Multi-pump expansion circuit with phase sequence and phase acquisition and conversion functions

Abstract

The utility model relates to the technical field of multi-pump expansion circuits, in particular to a multi-pump expansion circuit with phase sequence and phase acquisition and conversion, which comprises two acquisition and conversion units, the first acquisition and conversion unit comprises an amplifier N2A, a triode V1, an optocoupler N1 and a transformer ST2, and a first terminal of the amplifier N2A is coupled with a secondary side of the transformer ST2 through resistors R6, R4 and R2; and the second acquisition and conversion unit comprises an amplifier N2B, a triode V2, an optocoupler N3 and a transformer ST1, and a first terminal of the amplifier N2B is coupled with a secondary side of the transformer ST1 through resistors R17, R15 and R13. According to the utility model, the terminal PA and the terminal PB are used for obtaining phase-shift-free pulses, accurately reflecting the characteristics of a power grid, providing power grid positive sequence, power grid negative sequence, phase loss, undervoltage information and the like, the multi-pump connection is completed through the multi-pump control unit according to the information, and the functions of connection state indication, electrical strength separation, external power supply undervoltage prevention and the like are also realized in the connection process.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of extension circuit especially relates to a multi -pump extension circuit with phase sequence phase acquisition and transformation. BACKGROUND

[0002] In the aspect of water supply engineering, there are many solutions for multi-pump controller to solve constant pressure water supply, but many such existing products have not considered the problem of large current impact caused by variable / fixed switching, which may cause great harm to the power grid and equipment, because the large current impact is generated when the power grid and motor counter electromotive force are not synchronized during motor variable / fixed switching, in order to solve the problem, the phase sequence and phase of the power grid need to be collected first to provide relevant control circuit, therefore, we provide a multi-pump extension circuit with phase sequence and phase acquisition and transformation. SUMMARY

[0003] In view of the defects of the prior art, the utility model provides a multi-pump extension circuit with phase sequence and phase acquisition and transformation to solve the problems in the prior art, in order to achieve the above purpose, the utility model is implemented by the following technical scheme.

[0004] A multi-pump extension circuit with phase sequence and phase acquisition and transformation, comprising a first acquisition and conversion unit and a second acquisition and conversion unit,

[0005] The first acquisition and conversion unit realizes pulse conversion of R and S phases, which is composed of an amplifier N2A, a triode V1, an optical coupler N1 and a transformer ST2, first, the secondary voltage is taken after isolation by the transformer ST2, limited by a bidirectional diode D2 after R2, and then sampled by R3, R4 and R5 to a comparator amplifier composed of N2A, R6 and C1, and the converted signal is connected to the 4th pin of the optical coupler N1 through R7 from the 1st pin of N2A. Secondly, the secondary voltage is taken after isolation by the transformer ST2, and a phase deficiency and voltage deficiency detection is composed of a diode D1, a voltage stabilizing diode Z10, a filter capacitor two E4 and a discharge resistor R10, and the voltage controls whether the optical coupler N1 is turned on or not through the resistor R11, and finally the converted signal is output through C3, R3, R12, V1 and C2 from the 3rd pin of the optical coupler N1 as the PA signal of the first path;

[0006] The 1st terminal of the amplifier N2A is coupled with the secondary side of the transformer ST2 through resistors R6, R4 and R2, two diodes D2 with opposite polarities are connected in series between the 1st terminal of the amplifier N2A and the resistor R2, and the 1st terminal of the amplifier N2A is coupled with the 4th terminal of the optical coupler N1 through the resistor R7;

[0007] The No. 2 terminal of the photocoupler N1 is coupled with the secondary side of the transformer ST2 via the resistance R10, the voltage stabilizing diode Z10 and the diode D1, the No. 1 terminal of the photocoupler N1 is coupled with the No. 3 terminal of the amplifier N2A via the resistance R11 and the filter capacitor two E4, and the No. 3 terminal of the photocoupler N1 is grounded via the capacitor C3;

[0008] The collector of the triode V1 is grounded via the capacitor C2, the collector of the triode V1 is externally connected with the terminal PA, and the base of the triode V1 is coupled with the No. 3 terminal of the photocoupler N1 via the resistances R12 and R3 and the capacitor C3.

