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Starting device for direct-current brushless motor without induction component and starting method

A brushless DC, starting device technology, applied in the starting device, electrical components, electronic commutation motor control and other directions, can solve problems such as inability to determine the motor steering, failure to start the motor, and misjudgment of the motor steering.

Active Publication Date: 2012-04-04
AMTEK SEMICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the motor drive system of the brushless DC motor without induction components is initially in a static state, so the phase of the rotor cannot be determined in advance, and even after the start-up circuit 11 is activated, the direction of rotation of the motor may not be determined; The anti-noise ratio of the back electromotive force (BEMF) provided by the feedback circuit is not enough to confirm the starting state of the motor when the motor starts, so it is easy to cause misjudgment of the motor steering and the result of the motor starting failure

Method used

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  • Starting device for direct-current brushless motor without induction component and starting method
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  • Starting device for direct-current brushless motor without induction component and starting method

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Embodiment Construction

[0019] The present invention mainly discloses a starting device for a brushless DC motor without an induction component with two-stage starting. The starting device provides different starting frequency gains to judge the starting state of the motor, and the back electromotive force is fed back through phase detection. The circuit provides the state of the motor speed and phase, and then feedbacks the motor starting circuit to achieve the effect of correct starting and speed control of the motor.

[0020] First, please refer to image 3 , is a schematic block diagram of the non-inductive component DC brushless motor system with two-stage starting function of the present invention. Such as image 3 As shown, the DC brushless motor system without inductive components includes a control device 30, whose input end is connected to the oscillation device 31; the input end of the switching device 32 is connected to the control device 30, and the output end is connected to the starti...

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Abstract

The utility model relates to a starting device for a direct-current brushless motor without an induction component. The starting device comprise a starting circuit, a phase detecting circuit, a motor phase rotating driver and a motor driving circuit, wherein the phase detecting circuit is used for detecting the output frequency of the starting circuit; and the detected frequency is judged according to starting modes of two stages so as to decide whether the motor is successfully started, or the motor must be restarted, thereby achieving the purpose of correctly and stably starting the motor.

Description

technical field [0001] The present invention relates to a DC brushless motor without inductive components and its starting method, in particular to a motor starting device using two-stage starting, and the DC brushless motor without inductive components is judged by the speed of the two-stage motor Whether the startup has been completed to achieve the correct startup of the brushless DC motor without induction components. Background technique [0002] As far as the previous technology of starting the brushless DC motor without induction components is concerned, a starting circuit is used to output different starting frequencies, and then through the control circuit to output different driving currents, and the driving current passes through the external motor After driving the coil to make the motor rotate, the external detection voltage is detected by the detection circuit through the feedback to determine the starting state of the motor, so as to achieve the effect of corr...

Claims

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Application Information

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IPC IPC(8): H02P6/20H02P6/18H02P6/17H02P6/182H02P6/21
Inventor 李灯辉刘展志
Owner AMTEK SEMICON