CN210325640U

CN210325640U - Circuit control structure of double coils of relay

Info

Publication number: CN210325640U
Application number: CN201921159864.2U
Authority: CN
Inventors: 唐俊平
Original assignee: Sanyou Corp Ltd
Current assignee: Sanyou Corp Ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-04-14
Anticipated expiration: 2029-07-22

Abstract

The utility model relates to the technical field of relays, in particular to a circuit control structure of a double-coil relay, which comprises an electromagnet assembly and a control assembly, wherein the electromagnet assembly comprises a starting coil and a holding coil, the resistance value of the starting coil is smaller than that of the holding coil, the starting coil and the holding coil are arranged in parallel, and the control assembly is used for regulating and controlling the connection or disconnection of the starting coil and a power supply source; when the relay starts to work, the control assembly controls the starting coil to be conducted with the power supply source, the starting coil and the holding coil are arranged in parallel, the equivalent resistance values of the two coils are reduced, the starting power of the relay is increased, strong magnetic attraction is generated, the response efficiency of the relay is improved, and the large-stroke design is met; after the relay is attracted, the control assembly opens the movable coil and the power supply source, the holding coil carries out current limiting, and the holding coil only needs low power to keep the relay in an attraction state, so that the purpose of saving electric energy is achieved.

Description

Circuit control structure of double coils of relay

Technical Field

The utility model relates to a relay technical field especially discloses a circuit control structure of relay twin coil.

Background

The electromagnetic relay is one of common accessories of various intelligent control equipment, and in the use process of the electromagnetic relay, on one hand, the size of the electromagnetic relay is required to be smaller and smaller, and on the other hand, the electromagnetic relay is required to have a large stroke design so as to meet the safety required by circuit isolation; the small-power drive for the electromagnetic relay cannot meet the design requirement of the large stroke of the electromagnetic relay, and the safety of circuit partition of the small-stroke electromagnetic relay cannot be fully ensured.

SUMMERY OF THE UTILITY MODEL

In order to overcome the shortcoming and the deficiency that exist among the prior art, the utility model aims to provide a circuit control structure of relay twin coil promotes electromagnetic relay's response efficiency and satisfies the large stroke design, only needs the miniwatt can make electromagnetic relay keep at the actuation state, realizes the purpose of practicing thrift the electric energy.

In order to achieve the above object, the utility model discloses a circuit control structure of relay twin coil, including electromagnet assembly and control assembly, electromagnet assembly includes start coil and holding coil, and start coil's resistance value is less than holding coil's resistance value, and start coil and the parallelly connected setting of holding coil, external power supply source are used for to start coil and holding coil power supply, and control assembly is used for regulating and controlling switching on or breaking off of start coil and power supply source.

Preferably, the electromagnet assembly further comprises an insulating framework and an iron core arranged in the insulating framework, the insulating framework is provided with an annular blind groove, the annular blind groove is arranged around the iron core, the starting coil and the holding coil are all sleeved outside the insulating framework and located in the annular blind groove, the holding coil is sleeved outside the starting coil, and the starting coil and the holding coil are arranged around the iron core.

Preferably, the control assembly includes an insulator, a control circuit board and a fixing screw, the fixing screw is used for fixing the control circuit board on the insulator, the insulator is provided with a containing blind slot for containing the control circuit board, and the control circuit board is used for regulating and controlling the connection or disconnection between the starting coil and the power supply.

Preferably, the control circuit board is provided with a first circuit, the first circuit includes a first resistor, a second resistor, a first diode, a second diode and a first MOS transistor, the first resistor and the first MOS transistor are arranged in series, a power supply source supplies power to the holding coil through the first resistor and the first MOS transistor, the second resistor and the second diode are arranged in parallel, a conduction position between the first resistor and the first MOS transistor is conducted with a cathode of the second diode, an anode of the second diode is grounded, the first diode and the first MOS transistor are arranged in parallel, an anode of the first diode is grounded, and a cathode of the first diode and a conduction position of the first MOS transistor are conducted with the holding coil.

Preferably, the control circuit board is provided with a second circuit, the second circuit includes a third resistor, a fourth resistor, a third diode, a first capacitor, and a second MOS transistor, the third resistor, the fourth resistor, the first capacitor, and the second MOS transistor are connected in series to form a main circuit, the power supply supplies power to the start coil through the main circuit, a conduction position between the third resistor and the first capacitor is conducted with a cathode of the third diode, an anode of the third diode is grounded, and the second MOS transistor is grounded.

