Self-electricity-taking mutual inductor circuit

Abstract

The utility model relates to the technical field of mutual inductors, in particular to a self-electricity-taking mutual inductor circuit. The self-electricity-taking mutual inductor circuit comprises an iron core, the iron core is provided with a signal acquisition module and an electricity taking module, the signal acquisition module comprises a first coil L1 wound around the iron core, the first coil L1 is provided with an acquisition unit, the acquisition unit comprises a resistor R2 connected to the two ends of the first coil L1 in parallel, and the two ends of the resistor R2 are provided with two output ends. A capacitor C5 and a capacitor C6 are sequentially connected between the two output ends, the capacitor C5 and the capacitor C6 are grounded, the power taking module comprises a second coil L2 wound on the iron core, and the second coil L2 is sequentially connected with a rectifying and filtering unit and a voltage stabilizing unit. According to the utility model, the electricity taking module is arranged, so that the normal work of the mutual inductor can be realized without an external power supply and a battery, the working stability of the mutual inductor is better improved, and the subsequent maintenance cost of the mutual inductor is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of mutual inductor, concretely relates to a self -power mutual inductor circuit. BACKGROUND

[0002] In modern power systems, mutual inductors are widely used in current, voltage and power measurement as an important electrical measuring device. Traditional mutual inductors are mainly used for signal acquisition, which converts high-speed changing electromagnetic signals into low-voltage signals suitable for instrument measurement, thereby realizing the monitoring and analysis of the state of the power system. Although traditional mutual inductors have certain advantages in measurement accuracy and stability, their design defects gradually emerge, especially in signal processing and power supply.

[0003] The mutual inductor in the prior art mainly relies on external power supply and cannot self-power. This limits the layout of the mutual inductor in some remote monitoring, dispersed sensor networks, and requires additional power supply lines or battery installation, increasing the configuration complexity of the device and the cost of later maintenance. In addition, since the mutual inductor itself cannot be powered, its signal monitoring capability will also be affected in the case of power grid failure or battery under-voltage, and effective state monitoring cannot be performed.

[0004] Therefore, there is an urgent need for a mutual inductor circuit design that can self-power to improve its flexibility and applicability. CONTENT OF THE UTILITY MODEL

[0005] The utility model provides a kind of self-power mutual inductor circuit, it can overcome certain or some defects of prior art.

[0006] According to the self-power mutual inductor circuit of the utility model, it includes core, signal acquisition module and power module are arranged at the core, signal acquisition module includes the first coil L1 wound at the core, acquisition unit is arranged at the first coil L1, the acquisition unit includes the resistance R2 connected in parallel at the two ends of the first coil L1, 2 output ends are arranged at the two ends of the resistance R2, the capacitor C5 and the capacitor C6 are sequentially connected between the 2 output ends, the capacitor C5 and the capacitor C6 are grounded, the power module includes the second coil L2 wound at the core, rectifier filter unit and voltage stabilizing unit are sequentially connected at the second coil L2.

[0007] As preferred, the rectifier filter unit includes transient suppression diode D1 connected in parallel at the two ends of the second coil L2, the first node and the second node are formed at the two ends of the transient suppression diode D1.

[0008] As preferred, the rectifier filter unit further includes capacitor C1 arranged in parallel at the second coil L2, the third node and the fourth node are formed at the two ends of the capacitor C1, the capacitor C9 and diode D2 are sequentially arranged in series between the first node and the third node.

[0009] As preferred, a fifth node is formed between the first node and the capacitor C9, and the capacitor C12, the diode D3 and the capacitor C8 are connected in sequence between the fifth node and the fourth node.

[0010] As preferred, a sixth node is formed between the capacitor C8 and the diode D3, and the diode D6 and the capacitor C2 are connected between the sixth node and the third node.

[0011] As preferred, the voltage stabilizing unit comprises a voltage stabilizing diode D4 connected in parallel across the capacitor C2, and the super capacitor SUPER C1 is connected in parallel across the voltage stabilizing diode D4.

[0012] As preferred, the super capacitor SUPER C1 is connected in parallel across the voltage stabilizing diode D4.

[0013] As preferred, the resistor R3 is connected between the resistor R2 and the capacitor C5, and the resistor R4 is connected between the resistor R2 and the capacitor C6.

[0014] Beneficial effects:

[0015] The utility model discloses a power taking module is set up, thereby without external power supply and battery, can realize the normal work of mutual inductor, thereby preferably improve the stability of mutual inductor work, and reduce the subsequent maintenance cost of mutual inductor.

