CN214477200U

CN214477200U - Circuit for reducing power consumption of relay coil

Info

Publication number: CN214477200U
Application number: CN202120532598.4U
Authority: CN
Inventors: 孙钰洲; 杨恩飞; 高兆华
Original assignee: Shandong Feiyue Electronics Technology Co ltd
Current assignee: Shandong Feiyue Electronics Technology Co ltd
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2021-10-22
Anticipated expiration: 2031-03-15

Abstract

The utility model provides a circuit of reduction relay coil consumption, the triode switches on the back, and the coil of relay just establishes ties with this RC circuit, just can be so that the relay coil remains stable closed, practices thrift the consumption, even driving voltage reduces, can not influence the relay and normally work yet. The emitter of the triode is normally grounded, an RC circuit is connected between the emitter and the ground in series, and when the triode is turned off, the resistor IV ensures the capacitor to discharge; when the triode is conducted, the polar capacitor is charged, namely short circuit occurs, the maximum current passes through the relay, and the relay is kept closed. The polar capacitor is fully charged and is equivalent to an open circuit, when the voltage and the current of the relay coil are transferred to the resistor IV, the voltage and the current are limited by the resistor IV, and the voltage and the current of the circuit are reduced, so that the aim of reducing power consumption is fulfilled.

Description

Circuit for reducing power consumption of relay coil

Technical Field

The utility model relates to a relay control technical field, concretely relates to reduce circuit of relay coil consumption.

Background

An electromagnetic relay generally includes an iron core, a coil, an armature, a contact spring, and the like. As long as a certain voltage is applied to the two ends of the coil, a certain current flows in the coil, so that an electromagnetic effect is generated, the armature iron overcomes the pulling force of the return spring and is attracted to the iron core under the attraction effect of the electromagnetic force, and the movable contact of the armature iron is driven to be attracted with the fixed contact (normally open contact). When the coil is powered off, the electromagnetic force disappears, and the armature returns to the original position under the counterforce of the spring, so that the movable contact and the original static contact (normally closed contact) are released. When current passes through the coil, the coil has a certain resistance value, so that the current can consume certain energy on the coil when passing through the coil, serious heat is generated and the relay can be even burnt out. In view of this, there is a need to find a solution that reduces the power consumption of the coil while allowing the relay to operate reliably.

Disclosure of Invention

The utility model discloses an overcome not enough of above technique, provide a circuit that can reduce relay coil consumption and can make the relay reliable work again.

The utility model overcomes the technical scheme that its technical problem adopted is:

a circuit for reducing power consumption of a relay coil, comprising:

the photoelectric coupler comprises a 3V power supply, a capacitor and a main control chip, wherein a pin 1 of the photoelectric coupler is respectively connected with the 3V power supply and grounded through the capacitor, and a pin 2 of the photoelectric coupler is connected with the main control chip through a resistor I;

the triode, its collector connects to the positive pole of the diode, the negative pole of the diode connects to 12V power and 4 base pins of the photoelectric coupler, its base connects to 3 base pins of the photoelectric coupler and grounds through the resistance III through the resistance II separately, its emitter connects to the positive pole with polar capacitance separately and grounds through the negative pole of the resistance IV, ground; and

and one end of a coil of the relay is connected to the anode of the diode, and the other end of the coil of the relay is connected to the cathode of the diode.

Further, the main control chip is a single chip microcomputer.

Further, the main control chip is an FPGA chip.

Further, the triode is an NPN type triode.

Further, the single chip microcomputer is an STM32 type single chip microcomputer.

Furthermore, the triode is an 8050 type triode or a 9014 type triode.

The utility model has the advantages that: after the triode is conducted, the coil of the relay is connected with the RC circuit in series, so that the coil of the relay can be stably closed, power consumption is saved, and normal work of the relay cannot be influenced even if the driving voltage is reduced. The emitter of the triode is normally grounded, an RC circuit is connected between the emitter and the ground in series, and when the triode is turned off, the resistor IV ensures the capacitor to discharge; when the triode is conducted, the polar capacitor is charged, namely short circuit occurs, the maximum current passes through the relay, and the relay is kept closed. The polar capacitor is fully charged and is equivalent to an open circuit, when the voltage and the current of the relay coil are transferred to the resistor IV, the voltage and the current are limited by the resistor IV, and the voltage and the current of the circuit are reduced, so that the aim of reducing power consumption is fulfilled.

Drawings

Fig. 1 is a schematic diagram of the circuit structure of the present invention;

in the figure, 1, a main control chip 2, a resistor I3, a capacitor 4, a photoelectric coupler 5, a resistor II 6, a resistor III 7, a diode 8, a triode 9, a polar capacitor 10, a resistor IV 11 and a relay.

