FluxMotor is dedicated to addressing the global design of electric motors. It enables engineers to accelerate the design of machines, quickly explore a variety of configurations while considering multiphysics constraints, and select the most promising options within minutes.
Within a single environment, the new multiphysics capabilities enable designers to not only predict the electromagnetic performance of the motor, but also to optimize the cooling strategies and the NVH performance.
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Abstract:This paper discusses an inverter-driven single-phase brushless direct-current (BLDC) motor assembled by a housing for a cordless vacuum cleaner. Air gap in the single-phase BLDC motor is asymmetrically designed to satisfy starting and continuous torque by considering voltage fluctuation in a battery. By varying both advance and conduction angles in response to the change of battery voltage, the proposed single-phase BLDC motor with asymmetric air gap is able to maintain sufficient output power. The system efficiency of a vacuum cleaner driven by the proposed motor assembly is estimated by means of fluid dynamics in air watt, and it is also verified experimentally. From the results of the condition of 100,020 r/min, it was confirmed that the motor efficiency was in good agreement with the estimated efficiency, and air flow efficiency of 45.7% and system efficiency of 41.8% were achieved.Keywords: single-phase BLDC motor; cordless vacuum cleaner; computational fluid dynamics; flow path efficiency
Our advanced design and optimization modeling software, PrintStator, significantly reduces design cycle time, eliminates human error, and quickly transforms your requirements into an optimized motor design with exact operating characteristics.
Motor and application tuning is performed through the Motor-Expert 2.0 GUI with control loop coefficients being updated in real-time without having to recompile code. The interface also enables users to visualize system operation, displaying the status of data, including current, speed, status, current error, and speed error. A diagnostics field within the software interface provides insight into inverter and motor operation.
The complete BridgeSwitch, Motor-Expert 2.0 and three-phase motor control software solution is available today and includes a downloadable manual for the software architecture, APIs, functions, calls and variables used in the code.
The new three-phase motor control code and Motor-Expert 2.0 tool are offered as part of the Motor-Expert Suite under a free license for use with BridgeSwitch ICs. BridgeSwitch ICs are priced starting at $1.69 in 10,000-unit quantities of the chipset. For further information, contact a Power Integrations sales representative.
Hi, thank you for the insightful information in this article, it has helped a lot. I would like to design a slow outrunner BLDC motor with nominal speed at around 160 RPMs. I plan to control it with a typical ESC. How do you suggest to design the stator (how many windings and how to wind it), and the rotor (how many poles)?
Motor-CAD is used in various and complex systems such as hybrid/electric vehicles, aircraft motors, wind power generation, submersible pumps, hermetic compressors, conveyer rollers and motorsport. We have an excellent track record of providing value for money services, applying engineering expertise and software tools to design products across a spectrum of applications.
Fortunately, this sector is rapidly maturing and silicon vendors now offer a wide range of highly-integrated BLDC motor driver power MOSFET chips with either external or embedded microcontrollers to simplify the design process, while also lowering component costs. This article will explain how the designer can take advantage of these latest chips to ease the design process
By far the most common configuration for sequentially applying current to a three-phase BLDC motor is to use three pairs of power MOSFETs arranged in a bridge structure, as shown in Figure 2. Each pair governs the switching of one phase of the motor. In a typical arrangement, the high-side MOSFETs are controlled using pulse-width modulation (PWM) which converts the input DC voltage into a modulated driving voltage. The use of PWM allows the start-up current to be limited and offers precise control over speed and torque. The PWM frequency is a trade-off between the switching losses that occur at high frequencies and the ripple currents that occur at low frequencies, and which in extreme cases, can damage the motor. Typically, designers use a PWM frequency of at least an order of magnitude higher than the maximum motor rotation speed.
Although PSpice is designed as an electronic circuit simulator, you can also use it to simulate mechanical or electromechanical systems. Analog Behavioral Modeling makes simulating mechanical systems much simpler. An example of an electromechanical system which can benefit from PSpice simulation is a Brushless DC motor.
* A test circuit for the motor .param twopi = 2*3.141596 .param P = 3 ; the number of phases .param A = 2 ;the number of north poles on the rotor * Connect one end of each phase winding to ct. x1 p1 ct p2 ct p3 ct shaft_speed shaft_angle bldcmtr + params: J=.30 B=.36 F=.72 D=2.9 A= A P= P CL=3mh CR=6ohm CC=.1pf + CM=.5 Cb=.12 Ct=300 twopi=twopi rct ct 0 1 ;hook ct to ground through current measuring resistor * Make some brushes Ep1x p1x 0 VALUE = V(on) * sin(A*V(shaft_angle) - (1-1)*(twopi/P)) Ep2x p2x 0 VALUE = V(on) * sin(A*V(shaft_angle) - (2-1)*(twopi/P)) Ep3x p3x 0 VALUE = V(on) * sin(A*V(shaft_angle) - (3-1)*(twopi/P)) r1 p1x 0 1 r2 p2x 0 1 r3 p3x 0 1 S1p ppwr p1 p1x 0 switchp S1n npwr p1 p1x 0 switchn S2p ppwr p2 p2x 0 switchp S2n npwr p2 p2x 0 switchn S3p ppwr p3 p3x 0 switchp S3n npwr p3 p3x 0 switchn * 5v to drive, 0v to brake Vppwr ppwr 0 PWL (0 5v .9 5v .901 0v 2s 0v) Vnpwr npwr 0 PWL (0 -5v .9 -5v .901 0v 2s 0v) * Clamping diodes to keep the kickback voltage down D1p p1 ppwr dmod D1n npwr p1 dmod D2p p2 ppwr dmod D2n npwr p2 dmod D3p p3 ppwr dmod D3n npwr p3 dmod .model switchp vswitch (RON = .1 ROFF = 1e5 VON= .86 VOFF= .84) .model switchn vswitch (RON = .1 ROFF = 1e5 VON=-.86 VOFF=-.84) .model dmod D (RS = 10) * "on" is used to enable the "brushes": 0 disconnects, 1 connects * brushes to power. Von on 0 PWL( 0,0 10ms,0 20ms,1 .8s,1 .81s,0 .9s,0 .91s,1) ron on 0 1 .watch tran V([Shaft_Speed]) .tran 10ms 2s .probe .options acct .end
Engineers working in electromagnetics and electric motor design need to be able to accurately predict how their devices will perform in real-world operating scenarios. The COMSOL Multiphysics simulation software and the AC/DC Module can be used to model electric motor designs.
Another innovation in the field of compact drive technology for the EJ series is the EJ7411 BLDC motor module. It offers high control performance in a very compact design for the medium power range of BLDC motors. Available module inputs include 2 x end positions, 1 x encoder, and 3 x Hall sensors, while outputs include 1 x BLDC motor, 1 x motor brake, 1 x sensor power supply and 1 x encoder power supply. The fast control technology and support for connection of an incremental encoder make it possible to achieve both very high speed profiles and dynamic positioning tasks. Numerous monitoring functions, such as overvoltage and undervoltage, overcurrent, module temperature and motor load (via calculation of an I2T model), result in maximum operational reliability. Further features of the 24 mm wide EtherCAT plug-in module include 4.5 A output current (Irms) and support of the distributed clocks functionality.
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