阅读说明：本技术 一种双重保护功能的电机正反转控制系统 (Motor forward and reverse rotation control system with double protection functions ) 是由 秦术 袁玉明 冯基伟 于 2020-11-27 设计创作，主要内容包括：本发明提供的一种双重保护功能的电机正反转控制系统；包括启动控制电路、运行控制电路、电源,所述启动控制电路包括启动选择模块,所述运行控制电路包括分别与启动选择模块连接的正转控制电路和反转控制电路；本发明采用555定时器实现正转及反转时间控制,在限位开关异常的情况下,电机正反转的时间超过设定的最长时间之后也会切断电机供电,实现双重保护电机的作用。并且555定时器的延时时间可通过电阻调节,从而实现电机正向及反向的转动时间调节；不需要软件控制,只需要简单的经典硬件电路即可实现双重保护、时间可调节的电机正反转控制。(The invention provides a motor positive and negative rotation control system with double protection functions; the device comprises a starting control circuit, an operation control circuit and a power supply, wherein the starting control circuit comprises a starting selection module, and the operation control circuit comprises a forward rotation control circuit and a reverse rotation control circuit which are respectively connected with the starting selection module; the invention adopts the 555 timer to realize the forward rotation and reverse rotation time control, and the power supply of the motor can be cut off after the forward and reverse rotation time of the motor exceeds the set maximum time under the condition that the limit switch is abnormal, thereby realizing the function of double protection of the motor. The delay time of the 555 timer can be adjusted through a resistor, so that the forward and reverse rotation time adjustment of the motor is realized; the motor forward and reverse rotation control with double protection and adjustable time can be realized only by a simple classical hardware circuit without software control.)

1. The utility model provides a motor of duplicate protection function is control system that is just reversing which characterized in that: the device comprises a starting control circuit, an operation control circuit and a power supply, wherein the starting control circuit comprises a starting selection module, and the operation control circuit comprises a forward rotation control circuit and a reverse rotation control circuit which are respectively connected with the starting selection module;

the forward rotation control circuit and the reverse rotation control circuit perform timing control on forward rotation and reverse rotation of the direct current motor M and perform limit protection on the forward rotation and the reverse rotation;

the starting control circuit selects the positive and negative rotation state of the starting state of the direct current motor M and indicates the running state of the direct current motor M;

the power supply respectively supplies power for the starting control circuit and the operation control circuit.

2. The motor positive and negative rotation control system with double protection functions as claimed in claim 1, characterized in that: the starting selection module is a forward and reverse rotation selection switch K1, and a fixed contact of the forward and reverse rotation selection switch K1 is connected with the direct current motor M.

3. The motor positive and negative rotation control system with double protection functions as claimed in claim 2, characterized in that: and two ends of the direct current motor M are respectively connected with a forward rotation indicator lamp and a reverse rotation indicator lamp.

4. The motor positive and negative rotation control system with double protection functions as claimed in claim 1, characterized in that: the forward rotation control circuit and the reverse rotation control circuit are identical in structure and respectively comprise a timer, and two ends of the timer are respectively connected with the limit switch and the driving circuit.

5. The motor positive and negative rotation control system with double protection functions as claimed in claim 4, characterized in that: the timer adjusts the timing time through the adjusting button.

6. The motor positive and negative rotation control system with double protection functions as claimed in claim 1, characterized in that: the starting control circuit further comprises a forward rotation trigger key K2 and a reverse rotation trigger mounting piece K3, wherein the forward rotation trigger key K2 and the reverse rotation trigger mounting piece K3 are respectively connected with the forward rotation control circuit and the reverse rotation control circuit.

Technical Field

The invention relates to a motor forward and reverse rotation control system with double protection functions.

Background

The direct current motor has excellent performance, convenient control and simple operation, so that the direct current motor is widely applied to the field needing precise control in various industries; most of the existing direct current motor positive and negative rotation control methods utilize a single chip microcomputer to control the switching direction and start and stop of a motor, and only utilize a limit switch to control the stop of the motor, so that a plurality of defects are presented in use, and the method specifically comprises the following steps: a main control chip (such as a single chip microcomputer), a plurality of power supply conversion circuits and a large-size relay are required, and related software control algorithms are required to be compiled to realize positive and negative rotation and logic control of the motor, so that the circuit is large in size and high in cost; the motor only depends on limit switch hardware to realize stopping when stopping, if limit switch damages and may lead to the motor stall, damages the motor.

Disclosure of Invention

In order to solve the technical problem, the invention provides a motor forward and reverse rotation control system with double protection functions.

The invention is realized by the following technical scheme.

