A typical brushed DC motor consists of an outer stator, typically made of either a permanent magnet or electromagnetic windings, and an inner rotor made of iron laminations with coil windings. A segmented commutator and brushes control the sequence in which the rotor windings are energized, to produce continuous rotation.
A typical DC motor consists of an outer, permanent magnet stator and an inner rotor made of iron laminations with windings.
Coreless DC motors do away with the laminated iron core in the rotor. Instead, the rotor windings are wound in a skewed, or honeycomb, fashion to form a self-supporting hollow cylinder or “basket.” Because there is no iron core to support the windings, they are often held together with epoxy. The stator is made of a rare earth magnets, such as Neodymium, AlNiCo (aluminum-nickel-cobalt), or SmCo (samarium-cobalt), and sits inside the coreless rotor.
A coreless DC motor does away with the iron core in the rotor. Instead, the rotor windings are wound in a skewed, or honeycomb fashion to form a self-supporting hollow cylinder. The stator magnet sits inside the coreless rotor
Other terms for coreless DC motors include “air core,” “slotless,” and “ironless.”
The brushes used in coreless DC motors can be made of precious metal or graphite. Precious metal brushes (silver, gold, platinum, or palladium) are paired with precious metal commutators. This design has low contact resistance and is often used in low-current applications. When sintered metal graphite brushes are used, the commutator is made of copper. The copper-graphite combination is more suitable for applications requiring higher power and higher current.
Coreless DC motors have a rotor that is hollow and self-supporting, which reduces mass and inertia.
The construction of coreless DC motors provides several advantages over traditional, iron core DC motors. First, the elimination of iron significantly reduces the mass and inertia of the rotor, so very rapid acceleration and deceleration rates are possible. And no iron also means no iron losses, giving coreless designs significantly higher efficiencies (up to 90 percent) than traditional DC motors. The coreless design also reduces winding inductance, so sparking between the brushes and commutator is reduced, increasing motor life and reducing electromagnetic interference (EMI).
Motor cogging, which is an issue in traditional DC motors due to the magnetic interaction of the permanent magnets and the iron laminations, is also eliminated, since there are no laminations in the ironless design. And in turn, torque ripple is extremely low, which provides very smooth motor rotation with minimal vibration and noise.
Because these motors are often used for highly dynamic movements (high acceleration and deceleration), the coils in the rotor must be able to withstand high torque and dissipate significant heat generated by peak currents. Because there’s no iron core to act as a heat sink, the motor housing often contains ports to facilitate forced air cooling.
Coreless DC motors are available in both cylindrical and flat (disc) configurations.
The compact design of coreless DC motors lends itself to applications that require a high power-to-size ratio, with motor sizes typically in the range of 6 mm to 75 mm (although sizes down to 1 mm are available) and power ratings of generally 250 W or less. Coreless designs are an especially good solution for battery-powered devices because they draw extremely low current at no-load conditions.
Coreless DC motors are used extensively in medical applications, including prosthetics, small pumps (such as insulin pumps), laboratory equipment, and X-ray machines. Their ability to handle fast, dynamic moves also makes them ideal for use in robotic applications.
After the DC current passes through the brush, current flows into the coil through the sliding contact between the brush and the commutator segments. The energized coils of different Rao groups cut the magnetic lines of force in the permanent magnetic field formed by the stator magnets, thereby generating electromagnetic force. The torque generated by this electromagnetic force causes the rotor to rotate, and the current commutation of the brush causes this process to cycle to achieve permanent motion of the rotor. The rotor drives the eccentric rotor of the mass to rotate, and the vibration motor has the effect of vibration. The vibration of the motor is mainly achieved by the eccentric vibrator. With love by www.vibrationmotor.net
Smart wear equipment has a prototype of the last century, but these two years has gradually become a meat and potatoes, to see those big holes and keep the grid of high technology products, smart wear equipment, so imagine not only stay in the brain, but also to life Bring a different color.
