CN107123575B - Power consumption control circuit of electric operating mechanism of circuit breaker - Google Patents
Power consumption control circuit of electric operating mechanism of circuit breaker Download PDFInfo
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- CN107123575B CN107123575B CN201610101448.1A CN201610101448A CN107123575B CN 107123575 B CN107123575 B CN 107123575B CN 201610101448 A CN201610101448 A CN 201610101448A CN 107123575 B CN107123575 B CN 107123575B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
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Abstract
A power consumption control circuit of an electric operating mechanism of a circuit breaker comprises a power supply circuit, a DC/DC power supply module circuit, a voltage stabilizing circuit and a control circuit; the power supply circuit comprises a rectifying circuit, a voltage reduction circuit and a filter circuit; the input end of the rectifying circuit is respectively connected with the power supply L phase and the power supply N, and the output end of the rectifying circuit is respectively connected with the input ends of the voltage reduction circuit and the filter circuit; the output end of the voltage reduction circuit is connected with the voltage stabilizing circuit, and the output end of the voltage stabilizing circuit is connected to the control circuit to supply power to the control circuit; the output end of the filter circuit is connected with the input end of the DC/DC power supply module circuit, the output end of the DC/DC power supply module circuit is connected with the input end of the voltage stabilizing circuit, and the output end of the DC/DC power supply module circuit is simultaneously connected with an electric operating mechanism of the circuit breaker to supply power to the electric operating mechanism of the circuit breaker; the input end of the control circuit inputs a control signal, and the output end of the control circuit is connected with the input end of the DC/DC power module circuit and used for controlling the on-off of the DC/DC power module circuit.
Description
Technical Field
The invention relates to the field of low-voltage electric appliances, in particular to a power consumption control circuit of an electric operating mechanism of a circuit breaker.
Background
At present, the power consumption of a breaker with an automatic reclosing function, which is used in cooperation with an intelligent electric energy meter in the market, is too large, so that the power consumption statistics of a user is influenced, and the waste of electric energy is caused. The power consumption control circuit of the electric operating mechanism of the existing circuit breaker has the following defects: 1, a single-path power supply is adopted, switching cannot be realized, and power consumption cannot be reduced; 2, a main circuit of the switching power supply needs to be directly cut off by using a high-voltage fully controllable device, the influence on system voltage is large, the reliability is not high, and the circuit design is complex.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a power consumption control circuit of an electric operating mechanism of a circuit breaker, which has safe and stable performance, low cost and simple structure.
In order to achieve the purpose, the invention adopts the following technical scheme:
a power consumption control circuit of an electric operating mechanism of a circuit breaker comprises a power supply circuit, a DC/DC power supply module circuit, a voltage stabilizing circuit and a control circuit; the power supply circuit comprises a rectifying circuit, a voltage reduction circuit and a filter circuit; the input end of the rectifying circuit is respectively connected with the power supply L phase and the power supply N, and the output end of the rectifying circuit is respectively connected with the input ends of the voltage reduction circuit and the filter circuit; the output end of the voltage reduction circuit is connected with the voltage stabilizing circuit and supplies power to the voltage stabilizing circuit when the control circuit is in a standby state, and the output end of the voltage stabilizing circuit is connected to the control circuit and supplies power to the control circuit; the output end of the filter circuit is connected with the input end of the DC/DC power module circuit; the DC/DC power supply module circuit comprises a DC/DC switching power supply chip U2, the output end of the DC/DC power supply module circuit is connected with the input end of the voltage stabilizing circuit and supplies power for the voltage stabilizing circuit when the control circuit is in a working state, and the output end of the DC/DC power supply module circuit is simultaneously connected with the electric operating mechanism of the circuit breaker to supply power to the electric operating mechanism of the circuit breaker; the input end of the control circuit inputs a control signal, and the execution end of the control circuit is connected with the power supply end of a DC/DC switching power supply chip U2 of the DC/DC power supply module circuit and is used for controlling the work of the DC/DC switching power supply chip U2 of the DC/DC power supply module circuit; when the electric operating mechanism of the circuit breaker works, a function starting signal is input to the input end of the control circuit, the execution end of the control circuit stops working, the power supply end of the DC/DC switching power supply chip U2 of the DC/DC power supply module circuit is enabled to recover power supply, the DC/DC power supply module circuit is enabled to be connected, after the electric operating mechanism of the circuit breaker stops working, the function stopping signal is input to the input end of the control circuit, the execution end of the control circuit starts working, the power supply end of the DC/DC switching power supply chip U2 of the DC/DC power supply module circuit is enabled to stop power supply, and the DC/DC power supply module circuit is enabled to be.
