A voltage-stabilized rectifier circuit

Abstract

The present invention relates to a voltage-stabilizing rectification circuit, which includes a filtering and protection circuit, a thyristor conduction angle control circuit, a voltage-stabilizing circuit, and a semi-controlled rectification circuit; the filtering and protection circuit, the thyristor conduction angle control circuit, the voltage-stabilizing circuit, and the semi-controlled rectification circuit are connected in sequence. By integrating the filtering and protection circuit, the thyristor conduction angle control circuit, the voltage-stabilizing circuit, and the semi-controlled rectification circuit, a voltage-stabilizing rectification circuit is obtained, which can realize the step-down of the three-phase industrial frequency voltage AC380V, i.e., the alternating current 380V, to the three-phase industrial frequency voltage AC220V, and can also rectify the three-phase industrial frequency voltage AC220V. Moreover, it has a small volume, light weight, low cost, and high integration level, can replace the three-phase industrial frequency transformer, and has strong practicability.

Description

Technical Field

[0001] The present invention relates to the technical field of voltage stabilization and rectification, and particularly to a voltage stabilization and rectification circuit. Background Art

[0002] With the steady progress of the "Made in China 2025" plan, industrial robots are being widely used and are all over the manufacturing industry. For high-power industrial robots, three-phase industrial electricity needs to be provided to ensure the normal operation of the robots. Since the operating voltage of the motors used in some robots is AC220V, that is, alternating current 220V, a relatively large three-phase power frequency transformer needs to be installed in their cabinets. Its purpose is to step down the three-phase power frequency voltage of AC380V, that is, alternating current 380V, to the three-phase power frequency voltage of AC220V to ensure that the motor operates at the rated voltage. Since it is a three-phase power frequency transformer, this determines its large volume, so it needs to occupy a large space. In addition, the cost also increases accordingly. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a voltage stabilization and rectification circuit in view of the deficiencies of the prior art.

[0004] The technical solution of a voltage stabilization and rectification circuit of the present invention is as follows:

[0005] It includes a filter protection circuit, a thyristor conduction angle control circuit, a voltage stabilization circuit, and a semi-controlled rectification circuit; the filter protection circuit, the thyristor conduction angle control circuit, the voltage stabilization circuit, and the semi-controlled rectification circuit are connected in sequence.

[0006] The beneficial effects of a voltage stabilization and rectification circuit of the present invention are as follows:

[0007] By integrating a filter protection circuit, a thyristor conduction angle control circuit, a voltage stabilization circuit, and a semi-controlled rectification circuit, a voltage stabilization and rectification circuit is obtained, which can step down the three-phase power frequency voltage of AC380V, that is, alternating current 380V, to the three-phase power frequency voltage of AC220V, and can also rectify the three-phase power frequency voltage of AC220V. Moreover, it has a small volume, light weight, low cost, high integration level, can replace the three-phase power frequency transformer, and has strong practicability.

[0008] On the basis of the above solution, a voltage stabilization and rectification circuit of the present invention can be further improved as follows.

[0009] Further, the filter protection circuit includes a first capacitor X1, a second capacitor X2, a third capacitor X3, a fourth capacitor Y4, a first varistor VR1, a second varistor VR2, a third varistor VR3, a third zener diode D3, a fourth zener diode D4, a fifth zener diode D5, a seventh zener diode D7, an eighth zener diode D8, and a ninth zener diode D9;

[0010] Among them, the fourth capacitor Y4 is connected to the PE line;

[0011] The first capacitor X1 is connected between the first phase line AC1 and the PE line,

[0012] The second capacitor X2 is connected between the second phase line AC2 and the PE line;

[0013] The third capacitor X3 is connected between the third phase line AC3 and the PE line;

[0014] The first varistor VR1 is connected between the first phase line AC1 and the second phase line AC2;

[0015] The second varistor VR2 is connected between the second phase line AC2 and the third phase line AC3;

[0016] The third varistor VR3 is connected between the first phase line AC1 and the third phase line AC3;

[0017] The fifth zener diode D5 and the ninth zener diode D9 are also connected to the first phase line AC1;

[0018] The fourth zener diode D4 and the eighth zener diode D8 are also connected to the second phase line AC2;

[0019] The third zener diode D3 and the seventh zener diode D7 are also connected to the third phase line AC3.

[0020] Furthermore, the thyristor conduction angle control circuit includes 3 thyristor conduction angle sub-control circuits, and each thyristor conduction angle sub-control circuit is respectively connected to the first phase line AC1, the second phase line AC2, and the third phase line AC3; the thyristor conduction angle sub-control circuit includes a thyristor, a zener diode, and a triode. A thyristor is connected to a zener diode, and a triode is connected in parallel between the thyristor and the zener diode.

