CN110244814B - Electromechanical low-voltage equipment power compensation circuit - Google Patents
Electromechanical low-voltage equipment power compensation circuit Download PDFInfo
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- CN110244814B CN110244814B CN201910400109.7A CN201910400109A CN110244814B CN 110244814 B CN110244814 B CN 110244814B CN 201910400109 A CN201910400109 A CN 201910400109A CN 110244814 B CN110244814 B CN 110244814B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/625—Regulating voltage or current wherein it is irrelevant whether the variable actually regulated is ac or dc
Abstract
The invention discloses a power compensation circuit of electromechanical low-voltage equipment, which comprises a power signal acquisition circuit, a feedback voltage stabilizing circuit, an abnormal signal screening circuit, a rectification calibration circuit, a differential comparison circuit and an operational amplifier amplitude limiting circuit, wherein the power signal acquisition circuit adopts a power collector J1 with the model number of AD8318 to acquire power signals of a power supply of the electromechanical low-voltage equipment, the feedback voltage stabilizing circuit adopts a triode Q1, a triode Q2 and a voltage stabilizing tube D4 to form the feedback voltage stabilizing circuit to stabilize the signals, the abnormal signal screening circuit adopts a silicon controlled VTL1 and a voltage stabilizing tube D11 to form an abnormal signal detection circuit to detect output signals of the feedback voltage stabilizing circuit, the differential comparison circuit adopts an operational amplifier AR 1-an operational amplifier AR3 and a variable resistor RW2 to carry out differential comparison and adjustment on the signals, and finally the operational amplifier AR4 is used by the operational amplifier AR4 to amplify the signals in phase, so that the power of, and converting the power signal into a compensation signal for the power of the electromechanical low-voltage device power supply.
Description
Technical Field
The invention relates to the technical field of circuits, in particular to a power compensation circuit of electromechanical low-voltage equipment.
Background
At present, equipment is generally a general name of material data such as machinery, devices, facilities and the like needed by people in production and life, electromechanical equipment is equipment applying mechanical and electronic technologies, the mechanical equipment is also the most important component of the electromechanical equipment, a power supply of the electromechanical equipment supplies power for voltage of a city grid, a voltage converter in the electromechanical equipment supplies power for the electromechanical equipment after voltage transformation, and due to the fact that electromechanical low-voltage equipment is too long in running time and easy to generate heat and friction loss between the equipment, voltage output power loss after voltage transformation of the voltage converter in the low-voltage electromechanical equipment can be increased, namely, the situation that the power of the power supply of the electromechanical equipment is insufficient is caused, electric arcs are easy to occur when the electromechanical equipment runs for a long time, fire disasters are caused, and loss which is difficult to estimate is caused.
The present invention provides a new solution to this problem.
Disclosure of Invention
In view of the above situation, in order to overcome the defects of the prior art, the present invention aims to provide a power compensation circuit for an electromechanical low-voltage device, which has the characteristics of ingenious design and humanized design, can monitor the power of a power supply of the electromechanical low-voltage device in real time, and can convert a power signal into a compensation signal of the power supply of the electromechanical low-voltage device.
