来源：http://www. 发布时间：2019-07-24 浏览：次
相对有刷电机，无刷电机的命名好了解很多，普通它由四个数字组成，例如2040无刷电机 。这个数字仅代表电机的外形尺寸，2040表示直径为20mm，长度为40mm的电机 。同理3650无刷电机表示此电机直径36mm，长度50mm 。
Compared with brushless motors, brushless motors are well known for their naming. Generally, they are composed of four numbers, such as 2040 brushless motors. This figure only represents the size of the motor. 2040 represents a motor with a diameter of 20 mm and a length of 40 mm. Similarly, the 3650 brushless motor is 36mm in diameter and 50mm in length.
In fact, 370 brushless motor is the same size as 2530 brushless motor, 540 motor is the same size as 3650 brushless motor.
Characteristics of Brushless Motor
1. There is no carbon brush. In theory, the rotor does not need to be connected with the outside conductor.
2. In the process of operation, the speed of the brushless motor is determined by the frequency of alternating current, so the higher the frequency, the faster the brushless motor can rotate.
3、无刷电机的转速是严厉依照KV值设定的，1000KV表示每一福特电机转速加快1000转 。所以电压为5V时，1000kv的无刷电机转速5000rpm 。
3. The speed of the brushless motor is set strictly according to the KV value. 1000KV means that the speed of each Ford motor is increased by 1000 revolutions. So when the voltage is 5V, the speed of 1000kV brushless motor is 5000rpm.
4、在运转过程中，同样转速电机的扭 力是靠电调输出的电流强度决议的，电流越大扭 力越大 。(理想状态下，我们“聪明”的无刷电调会不时“监测”我们的电机能否需求更大的扭 力，同时也会保证扭 力不过剩，以免糜费表情)
4. In the process of operation, the torque of the motor with the same speed is determined by the current intensity output by electric regulation. The greater the current, the greater the torque. (Ideally, our "smart" brushless tuning would "monitor" from time to time whether our motors need more torque, but also ensure that the torque is not excessive, so as not to waste expression)
Brushless Motor with Outer and Inner Rotors
上面无刷电机工作原理图所示的是内转子无刷电机，望文生义，磁铁在里边 。而外转子无刷电机则相反，它的磁铁“包”在外面 。而A、B、C电极在里边 。这样的设计能够让电机的扭 力更大，但转速却上不来 。在模型中，普通外转子无刷电机的KV值在2000以内，而内转子无刷电机则能够到8000-9000kv 。由于这个缘由，普通飞机上常见外转子无刷电机，而模型车和模型船普通都运用内转子无刷电机 。
The working principle diagram of the brushless motor above shows the inner rotor brushless motor. The magnet is inside. On the contrary, the outer rotor brushless motor has its magnet "wrapped" outside. The A, B and C electrodes are inside. Such a design can make the motor more torsional, but the speed is not up. In the model, the KV value of the ordinary outer rotor brushless motor is less than 2000, while the inner rotor brushless motor can reach 8000-9000 kv. For this reason, brushless motor with outer rotor is common in common aircraft, while brushless motor with inner rotor is commonly used in model vehicle and model ship.
Feeling Brushless and Senseless Brushless
要阐明这个问题首先要弄懂感是感的啥~，有感无刷中的感是指“霍尔传感器”，那么什么是“霍尔”呢？霍尔是指的霍尔效应，这一现象是美国物理学家霍尔（A.H.Hall，1855—1938）于1879年在研讨金属的导电机构时发现的 。当电流垂直于外磁场经过导体时，在导体的垂直于磁场和电流方向的两个端面之间会呈现电势差，这一现象便是霍尔效应 。这个电势差也被叫做霍尔电势差 。
To clarify this problem, first of all, we need to understand what sensation is. Sensation in brushless sensation refers to "Hall sensor". So what is "Hall"? Hall refers to the Hall effect, which was discovered by American physicist A. H. Hall (1855 - 1938) in 1879 when he studied the conductive mechanism of metals. When the current passes through the conductor perpendicular to the external magnetic field, there will be a potential difference between the two ends perpendicular to the magnetic field and the current direction. This phenomenon is Hall effect. This potential difference is also called Hall potential difference.
那么我们为什么要感应这玩意？要说清这个问题就必需从无感无刷的一个缺陷说起 。方才说了无刷电机的转速是靠交流电频率决议的，那么电调要想方设法弄明白目前电机的转速以及当前电机的状态 。其实这对曾经正常运转的电机来说很容易，但关于一个刚刚起步或者运转速度很慢的电机来说就显得比拟费事了(很难较精确的测出电机转速的状态)，所以无感无刷电时机在低速时线性不好以至可能会哆嗦，而起步的扭 力也难以强过同等级有刷电机 。
So why do we feel this thing? To clarify this problem, we must start with a defect of senseless brushless. It was just said that the speed of brushless motor is determined by AC frequency, so the electric regulation should try to find out the speed of the motor and the current state of the motor. In fact, it's easy for a motor that used to run normally, but it's more difficult for a motor that just started or operated slowly (it's difficult to measure the speed of the motor more accurately), so the linearity of the brushless induction timing is not good at low speed, so it may tremble, and the starting torque is also difficult. It is better than brush motor of the same grade.
However, it is found that no matter what operating state of the brushless motor, its Hall effect is obvious, so it is easy to know the operating state of the high-speed or low-speed motor through Hall effect adjustment, thus dealing with the shortcomings of the induction brushless motor! But at present, Hall sensor is not a low price, so the price of sensorless brushless motor and electric regulation will be much higher than that of sensorless brushless.
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