Further, the control circuit comprises a low-power fully controllable power device and a control chip U3, the input end of the control chip U3 inputs a control signal, the input end of the low-power fully controllable power device is connected with the control chip U3, the control chip U3 outputs a control level to the low-power fully controllable power device, the execution end of the low-power fully controllable power device is connected with the power input end of the DC/DC switching power chip U2 of the DC/DC power module circuit, the low-power fully controllable power device controls the work of the power end of the DC/DC switching power chip U2 of the DC/DC power module circuit to control the on-off of the DC/DC power module circuit, the low-power fully controllable power device is connected with the power end of the DC/DC switching power chip U2, the power supply of the switching power integrated chip is cut off by controlling the low-power fully controllable power device, to cut off the power supply loop connected with the main loop of the switching power supply chip.
Further, the control circuit further comprises a resistor R11, a resistor R8, a diode D10, a resistor R6, a diode D8, a polar capacitor C7, and a capacitor C8, and the low-power fully-controllable power device is a MOS transistor Q1; one end of a resistor R8 and a diode D10 which are connected in parallel is connected to a second pin of a control chip U3 through a resistor R11, the other end of the resistor R11 is connected with a grid electrode of an MOS tube and a source electrode of the MOS tube respectively, a drain electrode of the MOS tube is connected with one end of the resistor R6, a diode D8, a polarity capacitor C7 and a capacitor C8 are connected in parallel in sequence, one end of the diode D8 is connected with the other end of a resistor R6, and the other end of the capacitor C8 is connected with a negative electrode of a first pin polarity capacitor C7 of a DC/DC switch power supply chip U2 of the DC/DC power supply module.
Further, the DC/DC power supply module circuit further includes a voltage feedback circuit, a transformer T1, a resistor R2, a resistor R14, a resistor R3, a capacitor C2, a diode D7, a resistor R7, a diode D11, a polarity capacitor C9, and a resistor R10, one end of the resistor R2 is connected to an input terminal of the step-down circuit, the other end of the resistor R2 is connected to a first pin of the DC/DC switching power supply chip U2, a third pin of the DC/DC switching power supply chip U2 is connected to an output terminal of the voltage feedback circuit, an input terminal of the voltage feedback circuit is connected to an output terminal of a feedback loop on a primary side of the transformer T1, one end of the resistor R3 and the capacitor C2 connected in parallel is connected to an output terminal of the filter circuit, the other end is connected to a negative electrode of the diode D7, a positive electrode of the diode D7 is connected to one end of the resistor R7, and the other end of the resistor R7 is, the fifth pin and the sixth pin of the DC/DC switching power supply chip U2 are connected, the seventh pin and the eighth pin of the DC/DC switching power supply chip U2 are grounded respectively, the input end of the primary side main loop of the transformer T1 is connected with the other end of the capacitor C2, one output end of the secondary side of the transformer T1 is connected with the input end of the voltage stabilizing circuit, one end of the output end of the feedback loop of the secondary side of the transformer T1 is connected with the output end of the control circuit, the other end of the feedback loop is connected with the third pin of the switching power supply chip, one end of the other output end of the secondary side of the transformer T1 is connected with the anode of the diode D11, the cathode of the diode D11 is connected to the positive pole V + of the power supply, the other end of the other output end of the secondary side of the transformer T1 is grounded, the polarity capacitor C, on the other side of diode D11.
Further, the voltage feedback circuit comprises a polar capacitor C6, a resistor R5, a diode D9, a resistor R12 and a resistor R13; after the resistor R5, the diode D9, the resistor R12 and the resistor R13 are sequentially connected in series, one end of the resistor R5 is connected with the anode of the polar capacitor C6, one end of the diode D9 is connected with the output end of the feedback loop on the primary side of the transformer T1, the other end of the resistor R13 is connected with the ground, and the intermediate node of the resistor R12 and the resistor R13 is connected with the input end of the DC/DC power module circuit.
Further, the voltage stabilizing circuit comprises a voltage stabilizing power chip U1, a diode D6, a resistor R4, a polar capacitor C5, a capacitor C3, an inductance coil L5 and a capacitor C4, one end of the diode D6 is connected with the output end of the voltage reduction circuit, the other end of the diode D6 is connected to the ground after passing through the polar capacitor C5, the positive electrode of the polar capacitor C5 is connected to the first pin of the voltage stabilizing power chip U1 through a resistor R4, the output end of the DC/DC power module circuit is connected with one end of the inductance coil L5, the other end of the inductance coil L5 is connected to the first pin of the voltage stabilizing power chip U1 through a capacitor C3, the second pin of the voltage stabilizing power chip U1 is connected to the circuit ground VSS, the third pin of the voltage stabilizing power chip U1 is connected to the power supply voltage VCC, and two ends of the capacitor C4 are connected in parallel to the second pin of the voltage stabilizing.