[0016] Further, the filter rectifying unit and the voltage stabilizing unit can perform multi-stage filter rectification on the alternating current signal at the second coil L2, and store energy through the super capacitor SUPER C1, so that the power taking module can preferably output constant voltage, so that the load circuit of mutual inductor can continuously and stably operate. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a self-powered mutual inductor circuit diagram. DETAILED DESCRIPTION

[0018] In order to further understand the content of the utility model, the utility model is described in detail in combination with examples. It should be understood that the examples are only used to explain the utility model and not to limit it.

[0019] As shown in Figure 1 , the embodiment provides a self-powered mutual inductor circuit, which comprises a core, a signal acquisition module and a power taking module are arranged at the core, the signal acquisition module is used for acquiring power consumption signals for subsequent analysis and calculation, and the power taking module is used for power taking for the use of the mutual inductor.

[0020] The signal acquisition module comprises a first coil L1 wound around an iron core, the iron core is sleeved on the cable, the first coil L1 is wound around the iron core, when the current in the cable changes, the first coil L1 generates an induced electromotive force in the inside, the first coil L1 is provided with an acquisition unit, the acquisition unit comprises a resistor R2 connected in parallel across the first coil L1, the resistor R2 provides a load for the first coil L1, so that the induced current generated by induction can be effectively extracted, two output ends are arranged at the resistor R2, the output ends are used for connecting subsequent circuits or devices for data reading and processing, the two output ends are sequentially connected with a capacitor C5 and a capacitor C6, the capacitor C5 and the capacitor C6 can perform signal filtering and shaping, so as to smooth the high-frequency noise in the circuit, the capacitor C5 and the capacitor C6 are grounded, so as to provide a reference ground for the signal, improve the stability of the measurement, and further enhance the signal-to-noise ratio of the signal.

[0021] Further, the resistor R2 and the capacitor C5 are connected with a resistor R3, the resistor R2 and the capacitor C6 are connected with a resistor R4, the resistor R2 can adjust the signal amplitude, and adapt the signal to the voltage level required by subsequent processing, in addition, the resistor R2 can also assist in setting the time constant of the signal.

[0022] In the embodiment, the power taking module comprises a second coil L2 wound around an iron core, the second coil L2 is sequentially connected with a rectifier filter unit and a voltage stabilizing unit. When there is current in the cable, an induced voltage is generated at the second coil L2, the induced voltage is usually an alternating current signal, and the rectifier filter unit can convert the alternating current signal into a direct current output.

[0023] The alternating current signal is subjected to smoothing filtering processing by the rectifier filter unit, so that the alternating current signal becomes a usable direct current voltage signal, and the direct current voltage signal is further stabilized by the voltage stabilizing unit, so as to ensure the constancy of the output voltage.

[0024] Specifically, the rectifier filter unit comprises a transient suppression diode D1 connected in parallel across the second coil L2, the transient suppression diode D1 forms a first node 1 and a second node 2 across the two ends, the second coil is connected in parallel with a capacitor C1, the capacitor C1 forms a third node 3 and a fourth node 4 across the two ends, the capacitor C9 and the diode D2 are sequentially connected in series between the first node 1 and the third node 3, the fifth node 5 is formed between the first node 1 and the capacitor C9, the capacitor C12, the diode D3 and the capacitor C8 are sequentially connected between the fifth node 5 and the fourth node 4, the capacitor C8 and the diode D3 form a sixth node 6, and the diode D6 and the capacitor C2 are connected between the sixth node 6 and the third node 3.

[0025] The alternating voltage generated by the second coil L2 is rectified by the diodes D2 and D3 connected in series, and the diodes D2 and D3 allow current to flow in only one direction, thereby converting the alternating voltage into a unidirectional pulsating voltage. At this time, one end of the diode D2 forms a third node 3 (positive after rectification) and a second node 2 (negative after rectification).

[0026] The capacitor C1 connected in parallel with the second coil is used to smooth the pulsating voltage after rectification, reduce fluctuations, and perform preliminary energy storage and filtering. The capacitor C9 connected in series between the first node 1 and the third node 3 further processes high-frequency harmonic pulsating voltage, and the diode D6 further rectifies to allow current to flow in only one direction.

[0027] The capacitor C12, diode D3, and capacitor C8 connected in sequence between the fifth node 5 and the fourth node 4 form a further filtering circuit. The capacitor C12 first smooths the high-frequency harmonics of the signal, and then the signal is rectified by the diode D3 and enters the capacitor C8 for energy storage and filtering. The capacitor C8 can reduce fluctuations in the output voltage and form a more stable DC output.

