CN201160267Y

CN201160267Y - AC single-phase electric motor speed governing and steadying circuit

Info

Publication number: CN201160267Y
Application number: CNU2007200620688U
Authority: CN
Inventors: 喻菊龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-12-26
Filing date: 2007-12-26
Publication date: 2008-12-03
Anticipated expiration: 2017-12-26

Abstract

The utility model discloses a speed regulation and stabilizing circuit for a single-phase AC motor. The speed regulation and stabilizing circuit comprises a control unit, a rotating speed display circuit, an operating information input circuit and a rotating speed feedback circuit, as well as a power phase sample circuit and a motor executive circuit; the phase signals can be collected by the power phase sample circuit from alternating current power, and then are transmitted to the control unit after being amplified, rectified and filtered; the control unit will output certain duty ratio signals after operation, and then the duty ratio signals are sent to the motor executive circuit so as to control the rotating speed of the motor; the phase signals collected from the alternating current power are delivered to the control unit for operation, and then certain duty ratio signals are output to control the switching of the controlled silicon; by such rotating speed control mode, the volume of the controller is small and the transportation is convenient, moreover, the cost is lower than that of the frequency conversion model; six control buttons for power switch, limit speed and speed regulation are arranged at the operating information input circuit, thereby different speeds of the motor can be realized and different needs can be met.

Description

The governing speed and steady speed controlled circuit of a kind of interchange monophase machine

Technical field

The utility model relates to a kind of motor speed control circuit, is specifically related to exchange the governing speed and steady speed controlled circuit of monophase machine.

Background technology

In the prior art, the method of the speed of adjustment motor commonly used mainly is to adopt change over switch, its principle is to change the voltage that is added on the motor with change over switch, thereby realize the different rotating speeds of motor, this control method is owing to need use transformer, and such Transformer Winding is very big, quality is very heavy, so such controller volume is big, be unfavorable for transportation, raise the cost; When regulating motor speed, method commonly used also has the method for frequency conversion, by the frequency of adjustment alternating current, thereby changes motor speed, but adopts the mode of frequency conversion to change rotating speed of motor, and the cost that needs is too high.

The utility model content

The utility model purpose is: overcome the defective of prior art, provide a kind of with low cost, the governing speed and steady speed controlled circuit of being convenient to transport of interchange monophase machine.

The technical scheme that utility model provides is as follows: the governing speed and steady speed controlled circuit of a kind of interchange monophase machine, include control unit, rotating speed display circuit, control information input circuit, speed feedback circuit, and also comprise power phase sample circuit and motor executive circuit; The power phase sample circuit is by gathering the phase signal in the AC power, through being sent in the described control unit after amplification, rectification, the filtering, described control unit is through computing, and the signal of exporting certain duty ratio sends to described motor executive circuit with the control rotating speed of motor.

As an improvement of the present utility model, described phase sampling circuit comprises transformer, one-level amplifying circuit, the second amplifying circuit that connects according to signal transmission order, and signal is through Input Control Element behind the second amplifying circuit;

As further improvement of the utility model, described rotating speed display circuit includes digital display lamp decoder and four the digital display lamps that are electrically connected with control unit.

As further improvement of the utility model, described control information input circuit includes the mains switch, limit velocity and the speed regulation that are electrically connected with control unit totally six control buttons, also includes to cooperate described control button jointly to the electronic switching circuit of control unit input control information.

As further improvement of the utility model, described speed feedback circuit includes a photoelectrical coupler, and signal enters control unit through behind the photoelectrical coupler by amplifying circuit.

As further improvement of the utility model, described motor executive circuit includes one and the photoelectrical coupler that is electrically connected of control unit, and signal arrives controllable silicon after by photoelectrical coupler, and silicon controlled is connected electrically between power supply and the motor.

As further improvement of the utility model, described control unit is 51 Series chip such as 89c51.

The utlity model has following advantage: by gathering the phase signal in the power supply, send into computing in the control unit, the signal of certain duty ratio of output is controlled the silicon controlled break-make, such rotating speed control mode makes that the controller volume is small and exquisite, it is extremely convenient to transport, and its cost is lower than the cost of frequency conversion mode; In control information input circuit the inside, be provided with mains switch, limit velocity and speed regulation totally six control buttons, can easily control the stall of motor, maximum speed, minimum speed, and, can realize that the have level of motor within limit velocity regulate by the speed regulation button, satisfy different use needs; Speed feedback circuit and rotating speed display circuit can in time react the real-time speed of motor, and more convenient and user uses needs accurately.

Description of drawings

Fig. 1 is a principle pie graph of the present utility model;

Fig. 2 is the utility model circuit theory diagrams;

Embodiment

Below in conjunction with accompanying drawing concrete execution mode is illustrated:

As shown in Figure 1 and Figure 2, the governing speed and steady speed controlled circuit of a kind of interchange monophase machine includes 89C51 single-chip microcomputer 1, rotating speed display circuit 2, control information input circuit 3, speed feedback circuit 4, also comprises power phase sample circuit 5 and motor executive circuit 6; Power phase sample circuit 5 is by gathering the phase signal in the AC power, through being sent in the described 89C51 single-chip microcomputer 1 after amplification, rectification, the filtering, described 89C51 single-chip microcomputer 1 is through computing, and the signal of exporting certain duty ratio sends to described motor executive circuit 6 with the control rotating speed of motor.