Preferably, the second circuit further includes a fifth resistor, a second capacitor, and a fourth diode, the fourth diode is connected in parallel with the fifth resistor, the second capacitor is connected in parallel with the fourth diode, a conduction position between the fourth resistor and the second MOS transistor is conducted with a negative electrode of the fourth diode, and a positive electrode of the fourth diode is grounded.

Preferably, the control circuit board further includes a third circuit, the third circuit includes a fifth diode and a voltage dependent resistor, the anode of the power supply is conducted with the fifth diode, the cathode of the fifth diode is conducted with the start coil and the hold coil, and the voltage dependent resistor is conducted with the anode of the power supply and the cathode of the power supply.

The utility model has the advantages that: when the relay starts to work, the control assembly controls the starting coil to be conducted with the power supply source, the starting coil and the holding coil are arranged in parallel, the equivalent resistance values of the two coils are reduced, the starting power of the relay is increased, strong magnetic attraction is generated, the response efficiency of the relay is improved, and the large-stroke design is met; after the relay is attracted, the control assembly opens the movable coil and the power supply source, the holding coil carries out current limiting, and the holding coil only needs low power to keep the relay in an attraction state, so that the purpose of saving electric energy is achieved.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic view of the exploded structure of the present invention;

fig. 3 is a circuit diagram of a first circuit of the present invention;

fig. 4 is a circuit diagram of a second circuit of the present invention;

fig. 5 is a circuit diagram of a third circuit according to the present invention.

The reference numerals include:

1-electromagnet assembly 2-control assembly 3-starting coil

4-holding coil 5-insulating framework 6-iron core

7-annular blind groove 8-insulator 9-control circuit board

11-fixing screws 12-accommodating blind grooves.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and accompanying drawings, which are not intended to limit the present invention.

Please refer to fig. 1 to 2, the utility model discloses a circuit control structure of double coil of relay, including electromagnet assembly 1 and control assembly 2, electromagnet assembly 1 is used for providing drive power, control assembly 2 is used for regulating and control electromagnet assembly 1's drive power size, electromagnet assembly 1 includes starting coil 3 and holding coil 4, starting coil 3's resistance value is less than holding coil 4's resistance value, preferably, holding coil 4's resistance value is 10-1000 times starting coil 3's resistance value, starting coil 3 and holding coil 4 parallel arrangement, external power supply is used for supplying power to starting coil 3 and holding coil 4, control assembly 2 is used for regulating and controlling the switching on or the disconnection of starting coil 3 and power supply.

When the relay starts to work, the control assembly 2 controls the starting coil 3 to be conducted with a power supply source, the starting coil 3 and the holding coil 4 are arranged in parallel, so that the equivalent resistance values of the two coils are greatly reduced, the starting power of the relay is greatly increased under the condition that the voltage value applied by the power supply source is not changed, the electromagnet assembly 1 generates strong magnetic attraction, the armature of the relay is driven by the strong magnetic attraction to move quickly and remotely, the response efficiency of the relay is improved, and the large-stroke design is met; when the relay is attracted, the control component 2 disconnects the starting coil 3 and the power supply source, only the holding coil 4 is conducted with the power supply source at the moment, the current in the circuit is limited by means of the large resistance characteristic of the holding coil 4, the current of the circuit is greatly reduced, and therefore the holding coil 4 only needs small power to enable the relay to be kept in an attraction state, and the purpose of saving electric energy is achieved.

The electromagnet assembly 1 further comprises an insulating framework 5 and an iron core 6 arranged in the insulating framework 5, the insulating framework 5 is made of insulating plastics, an annular blind groove 7 is formed in the insulating framework 5, the annular blind groove 7 is formed by the concave arrangement of the outer surface of the insulating framework 5, the annular blind groove 7 is arranged around the iron core 6, the starting coil 3 and the holding coil 4 are both sleeved outside the insulating framework 5 and located in the annular blind groove 7, the coils are blocked by utilizing the abutting of the inner side walls of the two sides of the annular blind groove 7, the coils are prevented from moving along the axial direction of the insulating framework 5, the holding coil 4 is sleeved outside the starting coil 3, the size of the occupied space of the electromagnet assembly 1 is reduced, and the starting coil 3 and the holding coil 4 are both arranged around the iron core 6.

