CN210693815U

CN210693815U - Simple speed regulation circuit for motor

Info

Publication number: CN210693815U
Application number: CN201922147247.7U
Authority: CN
Inventors: 胡永生; 魏世忠
Original assignee: Shenzhen Yuanli Operation Control Technology Co Ltd
Current assignee: Shenzhen Yuanli Operation Control Technology Co Ltd
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-06-05
Anticipated expiration: 2029-12-04

Abstract

The utility model belongs to the technical field of the motor drive technique and specifically relates to a simple and easy speed governing circuit for motor, including NE555 integrated circuit, adjustable resistance, solid state relay and bidirectional thyristor, the motor is through bidirectional thyristor VTH ground connection, and bidirectional thyristor's the output that solid state relay is connected to the trigger pin, solid state relay's input is connected with NE555 integrated circuit's output, NE555 integrated circuit's input is used for generating DC12V voltage for its power supply through rectification step-down circuit generation by 220V alternating current commercial power, change NE555 integrated circuit output pulse signal's duty cycle through adjustable resistance, thereby change the operating voltage of motor, the rotational speed, circuit structure is simple, and compare and adopt single chip microcomputer control motor rotational speed among the prior art, do not relate to the program programming, more do benefit to the maintenance of a ray of maintenance personal to the motor.

Description

Simple speed regulation circuit for motor

Technical Field

The utility model belongs to the technical field of motor drive, especially, relate to a simple and easy speed governing circuit for motor.

Background

The AC motor has simple structure, reliable operation, low cost and convenient maintenance, so that it has wide application range, and almost all speed-regulating transmission adopts AC motor, and the AC motor is generally only started, braked, forward-reverse rotation controlled and sequence controlled by means of relay, programmable device and switch element. However, with the advance of modern pace, people have higher and higher demand for automation, so that the complex control of the motor gradually becomes the mainstream, and the ac speed regulation control has a quite obvious effect as a means for controlling the motor.

The control of the rotating speed of the motor through the single chip microcomputer is a conventional means in the field, the purpose of controlling the rotating speed is achieved mainly through single program change, but the overhauling difficulty is increased for a first-line maintenance worker, the first-line maintenance worker is only familiar with common electrical elements as a common electrician after all, the programming understanding is little, the problem of the motor cannot be solved, and the motor needs to be returned to a factory.

SUMMERY OF THE UTILITY MODEL

To prior art's not enough, this utility model provides a simple and easy speed governing circuit for motor adopts electrician's commonly used NE555 integrated circuit control motor rotational speed, does not relate to software programming, makes the circuit design of motor simpler, and a ray of maintenance of being convenient for.

In order to achieve the above purpose, the utility model provides a simple speed regulating circuit for a motor, which comprises an NE555 integrated circuit, an adjustable resistor, a solid state relay and a bidirectional thyristor, wherein the positive pole of the motor is connected with 220V alternating current commercial power, the negative pole of the motor is grounded through the bidirectional controllable silicon, and the trigger pin of the bidirectional thyristor is connected with the output end of the solid state relay, the cathode of the input end of the solid state relay is directly grounded, the anode of the input end of the solid state relay is connected with the output pin of the NE555 integrated circuit, the 220V alternating current commercial power is connected with the input pin of the NE555 integrated circuit through the rectification voltage reduction circuit, the rectification voltage-reducing circuit comprises a voltage-reducing capacitor, a rectification diode and a voltage-stabilizing diode which are sequentially connected with 220V alternating current commercial power and are used for generating DC12V voltage to be connected to an input pin of an NE555 integrated circuit, and the input pin of the NE555 integrated circuit is connected into the trigger pin of the NE555 integrated circuit through the adjustable resistor.

As a further improvement of the simple speed regulation circuit for the motor, the threshold pin of the NE555 integrated circuit is shorted together with the trigger pin and grounded via the filter capacitor.

As a further improvement of the simple speed regulation circuit for the motor, the two sides of the adjustable resistor are respectively connected with the telling switch diode with the model number of IN 4148.

As the utility model relates to a further improvement of simple and easy speed governing circuit for motor, rectification step-down circuit adopts 0.47 uFd's step-down electric capacity, and rectifier diode's model is IN 4007.

As a further improvement of the simple speed regulation circuit for the motor of the present invention, the model of the solid-state relay is SP 2110.

The utility model discloses a beneficial effect of a simple and easy speed governing circuit for motor through electrician's commonly used NE555 integrated circuit, combines adjustable resistance, solid state relay and bidirectional thyristor to control the rotational speed of motor, and circuit structure is simpler to compare and adopt single chip microcomputer control motor rotational speed among the prior art, not relate to the program, more do benefit to the maintenance of a ray of maintenance personal to the motor.

