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DC — Readiness of a vacuum cleaner

机译：DC - 真空吸尘器的准备

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This paper proposes a way to supply a vacuum cleaner from a DC grid instead from an AC grid. Problems caused by the transition from an AC supply to a DC supply will be discussed, like the high inrush current during turn-on and the arc that occurs when a mechanical switch is used to turn-off. These problems will be solved in a low-cost manner. Therefore, a power MOSFET is used to control the motor of the vacuum cleaner. A simple PWM controller is used to control the MOSFET, thus the motor. This PWM controller limits the inrush current with a current sensing feature which turns the PWM controllers output OFF when the peak-current exceeds the threshold value. Furthermore, the ON/OFF button of the vacuum cleaner is also connected to the PWM controller. Turning off the vacuum cleaner will also turn off the output of the PWM controller. Because of this the motor will gradually slow down, the current is regulated towards zero and this prevents a current arc. A prototype was build inside the housing of the vacuum cleaner to validate the design. The experimental tests prove the functionality of the circuit by testing the control of the motor and current sensing feature. Finally, de result of the tests will be discussed and recommendation for possible improvements or alternative designs will be given.
机译：本文提出了一种方法来从DC网格提供从AC电网提供真空吸尘器。将讨论由从AC供应到DC电源的转换引起的问题，如启动期间的高浪涌电流，当机械开关用于关闭时发生的电弧。这些问题将以低成本的方式解决。因此，功率MOSFET用于控制真空吸尘器的电动机。简单的PWM控制器用于控制MOSFET，从而使用电动机。该PWM控制器利用电流检测特征限制了浪涌电流，当峰值电流超过阈值时，将输出PWM控制器输出。此外，真空吸尘器的开/关按钮也连接到PWM控制器。关闭真空吸尘器也将关闭PWM控制器的输出。因此，电动机将逐渐减慢，电流被调节为零，这可以防止电弧。在真空吸尘器的外壳内部构建原型，以验证设计。实验测试通过测试电动机和电流传感特征的控制来证明电路的功能。最后，将讨论测试的结果，并将提供可能改进或替代设计的建议。

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