regulators D9 and D10. Figure 2 , Figure 3 As shown, the blue line is the ripple and the red line is the output voltage. C4 and C9 are external filter capacitors used to reduce the ripple of the output voltage. According to actual measurements, the filtering effect is best when the capacitance is 0.2μf, and the ripple is about 15mV.

[0055] The technical solution of the present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0056] Example

[0057] The embodiment of the present invention provides a low-power, low-ripple, non-isolated high-voltage power supply device. For use in space energy particle detectors, the device includes: an oscillation boost module and a rectifier filter module; the input is +12V, and the output includes a first voltage value and a second voltage value. The two output voltage values ​​are adjustable according to an external voltage regulator tube; wherein,

[0058] 1. Oscillating boost module:

[0059] It includes a push-pull circuit and a transformer coil for generating sinusoidal alternating current;

[0060] Oscillator boost module electronics implementation:

[0061] Table 3 List of main electronic components of oscillation boost module

[0062] Serial number Component name Specifications Position No. quantity 1 triode 3DK104D Q1,Q2 2 2 Chip resistors 50KΩ R6 1 3 Chip Capacitors 1nf C1,C6,C10 3 4 transformer / T1 1

[0063] 2. Rectification and filtering module:

[0064] It includes a full-bridge rectifier circuit and a subsequent RC filter circuit, which are used to convert alternating current into direct current.

[0065] Rectification and filtering module electronics implementation:

[0066] Table 4 List of main electronic components of rectifier and filter module

[0067] Serial number Component name Specifications Position No. quantity 1 Rectifier diode HRS3040 D1-D8 8 2 Voltage regulator BWC D9,D10 2 3 Polyester capacitors 1nf / 400V C2,C3,C7,C8 4 4 Polyester capacitors 200nf / 400V C4,C9 2 5 Metal Film Resistors 500KΩ R1,R3 2

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that any modification or equivalent replacement of the technical solutions of the present invention does not depart from the spirit and scope of the technical solutions of the present invention and should be included in the scope of the claims of the present invention.

Claims

1. A low-power, low-ripple, non-isolated high-voltage power supply device for a space energy particle detector, characterized in that: The device comprises: an oscillation boost module and a rectifier filter module; the input is +12V, and the output includes a first voltage value and a second voltage value. The two output voltage values ​​are adjustable according to an external voltage regulator tube, and both are positive high voltages; wherein, The oscillation boost module includes a push-pull circuit and a transformer coil, which are used to generate sinusoidal alternating current; The rectification and filtering module includes a full-bridge rectification circuit and a subsequent RC filtering circuit, which is used to convert alternating current into direct current.

2. The low-power, low-ripple, non-isolated high-voltage power supply device according to claim 1, characterized in that: The push-pull circuit is composed of two NPN type switching transistors Q1 and Q2.

3. The low-power, low-ripple, non-isolated high-voltage power supply device according to claim 2, characterized in that: The transformer coil T includes 10 output terminals, namely output terminals 1-10, wherein (1, 2) and (2, 3) are two groups of primary coils, (4, 5) and (5, 6) are two groups of feedback coils, and (7, 8) and (9, 10) are two groups of secondary coils.

4. The low-power, low-ripple, non-isolated high-voltage power supply device according to claim 3, characterized in that: The primary coil and the feedback coil of the transformer coil T are both wound in parallel with two wires, and the turns ratio meets the set range.

5. The low-power, low-ripple, non-isolated high-voltage power supply device according to claim 3, characterized in that: The base of Q1 is connected to the output terminal 4 of the transformer coil T, the collector is connected to the output terminal 1 of the transformer coil T, and the emitter is grounded; the base of Q2 is connected to the output terminal 6 of the transformer coil T, the collector is connected to the output terminal 3 of the transformer coil T, and the emitter is grounded.

6. The low-power, low-ripple, non-isolated high-voltage power supply device according to claim 3, characterized in that: The oscillation boost module also includes a chip resistor R6 and three chip capacitors C1, C6 and C10, wherein R6 is connected between the output terminals 2 and 5 of the transformer coil T, C1 is connected between the collector and emitter of Q1, C6 is connected between the collector and emitter of Q2, and C10 is connected between the output terminal 5 of the transformer coil T and ground.

7. The low-power, low-ripple, non-isolated high-voltage power supply device according to claim 5, characterized in that: The full-bridge rectifier circuit includes two groups, the first group is composed of four rectifier diodes D1-D4, and the second group is composed of four rectifier diodes D5-D8. The input end of the first group of full-bridge rectifier circuits is connected to the output terminals 9 and 10 of the transformer coil T, and the input end of the second group of full-bridge rectifier circuits is connected to the output terminals 7 and 8 of the transformer coil T.

8. The low-power, low-ripple, non-isolated high-voltage power supply device according to claim 7, characterized in that: Each group of full-bridge rectifier circuits is connected to an RC filter circuit, wherein the output end of the first group of full-bridge rectifier circuits is connected in parallel with polyester capacitors C2 and C3, and a metal film resistor R1 is connected between C2 and C3; the output end of the second group of full-bridge rectifier circuits is connected in parallel with polyester capacitors C7 and C8, and a metal film resistor R3 is connected between C7 and C78.

9. The low-power, low-ripple, non-isolated high-voltage power supply device according to claim 8, characterized in that: The device also includes voltage regulator tubes D9 and D10, and external filter capacitors C4 and C9, wherein D9 and C4 are connected in parallel with C3, and D10, C9 and C8 are connected in parallel, the negative electrode of D9 is connected to the first output terminal HV1, and the positive electrode is grounded; the negative electrode of D10 is connected to the second output terminal HV2, and the positive electrode is grounded; the output values ​​of HV1 and HV2 are determined by D9 and D10 respectively, and the resistor R2 and the capacitor C5 are directly connected to the +12V input terminal and the ground.

10. The low-power, low-ripple, non-isolated high-voltage power supply device according to claim 1, characterized in that: The device is enclosed in a metal housing.

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