Further, the rectification circuit is half-wave rectification and comprises a diode D1, a diode D2 and a diode D4, the L phase of the power supply comprises a power supply L1 phase, the L2 phase of the power supply and the L3 phase of the power supply are connected, the N phase of the power supply comprises a power supply N1 phase, a diode D1, one ends of a diode D2 and a diode D4 are respectively connected with the L1 phase of the power supply, the L2 phase of the power supply is connected with the L3 of the power supply, and the other ends of the diode D2 and the diode D4 are simultaneously. The voltage reducing circuit further comprises a fuse resistor FR1, one end of the fuse resistor FR1 is connected with the other ends of the diode D1, the diode D2 and the diode D4, and the other end of the fuse resistor FR1 is connected with the input ends of the voltage reducing circuit and the filter circuit.
The surge protection circuit comprises a piezoresistor VZ1, a piezoresistor VZ2 and a piezoresistor VZ3, wherein the power supply L phase comprises a power supply L1 phase, a power supply L2 phase and a power supply L3 phase, the power supply N phase comprises a power supply N1 phase, the piezoresistor VZ1, the piezoresistor VZ2 and the piezoresistor VZ3 are respectively connected between the power supply L1 phase and the power supply N1 phase in parallel, the power supply L2 phase and the power supply N1 phase are connected between the power supply L3 phase and the power supply N1 phase.
Further, the voltage reduction circuit comprises a diode D3 and a resistor R1, one end of the diode D3 is connected with the output end of the rectifying circuit, the other end of the diode D3 is connected with one end of the resistor R1, and the other end of the resistor R1 is connected with the input end of the voltage stabilizing circuit.
Further, the filter circuit comprises a diode D5, an inductance coil L4 and a capacitor C1, one end of the diode D5 is connected with the output end of the rectifying circuit, the other end of the diode D5 is connected with one end of the inductance coil L4, the other end of the inductance coil L4 is connected with the input end of the DC/DC power supply module circuit, the positive electrode of the capacitor C1 is connected with the other end of the inductance coil L4, and the negative electrode of the capacitor C1 is grounded.
The power consumption control circuit of the electric operating mechanism of the circuit breaker adopts a low-power voltage stabilizing circuit and a high-power DC/DC power module circuit, when the electric operating mechanism of the circuit breaker works, the execution end of the control circuit stops working, the DC/DC power module circuit is controlled to be switched on, the DC/DC power module circuit supplies power to the electric operating mechanism, and the voltage stabilizing circuit supplies power to the control circuit; when an electric operating mechanism of the circuit breaker stops working, an execution end of the control circuit works, the control circuit controls the circuit of the DC/DC power supply module to be disconnected, and only the voltage stabilizing circuit supplies power to the control circuit; the DC/DC power module circuit with higher power can be switched on and off according to requirements, so that the power consumption of an electric operating mechanism of the circuit breaker is reduced, the electric energy is saved, and the cost is reduced. The power supply circuit connected with the main circuit of the switching power supply chip is cut off by controlling the low-power fully controllable power device to cut off the power supply of the switching power supply integrated chip, instead of directly cutting off the power supply circuit by controlling the high-voltage fully controllable device, and therefore, the power supply circuit of the main circuit can be cut off by using the low-power device; the cost is low, the voltage fluctuation of the high-voltage main circuit is small, the circuit output is more stable, and the power consumption is low. The small-power fully-controllable power device can be a PNP type triode, a field effect MOS tube and other small-power devices. When the control circuit works, the MOS tube Q1 is controlled to be grounded through the resistor R8 to cut off the power supply to the DC/DC switching power supply chip U2, so that the DC/DC switching power supply chip U2 stops working.
Drawings
Fig. 1 is a frame diagram of a power consumption control circuit of an electric operating mechanism of the circuit breaker of the present invention;
fig. 2 is a circuit diagram of a power consumption control circuit of the electric operating mechanism of the circuit breaker of the present invention.
Detailed Description
The following describes a specific embodiment of the power consumption control circuit of the electric operating mechanism of the circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 2. The power consumption control circuit of the electric operating mechanism of the circuit breaker of the present invention is not limited to the description of the following embodiments.
As shown in FIG. 1, the power consumption control circuit of the electric operating mechanism of the circuit breaker of the invention comprises a power circuit, a DC/DC power module circuit, a voltage stabilizing circuit and a surge protection circuit; the power supply circuit comprises a rectifying circuit, a voltage reduction circuit and a filter circuit.