The technical scheme for solving the problem is that the power compensation circuit of the electromechanical low-voltage equipment comprises a power signal acquisition circuit, a feedback voltage stabilizing circuit, an abnormal signal screening circuit, a rectification calibration circuit, a differential comparison circuit and an operational amplifier amplitude limiting circuit, wherein the power signal acquisition circuit acquires a power signal of a power supply of the electromechanical low-voltage equipment by using a power collector J1 with the model number of AD8318, and uses an inductor L1, a capacitor C2 and a capacitor C3 to form a pi-type filter circuit for filtering, the feedback voltage stabilizing circuit uses a triode Q1, a triode Q2 and a voltage stabilizing tube D4 to form a feedback voltage stabilizing circuit for stabilizing the signal, meanwhile, the rectification calibration circuit further stabilizes the signal potential by using a constant current circuit consisting of a triode Q3, a triode Q4 and a voltage stabilizing tube D10, and uses a variable resistor RW1, a diode D2 and a diode D3 to form a rectification circuit for rectifying the signal and, the abnormal signal screening circuit detects an output signal of the feedback voltage stabilizing circuit by using an abnormal signal detection circuit consisting of a silicon controlled rectifier VTL1 and a voltage stabilizing tube D11, simultaneously, a frequency selection circuit consisting of a capacitor C5-a capacitor C7 and a resistor R10-a resistor R12 is used for screening a signal with single frequency and inputting the signal into a differential comparison circuit, the differential comparison circuit compares and adjusts the signal difference by using an operational amplifier AR 1-an operational amplifier AR3 and a variable resistor RW2, finally, the operational amplifier amplitude limiting circuit amplifies the signal in phase by using an operational amplifier AR4, and a limiting circuit consisting of a diode D5 and a diode D6 limits the signal and outputs the signal, namely a compensation signal of the power supply power of the electromechanical low-voltage equipment;
the feedback voltage stabilizing circuit comprises a triode Q1, wherein the collector of a triode Q1 is connected with one end of a resistor R2, the base of the triode Q1 is connected with the other end of a resistor R2 and the collector of a triode Q2, the emitter of a triode Q1 is connected with one ends of a resistor R3 and a resistor R4, the emitter of a triode Q2 is connected with the negative electrode of a voltage regulator tube D4 and the other end of a resistor R3, the base of the triode Q2 is connected with the other end of a resistor R4 and one end of a resistor R5, and the other end of the resistor R5 and the positive electrode of a voltage regulator tube D4;
the rectification calibration circuit comprises a triode Q3, the base of the triode Q3 is connected with the negative electrode of a diode D9 and the collector of a triode Q4, the emitter of the triode Q3 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with one end of a resistor R6 and one end of a capacitor C8, the collector of the triode Q3 is connected with the other end of a capacitor RW 8, the base of the triode Q4 and the negative electrode of a voltage regulator D10, the positive electrode of the voltage regulator D10 is grounded, the positive electrode of the diode D10 is connected with the other end of the resistor R10, the emitter of the triode Q10 is connected with one end of the resistor R10, the other end of the resistor R10 is connected with the positive electrode of the diode D10, the negative electrode of the diode D10, one end of the capacitor C10 and one end of the capacitor C10, the negative electrode of the diode D10 is connected with the other end of the contact 2 of the capacitor C10, and the contact;
the abnormal signal screening circuit comprises a thyristor VTL1, wherein the anode of the thyristor VTL1 is connected with the emitter of a triode Q1 and the cathode of a voltage regulator tube D11, the cathode of the thyristor VTL1 is connected with one end of a resistor R9, the control electrode of the thyristor VTL1 is connected with the anode of a voltage regulator tube D1, one end of a resistor R8 and one end of a capacitor C4, the other ends of the resistor R8 and the capacitor C4 are grounded, the other end of the resistor R9 is connected with one end of a resistor R10 and one end of a capacitor C5, the other end of the resistor R10 is connected with one end of a resistor R12 and one end of a capacitor C6, the other end of the capacitor C5 is connected with one end of a capacitor C7 and a resistor R11, the other ends of a resistor R11 and a capacitor C6.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages;
