The BLDC motor is a revolving electric machine with a three-phase sensorless stator in the traditional design. The rotor, like an induction motor, features surface-mounted permanent magnets.
The rotor has no brushes, and commutation is done electronically at a certain rotor position. Because the displacement of the magnets on the rotor produces a trapezoidal BEMF form, a rectangular DC voltage can be employed to generate a rotational field with low torque ripples. Each phase of the motor might have more than one pole pair.
The ratio of the electrical revolution to the mechanical revolution is defined by the pole pair per phase. The rectangular shape of the applied voltage ensures control and drive simplicity.
The Global three phase sensorless drivers market accounted for $XX Billion in 2021 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2022 to 2030.
Texas Instruments DRV10987 50W 3-Phase Sensorless BLDC, 12V to 24V Motor A 180° sinusodial motor driver coupled with power MOSFETs provides continuous drive current of up to 2A.
The device distributes current to the motor with a low supply voltage of 6.2V while operating in an ambient temperature range of -40°C to 125°C. Overcurrent Protection detects rotor lock when the power supply voltage exceeds 28V, Lock Detection detects rotor lock state, and Anti-voltage Surge (AVS) Protection.
The DRV10987 provides continuous sinusoidal driving and employs a patented sensorless control approach that significantly reduces the pure tone acoustics that often arise during commutation.
The simple and adaptable I2C interface gives motor speed feedback in tandem with the FG pin. Furthermore, the I2C interface can be utilised to reprogram specific motor parameters in registers as well as to programme the EEPROM, resulting in improved performance in any given application.
The integrated buck regulator powers both internal and external circuits and reduces the DRV10987 to 5V. The DRV10987 is offered in a thermally efficient HTSSOP-24 package with an exposed thermal pad, and it is specifically developed for low-noise, low-external-component-count fan and pump applications.
The Three-Phase Sensorless BLDC Gate Drivers for Data Center Cooling Systems Portfolio of Allegro MicroSystems is Introduced. The A89332 and A89332-1, two of its newest products, were created to provide designers with versatile alternatives while meeting the changing demands of cooling systems in modern data centres.
These drivers allow for small, high-airflow fan designs to increase thermal efficiency, lowering energy consumption and data centre expenses. They are available with cutting-edge integrated power loss brakes (A89332) and AC-loss (A89332-1) capabilities. Backflow causes server fans to rotate in reverse when they fail or have mechanical issues.
Power consumption rises as a result of the other fans having to operate harder to make up for the reduced airflow.By applying a brake to malfunctioning fans and stopping them from spinning, the integrated power loss brake (PLB) function of the A89332 addresses these problems.
Its braking performance is four times greater than discrete solutions. In the end, this lowers the cost of running the data centre by lowering wasteful electricity use and improving thermal efficiency.
The industry’s smallest gate driver, provided in a 4mm x 4mm QFN package that is 36% smaller than comparable options—ideal for “donut” circuit boards—can now be used by Allegro to serve the high-end server market in conjunction with the A89332-AC 1’s loss logic.
Due to its cutting-edge embedded algorithms and graphical user interface (GUI), Allegro provides the only code-free server cooling fan solutions in the industry. This removes the requirement for an additional Hall-effect position sensor and motor control.
Both gate drivers build upon Allegro’s past and expertise in creating distinctive motor control devices for the automotive and industrial markets. The demand for creating data centres that use less energy and function more sustainably is growing.
Building low-maintenance “lights-out” facilities is only one aspect; server and component designers are also searching for fresh and inventive ways to cut down on heat and power usage, and fans play a significant role in this.
They have been concentrating on the data centre sector for a while, and with the advent of the A89332 and A89332-1, they are giving them better control over their cooling systems for optimum efficiency.
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