CN211470415U

CN211470415U - Automatic winding device for direct current motor for measuring grounding resistance

Info

Publication number: CN211470415U
Application number: CN201922429849.1U
Authority: CN
Inventors: 英自才; 刘晓欣; 孔碧光; 刘绍正; 普碧才; 冯建辉; 张兴文; 王寿军; 和跃; 辛立强; 左鸿; 杨礼锋; 王英伍; 瞿威均; 李学富; 和斌全; 耿座学; 张佳福; 余金文; 柴涛
Original assignee: Nujiang Power Supply Bureau of Yunnan Power Grid Co Ltd
Current assignee: Nujiang Power Supply Bureau of Yunnan Power Grid Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-09-11
Anticipated expiration: 2029-12-30

Abstract

The utility model provides an automatic coiling device of direct current motor for ground resistance measurement, includes the single chip microcomputer system circuit, rotational speed display module, button control module, motor parameter acquisition module, power module and the motor speed governing module that links to each other with the single chip microcomputer system circuit respectively, wherein the motor speed governing module is including consecutive PWM control module, drive module and motor, the motor still links to each other with power module and motor parameter acquisition module, the utility model discloses utilize direct current motor to realize the quick neat of the used wire of ground resistance measurement and accomodate to have corotation, reversal and inching function, have the speed governing function simultaneously, realized the automatic coiling of ground resistance measurement in-process wire.

Description

Automatic winding device for direct current motor for measuring grounding resistance

Technical Field

The utility model relates to an automatic coiling device of direct current motor for the required cable's of measurement is accomodate and arrangement when ground resistance measures.

Background

The existing ground resistance measurement is a common work of a power department, but no matter what equipment is adopted, a long lead is needed, and in actual field operation, the storage of the lead is inconvenient greatly. Meanwhile, during the grounding resistance measurement work, the wires are long and large in quantity, the wires are difficult to arrange in the measurement process and after measurement, the manual wire winding efficiency is low, and the work labor intensity is high.

Disclosure of Invention

An object of the utility model is to provide a be used for ground resistance measuring automatic coiling mechanism of direct current motor, carry out the wire in the suitable ground resistance measurement work and accomodate and arrange in order the work, realize the automatic spiral of ground resistance measurement in-process wire.

The utility model discloses a realize like this, be one kind promptly and be used for ground resistance measuring DC motor automatic winding device, including the single chip microcomputer system circuit, the rotational speed display module, button control module, motor parameter acquisition module, power module and the motor speed governing module that link to each other with the single chip microcomputer system circuit respectively, wherein the motor speed governing module is including consecutive PWM control module, drive module and motor, the motor still links to each other its characterized in that with power module and motor parameter acquisition module:

the motor speed regulation module comprises a motor M1, a capacitor C4, four NPN triodes Q1, Q2, Q3, Q6, two PNP triodes Q4 and Q5, four diodes D1, D2, D3 and D4 and four resistors R1, R2, R4 and R5, wherein:

the anode of the diode D1 is connected with the cathode of the diode D3, the anode of the diode D2 is connected with the cathode of the diode D4, the cathode of the diode D1 is connected with the cathode of the diode D2 and is connected with a power supply voltage VCC, and the anode of the diode D3 is connected with the anode of the diode D4 and is connected with the ground in parallel;

the capacitor C4 is connected in parallel at two ends of the motor, one end of the capacitor C4 is connected between the anode of the diode D1 and the cathode of the diode D3, and the other end of the capacitor C4 is connected between the anode of the diode D2 and the cathode of the diode D4;

an emitter electrode of the NPN triode Q3 is connected with an emitter electrode of the PNP triode Q4, and a base electrode of the NPN triode Q3 is connected with a base electrode of the PNP triode Q4; an emitter electrode of the NPN triode Q6 is connected with an emitter electrode of the PNP triode Q5, and a base electrode of the NPN triode Q6 is connected with a base electrode of the PNP triode Q5; the collector of the NPN triode Q3 is connected with the collector of the NPN triode Q6 and is connected with a power supply voltage VCC; the collector of the PNP triode Q4 is connected with the collector of the PNP triode Q5 and is grounded;

a collector of the NPN triode Q1 is connected with the resistor R1 and the power supply voltage VCC, a collector of the NPN triode Q2 is connected with the resistor R2 and the power supply voltage VCC, and emitters of the NPN triodes Q1 and Q2 are grounded respectively; bases of NPN triodes Q1 and Q2 are respectively connected with a resistor R4 and a resistor R5.

In the above automatic winding device for a direct current motor used for measuring ground resistance, the system circuit of the single chip microcomputer comprises a reset circuit, a clock circuit and a power circuit which are connected to the single chip microcomputer, the clock circuit externally connects a crystal oscillator to two pins of the single chip microcomputer, and then the two pins are respectively connected to two capacitors of C2 and C3.

In the above automatic winding device for a direct current motor used for measuring ground resistance, the key control module is provided with at least 5 keys which are respectively used for controlling forward rotation, reverse rotation and inching control and can adjust acceleration and deceleration.

In the above automatic winding device for a direct current motor used for measuring ground resistance, the motor speed regulation module switches on and off a power supply according to a fixed frequency in the adjustment of PWM driving control, changes the length of the on and off time in a period according to the need, and changes the magnitude of the average voltage by changing the "duty ratio" of the voltage on the armature of the direct current motor, thereby controlling the rotation speed of the motor.

Due to the adoption of the technical scheme, the direct current motor is utilized to realize the rapid and tidy storage of the lead used for measuring the ground resistance, and the direct current motor has the functions of forward rotation, reverse rotation and inching, has the function of speed regulation and realizes the automatic winding of the lead in the process of measuring the ground resistance.

