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DC motor control method

A technology of DC motor and control method, which is applied in the direction of DC motor speed/torque control, excitation or armature current control, control system, etc., and can solve the problem of increasing the computational burden of the microprocessor 901, increasing memory usage, and wasting time and other issues, to achieve the effect of reducing usage and computing burden

Inactive Publication Date: 2008-03-05
FUGANG ELECTRONICS DONGGUAN +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned DC motor control method has the following disadvantages, first: the use of multiplication and division to calculate the Duty value not only increases the computing burden of the microprocessor 901 but also increases the usage of the memory
Second: Using the look-up table method to obtain the control value of the DC motor needs to input huge data into the memory in advance, which will increase the usage of the memory
Third: Using the look-up table method to obtain the control value of the DC motor must be compared with the Duty value in order to obtain the control value of the DC motor. The process is not only cumbersome but also takes a lot of time.

Method used

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Embodiment Construction

[0030] In order to describe in detail the technical content, structural features, achieved goals and effects of the present invention, the following specific examples are given and described in detail with reference to the drawings.

[0031] 1, the DC motor control device 100 of the present invention is composed of a microprocessor 101, a drive unit 103, a power switch 105, a DC motor 107, a DC motor voltage detection unit 109, and a DC motor voltage feedback unit 111. In the embodiment of the present invention, the microprocessor 101 is an 8-bit microprocessor, and the DC motor 107 is a DC motor for a car fan.

[0032] Please refer to FIG. 3 and FIG. 2 again. The DC motor control method 200 of the present invention is as follows. In step 201, the microprocessor 101 of the DC motor control 100 first receives the periodic signal of the vehicle motor. In the embodiment of the present invention , the periodic signal of the vehicle motor is a square wave signal (see Figure 2), and...

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Abstract

This invention discloses a control method for DC motors, in which, a microprocessor receives a motor periodic signal and gets its work period value then utilizes a dichotomy and a displacement method to compute the period value of the work of the motor matched with a transfer function formula to reduce volumes of memories and operations and get a target control value quickly and transfers a frequency signal to a drive unit in light of the target control value to drive a power switch to control output power of the DC motor, a feedback unit gets the state of the motor and feeds back the signal value to the microprocessor, which compares values of the feedback signal and the target signal and adjusts the frequency signal output to the drive unit to control output power of the DC motor.

Description

Technical field [0001] The invention relates to a DC motor control method, in particular to a method for controlling the output power of the DC motor. Background technique [0002] As DC motors are increasingly used in daily life, and their functional requirements are constantly changing, they are no longer limited to fixed full-speed operation. Therefore, how to efficiently control the output power of DC motors to make the output of DC motors Power can be quickly adjusted to meet demand is the current topic. [0003] Please refer to Fig. 7, a kind of existing DC motor control method comprises: first by the microprocessor 901 of DC motor control device 900 receiving a vehicle motor cycle signal and obtain motor actual working time value (WT) and by this cycle signal After the cycle time value CT), the microprocessor 901 first utilizes the multiplication and division method to obtain the actual input duty cycle value (Duty), as shown in the following function: [0004] Duty...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P7/00H02P7/06H02P7/18H02P6/08
Inventor 陈龙桔
Owner FUGANG ELECTRONICS DONGGUAN
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