[0021] Furthermore, the voltage stabilization circuit includes the twelfth zener diode D12, the thirteenth zener diode D13, the fourteenth zener diode D14, the fifteenth zener diode D15, and the sixth triode Q6;

[0022] The twelfth zener diode D12 is connected to the output end of the sixth triode Q6, and the twelfth zener diode D12, the thirteenth zener diode D13, the fourteenth zener diode D14, the fifteenth zener diode D15, and the sixth triode Q6 are connected in sequence.

[0023] Further, a fifth capacitor C5 is also connected between the third phase line AC3 and the second phase line AC3.

[0024] Further, an eleventh resistor R11 is also connected to the second AC2.

[0025] Further, the voltage stabilizing circuit further includes a seventeenth resistor R17, an eighteenth resistor R18, and a nineteenth resistor R19. The seventeenth resistor R17 is connected to the input end of the sixth triode Q6, and both ends of the eighteenth resistor R18 are respectively connected to the nineteenth resistor R19 and the output end of the sixth triode Q6.

[0026] An industrial robot according to the present invention includes a voltage stabilizing and rectifying circuit according to any one of the above. It has low cost, small volume, and light weight. Description of the Drawings

[0027] Figure 1 is one of the structural schematic diagrams of a voltage stabilizing and rectifying circuit according to an embodiment of the present invention;

[0028] Figure 2 is the structural schematic diagram of the filter protection circuit;

[0029] Figure 3 is the structural schematic diagram of the first thyristor conduction angle control circuit;

[0030] Figure 4 is the structural schematic diagram of the second thyristor conduction angle control circuit;

[0031] Figure 5 is the structural schematic diagram of the second thyristor conduction angle control circuit;

[0032] Figure 6 is the structural schematic diagram of the voltage stabilizing circuit;

[0033] Figure 7 is the structural schematic diagram of the semi-controlled rectifying circuit;

[0034] Figure 8 is the second structural schematic diagram of a voltage stabilizing and rectifying circuit according to an embodiment of the present invention; Detailed Embodiments

[0035] As Figure 1 shown, a voltage stabilizing and rectifying circuit according to an embodiment of the present invention includes a filter protection circuit, a thyristor conduction angle control circuit, a voltage stabilizing circuit, and a semi-controlled rectifying circuit; the filter protection circuit, the thyristor conduction angle control circuit, the voltage stabilizing circuit, and the semi-controlled rectifying circuit are connected in sequence.

[0036] By integrating a filter protection circuit, a thyristor conduction angle control circuit, a voltage stabilizing circuit, and a semi-controlled rectifier circuit, a voltage stabilizing rectifier circuit is obtained. It can step down the three-phase industrial frequency voltage AC380V (i.e., alternating current 380V) to three-phase industrial frequency voltage AC220V, and can also rectify the three-phase industrial frequency voltage AC220V. Moreover, it has a small volume, light weight, low cost, and high integration level. It can replace the three-phase industrial frequency transformer and has strong practicability.

[0037] Preferably, in the above technical solution, as Figure 2 shown, the filter protection circuit includes a first capacitor X1, a second capacitor X2, a third capacitor X3, a fourth capacitor Y4, a first varistor VR1, a second varistor VR2, a third varistor VR3, a third zener diode D3, a fourth zener diode D4, a fifth zener diode D5, a seventh zener diode D7, an eighth zener diode D8, and a ninth zener diode D9;

[0038] Among them, the fourth capacitor Y4 is connected to the pe line;

[0039] The first capacitor X1 is connected between the first phase line AC1 and the pe line,

[0040] The second capacitor X2 is connected between the second phase line AC2 and the pe line;

[0041] The third capacitor X3 is connected between the third phase line AC3 and the pe line;

[0042] The first varistor VR1 is connected between the first phase line AC1 and the second phase line AC2;

[0043] The second varistor VR2 is connected between the second phase line AC2 and the third phase line AC3;

[0044] The third varistor VR3 is connected between the first phase line AC1 and the third phase line AC3;

[0045] The fifth zener diode D5 and the ninth zener diode D9 are also connected to the first phase line AC1;

[0046] The fourth zener diode D4 and the eighth zener diode D8 are also connected to the second phase line AC2;

[0047] The third zener diode D3 and the seventh zener diode D7 are also connected to the third phase line AC3.

[0048] Among them, the first phase line AC1, the second phase line AC2, the third phase line AC3, and the pe line are the three-phase four-wire system.