1.Bragi Dash sprint wireless smartphone
The choice of headphones is mostly given priority to sound quality, Bragi Dash development brings a dual function, that is, music player and detection of movement data at the same time. It is a wireless smart headset, get rid of wired shackles such as Bluetooth as a random, is running away from the smart hand ring is an effective weapon.
Its main features and innovations are also a highlight of the headset, with digital MEMS microphones with custom mechanical tuning, external auditory canal microphones and passive bilateral noise isolation. Music control communication control and tracking control only need to touch function can be. Exercise can detect heart rate, number of steps, time and upcoming tracking function.
2.Smart Ring MOTA SmartRing
MOTA was founded in 1999, headquartered in Silicon Valley, is a very good for customers to provide a practical product consumer electronics company, which owns 3D printing technology, wear technology.
Smart ring is a new out of a smart device, relative to Google glasses is different, smart ring need to contact with the phone, like a smart watch, both Andrews and Apple system, to receive mobile phone notification message, including text messages, Mail, etc., there are two ways to notice the sound and touch, through the phone to the ring, the shape of midnight black and pearl white, and can be waterproof.
3.Hush intelligent soundproof earplugs
The sound is sensitive to the quality of sleep is not very good people, this is the absolute temptation. But it is not isolated from the sound to the ear is not suitable for the vacuum state, but in the case of noise can also choose to cooperate with the phone to adjust the most suitable for their own voice, but also can connect alarm clock, SMS, phone.
Developers and testers, after hundreds of tests, designed the most perfect style, using memory cotton and silicone fillers and curved radians to match the ears of most people, without too much uncomfortable feeling.
4.LifeBeam heart rate monitor helmet
Smooth contour, 50 grams of weight, equipped with integrated heart rate sensor, optical sensor, three-axis acceleration, full-featured wireless communication module to support up to 15 hours of continuous use, etc., operation can be used Bluetooth and mobile phone communication, all sensors The collected data will be real-time synchronization to the smart phone.
Compared to traditional ECG ECGs, these have been greatly improved and broken, comfort and accuracy are favored by cyclists.
5.Darma smart cushion
The main function is to detect the user's sitting, heart rate, breathing, suggesting that the user is not the correct posture. The built-in pressure sensor of the cushion can be used to calculate the sitting attitude of the user by detecting the pressure on the surface. When the user sitting is not correct, through the mobile phone application in the package to remind.
Sit for a certain time, to remind the user activities and how to relax bones. Drma supports Android and IOS, charging once for one month.
6. Smart bracelet "Wristify"
Wristify can adjust the body temperature, known as the "micro-air-conditioning on the wrist", by sending cold pulse or heat pulse, about 0.4 ℃ per second speed to your body cooling or warming. Wristify first appeared in 2013, is a few MIT student team after winning the prize developed products, modeling like a large and powerful bracelet, in the simple principle of the function also has a stylish appearance The
7.Boogio smart insoles
Boogio smart insoles, by the underwear under the thin sensor boogio and attached to the side of the shoes made of small parts of the Bluetooth, the system is equipped with IOS, Andorid, PC, boogio used to track the movement of the user's feet and efforts to collect the user's movement Data, through the Bluetooth will be collected information transmitted to the smart device or App, the user can be through the data to change the state of motion and the best state to carry out, if it is fitness, running, cycling, etc., Boogio users through This system is given real-time feedback of the specific performance of the movement, with a very intelligent graphics rendering.
At the same time Boogio can also use the left and right feet for PPT presentation, as well as virtual reality game connection point.
8.Blusmart Smart Trunk
Blusmart smart luggage through the location sensor test application connected to the smart phone, through the App can luggage lock, unlock, tracking and positioning, intelligent weighing, comes with large capacity battery pack, you can charge the phone several times. If the luggage box is lost on the road, it can be positioned.
If someone is trying to open your suitcase, your phone will receive an automatic alarm or reminder. On the road it also has a charging function, can charge electronic equipment.
