CN2819446Y - Mufflering energy saver of AC contactor - Google Patents

Abstract

The utility model provides a mufflering energy-saving device for an AC contactor, which relates to the field of the application of AC contactors. The utility model aims to solve the problems of large AC noise, high electric power consumption, great temperature rise and low power factor existing in the AC contactors. In the utility model, the second input end of a three-phase bridge type non-controllable rectification circuit 2 is connected with the other end of an AC power supply by a C1, and the first input end of the three-phase bridge type non-controllable rectification circuit 2 is connected with the positive-electrode input end of a capacitor charging/discharging circuit 4 by a D5; the capacitor charging/discharging circuit 4 is connected with the DC side of a single-phase bridge type full-wave rectification circuit 5 in parallel, and a bidirectional-switch starting circuit 3 is connected to the AC side of the single-phase bridge type full-wave rectification circuit 5 in parallel; the output end of the capacitor charging/discharging circuit 4 is connected with the control-signal input end of the bidirectional-switch starting circuit 3, and the third AC input end of the non-controllable rectification circuit 2 and the other end of the AC power supply are respectively connected with two AC input ends of the full-wave rectification circuit 5. The utility model achieves the effects of noise elimination and energy saving, and causes that the temperature rise of the AC contactor 1 is lowered, and the power factor of the AC contactor 1 is enhanced. After the utility model is used, the electric power consumption of the AC contactor is decreased by more than 90 percent, and the AC contactor is wholly kept having no AC noise.

Description

A kind of noise reduction, energy saver that is used for A.C. contactor

Technical field:

The utility model relates to the application of A.C. contactor, is specifically related to a kind ofly can make A.C. contactor noise reduction, energy-conservation device.

Background technology:

Use the electromagnetic system of alternating current operation at present, can produce noise pollution, electromagnetic system such as jumbo A.C. contactor, the reason that above-mentioned noise produces is: one, the magnetostriction vibration sounding that produces under action of alternating magnetic field of core material, two, inhale the anti-espionage sexual maladjustment, armature produces the periodic vibration sounding, and the noise that reason one produces is an electromagnetic noise, be inevitably, can only be limited.Because A.C. contactor is a kind of inductive element, its power consumption is big, and power factor is low; Particularly in use for some time, the electromagnetic system adhesive of A.C. contactor is bad, and temperature raises, and can cause solenoid to burn out.So, how to solve that the A.C. contactor AC noise is big, power consumption is big, temperature rise, problem that power factor is low, having become A.C. contactor needs the technical problem underlying that solves in using.

The utility model content:

The purpose of this utility model is that the A.C. contactor AC noise is big in order to solve, power consumption is big, temperature rise, problem that power factor is low, thereby has developed a kind of noise reduction, energy saver that is used for A.C. contactor.

The utility model is by the uncontrollable rectification circuit 2 of three-phase bridge, bidirectional switch start-up circuit 3, capacitor charge and discharge circuit 4, single-phase bridge full-wave rectifying circuit 5, the 5th diode D5, the 3rd capacitor C 3 and first capacitor C 1 are formed, the first ac input end C of the uncontrollable rectification circuit 2 of three-phase bridge connects an end A of AC power and the positive terminal of the 5th diode D5, the second ac input end D of the uncontrollable rectification circuit 2 of three-phase bridge connects the other end B of AC power by first capacitor C 1, the negative pole end of the 5th diode D5 connects an end of the 3rd capacitor C 3, the DC side cathode output end of single-phase bridge full-wave rectifying circuit 5 and the electrode input end of capacitor charge and discharge circuit 4, the DC side cathode output end of single-phase bridge full-wave rectifying circuit 5 connects the negative input of capacitor charge and discharge circuit 4, the output of capacitor charge and discharge circuit 4 connects the signal input end of bidirectional switch start-up circuit 3, a power input of the power input of bidirectional switch start-up circuit 3 and the AC side of single-phase bridge full-wave rectifying circuit 5 all is connected the other end B of AC power, and another power input of another power input of bidirectional switch start-up circuit 3 and the AC side of single-phase bridge full-wave rectifying circuit 5 all is connected the 3rd ac input end E of the uncontrollable rectification circuit 2 of three-phase bridge.