[0028] The connection between the sixth node 6 and the third node 3 is further smoothed and rectified by the capacitor C2 and the diode D6 to ensure that the final output voltage is stable and within the range of suitable application DC voltage. The capacitor C2 plays a role in the last energy storage and filtering to ensure the smoothness of the output voltage.

[0029] The rectification and filtering unit can effectively convert alternating signals into stable DC voltage through multiple stages of rectification and filtering. Each step of rectification and filtering reduces fluctuations and noise in the signal, outputting a more stable voltage to better meet the needs of the electrical unit in the transformer.

[0030] In this embodiment, the voltage stabilizing unit includes a voltage stabilizing diode D4 connected in parallel across the capacitor C2. A super capacitor SUPER C1 is connected in parallel across the voltage stabilizing diode D4. The positive end of the super capacitor SUPER C1 forms a power supply end, and the diode D5 is connected to the power supply end.

[0031] Specifically, the voltage stabilizing diode D4 is used to ensure that the voltage is stable within a certain range, thereby preventing damage to the super capacitor SUPER C1 caused by unstable voltage. The super capacitor SUPER C1 can provide additional energy storage capacity for the circuit. The super capacitor has high energy density and fast charging and discharging characteristics, making it suitable for energy compensation when the load changes rapidly, thereby maintaining a constant output voltage. The diode D5 can allow the super capacitor SUPER The energy stored in C1 is safely transmitted from the power supply end to the load circuit of the subsequent transformer, while the backflow is prevented to prevent the super capacitor SUPER C1 generates an effect.

[0032] Working principle:

[0033] That is, in use, the iron core is sleeved in the cable, when there is current in the cable, induced current and induced electromotive force are generated in the first coil L1 and the second coil L2, the induced current in the second coil L2 is converted into a stable output voltage through the subsequent filtering and rectifying unit and the voltage stabilizing unit, which is used for the load circuit of the transformer, so that the transformer can work without external power supply, the induced current in the first coil L1 is converted into a current signal through the signal acquisition unit and is output from two output ends, which is used for the subsequent analysis module to analyze and measure.

[0034] The above describes the utility model and its embodiments in a schematic manner, which is not restrictive, and the embodiments shown are only part of the embodiments of the utility model, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired thereby, without departing from the creative purpose of the utility model, similar structural modes and embodiments are designed without creativity, which should all belong to the protection scope of the utility model.

Claims

1. A self-powered transformer circuit comprising a core, characterized in that, The iron core is provided with a signal acquisition module and a power taking module. The signal acquisition module comprises a first coil L1 wound around the iron core. The first coil L1 is provided with an acquisition unit comprising a resistor R2 connected in parallel across the first coil L1. The resistor R2 is provided with two output ends. A capacitor C5 and a capacitor C6 are connected in sequence between the two output ends. The capacitor C5 and the capacitor C6 are grounded. The power taking module comprises a second coil L2 wound around the iron core. The second coil L2 is provided with a rectifier filter unit and a voltage stabilizing unit connected in sequence.

2. A self-powered transformer circuit according to claim 1, wherein, The rectifier filter unit comprises a transient suppression diode D1 connected in parallel across the second coil L2. The transient suppression diode D1 forms a first node and a second node across the two ends.

3. A self-powered transformer circuit according to claim 2, wherein, The rectifier filter unit further comprises a capacitor C1 connected in parallel at the second coil L2. The capacitor C1 forms a third node and a fourth node across the two ends. A capacitor C9 and a diode D2 are connected in sequence in series between the first node and the third node.

4. A self-powered transformer circuit according to claim 3, wherein, A fifth node is formed between the first node and the capacitor C9. A capacitor C12, a diode D3 and a capacitor C8 are connected in sequence between the fifth node and the fourth node.

5. A self-powered transformer circuit according to claim 4, wherein, A sixth node is formed between the capacitor C8 and the diode D3. A diode D6 and a capacitor C2 are connected between the sixth node and the third node.

6. A self-powered transformer circuit according to claim 5, wherein, The voltage stabilizing unit comprises a voltage stabilizing diode D4 connected in parallel across the capacitor C2. The voltage stabilizing diode D4 is provided with a super capacitor SUPERC1 connected in parallel across the two ends.

7. A self-powered transformer circuit according to claim 6, wherein, A positive terminal of the super capacitor SUPERC1 forms a power supply end. The power supply end is connected with a diode D5.

8. A self-powered transformer circuit according to claim 1, wherein, A resistor R3 is connected between the resistor R2 and the capacitor C5. A resistor R4 is connected between the resistor R2 and the capacitor C6.

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