Low-power-consumption relay circuit

Abstract

The utility model relates to a low-power-consumption relay circuit. The device comprises a power supply, a switch, a controlled electric element, a microchip and a normally-closed relay, the power supply, the switch and the controlled electric element are connected in series to form a controlled circuit, the power supply supplies power to the microchip at the same time, and two normally-closed contacts of the normally-closed relay are connected into the controlled circuit. A coil power supply pin on the normally-closed relay is also connected to the controlled circuit, the switch can be used for controlling the controlled electric element and the normally-closed relay at the same time, and a collector pin on the normally-closed relay is electrically connected with the microchip. The whole system not only has an anti-theft function, but also has the advantages that in the long-time standby process, only the microchip consumes little power, the relay does not consume power, the relay only starts to consume power when the controlled circuit is powered on, the power-on frequency and the power-on duration of the controlled circuit are not long under the normal condition, and the power-on time of the controlled circuit is not long. Therefore, the whole system has better energy consumption performance, and the power consumption of the power supply can be effectively reduced.

Description

Technical Field

[0001] This embodiment relates to a relay circuit, and more particularly to a low power consumption relay circuit. Background Art

[0002] A relay is an electrical control device. It is an electrical appliance that causes a predetermined step change in the controlled quantity in the electrical output circuit when the change in the input quantity (excitation quantity) reaches the specified requirements. It has an interactive relationship between the control system (also known as the input circuit) and the controlled system (also known as the output circuit). It is usually used in automated control circuits. It is actually an "automatic switch" that uses a small current to control the operation of a large current. Therefore, it plays the role of automatic adjustment, safety protection, and circuit conversion in the circuit. The electromagnetic relay is the most common relay. It is a relay that works by using the suction effect generated by the current in the input circuit between the electromagnetic coil and the armature. According to the contact state of the relay when the electromagnetic coil is not energized, it is divided into a normally closed electromagnetic relay and a normally open electromagnetic relay. Existing relays are generally controlled by chips, and the opening and closing of the relay is realized by controlling the high and low changes of the potential of the chip. Even in the low potential state, the electromagnetic coil is in the on state, and the relay will still generate a certain amount of power consumption. Therefore, even when the existing relay control circuit is in standby mode, it will continue to consume power, resulting in power waste. Summary of the invention

[0003] This embodiment provides a low-power relay circuit, which solves the problem of continuous power consumption of relays in relay circuits in the prior art.

[0004] The above technical problems of the present embodiment are mainly solved by the following technical solutions: a low-power relay circuit, characterized in that it includes a power supply, a switch, a controlled electrical component, a microchip and a normally closed relay, the power supply, the switch and the controlled electrical component are connected in series to form a controlled circuit, the power supply also supplies power to the microchip, the two normally closed contacts of the normally closed relay are connected to the controlled circuit, the coil power supply pin on the normally closed relay is also connected to the controlled circuit, the switch can be used to simultaneously control the controlled electrical component and the normally closed relay, and the collector pin on the normally closed relay is electrically connected to the microchip.

[0005] Furthermore, the power supply is a DC regulated power supply.

[0006] Furthermore, the power supply is also connected in parallel with a rectifier circuit.

[0007] Furthermore, a three-terminal voltage regulator is connected in series between the coil power supply pin on the normally closed relay and the controlled circuit.

[0008] The controlled electrical components in this embodiment generally have the characteristics of low frequency of use and short usage time each time. Therefore, it is necessary to reduce power consumption during long-term standby. The design intention of this embodiment is to avoid the situation where the controlled electrical components are stolen, and at the same time it has an extremely power-saving effect. Its working principle is: when the system is in standby mode, the microchip has not received the instruction to allow the controlled electrical components to be enabled. At this time, the microchip continuously outputs a low potential to the relay, the coil in the relay does not work, and the relay is in a normally closed state. If the user directly closes the switch at this time, the controlled circuit is in a conducting state and the relay is turned on. After the coil of the relay is energized, the collector on the relay will send a signal that the coil is energized to the microchip. Since the microchip has not received the instruction to allow the controlled electrical component to be enabled at this time, the preset program of the microchip will automatically and instantaneously send a high potential to the collector, so that the relay will immediately become disconnected, the controlled circuit cannot continue to be energized, and the controlled electrical component cannot work. Therefore, this embodiment has an anti-theft function. At the same time, when in the standby state, since the controlled circuit is in the disconnected state, the electromagnetic coil on the relay is also in the open circuit state, so the relay will not consume power, so that the entire embodiment does not consume power except for the microchip;

[0009] When the microchip receives an instruction to allow the controlled electrical component to be enabled, the microchip sends a continuous low-voltage signal to the control circuit of the relay. At this time, the switch is closed again, and the electromagnetic coil of the relay and the controlled electrical component are energized at the same time. Since the electromagnetic coil is at a low potential, the relay is in a long-closed state, the controlled electrical component can continue to be energized and work, and the relay itself is also in a low-power consumption state.