1, a feedback voltage stabilizing circuit consisting of a triode Q1, a triode Q2 and a voltage stabilizing tube D4 is used for stabilizing signals, the voltage stabilizing tube D4 is used for stabilizing the potential of an emitter of a triode Q2, the potentials of an emitter of a triode Q1 and a base of a triode Q2 are stabilized, namely signals are stably output, meanwhile, the rectification calibration circuit further stabilizes the signal potential by using a constant current circuit consisting of a triode Q3, a triode Q4 and a voltage regulator tube D10, stabilizes the collector potential of the triode Q3 by using a voltage regulator tube D10, namely stabilizes the emitter potential of the triode Q4, the triode Q3 and the triode Q4 are composite switch circuits, a capacitor C8 is a bypass capacitor, high-frequency signal noise is filtered, and a rectifying circuit consisting of a variable resistor RW1, a diode D2 and a diode D3 is used for rectifying signals and inputting the signals into the differential comparison circuit, the output signal potential can be adjusted by adjusting the resistance value of the variable resistor RW1, so that the reliability is high;
2. an abnormal signal detection circuit consisting of a thyristor VTL1 and a voltage regulator tube D11 is used for detecting an output signal of a feedback voltage stabilizing circuit, a conduction power supply of the thyristor VTL1 is used for judging an abnormal signal, the potential of the abnormal signal is higher than that of a normal signal, a frequency selection circuit consisting of a capacitor C5-a capacitor C7 and a resistor R10-a resistor R12 is used for screening a signal with single frequency, the signal is input into a differential comparison circuit, the stability of the signal frequency can be ensured, harmonic waves are avoided, the differential comparison circuit uses an operational amplifier AR 1-an operational amplifier AR3 and a variable resistor RW2 for signal differential comparison and adjustment, the influence on the circuit caused by the change of external conditions can be inhibited, and the static working point of the signal is.
Drawings
FIG. 1 is a block diagram of a power compensation circuit for an electromechanical low voltage device according to the present invention.
Fig. 2 is a schematic diagram of a power compensation circuit of an electromechanical low voltage device according to the present invention.
FIG. 3 is a signal flow diagram of a power compensation circuit of an electromechanical low voltage device according to the present invention.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings of fig. 1 to 3. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
The power compensation circuit comprises a power signal acquisition circuit, a feedback voltage stabilizing circuit, an abnormal signal screening circuit, a rectification calibration circuit, a differential comparison circuit and an operational amplifier amplitude limiting circuit, wherein the power signal acquisition circuit adopts a power collector J1 with the model number of AD8318 to acquire a power signal of a power supply of electromechanical low-voltage equipment, an inductor L1, a capacitor C2 and a capacitor C3 to form a pi-type filter circuit for filtering, the feedback voltage stabilizing circuit adopts a triode Q1, a triode Q2 and a voltage stabilizing tube D4 to form a feedback voltage stabilizing circuit for stabilizing signals, the rectification calibration circuit adopts a constant current circuit consisting of a triode Q3, a triode Q4 and a voltage stabilizing tube D10 to further stabilize the signal potential, and adopts a variable resistor RW1, a diode D2 and a diode D3 to form a rectification circuit for rectifying signals and inputting the rectified signals into the differential comparison circuit, wherein the abnormal signal screening circuit adopts a silicon controlled rectifier VTL1 and a voltage stabilizing tube D11 to form an abnormal signal detection circuit for detecting the feedback stable The voltage circuit outputs signals, a frequency selection circuit consisting of a capacitor C5-a capacitor C7 and a resistor R10-a resistor R12 is used for screening out signals with single frequency, the signals are input into a differential comparison circuit, the differential comparison circuit uses an operational amplifier AR 1-an operational amplifier AR3 and a variable resistor RW2 for differential comparison and adjustment of the signals, finally, the operational amplifier amplitude limiting circuit uses an operational amplifier AR4 for amplifying the signals in phase, and uses a diode D5 and a diode D6 for forming an amplitude limiting circuit for limiting the signals and then outputting the signals, namely compensating signals of power supply power of electromechanical low-voltage equipment;
