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bldc motor controller and its classification and criteria

Posted by on December 30, 2021 Comments Off on bldc motor controller and its classification and criteria

bldc motor controller and its classification and criteria:

bldc motor controller is mainly linear motor, it is a direct conversion of electrical energy to mechanical energy into linear motion, without any intermediate conversion mechanism of transmission.

bldc motor controller structure can be made as needed Flat, cylindrical or disk-based and other types, it can use AC power, DC power supply or other pulsed power supply to work. bldc motor controller can be in a few seconds to a few thousand kilograms of helicopter pulled several hundred kilometers per hour, it operate in a vacuum, its highest speed up to several thousand kilometers. In the military, people use it made of a variety of guns, and tried it for missiles, rockets; in the transport industry, people use bldc motor controller is made up of more than 500km per hour maglev train; in the industrial area, bldc motor controller is used in the production line for delivery, and a variety of horizontal or vertical movement of a number of mechanical devices. bldc motor controller and have a high-speed, high-thrust features, it also has a low speed, the other fine features, for example, stepping linear motors, it can be done step for the 1μn accuracy, therefore, bldc motor controller has been applied to Many sophisticated equipment, such as the computer’s head drive, camera shutter, automatic plotter, medical equipment, aerospace equipment, a variety of automation equipment, etc. In addition, bldc motor controller is also used for a variety of civilian installations, such as doors, windows, tables, chairs moving, door locks, electric curtains opening and closing, and so on.

S mine fan bldc motor three frequency high-voltage electric tricycle china application

Posted by on December 30, 2021 Comments Off on S mine fan bldc motor three frequency high-voltage electric tricycle china application

S mine fan bldc motor three frequency high-voltage electric tricycle china application
 
Author: Xu Yingsheng Wang Jihao Sunyan Bo Gu Wei
 
 
Abstract: A crystal by controlling the frequency control to achieve a level, no level adjustment in the electric tricycle china installation and large-scale mine owners bldc motor in the application.
Keywords: three-conversion,electric tricycle china installation

Specificity due to the production of coal, the mine ventilation system related to mine safety in production, so the ventilation system in the coal production has a pivotal position. As long supply line, starting pressure drop, maximum protection devices for safe and reliable start-up and standby bldc motor starter switch, the top priority is to enhance the system reliability. Yangquan Coal Mine in NZ in November 2006, new investment and operation of the main fan bldc motor for the GAF-type axial bldc motor (check the bldc motor by the largest coal mine in Asia through bldc motor controller). The main fan motor 10KV 5000KW bldc motor asynchronous motor. In order to better address the project encountered in starting the impact on the grid, and the problem of load impact, the system used by the Liaoning Rongxin Power Electronic Co., Ltd production of three self-developed high-voltage electric tricycle china frequency equipment.

1, electric tricycle china several Starting device

Divided by the motor starter schematic: 1, reduced voltage starting methods. Traditional vacuum motor starting methods are Y-Δ start, decompression starting autotransformer, reactor start-up and so on. These methods belong to a class start decompression start, there are obvious shortcomings, the process of starting a secondary impact of current. The current high-pressure common way for liquid resistance starter starter, SCR series decompression start. 2, variable frequency start method. With the development of IGBT technology, high frequency voltage levels and larger capacities, but because of the price factor has restricted its development.

Rongxin Power Electronic Co., Ltd., on the basis of the SVC successfully developed three high frequency electric tricycle china, it has three characteristic frequency stepless regulator.

2, three frequency high-voltage electric tricycle china technical principles and characteristics

High-voltage soft-start power supply and motor in series between the main circuit shown in Figure 1.
 