[0010] Therefore, the whole system not only has the effect of preventing theft, but also the power consumption of the relay in the system is very limited. The relay is only in the low-potential power-on state when the controlled circuit is normally powered, and in the high-potential working state in the case of theft. When in the standby state, which accounts for the longest time, the coil of the relay is in the disconnected state and does not generate power consumption. Therefore, the whole system has a good energy consumption performance, which can effectively reduce the power consumption of the power supply and increase the overall use time.

[0011] Therefore, compared with the prior art, this embodiment has the following characteristics: 1. The entire system not only has an anti-theft function, but also during a long period of standby, only the microchip itself consumes a little power, and the relay does not consume power. The relay only starts to consume power when the controlled circuit is energized. Under normal circumstances, the power-on frequency and power-on time of the controlled circuit are not long. Therefore, the entire system has better energy consumption performance and can effectively reduce the power consumption of the power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attached Figure 1 is a circuit diagram of the present embodiment in a standby state;

[0013] Attached Figure 2 is a circuit diagram of this embodiment when it is normally powered on;

[0014] Attached Figure 3 This is a circuit diagram when the present embodiment is stolen. DETAILED DESCRIPTION

[0015] The technical solution of this embodiment is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0016] In the description of this embodiment, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this embodiment.

[0017] Embodiment 1: A low-power relay circuit includes a DC regulated power supply 10, a switch 20, a controlled electrical component (automobile ignition) 30, a microchip 40 and a normally closed relay 50. The DC regulated power supply is connected in parallel with a rectifier circuit 60. The DC regulated power supply, the switch and the controlled electrical component are connected in series to form a controlled circuit. The DC regulated power supply also supplies power to the microchip. The two normally closed contacts of the normally closed relay are connected to the controlled circuit. The coil power supply pin on the normally closed relay is also connected to the controlled circuit. The switch can be used to simultaneously control the controlled electrical component and the normally closed relay. The collector pin on the normally closed relay is electrically connected to the microchip.

[0018] A three-terminal voltage regulator 80 is also connected in series between the coil power supply pin on the normally closed relay and the controlled circuit.

[0019] The controlled electrical component in this embodiment is a car igniter, which is not used frequently and is not used for a long time each time. Therefore, it is necessary to reduce power consumption during long standby periods. The design of this embodiment is intended to avoid the theft of the controlled electrical component and has an extremely power-saving effect. Its working principle is: when the system is in standby mode, the microchip does not receive an instruction to allow the controlled electrical component to be enabled. At this time, the microchip continuously outputs a low potential to the relay, the coil in the relay does not work, and the relay is in a normally closed state. If the user directly closes the switch at this time, the controlled circuit is in a conducting state. After the relay coil is energized, the collector on the relay will send a signal that the coil is energized to the microchip. Since the microchip has not received an instruction to allow the controlled electrical component to be enabled at this time, the preset program of the microchip will automatically and instantaneously send a high potential to the collector, so that the relay will immediately become disconnected, the controlled circuit cannot continue to be energized, and the controlled electrical component cannot work. Therefore, this embodiment has an anti-theft function. At the same time, when in the standby state, since the controlled circuit is in the disconnected state, the electromagnetic coil on the relay is also in the open circuit state, so the relay will not consume power, so that the entire embodiment does not consume power except for the microchip.

[0020] When the microchip receives an instruction to allow the controlled electrical component to be enabled, the microchip sends a continuous low-voltage signal to the control circuit of the relay. At this time, the switch is closed again, and the electromagnetic coil of the relay and the controlled electrical component are energized at the same time. Since the electromagnetic coil is at a low potential, the relay is in a long-closed state, the controlled electrical component can continue to be energized and work, and the relay itself is also in a low-power consumption state.

[0021] Therefore, the whole system not only has the effect of preventing theft, but also the power consumption of the relays in the system is very limited. The relays are only in the low-potential power-on state when the controlled circuit is normally powered, and in the high-potential working state in the case of theft. When in the standby state, which accounts for the longest time, the relays are in the open circuit state and do not generate power consumption. Therefore, the whole system has a good energy consumption performance, which can effectively reduce the power consumption of the power supply and increase the overall use time.

[0022] It is obvious to those skilled in the art that this embodiment can be changed in many ways, and such changes are not considered to be out of the scope of this embodiment. All such modifications obvious to those skilled in the art will be included in the scope of this claim.

Claims

1. A low power consumption relay circuit, characterized in that: The invention comprises a power supply, a switch, a controlled electrical component, a microchip and a normally closed relay. The power supply, the switch and the controlled electrical component are connected in series to form a controlled circuit. The power supply also supplies power to the microchip. The two normally closed contacts of the normally closed relay are connected to the controlled circuit. The coil power supply pin on the normally closed relay is also connected to the controlled circuit. The switch can be used to control the controlled electrical component and the normally closed relay at the same time. The collector pin on the normally closed relay is electrically connected to the microchip.

2. The low power consumption relay circuit according to claim 1, characterized in that: The power supply is a DC regulated power supply.

3. The low power consumption relay circuit according to claim 2, characterized in that: The power supply is also connected in parallel with a rectifier circuit.

4. The low power consumption relay circuit according to claim 2 or 3, characterized in that: A three-terminal voltage regulator is also connected in series between the coil power supply pin on the normally closed relay and the controlled circuit.

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