Window opener reduction motor manufacturer: Why does the motor need a reducer?
All cars have speed regulators that can adjust speed, so the manufacturers of window lift motor believe that cars have several gears. Gasoline engines (diesel engines) and motors are the same; adding or reducing the throttle will change the speed, but the range of change is not large.
Release time:
2022-03-18 15:33
General understanding of the reducer:
The simplest understanding is that the reducer changes the speed and output torque, providing high torque and low speed. If the reducer's speed ratio = input speed/output speed, and the speed ratio is 100, then the output torque is about 100 times the input torque. (Speed decreases, torque increases) The reducer is also a type of transmission, but a regular transmission that reduces speed is commonly referred to as a reducer. Generally, reducers can adjust according to a fixed transmission ratio, but speed is usually adjusted by levels. Cars all have reducers that can adjust speed, soWindow opener reduction motorManufacturers believe that cars have several gears, and gasoline engines (diesel engines) and electric motors are the same; adding and subtracting throttle will change the speed, but the range of change is not large.
Of course, the clutch and the reducer are not the same thing. However, generally speaking, for reducers, it is easy to think of the contributions of car transmissions and clutches. In fact, each gear change is completed after pulling the gear lever. Generally, adjustable transmissions cannot bear loads during shifting, so the output of the reducer must be separated from the car through the clutch, and after changing gears, they are reconnected. The clutch is just a type of soft shaft (separable).
The law of conservation of energy tells us that the output power of the motor cannot change without reason; it can only turn into heat energy due to various losses. Power remains constant, speed decreases, and force (torque) increases. At the same output power, (angular) speed is inversely proportional to force (torque), and regular reducers also have energy losses, with an efficiency of 70%-99%.
If used in low-speed situations, can only a regular low-speed motor be used? Or is a servo motor needed?
The window opener reduction motor manufacturer believes that relying solely on a low-speed motor is not sufficient. Because: the speed is generally not sufficient. Generally speaking, the number of reducers can be less than 3:1 or greater than 18033601. That is to say, when the general motor speed is 1380 revolutions/minute (four-pole motor), the output speed of the reducer can be increased to over 460 revolutions or decreased to below 7.6 revolutions. Can a regular motor achieve such a large speed range? Even for multi-pole variable speed motors, the fastest two-pole motor is around 2880-2970 revolutions/minute, while the slowest twelve-pole motor is around 480-490 revolutions/minute. If only a few dozen revolutions/minute are needed, a regular motor is even less suitable.
The torque of a regular motor generally needs to work under low-speed loads, usually requiring a relatively large torque (such as for elevators, lifts, production lines, winding machines, etc.). Even if the speed of a regular motor meets the requirements, the torque often does not meet the requirements. It is important to note that at low speeds, the machine guide rails are prone to "crawling" phenomena.
In low-speed situations, can only an AC servo motor be used? Additionally, using an AC servo motor for low-speed operation is not a problem (the servo driver has built-in electronic gears that can be set arbitrarily, but a reduction ratio of 1/50 is recommended). However, the window opener reduction motor manufacturer feels that sometimes the speed meets the requirements, but the torque may not fully meet the requirements. If the torque meets the requirements, it is of course the best solution.
Window opener reduction motorThe manufacturer believes that if the torque does not meet the requirements, it can be divided into the following two smaller configuration schemes:
a) High-power AC servo device (AC servo driver servo motor) scheme
b) Low-power AC servo reducer program.
Window opener reduction motorThe manufacturer believes that in the absence of special requirements for position accuracy, the cost-performance advantage is minimal compared to high-cost and low-power AC servo reducer schemes.
However, if there are higher requirements for position accuracy, the cost of high-power AC servo device programs will be higher, but the position accuracy requirements will be guaranteed. The low-power AC servo device reducer scheme has mechanical gear backlash on the reducer, so some sacrifices in position accuracy need to be made. The final scheme should be determined based on specific equipment, design goals, specifications, accuracy requirements, etc.
The window opener reduction motor manufacturer suggests that the inertia of the motor's torque rotor must be considered.
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