CN206865120U - Standby power-off energy-saving device for high-power electric equipment - Google Patents

Abstract

The utility model relates to a standby power-off energy-saving device for high-power electric equipment and high-power electric equipment, which comprises: a magnetic trip switch connected to the power supply line of the electric equipment; and a standby power-off circuit for collecting the power supply line current, and when the current is in the standby state, the trigger magnetic trip switch is disconnected to cut off the standby power supply of the electrical equipment; the utility model collects the power consumption of the electrical equipment through the standby power-off circuit connected in series in the power supply line of the electrical equipment The current of the power supply line, that is, when the current is in the standby state, triggers the disconnection of the magnetic trip switch connected to the power supply line of the electrical equipment to cut off the standby power supply of the electrical equipment; the high-power electrical equipment of the utility model is powered off in standby The energy-saving device can be widely used in high-power electrical equipment that does not involve safety devices. When the high-power electrical equipment is in the standby state, it can turn off the power of the equipment in standby with the minimum power consumption to save energy.

Description

High-power electrical equipment standby power-off energy-saving device

technical field

The utility model relates to the control system field of automation technology, in particular to an energy-saving device for standby power-off of high-power electrical equipment.

Background technique

Usually, if the standby state of high-power electrical equipment does not involve the power supply of safety devices, the equipment can be turned off to save power. At present, existing related products such as current relays use large current to close (circuit) and small current to normally open (open circuit). There may be only a short break, and the power consumption of the relay is not a small number calculated on a monthly basis. The utility model can realize the shutdown of the equipment power supply in standby mode with the minimum power consumption.

Utility model content

The purpose of the utility model is to provide a standby power-off energy-saving device for high-power electrical equipment, so as to realize turning off the power supply of the equipment during standby.

In order to solve the above technical problems, the utility model provides an energy-saving device for standby power-off of high-power electrical equipment, including: a magnetic trip switch connected to the power supply line of the electrical equipment; and a standby power-off circuit for collecting power supply The current of the line, and when the current is in the standby state, the trigger magnetic trip switch is disconnected to cut off the standby power supply of the electrical equipment.

Further, the standby power-off circuit includes: a transformer, the primary coil of the transformer is connected to the power supply line, and its secondary coil is connected to a bridge rectifier circuit; the positive output terminal of the bridge rectifier circuit is correspondingly output Terminal is connected with the anode of diode D6, diode D5; The cathode of described diode D6 is connected with the base of PNP type transistor, and the cathode of described diode D5 is connected with the emitter of PNP type transistor; The base of described PNP type transistor is also connected It is connected to a charging and discharging circuit, and its emitter is also connected to an electrolytic capacitor C2, and its collector is connected to a magnetic trip switch coil; when the electrical equipment is working normally, the electrolytic capacitor C2 is charged to increase the emitter potential of the PNP transistor, and At the same time, the charging and discharging circuit charges and raises the base potential of the PNP transistor to cut off the PNP transistor; when the current is in the standby state, the charging and discharging circuit discharges, when the base potential of the PNP transistor is lower than the emitter of the PNP transistor When the potential is high, the electrolytic capacitor C2 discharges the coil of the magnetic trip switch, triggers the reset of the magnetic trip switch, and cuts off the power supply line.

Further, the grading step-down circuit includes a grading switch and several diodes connected in series; each diode cathode is used as a grading voltage contact; one end of the grading switch is connected to a bridge rectifier circuit, and the other movable end is suitable for respectively Connect with the corresponding grading voltage contacts to achieve a grading step-down output.

Further, the charging and discharging circuit includes: an electrolytic capacitor C1 and a resistor R1 arranged in parallel; wherein the anode of the electrolytic capacitor C1 is connected to the base of the PNP transistor, and the resistor R1 is suitable for forming a discharge circuit of the electrolytic capacitor C1 to The discharge rate of the electrolytic capacitor C1 is not greater than the charging rate of the electrolytic capacitor C1.

Further, the magnetic trip switch is an AC magnetic trip switch, then an AC relay is connected to the AC power supply line corresponding to the electrical equipment, and the AC relay is triggered by discharging through the electrolytic capacitor C2, so that the AC relay is connected The coil of the AC magnetic trip switch is energized, which triggers the reset of the magnetic trip switch and cuts off the power supply line.