Figure 1 Main circuit diagram

Three frequency high-voltage soft-start technology, the first SCR in series, then by controlling the conduction angle of SCR to achieve a level FM, and non-polar voltage regulator functions. Starting early by controlling the valve in the SA, SB, SC was to achieve a turn-on frequency 12.5HZ, the motor of 1 / 4 the rated speed when the control valve SA, SD, SE switch to 25HZ, the motor to achieve 1 / 2 rated speed, through the control valve SA, SB, SC to complete the full range of the switching process, and ultimately reach the rated speed, the bypass is closed off electric tricycle china trigger pulse to complete the starting process. Throughout the starting process in the three frequency points, while adjusting the frequency, change the output voltage to maintain constant voltage to frequency ratio, so that you can ensure that the entire starting process, the starting torque to keep the rated torque of 80 -90%, while the starting current can be controlled at about 2 times the rated current. Starting torque, starting current, is a three-frequency high-voltage electric tricycle china’s largest technical characteristics.

3, S miners fan motor in the practical application.

Yangquan Coal Mine S is a new mine, it’s power capacity is 35KV, 10000KVA, because the grid is responsible for the underground, Inoue electrical equipment supply, so the grid is relatively small margin, in order to ensure the process does not affect the start Other devices running on the main fan starting current requirements are very strict. And because it is located in the high-gas area, which uses negative pressure was high winds axial bldc motor (two-stage fan is currently Asia’s largest mining axial bldc motor), the main fan motor power of 10KV, 5000KW. Throughout the starting process, showing the starting torque, starting current, a smooth start, the advantages of starting a short time. Measured data in Table 1.

hub motor controller working principle

Posted by on December 29, 2021 Comments Off on hub motor controller working principle

hub motor  controller electronic reversing device, instead of the traditional mechanical commutation device (commutator and brush), not only retained the DC motor speed control with good starting characteristics, and AC motor with simple structure and easy maintenance This motor in good, reliable, therefore, the rapid development in recent years. Traditional DC motor armature is rotated, the pole is stationary, but bldc motor driver in this contrast, the magnetic pole is rotated, the armature is stationary, the armature winding current commutation can make use of position sensors and electronic switching circuit to complete. Brushless motor. hub motor driver generally motors, position sensors, and electronic switch consists of three parts. Motor itself consists of multi-phase (three phase, four-phase, five-phase range) armature windings on the stator pole and a certain number of permanent magnet rotor component. AA, BB, CC, said three-phase motor stator windings, NS is a permanent magnet, the motor rotor, PS is the rotor position sensor, and its coaxial rotor and motor rotor is connected, BG1, BG2, BG3 electronic switching circuits power switch, three-phase windings A, B, C respectively, BG1, BG2, BG3 in series to the power supply after. Its operation principle is that a signal controlled by the PS BG1, BG2, BG3 and other switch on on and off, when the switch turns on, the corresponding stator windings, there is current and magnetic field through the magnetic field and permanent magnetic interaction between the rotor pole will generate torque, the motor rotor, the motor coaxial with the rotor position sensor is connected, it also followed the rotation of the rotor and in turn to BG1, BG2, BG3 signal to control the turn on and off, to the armature winding current with the rotor position changes according to the order of commutation, the magnetic armature rotary stepper motor’s rotor to rotate continuously go on.

bldc motor interaction principle

Posted by on June 5, 2020 Comments Off on bldc motor interaction principle

Based on the principle of rotation of the motor for the Fleming left hand rule, when a wire placed in a magnetic field, if the current through the wire, the wire will cut the wires generate the magnetic field lines move. Current into the coil creates a magnetic field using the current magnetic effect, the solenoid magnet at a fixed continuously rotating device that can convert electrical energy into mechanical energy. And a permanent magnet or by another group of the magnetic field generated by the coil to generate power bldc motor interaction principle is the stator does not move, the force generated by interaction of the rotor according to the direction of movement. bldc motor controller is on the alternating current through the stator windings, a rotating magnetic field, rotating magnetic field attracts the rotor rotates bldc motor with the basic structure include “armature”, “field magnet,” “slip ring”, “brush” . Armature: You can rotate around the axis of the soft iron core wound multi-turn coil. Field magnet: the strong magnetic field of permanent magnet or an electromagnet. Collector ring: coil about two to two semi-circular termination of slip ring, with the coil rotation for changing the current direction of the change to the device. Each half-circle rotation (180 degrees), the coil current to change direction once. Brushes: carbon usually made of slip ring brush contact with a fixed location to be connected to power.