CN215072204U

CN215072204U - AC motor start control circuit

Info

Publication number: CN215072204U
Application number: CN202120820238.4U
Authority: CN
Inventors: 杨长平; 朱曙东; 刘汪勇
Original assignee: Shenzhen Renaissance Technology Co ltd
Current assignee: Shenzhen Renaissance Technology Co ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-12-07
Anticipated expiration: 2031-04-20

Abstract

The utility model discloses an AC motor start control circuit, which comprises a power supply, a CPU, a silicon controlled rectifier for controlling the motor switch, a first lead H1, a second lead H2, a third lead H3 and a fourth lead H4 which are connected with the motor, a winding, a capacitor and a control switch; the capacitor comprises a running capacitor CR and a starting capacitor CS, the running capacitor CR is connected with the winding, and two ends of the starting capacitor CS are respectively connected with the third lead H3 and the fourth lead H4; two ends of the controlled silicon are respectively connected with the second lead wire H2 and the third lead wire H3; the second lead H2 is used for collecting signals of an input power supply and sending the sampling signals to the CPU, the fourth lead H4 is used for collecting signals of motor voltage and sending the sampling signals to the CPU, and the CPU controls the on and off of the controllable silicon through a driving module. The utility model discloses technical scheme realizes one kind and contains single-phase symmetry winding type electric capacity start, electric capacity operation electric capacity start, motor just reversal start control circuit.

Description

AC motor start control circuit

Technical Field

The utility model relates to an AC motor control technology field, in particular to AC motor start control circuit

Background

The existing alternating current motor control circuit is usually only started by an independent capacitor or an independent forward and reverse rotation starting control circuit, so that the labor intensity of forward and reverse rotation control operators of the alternating current motor is high, the operation is unsafe, large labor hour is consumed in the use process, the time and the space are wasted, and the working efficiency is low.

Accordingly, the prior art is deficient and needs improvement.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an alternating current motor start control circuit aims at realizing that one kind contains single-phase symmetrical winding type electric capacity start, electric capacity operation electric capacity start, the motor just reverses start control circuit.

In order to achieve the above object, the present invention provides an ac motor start control circuit, which includes a power supply, a CPU, a thyristor for controlling the switching of the motor, a first lead H1, a second lead H2, a third lead H3 and a fourth lead H4 connected to the motor, a winding, a capacitor, and a control switch; the capacitors comprise a running capacitor CR and a starting capacitor CS, the running capacitor CR is connected with the winding, and two ends of the starting capacitor CS are respectively connected with the third lead H3 and the fourth lead H4; two ends of the controllable silicon are respectively connected with the second lead wire H2 and the third lead wire H3; the second lead H2 is used for collecting signals of an input power supply and sending the sampled signals to the CPU, the fourth lead H4 is used for collecting signals of motor voltage and sending the sampled signals to the CPU, and the CPU controls the on and off of the controllable silicon through a driving module.

Preferably, the windings comprise a first winding M1 and a second winding M2, and the running capacitor CR is connected between the first winding M1 and the second winding M2.

Preferably, the control switch is a manual switch or an automatic switch for controlling the forward and reverse rotation of the motor.

Preferably, a sampling resistor is connected between the second lead H2 and the fourth lead H4 and the CPU respectively.

Preferably, a discharge resistor is further connected between the fourth lead H4 and the sampling resistor.

Preferably, the drive portion is provided as an optocoupler.

Compared with the prior art, the beneficial effects of the utility model are that: the combination of the operation of an electronic centrifugal starting switch and a starting capacitor and an unconventional electrifying working mode are adopted, so that a single-phase symmetrical winding type capacitor starting/capacitor operation capacitor starting/motor forward and reverse rotation starting control circuit is formed, the labor time of a client can be effectively reduced, the space waste is reduced, the working efficiency is improved, and the short circuit failure is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of a manual switch circuit of the present invention;

FIG. 2 is a schematic diagram of an automatic switching circuit of the present invention;

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The starting control circuit of the alternating current motor provided by the embodiment comprises a power supply, a CPU, a silicon controlled rectifier for controlling the switch of the motor, a first lead wire H1, a second lead wire H2, a third lead wire H3 and a fourth lead wire H4 which are connected with the motor, a winding, a capacitor and a control switch; the capacitors comprise a running capacitor CR and a starting capacitor CS, the running capacitor CR is connected with the winding, and two ends of the starting capacitor CS are respectively connected with the third lead H3 and the fourth lead H4; two ends of the controllable silicon are respectively connected with the second lead wire H2 and the third lead wire H3; the second lead H2 is used for collecting signals of an input power supply and sending the sampled signals to the CPU, the fourth lead H4 is used for collecting signals of motor voltage and sending the sampled signals to the CPU, and the CPU controls the on and off of the controllable silicon through a driving module.

Further, the winding includes a first winding M1 and a second winding M2, and the running capacitor CR is connected between the first winding M1 and the second winding M2.

Further, the control switch is set to be a manual switch or an automatic switch for controlling the forward and reverse rotation of the motor.

Further, a sampling resistor is connected between the second lead H2 and the fourth lead H4 and the CPU respectively.

Further, a discharge resistor is connected between the fourth lead H4 and the sampling resistor.