The invention provides a motor positive and negative rotation control system with double protection functions; the device comprises a starting control circuit, an operation control circuit and a power supply, wherein the starting control circuit comprises a starting selection module, and the operation control circuit comprises a forward rotation control circuit and a reverse rotation control circuit which are respectively connected with the starting selection module;

the forward rotation control circuit and the reverse rotation control circuit perform timing control on forward rotation and reverse rotation of the direct current motor M and perform limit protection on the forward rotation and the reverse rotation;

the starting control circuit selects the positive and negative rotation state of the starting state of the direct current motor M and indicates the running state of the direct current motor M;

the power supply respectively supplies power for the starting control circuit and the operation control circuit.

The starting selection module is a forward and reverse rotation selection switch K1, and a fixed contact of the forward and reverse rotation selection switch K1 is connected with the direct current motor M.

And two ends of the direct current motor M are respectively connected with a forward rotation indicator lamp and a reverse rotation indicator lamp.

The forward rotation control circuit and the reverse rotation control circuit are identical in structure and respectively comprise a timer, and two ends of the timer are respectively connected with the limit switch and the driving circuit.

The timer adjusts the timing time through the adjusting button.

The starting control circuit further comprises a forward rotation trigger key K2 and a reverse rotation trigger mounting piece K3, wherein the forward rotation trigger key K2 and the reverse rotation trigger mounting piece K3 are respectively connected with the forward rotation control circuit and the reverse rotation control circuit.

The invention has the beneficial effects that: the invention adopts the 555 timer to realize the forward rotation and reverse rotation time control, and the power supply of the motor can be cut off after the forward and reverse rotation time of the motor exceeds the set maximum time under the condition that the limit switch is abnormal, thereby realizing the function of double protection of the motor. The delay time of the 555 timer can be adjusted through a resistor, so that the forward and reverse rotation time adjustment of the motor is realized; the motor forward and reverse rotation control with double protection and adjustable time can be realized only by a simple classical hardware circuit without software control.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic diagram of a control panel structure of a control panel made in accordance with the principles of the present invention.

Detailed Description

The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.

A motor positive and negative rotation control system with double protection functions; the device comprises a starting control circuit, an operation control circuit and a power supply, wherein the starting control circuit comprises a starting selection module, and the operation control circuit comprises a forward rotation control circuit and a reverse rotation control circuit which are respectively connected with the starting selection module;

the forward rotation control circuit and the reverse rotation control circuit perform timing control on forward rotation and reverse rotation of the direct current motor M and perform limit protection on the forward rotation and the reverse rotation;

the starting control circuit selects the positive and negative rotation state of the starting state of the direct current motor M and indicates the running state of the direct current motor M;

the power supply respectively supplies power for the starting control circuit and the operation control circuit.

The starting selection module is a forward and reverse rotation selection switch K1, and a fixed contact of the forward and reverse rotation selection switch K1 is connected with the direct current motor M.

And two ends of the direct current motor M are respectively connected with a forward rotation indicator lamp and a reverse rotation indicator lamp.

The forward rotation control circuit and the reverse rotation control circuit are identical in structure and respectively comprise a timer, and two ends of the timer are respectively connected with the limit switch and the driving circuit.

The timer adjusts the timing time through the adjusting button.

The starting control circuit further comprises a forward rotation trigger key K2 and a reverse rotation trigger mounting piece K3, wherein the forward rotation trigger key K2 and the reverse rotation trigger mounting piece K3 are respectively connected with the forward rotation control circuit and the reverse rotation control circuit.

As shown in fig. 1, the device mainly includes a motor forward rotation control circuit, a reverse rotation control circuit, a forward/reverse rotation selection switch K1, a forward rotation trigger button K2, a reverse rotation trigger button K3, a direct current motor M, an operating state indicating circuit, and the like. Fig. 2 shows a schematic structural design of a control panel according to the present invention.

The working principle of the module is as follows: firstly, selecting a forward and reverse rotation selection switch K1 (for example, selecting forward rotation), then pressing a forward rotation trigger key K2 to realize forward rotation of the motor, wherein a forward rotation indicator light is on during forward rotation to indicate the state of the motor; if the transmission mechanism moves to reach the position of the forward rotation limit switch, the limit switch indicator lamp is turned on to indicate the state of the position switch, the limit switch signal controls the 555 timer to stop outputting, the forward rotation driving circuit stops working, and the motor M stops; if the transmission mechanism does not reach the position of the positive limit switch, the motor M also stops when the positive timing time is up. The forward and reverse rotation time of the motor can be controlled by adjusting the oscillation time of the 555 timer through the timing resistor.

As shown in fig. 2, for the manufactured controller control panel, the original devices all adopt methods of redundancy design (position switches and the like), component derating and the like according to selection, and have high reliability; the positive and negative rotation of the motor is realized by a pure hardware circuit without programming software; the 555 timer is used for controlling the forward and reverse rotation time of the motor, the forward and reverse rotation time of the motor can be controlled, and the motor can be stopped and started at any time. The design is simple and practical, the overall dimension is small, the number of selected devices is small, the cost is low, the reliability is high, the effect is good, and the use value is high. The method can be widely applied to the positive and negative rotation control of most direct current motors.