[0009] The second path acquisition and conversion unit realizes pulse conversion of the S and T phases, is composed of the amplifier N2B, the triode V2, the photocoupler N3 and the transformer ST2, and first, the secondary side voltage is taken after isolation by the transformer ST1, is limited by the diode D4 after R13, is sampled by R14, R15 and R16 to the comparator amplifier composed of N2B, R17 and C4, and the converted signal is connected to the No. 4 pin of the photocoupler N3 through R18 from the No. 1 pin of N2B. Secondly, the secondary side voltage is taken after isolation by the transformer ST1, and the open-phase and under-voltage detection is composed of the diode D9, the voltage stabilizing diode Z2, the filter capacitor one E2 and the discharge resistance R22, so that the voltage controls whether the photocoupler N3 is turned on or not through the resistance R4, and finally the converted signal is outputted through C5, R19, R20, V2 and C6 as the second path PB signal.

[0010] The No. 1 terminal of the amplifier N2B is coupled with the secondary side of the transformer ST1 via the resistances R17, R15 and R13, two diodes D4 with opposite polarities are connected between the No. 3 terminal of the amplifier N2B and the resistance R13, and the No. 1 terminal of the amplifier N2B is coupled with the No. 4 terminal of the photocoupler N3 via the resistance R18.

[0011] The resistance R6 is connected between the No. 1 terminal and the No. 2 terminal of the amplifier N2A.

[0012] As a preferred technical scheme of the utility model, the resistance R5 is connected between the No. 2 terminal and the No. 3 terminal of the amplifier N2A, and the resistance R3 is arranged between the resistance R4 and the No. 3 terminal of the amplifier N2A.

[0013] As a preferred technical scheme of the utility model, the No. 3 terminal of the amplifier N2A is grounded via the capacitor C1.

[0014] As a preferred technical scheme of the utility model, the No. 2 terminal of the photocoupler N3 is coupled with the secondary side of the transformer ST1 via the resistance R22, the voltage stabilizing diode Z2 and the diode D9, the No. 1 terminal of the photocoupler N3 is coupled with the No. 3 terminal of the amplifier N2B via the resistance R4 and the filter capacitor one E2, and the No. 3 terminal of the photocoupler N3 is grounded via the capacitor C5.

[0015] As the preferred technical scheme of the utility model, the collector of the triode V2 is grounded through the capacitor C6, the collector of the triode V2 is externally connected with the terminal PB, and the base of the triode V2 is coupled with the 3rd terminal of the photocoupler N1 through the resistor R20, the resistor R19 and the capacitor C5.

[0016] As the preferred technical scheme of the utility model, the resistor R17 is connected between the 1st terminal and the 2nd terminal of the amplifier N2B.

[0017] As the preferred technical scheme of the utility model, the resistor R16 is connected between the 2nd terminal and the 3rd terminal of the amplifier N2B, and the resistor R14 is coupled between the resistor R15 and the 3rd terminal of the amplifier N2B.

[0018] As the preferred technical scheme of the utility model, the 3rd terminal of the amplifier N2B is grounded through the capacitor C4.

