CN219760885U

CN219760885U - High temperature resistant motor pulse controller

Info

Publication number: CN219760885U
Application number: CN202321258792.3U
Authority: CN
Inventors: 王增浩; 彭大龙
Original assignee: Tianjin Zhaohua Electronic Technology Co ltd
Current assignee: Tianjin Zhaohua Electronic Technology Co ltd
Priority date: 2023-05-23
Filing date: 2023-05-23
Publication date: 2023-09-26
Anticipated expiration: 2033-05-23

Abstract

The utility model discloses a high-temperature-resistant motor pulse controller which comprises a main control module, a Hall processing module, a conversion module and an output module, wherein the main control module is connected with the Hall processing module; the main control module consists of a high-speed DSP chip and a peripheral circuit, a clock processing circuit is arranged in the DSP chip, and voltage, current and Hall signals can be collected at high speed through the DSP chip; the Hall processing module comprises a Hall sensor, and preprocessing and filtering are carried out on Hall signals through the Hall sensor; the conversion module comprises a DCDC module and an LDO chip, the DCDC module converts a high power supply into a low voltage, and the LDO chip stabilizes the voltage and converts the voltage into a low level; the output module comprises a DSP processor, and PWM signal output is controlled by the DSP processor. The controller can stably work at 155 degrees for a long time. Through preset speed or real-time communication control, the motor pulse controller can generate PWM signals with different duty ratios to control signals with different levels of the three-phase full-bridge power output circuit.

Description

High temperature resistant motor pulse controller

Technical Field

The utility model relates to the technical field of drilling equipment, in particular to a high-temperature-resistant motor pulse controller.

Background

The existing motors used for underground logging instruments are mostly direct-current brush motors and alternating-current asynchronous motors, when the direct-current brush motors are used in a high-temperature environment, the brush loss is extremely high, the service life is short, the comprehensive cost is very high, the alternating-current asynchronous motor is an induction excitation motor, compared with the direct-current motors, the alternating-current asynchronous motor has no brush, has the advantages of simple structure, leather and durability and the like, but has the defects of lower efficiency and extremely high starting current, when the direct-current brush motor is used underground, the alternating-current asynchronous motor is difficult to start abnormally due to the long-distance transmission problem, the direct-current brushless motor has the high efficiency of the direct-current motor and the reliability of the alternating-current asynchronous motor, the direct-current brushless motor adopts an electronic device for reversing, the performance is reliable, the service life is prolonged by a plurality of times compared with the brush motor, and represents the future development direction, and the main advantages are high efficiency and small size;

because the logging instrument generally works in an oil well, the ambient temperature is far higher than the surface temperature, the highest temperature can reach more than 150 ℃, and the existing motor driver cannot be qualified in a high-temperature environment, therefore, a high-temperature-resistant motor pulse controller needs to be designed to solve the problems.

Disclosure of Invention

The utility model aims to solve the defects in the prior art, and provides a high-temperature-resistant motor pulse controller which can stably work at 155 ℃ for a long time. Through preset speed or real-time communication control, the motor pulse controller can generate PWM signals with different duty ratios to control signals with different levels of the three-phase full-bridge power output circuit.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a high temperature resistant motor pulse controller comprises a main control module, a Hall processing module, a conversion module and an output module; the main control module consists of a high-speed DSP chip and a peripheral circuit, a clock processing circuit is arranged in the DSP chip, and voltage, current and Hall signals can be collected at high speed through the DSP chip; the Hall processing module comprises a Hall sensor, and the Hall sensor is used for preprocessing and filtering a Hall signal and then sending the signal to the main control module; the conversion module comprises a DCDC module and an LDO chip, the DCDC module is used for converting a high power supply into a low voltage, and the low voltage is converted into a low level through the LDO chip in a voltage stabilizing way; the output module comprises a DSP processor, and PWM signal output is controlled by the DSP processor.

Preferably, a singlechip and a main control circuit are arranged in the main control module, and a control circuit and a grid driving circuit are arranged in the main control circuit.

Preferably, the clock in the clock processing circuit may be doubled to 150MHz.

Preferably, the model of the singlechip is STM32F103ZET6.

Preferably, a +24v power supply is arranged in the conversion module.

Compared with the prior art, the device has the advantages that:

1. compared with the prior art, the controller can receive an upper computer control command, generate motor control information according to the command, process and generate motor position information by collecting motor Hall signals, collect motor supply voltage and current signals, generate motor state information, monitor over-current and under-voltage states, and generate a reversing drive PWM pulse signal circuit through PID control according to the control information, the motor position information and the state information, so that the circuit can stably work at 155 ℃.