the feedback voltage stabilizing circuit comprises a feedback voltage stabilizing circuit consisting of a triode Q1, a triode Q2 and a voltage regulator tube D4, stabilizes the emitter potential of a triode Q2 by using a voltage regulator tube D4, stabilizes the base potential of a triode Q1 and a triode Q2, namely stabilizes output signals, simultaneously, a rectification calibration circuit further stabilizes the signal potential by using a constant current circuit consisting of a triode Q3, a triode Q4 and a voltage regulator tube D10, stabilizes the collector potential of a triode Q3 by using a voltage regulator tube D10, namely stabilizes the emitter potential of a triode Q4, a triode Q3 and a triode Q4 are composite switch circuits, a capacitor C8 is a bypass capacitor, high-frequency signal noise is filtered, a rectifying circuit consisting of a variable resistor RW1, a diode D2 and a diode D3 is used for rectifying signals, then the rectified signals are input into a differential comparison circuit, and the output signal potential can be adjusted by adjusting the resistance of a variable resistor RW1, the abnormal signal screening circuit detects an output signal of the feedback voltage stabilizing circuit by using an abnormal signal detection circuit consisting of a thyristor VTL1 and a voltage stabilizing tube D11, judges an abnormal signal by using a conduction power supply of the thyristor VTL1, has the potential of the abnormal signal higher than that of a normal signal, and simultaneously screens out a signal with single frequency by using a frequency selection circuit consisting of a capacitor C5, a capacitor C7 and a resistor R10 and a resistor R12 to be input into a differential comparison circuit, so that the stability of the signal frequency can be ensured, and harmonic waves are avoided, the differential comparison circuit compares and adjusts the signal difference by using an operational amplifier AR1, an operational amplifier AR3 and a variable resistor RW2, the influence of the change of external conditions on the circuit can be inhibited, and the static working point of the signal;
the specific circuit structure is that the collector of a triode Q1 is connected with one end of a resistor R2, the base of a triode Q1 is connected with the other end of the resistor R2 and the collector of a triode Q2, the emitter of a triode Q1 is connected with one end of a resistor R3 and a resistor R4, the emitter of the triode Q2 is connected with the negative electrode of a voltage regulator tube D4 and the other end of the resistor R3, the base of a triode Q2 is connected with the other end of the resistor R4 and one end of a resistor R5, and the other end of the resistor R5 and the positive electrode of a voltage regulator tube D4 are grounded; the base of the triode Q3 is connected with the negative electrode of the diode D9 and the collector of the triode Q4, the emitter of the triode Q3 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with one end of a resistor R6 and one end of a capacitor C8, the collector of the triode Q3 is connected with the other end of a capacitor RW 8, the base of the triode Q4 and the negative electrode of a voltage regulator D10, the positive electrode of the voltage regulator D10 is grounded, the positive electrode of the diode D9 is connected with the other end of the resistor R6, the emitter of the triode Q4 is connected with one end of the resistor R4, the other end of the resistor R4 is connected with the positive electrode of the diode D4, the negative electrode of the diode D4, one end of the capacitor C4 and one end of the capacitor C4, the negative electrode of the diode D4 is connected with the other end of the contact 2 of the capacitor RW 4, and the contact 1; the positive electrode of a thyristor VTL1 is connected with the emitting electrode of a triode Q1 and the negative electrode of a voltage regulator tube D11, the negative electrode of the thyristor VTL1 is connected with one end of a resistor R9, the control electrode of the thyristor VTL1 is connected with the positive electrode of a voltage regulator tube D1, one end of a resistor R8 and one end of a capacitor C4, the other ends of the resistor R8 and the capacitor C4 are grounded, the other end of the resistor R9 is connected with one end of a resistor R10 and one end of a capacitor C5, the other end of the resistor R10 is connected with one end of a resistor R12 and one end of a capacitor C6, the other end of the capacitor C5 is connected with one end of a capacitor C7 and one end of a resistor R11, the other ends of a resistor R2 and; the non-inverting input end of the operational amplifier AR2 is connected with the other end of the resistor R12, the inverting input end of the operational amplifier AR2 is connected with one end of the resistor R15, the contact 1 and the contact 3 of the variable resistor RW2, the output end of the operational amplifier AR2 is connected with the other end of the resistor R15 and one end of the resistor R14, the contact 2 of the variable resistor RW2 is connected with one end of the resistor R16 and the non-inverting input end of the operational amplifier AR1, the inverting input end of the operational amplifier AR1 is connected with the contact 3 of the variable resistor RW1, the output end of the operational amplifier AR1 is connected with the other end of the resistor R16 and one end of the resistor R17, the other end of the resistor R17 is connected with the non-inverting input end of the resistor R22 and the non-inverting input end of the operational amplifier AR3, the other.