In addition Bluesmart can also be your trip, the number of visits, time, each time spent, the airport visit, the total mileage and display useful real-time driving data can form a quantitative expression, let you see you with How far away the luggage to go.
9.Fitbit Force Fitness Wristbands
Unique, intelligent wear equipment can not be separated from the combination of intelligent products, Force is also a mobile phone device connected to the product, is a fitness tracking wristbands, the main function is to calculate the number of steps, travel distance, according to your personal information And data (mainly age, gender, height and weight) to calculate the calories and calories consumed, but also the use of Fitbit depth analysis tools and product ecosystems to draw a comprehensive user's healthy eating habits.
Fitbit simple operation simple modeling, call notification and alarm function alarm function, to set the alarm time, the wrist will have a slight vibration to remind the user. In the smart watch and smart bracelet popular now, this fitness wristband is still loved by many advocates, according to the majority of users given the response is mainly convenient light, the number of steps to calculate and analyze the heat and calories are particularly popular.
10. Intelligent electronic cigarette Smokio
Cigarettes and cigars for men may be dependent and habits, but always harmful to the body, with the emergence of smart products smart wear equipment Smart cigarette smoke Smokio advent is undoubtedly a kind of protection for health. Smokio connects with electronic devices, built-in Bluetooth chips and processors, synchronizes with the phone via Bluetooth, records the history of smoking, smoking and smoking, as well as time and place.
More importantly, in the smoking process will measure you from the traditional cigarettes from the blood content and heart health improvement.
Electronic cigarettes have been more and more consumers of all ages. It not only allows the health of smokers from harm, but also allows their smoking behavior from location restrictions. But it seems that some people think that the function of these electronic cigarettes should be more powerful. Recently, a more intelligent electronic cigarettes come out, it is Smokio. It is reported that this electronic cigarette using Bluetooth 4.0 (BLE) to connect the phone. Users in the use of only need to download a corresponding software, and then be able to track the indicators of their smoking, and thus better understand their own smoking habits. Bluetooth 4.0 smart electronic cigarette program Bluetooth 4.0 (BLE) electronic cigarette compared with the traditional electronic cigarette, it is based on the internal BLE module with the mobile terminal APP with the Bluetooth 4.0 electronic cigarette by improving the third generation of electronic cigarette can achieve the new features are: 1, smoking history memory function. Set the electronic cigarette time and mobile phone time synchronization, always record every time the smoking time, reflecting the personal smoking habits; 2, smoke volume control function. According to personal smoking preferences, random set the amount of electronic smoke smoke; 3, healthy smoking / smoking cessation program function. Set a week's smoking plan and set the number of cigarettes every day (once more than the planned ceiling, the cigarette will not be able to smoke success), and then help smokers who want to quit, by gradually reducing the number of daily smoking, Getting rid of smoking and getting quit; 4, electronic cigarette power display and management functions. Through the mobile phone APP query electronic cigarette power, and set the reminder value, once the lack of electricity will remind the charge, and by obtaining the number of battery charging, estimated the remaining life of electronic cigarette; 5, secret security function. Set the connection password and query password to protect personal privacy; 6, cloud health management functions. Upload personal smoking records to the cloud server for health management advice; Bluetooth 4.0 smart electronic cigarette program In this way, the smart phone turned into a smoker steward, whether smoking or quit smoking has become a record, can be planned fun trip. For enterprises, we can gradually accumulate a large user base of data, and by obtaining information on smokers feedback, further analysis of customer psychology, to help improve the product, to provide more quality services, but also with other health service platform , To create a perfect full-featured health service platform.
A vibration dog collar can also be a good choice for an abused dog, again because of the milder sensations. Many people also use these collars as part of a training program designed for a blind dog or a deaf dog.
