BOSTON motor Germany BOSTON model BOSTON price

BOSTON motors are a new generation of gear reduction motors, featuring compact size, low noise, maintenance-free operation, and an attractive appearance. The speed ranges from 0.83r/min to 300r/min. This series of low-speed motors is a new high-tech product that integrates electromagnetic drive and reduction mechanisms within the motor housing. The low speed and high torque directly meet customer requirements without the need for additional reduction devices. The motor uses Class B insulation, Class F insulation, with protection ratings of IP44 and IP55, and voltages of 220V and 380V.

BOSTON motor applications

Motor applications are very extensive, such as in automobiles, tools, industrial control, automation, and aerospace. In general, brushless DC motors can be divided into three main categories of use: Continuous load applications: Primarily fields requiring a certain speed but not high speed precision, such as fans, water pumps, blowers, etc. These applications have lower costs and mostly use open-loop control. Variable load applications: Primarily applications where speed needs to vary within a certain range, with higher demands on motor speed characteristics and dynamic response time. Examples include spin dryers and compressors in household appliances, and oil pump control, electronic controllers, and engine control in the automotive industry. The system costs for these applications are relatively higher. Positioning applications: Most industrial control and automatic control applications fall into this category. These applications often involve energy transmission, so there are special requirements for dynamic speed response and torque, as well as higher requirements for controllers. Photoelectric and some synchronous equipment may be used for speed measurement. Process control, mechanical control, and transport control often belong to this type of application. Practical new types of brushless motors are closely linked to developments in electronic technology, microelectronics, digital technology, automatic control technology, and materials science. They are not limited to AC/DC fields but also involve energy conversion and signal sensing in electric drive and power generation. There are many varieties of new brushless motors in the motor field, but due to price constraints, the application of high-performance brushless motors is not yet very widespread. The following explores and studies the main new types of brushless motors.

BOSTON motor speed control

Motor speed control: A hydraulic coupling is a hydraulic transmission device, generally consisting of a pump impeller and a turbine, collectively known as working wheels, housed in a sealed casing. The casing is filled with a certain amount of working fluid. When the pump impeller rotates driven by the prime mover, the fluid inside is pushed by the blades to rotate. Under the action of centrifugal force, it enters the turbine along the outer ring of the pump impeller, exerting thrust on the turbine blades in the same direction of rotation, thereby driving the production machinery. The power transmission capacity of the hydraulic coupling is consistent with the relative amount of fluid filling in the casing. During operation, changing the fill rate changes the turbine speed of the coupling, achieving stepless speed regulation. Its characteristics are: 1, wide power adaptation range, meeting the needs of different powers from tens of kilowatts to thousands of kilowatts; 2, simple structure, reliable operation, convenient use and maintenance, and low cost; 3, small size, large capacity; 4, convenient control and adjustment, easy to achieve automatic control. 5, this method is suitable for speed control of fans and water pumps. Variable frequency speed control range: 5-100 Hz stepless speed control. Below 50 Hz (60 Hz) is constant torque speed control; above 50 Hz (60 Hz) is constant power speed control. *The voltage boost of the variable frequency device ensures that the motor outputs rated torque at 5 Hz without burning out due to overheating. *Smooth torque at low speeds, no crawling phenomenon. *The motor can withstand 160% overload of rated torque for 1 minutes. Equipped with a gear transmission motor (friction wheel) with variable transmission ratio.

BOSTON motor working principle

The motor is a rotating motor powered by a single-phase AC power supply, with a single-phase stator winding. When connected to single-phase AC power, it generates an alternating pulsating magnetic field in the air gap between the stator and rotor, so a single-phase asynchronous motor cannot self-start. In AC motors, when AC current passes through the stator winding, it establishes armature magnetomotive force, which has a significant impact on motor energy conversion and operating performance. Therefore, passing single-phase AC through a single-phase AC winding produces a pulsating magnetomotive force. This magnetomotive force can be decomposed into two rotating magnetomotive forces with equal amplitude and opposite speeds, thereby establishing forward and reverse rotating magnetic fields in the air gap. These two rotating magnetic fields cut the rotor conductors, inducing electromotive force and induced current in the rotor conductors respectively. This current interacts with the magnetic field to produce positive and negative electromagnetic torques. The forward electromagnetic torque attempts to rotate the rotor forward; the reverse electromagnetic torque attempts to rotate the rotor backward. The superposition of these two torques is the resultant torque that drives the motor. Whether it is the forward or reverse rotating magnetic field, their magnitude relationship with the slip ratio is the same as that of a three-phase asynchronous motor. If the motor speed is n, then for the forward rotating magnetic field, the slip ratio is: s+=(n1-n)/n1=s. For the reverse rotating magnetic field, the slip ratio is: s-=(-n1-n)/-n1=s. From the T-s curve of the single-phase asynchronous motor, the main characteristics are: (1) n=0, s=1, T=T++ T- =0, indicating that the single-phase asynchronous motor has no starting torque. Without other measures, the motor cannot start. (2) When s≠1, T≠0, T has no fixed direction; it depends on the sign of s. (3) Due to the existence of reverse torque, the resultant torque decreases, so the overload capacity of single-phase asynchronous motors is lower. Working principle of capacitor phase-split starting: At startup, switch K closes, causing the phase difference between the two winding currents I1 and I2 to be approximately 90°, thereby generating a rotating magnetic field and starting the motor. After normal rotation, the centrifugal switch opens, cutting off the starting winding. Working principle of shaded-pole single-phase motor: After current is passed through the stator, part of the magnetic flux passes through the short-circuit ring, inducing current in it. The current in the short-circuit ring hinders the change of magnetic flux, causing a phase difference between the magnetic flux in the part with the short-circuit ring and the part without it, thereby forming a rotating magnetic field that makes the rotor turn. In the T-s curve of the single-phase asynchronous motor, the motor rotation direction is clockwise. This is because the magnetic flux in the part without the short-circuit ring leads the magnetic flux in the part with the short-circuit ring.

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