Drawings

FIG. 1 is a block flow diagram of a high temperature resistant motor pulse controller according to the present utility model;

FIG. 2 is a schematic diagram of the wiring of a DCDC switching power supply module;

FIG. 3 is a schematic diagram of the wiring of the LDO linear voltage regulator module;

FIG. 4 is a schematic diagram of the wiring of a Hall sensor power supply circuit;

FIG. 5 is a schematic diagram of wiring of a Hall sensor signal processing circuit;

FIG. 6 is a schematic diagram of the wiring of a voltage/current adoption processing circuit;

FIG. 7 is a schematic diagram of the wiring of a DSP and its peripheral circuitry;

FIG. 8 is a schematic diagram of the wiring of the software PID process flow;

fig. 9 is a diagram of a wiring pin.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-9, a high temperature resistant motor pulse controller comprises a main control module, a hall processing module, a conversion module and an output module; the main control module consists of a high-speed DSP chip and a peripheral circuit, a clock processing circuit is arranged in the DSP chip, the clock in the clock processing circuit can be doubled to 150MHz, and the DSP chip is internally provided with an ADC conversion function and can collect voltage, current and Hall signals at high speed; the chip instruction execution time is short, the speed is high, the control command, the position and the state information can be processed rapidly, PWM signals are generated in a PID regulation mode, a singlechip and a master control circuit are arranged in the master control module, the model of the singlechip is STM32F103ZET6, and a control circuit and a grid drive circuit are arranged in the master control circuit;

the Hall processing module comprises a Hall sensor, a Hall sensing circuit is arranged in the Hall processing module, power is supplied to the Hall sensor, preprocessing and filtering are carried out on Hall signals, and then the signals are sent to the main control circuit.

The conversion module is mainly used for carrying out sampling, filtering, amplifying, limiting and other treatments on the voltage and current signals of the motor, and sending the treated current signals to the control circuit and the grid driving circuit for protection and monitoring.

The switching module comprises a DCDC module and an LDO chip, wherein a +24V power supply is arranged in the switching module, the switching module can switch the +24V power supply into low-voltage power supply required by a control circuit, the DCDC module and the LDO chip are utilized, a high-temperature DCDC switching and LDO level switching combination mode is adopted, the high-power supply is firstly switched into low voltage through the high-efficiency DCDC module, then the low level required by the singlechip is switched through the low-voltage differential LDO chip in a voltage stabilizing way, the efficiency and the low ripple are both considered, the stable circuit performance is ensured, the ripple of the power supply can be ensured to be less than 10mV without a large energy storage capacitor after the linear voltage stabilization of the LDO chip is realized, and the stable work of the singlechip is ensured without burrs generated during the switching of a DCDC switching tube.

The output module comprises a DSP processor, and PWM signal output is controlled by the DSP processor.

After receiving a speed setting instruction of the upper computer, the main control circuit generates a control signal required by motor commutation through speed PID control according to the acquired position information, voltage and current information. The control signal is TTL level signal, and contains 3 paths of high-end control levels and three paths of low-end control levels required by the three-phase full-bridge reversing module.

The pulse controller circuit board is strictly designed in a high-low voltage separation mode during wiring, heat is transmitted to the bottom surface of the circuit board in a large-area copper-clad and window-opening mode, then the circuit board is tightly connected with an instrument framework through an insulating and high-heat silica gel pad, and the whole heat dissipation of the aluminum alloy framework is realized, so that the instrument is ensured to have no heat accumulation and no high temperature difference at high temperature.

The present utility model is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present utility model and the inventive concept thereof, can be replaced or changed within the scope of the present utility model.

Claims

1. A high temperature resistant motor pulse controller is characterized in that: the device comprises a main control module, a Hall processing module, a conversion module and an output module;

the main control module consists of a high-speed DSP chip and a peripheral circuit, a clock processing circuit is arranged in the DSP chip, and voltage, current and Hall signals can be collected at high speed through the DSP chip;

the Hall processing module comprises a Hall sensor, and the Hall sensor is used for preprocessing and filtering a Hall signal and then sending the signal to the main control module;

the conversion module comprises a DCDC module and an LDO chip, the DCDC module is used for converting a high power supply into a low voltage, and the low voltage is converted into a low level through the LDO chip in a voltage stabilizing way;

2. A high temperature resistant motor pulse controller as set forth in claim 1, wherein: the master control module is internally provided with a singlechip and a master control circuit, and the master control circuit is internally provided with a control circuit and a grid driving circuit.

3. A high temperature resistant motor pulse controller as set forth in claim 1, wherein: the clock in the clock processing circuit may be doubled to 150MHz.

4. A high temperature resistant motor pulse controller as defined in claim 2, wherein: the model of the singlechip is STM32F103ZET6.

5. A high temperature resistant motor pulse controller as set forth in claim 1, wherein: and a +24V power supply is arranged in the conversion module.