CN201163294Y

CN201163294Y - Overloading prompter of single-phase motor with centrifugal switch

Info

Publication number: CN201163294Y
Application number: CNU2007201510986U
Authority: CN
Inventors: 郭将
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-05-14
Filing date: 2007-05-14
Publication date: 2008-12-10
Anticipated expiration: 2017-05-14

Abstract

An overload reminder for a single-phase motor provided with a centrifugal switch consists of an overload detection circuit, a control circuit, an audible and visual alarm circuit or an electric bell, and a power supply. When the motor has an overload, switching-off and switching-on signals of the centrifugal switch of the motor or the alternating voltage secondarily generated by a current transformer connected in series with a starting capacitance are taken as control signals to make the audible and visual alarm circuit work or the electric bell give out sound, and an overload indicator lamp lights up to remind working personnel of reducing the load of the motor, thereby ensuring that the motor is not burnt out.

Description

Band centrifugal switch single phase motor overload reminiscences

Affiliated technical field

When the single phase motor of band centrifugal switch overloaded, the utility model detected the overload signal and sends sound and light alarm, reminded the staff that motor is lightened the load, thereby the protection motor is not burnt out.

Background technology

At present, the single phase motor of band centrifugal switch when long-time overload, make motor pay coil winding easily during its centrifugal switch closure conducting, and starting capacitance is burnt out.

Summary of the invention

Easily burnt out when overloading for the single phase motor that overcomes the band centrifugal switch, the utility model provides a kind of band centrifugal switch single phase motor overload reminiscences.When motor overloads, the motor overload detection circuitry in the utility model, detected overload signal removes the guide sound optical alarm circuit, makes warning circuit work send sound and light alarm, reminds the staff to lighten the load to it.

The utility model technical solution technical scheme that problem adopts: constitute by following circuit in the utility model.

Its overload detection circuitry of motor overload detection circuitry can be by current transformer as detecting sensor, also can be by photoelectrical coupler as detecting sensor.When Current Transformer during as detecting sensor, its overload detection circuitry (see figure 2) is made up of current transformer B2, diode D5, capacitor C 2, resistance R 1, R2, and its current transformer B2 (ab end) is connected in series place in circuit mutually with motor starting electric capacity.The closed conducting of centrifugal switch when motor overloads, current transformer B2 (ab end) has electric current to pass through, the voltage of its secondary induction has DC voltage through diode D5, capacitor C 2 rectifying and wave-filterings on capacitor C 2, go guide sound optical alarm circuit A (Fig. 9) to send sound and light alarm with this voltage.When using photoelectrical coupler as detecting sensor, its overload detection circuitry (see figure 1) is made of resistance R 5, R6, R4, R3, R1, capacitor C 3, photoelectrical coupler D, centrifugal switch contact G, triode BG3, BG4, light emitting diode when motor overloads in the photoelectrical coupler by luminous to not luminous, triode BG3, BG4 by saturation conduction to ending, on the capacitor C 3 DC voltage is arranged, A sends sound and light alarm with this Control of Voltage warning circuit.

Control piece in its control circuit of control circuit can be made up of triode or controllable silicon, also can be made of relay or field effect transistor.When its control circuit was made of triode, its control circuit (see figure 3) was made up of triode BG1, BG2, resistance R 1, R2, capacitor C 2, diode D5.When motor overloaded, the DC voltage on the capacitor C 2 made triode BG1, BG2 saturation conduction, made sound light alarming circuit A (Fig. 9) energising send sound and light alarm.When constituting control circuit with controllable silicon, its circuit (see figure 6) is made up of controllable silicon B, resistance R 1, R2, capacitor C 2, diode D5.When motor overloaded, the DC voltage on the capacitor C 2 made the controllable silicon conducting, and the electric bell H that is serially connected on the controllable silicon sends chimes of doom.When constituting control circuit with relay, its circuit (see figure 2) is made of triode BG1, BG2, resistance R 1, R2, capacitor C 2, diode D5, relay, or is made of resistance R 1, R2, capacitor C 2, relay J, controllable silicon B (Fig. 7).When motor overloads, triode BG1, BG2 or controllable silicon conducting, the relay J adhesive, relay contact closure makes sound light alarming circuit A or electric bell H energising send warning.When constituting control circuit with field effect transistor, its circuit (see figure 10) is made of field effect transistor BG7, resistance R 1, R2, R16, diode D5, voltage stabilizing diode D7, capacitor C 2.When motor overloaded, the voltage on the capacitor C 2 made field effect transistor BG7 saturation conduction, made sound light alarming circuit A work send warning.

