Category: bldc motor

bldc motor: the advantage of it

bldc motor can overcome the shortcomings of these well-known stepper motors. They are very efficient through optimized motor control, and because of stepless motion, their control is smoother and quieter, thus consuming less electricity and generating less heat.
On the other hand, when using bldc motor, the overall system cost will be higher. This is partly due to the need to control bldc motor in a single-chip computer to run more complex algorithms.
In addition, from stepper motor to bldc motor, besides developing control software, it is necessary to redesign the mechanical subsystem. These requirements can significantly increase project costs and time to market.
Finally, when the design is completed, the team must spend time collecting long-term reliability data. A better solution is that if the stepper motor drive can rotate as efficiently as a bldc motor, and the noise is low, there is no need for a large number of redesigned or expensive control elements.
In this way, designers can launch the next generation of devices that are quieter, more environmentally friendly, without cooling fans, and more reliable.
By improving the stepper motor controller in two key areas – adjusting the motor drive current and stepper pulse generation method – the existing mechanism can provide the required bldc-like performance.
To solve this problem, ON Semiconductor developed LC898240 current controller, which provides a method to automatically optimize the driver’s constant current settings when the motor load changes. This allows stepper motors to drive efficiently, similar to bldc motor, and minimizes audible noise and wasted energy.

bldc motor: the best advanced precision motor for robotics

bldc motor design gives a new motor series, which is small enough to be suitable for limited space, strong enough to do real work, efficient enough to be used in wireless or remote applications.
High performance bldc motors can provide the output level and economy required for today’s high-demand applications. In terms of industrial systems, this means that you can install enough functionality on the arm to allow it to perform real work while operating efficiently, serving reliably, generating little waste heat or electrical noise.
When it comes to industrial applications, motors in robotic processing and assembly systems must be very reliable, cost-effective and space-efficient.
For example, the ability to incorporate the motor itself into the manipulator rather than attach it to an external point of motion means that more robots can be placed in a given space.
The design of a frameless bldc motor, also known as the rotor/stator assembly, allows the motor to be fully integrated into one assembly to produce the largest possible torque-volume ratio.
There are some useful examples of industrial roving systems at both ends of the scale, because not all roving is as big as a golf cart.For example, inspection-class ROVs for checking out remote or inaccessible areas must be small and portable so that they can be easily moved to where they are needed and deployed.
The latest generation of advanced bldc motor not only meets the requirements of ROV detection level, but also has small size, high power, high efficiency, compact design and low noise. Customizable bldc motor serves this particular market segment with packaging and frameless mechanical configuration.

bldc motor: applied to several new products

bldc motor is widely used in industrial automation applications. Maxon motor will launch new bldc motors at SPS IPC Drives.
A new engine has appeared on maxon’s production line: the eci – 52xl high torque ratio standard version offers an impressive 50% torque increase, making bldc motor the perfect choice for industrial automation applications.
The eci-30 integrated electronics technology is ideal for applications where efficiency and reliability are critical, such as pumps and fan drives. The commissioning process of this motor is very simple, I hope to avoid motion control, but I hope to enjoy the advantages of brushless motor.
Enx16 EASY XT is another brand new product in our portfolio. The XT version of the simple encoder family is designed for extreme conditions and withstand temperatures from -55 to 125°C.
Roboy also appeared on the maxon booth. Humanoid robots driven by maxon motors are modeled on human anatomy.It is based on tendon’s drive technology that enables Roboy to move like a human and react to the environment.
ECX Speed 6 is a new member of the ECX series. The 6 mm diameter bldc motor is primarily designed for the medical industry. The bldc motor iron-free winding allows speeds of up to 100,000 rpm.

bldc motor: how to maximize the effectiveness of its commutation

bldc motor needs external controllers to control commutation activities.The following article will examine many ways to achieve this.
Simply put, commutation is the process of switching currents between the phases of the motor to generate motion.For brush motors, physical brushes are used for this purpose (twice rotating each time).However, bldc motor does not have such a mechanism, so an alternative mechanism is needed.The structure of bldc motor means that they can (at least theoretically) have any number of pole pairs for commutation.
Although bldc motor and wire drawing motor have the same basic working principle, the additional external control circuit must be taken into account. To some extent, the more complex control and feedback circuits associated with BLDC impede their application in some applications.
However, stricter international environmental standards are now leading to greater proliferation.
In recent years, engineering innovations related to motor drive technology and better permanent magnets have further supported the transition to bldc motors. With more and more opportunities facing bldc motors, more and more engineers have to consider how to apply this technology to their system design. Because the rotor of BLDC motor is affected by the rotating stator pole, it is necessary to know the position of the stator pole at any given time.This is the function of the bldc motor controller.

bldc motor: how does it work in a ceiling fan

bldc motor is used in ceiling fans. A month after Panasonic launched a 7-watt emergency LED lamp, Anchor launched a series of smart fans using a new bldc motor to minimize power consumption in Indian homes and business offices.
The new bldc motor fan adopts the first-class technology of Japan and is produced in the most advanced factory in India.
The ceiling fan is assembled by bldc motor. This helps the fan to work without slippage loss and reduces power consumption by 60%. Therefore, it can maintain a constant speed (RPM) of up to 140 V even in the case of voltage fluctuation.
The new BLDC fans are certified by the U.S. Energy Efficiency Agency (EEA) as 5-star, so they consume less power without affecting air transmission.
The new anchor fan consumes only 30W of power and can provide 230 cubic millimeters (cubic meters) of air transport even at the highest speed.
The fan has a convenient remote control operation and a special sleep mode. It can switch to automatic shutdown function of 2 hours, 4 hours or 8 hours.
This series of indoor air quality fans are temperature sensitive and help to provide cool air and create a natural, comfortable and relaxed environment.
The new generation of bldc motor ceiling fan not only saves power, but also provides a variety of colors – White / silver, marble / gold and walnut / gold.

