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DC (Direct Current) motor driving circuit and control method thereof

A drive circuit and DC motor technology, which is applied to the starter of a single DC motor, the deceleration device of the DC motor, the starter of the motor, etc., can solve the problems of carbon brush carbon film aging, position error, low precision, etc. The effect of small PCB space, increased space capacity, and reduced manufacturing cost

Inactive Publication Date: 2013-04-17
BONAIRE AUTOMOTIVE ELECTRICAL SYST
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

For example, if the accuracy of the carbon film is 1%, there will be a position error of 1%, plus the aging of the carbon film of the carbon brush during the operation of the motor, the accuracy will be lower than 1%.

Method used

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  • DC (Direct Current) motor driving circuit and control method thereof

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Embodiment Construction

[0025] Referring to the accompanying drawings, through the description of the embodiments, the specific embodiments of the present invention include the shape, structure, mutual position and connection relationship of each part, the function and working principle of each part, and the manufacturing process of the various components involved. And the method of operation and use, etc., are described in further detail to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concepts and technical solutions of the present invention.

[0026] The DC motor drive circuit takes up less space on the PCB to achieve the purpose of increasing the space capacity in the car, reducing the wiring harness, and realizing forward and reverse operation by controlling the direction of the motor current. The reduction in the number of wiring harnesses makes the external wiring simple.

[0027] see figure 1 It can be seen that the MCU main control c...

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Abstract

The invention discloses a DC (Direct Current) motor driving circuit and a control method thereof. An MCU (Micro Controller Unit) master control chip of the circuit is connected with a power supply by a power supply transformation and filtering circuit and connected with a motor control key by a key scanning circuit. The running step number and state signals of a motor are output to a display device by the MCU master control chip through a position and state display circuit, and driving signals are output to an internal and external circulating motor, a hybrid air valve motor and a mode motor of an automobile air conditioner by a motor driving chip. The structure of the circuit occupies small space of a PCB (Printed Circuit Board), and a purpose of increasing the interior space capacity of an automobile is achieved. Carbon film feedback is not required by the DC motor, the running of the motor can be accurately controlled by only two driving wires, the manufacture cost is lowered, the position of the hybrid motor is adjusted in real time by a computer, and a complicated process from a correction program to a compiling program to an e-writing program is not required in calibration.

Description

technical field [0001] The invention relates to an automobile air conditioner control circuit, in particular to a carbon-film-free feedback DC motor drive circuit. Background technique [0002] With the miniaturization of modern cars, the enlargement of the interior space, and the requirements of the weight of the body and energy saving, the DC motor drive circuit used in the car air conditioner is increasingly unable to meet the requirements of the car equipment. [0003] At present, the drive circuit of the DC motor in the automotive air conditioner controller is controlled by a dedicated chip, such as TLE4208, which uses a non-bus structure, which occupies more IO ports of the MCU, which is not conducive to driving more motors and reducing PCB space. . [0004] The traditional embedded driver is based on the front-end and back-end methods. This program architecture introduces a task scheduling mechanism to avoid delay processing when each task is running. At present, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P1/54H02P1/22H02P3/08
Inventor 彭昊
Owner BONAIRE AUTOMOTIVE ELECTRICAL SYST
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