Drawings

Fig. 1 is a system block diagram of an automatic winding device for a dc motor for measuring ground resistance according to the present invention;

fig. 2 is a schematic circuit diagram of an automatic winding device of a dc motor for measuring ground resistance according to the present invention;

fig. 3 is a schematic circuit diagram of the motor speed regulation module of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1, the automatic winding device for the direct current motor for measuring the ground resistance comprises a single chip microcomputer system circuit 1, a rotating speed display module 3, a key control module 2, a motor parameter acquisition module 4, a power module 6 and a motor speed regulation module 5 which are respectively connected with the single chip microcomputer system circuit, wherein the motor speed regulation module 5 comprises a PWM control module, a driving module and a motor which are sequentially connected, and the motor is further connected with the power module and the motor parameter acquisition module.

The utility model discloses set for and drive DC motor by the singlechip and rotate, DC motor's rotational speed shows, controls (slows down with higher speed) DC motor rotational speed, DC motor's start-up, stops. The DC motor performs winding and unwinding operations (forward rotation and reverse rotation).

Referring to fig. 2 and 3, the STC89C51 single chip microcomputer is used as a main controller, the direct current motor carries out rotation speed detection by the hall sensor, the motor driving speed regulation module adopts triode driving, the speed regulation of the motor adopts PWM technology, and the power module selects: the DC interface is used for direct 5v voltage power supply.

The single chip microcomputer system circuit comprises a reset circuit, a clock circuit and a power circuit which are connected to the single chip microcomputer, wherein the clock circuit is externally connected with a crystal oscillator on two pins of the single chip microcomputer, and then the two pins are respectively connected into two capacitors C2 and C3.

The key control module is provided with at least 5 keys which are respectively used for controlling forward rotation, reverse rotation and inching control and can adjust acceleration and deceleration.

The motor speed regulation module switches on and off a power supply according to a fixed frequency in the adjustment of PWM drive control, changes the length of the on time and the off time in a period according to requirements, and changes the size of average voltage by changing the duty ratio of voltage on an armature of a direct current motor, thereby controlling the rotating speed of the motor.

PWM is a voltage regulation method that changes the voltage across the load by fixing the switching frequency of the dc power supply to achieve the control requirement. In a PWM drive controlled regulation system, the power supply is turned on and off at a fixed frequency and the length of the "on" and "off" times in a cycle is varied as required. The rotation speed of the motor is controlled by changing the 'duty ratio' of the voltage on the armature of the direct current motor to change the magnitude of the average voltage.

The single-chip STC89C51 has two timers T0 and T1. By controlling the initial values of the timers T0 and T1, pulse waveforms with different duty ratios can be output from any output port of STC89C 51. Different timing initial values can be set, so that the duty ratio is changed, and the purpose of controlling the rotating speed of the motor is achieved.

The circuit of the motor PWM driving module adopts H-bridge driving, and the specific circuit is shown in figure 3. The circuit adopts a driving circuit based on a PWM principle.

The PWM circuit consists of a composite transistor, and the high and low levels of two input ends control whether the transistor is switched on or switched off. When the transistors of NPN are switched on at the high level input, the transistors of PNP are switched on at the low level input, when Q1 and Q2 are both switched on, Q3 and Q6 are switched off, Q4 and Q5 are switched on, two ends of the motor are both GND, the motor does not rotate, when Q1 and Q2 are both switched off, Q3 and Q6 are switched on, Q4 and Q5 are switched off, two ends of the motor are both VCC, the motor does not rotate, then when Q1 is switched on and Q2 is switched off, Q4 and Q6 are switched on, the right side of the motor is a power supply, the left side is ground, the motor rotates anticlockwise, when Q2 is kept switched off, the Q1 is PWM controls the on-off, the speed of the motor can be controlled, similarly, when Q1 is switched off and Q2 is switched on, Q3 and Q5 are switched on, the left side of the motor is a power supply, the right side of the ground, the motor rotates clockwise, when Q1 is switched off, the PWM controls the. The function of the 4 diodes in the circuit is to prevent the transistors from generating an improper reverse voltage and to protect the current across the motor and the current on the transistors from being excessive.

To sum up, the utility model discloses an utilize direct current motor to carry out necessary automation and transformation to current spiral system, realized the automatic spiral of ground resistance measurement in-process wire.

The above examples are provided for illustrative purposes only, and are not intended to limit the scope of the present invention. Various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention, and all equivalent technical solutions should fall within the scope of the invention, which is defined by the claims.

Claims

1. The utility model provides an automatic coiling mechanism of direct current motor for ground resistance measurement, includes single chip microcomputer system circuit, rotational speed display module, button control module, motor parameter acquisition module, power module and the motor speed governing module that links to each other with single chip microcomputer system circuit respectively, wherein the motor speed governing module is including consecutive PWM control module, drive module and motor, the motor still links to each other its characterized in that with power module and motor parameter acquisition module:

2. The automatic winding device of the direct current motor for the ground resistance measurement according to claim 1, characterized in that: the single chip microcomputer system circuit comprises a reset circuit, a clock circuit and a power circuit which are connected to the single chip microcomputer, wherein the clock circuit is externally connected with a crystal oscillator on two pins of the single chip microcomputer, and then the two pins are respectively connected into two capacitors C2 and C3.

3. The automatic winding device of the direct current motor for the ground resistance measurement according to claim 1, characterized in that: the key control module is provided with at least 5 keys which are respectively used for controlling forward rotation, reverse rotation and inching control and can adjust acceleration and deceleration.