As shown in Figure 1, the utility model utilizes the 5th diode D5 and single-phase bridge full-wave rectifying circuit 5 to make capacitor charge and discharge circuit 4 chargings, control 3 conductings of bidirectional switch start-up circuit with this, make A.C. contactor 1 adhesive move, finish making bidirectional switch start-up circuit 3 return to cut-off state again by the charging of capacitor charge and discharge circuit 4; Utilize the uncontrollable rectification circuit 2 of first capacitor C 1 and three-phase bridge to make A.C. contactor 1 be in the direct current hold mode then, reached noise elimination, energy-conservation effect, and A.C. contactor 1 temperature rise reduction, power factor are improved.The utility model reduces more than 90% A.C. contactor power consumption, does not have AC noise fully; After A.C. contactor had been installed the utility model, temperature rise reduced more than 70% during long-term work.The utility model does not have mechanical contact, is applicable to inflammable, explosive environments.

Description of drawings:

Fig. 1 is an electrical block diagram of the present utility model.

Embodiment:

Embodiment one: this embodiment is described in conjunction with Fig. 1, this embodiment is by A.C. contactor 1, the uncontrollable rectification circuit 2 of three-phase bridge, bidirectional switch start-up circuit 3, capacitor charge and discharge circuit 4, single-phase bridge full-wave rectifying circuit 5, the 5th diode D5, the 3rd capacitor C 3 and first capacitor C 1 are formed, two dc output ends of the uncontrollable rectification circuit 2 of three-phase bridge connect the two ends of the solenoid 1-1 of A.C. contactor 1, the first ac input end C of the uncontrollable rectification circuit 2 of three-phase bridge connects an end A of AC power and the positive terminal of the 5th diode D5, the second ac input end D of the uncontrollable rectification circuit 2 of three-phase bridge connects the other end B of AC power by first capacitor C 1, the negative pole end of the 5th diode D5 connects an end of the 3rd capacitor C 3, the DC side cathode output end of single-phase bridge full-wave rectifying circuit 5 and the electrode input end of capacitor charge and discharge circuit 4, the DC side cathode output end of single-phase bridge full-wave rectifying circuit 5 connects the negative input of capacitor charge and discharge circuit 4, the output of capacitor charge and discharge circuit 4 connects the signal input end of bidirectional switch start-up circuit 3, a power input of the power input of bidirectional switch start-up circuit 3 and the AC side of single-phase bridge full-wave rectifying circuit 5 all is connected the other end B of AC power, and another power input of another power input of bidirectional switch start-up circuit 3 and the AC side of single-phase bridge full-wave rectifying circuit 5 all is connected the 3rd ac input end E of the uncontrollable rectification circuit 2 of three-phase bridge.

Embodiment two: this embodiment is described in conjunction with Fig. 1, this embodiment with the difference of embodiment one is: bidirectional switch start-up circuit 3 is by the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the first thyristor T1 and the second thyristor T2 form, the negative pole end of the first diode D1 connects the anode tap of the first thyristor T1, the cathode terminal of the first thyristor T1 connects the positive terminal of the second diode D2 and the other end B of AC power, the negative pole end of the second diode D2 connects the anode tap of the second thyristor T2, the cathode terminal of the second thyristor T2 connects the 3rd ac input end E of the uncontrollable rectification circuit 2 of three-phase bridge and the positive terminal of the first diode D1, the control utmost point of the first thyristor T1 connects the negative pole end of the 3rd diode D3, the positive terminal of the 3rd diode D3 connects the output of capacitor charge and discharge circuit 4 and the positive terminal of the 4th diode D4, and the control utmost point of the second thyristor T2 connects the negative pole end of the 4th diode D4.Other compositions are identical with embodiment one with annexation.In this embodiment when the output of capacitor charge and discharge circuit 4 has the signal of telecommunication to make the 3rd diode D3 or the 4th diode D4 conducting, the first thyristor T1 or the second also conducting of thyristor T2, bidirectional switch start-up circuit 3 is opened.