As shown in fig. 1, the input end of the rectifying circuit is connected with the power supply L phase and the power supply N, respectively, and the output end of the rectifying circuit is connected with the input ends of the voltage reducing circuit and the filter circuit, respectively; the output end of the voltage reduction circuit is connected with the voltage stabilizing circuit and supplies power to the voltage stabilizing circuit when the control circuit is in a standby state, and the output end of the voltage stabilizing circuit is connected to the control circuit and supplies power to the control circuit; the output end of the filter circuit is connected with the input end of a DC/DC power supply module circuit, the DC/DC power supply module circuit comprises a DC/DC switch power supply chip U2, the output end of the DC/DC power supply module circuit is connected with the input end of a voltage stabilizing circuit to supply power for the voltage stabilizing circuit when the control circuit is in a working state, and the output end of the DC/DC power supply module circuit is simultaneously connected with an electric operating mechanism of the circuit breaker to supply power to the electric operating mechanism of the circuit breaker; the control circuit is characterized by further comprising a control circuit, wherein a control signal is input into an input end of the control circuit, and an execution end of the control circuit is connected with a power supply end of a DC/DC switching power supply chip U2 of the DC/DC power supply module circuit and is used for controlling the work of the DC/DC switching power supply chip U2 of the DC/DC power supply module circuit; when the electric operating mechanism of the circuit breaker works, a function starting signal is input to the input end of the control circuit, the execution end of the control circuit stops working, the power supply end of the DC/DC switching power supply chip U2 of the DC/DC power supply module circuit is enabled to recover power supply, the DC/DC power supply module circuit is enabled to be connected, after the electric operating mechanism of the circuit breaker stops working, the function stopping signal is input to the input end of the control circuit, the execution end of the control circuit starts working, the power supply end of the DC/DC switching power supply chip U2 of the DC/DC power supply module circuit is enabled to stop power supply, and the DC/DC power supply module circuit is enabled to be. The power consumption control circuit of the electric operating mechanism of the circuit breaker adopts a low-power voltage stabilizing circuit and a high-power DC/DC power module circuit, when the electric operating mechanism of the circuit breaker works, the control circuit controls the DC/DC power module circuit to be switched on, the DC/DC power module circuit supplies power to the electric operating mechanism, and the voltage stabilizing circuit supplies power to the control circuit; when the electric operating mechanism of the circuit breaker stops working, the control circuit controls the circuit of the DC/DC power supply module to be disconnected, and only the voltage stabilizing circuit supplies power to the control circuit; the DC/DC power module circuit with higher power can be switched on and off according to requirements, so that the power consumption of an electric operating mechanism of the circuit breaker is reduced, the electric energy is saved, and the cost is reduced.
In the invention, the function starting signal and the function stopping signal are input by an external circuit.
As shown in fig. 1, the control circuit includes a low-power fully controllable power device and a control chip U3, a first pin of the control chip U3 inputs a control signal, an input terminal of the low-power fully controllable power device is connected to a second pin of the control chip U3, the second pin of the control chip U3 outputs a control level to the low-power fully controllable power device, an execution terminal of the low-power fully controllable power device is connected to a power input terminal of a DC/DC switching power chip U2 of the DC/DC power module circuit, and the low-power fully controllable power device controls operation of a power terminal of a DC/DC switching power chip U2 of the DC/DC power module circuit to control on/off of the DC/DC power module circuit. The low-power fully-controllable power device is connected with a power end of the DC/DC switching power supply chip U2, and a power supply loop connected with a main loop of the switching power supply chip is cut off by controlling the low-power fully-controllable power device to cut off a power supply of the switching power supply integrated chip, so that the effect of reducing power consumption is realized. The on-off of the DC/DC power module circuit is controlled by adopting a low-power fully-controllable power device, the voltage fluctuation of a high-voltage main circuit is small, and the circuit output is more stable.
The invention adopts the mode of controlling the low-power fully controllable power device to cut off the power supply of the integrated chip of the switching power supply to cut off the power supply loop of the main loop of the chip of the switching power supply, and just so, the low-power device can be used to cut off the power supply loop of the main loop.
Specifically, as shown in fig. 2, the control circuit further includes a resistor R11, a resistor R8, a diode D10, a resistor R6, a diode D8, a polar capacitor C7, and a capacitor C8, the low-power fully-controllable power device is a MOS transistor Q1, one end of the parallel connection of the resistor R8 and the diode D10 is connected to the second pin of the control chip U3 through the resistor R11, the other end of the parallel connection is connected to the gate of the MOS transistor Q1 and the source of the MOS transistor Q1, the drain of the MOS transistor Q1 is connected to one end of the resistor R6, the diode D8, the polar capacitor C7, and the capacitor C8 are sequentially connected in parallel, one end of the diode D8 is connected to the other end of the resistor R6, and the other end of the capacitor C8 is connected to the negative pole of the first polar capacitor C7 of the DC/DC switching power chip U2 of the DC/DC. When the control circuit works, the power supply to the DC/DC switching power supply chip U2 is cut off by controlling the MOS tube Q1 to be grounded through the resistor R8, so that the DC/DC switching power supply chip U2 stops working (the DC/DC switching power supply chip U2 can stop working as long as the circuit of any pin of the DC/DC switching power supply chip U2 is cut off), and the low-power fully-controllable power device can be a PNP type triode, a field effect MOS tube and other low-power devices. The high-voltage working circuit is turned off by adopting a power supply of a low-voltage device turn-off DC/DC switching power supply chip U2 such as an MOS tube Q1, the voltage fluctuation of a high-voltage main loop is small, the circuit output is more stable, the design of a driving circuit of a low-power fully controllable power device is simple, the selection cost of component parts is low, and the circuit realization function is reliable.