[0049] Preferably, in the above technical solution, the thyristor conduction angle control circuit includes three thyristor conduction angle sub-control circuits, and each thyristor conduction angle sub-control circuit is respectively connected to the first phase line AC1, the second phase line AC2, and the third phase line AC3; the thyristor conduction angle sub-control circuit includes a thyristor, a zener diode, and a triode. A thyristor is connected to a zener diode, and a triode is connected in parallel between the thyristor and the zener diode.

[0050] Among them, the three thyristor conduction angle sub-control circuits are respectively the first thyristor conduction angle sub-control circuit, the second thyristor conduction angle sub-control circuit, and the third thyristor conduction angle sub-control circuit. Specifically:

[0051] 1) As Figure 3 shown, the first thyristor conduction angle sub-control circuit connected to the first phase line AC1 includes: a first thyristor Q1, a first zener diode D1, and a second triode Q2. The input signal is a sine signal. When the signal is input, the first thyristor Q1 and the first zener diode D1 in the control loop are turned on, and the thyristor in the semi-controlled rectifier circuit is turned on to achieve the rectification function. When the amplitude of the sine signal is greater than the preset voltage of the voltage stabilization circuit, the second triode Q2, the second zener diode D2, and the sixth triode Q6 are turned on, and the thyristor in the semi-controlled rectifier circuit is turned off, and the voltage is stabilized at the preset value. When the DC voltage is lower than the preset value, the sixth triode Q6 is turned off, and the semi-controlled rectifier circuit is turned on again. Thus, the control of the thyristor conduction angle is achieved;

[0052] 2) As Figure 4 shown, the second thyristor conduction angle sub-control circuit connected to the second phase line AC2 includes: a third thyristor Q3, a sixth zener diode D6, and a fourth triode Q4; when the signal is input, the third thyristor Q3 and the sixth zener diode D6 in the control loop are turned on, and the thyristor in the semi-controlled rectifier circuit is turned on to achieve the rectification function. When the amplitude of the sine signal is greater than the preset voltage of the voltage stabilization circuit, the fourth triode Q4, the tenth zener diode D10, and the sixth triode Q6 are turned on, and the thyristor in the semi-controlled rectifier circuit is turned off, and the voltage is stabilized at the preset value. When the DC voltage is lower than the preset value, the sixth triode Q6 is turned off, and the semi-controlled rectifier circuit is turned on again. Thus, the control of the thyristor conduction angle is achieved;

[0053] 3) As Figure 5As shown in the figure, the thyristor conduction angle control circuit connected to the second phase line AC3 includes: the fifth thyristor Q5, the eleventh zener diode D11, and the seventh triode Q4; when a signal is input, the fifth thyristor Q5 and the eleventh zener diode D11 in the control loop conduct, and the thyristor in the semi-controlled rectifier circuit conducts to achieve the rectification effect. When the amplitude of the sine signal is greater than the preset voltage of the voltage stabilizing circuit, the seventh triode Q7, the sixteenth zener diode D16, and the sixth triode Q6 conduct, and the thyristor in the semi-controlled rectifier circuit turns off, and the voltage is stabilized at the preset value. When the DC voltage is lower than the preset value, the sixth triode Q6 turns off, and the semi-controlled rectifier circuit conducts again. Thus, the control of the thyristor conduction angle is achieved;

[0054] Preferably, in the above technical solution, as Figure 6 shown in the figure, the voltage stabilizing circuit includes the twelfth zener diode D12, the thirteenth zener diode D13, the fourteenth zener diode D14, the fifteenth zener diode D15, and the sixth triode Q6;

[0055] The twelfth zener diode D12 is connected to the output end of the sixth triode Q6, and the twelfth zener diode D12, the thirteenth zener diode D13, the fourteenth zener diode D14, the fifteenth zener diode D15, and the sixth triode Q6 are connected in sequence.

[0056] As Figure 7 shown in the figure, the semi-controlled rectifier circuit is composed of three diodes and three thyristors, and the thyristor control signal in this circuit is provided by the second part. When the output voltage is higher than the preset value, the third part of the circuit works, thereby cutting off the thyristor control signal in the semi-controlled rectifier circuit, and the semi-controlled rectifier circuit stops working. When the voltage is lower than the preset value, the third part of the circuit stops working. The second part of the circuit continues to provide the thyristor control signal in the semi-controlled rectifier circuit to turn on the thyristor, so the semi-controlled rectifier circuit works normally.

[0057] Through the connection of the above four parts of the circuit, namely the filter protection circuit, the thyristor conduction angle control circuit, the voltage stabilizing circuit, and the semi-controlled rectifier circuit, the function of voltage stabilization and rectification is realized in the overall circuit control.

