CN210225291U

CN210225291U - Switching circuit of three-gear alternating current motor

Info

Publication number: CN210225291U
Application number: CN201920678768.2U
Authority: CN
Inventors: Kebin Hu; 胡科斌; Linhui Xiao; 肖林辉
Original assignee: Chinabest Home Appliances Co Ltd
Current assignee: Chinabest Home Appliances Co Ltd
Priority date: 2019-05-10
Filing date: 2019-05-10
Publication date: 2020-03-31
Anticipated expiration: 2029-05-10

Abstract

The utility model discloses a three-gear alternating current motor's switch circuit_，It has adopted two single-pole double-throw relays and 1 single-pole single-throw relay, has realized the three-gear control to three-gear AC motor, and at a certain moment, when the coil of a certain relay gets electric attraction, the AC input interface corresponds the fender position through the switch of this relay and three-gear AC motor and puts through, and three-gear AC motor gets electric operation at this fender position, and when same moment, when the coil of two or 3 relays gets electric, receive the influence of the concrete switch interconnecting link of this case, and only a switch circuit is put through between 3 fender positions of AC input interface and three-gear AC motor also, so, at any time, three-gear AC motor is not put throughThe situation that two gear circuits are simultaneously electrified to burn out a coil of the motor can occur, and the motor is safe, reliable and good in practicability.

Description

Switching circuit of three-gear alternating current motor

[ technical field ] A method for producing a semiconductor device

The utility model relates to a three-gear alternating current motor's switch circuit.

[ background of the invention ]

In the existing cigarette machine on the market, the gear control of the three-gear alternating current motor mainly adopts control circuit board control, the control circuit board controls the connection and disconnection of corresponding gear switches through programs, in practice, when two gear circuits are connected on the three-gear alternating current motor at the same time, a motor coil is easy to burn out, so that in order to ensure that only one gear circuit is connected on the three-gear alternating current motor at the same time, all the gear switches are disconnected firstly when the control circuit board performs gear switching control every time, then a certain gear switch is controlled to be connected, and the control is troublesome; in addition, when the program of the control circuit board is wrong, the risk that two gear circuits are switched on simultaneously exists.

Therefore, how to overcome the above-mentioned drawbacks has become an important issue to be solved by those skilled in the art.

[ Utility model ] content

The utility model overcomes above-mentioned technique is not enough, provides a three-gear alternating current motor's switch circuit.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a switch circuit of a three-gear alternating current motor comprises an alternating current input interface 1, a three-gear alternating current motor 2, a first single-pole double-throw controlled relay REL1, a second single-pole double-throw controlled relay REL2 and a third single-pole single-throw normally-open controlled relay REL3, wherein a connecting end of the alternating current input interface 1 is electrically connected with a first gear connecting end of the three-gear alternating current motor 2 after sequentially passing through a moving contact and a normally closed stationary contact of the first single-pole double-throw controlled relay REL1, a moving contact and a normally closed stationary contact of the second single-pole double-throw controlled relay REL2 and a normally open switch of the third single-pole single-throw normally-open controlled relay REL3, a normally open stationary contact of the second single-pole double-throw controlled relay REL2 is electrically connected with a second gear connecting end of the three-gear alternating current motor 2, a normally open stationary contact of the first single-pole double-throw controlled relay REL1 is electrically connected with a third connecting end of the three-gear alternating current motor 2, the other connecting end of the alternating current input interface 1 is electrically connected with the other power input end of the three-gear alternating current motor 2.

The switching circuit of the three-gear alternating current motor further comprises a control circuit board 3 for controlling the actions of the first single-pole double-throw controlled relay REL1, the second single-pole double-throw controlled relay REL2 and the third single-pole single-throw normally-open controlled relay REL 3.

In the switching circuit of the three-gear ac motor, one end of the coil of the first single-pole double-throw controlled relay REL1, one end of the coil of the second single-pole double-throw controlled relay REL2, and one end of the coil of the third single-pole single-throw normally-open controlled relay REL3 are connected to a 12V dc voltage, and the other end of the coil of the first single-pole double-throw controlled relay REL1, the other end of the coil of the second single-pole double-throw controlled relay REL2, and the other end of the coil of the third single-pole single-throw normally-open controlled relay REL3 are electrically connected to the control circuit board 3, respectively.

According to the switching circuit of the three-gear alternating current motor, the three-gear alternating current motor 2 is an air draft motor on a cigarette machine.

Compared with the prior art, the beneficial effects of the utility model are that:

the switching circuit of the three-gear alternating current motor has simple and easy-to-realize structure, two single-pole double-throw relays and 1 single-pole single-throw relay are adopted, the three-gear control of the three-gear alternating current motor is realized, and at a certain moment, when the coil of a relay is electrified and attracted, the alternating current input interface is switched on with the corresponding gear on the three-gear alternating current motor through the switch of the relay, the three-gear alternating current motor is electrified to operate in the gear, when coils of two or 3 relays are electrified at the same time, only one switching circuit is switched on between the alternating current input interface and 3 gears of the three-gear alternating current motor under the influence of a specific switch connecting circuit of the scheme, so that the three-gear alternating current motor has the advantages of simple structure, low cost and high reliability, at any time, the three-gear alternating current motor cannot be burnt out due to the fact that two gear circuits are powered simultaneously, and is safe, reliable and good in practicability.