As shown in fig. 2, the DC/DC power module circuit further includes a transformer T1, a resistor R2, a resistor R14, a resistor R3, a capacitor C2, a diode D7, a resistor R7, a diode D11, a polarity capacitor C9, and a resistor R10, one end of the resistor R2 is connected to the input terminal of the step-down circuit, the other end of the resistor R2 is connected to the first pin of the DC/DC switching power chip U2, the third pin of the DC/DC switching power chip U2 is connected to the output terminal of the voltage feedback circuit, the input terminal of the voltage feedback circuit is connected to the output terminal of the feedback loop on the secondary side of the transformer T1, one end of the resistor R3 and the capacitor C2 connected in parallel is connected to the output terminal of the filter circuit, the other end is connected to the negative terminal of the diode D7, the positive terminal of the diode D7 is connected to one end of the resistor R7, the other ends of the resistors R7 are respectively, the fifth pin and the sixth pin of the DC/DC switching power supply chip U2 are connected, the seventh pin and the eighth pin of the DC/DC switching power supply chip U2 are grounded respectively, the input end of the primary side main loop of the transformer T1 is connected to the other end of the capacitor C2, one output end of the secondary side of the transformer T1 is connected to the input end of the voltage stabilizing circuit, one end of the output end of the feedback loop of the secondary side of the transformer T1 is connected to the output end of the control circuit, the other end of the output end of the primary side main loop of the transformer T1 is connected to the third pin of the switching power supply chip, one end of the other output end of the secondary side of the transformer T1 is connected to the anode of the diode D11, the cathode of the diode D11 is connected to the positive electrode V + of the power supply, the other end of the other output end of the secondary side of the transformer T1 is grounded.
As shown in fig. 2, the voltage feedback circuit includes a polar capacitor C6, a resistor R5, a diode D9, a resistor R12 and a resistor R13; after the resistor R5, the diode D9, the resistor R12 and the resistor R13 are sequentially connected in series, one end of the resistor R5 is connected with the anode of the polar capacitor C6, one end of the diode D9 is connected with the output end of a feedback loop on the secondary side of the transformer T1, the other end of the resistor R13 is connected with the ground, and an intermediate node of the resistor R12 and the resistor R13 is connected with the input end of the DC/DC power module circuit, namely the power supply end of the DC/DC switching power chip U2. The voltage feedback circuit regulates the voltage of the DC/DC switching power supply chip U2.
After receiving the function starting signal, the control chip U3 sends a control level to the low-power fully-controllable power device, the low-power fully-controllable power device stops working, a loop of connecting a chip power supply of the DC/DC switching power supply chip U2 to the ground through a resistor is disconnected, the DC/DC switching power supply chip U2 works, a main loop of the DC/DC switching power supply chip U2 is connected, and the transformer T1 starts to output electric energy. After receiving the function stop signal, the control chip U3 sends a control level to the low-power fully-controllable power device, the low-power fully-controllable power device starts to work, the chip power supply of the DC/DC switching power supply chip U2 is connected to the ground through a resistor, the DC/DC switching power supply chip U2 stops working, the main loop of the DC/DC switching power supply chip U2 is disconnected, and the transformer T1 stops outputting electric energy. When the transformer 10 works, the power is supplied to the voltage-stabilized power supply chip 11 to supply power to the working state of the control chip 6; feedback is provided for the DC/DC switching power supply chip 9, and the transformer 10 is controlled to output stably; and power is supplied to the electric operating mechanism to complete the opening and closing actions of the circuit breaker.
As shown in fig. 2, the voltage stabilizing circuit includes a regulated power supply chip U1, a diode D6, a resistor R4, a polarity capacitor C5, a capacitor C3, an inductor L5 and a capacitor C4, one end of the diode D6 is connected to the output end of the step-down circuit, the other end of the diode D6 is connected to ground through the polarity capacitor C5, the anode of the polarity capacitor C5 is connected to the first pin of the regulated power supply chip U1 through a resistor R4, the output end of the DC/DC power supply module circuit is connected to one end of the inductor L5, the other end of the inductor L5 is connected to the first pin of the regulated power supply chip U1 through a capacitor C3, the second pin of the regulated power supply chip U1 is connected to the ground VSS, the third pin of the regulated power supply chip U1 is connected to the supply voltage VCC, and the two ends of the capacitor C4 are connected in parallel to the second pin of the regulated power supply chip U58.