Embodiment three: this embodiment is described in conjunction with Fig. 1, this embodiment with the difference of embodiment one is: capacitor charge and discharge circuit 4 is by first resistance R 1, second resistance R 2, the 3rd resistance R 3, second capacitor C 2 and voltage stabilizing didoe DW1 form, one end of the 3rd resistance R 3 connects the negative pole end of the 5th diode D5, the other end of the 3rd resistance R 3 connects an end of second capacitor C 2, one end of second resistance R 2 and the cathode terminal of voltage stabilizing didoe DW1, the other end of second capacitor C 2 links to each other with the positive terminal of the 3rd diode D3 in the bidirectional switch start-up circuit 3 with an end of first resistance R 1, and the other end of first resistance R 1 connects the other end of second resistance R 2, the DC side cathode output end of the anode tap of voltage stabilizing didoe DW1 and single-phase bridge full-wave rectifying circuit 5.Other compositions are identical with embodiment one with annexation.Second capacitor C 2 is a charge and discharge capacitance in this embodiment, and when the voltage charging on second capacitor C 2 reached the burning voltage of voltage stabilizing didoe DW1, charging was finished, and first resistance R, 1 two ends dividing potential drop is zero, and bidirectional switch start-up circuit 3 cuts out.

Claims (3)

1, a kind of noise reduction that is used for A.C. contactor, energy saver, it is characterized in that it is by the uncontrollable rectification circuit of three-phase bridge (2), bidirectional switch start-up circuit (3), capacitor charge and discharge circuit (4), single-phase bridge full-wave rectifying circuit (5), the 5th diode (D5), the 3rd electric capacity (C3) and first electric capacity (C1) are formed, first ac input end of the uncontrollable rectification circuit of three-phase bridge (2) connects an end (A) of AC power and the positive terminal of the 5th diode (D5), second ac input end (D) of the uncontrollable rectification circuit of three-phase bridge (2) connects the other end (B) of AC power by first electric capacity (C1), the negative pole end of the 5th diode (D5) connects an end of the 3rd electric capacity (C3), the electrode input end of the DC side cathode output end of single-phase bridge full-wave rectifying circuit (5) and capacitor charge and discharge circuit (4), the DC side cathode output end of single-phase bridge full-wave rectifying circuit (5) connects the negative input of capacitor charge and discharge circuit (4), the output of capacitor charge and discharge circuit (4) connects the signal input end of bidirectional switch start-up circuit (3), a power input of the power input of bidirectional switch start-up circuit (3) and the AC side of single-phase bridge full-wave rectifying circuit (5) all is connected the other end (B) of AC power, and another power input of another power input of bidirectional switch start-up circuit (3) and the AC side of single-phase bridge full-wave rectifying circuit (5) all is connected the 3rd ac input end (E) of the uncontrollable rectification circuit of three-phase bridge (2).

2, a kind of noise reduction that is used for A.C. contactor according to claim 1, energy saver, it is characterized in that bidirectional switch start-up circuit (3) is by first diode (D1), second diode (D2), the 3rd diode (D3), the 4th diode (D4), first thyristor (T1) and second thyristor (T2) are formed, the negative pole end of first diode (D1) connects the anode tap of first thyristor (T1), the cathode terminal of first thyristor (T1) connects the positive terminal of second diode (D2) and the other end (B) of AC power, the negative pole end of second diode (D2) connects the anode tap of second thyristor (T2), the cathode terminal of second thyristor (T2) connects the 3rd ac input end (E) of the uncontrollable rectification circuit of three-phase bridge (2) and the positive terminal of first diode (D1), the control utmost point of first thyristor (T1) connects the negative pole end of the 3rd diode (D3), the positive terminal of the 3rd diode (D3) connects the output of capacitor charge and discharge circuit (4) and the positive terminal of the 4th diode (D4), and the control utmost point of second thyristor (T2) connects the negative pole end of the 4th diode (D4).

3, a kind of noise reduction that is used for A.C. contactor according to claim 1 and 2, energy saver, it is characterized in that capacitor charge and discharge circuit (4) is by first resistance (R1), second resistance (R2), the 3rd resistance (R3), second electric capacity (C2) and voltage stabilizing didoe (DW1) are formed, one end of the 3rd resistance (R3) connects the negative pole end of the 5th diode (D5), the other end of the 3rd resistance (R3) connects an end of second electric capacity (C2), the cathode terminal of one end of second resistance (R2) and voltage stabilizing didoe (DW1), the other end of second electric capacity (C2) links to each other with the positive terminal of the 3rd diode (D3) in the bidirectional switch start-up circuit (3) with an end of first resistance (R1), and the other end of first resistance (R1) connects the other end of second resistance (R2), the DC side cathode output end of the anode tap of voltage stabilizing didoe (DW1) and single-phase bridge full-wave rectifying circuit (5).