[0019] The utility model provides a kind of multi-pump extension circuit with phase sequence phase acquisition and transformation, with the following beneficial effects:

[0020] Terminal PA, PB obtain no phase shift pulse, accurately react power grid characteristics, provide power grid positive sequence, power grid reverse sequence, open phase, under-voltage information etc., according to these information, complete multi-pump connection by multi-pump control unit, there is also connection state indication in connection process, achieve electrical separation, provide external power supply under-voltage protection function etc. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the phase sequence acquisition and transformation schematic view of the utility model;

[0022] Figure 2 It is the multi-pump extension circuit schematic view of the utility model. DETAILED DESCRIPTION

[0023] In order to make the technical problem, technical scheme and beneficial effect to be solved by the utility model more clearly, the utility model is further described in detail in the following with the drawings and examples.It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0024] Therefore, one feature indicated in the specification will be used to explain one feature of one embodiment of the utility model, instead of suggesting that each embodiment of the utility model must have the explained feature.In addition, it should be noted that the specification describes many features.Although certain features can be combined together to show possible system design, these features can also be used in other combinations that are not explicitly explained.Thus, unless otherwise specified, the explained combination is not intended to be limited.

[0025] The principles and structures of the utility model will be explained in detail below in combination with the drawings and examples:

[0026] Reference Figure 1 、 Figure 2 A multi-pump expansion circuit with phase sequence phase acquisition and conversion, comprising a first acquisition conversion unit and a second acquisition conversion unit,

[0027] The first acquisition conversion unit realizes pulse conversion of R and S phases, and comprises an amplifier N2A, a triode V1, an optical coupler N1 and a transformer ST2. Firstly, the secondary voltage is taken after isolation by the transformer ST2, is limited by a bidirectional diode D2 after passing through R2, is sampled by R3, R4 and R5 to a comparator amplifier composed of N2A, R6 and C1, and the converted signal is connected to the 4th pin of the optical coupler N1 through R7 from the 1st pin of N2A. Secondly, the secondary voltage is taken after isolation by the transformer ST2, and a phase deficiency voltage detection is composed of a diode D1, a voltage stabilizing diode Z10, a filter capacitor two E4 and a discharge resistor R10. The voltage passes through the resistor R11 to control whether the optical coupler N1 is turned on or not, and finally the converted signal is output through C3, R3, R12, V1 and C2 to the PA signal of the first path from the 3rd pin of the optical coupler N1.

[0028] The 1st terminal of the amplifier N2A is coupled with the secondary side of the transformer ST2 through resistors R6, R4 and R2, two diodes D2 with opposite polarities are connected across the 3rd terminal of the amplifier N2A and the resistor R2, and the 1st terminal of the amplifier N2A is coupled with the 4th terminal of the optical coupler N1 through the resistor R7.

[0029] The 2nd terminal of the optical coupler N1 is coupled with the secondary side of the transformer ST2 through the resistor R10, the voltage stabilizing diode Z10 and the diode D1, the 1st terminal of the optical coupler N1 is coupled with the 3rd terminal of the amplifier N2A through the resistor R11 and the filter capacitor two E4, and the 3rd terminal of the optical coupler N1 is grounded through the capacitor C3.

[0030] The collector of the triode V1 is grounded through the capacitor C2, the collector of the triode V1 is externally connected with a terminal PA, and the base of the triode V1 is coupled with the 3rd terminal of the optical coupler N1 through the resistors R12 and R3 and the capacitor C3.

[0031] The second path acquisition conversion unit realizes pulse conversion of S and T phases, and comprises an amplifier N2B, a triode V2, an optical coupler N3 and a transformer ST2. Firstly, the secondary voltage is taken after isolation by the transformer ST1, is limited by a bidirectional diode D4 after R13, is sampled by R14, R15 and R16 to a comparator amplifier composed of N2B, R17 and C4, and the converted signal is connected to the 4th pin of the optical coupler N3 through R18 and the 1st pin of N2B. Secondly, the secondary voltage is taken after isolation by the transformer ST1, and a phase and voltage detection is realized by a diode D9, a voltage stabilizing diode Z2, a filter capacitor E2 and a discharge resistor R22. Whether the voltage is controlled by the resistor R4 to turn on the optical coupler N3 or not, and finally the converted signal is output through C5, R19, R20, V2 and C6 as the PB signal of the second path.

