Motor driving device capable of adjusting rotating speed slope of motor
A motor drive and adjustment device technology, applied in the direction of electronic commutation motor control, single motor speed/torque control, control system, etc., can solve the problems of difficult implementation and operation
Active Publication Date: 2015-01-21
AMTEK SEMICON
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[0003] However, when the user wants to change the rotation speed of the motor according to the actual operating state; for example: when the temperature of the central processing unit (CPU) in the personal desktop computer or the NB motherboard increases, in order to achieve a rapid reduction The temperature of the central processing unit, which may require changing the input PWM pulse cycle (Duty Cycle), or changing the coil design of the motor, so that the motor can have a higher motor speed output under the same PWM pulse cycle; but in a In a well-matched system, the above two methods have their operational difficulties
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[0019] The present invention mainly discloses a motor drive device, especially a drive device capable of adjusting the slope of the motor speed, which uses a PWM modulation module that can adjust the PWM pulse to change the input PWM signal, so that the motor operates at the same Under the PWM input signal, the application of different speeds can be achieved, thus further increasing the flexibility of the motor application. In addition, in order to clearly illustrate the operation process of the motor drive module of the present invention, in the following description process, a single-phase motor is used as an example for illustration; however, the application of the present invention is not limited to the application of single-phase motors. It can also be used in polyphase motor applications. At the same time, the single-phase motor or multi-phase motor to be driven by the motor drive module of the present invention is the same as the currently used motor, so in the followin...
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The invention relates to a PWM (pulse-width modulation)control signal of which the input is changed by means of a PWM modulation module, so that a motor can be applied at different rotating speeds under the same PWM control signals, and the application flexibility of the motor is further increased. In addition, the PWM modulation module consists of a PWM modulation direction control circuit, a PWM modulation vector circuit and a PWM modulation signal generation circuit. Obviously, the PWM modulation module is connected with the PWM control signal input by an external system and an external adjustment device, and is set by the adjustment device to change the vector magnitude of the PWM control signal and the modulation direction so as to adjust the pulse cycle of the PWM control signal.
Description
technical field [0001] The present invention relates to a motor driving device, in particular to a driving device capable of adjusting the slope of the motor speed, which uses a PWM modulating module capable of adjusting the PWM pulse to change the input PWM signal, so that the motor operates at the same Under the PWM input signal, the application of different speeds can be achieved, thereby further increasing the flexibility of motor application; in addition, the motor drive device of the present invention can be used in single-phase motors and three-phase motors. Background technique [0002] The traditional way of PWM to control the motor drive is the duty (rotational speed) of the input PWM, which corresponds to the duty of the motor output, such as Figure 1A Shown; for example: when the PWM pulse period (Duty Cycle) is 50%, the motor will output 50% of the speed. Therefore, the control curve of the motor speed will present a linear curve, such as Figure 1B shown. ...
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IPC IPC(8): H02P6/08H02P6/182
Inventor 李灯辉余国庸
Owner AMTEK SEMICON