The control assembly 2 comprises an insulator 8, a control circuit board 9 and a fixing screw 11, the insulator 8 is made of insulating plastics, the insulator 8 is provided with a positioning column, the electromagnet is provided with a positioning hole used for accommodating the positioning column, and the electromagnet assembly 1 and the control assembly 2 are ensured to be quickly and accurately installed and aligned by means of matching of the positioning column and the positioning hole, so that the assembly efficiency of the relay is improved.

The fixing screws 11 are used to fix the control circuit board 9 to the insulator 8, ensuring that the two are firmly connected together, compared to the control circuit board 9 which is glued to the insulator 8 by glue. The insulator 8 is provided with a containing blind groove 12 for containing the control circuit board 9, the containing blind groove 12 is formed by being concavely arranged on the outer surface of the insulator 8, the control circuit board 9 is protected by utilizing the side wall of the containing blind groove 12, the control circuit board 9 is prevented from being damaged by collision of external objects, and the control circuit board 9 is used for regulating and controlling the connection or disconnection of the starting coil 3 and a power supply.

Referring to fig. 1 to 3, the control circuit board 9 is provided with a first circuit, the first circuit includes a first resistor R1, a second resistor R2, a first diode D1, a second diode D2 and a first MOS transistor Q1, the first resistor R1 is connected in series with the first MOS transistor Q1, a power supply supplies power to the holding coil 4 through the first resistor R1 and the first MOS transistor Q1, the second resistor R2 is connected in parallel with the second diode D2, a conducting portion between the first resistor R1 and the first MOS transistor Q1 is connected to a negative electrode of the second diode D2, an anode of the second diode D2 is grounded, the first diode D1 is connected in parallel with the first MOS transistor Q1, an anode of the first diode D1 is grounded, a negative electrode of the first diode D1, a conducting portion of the first MOS transistor Q1 is connected to the holding coil 4.

The first resistor R1 and the second resistor R2 form a voltage divider circuit to prevent the first MOS transistor Q1 and the holding coil 4 from being damaged due to an excessively high voltage. Through adding second electric capacity C2, realize the voltage stabilization processing to the circuit, ensure that the voltage that is exerted on first MOS pipe Q1 is too high and leads to first MOS pipe Q1 to be burnt out. The first diode D1 is used to absorb the back electromotive force of the holding coil 4 and protect the circuit.

Referring to fig. 1 to 4, the control circuit board 9 is provided with a second circuit, the second circuit includes a third resistor R3, a fourth resistor R4, a third diode D3, a first capacitor C1, a second MOS transistor Q2, the third resistor R3, the fourth resistor R4, the first capacitor C1, and the second MOS transistor Q2 are connected in series to form a main circuit, the power supply supplies power to the start coil 3 through the main circuit, a conducting portion between the third resistor R3 and the first capacitor C1 is conducted with a negative electrode of the third diode D3, an anode of the third diode D3 is grounded, and a second MOS transistor Q2 is grounded.

In the use process of the control circuit, when the starting coil 3 is powered on, the first capacitor C1 is in a charging state, the circuit is in a "on" state, and at this time, the power supply supplies power to the starting coil 3 through the second MOS transistor Q2, so that the starting coil 3 and the holding coil 4 are arranged in parallel. When the first capacitor C1 is charged, the circuit is in an open circuit state, the starting coil 3 is powered off, and the power supply is switched on through the holding coil 4, so that the purpose of saving electric energy is realized.

Through the arrangement of the third diode D3, the voltage stabilization processing of the control circuit is realized, the second MOS tube Q2 is prevented from being broken down due to overhigh voltage of the second circuit, and the service life of the second MOS tube Q2 is prolonged. Through the arrangement of the fourth resistor R4, the current flowing through the second MOS transistor Q2 is controlled, the purpose of current limiting is achieved, the current value of the second circuit is reduced, and the second MOS transistor Q2 is prevented from being damaged due to the fact that the current flowing through the second MOS transistor Q2 is too large.

The second circuit further comprises a fifth resistor R5, a second capacitor C2 and a fourth diode D4, the fourth diode D4 and the fifth resistor R5 are arranged in parallel, the second capacitor C2 and the fourth diode D4 are arranged in parallel, the conducting position between the fourth resistor R4 and the second MOS transistor Q2 is conducted with the cathode of the fourth diode D4, and the anode of the fourth diode D4 is grounded.