[0058] Preferably, in the above technical solution, a fifth capacitor C5 is also connected between the third phase line AC3 and the second phase line AC3.

[0059] Preferably, in the above technical solution, an eleventh resistor R11 is also connected to the second AC2.

[0060] Preferably, in the above technical solution, the voltage stabilizing circuit further includes a seventeenth resistor R17, an eighteenth resistor R18, and a nineteenth resistor R19. The seventeenth resistor R17 is connected to the input end of the sixth triode Q6, and both ends of the eighteenth resistor R18 are respectively connected to the nineteenth resistor R19 and the output end of the sixth triode Q6.

[0061] As Figure 8 shown, the overall structure of a voltage stabilizing and rectifying circuit according to an embodiment of the present invention is specifically:

[0062] The filter protection circuit includes a first capacitor X1, a second capacitor X2, a third capacitor X3, a fourth capacitor Y4, a first varistor VR1, a second varistor VR2, a third varistor VR3, a third zener diode D3, a fourth zener diode D4, a fifth zener diode D5, a seventh zener diode D7, an eighth zener diode D8, and a ninth zener diode D9;

[0063] Among them, the fourth capacitor Y4 is connected to the pe line;

[0064] The first capacitor X1 is connected between the first phase line AC1 and the pe line,

[0065] The second capacitor X2 is connected between the second phase line AC2 and the pe line;

[0066] The third capacitor X3 is connected between the third phase line AC3 and the pe line;

[0067] The first varistor VR1 is connected between the first phase line AC1 and the second phase line AC2;

[0068] The second varistor VR2 is connected between the second phase line AC2 and the third phase line AC3;

[0069] The third varistor VR3 is connected between the first phase line AC1 and the third phase line AC3;

[0070] The fifth zener diode D5 and the ninth zener diode D9 are further connected to the first phase line AC1;

[0071] The fourth zener diode D4 and the eighth zener diode D8 are further connected to the second phase line AC2;

[0072] The third zener diode D3 and the seventh zener diode D7 are further connected to the third phase line AC3.

[0073] The thyristor conduction angle control circuit includes three thyristor conduction angle sub-control circuits, and each thyristor conduction angle sub-control circuit is respectively connected to the first phase line AC1, the second phase line AC2, and the third phase line AC3; the thyristor conduction angle sub-control circuit includes a thyristor, a zener diode, and a triode. A thyristor is connected to a zener diode, and a triode is connected in parallel between the thyristor and the zener diode.

[0074] The voltage stabilizing circuit includes a twelfth zener diode D12, a thirteenth zener diode D13, a fourteenth zener diode D14, a fifteenth zener diode D15, and a sixth triode Q6;

[0075] The twelfth zener diode D12 is connected to the output end of the sixth triode Q6, and the twelfth zener diode D12, the thirteenth zener diode D13, the fourteenth zener diode D14, the fifteenth zener diode D15, and the sixth triode Q6 are connected in sequence.

[0076] A fifth capacitor C5 is also connected between the third phase line AC3 and the second phase line AC3.

[0077] An eleventh resistor R11 is also connected to the second AC2.

[0078] The voltage stabilizing circuit further includes a seventeenth resistor R17, an eighteenth resistor R18, and a nineteenth resistor R19. The seventeenth resistor R17 is connected to the input end of the sixth triode Q6, and both ends of the eighteenth resistor R18 are respectively connected to the nineteenth resistor R19 and the output end of the sixth triode Q6.

[0079] An industrial robot according to the present invention includes a voltage stabilizing and rectifying circuit according to any one of the above. It has low cost, small volume, and light weight. On the concept of optimizing and improving the robot, a voltage stabilizing and rectifying circuit that replaces a three-phase power frequency transformer, that is, a voltage stabilizing and rectifying circuit of the present application, has practical research significance in actual production.