Drawings

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

in the figure: 1. a rectification step-down circuit.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a simple and easy speed governing circuit for motor, including NE555 integrated circuit, adjustable resistance RP, solid state relay KN and bidirectional thyristor VTH, it is specific, as shown in the specification attached figure 1, 220V exchanges the commercial power and passes through third electric capacity C3, third diode VD3 and zener diode ZD ground connection in proper order, and third electric capacity C3 connects first resistance R1 in parallel, zener diode ZD connects first electric capacity C1 in parallel, first electric capacity C1 is used for filtering, then third electric capacity C3, third diode VD3, zener diode ZD, first resistance R1, first resistance R1 constitute step-down rectifier circuit; wherein a fourth pin, namely a reset pin and an eighth pin, namely a power supply pin, of the NE555 integrated circuit are connected between a third diode VD3 and a voltage stabilizing diode ZD, a seventh pin, namely a discharge pin, of the NE555 integrated circuit is connected between the third diode VD3 and the voltage stabilizing diode ZD through a second resistor R2, a loop which is sequentially composed of a first diode VD1, an adjustable resistor RP, a second diode VD2 and a third resistor R3 is connected between the seventh pin and a second resistor R2 of the NE555 integrated circuit, a slide sheet of the adjustable resistor RP is connected with a second pin, namely a trigger pin, of the NE555 integrated circuit through a fourth resistor R4, the trigger pin of the NE555 integrated circuit is mutually short-circuited with a sixth pin, namely a threshold pin, meanwhile, a second capacitor C2 is grounded, a fifth pin, namely a control voltage pin of the NE555 integrated circuit is idle-connected, a third pin, namely an output pin, of the NE555 integrated circuit is connected with an anode of an input end of a solid state relay KN 6 through a sixth resistor R6, the input negative pole ground connection of solid-state relay KN, an output ground connection of solid-state relay KN, another output of solid-state relay KN is connected with bidirectional thyristor VTH's trigger pin through fifth resistance R, and wherein motor M one end inserts 220V and exchanges the commercial power, and the other end is through bidirectional thyristor VTH ground connection.

The 220V ac mains supply is firstly reduced IN voltage by a third capacitor C3 of 0.47uF, then passes through a third diode VD3 of the IN4007 type, and finally is stabilized by a voltage stabilizing diode ZD to generate a +12V dc voltage, which provides a working voltage for the NE555 integrated circuit, after the NE555 integrated circuit works, an ultra-low frequency pulse signal with a frequency of about 1Hz is output from a third pin thereof, the pulse signal is applied to a control end (positive electrode of an input end) of the solid-state relay KN, and by controlling on and off of the solid-state relay KN, specifically, the solid-state relay KN is turned on when the pulse signal is a positive pulse, and the solid-state relay KN is turned off when the pulse signal is a negative pulse, so as to control the conduction angle of the triac VTH, and adjust the resistance value of the adjustable resistor RP, so as to change the duty ratio of the pulse signal output from the third pin of the NE555 integrated circuit, the duty ratio of the pulse signal is larger, and the longer the, the higher the operating voltage of the motor M, the faster the running speed.

The circuit does not relate to the programming of a singlechip program, so that the circuit structure is clearer and simpler for a front-line maintainer, and the circuit is convenient to learn and overhaul.

Preferably, the first diode VD1 and the second diode VD2 are high-speed switching diodes with model number IN4148, the signal of the solid-state relay KN is SP2110, and a 10A/800V triac VTH is used.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent changes without departing from the technical scope of the present invention.

Claims

1. The utility model provides a simple and easy speed governing circuit for motor which characterized in that: the circuit comprises an NE555 integrated circuit, an adjustable resistor, a solid-state relay and a bidirectional thyristor, wherein the positive pole of a motor is connected with 220V alternating current mains supply, the negative pole of the motor is grounded through the bidirectional thyristor, a trigger pin of the bidirectional thyristor is connected with the output end of the solid-state relay, the negative pole of the input end of the solid-state relay is directly grounded, the positive pole of the input end of the solid-state relay is connected with an output pin of the NE555 integrated circuit, the 220V alternating current mains supply is connected with an input pin of the NE555 integrated circuit through a rectification voltage reduction circuit, the rectification voltage reduction circuit comprises a voltage reduction capacitor, a rectifier diode and a voltage stabilizing diode which are sequentially connected with the 220V alternating current mains supply, the voltage reduction capacitor, the rectifier diode and the voltage stabilizing diode are used for generating DC12V voltage to be connected with.

2. A simple speed control circuit for an electric motor according to claim 1, wherein: the threshold pin and the trigger pin of the NE555 integrated circuit are connected together in a short circuit and grounded through a filter capacitor.

3. A simple speed control circuit for an electric motor according to claim 1, wherein: and two sides of the adjustable resistor are respectively connected with a high-speed switching diode with the model number of IN 4148.

4. A simple speed control circuit for an electric motor according to claim 1, wherein: the rectification step-down circuit adopts a step-down capacitor of 0.47uFd, and the model of a rectification diode is IN 4007.

5. A simple speed control circuit for an electric motor according to claim 1, wherein: the model number of the solid-state relay is SP 2110.