[0032] The 1st terminal of the amplifier N2B is coupled with the secondary side of the transformer ST1 through resistors R17, R15 and R13, two diodes D4 with opposite polarities are connected between the 3rd terminal of the amplifier N2B and the resistor R13, and the 1st terminal of the amplifier N2B is coupled with the 4th terminal of the optical coupler N3 through the resistor R18.

[0033] The resistor R6 is connected between the 1st and 2nd terminals of the amplifier N2A, the resistor R5 is connected between the 2nd and 3rd terminals of the amplifier N2A, the resistor R3 is connected between the resistor R4 and the 3rd terminal of the amplifier N2A, and the 3rd terminal of the amplifier N2A is grounded through the capacitor C1.

[0034] The 2nd terminal of the optical coupler N3 is coupled with the secondary side of the transformer ST1 through the resistor R22, the voltage stabilizing diode Z2 and the diode D9, the 1st terminal of the optical coupler N3 is coupled with the 3rd terminal of the amplifier N2B through the resistor R4 and the filter capacitor E2, the 3rd terminal of the optical coupler N3 is grounded through the capacitor C5, the collector of the triode V2 is grounded through the capacitor C6, the collector of the triode V2 is externally connected with the terminal PB, the base of the triode V2 is coupled with the 3rd terminal of the optical coupler N1 through the resistors R20 and R19 and the capacitor C5, and the resistor R14 is connected between them, the 3rd terminal of the amplifier N2B is connected with the resistor R17 across the 1st and 2nd terminals of the amplifier N2B through the capacitor C4, the resistor R16 is connected between the 2nd and 3rd terminals of the amplifier N2B, and the resistor R14 is connected between the resistor R15 and the 3rd terminal of the amplifier N2B.

[0035] The resistors R1 and R9 are connected in series between the primary sides of the transformers ST2 and ST1.

[0036] The terminals PA and PB obtain the non-phase shift pulse, accurately reflect the power grid characteristics, provide the power grid positive sequence, power grid negative sequence, open phase, under-voltage information and the like, according to the information, the multi-pump connection is completed through the multi-pump control unit, there is also a connection state indication in the connection process, the electrical strong and weak separation is achieved, and the external power supply under-voltage prevention function is provided.

[0037] The above merely illustrates the specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A multi-pump expansion circuit with phase sequence phase acquisition and conversion, comprising a first acquisition conversion unit and a second acquisition conversion unit, characterized in that the first acquisition conversion unit realizes pulse conversion of R, S phases, which is composed of an amplifier N2A, a triode V1, an optical coupler N1 and a transformer ST2; first, the secondary voltage is taken after isolation by the transformer ST2, and then is limited by a diode D2 after passing through R2, and is sampled by R3, R4 and R5 to a comparator amplifier composed of N2A, R6 and C1, and the converted signal is connected to the 4th pin of the optical coupler N1 through R7 from the 1st pin of N2A; second, the secondary voltage is taken after isolation by the transformer ST2, and then is detected by a phase deficiency voltage detection composed of a diode D1, a voltage stabilizing diode Z10, a filter capacitor two E4 and a bleeder resistor R10, and the voltage controls whether the optical coupler N1 is turned on or not through a resistor R11, and finally the converted signal is outputted through C3, R3, R12, V1 and C2 from the 3rd pin of the optical coupler N1 as the first PA signal; the 1st terminal of the amplifier N2A is coupled with the secondary side of the transformer ST2 through resistors R6, R4 and R2, two diodes D2 with opposite polarities are connected across the 3rd terminal of the amplifier N2A and the resistor R2, and the 1st terminal of the amplifier N2A is coupled with the 4th terminal of the optical coupler N1 through a resistor R7; the 2nd terminal of the optical coupler N1 is coupled with the secondary side of the transformer ST2 through a resistor R10, a voltage stabilizing diode Z10 and a diode D1, the 1st terminal of the optical coupler N1 is coupled with the 3rd terminal of the amplifier N2A through a resistor R11 and a filter capacitor two E4, and the 3rd terminal of the optical coupler N1 is grounded through a capacitor C3; the collector of the triode V1 is grounded through a capacitor C2, the collector of the triode V1 is externally connected with a terminal PA, and the base of the triode V1 is coupled with the 3rd terminal of the optical coupler N1 through resistors R12 and R3 and a capacitor C3. the resistor R6 is connected across the 1st terminal and the 2nd terminal of the amplifier N2A.