As shown in fig. 2, the rectifier circuit is half-wave rectification and comprises a diode D1, a diode D2 and a diode D4, the phase of the power supply L comprises a phase of the power supply L1, the phase of the power supply L2 and the phase of the power supply L3, the phase of the power supply N comprises a phase of the power supply N1, one end of each of the diode D1, the diode D2 and the diode D4 is respectively connected with the phase of the power supply L1, the phase of the power supply L2 is connected with the phase of the power supply L3, and the other end of each of the diode D. The rectifying circuit rectifies the three-phase alternating current into direct current.
In particular, as shown in fig. 2, a fuse resistor FR1 is further included, one end of the fuse resistor FR1 is connected to the other ends of the diode D1, the diode D2 and the diode D4, and the other end is connected to the input ends of the voltage reduction circuit and the filter circuit.
As shown in fig. 2, the surge protection circuit includes a voltage dependent resistor VZ1, a voltage dependent resistor VZ2 and a voltage dependent resistor VZ3, wherein a power supply L phase includes a power supply L1 phase, a power supply L2 phase and a power supply L3 phase, a power supply N phase includes a power supply N1 phase, a voltage dependent resistor VZ1, a voltage dependent resistor VZ2 and a voltage dependent resistor VZ3 are respectively connected in parallel between the power supply L1 phase and the power supply N1 phase, between the power supply L2 phase and the power supply N1 phase and between the power supply L3 phase and the power supply N1 phase. The surge protection circuit performs surge protection on the circuit, and the performance is safe and stable.
As shown in fig. 2, the voltage-reducing circuit includes a diode D3 and a resistor R1, one end of the diode D3 is connected to the output end of the rectifying circuit, the other end of the diode D3 is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the input end of the voltage-stabilizing circuit. The voltage reduction circuit reduces the voltage of the power supply and outputs the reduced voltage to the voltage stabilizing circuit.
As shown in fig. 2, the filter circuit includes a diode D5, an inductor L4 and a capacitor C1, one end of the diode D5 is connected to the output end of the rectifier circuit, the other end of the diode D5 is connected to one end of the inductor L4, the other end of the inductor L4 is connected to the input end of the DC/DC power module circuit, the anode of the capacitor C1 is connected to the other end of the inductor L4, and the cathode of the capacitor C1 is grounded.
In the invention, chips with different models can be selected according to specific conditions, and the positions and the numbers of pins with different models can be adjusted correspondingly according to the actually used chips.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. The utility model provides a power consumption control circuit of electric operating mechanism of circuit breaker which characterized in that: the DC/DC power supply module circuit comprises a power supply circuit, a DC/DC power supply module circuit, a voltage stabilizing circuit and a control circuit;
the power supply circuit comprises a rectifying circuit, a voltage reduction circuit and a filter circuit; the input end of the rectifying circuit is respectively connected with the power supply L phase and the power supply N, and the output end of the rectifying circuit is respectively connected with the input ends of the voltage reduction circuit and the filter circuit;
the output end of the voltage reduction circuit is connected with the voltage stabilizing circuit and supplies power to the voltage stabilizing circuit when the control circuit is in a standby state, and the output end of the voltage stabilizing circuit is connected to the control circuit and supplies power to the control circuit; the output end of the filter circuit is connected with the input end of a DC/DC power supply module circuit, the DC/DC power supply module circuit comprises a DC/DC switch power supply chip U2, the output end of the DC/DC power supply module circuit is connected with the input end of a voltage stabilizing circuit to supply power for the voltage stabilizing circuit when the control circuit is in a working state, and the output end of the DC/DC power supply module circuit is simultaneously connected with an electric operating mechanism of the circuit breaker to supply power to the electric operating mechanism of the circuit breaker;
the input end of the control circuit inputs a control signal, and the execution end of the control circuit is connected with the power supply end of a DC/DC switching power supply chip U2 of the DC/DC power supply module circuit and is used for controlling the DC/DC switching power supply chip U2 of the DC/DC power supply module circuit to work; when the electric operating mechanism of the circuit breaker works, a function starting signal is input to the input end of the control circuit, the execution end of the control circuit stops working, the power supply end of the DC/DC switching power supply chip U2 of the DC/DC power supply module circuit is enabled to recover power supply, the DC/DC power supply module circuit is enabled to be connected, after the electric operating mechanism of the circuit breaker stops working, the function stopping signal is input to the input end of the control circuit, the execution end of the control circuit starts working, the power supply end of the DC/DC switching power supply chip U2 of the DC/DC power supply module circuit is enabled to stop power supply, and the DC/DC power supply module circuit is enabled to be.