Detailed Description

The present invention will be further explained with reference to fig. 1.

A circuit for reducing power consumption of a relay coil, comprising: a photoelectric coupler 4, wherein pins 1 of the photoelectric coupler are respectively connected with a 3V power supply and grounded through a capacitor 3, and pins 2 of the photoelectric coupler are connected with a main control chip 1 through a resistor I2; a triode 8, the collector of which is connected with the anode of a diode 7, the cathode of the diode 7 is connected with a 12V power supply and the 4 pin of the photoelectric coupler 4, the base of which is respectively connected with the 3 pin of the photoelectric coupler 4 through a resistor II 5 and is grounded through a resistor III 6, the emitter of which is respectively connected with the anode of a polar capacitor 9 and is grounded through a resistor IV 10, and the cathode of the polar capacitor 9 is grounded; and a relay 11, one end of a coil of the relay 11 being connected to the anode of the diode 7, and the other end thereof being connected to the cathode of the diode 7. The opto-coupler 4 isolates the 3.3V dc voltage supplying it from the 12V supplying the relay 11 to prevent two different voltage levels from affecting the operation of the circuit. The capacitor 3 is used for filtering ripples in the direct current voltage 3.3V, the resistor I2 is used for limiting current and protecting an I/O port of the main control chip, and the resistor II 5 can limit current and also can provide a proper bias current for the triode 8, so that the triode Q1 is normally switched on and switched off. The resistor III 6 can prevent the triode 8 from generating false operation under the influence of noise signals, so that the triode is cut off more reliably. The resistor IV and the polar capacitor 9 are connected in parallel to form an RC circuit for reducing the power consumption of the coil of the relay 11, and the resistance value of the resistor IV is preferably twice of the resistance value of the coil of the relay 11. After the triode 8 is conducted, the coil of the relay 11 is connected with the RC circuit in series, so that the coil of the relay 11 can be stably closed, power consumption is saved, and normal work of the relay cannot be influenced even if driving voltage is reduced. The emitter of the triode 8 is normally grounded, an RC circuit is connected between the emitter and the ground in series, and when the triode 8 is turned off, the resistor IV 10 ensures the capacitor to discharge; when the transistor 8 is switched on, the capacitor 9 with polarity is charged, which corresponds to a short circuit, allowing the maximum current to pass through the relay 11 and keeping the relay closed. The polar capacitor 9 is fully charged, which is equivalent to open circuit, when the voltage and current of the coil of the relay 11 are transferred to the resistor IV 10, the voltage and current are limited by the resistor IV 10, and the voltage and current of the circuit become small, so that the purpose of reducing power consumption is achieved.

Preferably, the main control chip 1 is a single chip microcomputer. The main control chip 1 may also be an FPGA chip. The single chip microcomputer is an STM32 type single chip microcomputer.

Preferably, the transistor 8 is an NPN transistor. The triode 8 is an 8050 type triode or a 9014 type triode.

Claims

1. A circuit for reducing power consumption of a relay coil, comprising:

the photoelectric coupler (4) is characterized in that pins 1 of the photoelectric coupler are respectively connected with a 3V power supply and grounded through a capacitor (3), and pins 2 of the photoelectric coupler are connected with the main control chip (1) through a resistor I (2);

a triode (8), the collector of which is connected with the anode of a diode (7), the cathode of the diode (7) is connected with a 12V power supply and the 4 pin of the photoelectric coupler (4), the base of which is respectively connected with the 3 pin of the photoelectric coupler (4) through a resistor II (5) and is grounded through a resistor III (6), the emitter of which is respectively connected with the anode of a polar capacitor (9) and is grounded through a resistor IV (10), and the cathode of the polar capacitor (9) is grounded; and

and one end of a coil of the relay (11) is connected to the anode of the diode (7), and the other end of the coil of the relay (11) is connected to the cathode of the diode (7).

2. The circuit for reducing the power consumption of a relay coil of claim 1, wherein: the main control chip (1) is a single chip microcomputer.

3. A circuit for reducing power consumption of a relay coil according to claim 1, wherein: the main control chip (1) is an FPGA chip.

4. A circuit for reducing power consumption of a relay coil according to claim 1, wherein: the triode (8) is an NPN type triode.

5. A circuit for reducing power consumption of a relay coil according to claim 2, wherein: the singlechip is an STM32 type singlechip.

6. A circuit for reducing power consumption of a relay coil according to claim 4, wherein: the triode (8) is an 8050 type triode or a 9014 type triode.