The Brushless DC (BLDC) ceiling fan controller with sensorless sinusoidal present management design runs from AC energy and might convert 90-265 VAC into 24 VDC.
Within the ceiling fan section, single-phase induction motors have historically dominated attributable to their potential to run straight from generally out there energy sources in properties/workplaces. Nonetheless, these motors are recognized for his or her excessive energy consumption and comparatively low effectivity, usually working at round 30-40% effectivity. Furthermore, the pace management mechanism, which includes voltage regulation, introduces further losses to the system and makes it difficult to take care of a relentless pace attributable to fluctuations in enter voltage. To unravel this drawback Texas Devices (TI) has launched a Brushless DC (BLDC) ceiling fan controller with sensorless sinusoidal present management TIDA00386 reference design. The design runs from AC energy and might convert 90-265 VAC into 24 VDC. The reference design gives a complete answer for ceiling fan purposes utilising a 3-phase Brushless DC (BLDC) motor. The design is finest suited to varied industrial purposes corresponding to dental chairs, operation energy conditioning, Electrosurgery system, and so forth.
The design options sinusoidal sensorless management at a frequency of 25 kHz, which ensures minimal torque ripple and reduces audible noise. It operates inside a large common AC voltage vary of 90 Vac to 265 Vac. The tightly regulated 24V dc energy provide maintains a ±1% pace regulation throughout all the enter voltage vary. The AC switching mechanism produces solely 0.6% ripple on the 24V dc output, optimising acoustic efficiency. Moreover, the AC/DC part reveals excessive effectivity, exceeding 85% below all load and line circumstances, assembly strict vitality effectivity requirements. The reference design contains three distinct sections particularly the AC-DC part, motor management part and Infrared (IR) remote-based Velocity management part.
The AC-DC part of the design is particularly engineered to function inside a common fundamental AC enter vary of 90VAC-265VAC. It utilises a flyback AC/DC topology to generate a 24V DC enter energy from the principle AC supply. The motor management part of the design is centred round a single-chip built-in circuit (IC) designed to function at 24Vdc. This IC combines all of the important elements required for 3-phase BLDC motor management, together with a sinusoidal sensorless movement management engine and a 3-phase H-bridge inverter with pre-drivers. Moreover, it gives a regulated 3.3V output to help exterior a great deal of as much as 100mA. The Velocity management part of the design is predicated on the value-line MSP430G2201 microcontroller. This microcontroller is liable for decoding the inputs from the IR distant and producing the Pulse Width Modulation (PWM ) obligation cycle instructions for controlling the fan pace. It allows the remote-based management of the fan’s pace by receiving indicators from the IR distant and translating them into acceptable instructions to regulate the PWM obligation cycle, thereby regulating the fan’s pace.
This reference design has been examined by TI. It comes with a Invoice of Materials (BOM), schematics, Gerber file, Printed circuit board (PCB) structure, CAD/CAE image, Meeting drawing, Schematic, and so forth. Yow will discover further information concerning the reference design on the corporate’s web site. To learn extra about this reference design, click on right here.