In the second embodiment, on the basis of the first embodiment, the operational amplifier amplitude limiting circuit amplifies a signal in phase by using an operational amplifier AR4, compensates for conduction loss of the signal, and outputs the signal after limiting the signal by using a limiting circuit composed of a diode D5 and a diode D6, so as to play a role of a protection circuit, that is, a compensation signal of power of a power supply for an electromechanical low-voltage device, a non-inverting input terminal of the operational amplifier AR4 is connected to one end of a resistor R18 and a resistor R20, the other end of the resistor R18 is connected to an output terminal of an operational amplifier AR3, an inverting input terminal of the operational amplifier AR4 is connected to one end of a resistor R19, the other end of a resistor R19 is grounded, an output terminal of the operational amplifier AR4 is connected to the other end of a resistor R20, the cathode of a diode D5, the anode of a diode D6, the anode of a diode D5 is connected to the cathode of a diode D.
In a third embodiment, on the basis of the first embodiment, the power signal acquisition circuit selects a power signal of an AD8318 power collector J1 collector J1 to acquire a power signal of a power supply of an electromechanical low-voltage device, a pi-type filter circuit consisting of an inductor L1, a capacitor C2 and a capacitor C3 is used for filtering and filtering signal noise, a power supply end of the power collector J1 is connected to +5V and one end of a capacitor C1, a ground end of the power collector J1 is grounded, an output end of the power collector J1 is connected to the other end of the capacitor C1, one end of the inductor L1, one end of the capacitor C2 and a negative electrode of a regulator D1, an anode of the regulator D1 is grounded, the other end of the capacitor C2 is grounded, the other end of the inductor L1 is connected to one end of a resistor R1 and one end of the capacitor C3, the other end of the capacitor C3 is grounded.
When the invention is used in particular, the power compensation circuit of the electromechanical low-voltage equipment comprises a power signal acquisition circuit, a feedback voltage stabilizing circuit, an abnormal signal screening circuit, a rectification calibration circuit, a differential comparison circuit and an operational amplifier amplitude limiting circuit, wherein the power signal acquisition circuit adopts a power collector J1 with the model number of AD8318 to acquire a power signal of a power supply of the electromechanical low-voltage equipment, adopts an inductor L1, a capacitor C2 and a capacitor C3 to form a pi-shaped filter circuit for filtering, adopts a triode Q1, a triode Q2 and a voltage stabilizing tube D4 to form a feedback voltage stabilizing circuit for stabilizing signals, adopts a voltage stabilizing tube D4 to stabilize the emitter potential of the triode Q2, realizes the stabilization of the base potentials of the emitter of the triode Q1 and the base potential of the triode Q2, namely the stabilization of output signals, and simultaneously adopts a constant current circuit consisting of the triode Q3, the triode Q4 and the voltage stabilizing tube D10 to, a voltage regulator tube D10 is used for stabilizing the potential of a collector of a triode Q3, namely the potential of an emitter of a triode Q4, the triode Q3 and the triode Q4 are composite switch circuits, a capacitor C8 is a bypass capacitor for filtering high-frequency signal noise, a rectifying circuit consisting of a variable resistor RW1, a diode D2 and a diode D3 is used for rectifying signals and then inputting the rectified signals into a differential comparison circuit, the potential of an output signal can be adjusted by adjusting the resistance of a variable resistor RW1, an abnormal signal screening circuit consists of a silicon controlled VTL1 and a voltage regulator tube D11 and detects an output signal of a feedback voltage stabilizing circuit, a conduction power supply of the silicon controlled VTL1 judges abnormal signals, the potential of the abnormal signals is higher than that of normal signals, a frequency selection circuit consisting of a capacitor C5-capacitor C7 and a resistor R10-resistor R12 is used for screening the signals with single frequency and inputting into the differential comparison circuit, and the, the harmonic waves are avoided, the differential comparison circuit utilizes an operational amplifier AR 1-an operational amplifier AR3 and a variable resistor RW2 to carry out differential comparison and adjustment on signals, the influence on the circuit caused by the change of external conditions can be restrained, the static working point of the signals is stabilized, finally, the operational amplifier amplitude limiting circuit utilizes the operational amplifier AR4 to amplify the signals in phase, and a limiting circuit consisting of a diode D5 and a diode D6 is utilized to limit the signals and then output the signals, namely the compensation signals of the power supply power of the electromechanical low-voltage equipment.