Its circuit (see figure 9) of sound light alarming circuit is by loudspeaker G, capacitor C 4, C5, C6, C7, C8, C9, C10, C11, resistance R 7, R8, R9, R10, R11, R12, R13, R14, R15, integrated circuit (IC) 2 (TDA2030A), triode BG5, BG6, the overload pilot lamp constitutes.

The circuit that its circuit (see figure 1) of power circuit is made of fuse FU, supply voltage device B1, commutation diode D1, D2, D3, D4, capacitor C 1.

The utility model beneficial effect is:

When the overload of band centrifugal switch single phase motor, overload detection circuitry in the utility model detects the overload signal, with its overload signal controlling sound light alarming circuit or electric bell, make sound light alarming circuit or electric bell send warning, remind the staff that motor is lightened the load, prevent that motor from being burnt out, reduce the motor spoilage.

Description of drawings

Fig. 1 is control piece electrical schematic diagram (A is a sound light alarming circuit, sees Fig. 9) for being sensor with photoelectrical coupler with triode, relay

Fig. 2 is a sensor for Current Transformer, is control piece electrical schematic diagram (A is a sound light alarming circuit, sees Fig. 9) with triode, relay

Fig. 3 is a sensor for Current Transformer, is control piece with the triode, directly guide sound optical alarm circuit electrical schematic diagram (A is a sound light alarming circuit, sees Fig. 9)

Fig. 4 is a sensor for Current Transformer, is control piece with the controllable silicon, directly guide sound optical alarm circuit schematic diagram (A is a sound light alarming circuit, sees Fig. 9)

Fig. 5 is band centrifugal switch single phase motor wiring diagram, and wherein cd is for connecing the 220V main winding, and G is a centrifugal switch, and ab is for connecing the current transformer primary coil

Fig. 6 is a sensor for Current Transformer, directly controls electric bell H electrical schematic diagram with controllable silicon

Fig. 7 is a sensor for Current Transformer, is control piece with the controllable silicon relay, relay contact control electric bell H electricity reason figure

Fig. 8 is for being signal source with the voice integrated package, the sound and light alarm electrical schematic diagram

Fig. 9 is a signal source with oscillator (BG5, BG6), the sound and light alarm electrical schematic diagram

Figure 10 is a sensor for Current Transformer, is control piece with the field effect transistor, directly guide sound optical alarm circuit schematic diagram (A is a sound light alarming circuit, sees Fig. 9)

Embodiment:

This Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 6, Fig. 7, Fig. 8, Fig. 9, among Figure 10, resistance R 1 is 300 Ω, R2 is a 20K Ω adjustable resistance, R3 is 6.8K Ω, R4 is 10K Ω, R5 is a 200K Ω adjustable resistance, R6 is 50K Ω, R7 is 68K Ω, R8 is 1K Ω, R9 is 68K Ω, R10 is 100K Ω, R11 is 100K Ω, R12 is 10K Ω, R13 is 68K Ω, R14 is 68K Ω, R15 is 10K Ω, R16 is 4K Ω, R17 is an inductance resistance, capacitor C 1 is 3300uF35V, C2 is 100uF25V, C3 is 100uF25V, C4 is 1000uF25V, C5 is 10uF25V, C6 is 0.01uF63V, C7 is 0.47uF63V, C8 is 1000uF35V, C9 is 0.068uF63V, C10 is 0.068uF63V, C11 is 3300uF35V, diode D1, D2, D3, D4, D5, D6 is 1N4007, D7 is the voltage stabilizing diode of 13V, triode BG1 is 3DD15B, BG2 is 3DG12C, BG3, BG4 is 3DG12C, BG5, BG6 is 3DG12C, field effect transistor BG7 is BUZ74, controllable silicon B is BT136, alarm lamp W is 24V1W, Fig. 1, relay J among Fig. 2 is JQX-10F (24V), Fig. 7 repeat circuit J is the 220V10A A.C. contactor, electric bell H is 220V10W, transformer B1 is elementary to be 220V, secondary is 18V, the 20W power transformer, current transformer B2 is elementary to be 10 circles, secondary is the transformer of 1000 circles, exchanging fuse FU is 0.5A250V, dc insurance silk FU is 2A, and photoelectrical coupler D is PC817.

Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 6, Fig. 7, Figure 10 form 7 embodiment respectively, and A is the sound light alarming circuit (see figure 9) among the figure, and control circuit is the on/off of guide sound optical alarm circuit.

Claims

A kind of band centrifugal switch single phase motor overload reminiscences is characterized in that it comprises:

Whether overload detection circuitry is used to detect motor and overloads, its output connection control circuit input end;

Control circuit is used for guide sound optical alarm circuit or electric bell, its output termination sound light alarming circuit or electric bell;

Sound light alarming circuit sends sound and light alarm when being used for the motor overload;

Power supply is for above circuit provides power supply.