Speed ​​BLDC motor - induction motor problems

Speed ​​BLDC motor - induction motor problems:

From the electrical point of view of BLDC motor windings burning the cause of the malfunction, and the corresponding treatment.

First, missing running

1 Symptom BLDC motor can not start, even if the load can play a start, slowly increase speed, a hum; BLDC motor smoke fever, accompanied by burning smell.

2 Remove the BLDC motor cover test results can be seen winding end 1 / 3 or 2 / 3 of the pole windings or coke or become dark brown.

3. Failure causes and treatment

(1) motor power supply circuit fuse or a bad circuit by mechanical damage, resulting in a phase fuse blown.

(2) three-phase motor power supply circuit fuse different sizes, small capacity of the fuse. Should be based on the size of motor power, replace the same size fuse.

(3) motor power supply circuit in the switch (isolating switch, plastic lid switch, etc.) and contacts of the contact is bad (burn or loose). Repair and adjust the dynamic and static contact, so that good contact.

(4) lines of a relative phase. Found at the break, and securely connected.

(5) the connection between the motor windings Weld, leading to poor contact. Carefully check the motor windings and weld cable.

Second, the overload

1 speed BLDC motor current exceeds the rating of the motor symptoms; motor temperature exceeds the rated temperature rise.

2 test results BLDC motor winding all three groups burned; bearing frame without grease or sand damage; stator and rotor core with friction, commonly known as sweep chamber.

3. Failure causes and treatment

(1) heavy load, to consider the appropriate load shedding or replacement capacity suitable motor.

(2) The supply voltage is too high or too low, the need to install three-phase power regulator compensation cabinet.

(3) BLDC motor of serious long-term erosion of damp or corrosive gases, insulation resistance. Should be based on specific circumstances, for a major overhaul or replacement of the same capacity, closed with the specifications of the motor.

(4) bearing in oil, dry or rotor mechanical misalignment, leading to sweep rotor chamber, the motor current exceeds the rating. Should first carefully check the bearing wear, and if failed to be replaced with new shaft

Cheng; Second, cleaning bearings and into the amount of grease. Then check the motor cover, cover the center hole if the rotor due to wear and tear resulting in a different heart, should cover the treatment or replacement.

(5) institutional failure of transmission parts, resulting in motor overload and burnout BLDC motor windings. Check the mechanical part of the existing failure to take measures to deal with resolve to make it flexible rotation.

the heat of bldc motor controller

Technological progress to promote the development of BLDC motor

Technological progress to promote the development of BLDC motor

The 21st century, to meet the co-existence with the global environment, combined with the network, in line with the requirements of micro-motor robot will be rapid development, and build "a new era of micro-motor." Coexistence with the global environment, motor energy efficient, higher power saving materials, quiet and comfortable, harmless and pollution-free. Combined with the network, motor miniaturization, sheet, high-speed, lightweight, high-precision and high performance. Meet the robot motors, requiring higher power, low inertia, low speed high torque, intelligence, etc., in order to meet the above requirements, foreign micro motor manufacturing company attaches great importance to BLDC motor and drive control technology research and development. Motor to optimize the design, selecting parameters to reduce the torque ripple and noise, the expansion speed range; multi-pole concentrated winding to reduce the degree of winding end ministers, pieces hinged armature type or improve punching bad full rate, high efficiency performance drive control techniques, high-performance permanent magnetic materials used to make BLDC motor with high efficiency, higher power saving materials, high reliability and high performance, small size and light weight advantages.

small precision Oriental BLDC motor Japan

Production of small precision Oriental BLDC motor, Tokyo, Japan, the plant's first three places in Kokubunjicho Takamatsu, Kagawa Prefecture, to start operations next spring. Medical devices and automatic teller machine (ATM) as a base for BLDC motor controller and mass production, the production system aims to enhance growth in demand-looking.

Increasing demand from emerging active capital investment in response to advances in medical devices, such as Europe, aims to increase production capacity.引Ki上Getai hopes to 1.5 times the current production of the future in the province.

The new plant, "Kokubunji Takamatsu Plant" (tentative title) is to build distribution center in Kokubunji Route No. 32 near the bypass. Reinforced two-story building, total floor space of 6,000 square meters. To begin in September and will be operational in May next year. The total project cost of approximately 1.7 billion yen.

The company has offices in 12 of the country, Western Takamatsu (Takamatsu), Tarumi Takamatsu (same) manufactures small BLDC motors used in medical devices in two plants in the prefecture. After processing the plant material in slack, finishing of the product is responsible for Western business. Slack in the six-story offices on each floor is divided into inefficient production lines had been outgrown in expansion of production.

Kokubunji office is planning to move the main features of the business slack, while providing an efficient production of a single floor and advance the automation of the plant.

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BLDC motor controller by the converter

BLDC motor working principle

     BLDC motor controller, including the Ministry of Power and Control Division as below: Power Ministry to provide three-phase power to the motor, control by the Ministry of the demand for converting the input power frequency. Department of directly to the DC power input (typically 24V) or AC (110V/220 V), if we have to first AC input is converted to DC by the converter. Either DC or AC input to input into the motor coil will be required before the DC voltage converted by the inverter 3-phase voltage to drive the motor. Inverter is generally composed of six power transistors. Six power transistors connected to the motor, as the control flow through the motor coil switch.

    Make the motor turn up, the Ministry must first control the Hall IC to the motor rotor current location, then the stator winding in accordance with the decision on (or off) power transistor converter in order, so that current flows through the sequence motor coil forward (or reverse) rotating magnetic field, and interaction with the rotor magnet, so you can make the motor clockwise / counterclockwise rotation. When the rotor rotation to another group of Hall IC signal out of position, control of the Department again on the next set of power transistors, and so the motor can continue to rotate the same direction until the control of the Ministry decided to stop the rotor is shut down power transistor ; to reverse the rotor power transistor on the opposite order.

BLDC motor is a rotary machine

BLDC motor is a rotary machine, 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 the magnetic field leaving the role of rotation, some types of these machines can be used for motors, generators can be used.

BLDC motor controller 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, BLDC motor power by using a different DC motor and AC motor into the power system Most of the motor AC motor, which 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.