While the invention has been described in further detail with reference to specific embodiments thereof, it is not intended that the invention be limited to the specific embodiments thereof; for those skilled in the art to which the present invention pertains and related technologies, the extension, operation method and data replacement should fall within the protection scope of the present invention based on the technical solution of the present invention.
Claims (3)
1. A power compensation circuit for electromechanical low-voltage equipment comprises a power signal acquisition circuit, a feedback voltage stabilizing circuit, an abnormal signal screening circuit, a rectification calibration circuit, a differential comparison circuit and an operational amplifier amplitude limiting circuit, and is characterized in that the power signal acquisition circuit acquires a power signal of a power supply of the electromechanical low-voltage equipment by using a power collector J1 with the model number AD8318, and uses an inductor L1, a capacitor C2 and a capacitor C3 to form a pi-shaped filter circuit for filtering, the feedback voltage stabilizing circuit uses a triode Q1, a triode Q2 and a voltage stabilizing tube D4 to form a feedback voltage stabilizing circuit for stabilizing signals, the rectification calibration circuit further stabilizes signal potential by using a constant current circuit consisting of the triode Q3, the triode Q7 and the voltage stabilizing tube D10, and inputs the rectified signal into the differential comparison circuit by using a variable resistor RW2, a diode D2 and a diode D3 to form a rectification circuit for rectifying the signal, wherein the abnormal signal screening circuit uses a silicon controlled rectifier VTL1 and a voltage stabilizing tube D11 The feedback voltage stabilizing circuit outputs signals, a frequency selection circuit consisting of a capacitor C5-a capacitor C7 and a resistor R10-a resistor R12 is used for screening out signals with single frequency and inputting the signals into a differential comparison circuit, the differential comparison circuit uses an operational amplifier AR 1-an operational amplifier AR3 and a variable resistor RW2 for carrying out differential comparison and adjustment on the signals, finally, the operational amplifier amplitude limiting circuit uses an operational amplifier AR4 for amplifying the signals in phase, and uses a diode D5 and a diode D6 for forming an amplitude limiting circuit for limiting the signals and outputting the signals, namely compensating signals of power supply power of electromechanical low-voltage equipment;
the feedback voltage stabilizing circuit comprises a triode Q1, wherein the collector of a triode Q1 is connected with one end of a resistor R2, the base of the triode Q1 is connected with the other end of a resistor R2 and the collector of a triode Q2, the emitter of a triode Q1 is connected with one ends of a resistor R3 and a resistor R4, the emitter of a triode Q2 is connected with the negative electrode of a voltage regulator tube D4 and the other end of a resistor R3, the base of the triode Q2 is connected with the other end of a resistor R4 and one end of a resistor R5, and the other end of the resistor R5 and the positive electrode of a voltage regulator tube D4;
the rectification calibration circuit comprises a triode Q3, the base of the triode Q3 is connected with the negative electrode of a diode D9 and the collector of a triode Q4, the emitter of the triode Q3 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with one end of a resistor R6 and one end of a capacitor C8, the collector of the triode Q3 is connected with the other end of a capacitor RW 8, the base of the triode Q4 and the negative electrode of a voltage regulator D10, the positive electrode of the voltage regulator D10 is grounded, the positive electrode of the diode D10 is connected with the other end of the resistor R10, the emitter of the triode Q10 is connected with one end of the resistor R10, the other end of the resistor R10 is connected with the positive electrode of the diode D10, the negative electrode of the diode D10, one end of the capacitor C10 and one end of the capacitor C10, the negative electrode of the diode D10 is connected with the other end of the contact 2 of the capacitor C10, and the contact;
