A Study on Low-Cost Sensorless Drive of Brushless DC Motor for Compressor Using Random PWM

A Low Cost Sensorless Control Drive Circuit for of Low Voltage Switched Reluctance Motor

Shaft position sensing is an essential part of switched reluctance (SR) motor drive In order to synchronize the pulses of phase current with the period of rising inductance of the proper motor phase. Direct sensors such as, Hall effect and optical encoder are commonly used in SR motors. The purpose of this paper is to present an indirect shaft positioning sensing known as "sensorless " control ...

Sensorless Drive of Brushless Dc Motor Based upon Wavelet Analysis

This study tackles to develop a sensorless drive technique for brushless dc motors (BLDC) by using wavelet theory. Initially a BLDC motor with hall sensors is handled. The simulink model of the motor is established and the simulation performances are obtained. Then BLDC motor’s PWM pulses are produced by DS2201 dSPACE digital signal processing (DSP) rapid control prototyping kit. The time domai...

Sensorless Control of a Brushless DC Motor

This paper uses a new position sensor less drive for brushless DC (BLDC) motors. In conventional sensor less control methods such as the back-EMF detection method, the performance is high only at a high speed range due to the fact that the magnitude of the back-EMF is dependent on the rotor speed. A solution is derived that estimates the rotor position by using an unknown input observer over a ...

Study on High-Efficiency Brushless DC Motor for Compressor

In Japan, room air conditioners, mainly heat-pump type, have been widely introduced into households. And "one unit to one room" really features today rather than "one unit to one home" in the past. In the circumstances where room-by-room air conditioning or all-season air conditioning systems are increasing, reduction of electric power consumption strongly required. As a consequence, the effici...

“study of Soft Switching Converter for Brushless Dc Motor Drive”