[ description of the drawings ]

Fig. 1 is a circuit diagram of the present case.

[ detailed description ] embodiments

The features of the present invention and other related features are described in further detail below by way of examples to facilitate understanding by those skilled in the art:

as shown in fig. 1, a switching circuit of a three-gear ac motor includes an ac input interface 1, a three-gear ac motor 2, a first single-pole double-throw controlled relay REL1, a second single-pole double-throw controlled relay REL2, and a third single-pole single-throw normally-open controlled relay REL3, a connection end of the ac input interface 1 is electrically connected to a first gear connection end of the three-gear ac motor 2 after passing through a moving contact and a normally-closed stationary contact of the first single-pole double-throw controlled relay REL1, a moving contact and a normally-closed stationary contact of the second single-pole double-throw controlled relay REL2, and a normally-open switch of the third single-pole single-throw normally-open controlled relay REL3 in sequence, a normally-open contact of the second single-pole double-throw controlled relay REL2 is electrically connected to a second gear connection end of the three-gear ac motor 2, a normally-open contact of the first single-pole double-throw controlled relay REL1 is electrically connected to a third gear connection end of the three-gear ac motor 2, the other connecting end of the alternating current input interface 1 is electrically connected with the other power input end of the three-gear alternating current motor 2.

As mentioned above, the switching circuit of the three-gear ac motor of the present invention is simple and easy to implement, and it uses two single-pole double-throw relays and 1 single-pole single-throw relay, so as to implement the three-gear control of the three-gear ac motor 2, at a certain time, when the coil of a relay is electrified and attracted, the ac input interface 1 is connected with the corresponding gear on the three-gear ac motor 2 through the switch of the relay, the three-gear ac motor 2 is electrified and operated in the gear, and when the coil of two or 3 relays is electrified at the same time, under the influence of the specific switch connection circuit of the present case, only one switch circuit is connected between the ac input interface 1 and 3 gears of the three-gear ac motor 2, so that, at any time, the three-gear ac motor 2 will not have two gear circuits electrified simultaneously, which may cause the motor coil to be burnt out, it is safe and reliable, and the practicality is good.

As described above, in the specific implementation, the relay further includes the control circuit board 3 for controlling the operations of the first single-pole double-throw controlled relay REL1, the second single-pole double-throw controlled relay REL2, and the third single-pole single-throw normally-open controlled relay REL3, so that the relays can be conveniently controlled.

As described above, in specific implementation, one end of the coil of the first single-pole double-throw controlled relay REL1, one end of the coil of the second single-pole double-throw controlled relay REL2, and one end of the coil of the third single-pole single-throw normally-open controlled relay REL3 are connected to a 12V dc voltage, and the other end of the coil of the first single-pole double-throw controlled relay REL1, the other end of the coil of the second single-pole double-throw controlled relay REL2, and the other end of the coil of the third single-pole single-throw normally-open controlled relay REL3 are electrically connected to the control circuit board 3, respectively.

As mentioned above, in specific implementation, the three-gear ac motor 2 is an air suction motor on a range hood.

As described above, the present disclosure is directed to a switching circuit of a three-gear ac motor, and all technical solutions having the same or similar structure to the present disclosure should be considered to fall within the scope of the present disclosure.

Claims

1. A switching circuit of a three-gear alternating current motor is characterized by comprising an alternating current input interface (1), a three-gear alternating current motor (2), a first single-pole double-throw controlled relay (REL1), a second single-pole double-throw controlled relay (REL2) and a third single-pole single-throw normally-open controlled relay (REL3), wherein a connecting end of the alternating current input interface (1) is electrically connected with a first connecting end of the three-gear alternating current motor (2) through a movable contact and a normally-closed stationary contact of the first single-pole double-throw controlled relay (REL1), a movable contact and a normally-closed stationary contact of the second single-pole double-throw controlled relay (REL2), a normally-open switch of the third single-pole single-throw controlled relay (REL3) in sequence, and a normally-open stationary contact of the second single-pole double-throw controlled relay (REL2) is electrically connected with a second connecting end of the three-gear alternating current motor (2), the normally open static contact of the first single-pole double-throw controlled relay (REL1) is electrically connected with the third gear connecting end of the three-gear alternating current motor (2), and the other connecting end of the alternating current input interface (1) is electrically connected with the other power supply input end of the three-gear alternating current motor (2).

2. The switch circuit of a three-gear alternating current motor according to claim 1, characterized in that the switch circuit further comprises a control circuit board (3) for controlling the action of the first single-pole double-throw controlled relay (REL1), the second single-pole double-throw controlled relay (REL2) and the third single-pole single-throw normally-open controlled relay (REL 3).

3. The switching circuit of a three-gear alternating current motor according to claim 2, wherein one end of the coil of the first single-pole double-throw controlled relay (REL1), one end of the coil of the second single-pole double-throw controlled relay (REL2), and one end of the coil of the third single-pole single-throw normally-open controlled relay (REL3) are connected to a 12V dc voltage, and the other end of the coil of the first single-pole double-throw controlled relay (REL1), the other end of the coil of the second single-pole double-throw controlled relay (REL2), and the other end of the coil of the third single-pole single-throw normally-open controlled relay (REL3) are electrically connected to the control circuit board (3), respectively.

4. A switching circuit of a three-position ac motor according to any of claims 1-3, characterized in that the three-position ac motor (2) is a suction motor on a range hood.