2. A multi-pump extension circuit with phase sequence acquisition and conversion as claimed in claim 1, wherein, a resistor R5 is connected across the 2nd terminal and the 3rd terminal of the amplifier N2A, and a resistor R3 is arranged between the resistor R4 and the 3rd terminal of the amplifier N2A.

3. A multi-pump extension circuit with phase sequence acquisition and conversion as claimed in claim 1, wherein, the 3rd terminal of the amplifier N2A is grounded through a capacitor C1.

4. A multi-pump extension circuit with phase sequence acquisition and conversion as claimed in claim 1, wherein, the second acquisition conversion unit realizes pulse conversion of S, T phases, which is composed of an amplifier N2B, a triode V2, an optical coupler N3 and a transformer ST2; first, the secondary voltage is taken after isolation by the transformer ST1, and then is limited by a diode D4 after passing through R13, and is sampled by R14, R15 and R16 to a comparator amplifier composed of N2B, R17 and C4, and the converted signal is connected to the 4th pin of the optical coupler N3 through R18 from the 1st pin of N2B; 5. A multi-pump extension circuit with phase sequence acquisition and conversion as claimed in claim 1, wherein, second, the secondary voltage is taken after isolation by the transformer ST1, and then is detected by a phase deficiency voltage detection composed of a diode D9, a voltage stabilizing diode Z2, a filter capacitor one E2 and a bleeder resistor R22, and the voltage controls whether the optical coupler N3 is turned on or not through a resistor R4, and finally the converted signal is outputted through C5, R19, R20, V2 and C6 from the 3rd pin of the optical coupler N3 as the second PB signal. ​ The No. 2 terminal of the photo-coupler N3 is coupled with the secondary side of the transformer ST1 via the resistance R22, the voltage stabilizing diode Z2 and the diode D9, the No. 1 terminal of the photo-coupler N3 is coupled with the No. 3 terminal of the amplifier N2B via the resistance R4 and the filter capacitor E2, and the No. 3 terminal of the photo-coupler N3 is grounded via the capacitor C5.

6. A multi-pump extension circuit with phase sequence acquisition and conversion as claimed in claim 1, wherein, The collector of the triode V2 is grounded via the capacitor C6, the collector of the triode V2 is externally connected with the terminal PB, and the base of the triode V2 is coupled with the No. 3 terminal of the photo-coupler N1 via the resistances R20 and R19 and the capacitor C5.

7. A multi-pump extension circuit with phase sequence acquisition and conversion as claimed in claim 1, wherein, The resistance R17 is connected between the No. 1 terminal and the No. 2 terminal of the amplifier N2B.

8. A multi-pump extension circuit with phase sequence acquisition and conversion as claimed in claim 1, wherein, The resistance R16 is connected between the No. 2 terminal and the No. 3 terminal of the amplifier N2B, and the resistance R15 is coupled with the resistance R14 between the No. 3 terminal of the amplifier N2B.

9. A multi-pump extension circuit with phase sequence acquisition and conversion as claimed in claim 1, wherein, The No. 3 terminal of the amplifier N2B is grounded via the capacitor C4.

10. A multi-pump extension circuit with phase sequence acquisition and conversion as claimed in claim 1, wherein, The primary side of the transformer ST2 and the primary side of the transformer ST1 are connected in series with the protection resistances R1 and R9.

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