The beneficial effect of the utility model is that the utility model collects the current of the power supply line of the electrical equipment through the standby power-off circuit connected in series in the power supply line of the electrical equipment, that is, when the current is in the standby state, the trigger and the power supply circuit of the electrical equipment The connected magnetic trip switch is disconnected to cut off the standby power supply of electrical equipment; the energy-saving device for standby power failure of high-power electrical equipment of the present utility model can be widely used in high-power electrical equipment that does not involve safety devices. When the electrical equipment is in the standby state, the power supply of the equipment is turned off with the minimum power consumption to save power.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is the standby power-off circuit when the utility model adopts a DC magnetic trip switch;

Fig. 2 is the standby power-off circuit when the utility model adopts the AC magnetic trip switch.

in:

Transformer B, bridge rectifier circuit D, graded switch K, diodes D1-D6, electrolytic capacitor C1, electrolytic capacitor C2, resistor R1, PNP transistor BG1, magnetic trip switch coil L, magnetic trip switch QL.

detailed description

Now in conjunction with accompanying drawing, the utility model is described in further detail. These drawings are all simplified schematic diagrams, and only schematically illustrate the basic structure of the utility model, so they only show the configurations related to the utility model.

As shown in Figure 1 and Figure 2, the present embodiment 1 provides a standby power-off energy-saving device for high-power electrical equipment, including: a magnetic trip switch QL, connected to the power supply line of the electrical equipment; and a standby power-off circuit , used to collect the current of the power supply line, and when the current is in the standby state, trigger the magnetic trip switch QL to turn off, so as to cut off the standby power supply of the electrical equipment.

Optionally, the power supply line may use single-phase 220V power supply, or three-phase 380V power supply; in Embodiment 1, single-phase 220V power supply is used.

The standby power-off circuit includes: a transformer B, the primary coil of the transformer B is connected to the power supply line, and its secondary coil is connected to a bridge rectifier circuit D; the positive output terminal of the bridge rectifier circuit D passes through a step-down circuit The corresponding output terminals are connected to the anodes of diode D6 and diode D5; the cathode of the diode D6 is connected to the base of the PNP transistor BG1, and the cathode of the diode D5 is connected to the emitter of the PNP transistor BG1; the PNP transistor The base of BG1 is also connected to a charging and discharging circuit, its emitter is also connected to an electrolytic capacitor C2, and its collector is connected to the magnetic trip switch coil L; when the electrical equipment is working normally, the electrolytic capacitor C2 is charged to make the PNP transistor BG1 The emitter potential rises, and at the same time, the charging and discharging circuit charges and raises the base potential of the PNP transistor BG1, so that the PNP transistor BG1 is cut off; when the current is in the standby state, the charging and discharging circuit discharges, and when the base of the PNP transistor BG1 When the pole potential is lower than the emitter potential of the PNP transistor BG1, the electrolytic capacitor C2 discharges the coil L of the magnetic trip switch, triggers the reset of the magnetic trip switch QL, and cuts off the power supply line.

The step-down circuit includes a step-down switch K and several diodes connected in series; each diode cathode is used as a step-down voltage contact; one end of the step-down switch K is connected to a bridge rectifier circuit D, and the other movable end is suitable for Connect with the corresponding classification voltage contacts respectively to realize the classification step-down output.

Optionally, the stepped-down step-down circuit adopts four diodes (D1-D4) for step-down step-down, selected by a step-down switch K, which is suitable for transformer B to meet the needs of various currents.

The charging and discharging circuit includes: an electrolytic capacitor C1 and a resistor R1 arranged in parallel; wherein the anode of the electrolytic capacitor C1 is connected to the base of the PNP transistor BG1, and the resistor R1 is suitable for forming a discharge circuit of the electrolytic capacitor C1, so that The discharge rate of the electrolytic capacitor C1 is not greater than the charge rate of the electrolytic capacitor C1.

