Features and Principles of Servo Motors

Servo Motors refers to the engine that controls the operation of mechanical components in the servo system and is an auxiliary motor indirect transmission device. Servo Motors can control the speed, the position accuracy is very accurate, and the voltage signal can be converted into torque and rotational speed to drive the controlled object. The rotor speed of Servo Motors is controlled by the input signal and can respond quickly. In the automatic control system, it's used as a selector and has the characteristics of a small electromechanical time constant and high linearity. It can convert the received electrical signal into the motor shaft. The angular displacement or angular velocity output. It is divided into two categories: DC and AC electromechanical devices. Its main feature is that there is no self-rotation phenomenon when the signal voltage is zero, and the speed decreases at a uniform speed with the increase of torque. Next, let's take a look at the characteristics and principles of Servo Motors.

Here is the content list:

l Features of Servo Motors.

l How Servo Motors work.

Features of Servo Motors：

Features of Brushless DC Servo Motors

1. Brushless DC Servo Motors have a small moment of inertia, low starting voltage, and low no-load current.

2. Abandon the contact reversing system, and greatly increase the motor speed, the maximum speed is as high as 100 000rpm.

3. Brushless Servo Motors can realize speed, position, torque, etc. control without an encoder when performing servo control.

4. Brushless DC Servo Motors have no brush wear and tear. In addition to high speed, they also have the characteristics of long life, low noise, and no electromagnetic interference.

Features of DC brushed Servo Motors

1. DC brushed Servo Motors are small in size, fast in action and quick in response, large in overload capacity, and wide in speed regulation range.

2. DC brushed Servo Motors have large torque at low speeds, small fluctuation, and stable operation.

3. DC brushed rotary actuator has low noise and high efficiency.

4. Back-end encoder feedback (optional) constitutes the advantages of DC servo.

5. DC brushed Servo Motors have a large voltage transformation range and adjustable frequency.

How Servo Motors work：

1. The servo system is an automatic control system that enables the output-controlled quantities such as the position, orientation, and state of an object to follow any change in the input target (or given value). Servo mainly relies on pulses for positioning. It can be understood that when High performance, efficiency, and superior control brushless DC servo motors receive a pulse, they will rotate the angle corresponding to one pulse to achieve displacement. Because Servo Motors itself has the function of sending pulses, so Servo Motors When rotating an angle, a corresponding number of pulses will be sent out. In this way, it will echo with the pulses received by Servo Motors, or a closed loop. In this way, the system will know how many pulses are sent to Servo Motors, and how many pulses are received back at the same time. , In this way, the rotation of the motor can be precisely controlled, to achieve precise positioning, which can reach 0.001mm. DC Servo Motors are divided into brushed and brushless motors. Brushed motors are low in cost, simple in structure, large in starting necklace, wide in speed regulation range, easy to control, and bear conservation, but inconvenient conservation( relief of carbon skirmishes), electromagnetic hindrance, and environmental conditions. thus, it can be used in common artificial and civil occasions that are sensitive to cost. The brushless motor is small in size, light in weight, large in the affair, presto in response, high in speed, small in indolence, smooth in gyration, and stable in a necklace. The control is complicated, and it's easy to realize intelligence. Its electronic dicker system is flexible, and it can be a square surge dicker or sine surge dicker. The motor is conservation-free, has high effectiveness, low operating temperature, low electromagnetic radiation, long life, and can be used in colorful surroundings.

2. AC high-response, high-precision positioning are also brushless motors, which are divided into coetaneous and asynchronous motors. Coetaneous motors are generally used in stir control. Its power range is large and it can achieve a large power. Large indolence, low maximum rotational speed, and decreases fleetly as power increases. thus, it's suitable for operations that run easily at low pets.

3. The rotor inside Servo Motors is an endless attraction. The U/ V/ W three-phase electricity controlled by the motorist forms an electromagnetic field. The rotor rotates under the action of this glamorous field. At the same time, the encoder of the motor feeds back the signal to the motorist. Compared with the target value, acclimate the angle of gyration of the rotor. The delicacy of Servo Motors depends on the delicacy( number of lines) of the encoder. The difference in function between AC Servo Motors and brushless DC Servo Motors AC servo is better because it's sine surge control and the necklace ripple is small. A DC servo is a trapezoidal surge. But DC servo is fairly simple and cheap.

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