Through the arrangement of the second capacitor C2, the voltage stabilizing processing of the circuit is realized, the voltage flowing through the second MOS tube Q2 and the starting coil 3 is ensured to be kept at a preset value, and the starting coil 3 is ensured to have enough power to meet the large-stroke design requirement. Through the arrangement of the fourth diode D4, the discharge processing of the second capacitor C2 is realized, the reverse voltage of the second capacitor C2 during discharge is limited, and the directional voltage of the second capacitor C2 during discharge is prevented from damaging the second MOS transistor Q2. Through the setting of the fifth resistor R5, a load is provided for the discharge of the second capacitor C2, and the use safety of the second circuit is ensured.

Referring to fig. 1 to 5, the control circuit board 9 further includes a third circuit, the third circuit includes a fifth diode D5 and a voltage dependent resistor RV, an anode of the power supply is connected to the fifth diode D5, a cathode of the fifth diode D5 is connected to the start coil 3 and the holding coil 4, and the voltage dependent resistor RV is connected to the anode of the power supply and the cathode of the power supply.

Through additionally arranging the fifth diode D5, reverse connection prevention processing of the control circuit is realized, and the whole circuit is prevented from being burnt out when a power supply source is reversely connected. Through addding piezo-resistor RV, improve relay EMC test effect, promote the performance of relay.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. A circuit control structure of a double coil of a relay is characterized in that: the electromagnetic starting device comprises an electromagnet assembly and a control assembly, wherein the electromagnet assembly comprises a starting coil and a holding coil, the resistance value of the starting coil is smaller than that of the holding coil, the starting coil and the holding coil are arranged in parallel, an external power supply source is used for supplying power to the starting coil and the holding coil, and the control assembly is used for regulating and controlling the connection or disconnection of the starting coil and the power supply source.

2. A relay double-coil circuit control structure according to claim 1, characterized in that: the electromagnet assembly further comprises an insulating framework and an iron core arranged in the insulating framework, the insulating framework is provided with an annular blind groove, the annular blind groove surrounds the iron core, the starting coil and the holding coil are all sleeved on the outer side of the insulating framework and located in the annular blind groove, the holding coil is sleeved on the outer side of the starting coil, and the starting coil and the holding coil are arranged around the iron core.

3. A relay double-coil circuit control structure according to claim 1, characterized in that: the control assembly comprises an insulator, a control circuit board and a fixing screw, the fixing screw is used for fixing the control circuit board on the insulator, the insulator is provided with a containing blind groove used for containing the control circuit board, and the control circuit board is used for regulating and controlling the connection or disconnection of the starting coil and the power supply.

4. A relay double-coil circuit control structure according to claim 3, characterized in that: the control circuit board is provided with a first circuit, the first circuit comprises a first resistor, a second resistor, a first diode, a second diode and a first MOS (metal oxide semiconductor) tube, the first resistor and the first MOS tube are arranged in series, a power supply source supplies power to the holding coil through the first resistor and the first MOS tube, the second resistor and the second diode are arranged in parallel, the conduction position between the first resistor and the first MOS tube is conducted with the negative electrode of the second diode, the positive electrode of the second diode is grounded, the first diode and the first MOS tube are arranged in parallel, the positive electrode of the first diode is grounded, and the negative electrode of the first diode, the conduction position of the first MOS tube and the holding coil are conducted.

5. A relay double-coil circuit control structure according to claim 3, characterized in that: the control circuit board is provided with a second circuit, the second circuit comprises a third resistor, a fourth resistor, a third diode, a first capacitor and a second MOS tube, the third resistor, the fourth resistor, the first capacitor and the second MOS tube are connected in series to form a main circuit, a power supply source supplies power to the starting coil through the main circuit, a conduction position between the third resistor and the first capacitor is conducted with a cathode of the third diode, an anode of the third diode is grounded, and the second MOS tube is grounded.

6. A double-coil circuit control structure of a relay according to claim 5, characterized in that: the second circuit further comprises a fifth resistor, a second capacitor and a fourth diode, the fourth diode is connected with the fifth resistor in parallel, the second capacitor is connected with the fourth diode in parallel, a conducting position between the fourth resistor and the second MOS transistor is conducted with the cathode of the fourth diode, and the anode of the fourth diode is grounded.

7. A relay double-coil circuit control structure according to claim 3, characterized in that: the control circuit board further comprises a third circuit, the third circuit comprises a fifth diode and a piezoresistor, the anode of the power supply source is conducted with the fifth diode, the cathode of the fifth diode is conducted with the starting coil and the holding coil, and the piezoresistor is conducted with the anode of the power supply source and the cathode of the power supply source.