Specifically, close the magnetic trip switch QL (if the starting current of the electrical equipment is greater than the rated current, a large-capacity switch needs to be connected in parallel in the power supply line, first turn on the large-capacity switch, and then close the magnetic trip switch , and then turn off the large-capacity switch), the equipment is powered on, and the transformer B starts to collect the working current of the equipment, and its output is rectified by the bridge rectifier circuit D, and then the electrolytic capacitor C1 and the electrolytic capacitor C2 are charged respectively after being stepped down by the step-down circuit. At this time, the base of the PNP transistor BG1 and the voltage of the transmitter rise synchronously, and the PNP transistor BG1 is not turned on; when the device enters the standby state, the output voltage and current of the transformer B drop sharply, and the voltage of the electrolytic capacitor C1 begins to drop, and the drop speed Determined by the size of the electrolytic capacitor C1 and the resistor R1, when the voltage of the electrolytic capacitor C1 is lower than the voltage of the electrolytic capacitor C2 and reaches the conduction threshold of the PNP transistor BG1, the electrolytic capacitor C2 supplies the coil of the magnetic trip switch through the PNP transistor BG1. L discharges, triggers the reset of the magnetic trip switch QL, and cuts off the power supply line of the equipment.

The magnetic trip switch QL may be a DC magnetic trip switch or an AC magnetic trip switch. Specifically, in order to adapt to larger current equipment and match with existing AC control products, the magnetic trip switch QL adopts an AC magnetic trip switch, and an AC relay is connected to the AC power supply line corresponding to the electrical equipment, and through The electrolytic capacitor C2 discharges and triggers the AC relay, so that the coil L of the AC magnetic trip switch connected to the AC relay is energized, triggers the reset of the magnetic trip switch QL, and cuts off the power supply line.

After the power supply line is cut off, zero power consumption is achieved.

Specifically, the AC relay adopts a solid state relay AC-SSR.

Inspired by the above ideal embodiment according to the utility model, through the above description content, relevant staff can completely make various changes and modifications within the scope of not deviating from the technical idea of the utility model. The technical scope of this utility model is not limited to the content in the description, but must be determined according to the scope of the claims.

Claims (5)

1. A high-power electrical equipment standby power-off energy-saving device, characterized in that it comprises: Magnetic trip switch, connected to the power supply line of the electrical equipment; and The standby power-off circuit is used to collect the current of the power supply line, and When the current is in the standby state, the trigger magnetic trip switch is disconnected to cut off the standby power supply of the electrical equipment. 2. The energy saving device according to claim 1, characterized in that: The standby power-off circuit includes: Transformer, the primary coil of the transformer is connected to the power supply line, and its secondary coil is connected with a bridge rectifier circuit; The positive output end of the bridge rectifier circuit is connected to the anodes of the diode D6 and the diode D5 through the corresponding output end of the step-down circuit; The cathode of the diode D6 is connected to the base of the PNP transistor, and the cathode of the diode D5 is connected to the emitter of the PNP transistor; The base of the PNP transistor is also connected to a charging and discharging circuit, its emitter is also connected to an electrolytic capacitor C2, and its collector is connected to a magnetic trip switch coil; When the electrical equipment is working normally, the electrolytic capacitor C2 is charged to increase the emitter potential of the PNP transistor, and at the same time the charging and discharging circuit charges and raises the base potential of the PNP transistor, so that the PNP transistor is cut off; When the current is in the standby state, the charging and discharging circuit discharges, and when the base potential of the PNP transistor is lower than the emitter potential of the PNP transistor, the electrolytic capacitor C2 discharges the coil of the magnetic trip switch, triggering the reset of the magnetic trip switch and cutting off power supply circuit. 3. The energy saving device according to claim 2, characterized in that: The step-down circuit includes: Grading toggle switches, and a number of diodes connected in series; Each diode cathode is used as a graded voltage contact; One end of the grading changeover switch is connected to a bridge rectifier circuit, and the other movable end is adapted to be respectively connected to corresponding grading voltage contacts to realize a grading step-down output. 4. The energy saving device according to claim 3, characterized in that: The charging and discharging circuit includes: an electrolytic capacitor C1 and a resistor R1 arranged in parallel; wherein The anode of the electrolytic capacitor C1 is connected to the base of the PNP transistor, and the resistor R1 is suitable for forming a discharge circuit of the electrolytic capacitor C1, so that the discharge speed of the electrolytic capacitor C1 is not greater than the charging speed of the electrolytic capacitor C1. 5. The energy-saving device according to claim 4, characterized in that: The magnetic trip switch is an AC magnetic trip switch, then Connect the AC relay to the AC power supply line corresponding to the electrical equipment, and The AC relay is triggered by discharging through the electrolytic capacitor C2, so that the AC magnetic trip switch coil connected to the AC relay is energized, the magnetic trip switch is triggered to reset, and the power supply line is cut off.