– Stubborn or Active Dogs
However, even though these collars are frequently used for sensitive pets, it’s also possible to use them on more active or stubborn dogs. Because the collars provide a range of different vibrations, it’s likely that a dog will respond favorably to one or more of the sensations. However, for very active or stubborn dogs, some vibration collars also include an electric impulse feature. If necessary, the electric impulse feature can be used as a back-up if the dog doesn’t respond to the vibration signals.
– Using the Various Vibration Levels
When using a vibration dog collar, it’s important to make good use of the various vibration levels. In many cases, these collars will have a wide range of vibration levels, which are easily controllable using the buttons on the remote control unit. For example, one button might provide multiple levels of tickle-pressure vibration. But the controller is also likely to have a stimulation level available as well, which can be used as a back-up to replace the constraining sensation of a traditional leash. In some cases, the remote unit might also have a second button available, providing a wider array of vibration sensations as well as an optional electric impulse sensation.
Using a collar that provides a vibration “pager” button is also a good option for those who prefer using vibration instead of electronic stimulation. In the case of some of these collars, the electronic stimulation is controlled by a rheostat dial, and can be turned down so low that the dog will barely feel a tingle. This kind of collar system can be quite useful, since the vibration “pager” mode can be utilized for most training needs, but the electronic stimulation is still available if needed. Since some rheostat dial controlled collars have 100 or more stimulation levels, it’s possible to use a variety of the lower levels if needed, even on sensitive dogs.
– Uses for Vibration-Only Collars
Vibration dog collars can be used as part of a dog’s training program in much the same way as other electronic collars. When using one of these collars, a quick alert vibration is first given. When the dog feels this vibration, he or she knows to begin a particular response. If necessary, a second vibration can be used if the desired behavior is not performed.
These collars are often used as part of a leash-free training program. During the training process, the dog will quickly learn what the various vibration sensations mean, and will soon dependably respond with the correct response or behavior. Because of the various array of different vibration sensations, the owner is provided with a wide variety of options. As part of the dog’s training program, different vibration sensations can be used to elicit different behaviors from the dog. Although the various sensations are easily distinguishable as unique by your dog, all of them are gentle, humane and designed not to produce stress or fearfulness in a dog.
Depending on the desired result, vibration training collars can be used to provide a dog with positive or negative feedback. One collar can even be used to provide both positive encouragement of desired behavior as well as a deterrent to undesired behavior, thanks to the wide array of vibration sensations that are available.
These collars can be especially useful when training a deaf or blind dog, replacing the verbal or visual command signals that he or she would not be able to interpret. They are also a great way to provide a dog with training consistency, since the signals will be the same, regardless of which owner is operating the control. This can be a big help for dogs who seem to take verbal commands from one person, but not from another.
It is lucky that our vibration motor can be used for those E-collar.You can use coin type or 6mm series.
Toy motor is the main power source to keep the power of toys. Designers have little opportunity to design a toy motor in toy production. There are many techniques and methods for the selection of toy motors. Find the appropriate speed ratio and torque The standard of the toy motor factory is the no-load speed, and the speed ratio is calculated, it is generally used to calculate no-load speed. The speed ratio of the walking toy is between 80~150, because the toy product is not a kind of precise machine, so it can be adjusted to the actual transmission ratio. For example: gear transmission in a section of the tooth number ratio of 20:8, the experiment found that the speed is too slow you can try 22:6, if the speed is too fast, but also for 18:10, this approach is very convenient. Toy motor products have a maximum load data, there is a load and the speed of the relationship. Because the toy products are generally not very large and battery driven, so the load of the toy motor is not very large. In general, the greater the load and torque, the larger the size of the toy motor, the battery to be more, and the heavier the weight of the toy, so as far as possible to choose the appropriate toy motor. Generally, the load and speed of the motor in the curve of the region will rise. If you want to save costs, in the case of a high-power motor can be found