Brushless motor variable amplitude square wave drive system
A brushless motor and drive system technology, applied in the control system, motor control, DC motor speed/torque control, etc., can solve the problems of heavy radiator, high cost, large heat generation, etc., to reduce the overall cost and reduce heat generation. Effect
Active Publication Date: 2020-05-19
上海正硅实业发展有限公司
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Problems solved by technology
[0005] In order to solve the defects of relatively high heat generation, relatively complicated circuit, relatively high cost, and relatively heavy radiator in the prior art, the present invention provides a brushless motor variable-amplitude square-wave drive system, which The system only changes the voltage range, so that the entire motor ESC drive module has the characteristics of simplicity, lightness, and low heat
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[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.
[0027] In the power system of traditional brushless motors, the output of each motor ESC drive module is a fast square wave, its frequency is fast, the voltage of the square wave is fixed, the fundamental frequency is fixed, and the duty cycle is variable. These series of tasks The mechanism leads to relatively large heat generation, relatively complex circuit, relatively high cost, and relatively heavy heat sink for each motor ESC drive module. In view of the prior art, the present invention provides a variable-amplitude square-wave drive system for brushless motors. The system does not need to adjust the duty cycle, but only needs to control the voltage amplitude, which makes the entire motor ESC drive module simpler and more efficient. It is lighter, generates less heat, and does not require ...
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The invention relates to the technical field of brushless electric machine control, particularly relates to a rapid variable-amplitude square wave driving system of a brushless electric machine. Through additionally arranging a control system and a DC-DC transformer correspondingly connected with the control system in the variable-amplitude square wave driving system of the brushless electric machine and through controlling the DC-DC transformer, variable-amplitude square waves rolling with time and having adjustable voltage amplitude and unchanged duty ratio can be output so as to further generate envelope waves in a three-phase stator winding to form a rotating magnetic field. According to the technical scheme disclosed by the invention, adjustment of the duty ratio is not in need and only voltage amplitude needs to be controlled; therefore, a voltage adjusting driver module of the whole motor becomes simpler and lighter with low heat generated; in addition, no radiator is needed, thereby reducing the overall cost.
Description
technical field [0001] The invention relates to the technical field of brushless motor control, in particular to a fast variable amplitude square wave drive system of the brushless motor. Background technique [0002] The DC brushless motor is mainly composed of the motor body and the built-in motor ESC drive module. It is a typical mechatronics product. The stator winding of the motor body is in a three-phase symmetrical star connection, which is very similar to the three-phase asynchronous motor. In order to meet the needs of the modern brushless motor control field, the brushless DC motor will be used in the future market with its linear mechanical and adjustment characteristics, as well as high power density, strong overload capacity, convenient speed regulation, good dynamic characteristics, high efficiency, and low noise. A series of low-level advantages have gradually become a development trend. [0003] As far as the current technology is concerned, the power system...
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IPC IPC(8): H02P7/292
CPCH02P7/292H02P2209/05
Inventor 吴协祥何利科窦永昌戴雪峰李海峰
Owner 上海正硅实业发展有限公司