the abnormal signal screening circuit comprises a thyristor VTL1, wherein the anode of the thyristor VTL1 is connected with the emitter of a triode Q1 and the cathode of a voltage regulator tube D11, the cathode of the thyristor VTL1 is connected with one end of a resistor R9, the control electrode of a thyristor VTL1 is connected with the anode of a voltage regulator tube D11, one end of a resistor R8 and one end of a capacitor C4, the other ends of a resistor R8 and a capacitor C4 are grounded, the other end of the resistor R9 is connected with one end of a resistor R10 and one end of a capacitor C5, the other end of a resistor R10 is connected with one end of a resistor R12 and one end of a capacitor C6, the other end of a capacitor C5 is connected with one end of a capacitor C7 and a resistor R11, the other ends of a resistor R11 and a capacitor C6;
the differential comparison circuit comprises an operational amplifier AR2, wherein the non-inverting input end of the operational amplifier AR2 is connected with the other end of a resistor R12, the inverting input end of the operational amplifier AR2 is connected with one end of a resistor R15, the contact 1 and the contact 3 of a variable resistor RW2, the output end of the operational amplifier AR2 is connected with the other end of a resistor R15 and one end of a resistor R14, the contact 2 of the variable resistor RW2 is connected with one end of the resistor R16 and the non-inverting input end of the operational amplifier AR1, the inverting input end of the operational amplifier AR1 is connected with the contact 3 of the variable resistor RW1, the output end of the operational amplifier AR1 is connected with the other end of a resistor R16 and one end of a resistor R17, the other end of the resistor R17 is connected with one end of a resistor R22 and the non-inverting input end of the operational amplifier AR3, the other end of.
2. The power compensation circuit of claim 1, wherein the operational amplifier limiter circuit comprises an operational amplifier AR4, a non-inverting input terminal of the operational amplifier AR4 is connected to one terminal of a resistor R18 and a resistor R20, the other terminal of the resistor R18 is connected to an output terminal of the operational amplifier AR3, an inverting input terminal of the operational amplifier AR4 is connected to one terminal of a resistor R19, the other terminal of the resistor R19 is connected to ground, an output terminal of the operational amplifier AR4 is connected to the other terminal of the resistor R20, the cathode of a diode D5, the anode of a diode D6, the anode of a diode D5 is connected to the cathode of a diode D6 and the one terminal of a resistor R21, and the other terminal of the resistor R21 is connected to the signal output port.
3. The electromechanical low-voltage device power compensation circuit as claimed in claim 1, wherein the power signal collection circuit comprises a power collector J1 with model number AD8318, a power supply end of the power collector J1 is connected to +5V and one end of a capacitor C1, a ground end of the power collector J1 is grounded, an output end of the power collector J1 is connected to the other end of the capacitor C1 and to the inductor L1, one end of the capacitor C2 and a negative electrode of a voltage regulator D1, an anode of the voltage regulator D1 is grounded, the other end of the capacitor C2 is grounded, the other end of the inductor L1 is connected to a resistor R1 and one end of a capacitor C3, the other end of the capacitor C3 is grounded, and the other end of the resistor R1 is connected to a collector of a transistor Q1.
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