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High-temperature long-distance sensorless direct-current brushless motor driving device

A brushless DC motor and driving device technology, which is applied in the starting device, electronic commutation motor control, electrical components, etc., can solve the problems of normal start and operation of the DC brushless motor that are not mentioned, and achieve the reduction of PWM signal feedback. The effect of the influence of electromotive force noise

Active Publication Date: 2020-04-17
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

Existing documents and patents do not mention the relevant technologies for the normal startup and operation of brushless DC motors in this environment

Method used

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  • High-temperature long-distance sensorless direct-current brushless motor driving device
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  • High-temperature long-distance sensorless direct-current brushless motor driving device

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Embodiment Construction

[0020] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0021] High temperature long distance position sensorless brushless DC motor drives such as figure 1 As shown, including industrial-grade 125°C high-temperature MCU (stable operation at high temperature of 150°C), 6 inverters (74HC14D), IGBT drivers (IR2233), 6 175°C junction temperature IGBTs (Q1, Q2, Q3, Q4 , Q5, Q6) and RCD absorption protection circuit. Industrial-grade 125°C high-temperature MCU can work stably in a high-temperature environment of 125°C. Available models include: sm320f28335gbs, sm320f28335ptps, etc.; 175°C junction temperature IGBT can work stably in a high-temperature environment of 175°C. Available models include: h20r1203, k75t60 etc.

[0022] Industrial-grade 125°C high-temperature MCU outpu...

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Abstract

The invention provides a high-temperature long-distance sensorless direct-current brushless motor driving device. The industrial-grade 125 DEG C high-temperature MCU outputs six paths of PWM signals which are used as driving signals through six phase inverters. The input end of each phase inverter is connected with a pull-down resistor; the inverted driving signal is sent to an IGBT driver for driving six 175 DEG C junction temperature IGBTs; six RCD protection circuits are respectively connected between collectors and emitters of the six 175 DEG C junction temperature IGBTs; 1K ohm gate resistors are respectively added between the gates of the six 175 DEG C junction temperature IGBTs and the IGBT driver; the gate of each 175 DEG C junction temperature IGBT is connected with a voltage stabilizing tube, the counter electromotive force of the direct-current brushless motor and the bus voltage VDC are subjected to voltage division through eight divider resistors, and signals obtained after voltage division are sent to ADC0-ADC3 of the industrial-grade 125 DEG C high-temperature MCU so that the MCU can sample the counter electromotive force.

Description

technical field [0001] The invention belongs to the technical field of industrial control, and in particular relates to a high-temperature long-distance sensorless DC brushless motor driving device. Background technique [0002] Due to its simple structure, reliable operation and high efficiency, brushless DC motors have been widely used in industry, aerospace and other fields. When the DC brushless motor is running, the stator winding must be correctly commutated according to the rotor position in order to generate a rotating magnetic field. The rotor position information can be obtained through an external position sensor, which not only increases the cost and size of the motor, but also controls the motor. The influence of the reliability and installation accuracy. In some special high temperature and high pressure harsh environments, for example, the motor is located in high pressure hydraulic oil, or it is used in oil well logging and automotive electronic products whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/18H02P6/182H02P6/20
CPCH02P6/18H02P6/182H02P6/20
Inventor 赵娟佘锦华吴敏熊永华李东明
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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