Further, the driving portion is provided as an optocoupler.

Referring to fig. 1, the control switch is a manual switch:

when a key is pressed, the first winding M1 is a main winding, the second winding M2 is an auxiliary winding, a running capacitor CR is connected between the first winding M1 and the second winding M2, one end of the running capacitor CR is connected with a second lead wire H2, the other end of the running capacitor CR is connected with a fourth lead wire H4, a fourth lead wire H4 is connected with a starting capacitor CS, the other end of the starting capacitor CS is connected with a third lead wire H3, the other end of the third lead wire H3 is connected with a silicon controlled rectifier, the other end of the silicon controlled rectifier is connected with a second lead wire H2, and the second lead wire H2 is connected with the running capacitor CR, so that a group of linked switches is formed;

when a key is pressed, the second winding M2 is a main winding, the first winding M1 is an auxiliary winding, the second winding M2 is connected with the second lead wire H2, the first winding M1 is connected with the fourth lead wire H4, the fourth lead wire H4 is connected with the starting capacitor CS, the other end of the starting capacitor CS is connected with the third lead wire H3, the other end of the third lead wire H3 is connected with the controllable silicon, and the other end of the controllable silicon is connected with the second lead wire H2, so that another group of linkage switches is formed.

The working principle is as follows: after the power supply is connected, the positive and negative rotation operations are controlled by pressing the up-down key, the sampling signal and the signal triggering the third lead wire H3 are transmitted to the CPU while the key is pressed, the CPU transmits the signal to the driving part, and the driving part controls the on-off of the controllable silicon.

Referring to fig. 2, the control switch is an automatic switch:

when the automatic switch is started to rotate forwards, the first winding M1 is a main winding, the second winding M2 is an auxiliary winding, a running capacitor CR is connected between the first winding M1 and the second winding M2, one end of the running capacitor CR is connected with a second lead wire H2, the other end of the running capacitor CR is connected with a fourth lead wire H4, a fourth lead wire H4 is connected with a starting capacitor CS, the other end of the starting capacitor CS is connected with a third lead wire H3, the other end of the third lead wire H3 is connected with a silicon controlled rectifier, the other end of the silicon controlled rectifier is connected with a second lead wire H2, and the second lead wire H2 is connected with the running capacitor CR, so that a group of linked switches is formed;

when the automatic switch is turned on and reversely, the second winding M2 is a main winding, the first winding M1 is an auxiliary winding, the second winding M2 is connected with the second lead wire H2, the first winding M1 is connected to the fourth lead wire H4, the fourth lead wire H4 is connected with the starting capacitor CS, the other end of the starting capacitor CS is connected with the third lead wire H3, the other end of the third lead wire H3 is connected with the silicon controlled rectifier, and the other end of the silicon controlled rectifier is connected with the second lead wire H2, so that another group of linked switches is formed.

The working principle is as follows: after the power supply is connected, the sampling signal and the signal triggering H3 are transmitted to the CPU, and the CPU sends a signal to the driving part to control the silicon controlled switch.

Electrical signal transmission and closing relationship: the second lead H2 and the third lead H3 have functions of detecting and collecting signals, the fourth lead H4 detects signals of motor voltage, the second lead H2 detects signals of an input power supply, the signals are automatically uploaded to a CPU after being sampled, and the CPU controls the opening and closing of a switch according to a programming mode commonly used in the prior art. The scheme is specially designed for application in severe industrial environment, the CPU is added with a quick response function compared with the traditional electronic centrifugal switch, flexible instructions are used, the realized function exceeds the commonly used electronic centrifugal switch, the working efficiency is effectively improved, and the short circuit is prevented.

The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The starting control circuit of the alternating current motor is characterized by comprising a power supply, a CPU, a silicon controlled rectifier for controlling the switch of the motor, a first lead wire H1, a second lead wire H2, a third lead wire H3 and a fourth lead wire H4 which are connected with the motor, a winding, a capacitor and a control switch; the capacitors comprise a running capacitor CR and a starting capacitor CS, the running capacitor CR is connected with the winding, and two ends of the starting capacitor CS are respectively connected with the third lead H3 and the fourth lead H4; two ends of the controllable silicon are respectively connected with the second lead wire H2 and the third lead wire H3; the second lead H2 is used for collecting signals of an input power supply and sending the sampled signals to the CPU, the fourth lead H4 is used for collecting signals of motor voltage and sending the sampled signals to the CPU, and the CPU controls the on and off of the controllable silicon through a driving module.

2. An ac motor start control circuit according to claim 1 wherein the windings comprise a first winding M1 and a second winding M2, the run capacitor CR being connected between the first winding M1 and the second winding M2.

3. An ac motor start control circuit as claimed in claim 1 wherein the control switch is configured as a manual or automatic switch to control the forward and reverse rotation of the motor.

4. The ac motor start control circuit of claim 1, wherein a sampling resistor is connected between the second lead H2 and the fourth lead H4 and the CPU, respectively.

5. The ac motor start control circuit of claim 4, wherein a discharge resistor is further connected between said fourth lead H4 and said sampling resistor.

6. The ac motor start control circuit of claim 1, wherein the driving module is configured as an optocoupler.