2. The power consumption control circuit of an electric operating mechanism of a circuit breaker according to claim 1, characterized in that: the control circuit comprises a low-power fully-controllable power device and a control chip U3, wherein a control signal is input at the input end of the control chip U3, the input end of the low-power fully-controllable power device is connected with the control chip U3, the control chip U3 outputs a control level to the low-power fully-controllable power device, the execution end of the low-power fully-controllable power device is connected with the input end of a DC/DC switching power chip U2 of a DC/DC power module circuit, the low-power fully-controllable power device controls the work of the power end of a DC/DC switching power chip U2 of the DC/DC power module circuit to control the on-off of the DC/DC power module circuit, the low-power fully-controllable power device is connected with the power end of the DC/DC switching power chip U2, and the power supply of the switching power integrated chip is cut off by controlling the low-, to cut off the power supply loop connected with the main loop of the switching power supply chip.
3. The power consumption control circuit of an electric operating mechanism of a circuit breaker according to claim 2, characterized in that: the control circuit further comprises a resistor R11, a resistor R8, a diode D10, a resistor R6, a diode D8, a polar capacitor C7 and a capacitor C8, and the low-power fully-controllable power device is an MOS transistor Q1; one end of a resistor R8 and one end of a diode D10 which are connected in parallel are connected to a second pin of the control chip U3 through a resistor R11, the other end of the resistor R8 is connected with a grid of a MOS tube Q1 and a source of the MOS tube Q1, a drain of the MOS tube Q1 is connected with one end of a resistor R6, one end of a diode D8 is connected with the other end of a resistor R6 after the diode D8, a polarity capacitor C7 and a capacitor C8 are sequentially connected in parallel, the other end of the capacitor C8 is connected with a first pin of a DC/DC switching power supply chip U2 of the DC/DC power supply module circuit, and a negative electrode of the polarity capacitor C7.
4. The power consumption control circuit of an electric operating mechanism of a circuit breaker according to claim 1, characterized in that: the DC/DC power supply module circuit further comprises a voltage feedback circuit transformer T1, a resistor R2, a resistor R14, a resistor R3, a capacitor C2, a diode D7, a resistor R7, a diode D11, a polarity capacitor C9 and a resistor R10, wherein one end of the resistor R2 is connected with the input end of the voltage reduction circuit, the other end of the resistor R2 is connected with a first pin of the DC/DC switching power supply chip U2, a third pin of the DC/DC switching power supply chip U2 is connected with the output end of the voltage feedback circuit, the input end of the voltage feedback circuit is connected with the output end of the feedback loop at the secondary side of the transformer T1, one end of the parallel connection of the resistor R3 and the capacitor C2 is connected with the output end of the filter circuit, the other end of the parallel connection of the diode D7 is connected with the negative pole of the diode D7, the positive pole of the diode D7 is connected with one end of the resistor 573R 5, the, the fifth pin and the sixth pin of the DC/DC switching power supply chip U2 are connected, the seventh pin and the eighth pin of the DC/DC switching power supply chip U2 are grounded, the input terminal of the primary side main loop of the transformer T1 is connected to the other terminal of the capacitor C2, one output terminal of the secondary side of the transformer T1 is connected to the input terminal of the voltage stabilizing circuit, one end of the output terminal of the feedback loop of the secondary side of the transformer T1 is connected to the output terminal of the control circuit, the other end is connected to the third pin of the DC/DC switching power supply chip U2, one end of the other output terminal of the secondary side of the transformer T1 is connected to the positive terminal of the diode D11, the negative terminal of the diode D11 is connected to the positive terminal V + of the power supply, the other end of the other output terminal of the secondary side of the transformer T1 is grounded, the polar capacitor C9 and, on the other side of diode D11.
5. The power consumption control circuit of an electric operating mechanism of a circuit breaker according to claim 4, characterized in that: the voltage feedback circuit comprises a polar capacitor C6, a resistor R5, a diode D9, a resistor R12 and a resistor R13; the resistor R5, the diode D9, the resistor R12 and the resistor R13 are sequentially connected in series, one end of the resistor R5 is connected with the anode of the polar capacitor C6, one end of the diode D9 is connected with the output end of a feedback loop on the secondary side of the transformer T1, the other end of the resistor R13 is connected to the ground, and the middle node of the resistor R12 and the resistor R13 is connected with the input end of the DC/DC power module circuit.
