BLDC motor is a rotary machine, BLDC motor controller ,It will transform electrical energy into mechanical energy, which includes a solenoid winding to generate magnetic fields, or distribution of the stator windings and a rotating armature or rotor, a current through the wire and leaving the rotation by the magnetic field, these machines Some types can be used for BLDC motor can also be used for generators. It is the electrical energy into mechanical energy of a machine. The BLDC motor is usually part of a rotary motion for power, this BLDC motor as the rotor BLDC motor; there in a straight line, called linear BLDC motor. BLDC motor can provide power range widely, from milliwatts to a million kilowatts. BLDC motor is very easy to use and control, self-starting, acceleration, braking, reversing, valves and shelter capacity, to meet various operational requirements; BLDC motor’s high efficiency, no smoke, odor, do not pollute the environment , the noise is also smaller. Because it’s a series of advantages, so in industrial and agricultural production, transportation, defense, commercial and household appliances, medical electrical equipment and other aspects of wider applicat
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AC induction BLDC motor
Today’s domestic industrial control industry, for motors usually have such a view: low-end motor using AC induction BLDC motor, high-end motor servo motor. In fact there is a domestic motor applications skip the phenomenon, from the AC induction motor to jump directly to the BLDC motor controller, and the middle of the brushless DC motor is often ignored by people. Brushless DC motor as a DC brush motor characteristics, but also the frequency of the device, they are called the DC inverter, the international generic term for the BLDC. Unique brushless DC motor of high efficiency, low fever and other features and advantages, are in line with the national energy saving requirements. By comparison with some other motor, we can see these features more intuitive, and thus facilitate the selection of the motor when engineers select the most suitable motor, not the most expensive motor.
electric motor systems -hub motor
Motor is to convert electrical energy into mechanical energy of the equipment, it is the use of power by the force coil in a magnetic field the phenomenon of rotation is made, distributed to each user at the motor power by using divided into bldc motor and the hub motor, electric motor systems most of the hub motor, can be synchronous or asynchronous motor motor (stator magnetic field speed and rotor speed is not in sync speed). Mainly by the motor stator and rotor components. Power wire in the magnetic field direction of movement by force and magnetic sense of direction with the current line (the magnetic field direction) direction of the. Motor works by magnetic force on the current role of the motor rotation.
Brushless DC motor is also called BLDC motor
No commutator motor (roasted Yuushidendouki choking, Brushless Direct Current Motor) is a DC motor with the same structure as the permanent magnet synchronous motor drive built-in power supply control circuit instead of the commutator . Brushless DC motor, brushless DC motors, also called BLDC motor. Brush DC motor with high efficiency, have been widely used because it is relatively inexpensive, can be miniaturized, have life by the brush wear due to the sliding contact. Therefore, the larger motors are required to maintain replacement brush, small brush if you can not be replaced, and the life of the motor brush life. No commutator motor is replaced by the role of electronic brush (brushless DC motor) is.
BLDC motor controller Advantages
there is no commutator brushes, no need to maintain its long life.
There is no electrical brush noise.
There is no external contamination of the powder brush wear.
High-speed operation is possible because there is no contact parts.
Cons
for electronic circuitry, Environmental resistance and ambient temperature will depend on electronic components.
Expensive compared to brushed DC motor. If the current is high, especially for switching semiconductor devices are expensive
GB18613 standard value of BLDC motor efficiency
Mitsubishi, GB18613 standard value of BLDC motor efficiency class certification in China-2006 GB2
In the first three-phase BLDC motor manufacturer acquired the domestic generic
High-efficiency regulations in China (GB18613-2006) Notice of class certification GB2
Mitsubishi Electric Corporation, High Performance Energy-saving BLDC motors, “Super Line Eco Series form SF-HR” in, GB18613 the BLDC motor efficiency standards regulated by implementing regulations that are labeled with the China-grade energy efficiency 2006 GB2 (IEC60034-Efficiency Class 30: equivalent IE2) Since the announcement on June 30, we obtain the certification. In a generic three-phase BLDC motor, the first certified as a domestic manufacturer (※ 1) and.
Currently, the background of the global warming movement and the impact of high international resources, there is a growing awareness of energy use is a source of inhibition of CO2. In particular, the application equipment BLDC motors consume about 40% of the total electricity the world has been focused, three-phase induction BLDC motor low voltage, especially since the large effect of improving the efficiency of a single, high three-phase induction BLDC motor in the world or are planned effectively initiate the legislation.
In China, the implementing regulations have been enforced in China energy-efficiency labeling, GB18613 efficiency reference values for BLDC motor built into the equipment manufactured and sold in China alone – July 01, 2011 Class 2006 GB2 was prescribed. Accordingly, for the BLDC motor to be exported to China, including a BLDC motor built into the equipment, certification of the law were required to display a certification label.
Our high-performance energy-saving BLDC motors You’re incorporating more product domestic exports to China set manufacturers’ Super Line Eco Series form SF-HR “to add a class that conforms to the specifications prescribed efficiency standards for the law GB2 The result of the certification application of the law, we certified on June 30.
Future for China, as well as develop products that meet high-efficiency BLDC motors or regulations in Japan and overseas, aiming to sell.
How to Select bldc motor and stepper motor
How to Select bldc motor and stepper motor?
Mainly depending on the specific application of the case may be, simply to determine: the nature of the load (such as horizontal or vertical load, etc.), torque, inertia, speed, accuracy, acceleration and deceleration, etc., the upper control requirements (such as port interface and communication requirements), is the main control position, torque or speed mode. Power supply is DC or AC power or battery power supply, voltage range. Accordingly, to determine the motor and equipped with the drive or controller models.