Described phase sampling circuit 5 comprises transformer 51, one-level amplifying circuit 52, the second amplifying circuit 53 that connects according to signal transmission order, signal is through second amplifying circuit 53 back input 89C51 single-chip microcomputers 1, and described rotating speed display circuit 2 includes digital display lamp decoder 21 and four the digital display lamps 22 that are electrically connected with 89C51 single-chip microcomputer 1; Described control information input circuit 3 includes the mains switch, limit velocity and the speed regulation that are electrically connected with 89C51 single-chip microcomputer 1 totally six control buttons 31, also includes to cooperate described control button 31 jointly to the electronic switching circuits 32 of 89C51 single-chip microcomputer 1 input control information.

Described speed feedback circuit 4 includes a photoelectrical coupler 41, and signal enters 89C51 single-chip microcomputer 1 through photoelectrical coupler 41 backs by amplifying circuit 42; Described motor executive circuit 6 includes one and the photoelectrical coupler 61 that is electrically connected of control unit 1, and signal arrives controllable silicons 62 by photoelectrical coupler 61 backs, being connected electrically between power supply and the motor of controllable silicon 62.

During use, collect the waveform of power supply by power phase sample circuit 5, through one-level amplifying circuit one-level amplifying circuit 52, second amplifying circuit 53, the sinusoidal waveform of power supply becomes the square wave of rule, input 89C51 single-chip microcomputer 1, the signal that collects control button 31 and electronic switching circuit 32 from control information input circuit 3 is sent into 89C51 single-chip microcomputer 1, two signals pass through the computing of 89C51 single-chip microcomputer 1,89C51 single-chip microcomputer 1 outputs to motor executive circuit 6 to the execution signal with certain duty ratio, carry out signal and arrive controllable silicon 62 by photoelectrical coupler 61 backs, controllable silicon 62 is effectively controlled the sinusoidal wave time of passing through in each cycle according to carrying out signal, with effective control motor speed.

And can enter 89C51 single-chip microcomputer 1 to the running speed signal of motor after by photoelectrical coupler 41, amplifying circuit 42 in the speed feedback circuit 4,89C51 single-chip microcomputer 1 can be sent into rotating speed display circuit 2 to tach signal, digital display lamp decoder 21 in the rotating speed display circuit 2 can be converted to four digital display lamp 22 digital signals to tach signal, demonstrates the real-time rotating speed of motor by four digital display lamps 22.

Certainly, above embodiment just is explanation rather than restriction the utility model, can be with other 51 Series chip as: 89C51 single-chip microcomputer, even 98 Series chip replace; The mode of the photoelectricity coupling of using in the speed feedback circuit obtains rotating speed, can certainly adopt other transducer (as magnetoelectric sensor) to obtain the rotating speed of motor signal; Or the like ... such conversion all falls within the protection range of the present utility model.

Claims

1, the governing speed and steady speed controlled circuit of a kind of interchange monophase machine, include control unit (1), rotating speed display circuit (2), control information input circuit (3), speed feedback circuit (4), it is characterized in that: also comprise power phase sample circuit (5) and motor executive circuit (6); Power phase sample circuit (5) is by gathering the phase signal in the AC power, be sent to then in the described control unit (1), described control unit (1) is through computing, and the signal of exporting certain duty ratio sends to described motor executive circuit (6) with the control rotating speed of motor.

2, the governing speed and steady speed controlled circuit of interchange monophase machine according to claim 1, it is characterized in that: described phase sampling circuit (5) comprises transformer (51), one-level amplifying circuit (52), the second amplifying circuit (53) that connects according to signal transmission order, and signal is through second amplifying circuit (53) back Input Control Element (1).

3, the governing speed and steady speed controlled circuit of interchange monophase machine according to claim 1 is characterized in that: described rotating speed display circuit (2) includes and control unit (1) is electrically connected digital display lamp decoder (21) and four digital display lamps (22).

4, the governing speed and steady speed controlled circuit of interchange monophase machine according to claim 1, it is characterized in that: mains switch, limit velocity and the speed regulation that described control information input circuit (3) includes and control unit (1) is electrically connected be totally six control buttons (31), also includes to cooperate described control button (31) jointly to the electronic switching circuit (32) of control unit (1) input control information.

5, the governing speed and steady speed controlled circuit of interchange monophase machine according to claim 1, it is characterized in that: described speed feedback circuit (4) includes a photoelectrical coupler (41), and signal enters control unit (1) through photoelectrical coupler (41) back by amplifying circuit (42).

6, the governing speed and steady speed controlled circuit of interchange monophase machine according to claim 1, it is characterized in that: described motor executive circuit (6) includes one and the photoelectrical coupler (61) that is electrically connected of control unit (1), signal arrives controllable silicon (62) by photoelectrical coupler (61) back, being connected electrically between power supply and the motor of controllable silicon (62).

7, the governing speed and steady speed controlled circuit of interchange monophase machine according to claim 1, it is characterized in that: described control unit (1) is 51 Series chip such as 89C51.