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Sensorless control technology has been a hotspot in the area of BLDCM control. In this paper, a speed controller of BLDCM based on MC56F8013 was researched using BEMF-crossing-zero-detecting method, including hardware circuit and software design. Experiments were implemented and it shows that the BEMF method for detecting rotor position signal is accurate and reliable, BLDC motor can commute and run...
Main purpose of this study is to control of a brushless dc motor by Self-Tuning PID method without using any sensor. In this context, the motor phase current measurements and back EMF estimation are done. The phase currents are used in the closed-loop control system as feedback currents for comutation of the motor. Because of noisy current data the filtering is carried out on computer environment...
In this paper the influence of geometry of permanent magnets and their basic parameters on the 1st harmonic of the magnetic flux in the air gap of the brushless DC motor are researched. The methodology of the brushless DC motor analysis is considered using functional relations. The paper includes the description of analysis methodology implementation stages: planning of computer experiments; its realization...
This paper presents the comprehensive geometric parameters design of a Homopolar Double Salient-Pole brushless dc motor. The under consideration configuration is designed based on having double layers of the stator/rotor and a stationary field assisted coil placed between them. The design methodology employed enabled a swift initial design of the lamination geometric parameters such as air-gap length,...
The brushless DC motors are also becoming popular in air conditioning fan motors, and protection of bearing from electro-erosion is becoming a major challenge in the North Europe market in particular. The bearing electro-erosion is caused when the bearing lubricant is dielectrically broken down, making current run on the inner race and outer race of the bearing. As a countermeasure, we verified that...
This paper presents the comparison of two brushless DC motors for the same automotive application. A commercial machine and a new designed motor, both used to power the fan of air conditioning system of automobile. Commercial software for designing machines was used to determine the comparison parameters. The study established the settings of the main parameters influencing the motor optimal operation...
Fault signals of motors is non-stationary typically. Conventional Fourier transform method can't meet the demand of fault signals extraction. Time-frequency analysis (TFA) based motor fault diagnosis methods, which can identify rotor faults by detecting time-varying frequency components of stator current signals, have been very important signal processing techniques. This paper proposes a new motor...
Randomness and volatility of distributed generator power have seriously affected its application in power system. To stabilize the DC bus voltage, as well as improve the reliability and quality of power supply of distributed power system, the flywheel energy storage system is connected to the distributed power system. By control of the charge and discharge of flywheel, voltage of the DC bus can remain...
Brush less dc motors have only decades of history. They have been gaining attention from various industrial and household appliance manufacturers because of its high efficiency, high power density and low maintenance cost, silent operation, compact form, and reliability. This paper describes the procedure of deriving a easy model for the brush less dc motor with 120-degree inverter system and its...
A new reliable sensorless startup strategy of brushless DC (BLDC) motor is proposed to prevent long time integration commutation error specialized for large inertia load and to adapt large disturbance torque fluctuation. It includes four segments: orientation segment, I/f startup segment, observer startup segment and back EMF startup segment. Experimental results show that the proposed method could...
The voltage source PWM inverter generally used to drive air-conditioning fans has posed a major problem, that being the high probability of electrical erosion of the bearing. Through inverter switching, a potential difference, called the shaft voltage, is generated between the inner and outer races, causing electrical breakdown of the bearing lubricant. This results in a current passing through the...
A brushless DC motor (BLDC) based on new type electromagnetic position sensor using the principle of electromagnetic induction is proposed in this paper. This position sensor is environmental adaptability, firm, durable and of high reliability. In this paper, the operating principle of the position sensor is described, the relation of the design parameters of the sensor is derived, and the simulating...
This paper presents a real-time attitude and altitude stabilization of a Quad-rotor UAV that uses Kalman Filter (KF) to estimate the accelerometer measurements from the Inertial Measurement Unit (IMU) to improve the flight in hovering mode to indoor and outdoor applications. It also presents a control strategy based on speed sensing in each brushless DC motors through a reflective sensor, resulting...
This paper proposes a new control scheme for the implementation of a low-cost and high efficiency sensorless speed control IC for single-phase brushless dc (BLDC) fan motors. The proposed control scheme detects the zero-crossing-point (ZCP) of the measured back-EMF to generate commutation signals without Hall sensor. A current mode soft switching scheme is used to smooth the current spikes induced...
This paper reports an adaptive gain sliding mode observer for Brushless DC (BLDC) motor for large variations in speed. BLDC motor based on sliding mode observer exhibits multiple zero crossing in back EMF which leads to commutation problem at low speed. In this paper a modified sliding mode observer incorporating the speed component in the estimation of back EMF is proposed. It is found that after...
This paper presents the practical implementation of the control of three phase Brushless DC (BLDC) motor in all the four quadrants. The controller dsPIC30F4011 is used. The four quadrant operation which was simulated using MATLAB / Simulink is implemented and analyzed [1]. A smooth transition between the quadrants is achieved. The time taken to change the direction of rotation of BLDC motor is also...
In this work sensorless control of BLDC Motor is investigated. In conventional control, it is generally required to measure the speed and position of rotor by using the sensors because the inverter phases, acting at any time, must be commutated depending on the rotor position. Sensorless control BLDC Motor involves estimation of parameters of BLDC drive system using Adaptive Neuro Fuzzy Inference...
Recently, the research in the area of autonomous miniature flying robots is growing thanks to the development of new configurations and prototypes of Unmanned Aerial Vehicles (UAV). In this paper, we introduce the problem of attitude and altitude control of a mini-quadrotor UAV in hovering-mode to indoor and outdoor applications. Therefore, we have implemented a control strategy based on speed sensing...
In the article, firstly it introduces the characteristic as well as its working principle of the chips MC33035 and MC33039 which MOTORALA Corporation specially designs. The design uses the PWM to control the rotational speed, and the Hall which is set in the motor exams rotor position, and the position signal obtained is received by the MC33035, and in the same time MC33035 carries on the decoding...
This paper studies a soft starter of six-phase BLDC motor, presents a soft start method based on complex programmable logic device (CPLD), analyzes the soft starting process of six-phase BLDC motor and the influence of PWM carrier frequency and duty on starting process, employs back EMF zero crossing detection circuit to detect the rotor position, designs the hardware circuit and program of the soft...
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