in the case of a small power to try. Through repeated tests, a toy motor with small power and can meet the requirements is found. Radio interference test The working principle of the toy motor is to continuously change the current in the coil by the brush, thus ensuring the continuous rotation. It can be imagined that the larger the magnet in the motor, the longer the coil, the greater the torque will be, and the change of the current will form an electromagnetic wave. The existence of electromagnetic waves will interfere with a variety of household appliances. If a child is waiting for a plane to play with the motor of the toy, it may affect the aircraft landing. So in the actual work will add an anti interference washer (such as DV WASHER, about 0.5 Hong Kong dollars), but the general design will be in the two electrode motor on a parallel capacitor or a ceramic resistor (stable circuit function), a reduction of the brush and the influence of rotor coil current for the stability on the other hand. In practical work, it is possible to use a small radio to do interference test equipment. The toy is generally the rotating shaft of the motor shaft and the iron, iron shaft directly with a tight 6 teeth or 8 teeth of 0.5 modulus gear (or a small pulley or lever, when the gear is pan) or pot rod, especially pan rod, because just starting moment, between tooth and tooth will a card, then the current coil will increase, iron axial vibration and the move will interpret the cards, so don't put in a fixed motor shaft in the axial direction on the fixed die (less to 0.5mm allowance). Placement should pay attention to reduce noise Is the resistance of the coil, the current through the resistor will heat, so the motor shell cannot be directly exposed to the best at the same time, the motor can not be placed in the small box closed, closed space will lead to not easy to distribute the heat sealed, and a small box will become a big motor noise sound put. Motor products are the biggest problem is the noise, although this noise may not have security problems, but it does not sound comfortable. The biggest problem is the noise of high speed gear, the general tooth and the middle of the gap between the teeth will be between 10 to 20 wire (for the gear of the 0.5 model). The gap is too small, the high speed gear will impact noisier; too much, lack of power on one hand, on the other hand, there will be noise, so sometimes use a pulley or a soft driving gear (such as wheel PE) to reduce the noise, of course, you can also add a little oil motor (nontoxic horse as oil). However, we should also pay attention to the motor with the best parts of the teeth do not work with the pieces, especially the larger with a relatively closed space of the pieces of a piece of work, that is, in a large piece of paper directly on the production of dental splint, such as battery boxes, car chassis, etc.. These relatively confined space will play a role in the amplifier, several times to enlarge the noise. The author has experienced a lot of this design, such as the direct motor fixed at the bottom or side of the battery box, the noise will be very terrible. In one instance, a company developed a 1.5 foot remote control car (the Beatles appearance), was at the bottom of the vehicle directly make tooth box, which is directly fixed on the motor vehicle, because it saves a mold of money, while reducing the assembly time, but direct transmission to the vehicle noise and vibration caused by vehicle resonance the noise is very large. Finally, we have to re do a set of mold, the teeth out of the box, and in the case and the bottom of the car to install the seat pad to absorb vibration to solve the problem. It can be seen that when the noise of the toy is very large, it can be used to reduce the noise and reduce the noise by adding sponge or other soft materials (such as rubber sheets, etc.). Method for fixing and realizing positive inversion The two ends of the motor are designed with a fixed position to prevent rotation. As long as the size of the reference motor diagram, with the upper and lower clamping two pieces can be. Generally not fixed motor shell body, because on the one hand the heat is not good, but on the other hand, it is difficult to achieve stable fixation, unless the structure of tens of thousands have not, can also play motor screws (special screw holes on the motor) Positive inversion toy motor can be used to change the direction of the battery and the pros and cons of two kinds of steering (by mechanical switch to change, also can through the electronic control), which means that a motor can get two different action. Such as: the motor is transferred to the simulation animal walk forward, while the motor is reversed, making it stop and wagging its tail, shaking, the achievement of these movements is passed through a gear rotating process, the driving wheel has a tangential force to achieve the conversion principle, namely through the positive direction of rotation of the motor driven by a set of gears, and in reverse when another group of gear drives. Can be tangential to the axis of jumping called axis. With love www.vibrationmotor.net