bldc motor: why is it widely used

bldc motor has many advantages over other types of DC motors. They are high-speed operation, compact power level, almost no electromagnetic interference. However, the complexity and cost of driving circuits limit their applications.
The good news is that recently the development of semiconductor drive circuits has made bldc motors more popular. In fact, these new drive circuits may affect you, making bldc motor your first choice for new electric household appliances and industrial products.
bldc motor is different from ordinary DC motor, and has strong permanent magnet rotor and fixed stator winding. Windings are usually connected in three-phase structure, requiring three different driving signals to three sets of windings. The driving signal is applied by the controller to create a rotating magnetic field, which interacts with the magnetic poles on the rotor to produce a smooth and continuous rotation.
Bldc motors are sometimes referred to as electronic commutating motors. Although they are designated as DC motors, driving signals are a form of communication. At any time, one pulse is positive, one pulse is negative, and the third pulse is open (O) or floating. This series of pulses makes the rotor stable.
The general advantages of bldc motor include: standard DC motor does not use mechanical commutator and brush. Brush wear and shorten service life. In addition, the brush commutator switch combination produces arcs, which in turn can cause electrical noise. Bldc motor eliminates these problems. It is more reliable, efficient, and produces less electromagnetic interference, and bldc motor provides more torque and power than other DC motors.

bldc motor: how to convert it to encoder

bldc motor can be converted into a rotary encoder if you have some magnets and a bunch of coils arranged in a circle. Many people use bldc motors as rotary encoders, but they seem to use motors as generators and observe the phases and voltages. In their Hackaday Prize project, they took a different approach: they used bldc motor as coupling inductor, which seemed to be a viable way to convert motors into encoders.
At present, the project aims to send instructions to the microcontroller through serial port and rotate the bldc motor to a specific location. Future work will turn these bldc motors into tactile feedback controllers.
The experimental device of this project is a blue pill microcontroller based on STM32F103. This, combined with a set of half-bridges for driving bldc motor, is really the only thing that requires rotating motors and detecting where the motors are. The circuit uses 6 digital outputs to drive the high side and low side of the half bridge, and 3 analog inputs are used as feedback. The resulting waveforms look like three strange staircases, out of sync with each other, and the correct processing is enough to detect the position of the bldc motor.

bldc motor: what is trapezoidal control of it

bldc motor is controlled by a variety of different control algorithms. Usually, the voltage of an electric motor is controlled by a power transistor as a linear voltage regulator. This is not realistic when driving high power motors. High power motors must be controlled by PWM, and the microcontroller needs to start and control functions.
Control algorithms must provide three things:
PWM voltage controlled motor speed
Mechanism of commutating motor
Methods using backward EMF or Holzer sensor to estimate rotor position.
Pulse width modulation is used to apply variable voltage to motor windings. The effective voltage is proportional to the duty cycle of PWM. When the commutation is suitable, the torque speed characteristic of bldc motor is the same as that of DC motor. Variable voltage can be used to control motor speed and available torque.
Trapezoidal commutation of bldc motor
One of the simplest control methods of DC brushless motors is the so-called trapezoidal commutation.
In this scheme, the current is controlled one-to-one at a time through the motor terminal, and the third motor terminal is always disconnected from the power supply.
The commutation of the power transistor provides energy for the appropriate windings in the stator to provide the optimal torque generation according to the rotor position. In bldc motor, the single chip microcomputer must know the rotor position and commutate at the appropriate time.

bldc motor: more efficient than brushed dc motor

bldc motor needs more complex control design and drive circuit. In place of the bldc motor single door driver and power field effect transistor, each phase of the bldc motor needs to take out 6 memory, each memory is composed of three half bridge pairs.

The designers of power tools are constantly taking on the task of cramming more electronics into the same or smaller space. The first is to switch off the wires by switching to battery powered equipment. Due to the need to save battery power, there are more complex control schemes, sensors and power drive devices, from brush DC motor to a more efficient bldc motor.

Wireless and BLDC blocks require very different feature sets. Control bldc motor calls high resolution pulse width modulation (PWM) timer, multi-channel analog-to-digital converter (ADC) with necessary conversion speed, general input/output (GPIOs) interrupt capability, and wired connection options. Wireless MCU needs to have RF front-end, high-frequency reference clock, digital phase-locked loop (PLL) and DSP modem and other functions.

Dividing wireless and BLDC functions into separate MCUs is a tested option, but it’s better to combine the two blocks into a single MCU. It creates a more compact solution while reducing power consumption and BOM costs. Of course, the selected microchip must contain the required peripheral blocks, processing power, and memory required to perform bldc motor and wireless functions.

bldc motor: how does it come out?

bldc motor is produced in accordance with the times. For the electronics design industry, this is an exciting time as embedded electronic functions have penetrated into every aspect of modern society. With the subversive growth of the Internet of Things (IoT) and new intelligent manufacturing (also known as Industry 4.0) requires designers to develop powerful, compact, accurate and efficient motion-driven solutions.
It’s been more than a century since electric motors existed, but the initial design was inefficient, bulky and inaccurate. The emergence of rare earth magnets and the design of advanced bldc motor have given rise to a new series of motors that are small enough to be installed in confined spaces, powerful enough to do practical work. What’s more, bldc motor is efficient enough to be used in wireless applications or remote applications.
With the pressure of creating products that are both functional and cost-effective, electronics engineers must get the best performance from every system they design.
High-performance bldc motors deliver the performance and economics required in today’s demanding applications. This includes applications ranging from smart home appliances to automated propulsion of IoT equipment, from industrial workshops to “downhole” drilling and mining operations, bldc motor is widely used in different industries.

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