阅读说明：本技术 一种调压调速系统脉冲触发板 (Pulse trigger board of voltage and speed regulating system ) 是由 王展英 潘丽 许成 马有亮 于 2019-09-11 设计创作，主要内容包括：本发明公开了一种调压调速系统脉冲触发板,包括电压变换电路、方向信号变换电路、同步电压信号变换电路、同步电压信号与速度给定信号组合电路、方向使能信号与同步电压信号振荡电路、同步变压器的脉冲触发电路和外部接线端子,所述电压变换电路接收电源电压并经过转换后分别输出给主控板接口和同步电压信号与速度给定信号组合电路。本发明针调压调速系统脉冲触发板有效降低了现有的调压调速系统运行过程中的故障率,同时电路部分采用插拔端子,使安装、更换更加方便。(The invention discloses a pulse trigger board of a voltage-regulating and speed-regulating system, which comprises a voltage conversion circuit, a direction signal conversion circuit, a synchronous voltage signal and speed given signal combination circuit, a direction enable signal and synchronous voltage signal oscillation circuit, a pulse trigger circuit of a synchronous transformer and an external wiring terminal, wherein the voltage conversion circuit receives power supply voltage, converts the power supply voltage and outputs the converted power supply voltage to a main control board interface and the synchronous voltage signal and speed given signal combination circuit respectively. The pulse trigger plate for the voltage and speed regulating system effectively reduces the failure rate of the existing voltage and speed regulating system in the operation process, and meanwhile, the circuit part adopts a plug terminal, so that the installation and the replacement are more convenient.)

1. A pulse trigger board of voltage-regulating and speed-regulating system is composed of voltage converter, direction signal converter, synchronous voltage signal and speed setting signal combiner, direction enable signal and synchronous voltage signal oscillator, pulse trigger circuit of synchronous transformer and external connecting terminal, and features that said voltage converter receives power supply voltage and converts it to be output to main control board interface and synchronous voltage signal and speed setting signal combiner, said main control board interface is also connected to direction signal converter and communicates with main control board, said main control board interface also outputs direction enable signal to direction enable signal and synchronous voltage signal oscillator, said main control board interface also outputs speed setting signal to synchronous voltage signal and speed setting signal combiner, and the input of synchronous voltage signal and speed setting signal combiner is also connected to synchronous voltage signal converter, the output end of the synchronous voltage signal and speed given signal combination circuit is connected with a direction enabling signal and synchronous voltage signal oscillating circuit, and the direction enabling signal and synchronous voltage signal oscillating circuit is also connected with a pulse trigger circuit of a synchronous transformer.

2. The pulse trigger board of claim 1, further comprising a fault determining circuit, wherein the fault determining circuit is connected to the temperature control circuit and outputs a fault signal to the interface of the main control board, the detection of the fault determining circuit comprises detection of the main loop power supply and temperature control detection, and the detection of the main loop power supply comprises open-phase detection and phase sequence detection.

3. The pulse trigger board of claim 2, wherein the direction enable signal and synchronous voltage signal oscillating circuit comprises an oscillating circuit LT1, an oscillating circuit LT2, an oscillating circuit LT3, an oscillating circuit LT4 and an oscillating circuit LT 5.

4. The pulse trigger board of the voltage and speed regulating system according to claim 3, wherein the pulse trigger circuit of the synchronous transformer comprises a pulse transformer, a trigger circuit LT1, a trigger circuit LT2, a trigger circuit LT3, a trigger circuit LT4 and a trigger circuit LT 5.

5. The pulse trigger board of claim 4, wherein the input voltage of the voltage conversion circuit is 24VDC, and the output voltage is 15 VDC.

6. The pulse trigger board of claim 5, wherein the synchronous voltage signal transformation circuit collects three-phase synchronous voltages, and generates six synchronous pulses after passing through the composition comparison circuit of the operational amplifier, the synchronous pulses are transformed into trapezoidal wave negative voltage signals after passing through the waveform transformation, and the trapezoidal wave negative voltage signals are compared with the positive voltage signals with a given speed output by the main control board to generate six trigger pulses.

7. The pulse trigger board of claim 3, wherein the trigger circuit LT1, the trigger circuit LT2, the trigger circuit LT3, the trigger circuit LT4 and the trigger circuit LT5 have the same structure and are all silicon controlled trigger circuits, the pulse trigger signal is isolated by a pulse transformer, and the output pulse at the secondary side triggers the conduction of silicon controlled.

8. The pulse trigger board of the voltage and speed regulating system according to claims 1-7, wherein the interface circuit of the main control board adopts 20-pin terminals, is connected by a flat cable, sends power and fault signals to the main control board, and receives direction signals, enable signals and speed signals of the main control board.

Technical Field

The invention relates to a trigger plate, in particular to a pulse trigger plate of a voltage and speed regulating system.

Background

The voltage regulation and speed regulation means that the terminal voltage of the motor is regulated to realize stepless speed regulation of the motor in a certain rotating speed range. The advantage is that the motor operates steadily in the whole speed regulating range. The speed regulation range is also the largest, and the starting voltage of the motor can be regulated to the rated voltage; the PWM speed regulation has the advantages of high efficiency and continuous speed regulation range, and has the disadvantages of pulsation, increased noise and more serious load when the motor runs at the lowest rotating speed.