Choose the stepper motor or bldc motor controller?
In fact, the choice of what kind of motor should be based on the specific application, depending on their own characteristics. Please see table below, naturally understand.
Stepper motor system bldc motor system
Small and medium-range torque torque (20Nm usually less) small medium large, full range
Low speed range (usually in the following 2000RPM, high torque motor is less than 1000RPM) high (up to 5000RPM), DC bldc motor can even reach 1 to 2 million r / min
Main control position control diverse intelligent control, position / speed / torque mode
Vibration at low speed smoothness (but with a sub-type of drive can be improved) is good, runs smooth
Accuracy is generally low, higher high when the sub-type drive (depends on the specific feedback device resolution)
Torque-frequency characteristics of high speed, good torque down fast torque characteristics, features hard
Overload overload feature will be out of step 3 to 10 times overload (short)
The majority of open-loop feedback control mode, the encoder can also be connected to prevent the loss of step closed loop encoder feedback
Encoder Type – Optical Rotary Encoder (Incremental / Absolute), resolver-based
Response speed is generally fast
How equipped with bldc motor controller?
How equipped with bldc motor controller?
According to the motor current, with the greater than or equal to the current drive. If you need a low vibration or high accuracy, can be equipped with a sub-type drive. For high torque motor, as with high voltage drive to get good high speed performance.
2 phase and 5 phase bldc motor What’s the difference, how to choose?
2-phase motor and low cost, but the larger the vibration at low speeds, the torque at high speed down quickly. 5-phase vibration motor is smaller, high-speed performance, compared with 2-phase motors, high-speed 30 to 50%, in some cases replace bldc motor.
When to select a DC servo system, servo it What’s the difference?
Bldc motor into a DC brush and brushless motors.
Brush motor, low cost, simple structure, starting torque, wide speed range, easy control, the need to maintain, but easy to maintain (for brushes), generate electromagnetic interference, the environment requirements. Therefore, it can be used for cost-sensitive general industrial and civil applications.
Brushless motor, small size, light weight, large output, fast response, high-speed, inertia is small, smooth rotation, torque and stability. Control complex, easy to implement intelligent, flexible way to their electronic commutation, the commutation can be square wave or sine wave commutation. Motor maintenance-free, high efficiency, low operating temperature, electromagnetic radiation is very small, long-life, can be used in various environments.
AC bldc motor is brushless motor, is divided into synchronous and asynchronous motors, motion control in general are currently with the synchronous motor, its power range, can do a lot of power. Large inertia, the maximum rotation speed is low, and with the power increases rapidly reduced. Therefore suitable for low speed applications running smoothly.
The motor should pay attention to the problem?
The power to run before you make the following checks:
1) the appropriateness of the supply voltage (overvoltage is likely to cause damage to the driver module); for the DC input of + / – polarity must not be wrong, the motor drive controller on the model or the current setting is appropriate (do not start too);
2) control signal line connected, secure, industrial site is best to consider shielding (such as the use of twisted-pair);
3) Do not put the need to take the start line all connected, only the most basic system even as, well, then gradually connection.
4) The grounding method must be clear, or the use of float is not connected.
5) began running half an hour to closely observe the motor state, such as the movement is normal, sound and temperature, and found the problem immediately stop adjustment.
How to disconnect the bldc hub motor for electric bike?
Spring come,nice days to ride e-bikes.But when you take out of your old e-bike from warehouse and are going to ride it.Suddenly you would find there is strange noise from hub motor .
These days the electric bike motor are brushless gearless and used for electric bike widely.It was made of rotor-winding,magnet,hub,covers,axis,bearings…
If this bike motor has strange noise,generally it’s from rotor-winding rub magnet or the bearing is broken.It’s easy to solve it.The important is to disconnect this electric hub motor.
You should prepare some tools:
1.Hexagon wrench (Necessary)
2.Hammer (Necessary)
3.Screwdriver
Disconnect hub motor Step 1:
Take off nuts and gasket on axis and use hexagon wrench to loose 16 screws.
Step 2:
Make the hub motor stand and cable is bent inside.Left hand hold the hub motor and use hammer to knock the axis.
Step 3:
After some knock,the cover will take off hub.
Step 4:
Use the same way to knock the other axis,the other cover will also take off hub.
Step 5:
When both side covers are off hub,next we should take out the rotor-winding.Make the axis stands on the ground,both hands press hub motor,the rotor-winding will out of hub.
Step 6:
Check magnet around inside hub,if there is some metallic impurities stick on magnet.Please remove it.If no,but found some friction trace on magnet.Please check around the rotor-winding and remove some glue around the steel.If not,please check the bearing inside the cover.Use a little finger hold inside the bearing,use the other hand to turn cover,faster,better.If you hear some noise.Please replace bearings.
By now,you have solved problem.
History of torque bldc motor controller
History of torque bldc motor controller
The late 1850s, the initial low-speed torque bldc motor controller is a pump stator and rotor components evolved, this component consists of a ring gear and one with matching gear or rotor component. The fixed ring gear and the shell can be connected together, the oil from the port into a center to promote the revolution around the rotor. This slow rotation of the rotor drive shaft through the splined output as cycloid bldc motor . This after the advent of the first cycloid motor, after decades of evolution, another conception of the motor began to form. This motor is installed in a built-in ring roller. With roller motor provides high starting and running torque, roller reduces friction, thereby improving efficiency, even at very low speed output axis can produce a stable output. By changing the input and output flows in the direction of the motor to quickly change, and such values in both directions of torque. The series of motors have a variety of displacement were selected to meet a variety of speed and torque requirements.
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.