[0080] In the present invention, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0081] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0082] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A voltage-stabilizing rectifying circuit, characterized in that, It includes a filter protection circuit, a thyristor conduction angle control circuit, a voltage stabilization circuit, and a semi-controlled rectification circuit; the filter protection circuit, the thyristor conduction angle control circuit, the voltage stabilization circuit, and the semi-controlled rectification circuit are connected in sequence; The filter protection circuit includes a first capacitor X1, a second capacitor X2, a third capacitor X3, a fourth capacitor Y4, a first varistor VR1, a second varistor VR2, a third varistor VR3, a third zener diode D3, a fourth zener diode D4, a fifth zener diode D5, a seventh zener diode D7, an eighth zener diode D8, and a ninth zener diode D9; Among them, the fourth capacitor Y4 is connected to the pe line; The first capacitor X1 is connected between the first phase line AC1 and the pe line, The second capacitor X2 is connected between the second phase line AC2 and the pe line; The third capacitor X3 is connected between the third phase line AC3 and the pe line; The first varistor VR1 is connected between the first phase line AC1 and the second phase line AC2; The second varistor VR2 is connected between the second phase line AC2 and the third phase line AC3; The third varistor VR3 is connected between the first phase line AC1 and the third phase line AC3; The fifth zener diode D5 and the ninth zener diode D9 are also connected to the first phase line AC1; The fourth zener diode D4 and the eighth zener diode D8 are also connected to the second phase line AC2; The third zener diode D3 and the seventh zener diode D7 are also connected to the third phase line AC3; The thyristor conduction angle control circuit includes 3 thyristor conduction angle sub-control circuits, and each thyristor conduction angle sub-control circuit is respectively connected to the first phase line AC1, the second phase line AC2, and the third phase line AC3; the thyristor conduction angle sub-control circuit includes a thyristor, a zener diode, and a triode, a thyristor is connected to a zener diode, and a triode is connected in parallel between the thyristor and the zener diode; The voltage stabilization circuit includes a twelfth zener diode D12, a thirteenth zener diode D13, a fourteenth zener diode D14, a fifteenth zener diode D15, and a sixth triode Q6; The first thyristor conduction angle sub-control circuit connected to the first phase line AC1 includes: a first thyristor Q1, a first zener diode D1, and a second triode Q2. The input signal is a sine signal. When the signal is input, the first thyristor Q1 and the first zener diode D1 in the control loop are turned on, and the thyristor in the semi-controlled rectification circuit is turned on to achieve the rectification function. When the amplitude of the sine signal is greater than the preset voltage of the voltage stabilization circuit, the second triode Q2, the second zener diode D2, and the sixth triode Q6 are turned on, and the thyristor in the semi-controlled rectification circuit is turned off, and the voltage is stabilized at the preset value. When the DC voltage is lower than the preset value, the sixth triode Q6 is turned off, and the semi-controlled rectification circuit is turned on again; The control circuit for the conduction angle of the second thyristor connected to the second phase line AC2 includes: a third thyristor Q3, a sixth zener diode D6, and a fourth triode Q4; when a signal is input, the third thyristor Q3 and the sixth zener diode D6 in the control loop conduct, and the thyristor in the semi-controlled rectifier circuit conducts to achieve the rectification function. When the amplitude of the sine signal is greater than the preset voltage of the voltage stabilizing circuit, the fourth triode Q4, the tenth zener diode D10, and the sixth triode Q6 conduct, and the thyristor in the semi-controlled rectifier circuit is turned off, and the voltage is stabilized at the preset value. When the DC voltage is lower than the preset value, the sixth triode Q6 is turned off, and the semi-controlled rectifier circuit conducts again; The control circuit for the conduction angle of the second thyristor connected to the third phase line AC3 includes: a fifth thyristor Q5, an eleventh zener diode D11, and a seventh triode Q7; when a signal is input, the fifth thyristor Q5 and the eleventh zener diode D11 in the control loop conduct, and the thyristor in the semi-controlled rectifier circuit conducts to achieve the rectification function. When the amplitude of the sine signal is greater than the preset voltage of the voltage stabilizing circuit, the seventh triode Q7, the sixteenth zener diode D16, and the sixth triode Q6 conduct, and the thyristor in the semi-controlled rectifier circuit is turned off, and the voltage is stabilized at the preset value. When the DC voltage is lower than the preset value, the sixth triode Q6 is turned off, and the semi-controlled rectifier circuit conducts again; The twelfth zener diode D12 is connected to the output end of the sixth triode Q6, and the twelfth zener diode D12, the thirteenth zener diode D13, the fourteenth zener diode D14, the fifteenth zener diode D15, and the sixth triode Q6 are connected in sequence.

2. The regulated rectifier circuit according to claim 1, wherein A fifth capacitor C5 is also connected between the third phase line AC3 and the second phase line AC3.

3. The regulated rectifier circuit according to claim 2, wherein An eleventh resistor R11 is also connected to the second phase line AC2.

4. A voltage stabilizing rectifying circuit according to claim 1, characterized in that, The voltage stabilizing circuit further includes a seventeenth resistor R17, an eighteenth resistor R18, and a nineteenth resistor R19. The seventeenth resistor R17 is connected to the input end of the sixth triode Q6, and both ends of the eighteenth resistor R18 are respectively connected to the nineteenth resistor R19 and the output end of the sixth triode Q6.

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