6. The power consumption control circuit of an electric operating mechanism of a circuit breaker according to claim 1, characterized in that: the voltage stabilizing circuit comprises a voltage stabilizing power supply chip U1, a diode D6, a resistor R4, a polar capacitor C5, a capacitor C3, an inductance coil L5 and a capacitor C4, wherein one end of the diode D6 is connected with the output end of the voltage reducing circuit, the other end of the diode D6 is connected to the ground after passing through the polar capacitor C5, the positive electrode of the polar capacitor C5 is connected to the first pin of the voltage stabilizing power supply chip U1 through a resistor R4, the output end of the DC/DC power supply module circuit is connected with one end of the inductance coil L5, the other end of the inductance coil L5 is connected to the first pin of the voltage stabilizing power supply chip U1 through a capacitor C3, the second pin of the voltage stabilizing power supply chip U1 is connected to the circuit ground VSS, the third pin of the power supply chip U1 is connected to the power supply voltage VCC, and two ends of the capacitor C5 are connected in parallel to the second.
7. The power consumption control circuit of an electric operating mechanism of a circuit breaker according to claim 1, characterized in that: the rectification circuit is half-wave rectification and comprises a diode D1, a diode D2 and a diode D4, wherein a power supply L phase comprises a power supply L1 phase, the power supply L2 phase and a power supply L3 phase are connected, a power supply N phase comprises a power supply N1 phase, one ends of a diode D1, a diode D2 and a diode D4 are respectively connected with the power supply L1 phase, the power supply L2 phase is connected with the power supply L3, and the other ends of the diodes are simultaneously connected with the input ends of the voltage reduction circuit and the filter circuit; the voltage reducing circuit further comprises a fuse resistor FR1, one end of the fuse resistor FR1 is connected with the other ends of the diode D1, the diode D2 and the diode D4, and the other end of the fuse resistor FR1 is connected with the input ends of the voltage reducing circuit and the filter circuit.
8. The power consumption control circuit of an electric operating mechanism of a circuit breaker according to claim 1, characterized in that: the surge protection circuit comprises a piezoresistor VZ1, a piezoresistor VZ2 and a piezoresistor VZ3, wherein a power supply L phase comprises a power supply L1 phase, a power supply L2 phase and a power supply L3 phase, a power supply N phase comprises a power supply N1 phase, a piezoresistor VZ1, a piezoresistor VZ2 and a piezoresistor VZ3 are respectively connected between the power supply L1 phase and the power supply N1 phase in parallel, and between the power supply L2 phase and the power supply N1 phase and between the power supply L3 phase and the power supply N1 phase.
9. The power consumption control circuit of an electric operating mechanism of a circuit breaker according to claim 1, characterized in that: the voltage reduction circuit comprises a diode D3 and a resistor R1, one end of a diode D3 is connected with the output end of the rectifying circuit, the other end of a diode D3 is connected with one end of a resistor R1, and the other end of a resistor R1 is connected with the input end of the voltage stabilizing circuit.
10. The power consumption control circuit of an electric operating mechanism of a circuit breaker according to claim 1, characterized in that: the filter circuit comprises a diode D5, an inductance coil L4 and a capacitor C1, one end of the diode D5 is connected with the output end of the rectifying circuit, the other end of the diode D5 is connected with one end of the inductance coil L4, the other end of the inductance coil L4 is connected with the input end of the DC/DC power module circuit, the anode of the capacitor C1 is connected with the other end of the inductance coil L4, and the cathode of the capacitor C1 is grounded.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610101448.1A CN107123575B (en) | 2016-02-24 | 2016-02-24 | Power consumption control circuit of electric operating mechanism of circuit breaker |
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| CN201610101448.1A CN107123575B (en) | 2016-02-24 | 2016-02-24 | Power consumption control circuit of electric operating mechanism of circuit breaker |
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| CN107123575B true CN107123575B (en) | 2020-02-18 |
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| CN108712066A (en) * | 2018-07-17 | 2018-10-26 | 尼力德（宝鸡）起重机有限公司 | A kind of crane brake power circuit |
| CN110855279A (en) * | 2019-12-11 | 2020-02-28 | 贵州航天凯山石油仪器有限公司 | Circuit breaker for cutting off power supply at regular time |
| CN113809938A (en) * | 2020-06-12 | 2021-12-17 | 上海正泰智能科技有限公司 | Small-sized breaker switch power circuit |
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| JP5920017B2 (en) * | 2012-05-22 | 2016-05-18 | アイシン精機株式会社 | Cogeneration system |
| CN202856418U (en) * | 2012-10-29 | 2013-04-03 | 上海富贯智能科技有限公司 | Energy storage type lithium battery pack power supply system |
| CN204465147U (en) * | 2015-04-13 | 2015-07-08 | 悦动智能电器有限公司 | A kind of power control circuit of motor-operating mechanism of circuit breaker |
| CN205564671U (en) * | 2016-02-24 | 2016-09-07 | 浙江正泰电器股份有限公司 | Electric operating mechanism's of circuit breaker power consumption control circuit |
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