The circuit board of the existing operating voltage-regulating and speed-regulating system is old, the failure rate is high, the spare parts are difficult to purchase and maintain, the replacement exists in use, the detection is inconvenient, and the circuit board is easy to damage in the transportation process. Therefore, technology updating is needed, and the method can be better suitable for field application.

Disclosure of Invention

The invention aims to provide a pulse trigger board of a voltage and speed regulating system, which aims to solve the problems in the background technology.

In order to realize the purpose, the invention provides the following technical scheme:

a pulse trigger board of a voltage-regulating and speed-regulating system comprises a voltage conversion circuit, a direction signal conversion circuit, a synchronous voltage signal and speed given signal combination circuit, a direction enable signal and synchronous voltage signal oscillation circuit, a pulse trigger circuit of a synchronous transformer and an external wiring terminal, wherein the voltage conversion circuit receives power supply voltage, converts the power supply voltage and outputs the converted power supply voltage to a main control board interface and the synchronous voltage signal and speed given signal combination circuit respectively, the main control board interface is also connected with the direction signal conversion circuit respectively and completes communication with a main control board, the main control board interface also outputs a direction enable signal to the direction enable signal and synchronous voltage signal oscillation circuit, the main control board interface also outputs a speed given signal to the synchronous voltage signal and speed given signal combination circuit, and the input end of the synchronous voltage signal and speed given signal combination circuit is also connected with the synchronous voltage signal conversion circuit, the output end of the synchronous voltage signal and speed given signal combination circuit is connected with a direction enabling signal and synchronous voltage signal oscillating circuit, and the direction enabling signal and synchronous voltage signal oscillating circuit is also connected with a pulse trigger circuit of a synchronous transformer.

As a still further scheme of the invention: the fault detection circuit is connected with the temperature control circuit and outputs a fault signal to the main control board interface, the fault detection circuit detects a main loop power supply and temperature control detection, and the main loop power supply detects a phase failure and a phase sequence.

As a still further scheme of the invention: the direction enable signal and synchronizing voltage signal oscillating circuit includes an oscillating circuit LT1, an oscillating circuit LT2, an oscillating circuit LT3, an oscillating circuit LT4, and an oscillating circuit LT 5.

As a still further scheme of the invention: the pulse trigger circuit of the synchronous transformer comprises a pulse transformer, a trigger circuit LT1, a trigger circuit LT2, a trigger circuit LT3, a trigger circuit LT4 and a trigger circuit LT 5.

As a still further scheme of the invention: the input voltage of the voltage conversion circuit is 24VDC, and the output voltage is 15 VDC.

As a still further scheme of the invention: the synchronous voltage signal conversion circuit collects three-phase synchronous voltage, six synchronous pulses are generated after passing through a composition comparison circuit of the operational amplifier, the synchronous pulses are converted into trapezoidal wave negative voltage signals after waveform conversion, and the trapezoidal wave negative voltage signals are compared with given speed positive voltage signals output by the main control board to generate six trigger pulses.

As a still further scheme of the invention: the trigger circuit LT1, the trigger circuit LT2, the trigger circuit LT3, the trigger circuit LT4 and the trigger circuit LT5 have the same structure and are all silicon controlled rectifier trigger circuits, pulse trigger signals are isolated by a pulse transformer, and output pulses on the secondary side trigger the conduction of silicon controlled rectifiers.

As a still further scheme of the invention: the interface circuit of the main control board adopts a 20-pin terminal, is connected by a flat cable, sends a power supply and a fault signal to the main control board, and receives a direction signal, an enabling signal and a speed signal of the main control board.

Compared with the prior art, the invention has the beneficial effects that: the pulse trigger plate for the voltage and speed regulating system effectively reduces the failure rate of the existing voltage and speed regulating system in the operation process, and meanwhile, the circuit part adopts a plug terminal, so that the installation and the replacement are more convenient.

Drawings

FIG. 1 is a system architecture diagram of the present invention;

FIG. 2 is a voltage conversion circuit diagram;

FIG. 3 is a fault detection circuit diagram;

FIG. 4 is a circuit diagram of a synchronous voltage conversion circuit;

FIG. 5 is a waveform diagram of a transition sync pulse;

FIG. 6 is a circuit diagram of comparison of a trapezoidal synchronous voltage signal with a given speed;

FIG. 7 is a circuit diagram of trigger pulse synthesis;

FIG. 8 is a circuit diagram of direction switching;

FIG. 9 is a circuit diagram of a direction, enable signal synthesis;

FIG. 10 is a schematic diagram of a pulse oscillation circuit LT 1;

FIG. 11 is a schematic diagram of a pulse oscillation trigger circuit LT 2;

FIG. 12 is a schematic diagram of a pulse trigger circuit LT 4;

FIG. 13 is a schematic diagram of a pulse oscillation circuit LT 5;

FIG. 14 is a schematic diagram of a thyristor trigger circuit L1-T1;

FIG. 15 is a schematic diagram of thyristor trigger current L1-T3;

FIG. 16 is a schematic diagram of thyristor trigger current L2-T2;

FIG. 17 is a schematic diagram of thyristor trigger current L3-T3;

FIG. 18 is a schematic diagram of a thyristor trigger circuit L3-T1;

FIG. 19 is a connection diagram of thyristors;

FIG. 20 is a circuit diagram of an interface with a main control board;

FIG. 21 is an input circuit diagram of an external power supply;

FIG. 22 is a negative voltage generating circuit diagram;

fig. 23 is a schematic diagram of the pulse trigger circuit LT 3.

FIG. 24 is a main loop sampling circuit diagram.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.